From patchwork Thu Jan 12 19:43:15 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 642469 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D22EDC677F1 for ; Thu, 12 Jan 2023 20:03:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240738AbjALUD0 (ORCPT ); Thu, 12 Jan 2023 15:03:26 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44280 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233260AbjALT7Q (ORCPT ); Thu, 12 Jan 2023 14:59:16 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9C7CE218F; Thu, 12 Jan 2023 11:58:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=K+6/dwXz2WKb5RxNLU2q+chP38k8rKZMVN0FbUJ4gys=; b=e3vkpUDdiOAf7CjhxYGxzjBd80 vuOS3u2UAGe+Dwh2zl+BK7hpq/6Wo1bhb+wqezjlnqtJUp/9qqaI/+G7iitUzm5j81PEfD8eL4XOt Dl+fYdsyi6D+l1SDL4Vi0r1V26SlxL/ZgX6ot+aDeug82NzgXPPw5NEeOPicYE6lQQLT0KYNBT5wB WjeV8R2S2pJ1b8q89/5sY1sLc/7Krpf6gGr5rHZFOiGQiqSi5u+8MursRS1Y39hxQmBVRMCWF2pP3 d2VEh6fKmIBwjNLBRZztJmlnZybPVX7XZBcPpaIWv7JS6dhPUVMxtToF9wtJC6Bm19qhXArXIKkCH XCOl4dxg==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1pG3hV-005Oc8-K1; Thu, 12 Jan 2023 19:57:25 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 2A62C300C9D; Thu, 12 Jan 2023 20:57:11 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 8D9992CCF1F4A; Thu, 12 Jan 2023 20:57:07 +0100 (CET) Message-ID: <20230112195539.392862891@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:15 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 01/51] x86/perf/amd: Remove tracing from perf_lopwr_cb() References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org The perf_lopwr_cb() is called from the idle routines; there is no RCU there, we must not enter tracing. Signed-off-by: Peter Zijlstra (Intel) Acked-by: Rafael J. Wysocki Acked-by: Frederic Weisbecker Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- arch/x86/events/amd/brs.c | 13 +++++-------- arch/x86/include/asm/perf_event.h | 2 +- 2 files changed, 6 insertions(+), 9 deletions(-) --- a/arch/x86/events/amd/brs.c +++ b/arch/x86/events/amd/brs.c @@ -41,18 +41,15 @@ static inline unsigned int brs_to(int id return MSR_AMD_SAMP_BR_FROM + 2 * idx + 1; } -static inline void set_debug_extn_cfg(u64 val) +static __always_inline void set_debug_extn_cfg(u64 val) { /* bits[4:3] must always be set to 11b */ - wrmsrl(MSR_AMD_DBG_EXTN_CFG, val | 3ULL << 3); + __wrmsr(MSR_AMD_DBG_EXTN_CFG, val | 3ULL << 3, val >> 32); } -static inline u64 get_debug_extn_cfg(void) +static __always_inline u64 get_debug_extn_cfg(void) { - u64 val; - - rdmsrl(MSR_AMD_DBG_EXTN_CFG, val); - return val; + return __rdmsr(MSR_AMD_DBG_EXTN_CFG); } static bool __init amd_brs_detect(void) @@ -338,7 +335,7 @@ void amd_pmu_brs_sched_task(struct perf_ * called from ACPI processor_idle.c or acpi_pad.c * with interrupts disabled */ -void perf_amd_brs_lopwr_cb(bool lopwr_in) +void noinstr perf_amd_brs_lopwr_cb(bool lopwr_in) { struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events); union amd_debug_extn_cfg cfg; --- a/arch/x86/include/asm/perf_event.h +++ b/arch/x86/include/asm/perf_event.h @@ -554,7 +554,7 @@ extern void perf_amd_brs_lopwr_cb(bool l DECLARE_STATIC_CALL(perf_lopwr_cb, perf_amd_brs_lopwr_cb); -static inline void perf_lopwr_cb(bool lopwr_in) +static __always_inline void perf_lopwr_cb(bool lopwr_in) { static_call_mod(perf_lopwr_cb)(lopwr_in); } From patchwork Thu Jan 12 19:43:16 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 641836 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B569AC61DB3 for ; Thu, 12 Jan 2023 20:12:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233054AbjALUMX (ORCPT ); Thu, 12 Jan 2023 15:12:23 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44224 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232226AbjALT7M (ORCPT ); Thu, 12 Jan 2023 14:59:12 -0500 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 97EE5B8D; Thu, 12 Jan 2023 11:58:05 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=tPOdw9LFGiPCDTfwXmDjC03yH+Atd2yWpwgqK4SP6Bs=; b=MCFGk/zfAQ1MOxe655CfrxSndB KMsj8OM47QEIEF+dE7LPbkmxg/PQAts31gFJ5Xz3no3m62IuisxdrSXrLN8SYgr1mtDIwtR8p1Foy vgMnbz7h6ch5F50b53yunuqk9MFEuX5uEMORRcRhTqQRFnQzXIgNjlWLrzQ8IyZodgjiEI5j/hfm2 jtsLGmSu2xYww6Em1c+Sd7XPqSMSM0BgTy1Y9iUSaQMsmpIltEMs2Z+FvPcdV8LPGTs0uCR8XY70j Jdml4OVol/2E06Nb6eijodGglka4wn0K9TaSFCWA1YgF/306McxeUsk6Jgniwje3STV7G1K2gesSb SZObcOlw==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1pG3hA-0045no-1f; Thu, 12 Jan 2023 19:57:05 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 6D3F6301D8A; Thu, 12 Jan 2023 20:57:11 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 9180D2CCF0C22; Thu, 12 Jan 2023 20:57:07 +0100 (CET) Message-ID: <20230112195539.453613251@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:16 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 02/51] x86/idle: Replace x86_idle with a static_call References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Typical boot time setup; no need to suffer an indirect call for that. Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Frederic Weisbecker Reviewed-by: Rafael J. Wysocki Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- arch/x86/kernel/process.c | 50 +++++++++++++++++++++++++--------------------- 1 file changed, 28 insertions(+), 22 deletions(-) --- a/arch/x86/kernel/process.c +++ b/arch/x86/kernel/process.c @@ -24,6 +24,7 @@ #include #include #include +#include #include #include #include @@ -692,7 +693,23 @@ void __switch_to_xtra(struct task_struct unsigned long boot_option_idle_override = IDLE_NO_OVERRIDE; EXPORT_SYMBOL(boot_option_idle_override); -static void (*x86_idle)(void); +/* + * We use this if we don't have any better idle routine.. + */ +void __cpuidle default_idle(void) +{ + raw_safe_halt(); +} +#if defined(CONFIG_APM_MODULE) || defined(CONFIG_HALTPOLL_CPUIDLE_MODULE) +EXPORT_SYMBOL(default_idle); +#endif + +DEFINE_STATIC_CALL_NULL(x86_idle, default_idle); + +static bool x86_idle_set(void) +{ + return !!static_call_query(x86_idle); +} #ifndef CONFIG_SMP static inline void play_dead(void) @@ -715,28 +732,17 @@ void arch_cpu_idle_dead(void) /* * Called from the generic idle code. */ -void arch_cpu_idle(void) -{ - x86_idle(); -} - -/* - * We use this if we don't have any better idle routine.. - */ -void __cpuidle default_idle(void) +void __cpuidle arch_cpu_idle(void) { - raw_safe_halt(); + static_call(x86_idle)(); } -#if defined(CONFIG_APM_MODULE) || defined(CONFIG_HALTPOLL_CPUIDLE_MODULE) -EXPORT_SYMBOL(default_idle); -#endif #ifdef CONFIG_XEN bool xen_set_default_idle(void) { - bool ret = !!x86_idle; + bool ret = x86_idle_set(); - x86_idle = default_idle; + static_call_update(x86_idle, default_idle); return ret; } @@ -859,20 +865,20 @@ void select_idle_routine(const struct cp if (boot_option_idle_override == IDLE_POLL && smp_num_siblings > 1) pr_warn_once("WARNING: polling idle and HT enabled, performance may degrade\n"); #endif - if (x86_idle || boot_option_idle_override == IDLE_POLL) + if (x86_idle_set() || boot_option_idle_override == IDLE_POLL) return; if (boot_cpu_has_bug(X86_BUG_AMD_E400)) { pr_info("using AMD E400 aware idle routine\n"); - x86_idle = amd_e400_idle; + static_call_update(x86_idle, amd_e400_idle); } else if (prefer_mwait_c1_over_halt(c)) { pr_info("using mwait in idle threads\n"); - x86_idle = mwait_idle; + static_call_update(x86_idle, mwait_idle); } else if (cpu_feature_enabled(X86_FEATURE_TDX_GUEST)) { pr_info("using TDX aware idle routine\n"); - x86_idle = tdx_safe_halt; + static_call_update(x86_idle, tdx_safe_halt); } else - x86_idle = default_idle; + static_call_update(x86_idle, default_idle); } void amd_e400_c1e_apic_setup(void) @@ -925,7 +931,7 @@ static int __init idle_setup(char *str) * To continue to load the CPU idle driver, don't touch * the boot_option_idle_override. */ - x86_idle = default_idle; + static_call_update(x86_idle, default_idle); boot_option_idle_override = IDLE_HALT; } else if (!strcmp(str, "nomwait")) { /* From patchwork Thu Jan 12 19:43:17 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 642475 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B24DDC54EBE for ; Thu, 12 Jan 2023 20:03:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241080AbjALUCx (ORCPT ); Thu, 12 Jan 2023 15:02:53 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44224 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231422AbjALT7Q (ORCPT ); Thu, 12 Jan 2023 14:59:16 -0500 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7EBB71166; Thu, 12 Jan 2023 11:58:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=zetob5Egrh+4xSqY+h3U8eHRaaU6Xv/VYHG/8LvUn9U=; b=P4i/omQYS2c4f0pwMTMkXM7j2X qJur7CkzxBC/GAU5wSCy3aehA4zWa0OmdBqbT6qY2jmT0FgaYdOKmbFGOayL9YfoaPEncPRqOoAWQ Apd4LJSwCUz+lpIuFuwXX7fbyK+wx7d7D3n/wBaUXzFhVhRjwOl2GQkk2H6N6KFmG5Fs4tjUCOJ79 qD5cQpDJnrGZaTwkaMuXTp0xc9+48nT3G14FZoz7hv+Bky+r6kTqzsL5C7tpum1a5LKQ3dczu/7a9 bD3C/UN0jltBjYTriwP7PcRBVXaoGmCZYtrnXxXRUPcnxAtxcmdN30dQ4gZp4jHljLa1ez5A2hOfv v6yDyNpg==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1pG3hC-0045nw-0W; Thu, 12 Jan 2023 19:57:06 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id E0BDF303382; Thu, 12 Jan 2023 20:57:12 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 956222CCF1F48; Thu, 12 Jan 2023 20:57:07 +0100 (CET) Message-ID: <20230112195539.515253662@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:17 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 03/51] cpuidle/poll: Ensure IRQ state is invariant References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org cpuidle_state::enter() methods should be IRQ invariant. Additionally make sure to use raw_local_irq_*() methods since this cpuidle callback will be called with RCU already disabled. Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Rafael J. Wysocki Reviewed-by: Frederic Weisbecker Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- drivers/cpuidle/poll_state.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/drivers/cpuidle/poll_state.c +++ b/drivers/cpuidle/poll_state.c @@ -17,7 +17,7 @@ static int __cpuidle poll_idle(struct cp dev->poll_time_limit = false; - local_irq_enable(); + raw_local_irq_enable(); if (!current_set_polling_and_test()) { unsigned int loop_count = 0; u64 limit; @@ -36,6 +36,8 @@ static int __cpuidle poll_idle(struct cp } } } + raw_local_irq_disable(); + current_clr_polling(); return index; From patchwork Thu Jan 12 19:43:18 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 642457 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A060FC678DD for ; Thu, 12 Jan 2023 20:04:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241467AbjALUD7 (ORCPT ); Thu, 12 Jan 2023 15:03:59 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44162 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232583AbjALT7N (ORCPT ); Thu, 12 Jan 2023 14:59:13 -0500 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 529DDE85; Thu, 12 Jan 2023 11:58:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=Xy9+JvHHctWh2TNOLRKTbmGfpkTQoSEdFlJnj8l2Ws0=; b=H/JWwXj+fruT2n2ZggShyCiaCr C0NO8NHqWgGdWdfhj47dyjkAOMyjOvS98/iJtTLXBjiZzyHX2eEymB/xPkkf4LWGqUonmm8rtzHQt onCM6HJZ8sxPDUGvmqQPcy8e1XwIg6xOdxox8aOm71bfnN25uLQabCsLErFKiCQtQ2khpLz1Mk4s8 i5nZs4+e5gXEvI6IXuz+LSuYp8m8dgqmXGQysL0IhMZ9nc3NzV7/9PvpGGt//aarH3f/ZUWr9mvBX 1JW+DC86JnLlhRDgTFVQSBqPdoic2gviPxZdLhMOL6P5ea4+OLbYAOGIeiQ+hA3yTyP4gAJOMSOE1 02EZj2mw==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1pG3hC-0045nx-0Y; Thu, 12 Jan 2023 19:57:06 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id E1A413033C0; Thu, 12 Jan 2023 20:57:12 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 996452CCF1F4C; Thu, 12 Jan 2023 20:57:07 +0100 (CET) Message-ID: <20230112195539.576412812@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:18 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 04/51] cpuidle: Move IRQ state validation References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Make cpuidle_enter_state() consistent with the s2idle variant and verify ->enter() always returns with interrupts disabled. Signed-off-by: Peter Zijlstra (Intel) Acked-by: Rafael J. Wysocki Acked-by: Frederic Weisbecker Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- drivers/cpuidle/cpuidle.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) --- a/drivers/cpuidle/cpuidle.c +++ b/drivers/cpuidle/cpuidle.c @@ -236,7 +236,11 @@ int cpuidle_enter_state(struct cpuidle_d stop_critical_timings(); if (!(target_state->flags & CPUIDLE_FLAG_RCU_IDLE)) ct_idle_enter(); + entered_state = target_state->enter(dev, drv, index); + if (WARN_ONCE(!irqs_disabled(), "%ps leaked IRQ state", target_state->enter)) + raw_local_irq_disable(); + if (!(target_state->flags & CPUIDLE_FLAG_RCU_IDLE)) ct_idle_exit(); start_critical_timings(); @@ -248,12 +252,8 @@ int cpuidle_enter_state(struct cpuidle_d /* The cpu is no longer idle or about to enter idle. */ sched_idle_set_state(NULL); - if (broadcast) { - if (WARN_ON_ONCE(!irqs_disabled())) - local_irq_disable(); - + if (broadcast) tick_broadcast_exit(); - } if (!cpuidle_state_is_coupled(drv, index)) local_irq_enable(); From patchwork Thu Jan 12 19:43:19 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 641854 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D75FAC71136 for ; Thu, 12 Jan 2023 20:03:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241238AbjALUDZ (ORCPT ); Thu, 12 Jan 2023 15:03:25 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44276 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233136AbjALT7Q (ORCPT ); Thu, 12 Jan 2023 14:59:16 -0500 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7C7B91158; Thu, 12 Jan 2023 11:58:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=WMNBIHuf5Xvagmacq/Rua4pXk5oPDpB6DgeHQM3GMNM=; b=es5m3oBDVYAufupUiNRqWVO/RC MYP0S6vTEQIbAtHzKYccz/yD5ZJfSxH9DW1PqaDm8BnynuDBcuJMnpzWeo6k5K28cXrf5BUpOvyRr xaY22ofQsLUZLQPbZOhkA0+xsNh1dp/NxWTMYdUVjlmzayvj2xdsZ7a2oSv/l33qTbfetO+Pw0V/I s1znooGKEDK6lbfVRoWFUbM9UyYPnPakeUa1Gz+aSdCTur5B2tOgIbesDW5Iyi7MQLzRwPF7Yt/fl Qgk4xgzWvHAtQv4OyPaMs4bO0FVa2EriT3ha9hGgBgou9pT7heRoYtwRBcm2JrKwksIjfWYv4TiqL QjNa+ngQ==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1pG3hC-0045o5-1E; Thu, 12 Jan 2023 19:57:07 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id EF9C8300C9D; Thu, 12 Jan 2023 20:57:12 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 9D69C2CCF1F4E; Thu, 12 Jan 2023 20:57:07 +0100 (CET) Message-ID: <20230112195539.637185846@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:19 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 05/51] cpuidle,riscv: Push RCU-idle into driver References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Doing RCU-idle outside the driver, only to then temporarily enable it again, at least twice, before going idle is daft. That is, once implicitly through the cpu_pm_*() calls and once explicitly doing ct_irq_*_irqon(). Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Anup Patel Reviewed-by: Frederic Weisbecker Acked-by: Rafael J. Wysocki Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- drivers/cpuidle/cpuidle-riscv-sbi.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) --- a/drivers/cpuidle/cpuidle-riscv-sbi.c +++ b/drivers/cpuidle/cpuidle-riscv-sbi.c @@ -116,12 +116,12 @@ static int __sbi_enter_domain_idle_state return -1; /* Do runtime PM to manage a hierarchical CPU toplogy. */ - ct_irq_enter_irqson(); if (s2idle) dev_pm_genpd_suspend(pd_dev); else pm_runtime_put_sync_suspend(pd_dev); - ct_irq_exit_irqson(); + + ct_idle_enter(); if (sbi_is_domain_state_available()) state = sbi_get_domain_state(); @@ -130,12 +130,12 @@ static int __sbi_enter_domain_idle_state ret = sbi_suspend(state) ? -1 : idx; - ct_irq_enter_irqson(); + ct_idle_exit(); + if (s2idle) dev_pm_genpd_resume(pd_dev); else pm_runtime_get_sync(pd_dev); - ct_irq_exit_irqson(); cpu_pm_exit(); @@ -246,6 +246,7 @@ static int sbi_dt_cpu_init_topology(stru * of a shared state for the domain, assumes the domain states are all * deeper states. */ + drv->states[state_count - 1].flags |= CPUIDLE_FLAG_RCU_IDLE; drv->states[state_count - 1].enter = sbi_enter_domain_idle_state; drv->states[state_count - 1].enter_s2idle = sbi_enter_s2idle_domain_idle_state; From patchwork Thu Jan 12 19:43:20 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 642474 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8AE68C54EBE for ; Thu, 12 Jan 2023 20:03:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241086AbjALUDC (ORCPT ); Thu, 12 Jan 2023 15:03:02 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44254 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232908AbjALT7P (ORCPT ); Thu, 12 Jan 2023 14:59:15 -0500 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 031DA10B2; Thu, 12 Jan 2023 11:58:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=Z3KKcWa6kIo8XxnBPrwezUQgJ6x9WmWZQX/flafg2tU=; b=dnEhyaW7XOsB2YpOBoTADjeNXQ IXWZxR75snHap90Lr08HV1maU619oZJ1GEpbol5ZYaRPOl7n1+/PvdCAoFHzr1VZngOtd9tNu4AJe JbYbWWZoHTUblYzvKKIyp4M57vZhpHuHd0Qs6KEabiRHw/69zaV9V8IuAR0xkXGYUGgdZ/D3KW0Lw gZ1sfOKMV7qOsNX44ylTMfUurHULzuKa+krQs21KzN3l/jzFulIFs7OC9ndnx7SQSLZ/MB9yBmTZ0 owPgCsZudd1AQ3nEET8reWiJHLFNoTu8ipZ2iIpJw6ty3XIl5y8q2CG+vptuCmh4HW/vqXxlviMme vbPP3xtw==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1pG3hC-0045o8-1S; Thu, 12 Jan 2023 19:57:07 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 016B13033ED; Thu, 12 Jan 2023 20:57:13 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id A39622CCF1F58; Thu, 12 Jan 2023 20:57:07 +0100 (CET) Message-ID: <20230112195539.699546331@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:20 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 06/51] cpuidle,tegra: Push RCU-idle into driver References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Doing RCU-idle outside the driver, only to then temporarily enable it again, at least twice, before going idle is daft. Notably once implicitly through the cpu_pm_*() calls and once explicitly doing RCU_NONIDLE(). Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Frederic Weisbecker Acked-by: Rafael J. Wysocki Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- drivers/cpuidle/cpuidle-tegra.c | 21 ++++++++++++++++----- 1 file changed, 16 insertions(+), 5 deletions(-) --- a/drivers/cpuidle/cpuidle-tegra.c +++ b/drivers/cpuidle/cpuidle-tegra.c @@ -180,9 +180,11 @@ static int tegra_cpuidle_state_enter(str } local_fiq_disable(); - RCU_NONIDLE(tegra_pm_set_cpu_in_lp2()); + tegra_pm_set_cpu_in_lp2(); cpu_pm_enter(); + ct_idle_enter(); + switch (index) { case TEGRA_C7: err = tegra_cpuidle_c7_enter(); @@ -197,8 +199,10 @@ static int tegra_cpuidle_state_enter(str break; } + ct_idle_exit(); + cpu_pm_exit(); - RCU_NONIDLE(tegra_pm_clear_cpu_in_lp2()); + tegra_pm_clear_cpu_in_lp2(); local_fiq_enable(); return err ?: index; @@ -226,6 +230,7 @@ static int tegra_cpuidle_enter(struct cp struct cpuidle_driver *drv, int index) { + bool do_rcu = drv->states[index].flags & CPUIDLE_FLAG_RCU_IDLE; unsigned int cpu = cpu_logical_map(dev->cpu); int ret; @@ -233,9 +238,13 @@ static int tegra_cpuidle_enter(struct cp if (dev->states_usage[index].disable) return -1; - if (index == TEGRA_C1) + if (index == TEGRA_C1) { + if (do_rcu) + ct_idle_enter(); ret = arm_cpuidle_simple_enter(dev, drv, index); - else + if (do_rcu) + ct_idle_exit(); + } else ret = tegra_cpuidle_state_enter(dev, index, cpu); if (ret < 0) { @@ -285,7 +294,8 @@ static struct cpuidle_driver tegra_idle_ .exit_latency = 2000, .target_residency = 2200, .power_usage = 100, - .flags = CPUIDLE_FLAG_TIMER_STOP, + .flags = CPUIDLE_FLAG_TIMER_STOP | + CPUIDLE_FLAG_RCU_IDLE, .name = "C7", .desc = "CPU core powered off", }, @@ -295,6 +305,7 @@ static struct cpuidle_driver tegra_idle_ .target_residency = 10000, .power_usage = 0, .flags = CPUIDLE_FLAG_TIMER_STOP | + CPUIDLE_FLAG_RCU_IDLE | CPUIDLE_FLAG_COUPLED, .name = "CC6", .desc = "CPU cluster powered off", From patchwork Thu Jan 12 19:43:21 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 642467 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 79990C678D8 for ; Thu, 12 Jan 2023 20:03:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241278AbjALUD2 (ORCPT ); Thu, 12 Jan 2023 15:03:28 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44222 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233054AbjALT7P (ORCPT ); Thu, 12 Jan 2023 14:59:15 -0500 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 58B42111A; Thu, 12 Jan 2023 11:58:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=REiFsq8Cu55BI5UIL8KISCBnMH5PlDDv/02JyaHCfws=; b=ZubM8vIp9Gjo7GwJsBdrYzbOzs QOVGmZ4bWo0Q6sv20x1XlcD9CRW8N4IP7OgbgESc5RJ6qK0XbpduvgLbtC0g+RocjgmzuC01nPkxn Nll1ch6FXB7zNPboeIh6WXrc2C5vVgpNXrYASNYw878FKX2W98ff9mJt7YcW2DLL4Kvaz6ApwZ2QZ 8LnFl7cnW88pgaQ3H98ktINkHpxIuRtLPTKQJumh2b6fK1BqXpPU1/rzjoyF4kcz0/Cm1ZTiiORYm cBN7GiCc0pPVS0TbTFnZfo5/yX1v5qFf5zifIEQjIZN7jBbFEein8h2c69qoGRQNBpnSSi3z9vbhr mBjy5WPQ==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1pG3hC-0045o9-24; Thu, 12 Jan 2023 19:57:07 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 0A1943033F4; Thu, 12 Jan 2023 20:57:13 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id A81F92CCF1F5A; Thu, 12 Jan 2023 20:57:07 +0100 (CET) Message-ID: <20230112195539.760296658@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:21 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Kajetan Puchalski , Ulf Hansson Subject: [PATCH v3 07/51] cpuidle,psci: Push RCU-idle into driver References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Doing RCU-idle outside the driver, only to then temporarily enable it again, at least twice, before going idle is daft. Notably once implicitly through the cpu_pm_*() calls and once explicitly doing ct_irq_*_irqon(). Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Frederic Weisbecker Reviewed-by: Guo Ren Acked-by: Rafael J. Wysocki Tested-by: Kajetan Puchalski Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- drivers/cpuidle/cpuidle-psci.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) --- a/drivers/cpuidle/cpuidle-psci.c +++ b/drivers/cpuidle/cpuidle-psci.c @@ -69,12 +69,12 @@ static int __psci_enter_domain_idle_stat return -1; /* Do runtime PM to manage a hierarchical CPU toplogy. */ - ct_irq_enter_irqson(); if (s2idle) dev_pm_genpd_suspend(pd_dev); else pm_runtime_put_sync_suspend(pd_dev); - ct_irq_exit_irqson(); + + ct_idle_enter(); state = psci_get_domain_state(); if (!state) @@ -82,12 +82,12 @@ static int __psci_enter_domain_idle_stat ret = psci_cpu_suspend_enter(state) ? -1 : idx; - ct_irq_enter_irqson(); + ct_idle_exit(); + if (s2idle) dev_pm_genpd_resume(pd_dev); else pm_runtime_get_sync(pd_dev); - ct_irq_exit_irqson(); cpu_pm_exit(); @@ -240,6 +240,7 @@ static int psci_dt_cpu_init_topology(str * of a shared state for the domain, assumes the domain states are all * deeper states. */ + drv->states[state_count - 1].flags |= CPUIDLE_FLAG_RCU_IDLE; drv->states[state_count - 1].enter = psci_enter_domain_idle_state; drv->states[state_count - 1].enter_s2idle = psci_enter_s2idle_domain_idle_state; psci_cpuidle_use_cpuhp = true; From patchwork Thu Jan 12 19:43:22 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 642473 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AC1ACC678D9 for ; Thu, 12 Jan 2023 20:03:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241112AbjALUDJ (ORCPT ); Thu, 12 Jan 2023 15:03:09 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44296 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234248AbjALT7S (ORCPT ); Thu, 12 Jan 2023 14:59:18 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 40CF725F8; Thu, 12 Jan 2023 11:58:08 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=uinp+F1SpsUbDqJ/LD9jugydtpLudfVqOBpAkBm/Kuw=; b=YR175EZY4r1kZkSNwONKk5sRjm 0Jh9q1s+0AnbJ3XR1s+uETOHy6/KMPWcZ2A/3pPA2YRmIe4FLXT5YQWBLkP162ZQZQxcLo5zKmBR8 yPxuLFclFoYWLWUAfQaCyKbJfRfGBsr2SyTtFnOANeO7FTb/SglFZ6SweZE90daB8dw1ASmM8UjQM M4ZnMo5a3b3a00pQSh2naJ9Y8eCc6pRMpPzYKWwgFkcsiZ93mCPMmAdByjjnxT7hStav5sFWJ+w/a kpBCoIODr/szF4CoOZ9aEs2Ye7nsYGTHHRFperi/Zde5nuQcuGmRSiIIIE6VXydfVcevstKfVVHvk kpjr9KYQ==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1pG3hY-005OcU-0E; Thu, 12 Jan 2023 19:57:28 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 0E3943033F9; Thu, 12 Jan 2023 20:57:13 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id ADA0F2CCF1F54; Thu, 12 Jan 2023 20:57:07 +0100 (CET) Message-ID: <20230112195539.821714572@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:22 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 08/51] cpuidle,imx6: Push RCU-idle into driver References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Doing RCU-idle outside the driver, only to then temporarily enable it again, at least twice, before going idle is daft. Notably both cpu_pm_enter() and cpu_cluster_pm_enter() implicity re-enable RCU. Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Frederic Weisbecker Acked-by: Rafael J. Wysocki Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- arch/arm/mach-imx/cpuidle-imx6sx.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) --- a/arch/arm/mach-imx/cpuidle-imx6sx.c +++ b/arch/arm/mach-imx/cpuidle-imx6sx.c @@ -47,7 +47,9 @@ static int imx6sx_enter_wait(struct cpui cpu_pm_enter(); cpu_cluster_pm_enter(); + ct_idle_enter(); cpu_suspend(0, imx6sx_idle_finish); + ct_idle_exit(); cpu_cluster_pm_exit(); cpu_pm_exit(); @@ -87,7 +89,8 @@ static struct cpuidle_driver imx6sx_cpui */ .exit_latency = 300, .target_residency = 500, - .flags = CPUIDLE_FLAG_TIMER_STOP, + .flags = CPUIDLE_FLAG_TIMER_STOP | + CPUIDLE_FLAG_RCU_IDLE, .enter = imx6sx_enter_wait, .name = "LOW-POWER-IDLE", .desc = "ARM power off", From patchwork Thu Jan 12 19:43:23 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 641839 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 73A3AC71157 for ; Thu, 12 Jan 2023 20:04:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241187AbjALUDT (ORCPT ); Thu, 12 Jan 2023 15:03:19 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44232 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232542AbjALT7N (ORCPT ); Thu, 12 Jan 2023 14:59:13 -0500 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 48C8FD81; Thu, 12 Jan 2023 11:58:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=RrpmTujnodPvC1LE/jXScgO4ZKUrxiQVlZ4+SEf4m04=; b=Y8LFyBFl3JbIwtnCWjFL/hhR5y twnVLexiBK1ooMbeDatb6RWwBocZW13sf5pirkWAWAH1nsW2rgd7ecx2Gc/qOdtvY6YZxKvumRcTm amulB5kgeQbRdQF87cEBBGyv4iJlugiK9kXbD+c92ulURa+BZ+6IgO0Q1qr4EELRq9g05K3UaslzX AWK5oxOOelmKqL4CSrymA461jkib6Q12hrzk8J/XFrR76pcWqThQ8X70scSBkUeWz1SP2e4AHdemR 4sJ92NwETWbqsv5J5iWtGkWZGwcWClLra0VFFumQGPO8rMb8BpC/UsbZk6Ohp1wUq3mHnYc2/nqyR 7VPa7mnA==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1pG3hD-0045oC-0D; Thu, 12 Jan 2023 19:57:07 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 15BC73033FD; Thu, 12 Jan 2023 20:57:13 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id B27F62CCF1F50; Thu, 12 Jan 2023 20:57:07 +0100 (CET) Message-ID: <20230112195539.883561913@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:23 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 09/51] cpuidle,omap3: Push RCU-idle into driver References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Doing RCU-idle outside the driver, only to then teporarily enable it again before going idle is daft. Notably the cpu_pm_*() calls implicitly re-enable RCU for a bit. Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Frederic Weisbecker Reviewed-by: Tony Lindgren Acked-by: Rafael J. Wysocki Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- arch/arm/mach-omap2/cpuidle34xx.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) --- a/arch/arm/mach-omap2/cpuidle34xx.c +++ b/arch/arm/mach-omap2/cpuidle34xx.c @@ -133,7 +133,9 @@ static int omap3_enter_idle(struct cpuid } /* Execute ARM wfi */ + ct_idle_enter(); omap_sram_idle(); + ct_idle_exit(); /* * Call idle CPU PM enter notifier chain to restore @@ -265,6 +267,7 @@ static struct cpuidle_driver omap3_idle_ .owner = THIS_MODULE, .states = { { + .flags = CPUIDLE_FLAG_RCU_IDLE, .enter = omap3_enter_idle_bm, .exit_latency = 2 + 2, .target_residency = 5, @@ -272,6 +275,7 @@ static struct cpuidle_driver omap3_idle_ .desc = "MPU ON + CORE ON", }, { + .flags = CPUIDLE_FLAG_RCU_IDLE, .enter = omap3_enter_idle_bm, .exit_latency = 10 + 10, .target_residency = 30, @@ -279,6 +283,7 @@ static struct cpuidle_driver omap3_idle_ .desc = "MPU ON + CORE ON", }, { + .flags = CPUIDLE_FLAG_RCU_IDLE, .enter = omap3_enter_idle_bm, .exit_latency = 50 + 50, .target_residency = 300, @@ -286,6 +291,7 @@ static struct cpuidle_driver omap3_idle_ .desc = "MPU RET + CORE ON", }, { + .flags = CPUIDLE_FLAG_RCU_IDLE, .enter = omap3_enter_idle_bm, .exit_latency = 1500 + 1800, .target_residency = 4000, @@ -293,6 +299,7 @@ static struct cpuidle_driver omap3_idle_ .desc = "MPU OFF + CORE ON", }, { + .flags = CPUIDLE_FLAG_RCU_IDLE, .enter = omap3_enter_idle_bm, .exit_latency = 2500 + 7500, .target_residency = 12000, @@ -300,6 +307,7 @@ static struct cpuidle_driver omap3_idle_ .desc = "MPU RET + CORE RET", }, { + .flags = CPUIDLE_FLAG_RCU_IDLE, .enter = omap3_enter_idle_bm, .exit_latency = 3000 + 8500, .target_residency = 15000, @@ -307,6 +315,7 @@ static struct cpuidle_driver omap3_idle_ .desc = "MPU OFF + CORE RET", }, { + .flags = CPUIDLE_FLAG_RCU_IDLE, .enter = omap3_enter_idle_bm, .exit_latency = 10000 + 30000, .target_residency = 30000, @@ -328,6 +337,7 @@ static struct cpuidle_driver omap3430_id .owner = THIS_MODULE, .states = { { + .flags = CPUIDLE_FLAG_RCU_IDLE, .enter = omap3_enter_idle_bm, .exit_latency = 110 + 162, .target_residency = 5, @@ -335,6 +345,7 @@ static struct cpuidle_driver omap3430_id .desc = "MPU ON + CORE ON", }, { + .flags = CPUIDLE_FLAG_RCU_IDLE, .enter = omap3_enter_idle_bm, .exit_latency = 106 + 180, .target_residency = 309, @@ -342,6 +353,7 @@ static struct cpuidle_driver omap3430_id .desc = "MPU ON + CORE ON", }, { + .flags = CPUIDLE_FLAG_RCU_IDLE, .enter = omap3_enter_idle_bm, .exit_latency = 107 + 410, .target_residency = 46057, @@ -349,6 +361,7 @@ static struct cpuidle_driver omap3430_id .desc = "MPU RET + CORE ON", }, { + .flags = CPUIDLE_FLAG_RCU_IDLE, .enter = omap3_enter_idle_bm, .exit_latency = 121 + 3374, .target_residency = 46057, @@ -356,6 +369,7 @@ static struct cpuidle_driver omap3430_id .desc = "MPU OFF + CORE ON", }, { + .flags = CPUIDLE_FLAG_RCU_IDLE, .enter = omap3_enter_idle_bm, .exit_latency = 855 + 1146, .target_residency = 46057, @@ -363,6 +377,7 @@ static struct cpuidle_driver omap3430_id .desc = "MPU RET + CORE RET", }, { + .flags = CPUIDLE_FLAG_RCU_IDLE, .enter = omap3_enter_idle_bm, .exit_latency = 7580 + 4134, .target_residency = 484329, @@ -370,6 +385,7 @@ static struct cpuidle_driver omap3430_id .desc = "MPU OFF + CORE RET", }, { + .flags = CPUIDLE_FLAG_RCU_IDLE, .enter = omap3_enter_idle_bm, .exit_latency = 7505 + 15274, .target_residency = 484329, From patchwork Thu Jan 12 19:43:24 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 641846 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 142BAC76196 for ; Thu, 12 Jan 2023 20:04:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241438AbjALUD4 (ORCPT ); Thu, 12 Jan 2023 15:03:56 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44292 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233742AbjALT7S (ORCPT ); Thu, 12 Jan 2023 14:59:18 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BF01E21AB; Thu, 12 Jan 2023 11:58:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=OSWUMoytbsEQ8xUnxginHGtpoSP0fDdQQe/5yHesCdA=; b=oGTZFFogzTEIjb+QsTQkPVVvJ0 b7GMNlCztEuGtbxgFu+bAIaY8KyBinlaBTr45dKYTjFZ+qut+I64utBZgCErUSrDgHGazj0OLseHc LQY9tSMEF3WGmhbXemZLCLeqiQrFAPvVBy0+ZhAaCsiwkdfuUlDRQEErM4sweL3hHHTn744gXiuYU aRWLpMObRnFaccGIZfUWua4xa+Z/9GLJcl3acuzeRk1b04opm0hyjvLL4ERHCIYb0iCSdivXk+IHq pNw4HJPq+cg0MqSICIYKedF1IGlmuso9NREduYaTtT0pYa8fKPTzwh+BGjDGUMte1TCv0y/yiksmU V+bKLBzQ==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1pG3hY-005Ocb-88; Thu, 12 Jan 2023 19:57:28 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 18A663033FF; Thu, 12 Jan 2023 20:57:13 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id B69572CCF1F52; Thu, 12 Jan 2023 20:57:07 +0100 (CET) Message-ID: <20230112195539.946630819@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:24 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 10/51] cpuidle,armada: Push RCU-idle into driver References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Doing RCU-idle outside the driver, only to then temporarily enable it again before going idle is daft. Notably the cpu_pm_*() calls implicitly re-enable RCU for a bit. Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Frederic Weisbecker Acked-by: Rafael J. Wysocki Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- drivers/cpuidle/cpuidle-mvebu-v7.c | 7 +++++++ 1 file changed, 7 insertions(+) --- a/drivers/cpuidle/cpuidle-mvebu-v7.c +++ b/drivers/cpuidle/cpuidle-mvebu-v7.c @@ -36,7 +36,10 @@ static int mvebu_v7_enter_idle(struct cp if (drv->states[index].flags & MVEBU_V7_FLAG_DEEP_IDLE) deepidle = true; + ct_idle_enter(); ret = mvebu_v7_cpu_suspend(deepidle); + ct_idle_exit(); + cpu_pm_exit(); if (ret) @@ -49,6 +52,7 @@ static struct cpuidle_driver armadaxp_id .name = "armada_xp_idle", .states[0] = ARM_CPUIDLE_WFI_STATE, .states[1] = { + .flags = CPUIDLE_FLAG_RCU_IDLE, .enter = mvebu_v7_enter_idle, .exit_latency = 100, .power_usage = 50, @@ -57,6 +61,7 @@ static struct cpuidle_driver armadaxp_id .desc = "CPU power down", }, .states[2] = { + .flags = CPUIDLE_FLAG_RCU_IDLE, .enter = mvebu_v7_enter_idle, .exit_latency = 1000, .power_usage = 5, @@ -72,6 +77,7 @@ static struct cpuidle_driver armada370_i .name = "armada_370_idle", .states[0] = ARM_CPUIDLE_WFI_STATE, .states[1] = { + .flags = CPUIDLE_FLAG_RCU_IDLE, .enter = mvebu_v7_enter_idle, .exit_latency = 100, .power_usage = 5, @@ -87,6 +93,7 @@ static struct cpuidle_driver armada38x_i .name = "armada_38x_idle", .states[0] = ARM_CPUIDLE_WFI_STATE, .states[1] = { + .flags = CPUIDLE_FLAG_RCU_IDLE, .enter = mvebu_v7_enter_idle, .exit_latency = 10, .power_usage = 5, From patchwork Thu Jan 12 19:43:25 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 641840 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 04BCEC7EE26 for ; Thu, 12 Jan 2023 20:04:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241537AbjALUEJ (ORCPT ); Thu, 12 Jan 2023 15:04:09 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44230 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234111AbjALT7S (ORCPT ); Thu, 12 Jan 2023 14:59:18 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id ED63C25F0; Thu, 12 Jan 2023 11:58:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=CWtXQ9ScESvHC863qag21jQX+KK5xw/Ija2/01ku3yk=; b=EPZzE64m3oCXia+0wohNVHPJNI f4ZNUmyXPrJXWH7PL/wiKrgoxQtuCyfusu/y3sfTkworJKy8iifd1vPpHuP8cALb+9eexAF9i/bVo uujPfq/+tsg4qnvDB8OfG48pQXqBC3CNDcGcVnIOkcOltZ3//Ulq9Y9bpaRAZg+03QAYPkLcPO1s4 wONcCHCuHmLBFH0E7HMRRRMXZzsgmsm4f6hMvQuS12REPp2ZASTvrZVy/uINUGIc+agphKV1b+2yC JtrqWDPadPqhgKcTuFKtk4zf466ryZibze46GIPvhsYOTho1iX+RO3kAi0kCHINTSxmQEJ1fXTrIl AOBjoGlw==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1pG3hY-005Ocy-BO; Thu, 12 Jan 2023 19:57:28 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 1FD61303404; Thu, 12 Jan 2023 20:57:13 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id BAFC42CCF1F5C; Thu, 12 Jan 2023 20:57:07 +0100 (CET) Message-ID: <20230112195540.007918454@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:25 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 11/51] cpuidle,omap4: Push RCU-idle into driver References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Doing RCU-idle outside the driver, only to then temporarily enable it again, some *four* times, before going idle is daft. Notably three times explicitly using RCU_NONIDLE() and once implicitly through cpu_pm_*(). Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Frederic Weisbecker Reviewed-by: Tony Lindgren Acked-by: Rafael J. Wysocki Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- arch/arm/mach-omap2/cpuidle44xx.c | 29 ++++++++++++++++++----------- 1 file changed, 18 insertions(+), 11 deletions(-) --- a/arch/arm/mach-omap2/cpuidle44xx.c +++ b/arch/arm/mach-omap2/cpuidle44xx.c @@ -105,7 +105,9 @@ static int omap_enter_idle_smp(struct cp } raw_spin_unlock_irqrestore(&mpu_lock, flag); + ct_idle_enter(); omap4_enter_lowpower(dev->cpu, cx->cpu_state); + ct_idle_exit(); raw_spin_lock_irqsave(&mpu_lock, flag); if (cx->mpu_state_vote == num_online_cpus()) @@ -151,10 +153,10 @@ static int omap_enter_idle_coupled(struc (cx->mpu_logic_state == PWRDM_POWER_OFF); /* Enter broadcast mode for periodic timers */ - RCU_NONIDLE(tick_broadcast_enable()); + tick_broadcast_enable(); /* Enter broadcast mode for one-shot timers */ - RCU_NONIDLE(tick_broadcast_enter()); + tick_broadcast_enter(); /* * Call idle CPU PM enter notifier chain so that @@ -166,7 +168,7 @@ static int omap_enter_idle_coupled(struc if (dev->cpu == 0) { pwrdm_set_logic_retst(mpu_pd, cx->mpu_logic_state); - RCU_NONIDLE(omap_set_pwrdm_state(mpu_pd, cx->mpu_state)); + omap_set_pwrdm_state(mpu_pd, cx->mpu_state); /* * Call idle CPU cluster PM enter notifier chain @@ -178,14 +180,16 @@ static int omap_enter_idle_coupled(struc index = 0; cx = state_ptr + index; pwrdm_set_logic_retst(mpu_pd, cx->mpu_logic_state); - RCU_NONIDLE(omap_set_pwrdm_state(mpu_pd, cx->mpu_state)); + omap_set_pwrdm_state(mpu_pd, cx->mpu_state); mpuss_can_lose_context = 0; } } } + ct_idle_enter(); omap4_enter_lowpower(dev->cpu, cx->cpu_state); cpu_done[dev->cpu] = true; + ct_idle_exit(); /* Wakeup CPU1 only if it is not offlined */ if (dev->cpu == 0 && cpumask_test_cpu(1, cpu_online_mask)) { @@ -194,9 +198,9 @@ static int omap_enter_idle_coupled(struc mpuss_can_lose_context) gic_dist_disable(); - RCU_NONIDLE(clkdm_deny_idle(cpu_clkdm[1])); - RCU_NONIDLE(omap_set_pwrdm_state(cpu_pd[1], PWRDM_POWER_ON)); - RCU_NONIDLE(clkdm_allow_idle(cpu_clkdm[1])); + clkdm_deny_idle(cpu_clkdm[1]); + omap_set_pwrdm_state(cpu_pd[1], PWRDM_POWER_ON); + clkdm_allow_idle(cpu_clkdm[1]); if (IS_PM44XX_ERRATUM(PM_OMAP4_ROM_SMP_BOOT_ERRATUM_GICD) && mpuss_can_lose_context) { @@ -222,7 +226,7 @@ static int omap_enter_idle_coupled(struc cpu_pm_exit(); cpu_pm_out: - RCU_NONIDLE(tick_broadcast_exit()); + tick_broadcast_exit(); fail: cpuidle_coupled_parallel_barrier(dev, &abort_barrier); @@ -247,7 +251,8 @@ static struct cpuidle_driver omap4_idle_ /* C2 - CPU0 OFF + CPU1 OFF + MPU CSWR */ .exit_latency = 328 + 440, .target_residency = 960, - .flags = CPUIDLE_FLAG_COUPLED, + .flags = CPUIDLE_FLAG_COUPLED | + CPUIDLE_FLAG_RCU_IDLE, .enter = omap_enter_idle_coupled, .name = "C2", .desc = "CPUx OFF, MPUSS CSWR", @@ -256,7 +261,8 @@ static struct cpuidle_driver omap4_idle_ /* C3 - CPU0 OFF + CPU1 OFF + MPU OSWR */ .exit_latency = 460 + 518, .target_residency = 1100, - .flags = CPUIDLE_FLAG_COUPLED, + .flags = CPUIDLE_FLAG_COUPLED | + CPUIDLE_FLAG_RCU_IDLE, .enter = omap_enter_idle_coupled, .name = "C3", .desc = "CPUx OFF, MPUSS OSWR", @@ -282,7 +288,8 @@ static struct cpuidle_driver omap5_idle_ /* C2 - CPU0 RET + CPU1 RET + MPU CSWR */ .exit_latency = 48 + 60, .target_residency = 100, - .flags = CPUIDLE_FLAG_TIMER_STOP, + .flags = CPUIDLE_FLAG_TIMER_STOP | + CPUIDLE_FLAG_RCU_IDLE, .enter = omap_enter_idle_smp, .name = "C2", .desc = "CPUx CSWR, MPUSS CSWR", From patchwork Thu Jan 12 19:43:26 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 641853 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 74641C61DB3 for ; Thu, 12 Jan 2023 20:03:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241260AbjALUD1 (ORCPT ); Thu, 12 Jan 2023 15:03:27 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44228 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232500AbjALT7N (ORCPT ); Thu, 12 Jan 2023 14:59:13 -0500 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4DE0BDF5; Thu, 12 Jan 2023 11:58:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=NQmAgIg3861PdWRPD/+8zQmqygF5xIi/7qaj1X27QYY=; b=FKLIwXsLqSMTkfdrjYpRPs50iC /dZ8/rA7866IY1bP7MOMwGhQbwW0iJuXrxREmjWWzVcbzOSaZlDGTrUePB2nwarC2Yh1+X6s4N3V9 6cu76+LFHrZw0YNXmRxk7duxL9iqjz4iP0/30O/+/kXmWBYebdlus1yGQHEgBjwu8/3IhcMSjrE1/ 5igyOlZ7sKcztcJOY8on0ND65FJOhkbkvb0J6fFhWMzAqiflihKu/CriWYb93+MxlnQrAbdaq6Dkq GjWpP25XbP5Xvw0SdnOMreWPCRBsKKxhe+LwtJ+c/LTLhtbM/XP+ep478hFz3O2SEuR/27ZTMra+B xSlHMQYQ==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1pG3hD-0045oJ-2G; Thu, 12 Jan 2023 19:57:08 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 26A3330340D; Thu, 12 Jan 2023 20:57:13 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id BF3F52CCF1F5E; Thu, 12 Jan 2023 20:57:07 +0100 (CET) Message-ID: <20230112195540.068981667@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:26 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 12/51] cpuidle,dt: Push RCU-idle into driver References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Doing RCU-idle outside the driver, only to then temporarily enable it again before going idle is daft. Notably: this converts all dt_init_idle_driver() and __CPU_PM_CPU_IDLE_ENTER() users for they are inextrably intertwined. Signed-off-by: Peter Zijlstra (Intel) Acked-by: Rafael J. Wysocki Acked-by: Frederic Weisbecker Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- drivers/acpi/processor_idle.c | 2 ++ drivers/cpuidle/cpuidle-arm.c | 1 + drivers/cpuidle/cpuidle-big_little.c | 8 ++++++-- drivers/cpuidle/cpuidle-psci.c | 1 + drivers/cpuidle/cpuidle-qcom-spm.c | 1 + drivers/cpuidle/cpuidle-riscv-sbi.c | 1 + drivers/cpuidle/dt_idle_states.c | 2 +- include/linux/cpuidle.h | 2 ++ 8 files changed, 15 insertions(+), 3 deletions(-) --- a/drivers/acpi/processor_idle.c +++ b/drivers/acpi/processor_idle.c @@ -1219,6 +1219,8 @@ static int acpi_processor_setup_lpi_stat state->target_residency = lpi->min_residency; if (lpi->arch_flags) state->flags |= CPUIDLE_FLAG_TIMER_STOP; + if (i != 0 && lpi->entry_method == ACPI_CSTATE_FFH) + state->flags |= CPUIDLE_FLAG_RCU_IDLE; state->enter = acpi_idle_lpi_enter; drv->safe_state_index = i; } --- a/drivers/cpuidle/cpuidle-big_little.c +++ b/drivers/cpuidle/cpuidle-big_little.c @@ -64,7 +64,8 @@ static struct cpuidle_driver bl_idle_lit .enter = bl_enter_powerdown, .exit_latency = 700, .target_residency = 2500, - .flags = CPUIDLE_FLAG_TIMER_STOP, + .flags = CPUIDLE_FLAG_TIMER_STOP | + CPUIDLE_FLAG_RCU_IDLE, .name = "C1", .desc = "ARM little-cluster power down", }, @@ -85,7 +86,8 @@ static struct cpuidle_driver bl_idle_big .enter = bl_enter_powerdown, .exit_latency = 500, .target_residency = 2000, - .flags = CPUIDLE_FLAG_TIMER_STOP, + .flags = CPUIDLE_FLAG_TIMER_STOP | + CPUIDLE_FLAG_RCU_IDLE, .name = "C1", .desc = "ARM big-cluster power down", }, @@ -124,11 +126,13 @@ static int bl_enter_powerdown(struct cpu struct cpuidle_driver *drv, int idx) { cpu_pm_enter(); + ct_idle_enter(); cpu_suspend(0, bl_powerdown_finisher); /* signals the MCPM core that CPU is out of low power state */ mcpm_cpu_powered_up(); + ct_idle_exit(); cpu_pm_exit(); --- a/drivers/cpuidle/dt_idle_states.c +++ b/drivers/cpuidle/dt_idle_states.c @@ -77,7 +77,7 @@ static int init_state_node(struct cpuidl if (err) desc = state_node->name; - idle_state->flags = 0; + idle_state->flags = CPUIDLE_FLAG_RCU_IDLE; if (of_property_read_bool(state_node, "local-timer-stop")) idle_state->flags |= CPUIDLE_FLAG_TIMER_STOP; /* --- a/include/linux/cpuidle.h +++ b/include/linux/cpuidle.h @@ -289,7 +289,9 @@ extern s64 cpuidle_governor_latency_req( if (!is_retention) \ __ret = cpu_pm_enter(); \ if (!__ret) { \ + ct_idle_enter(); \ __ret = low_level_idle_enter(state); \ + ct_idle_exit(); \ if (!is_retention) \ cpu_pm_exit(); \ } \ From patchwork Thu Jan 12 19:43:27 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 641849 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 831DBC7113B for ; Thu, 12 Jan 2023 20:04:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241338AbjALUDl (ORCPT ); Thu, 12 Jan 2023 15:03:41 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44220 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232875AbjALT7P (ORCPT ); Thu, 12 Jan 2023 14:59:15 -0500 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6204BF02; Thu, 12 Jan 2023 11:58:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=U+TfVkp0QsADQiBGN/hq9wf1EsYpsa4vTkdZ0mLdl1k=; b=X3sYuy6fL3RqgKJT5/kyY/T0ww A4w/aGqBXYzbjq0ovUGzSiXSnwqu0hAP6aWbAx6EM9RQMixaeSFkTeMoq5Tp8g8+2xTyyfjh6NtMy mC6f71rhHNZc8yxzfzYNgVvDLSBEmfEe+153OuiRRLXriJ46cM5MvqvIC8SrpxxjzTew2zrO+fd+H yeusXlMUu35aUpqRVpXLv7cU+tiHfK7ZE9ipHRum1o7+Yb+riAOhBcycD9sPHIAzeWqFkY5/vtieb ve85chw+D6aD1ff3Jdui4CMF6z/ux8MH+wBBaRcv1NSj17Q08cT1A6MpfchKYVWU8r5TfnmKZG09P RV5gCBxw==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1pG3hD-0045oL-2T; Thu, 12 Jan 2023 19:57:08 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 2E054303410; Thu, 12 Jan 2023 20:57:13 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id C388F2CCF1F60; Thu, 12 Jan 2023 20:57:07 +0100 (CET) Message-ID: <20230112195540.130014793@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:27 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 13/51] cpuidle: Fix ct_idle_*() usage References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org The whole disable-RCU, enable-IRQS dance is very intricate since changing IRQ state is traced, which depends on RCU. Add two helpers for the cpuidle case that mirror the entry code. Signed-off-by: Peter Zijlstra (Intel) Acked-by: Rafael J. Wysocki Acked-by: Frederic Weisbecker Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- arch/arm/mach-imx/cpuidle-imx6q.c | 4 +-- arch/arm/mach-imx/cpuidle-imx6sx.c | 4 +-- arch/arm/mach-omap2/cpuidle34xx.c | 4 +-- arch/arm/mach-omap2/cpuidle44xx.c | 8 +++--- drivers/acpi/processor_idle.c | 8 ++++-- drivers/cpuidle/cpuidle-big_little.c | 4 +-- drivers/cpuidle/cpuidle-mvebu-v7.c | 4 +-- drivers/cpuidle/cpuidle-psci.c | 4 +-- drivers/cpuidle/cpuidle-riscv-sbi.c | 4 +-- drivers/cpuidle/cpuidle-tegra.c | 8 +++--- drivers/cpuidle/cpuidle.c | 11 ++++---- include/linux/clockchips.h | 4 +-- include/linux/cpuidle.h | 34 ++++++++++++++++++++++++-- kernel/sched/idle.c | 45 ++++++++++------------------------- kernel/time/tick-broadcast.c | 6 +++- 15 files changed, 86 insertions(+), 66 deletions(-) --- a/arch/arm/mach-imx/cpuidle-imx6q.c +++ b/arch/arm/mach-imx/cpuidle-imx6q.c @@ -25,9 +25,9 @@ static int imx6q_enter_wait(struct cpuid imx6_set_lpm(WAIT_UNCLOCKED); raw_spin_unlock(&cpuidle_lock); - ct_idle_enter(); + ct_cpuidle_enter(); cpu_do_idle(); - ct_idle_exit(); + ct_cpuidle_exit(); raw_spin_lock(&cpuidle_lock); if (num_idle_cpus-- == num_online_cpus()) --- a/arch/arm/mach-imx/cpuidle-imx6sx.c +++ b/arch/arm/mach-imx/cpuidle-imx6sx.c @@ -47,9 +47,9 @@ static int imx6sx_enter_wait(struct cpui cpu_pm_enter(); cpu_cluster_pm_enter(); - ct_idle_enter(); + ct_cpuidle_enter(); cpu_suspend(0, imx6sx_idle_finish); - ct_idle_exit(); + ct_cpuidle_exit(); cpu_cluster_pm_exit(); cpu_pm_exit(); --- a/arch/arm/mach-omap2/cpuidle34xx.c +++ b/arch/arm/mach-omap2/cpuidle34xx.c @@ -133,9 +133,9 @@ static int omap3_enter_idle(struct cpuid } /* Execute ARM wfi */ - ct_idle_enter(); + ct_cpuidle_enter(); omap_sram_idle(); - ct_idle_exit(); + ct_cpuidle_exit(); /* * Call idle CPU PM enter notifier chain to restore --- a/arch/arm/mach-omap2/cpuidle44xx.c +++ b/arch/arm/mach-omap2/cpuidle44xx.c @@ -105,9 +105,9 @@ static int omap_enter_idle_smp(struct cp } raw_spin_unlock_irqrestore(&mpu_lock, flag); - ct_idle_enter(); + ct_cpuidle_enter(); omap4_enter_lowpower(dev->cpu, cx->cpu_state); - ct_idle_exit(); + ct_cpuidle_exit(); raw_spin_lock_irqsave(&mpu_lock, flag); if (cx->mpu_state_vote == num_online_cpus()) @@ -186,10 +186,10 @@ static int omap_enter_idle_coupled(struc } } - ct_idle_enter(); + ct_cpuidle_enter(); omap4_enter_lowpower(dev->cpu, cx->cpu_state); cpu_done[dev->cpu] = true; - ct_idle_exit(); + ct_cpuidle_exit(); /* Wakeup CPU1 only if it is not offlined */ if (dev->cpu == 0 && cpumask_test_cpu(1, cpu_online_mask)) { --- a/drivers/acpi/processor_idle.c +++ b/drivers/acpi/processor_idle.c @@ -642,6 +642,8 @@ static int __cpuidle acpi_idle_enter_bm( */ bool dis_bm = pr->flags.bm_control; + instrumentation_begin(); + /* If we can skip BM, demote to a safe state. */ if (!cx->bm_sts_skip && acpi_idle_bm_check()) { dis_bm = false; @@ -663,11 +665,11 @@ static int __cpuidle acpi_idle_enter_bm( raw_spin_unlock(&c3_lock); } - ct_idle_enter(); + ct_cpuidle_enter(); acpi_idle_do_entry(cx); - ct_idle_exit(); + ct_cpuidle_exit(); /* Re-enable bus master arbitration */ if (dis_bm) { @@ -677,6 +679,8 @@ static int __cpuidle acpi_idle_enter_bm( raw_spin_unlock(&c3_lock); } + instrumentation_end(); + return index; } --- a/drivers/cpuidle/cpuidle-big_little.c +++ b/drivers/cpuidle/cpuidle-big_little.c @@ -126,13 +126,13 @@ static int bl_enter_powerdown(struct cpu struct cpuidle_driver *drv, int idx) { cpu_pm_enter(); - ct_idle_enter(); + ct_cpuidle_enter(); cpu_suspend(0, bl_powerdown_finisher); /* signals the MCPM core that CPU is out of low power state */ mcpm_cpu_powered_up(); - ct_idle_exit(); + ct_cpuidle_exit(); cpu_pm_exit(); --- a/drivers/cpuidle/cpuidle-mvebu-v7.c +++ b/drivers/cpuidle/cpuidle-mvebu-v7.c @@ -36,9 +36,9 @@ static int mvebu_v7_enter_idle(struct cp if (drv->states[index].flags & MVEBU_V7_FLAG_DEEP_IDLE) deepidle = true; - ct_idle_enter(); + ct_cpuidle_enter(); ret = mvebu_v7_cpu_suspend(deepidle); - ct_idle_exit(); + ct_cpuidle_exit(); cpu_pm_exit(); --- a/drivers/cpuidle/cpuidle-psci.c +++ b/drivers/cpuidle/cpuidle-psci.c @@ -74,7 +74,7 @@ static int __psci_enter_domain_idle_stat else pm_runtime_put_sync_suspend(pd_dev); - ct_idle_enter(); + ct_cpuidle_enter(); state = psci_get_domain_state(); if (!state) @@ -82,7 +82,7 @@ static int __psci_enter_domain_idle_stat ret = psci_cpu_suspend_enter(state) ? -1 : idx; - ct_idle_exit(); + ct_cpuidle_exit(); if (s2idle) dev_pm_genpd_resume(pd_dev); --- a/drivers/cpuidle/cpuidle-riscv-sbi.c +++ b/drivers/cpuidle/cpuidle-riscv-sbi.c @@ -126,7 +126,7 @@ static int __sbi_enter_domain_idle_state else pm_runtime_put_sync_suspend(pd_dev); - ct_idle_enter(); + ct_cpuidle_enter(); if (sbi_is_domain_state_available()) state = sbi_get_domain_state(); @@ -135,7 +135,7 @@ static int __sbi_enter_domain_idle_state ret = sbi_suspend(state) ? -1 : idx; - ct_idle_exit(); + ct_cpuidle_exit(); if (s2idle) dev_pm_genpd_resume(pd_dev); --- a/drivers/cpuidle/cpuidle-tegra.c +++ b/drivers/cpuidle/cpuidle-tegra.c @@ -183,7 +183,7 @@ static int tegra_cpuidle_state_enter(str tegra_pm_set_cpu_in_lp2(); cpu_pm_enter(); - ct_idle_enter(); + ct_cpuidle_enter(); switch (index) { case TEGRA_C7: @@ -199,7 +199,7 @@ static int tegra_cpuidle_state_enter(str break; } - ct_idle_exit(); + ct_cpuidle_exit(); cpu_pm_exit(); tegra_pm_clear_cpu_in_lp2(); @@ -240,10 +240,10 @@ static int tegra_cpuidle_enter(struct cp if (index == TEGRA_C1) { if (do_rcu) - ct_idle_enter(); + ct_cpuidle_enter(); ret = arm_cpuidle_simple_enter(dev, drv, index); if (do_rcu) - ct_idle_exit(); + ct_cpuidle_exit(); } else ret = tegra_cpuidle_state_enter(dev, index, cpu); --- a/drivers/cpuidle/cpuidle.c +++ b/drivers/cpuidle/cpuidle.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include #include @@ -152,12 +153,12 @@ static void enter_s2idle_proper(struct c */ stop_critical_timings(); if (!(target_state->flags & CPUIDLE_FLAG_RCU_IDLE)) - ct_idle_enter(); + ct_cpuidle_enter(); target_state->enter_s2idle(dev, drv, index); if (WARN_ON_ONCE(!irqs_disabled())) - local_irq_disable(); + raw_local_irq_disable(); if (!(target_state->flags & CPUIDLE_FLAG_RCU_IDLE)) - ct_idle_exit(); + ct_cpuidle_exit(); tick_unfreeze(); start_critical_timings(); @@ -235,14 +236,14 @@ int cpuidle_enter_state(struct cpuidle_d stop_critical_timings(); if (!(target_state->flags & CPUIDLE_FLAG_RCU_IDLE)) - ct_idle_enter(); + ct_cpuidle_enter(); entered_state = target_state->enter(dev, drv, index); if (WARN_ONCE(!irqs_disabled(), "%ps leaked IRQ state", target_state->enter)) raw_local_irq_disable(); if (!(target_state->flags & CPUIDLE_FLAG_RCU_IDLE)) - ct_idle_exit(); + ct_cpuidle_exit(); start_critical_timings(); sched_clock_idle_wakeup_event(); --- a/include/linux/clockchips.h +++ b/include/linux/clockchips.h @@ -211,7 +211,7 @@ extern int tick_receive_broadcast(void); extern void tick_setup_hrtimer_broadcast(void); extern int tick_check_broadcast_expired(void); # else -static inline int tick_check_broadcast_expired(void) { return 0; } +static __always_inline int tick_check_broadcast_expired(void) { return 0; } static inline void tick_setup_hrtimer_broadcast(void) { } # endif @@ -219,7 +219,7 @@ static inline void tick_setup_hrtimer_br static inline void clockevents_suspend(void) { } static inline void clockevents_resume(void) { } -static inline int tick_check_broadcast_expired(void) { return 0; } +static __always_inline int tick_check_broadcast_expired(void) { return 0; } static inline void tick_setup_hrtimer_broadcast(void) { } #endif /* !CONFIG_GENERIC_CLOCKEVENTS */ --- a/include/linux/cpuidle.h +++ b/include/linux/cpuidle.h @@ -14,6 +14,7 @@ #include #include #include +#include #define CPUIDLE_STATE_MAX 10 #define CPUIDLE_NAME_LEN 16 @@ -115,6 +116,35 @@ struct cpuidle_device { DECLARE_PER_CPU(struct cpuidle_device *, cpuidle_devices); DECLARE_PER_CPU(struct cpuidle_device, cpuidle_dev); +static __always_inline void ct_cpuidle_enter(void) +{ + lockdep_assert_irqs_disabled(); + /* + * Idle is allowed to (temporary) enable IRQs. It + * will return with IRQs disabled. + * + * Trace IRQs enable here, then switch off RCU, and have + * arch_cpu_idle() use raw_local_irq_enable(). Note that + * ct_idle_enter() relies on lockdep IRQ state, so switch that + * last -- this is very similar to the entry code. + */ + trace_hardirqs_on_prepare(); + lockdep_hardirqs_on_prepare(); + instrumentation_end(); + ct_idle_enter(); + lockdep_hardirqs_on(_RET_IP_); +} + +static __always_inline void ct_cpuidle_exit(void) +{ + /* + * Carefully undo the above. + */ + lockdep_hardirqs_off(_RET_IP_); + ct_idle_exit(); + instrumentation_begin(); +} + /**************************** * CPUIDLE DRIVER INTERFACE * ****************************/ @@ -289,9 +319,9 @@ extern s64 cpuidle_governor_latency_req( if (!is_retention) \ __ret = cpu_pm_enter(); \ if (!__ret) { \ - ct_idle_enter(); \ + ct_cpuidle_enter(); \ __ret = low_level_idle_enter(state); \ - ct_idle_exit(); \ + ct_cpuidle_exit(); \ if (!is_retention) \ cpu_pm_exit(); \ } \ --- a/kernel/sched/idle.c +++ b/kernel/sched/idle.c @@ -51,18 +51,22 @@ __setup("hlt", cpu_idle_nopoll_setup); static noinline int __cpuidle cpu_idle_poll(void) { + instrumentation_begin(); trace_cpu_idle(0, smp_processor_id()); stop_critical_timings(); - ct_idle_enter(); - local_irq_enable(); + ct_cpuidle_enter(); + raw_local_irq_enable(); while (!tif_need_resched() && (cpu_idle_force_poll || tick_check_broadcast_expired())) cpu_relax(); + raw_local_irq_disable(); - ct_idle_exit(); + ct_cpuidle_exit(); start_critical_timings(); trace_cpu_idle(PWR_EVENT_EXIT, smp_processor_id()); + local_irq_enable(); + instrumentation_end(); return 1; } @@ -85,44 +89,21 @@ void __weak arch_cpu_idle(void) */ void __cpuidle default_idle_call(void) { - if (current_clr_polling_and_test()) { - local_irq_enable(); - } else { - + instrumentation_begin(); + if (!current_clr_polling_and_test()) { trace_cpu_idle(1, smp_processor_id()); stop_critical_timings(); - /* - * arch_cpu_idle() is supposed to enable IRQs, however - * we can't do that because of RCU and tracing. - * - * Trace IRQs enable here, then switch off RCU, and have - * arch_cpu_idle() use raw_local_irq_enable(). Note that - * ct_idle_enter() relies on lockdep IRQ state, so switch that - * last -- this is very similar to the entry code. - */ - trace_hardirqs_on_prepare(); - lockdep_hardirqs_on_prepare(); - ct_idle_enter(); - lockdep_hardirqs_on(_THIS_IP_); - + ct_cpuidle_enter(); arch_cpu_idle(); - - /* - * OK, so IRQs are enabled here, but RCU needs them disabled to - * turn itself back on.. funny thing is that disabling IRQs - * will cause tracing, which needs RCU. Jump through hoops to - * make it 'work'. - */ raw_local_irq_disable(); - lockdep_hardirqs_off(_THIS_IP_); - ct_idle_exit(); - lockdep_hardirqs_on(_THIS_IP_); - raw_local_irq_enable(); + ct_cpuidle_exit(); start_critical_timings(); trace_cpu_idle(PWR_EVENT_EXIT, smp_processor_id()); } + local_irq_enable(); + instrumentation_end(); } static int call_cpuidle_s2idle(struct cpuidle_driver *drv, --- a/kernel/time/tick-broadcast.c +++ b/kernel/time/tick-broadcast.c @@ -622,9 +622,13 @@ struct cpumask *tick_get_broadcast_onesh * to avoid a deep idle transition as we are about to get the * broadcast IPI right away. */ -int tick_check_broadcast_expired(void) +noinstr int tick_check_broadcast_expired(void) { +#ifdef _ASM_GENERIC_BITOPS_INSTRUMENTED_NON_ATOMIC_H + return arch_test_bit(smp_processor_id(), cpumask_bits(tick_broadcast_force_mask)); +#else return cpumask_test_cpu(smp_processor_id(), tick_broadcast_force_mask); +#endif } /* From patchwork Thu Jan 12 19:43:28 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 641856 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DAF65C678D8 for ; Thu, 12 Jan 2023 20:03:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241208AbjALUDV (ORCPT ); Thu, 12 Jan 2023 15:03:21 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44158 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233589AbjALT7R (ORCPT ); Thu, 12 Jan 2023 14:59:17 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9219F200F; Thu, 12 Jan 2023 11:58:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=iAxp8x4lKKvpjseCn+ZLFQYojoG8LdH6O7HFdGbhL8c=; b=iB4zaU8acs4mdnCux/EhppaQnv fuEmLrend3HPuirTdd/bJ6G2nd+qGUpzlOBN9jlFeSeuQKbBH6cQLTCvznJAHfabcUQGPp9nxQjD/ u7GZnLG4RzmJkwXIn45CcA+9MzmOH8JDUVilxTB0EPSu9kQdxCsgzCifhTjyJwfv8ovorx7TNrhni NotEMkq0qKb0ZSzE61psyjeh2Pw3ACUfX/V9vkQyxkXKopKQ0ecpOoBwaz2H9qUkou15Fq32IqZAG o0gf3BKIJpVKs4Wi8RUevw7dyWIqj59cgCi096mvXcRWq2W6t4MotfjNMPm9/CINltllAxWqo3PjI eGUKQklw==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1pG3hZ-005OdW-32; Thu, 12 Jan 2023 19:57:29 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 370B4303413; Thu, 12 Jan 2023 20:57:13 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id CBBB02CCF1F6D; Thu, 12 Jan 2023 20:57:07 +0100 (CET) Message-ID: <20230112195540.190860672@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:28 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, Ulf Hansson , "Rafael J. Wysocki" Subject: [PATCH v3 14/51] cpuidle,cpu_pm: Remove RCU fiddling from cpu_pm_{enter,exit}() References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org All callers should still have RCU enabled. Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Ulf Hansson Acked-by: Mark Rutland Acked-by: Rafael J. Wysocki Acked-by: Frederic Weisbecker Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- kernel/cpu_pm.c | 9 --------- 1 file changed, 9 deletions(-) --- a/kernel/cpu_pm.c +++ b/kernel/cpu_pm.c @@ -30,16 +30,9 @@ static int cpu_pm_notify(enum cpu_pm_eve { int ret; - /* - * This introduces a RCU read critical section, which could be - * disfunctional in cpu idle. Copy RCU_NONIDLE code to let RCU know - * this. - */ - ct_irq_enter_irqson(); rcu_read_lock(); ret = raw_notifier_call_chain(&cpu_pm_notifier.chain, event, NULL); rcu_read_unlock(); - ct_irq_exit_irqson(); return notifier_to_errno(ret); } @@ -49,11 +42,9 @@ static int cpu_pm_notify_robust(enum cpu unsigned long flags; int ret; - ct_irq_enter_irqson(); raw_spin_lock_irqsave(&cpu_pm_notifier.lock, flags); ret = raw_notifier_call_chain_robust(&cpu_pm_notifier.chain, event_up, event_down, NULL); raw_spin_unlock_irqrestore(&cpu_pm_notifier.lock, flags); - ct_irq_exit_irqson(); return notifier_to_errno(ret); } From patchwork Thu Jan 12 19:43:29 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 641861 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B279BC61DB3 for ; Thu, 12 Jan 2023 20:02:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241076AbjALUCv (ORCPT ); Thu, 12 Jan 2023 15:02:51 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44308 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235408AbjALT7T (ORCPT ); Thu, 12 Jan 2023 14:59:19 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 914CE2BEB; Thu, 12 Jan 2023 11:58:09 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=N/LoJ6QokuvkgqrdUyeUyAC9uk5r3NGpRlHTjN0UEk8=; b=T8OnHc73dEliAoWK/xch6i2J7U UMPcH7C3wey9SZCz29M3TnVGeV/W9jC6hfvxLiKRMqnquFKPM6nid5EbmG5dczPvuD2DZ3rsJb8bh 1B5YEftBb1n98ERVSHO05+IatfdS4u87KvvQGiPoj8rifuEdsA4srZC4wIENwPRAVZsXaUzY4luW4 Zenh892eKzf2pgbhojQV6wJdtmIWgpRiTZY36OvBCfqI5tc8YiwERNFtaxcfar59LGMt3V5FwEWxd 1IYeXc/xNHpxnwh58Sqsesvu7xJ/zUZBM+XUWlSRPervhZPQ3w6Fk9QTn2mJpsRI+pQDUPSrD9z7J 4u6HFEyw==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1pG3hZ-005OdZ-8g; Thu, 12 Jan 2023 19:57:29 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 3E001303416; Thu, 12 Jan 2023 20:57:13 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id D46292CCF1F75; Thu, 12 Jan 2023 20:57:07 +0100 (CET) Message-ID: <20230112195540.251666856@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:29 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 15/51] acpi_idle: Remove tracing References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org All the idle routines are called with RCU disabled, as such there must not be any tracing inside. While there; clean-up the io-port idle thing. Signed-off-by: Peter Zijlstra (Intel) Acked-by: Rafael J. Wysocki Acked-by: Frederic Weisbecker Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- drivers/acpi/processor_idle.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) --- a/drivers/acpi/processor_idle.c +++ b/drivers/acpi/processor_idle.c @@ -109,8 +109,8 @@ static const struct dmi_system_id proces static void __cpuidle acpi_safe_halt(void) { if (!tif_need_resched()) { - safe_halt(); - local_irq_disable(); + raw_safe_halt(); + raw_local_irq_disable(); } } @@ -525,8 +525,11 @@ static int acpi_idle_bm_check(void) return bm_status; } -static void wait_for_freeze(void) +static __cpuidle void io_idle(unsigned long addr) { + /* IO port based C-state */ + inb(addr); + #ifdef CONFIG_X86 /* No delay is needed if we are in guest */ if (boot_cpu_has(X86_FEATURE_HYPERVISOR)) @@ -571,9 +574,7 @@ static void __cpuidle acpi_idle_do_entry } else if (cx->entry_method == ACPI_CSTATE_HALT) { acpi_safe_halt(); } else { - /* IO port based C-state */ - inb(cx->address); - wait_for_freeze(); + io_idle(cx->address); } perf_lopwr_cb(false); @@ -595,8 +596,7 @@ static int acpi_idle_play_dead(struct cp if (cx->entry_method == ACPI_CSTATE_HALT) safe_halt(); else if (cx->entry_method == ACPI_CSTATE_SYSTEMIO) { - inb(cx->address); - wait_for_freeze(); + io_idle(cx->address); } else return -ENODEV; From patchwork Thu Jan 12 19:43:30 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 642468 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8ED38C71143 for ; Thu, 12 Jan 2023 20:03:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241267AbjALUD1 (ORCPT ); Thu, 12 Jan 2023 15:03:27 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44314 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237088AbjALT7U (ORCPT ); Thu, 12 Jan 2023 14:59:20 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 80F252DDA; Thu, 12 Jan 2023 11:58:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=1NaK9G2/I/OTlb13IaE2Tqn3F/yijw+kp1Wy55f7+Ak=; b=d9VgDAL2fWp2M2wxA7J9NgpFTT 2pG2qOlYmRDNCuzGSRUBqoo9hMDtSgVzgVID6gFby7pOIrlbQNFtimg6GKmL90aKS1vg2lYRpe6E6 S50bRd4JCG17JCzCaWBBkWkX3v2Clfdjl01hTLfMxi/Kdtf8TxtDe2XST56gTJTH8NeJMqeihArR8 XcEZk4Z/I8fpUGsOtTlAneoT7X5OaEcAPvRQEER0lr8m6A3mwQn1+QXc8ME5pao1f5nnwssK44DRU EUlFxQhJpcHlwX2ret9+B92moOLu8UBxS4OPT7RcvdlONjNMGjsPHDbl2769rXFicjenGXiSAmJvx Q+I8zi6w==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1pG3hZ-005Odc-MG; Thu, 12 Jan 2023 19:57:29 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 4894230341A; Thu, 12 Jan 2023 20:57:13 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id DAA122CCF1F62; Thu, 12 Jan 2023 20:57:07 +0100 (CET) Message-ID: <20230112195540.312601331@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:30 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 16/51] cpuidle: Annotate poll_idle() References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org The __cpuidle functions will become a noinstr class, as such they need explicit annotations. Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Rafael J. Wysocki Acked-by: Frederic Weisbecker Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- drivers/cpuidle/poll_state.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) --- a/drivers/cpuidle/poll_state.c +++ b/drivers/cpuidle/poll_state.c @@ -13,7 +13,10 @@ static int __cpuidle poll_idle(struct cpuidle_device *dev, struct cpuidle_driver *drv, int index) { - u64 time_start = local_clock(); + u64 time_start; + + instrumentation_begin(); + time_start = local_clock(); dev->poll_time_limit = false; @@ -39,6 +42,7 @@ static int __cpuidle poll_idle(struct cp raw_local_irq_disable(); current_clr_polling(); + instrumentation_end(); return index; } From patchwork Thu Jan 12 19:43:31 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 642458 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 61DFDC77B6D for ; Thu, 12 Jan 2023 20:04:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241450AbjALUD5 (ORCPT ); Thu, 12 Jan 2023 15:03:57 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44282 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233504AbjALT7Q (ORCPT ); Thu, 12 Jan 2023 14:59:16 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4765610C2; Thu, 12 Jan 2023 11:58:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=A36GBNDeZcYlVC8rkRiSg7Fkb66ciqPmteGiazOXnKo=; b=f8TroYQijIlc9MuWlP4LwBLqev fPz8ciZ+SdwGgd+2dJNYnnpQQfPyL98wQLCxEdxcxA7jXGonUiF59Vm/+fX/v7qM8g5FLUmOTcYTd hqPpoLIDep8jXNb4QI+vppOcG4nANADValU324FWAQyr0xAZKKscT0Fj8Jrh7UyUfLwpsYnsOEWNz eQRPSdLyPwoJR6DYI9crm2nvFg9liwcgMxc46hAGZACQUxHgHL8kM0Lc1lLwF9174dIfxotwuNWx0 KkzVpLQtlnyo1ad4E13LtdvMggDa3/MeFTlRbijDXhqwH1GQuZNTKtNRZ9gryMA3HVyhHm3enhGOO s4VYrYww==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1pG3hZ-005Odk-U3; Thu, 12 Jan 2023 19:57:30 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 5088930341D; Thu, 12 Jan 2023 20:57:13 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id DFC6A2CCF1F66; Thu, 12 Jan 2023 20:57:07 +0100 (CET) Message-ID: <20230112195540.373461409@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:31 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 17/51] objtool/idle: Validate __cpuidle code as noinstr References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Idle code is very like entry code in that RCU isn't available. As such, add a little validation. Signed-off-by: Peter Zijlstra (Intel) Acked-by: Geert Uytterhoeven Acked-by: Rafael J. Wysocki Acked-by: Frederic Weisbecker Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- arch/alpha/kernel/vmlinux.lds.S | 1 - arch/arc/kernel/vmlinux.lds.S | 1 - arch/arm/include/asm/vmlinux.lds.h | 1 - arch/arm64/kernel/vmlinux.lds.S | 1 - arch/csky/kernel/vmlinux.lds.S | 1 - arch/hexagon/kernel/vmlinux.lds.S | 1 - arch/ia64/kernel/vmlinux.lds.S | 1 - arch/loongarch/kernel/vmlinux.lds.S | 1 - arch/m68k/kernel/vmlinux-nommu.lds | 1 - arch/m68k/kernel/vmlinux-std.lds | 1 - arch/m68k/kernel/vmlinux-sun3.lds | 1 - arch/microblaze/kernel/vmlinux.lds.S | 1 - arch/mips/kernel/vmlinux.lds.S | 1 - arch/nios2/kernel/vmlinux.lds.S | 1 - arch/openrisc/kernel/vmlinux.lds.S | 1 - arch/parisc/kernel/vmlinux.lds.S | 1 - arch/powerpc/kernel/vmlinux.lds.S | 1 - arch/riscv/kernel/vmlinux-xip.lds.S | 1 - arch/riscv/kernel/vmlinux.lds.S | 1 - arch/s390/kernel/vmlinux.lds.S | 1 - arch/sh/kernel/vmlinux.lds.S | 1 - arch/sparc/kernel/vmlinux.lds.S | 1 - arch/um/kernel/dyn.lds.S | 1 - arch/um/kernel/uml.lds.S | 1 - arch/x86/include/asm/irqflags.h | 11 ++++------- arch/x86/include/asm/mwait.h | 2 +- arch/x86/kernel/vmlinux.lds.S | 1 - arch/xtensa/kernel/vmlinux.lds.S | 1 - include/asm-generic/vmlinux.lds.h | 9 +++------ include/linux/compiler_types.h | 8 ++++++-- include/linux/cpu.h | 3 --- tools/objtool/check.c | 13 +++++++++++++ 32 files changed, 27 insertions(+), 45 deletions(-) --- a/arch/alpha/kernel/vmlinux.lds.S +++ b/arch/alpha/kernel/vmlinux.lds.S @@ -27,7 +27,6 @@ SECTIONS HEAD_TEXT TEXT_TEXT SCHED_TEXT - CPUIDLE_TEXT LOCK_TEXT *(.fixup) *(.gnu.warning) --- a/arch/arc/kernel/vmlinux.lds.S +++ b/arch/arc/kernel/vmlinux.lds.S @@ -85,7 +85,6 @@ SECTIONS _stext = .; TEXT_TEXT SCHED_TEXT - CPUIDLE_TEXT LOCK_TEXT KPROBES_TEXT IRQENTRY_TEXT --- a/arch/arm/include/asm/vmlinux.lds.h +++ b/arch/arm/include/asm/vmlinux.lds.h @@ -96,7 +96,6 @@ SOFTIRQENTRY_TEXT \ TEXT_TEXT \ SCHED_TEXT \ - CPUIDLE_TEXT \ LOCK_TEXT \ KPROBES_TEXT \ ARM_STUBS_TEXT \ --- a/arch/arm64/kernel/vmlinux.lds.S +++ b/arch/arm64/kernel/vmlinux.lds.S @@ -175,7 +175,6 @@ SECTIONS ENTRY_TEXT TEXT_TEXT SCHED_TEXT - CPUIDLE_TEXT LOCK_TEXT KPROBES_TEXT HYPERVISOR_TEXT --- a/arch/csky/kernel/vmlinux.lds.S +++ b/arch/csky/kernel/vmlinux.lds.S @@ -34,7 +34,6 @@ SECTIONS SOFTIRQENTRY_TEXT TEXT_TEXT SCHED_TEXT - CPUIDLE_TEXT LOCK_TEXT KPROBES_TEXT *(.fixup) --- a/arch/hexagon/kernel/vmlinux.lds.S +++ b/arch/hexagon/kernel/vmlinux.lds.S @@ -41,7 +41,6 @@ SECTIONS IRQENTRY_TEXT SOFTIRQENTRY_TEXT SCHED_TEXT - CPUIDLE_TEXT LOCK_TEXT KPROBES_TEXT *(.fixup) --- a/arch/ia64/kernel/vmlinux.lds.S +++ b/arch/ia64/kernel/vmlinux.lds.S @@ -51,7 +51,6 @@ SECTIONS { __end_ivt_text = .; TEXT_TEXT SCHED_TEXT - CPUIDLE_TEXT LOCK_TEXT KPROBES_TEXT IRQENTRY_TEXT --- a/arch/loongarch/kernel/vmlinux.lds.S +++ b/arch/loongarch/kernel/vmlinux.lds.S @@ -42,7 +42,6 @@ SECTIONS .text : { TEXT_TEXT SCHED_TEXT - CPUIDLE_TEXT LOCK_TEXT KPROBES_TEXT IRQENTRY_TEXT --- a/arch/m68k/kernel/vmlinux-nommu.lds +++ b/arch/m68k/kernel/vmlinux-nommu.lds @@ -48,7 +48,6 @@ SECTIONS { IRQENTRY_TEXT SOFTIRQENTRY_TEXT SCHED_TEXT - CPUIDLE_TEXT LOCK_TEXT *(.fixup) . = ALIGN(16); --- a/arch/m68k/kernel/vmlinux-std.lds +++ b/arch/m68k/kernel/vmlinux-std.lds @@ -19,7 +19,6 @@ SECTIONS IRQENTRY_TEXT SOFTIRQENTRY_TEXT SCHED_TEXT - CPUIDLE_TEXT LOCK_TEXT *(.fixup) *(.gnu.warning) --- a/arch/m68k/kernel/vmlinux-sun3.lds +++ b/arch/m68k/kernel/vmlinux-sun3.lds @@ -19,7 +19,6 @@ SECTIONS IRQENTRY_TEXT SOFTIRQENTRY_TEXT SCHED_TEXT - CPUIDLE_TEXT LOCK_TEXT *(.fixup) *(.gnu.warning) --- a/arch/microblaze/kernel/vmlinux.lds.S +++ b/arch/microblaze/kernel/vmlinux.lds.S @@ -36,7 +36,6 @@ SECTIONS { EXIT_TEXT EXIT_CALL SCHED_TEXT - CPUIDLE_TEXT LOCK_TEXT KPROBES_TEXT IRQENTRY_TEXT --- a/arch/mips/kernel/vmlinux.lds.S +++ b/arch/mips/kernel/vmlinux.lds.S @@ -61,7 +61,6 @@ SECTIONS .text : { TEXT_TEXT SCHED_TEXT - CPUIDLE_TEXT LOCK_TEXT KPROBES_TEXT IRQENTRY_TEXT --- a/arch/nios2/kernel/vmlinux.lds.S +++ b/arch/nios2/kernel/vmlinux.lds.S @@ -24,7 +24,6 @@ SECTIONS .text : { TEXT_TEXT SCHED_TEXT - CPUIDLE_TEXT LOCK_TEXT IRQENTRY_TEXT SOFTIRQENTRY_TEXT --- a/arch/openrisc/kernel/vmlinux.lds.S +++ b/arch/openrisc/kernel/vmlinux.lds.S @@ -52,7 +52,6 @@ SECTIONS _stext = .; TEXT_TEXT SCHED_TEXT - CPUIDLE_TEXT LOCK_TEXT KPROBES_TEXT IRQENTRY_TEXT --- a/arch/parisc/kernel/vmlinux.lds.S +++ b/arch/parisc/kernel/vmlinux.lds.S @@ -86,7 +86,6 @@ SECTIONS TEXT_TEXT LOCK_TEXT SCHED_TEXT - CPUIDLE_TEXT KPROBES_TEXT IRQENTRY_TEXT SOFTIRQENTRY_TEXT --- a/arch/powerpc/kernel/vmlinux.lds.S +++ b/arch/powerpc/kernel/vmlinux.lds.S @@ -111,7 +111,6 @@ SECTIONS #endif NOINSTR_TEXT SCHED_TEXT - CPUIDLE_TEXT LOCK_TEXT KPROBES_TEXT IRQENTRY_TEXT --- a/arch/riscv/kernel/vmlinux-xip.lds.S +++ b/arch/riscv/kernel/vmlinux-xip.lds.S @@ -39,7 +39,6 @@ SECTIONS _stext = .; TEXT_TEXT SCHED_TEXT - CPUIDLE_TEXT LOCK_TEXT KPROBES_TEXT ENTRY_TEXT --- a/arch/riscv/kernel/vmlinux.lds.S +++ b/arch/riscv/kernel/vmlinux.lds.S @@ -42,7 +42,6 @@ SECTIONS _stext = .; TEXT_TEXT SCHED_TEXT - CPUIDLE_TEXT LOCK_TEXT KPROBES_TEXT ENTRY_TEXT --- a/arch/s390/kernel/vmlinux.lds.S +++ b/arch/s390/kernel/vmlinux.lds.S @@ -42,7 +42,6 @@ SECTIONS HEAD_TEXT TEXT_TEXT SCHED_TEXT - CPUIDLE_TEXT LOCK_TEXT KPROBES_TEXT IRQENTRY_TEXT --- a/arch/sh/kernel/vmlinux.lds.S +++ b/arch/sh/kernel/vmlinux.lds.S @@ -29,7 +29,6 @@ SECTIONS HEAD_TEXT TEXT_TEXT SCHED_TEXT - CPUIDLE_TEXT LOCK_TEXT KPROBES_TEXT IRQENTRY_TEXT --- a/arch/sparc/kernel/vmlinux.lds.S +++ b/arch/sparc/kernel/vmlinux.lds.S @@ -50,7 +50,6 @@ SECTIONS HEAD_TEXT TEXT_TEXT SCHED_TEXT - CPUIDLE_TEXT LOCK_TEXT KPROBES_TEXT IRQENTRY_TEXT --- a/arch/um/kernel/dyn.lds.S +++ b/arch/um/kernel/dyn.lds.S @@ -74,7 +74,6 @@ SECTIONS _stext = .; TEXT_TEXT SCHED_TEXT - CPUIDLE_TEXT LOCK_TEXT IRQENTRY_TEXT SOFTIRQENTRY_TEXT --- a/arch/um/kernel/uml.lds.S +++ b/arch/um/kernel/uml.lds.S @@ -35,7 +35,6 @@ SECTIONS _stext = .; TEXT_TEXT SCHED_TEXT - CPUIDLE_TEXT LOCK_TEXT IRQENTRY_TEXT SOFTIRQENTRY_TEXT --- a/arch/x86/include/asm/irqflags.h +++ b/arch/x86/include/asm/irqflags.h @@ -8,9 +8,6 @@ #include -/* Provide __cpuidle; we can't safely include */ -#define __cpuidle __section(".cpuidle.text") - /* * Interrupt control: */ @@ -45,13 +42,13 @@ static __always_inline void native_irq_e asm volatile("sti": : :"memory"); } -static inline __cpuidle void native_safe_halt(void) +static __always_inline void native_safe_halt(void) { mds_idle_clear_cpu_buffers(); asm volatile("sti; hlt": : :"memory"); } -static inline __cpuidle void native_halt(void) +static __always_inline void native_halt(void) { mds_idle_clear_cpu_buffers(); asm volatile("hlt": : :"memory"); @@ -84,7 +81,7 @@ static __always_inline void arch_local_i * Used in the idle loop; sti takes one instruction cycle * to complete: */ -static inline __cpuidle void arch_safe_halt(void) +static __always_inline void arch_safe_halt(void) { native_safe_halt(); } @@ -93,7 +90,7 @@ static inline __cpuidle void arch_safe_h * Used when interrupts are already enabled or to * shutdown the processor: */ -static inline __cpuidle void halt(void) +static __always_inline void halt(void) { native_halt(); } --- a/arch/x86/include/asm/mwait.h +++ b/arch/x86/include/asm/mwait.h @@ -105,7 +105,7 @@ static inline void __sti_mwait(unsigned * New with Core Duo processors, MWAIT can take some hints based on CPU * capability. */ -static inline void mwait_idle_with_hints(unsigned long eax, unsigned long ecx) +static __always_inline void mwait_idle_with_hints(unsigned long eax, unsigned long ecx) { if (static_cpu_has_bug(X86_BUG_MONITOR) || !current_set_polling_and_test()) { if (static_cpu_has_bug(X86_BUG_CLFLUSH_MONITOR)) { --- a/arch/x86/kernel/vmlinux.lds.S +++ b/arch/x86/kernel/vmlinux.lds.S @@ -129,7 +129,6 @@ SECTIONS HEAD_TEXT TEXT_TEXT SCHED_TEXT - CPUIDLE_TEXT LOCK_TEXT KPROBES_TEXT SOFTIRQENTRY_TEXT --- a/arch/xtensa/kernel/vmlinux.lds.S +++ b/arch/xtensa/kernel/vmlinux.lds.S @@ -125,7 +125,6 @@ SECTIONS ENTRY_TEXT TEXT_TEXT SCHED_TEXT - CPUIDLE_TEXT LOCK_TEXT *(.fixup) } --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -580,6 +580,9 @@ ALIGN_FUNCTION(); \ __noinstr_text_start = .; \ *(.noinstr.text) \ + __cpuidle_text_start = .; \ + *(.cpuidle.text) \ + __cpuidle_text_end = .; \ __noinstr_text_end = .; /* @@ -620,12 +623,6 @@ *(.spinlock.text) \ __lock_text_end = .; -#define CPUIDLE_TEXT \ - ALIGN_FUNCTION(); \ - __cpuidle_text_start = .; \ - *(.cpuidle.text) \ - __cpuidle_text_end = .; - #define KPROBES_TEXT \ ALIGN_FUNCTION(); \ __kprobes_text_start = .; \ --- a/include/linux/compiler_types.h +++ b/include/linux/compiler_types.h @@ -232,11 +232,15 @@ struct ftrace_likely_data { #endif /* Section for code which can't be instrumented at all */ -#define noinstr \ - noinline notrace __attribute((__section__(".noinstr.text"))) \ +#define __noinstr_section(section) \ + noinline notrace __attribute((__section__(section))) \ __no_kcsan __no_sanitize_address __no_profile __no_sanitize_coverage \ __no_sanitize_memory +#define noinstr __noinstr_section(".noinstr.text") + +#define __cpuidle __noinstr_section(".cpuidle.text") + #endif /* __KERNEL__ */ #endif /* __ASSEMBLY__ */ --- a/include/linux/cpu.h +++ b/include/linux/cpu.h @@ -176,9 +176,6 @@ void __noreturn cpu_startup_entry(enum c void cpu_idle_poll_ctrl(bool enable); -/* Attach to any functions which should be considered cpuidle. */ -#define __cpuidle __section(".cpuidle.text") - bool cpu_in_idle(unsigned long pc); void arch_cpu_idle(void); --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -376,6 +376,7 @@ static int decode_instructions(struct ob if (!strcmp(sec->name, ".noinstr.text") || !strcmp(sec->name, ".entry.text") || + !strcmp(sec->name, ".cpuidle.text") || !strncmp(sec->name, ".text.__x86.", 12)) sec->noinstr = true; @@ -3361,6 +3362,12 @@ static inline bool noinstr_call_dest(str return true; /* + * If the symbol is a static_call trampoline, we can't tell. + */ + if (func->static_call_tramp) + return true; + + /* * The __ubsan_handle_*() calls are like WARN(), they only happen when * something 'BAD' happened. At the risk of taking the machine down, * let them proceed to get the message out. @@ -4155,6 +4162,12 @@ static int validate_noinstr_sections(str if (sec) { warnings += validate_section(file, sec); warnings += validate_unwind_hints(file, sec); + } + + sec = find_section_by_name(file->elf, ".cpuidle.text"); + if (sec) { + warnings += validate_section(file, sec); + warnings += validate_unwind_hints(file, sec); } return warnings; From patchwork Thu Jan 12 19:43:32 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 641858 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1587FC678DB for ; Thu, 12 Jan 2023 20:03:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241123AbjALUDL (ORCPT ); Thu, 12 Jan 2023 15:03:11 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44226 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233223AbjALT7Q (ORCPT ); Thu, 12 Jan 2023 14:59:16 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 94ABB2031; Thu, 12 Jan 2023 11:58:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=jJDEZOhAk9N+ZSaOA6QuB1P1t6S4a5Fqf3eoW7G5up4=; b=XRf8ma7wutsfHyKi1Hi+7cA2E+ ISzQ8igYvc962LFZPwr1xU5gtcPEyFKNa7hJA+KxC5XYQsvH3rZWOBWKUXYbDQ9bWkdzQ7R9MueJy Y09hIRzOfrTWr+PbbdBO+O+pTL3ssag303MZrAFSuk6pYPo4AKY8MFdhAn4zOXUIZKSkp8h/gpwEl 10HK45GmCZ5H2fOQVRJUoXUZAyby/MNlI+UHfVfbzb2L+6OHj+J51Q3gO67ND5o6v5qko/EvYLuAD +m7PUs3WeOOZ5RmRIxjaCKuS/CLHTwupWE8RYxRQfUMqsC07nwadxffrMTzEBUzUfxjbGDDH9bFmT jfFMvHtw==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1pG3ha-005Odo-Dd; Thu, 12 Jan 2023 19:57:30 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 568FF303420; Thu, 12 Jan 2023 20:57:13 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id E64E52CCF1F79; Thu, 12 Jan 2023 20:57:07 +0100 (CET) Message-ID: <20230112195540.434302128@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:32 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 18/51] cpuidle,intel_idle: Fix CPUIDLE_FLAG_IRQ_ENABLE *again* References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org vmlinux.o: warning: objtool: intel_idle_irq+0x10c: call to trace_hardirqs_off() leaves .noinstr.text section As per commit 32d4fd5751ea ("cpuidle,intel_idle: Fix CPUIDLE_FLAG_IRQ_ENABLE"): "must not have tracing in idle functions" Clearly people can't read and tinker along until splat dissapears. This straight up reverts commit d295ad34f236 ("intel_idle: Fix false positive RCU splats due to incorrect hardirqs state"). It doesn't re-introduce the problem because preceding patches fixed it properly. Fixes: d295ad34f236 ("intel_idle: Fix false positive RCU splats due to incorrect hardirqs state") Signed-off-by: Peter Zijlstra (Intel) Acked-by: Rafael J. Wysocki Acked-by: Frederic Weisbecker Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- drivers/idle/intel_idle.c | 8 +------- 1 file changed, 1 insertion(+), 7 deletions(-) --- a/drivers/idle/intel_idle.c +++ b/drivers/idle/intel_idle.c @@ -168,13 +168,7 @@ static __cpuidle int intel_idle_irq(stru raw_local_irq_enable(); ret = __intel_idle(dev, drv, index); - - /* - * The lockdep hardirqs state may be changed to 'on' with timer - * tick interrupt followed by __do_softirq(). Use local_irq_disable() - * to keep the hardirqs state correct. - */ - local_irq_disable(); + raw_local_irq_disable(); return ret; } From patchwork Thu Jan 12 19:43:33 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 642455 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 67375C678DC for ; Thu, 12 Jan 2023 20:04:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241519AbjALUEG (ORCPT ); Thu, 12 Jan 2023 15:04:06 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44138 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231814AbjALT6V (ORCPT ); Thu, 12 Jan 2023 14:58:21 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3EF02D8; Thu, 12 Jan 2023 11:57:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=Pd5LzlqFWhoOW/IghE5YxUytF5dcFo0PCwRqcxBfbik=; b=oqN2YQaXJbOZHz5FCUJfaFe6UX DXNinXDl0uUZ+yEueDZFs6SmCr4S9JdXvXG9J4ELcJZzGi9v1HWdQnaAo+VWBK6l0SX3JtEsnoAiQ pn/NXvV2G1H4wg5GSuqvDvUoC/h12Tu/6RMLpPm9FP50phUL2hnXdL3YTHV75lBymdb6+PqCR5Tjv 0TgKOHGWGmDEPHoGTZjFkf03lYW86OUQyUobAHxzDI6a2ofUgzuStjXiGF77FAzSsvdEXX5Mh6PUL wwPBiG17Uj3R07XMhFEG+7BQGShsAAXNWvH1OrvImxO55Rut0cWGQHvC4ddKzAlzrINdYDuEU43sU pEBrSNGg==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1pG3ha-005Odp-H9; Thu, 12 Jan 2023 19:57:30 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 5955F303422; Thu, 12 Jan 2023 20:57:13 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id EBA4A2CCF1F77; Thu, 12 Jan 2023 20:57:07 +0100 (CET) Message-ID: <20230112195540.494977795@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:33 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 19/51] cpuidle,intel_idle: Fix CPUIDLE_FLAG_INIT_XSTATE References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org vmlinux.o: warning: objtool: intel_idle_s2idle+0xd5: call to fpu_idle_fpregs() leaves .noinstr.text section vmlinux.o: warning: objtool: intel_idle_xstate+0x11: call to fpu_idle_fpregs() leaves .noinstr.text section vmlinux.o: warning: objtool: fpu_idle_fpregs+0x9: call to xfeatures_in_use() leaves .noinstr.text section Signed-off-by: Peter Zijlstra (Intel) Acked-by: Rafael J. Wysocki Acked-by: Frederic Weisbecker Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- arch/x86/include/asm/fpu/xcr.h | 4 ++-- arch/x86/include/asm/special_insns.h | 2 +- arch/x86/kernel/fpu/core.c | 4 ++-- 3 files changed, 5 insertions(+), 5 deletions(-) --- a/arch/x86/include/asm/fpu/xcr.h +++ b/arch/x86/include/asm/fpu/xcr.h @@ -5,7 +5,7 @@ #define XCR_XFEATURE_ENABLED_MASK 0x00000000 #define XCR_XFEATURE_IN_USE_MASK 0x00000001 -static inline u64 xgetbv(u32 index) +static __always_inline u64 xgetbv(u32 index) { u32 eax, edx; @@ -27,7 +27,7 @@ static inline void xsetbv(u32 index, u64 * * Callers should check X86_FEATURE_XGETBV1. */ -static inline u64 xfeatures_in_use(void) +static __always_inline u64 xfeatures_in_use(void) { return xgetbv(XCR_XFEATURE_IN_USE_MASK); } --- a/arch/x86/include/asm/special_insns.h +++ b/arch/x86/include/asm/special_insns.h @@ -295,7 +295,7 @@ static inline int enqcmds(void __iomem * return 0; } -static inline void tile_release(void) +static __always_inline void tile_release(void) { /* * Instruction opcode for TILERELEASE; supported in binutils --- a/arch/x86/kernel/fpu/core.c +++ b/arch/x86/kernel/fpu/core.c @@ -856,12 +856,12 @@ int fpu__exception_code(struct fpu *fpu, * Initialize register state that may prevent from entering low-power idle. * This function will be invoked from the cpuidle driver only when needed. */ -void fpu_idle_fpregs(void) +noinstr void fpu_idle_fpregs(void) { /* Note: AMX_TILE being enabled implies XGETBV1 support */ if (cpu_feature_enabled(X86_FEATURE_AMX_TILE) && (xfeatures_in_use() & XFEATURE_MASK_XTILE)) { tile_release(); - fpregs_deactivate(¤t->thread.fpu); + __this_cpu_write(fpu_fpregs_owner_ctx, NULL); } } From patchwork Thu Jan 12 19:43:34 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 641842 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9ABA3C77B7A for ; Thu, 12 Jan 2023 20:04:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241505AbjALUEE (ORCPT ); Thu, 12 Jan 2023 15:04:04 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44164 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232192AbjALT6b (ORCPT ); Thu, 12 Jan 2023 14:58:31 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E4A7F2E4; Thu, 12 Jan 2023 11:58:03 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=57ZArFmnIQzaVihzbRCoRwr2LaVbKaf8OfuJB2z1dTg=; b=MtUDAduugAyCbC0x+GybWDrpg6 nvFGvIRZYvWlQOex2R/1t/2v/rActZJrR7vwvuJlXKveemU/iz4++d4GotlAkvaPASxt/V69sv0IW ri/Ll4jnWKlySnMYN9/0CSP41DFCufPsa7lcX0Y1q6jOn11nHz/zwBf2W3f6x84qUVyueoCSvSKRR DDk6HyQ9GyyQiRgH8jh5MXflBjo3tYUtlSuDlBNuXxdzteU1sUfcP1XhD97BszaVYQzTxHQKcA/vV NNxIPT51Nkp1qj3KnJg7Rf8w5flxOjT2ZXNdvpP1EgMJE26QJPdlDIpe57D//TgbDdRbWno0lBcoI JmIhzKag==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1pG3ha-005Odr-Km; Thu, 12 Jan 2023 19:57:30 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 6226E303427; Thu, 12 Jan 2023 20:57:13 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id F0FCD2CCF1F7D; Thu, 12 Jan 2023 20:57:07 +0100 (CET) Message-ID: <20230112195540.556912863@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:34 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 20/51] cpuidle,intel_idle: Fix CPUIDLE_FLAG_IBRS References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org vmlinux.o: warning: objtool: intel_idle_ibrs+0x17: call to spec_ctrl_current() leaves .noinstr.text section vmlinux.o: warning: objtool: intel_idle_ibrs+0x27: call to wrmsrl.constprop.0() leaves .noinstr.text section Signed-off-by: Peter Zijlstra (Intel) Acked-by: Rafael J. Wysocki Acked-by: Frederic Weisbecker Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- arch/x86/kernel/cpu/bugs.c | 2 +- drivers/idle/intel_idle.c | 4 ++-- 2 files changed, 3 insertions(+), 3 deletions(-) --- a/arch/x86/kernel/cpu/bugs.c +++ b/arch/x86/kernel/cpu/bugs.c @@ -79,7 +79,7 @@ void write_spec_ctrl_current(u64 val, bo wrmsrl(MSR_IA32_SPEC_CTRL, val); } -u64 spec_ctrl_current(void) +noinstr u64 spec_ctrl_current(void) { return this_cpu_read(x86_spec_ctrl_current); } --- a/drivers/idle/intel_idle.c +++ b/drivers/idle/intel_idle.c @@ -181,12 +181,12 @@ static __cpuidle int intel_idle_ibrs(str int ret; if (smt_active) - wrmsrl(MSR_IA32_SPEC_CTRL, 0); + native_wrmsrl(MSR_IA32_SPEC_CTRL, 0); ret = __intel_idle(dev, drv, index); if (smt_active) - wrmsrl(MSR_IA32_SPEC_CTRL, spec_ctrl); + native_wrmsrl(MSR_IA32_SPEC_CTRL, spec_ctrl); return ret; } From patchwork Thu Jan 12 19:43:35 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 641851 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9D156C678DB for ; Thu, 12 Jan 2023 20:04:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241305AbjALUDd (ORCPT ); Thu, 12 Jan 2023 15:03:33 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44154 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233365AbjALT7Q (ORCPT ); Thu, 12 Jan 2023 14:59:16 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3E95C10BB; Thu, 12 Jan 2023 11:58:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=2eFs7p2/0chzp9jyFOBFOnUwzOwJX/uRLls14aFVgag=; b=Kp80SUD68uogQ7CF0VPz5WgdMT 0FS6rzZ+zEzxTiJoRY9jEMzKGVydp7aYWC3sRUUnILWIxAyd96CWyQ9T7UE6DShorpZaQ9mDk6KVK YpusfV5GbadFKS+Prc3I7me87VXj83zKX6LVewrKS1W6U1Y1Z1aNLoF8uW0CHwlh75MpxatpBfUgL QEy9WXc5DqqL3xIvlWnY+8NvGltRlD2i0A3ODa3Wy0R4rtWnWuaU1J2E2ZFUqVfxtvRA0m/3Gl5ri UpkOH+MJ9X8S5rPQvY9RK8BcUr7Tgb39GbSPZixfN6QDQ8AJi/5iNjoQt1kg6s3BOQoUGB+jZedZX ffni6LxA==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1pG3ha-005Ody-NI; Thu, 12 Jan 2023 19:57:30 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 6CF9730342A; Thu, 12 Jan 2023 20:57:13 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 020F62CCF1F7B; Thu, 12 Jan 2023 20:57:07 +0100 (CET) Message-ID: <20230112195540.618076436@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:35 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Gautham R. Shenoy" , "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 21/51] arch/idle: Change arch_cpu_idle() IRQ behaviour References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Current arch_cpu_idle() is called with IRQs disabled, but will return with IRQs enabled. However, the very first thing the generic code does after calling arch_cpu_idle() is raw_local_irq_disable(). This means that architectures that can idle with IRQs disabled end up doing a pointless 'enable-disable' dance. Therefore, push this IRQ disabling into the idle function, meaning that those architectures can avoid the pointless IRQ state flipping. Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Gautham R. Shenoy Acked-by: Mark Rutland [arm64] Acked-by: Rafael J. Wysocki Acked-by: Guo Ren Acked-by: Frederic Weisbecker Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- arch/alpha/kernel/process.c | 1 - arch/arc/kernel/process.c | 3 +++ arch/arm/kernel/process.c | 1 - arch/arm/mach-gemini/board-dt.c | 3 ++- arch/arm64/kernel/idle.c | 1 - arch/csky/kernel/process.c | 1 - arch/csky/kernel/smp.c | 2 +- arch/hexagon/kernel/process.c | 1 - arch/ia64/kernel/process.c | 1 + arch/loongarch/kernel/idle.c | 1 + arch/microblaze/kernel/process.c | 1 - arch/mips/kernel/idle.c | 8 +++----- arch/nios2/kernel/process.c | 1 - arch/openrisc/kernel/process.c | 1 + arch/parisc/kernel/process.c | 2 -- arch/powerpc/kernel/idle.c | 5 ++--- arch/riscv/kernel/process.c | 1 - arch/s390/kernel/idle.c | 1 - arch/sh/kernel/idle.c | 1 + arch/sparc/kernel/leon_pmc.c | 4 ++++ arch/sparc/kernel/process_32.c | 1 - arch/sparc/kernel/process_64.c | 3 ++- arch/um/kernel/process.c | 1 - arch/x86/coco/tdx/tdx.c | 3 +++ arch/x86/kernel/process.c | 15 ++++----------- arch/xtensa/kernel/process.c | 1 + kernel/sched/idle.c | 2 -- 27 files changed, 29 insertions(+), 37 deletions(-) --- a/arch/alpha/kernel/process.c +++ b/arch/alpha/kernel/process.c @@ -57,7 +57,6 @@ EXPORT_SYMBOL(pm_power_off); void arch_cpu_idle(void) { wtint(0); - raw_local_irq_enable(); } void arch_cpu_idle_dead(void) --- a/arch/arc/kernel/process.c +++ b/arch/arc/kernel/process.c @@ -114,6 +114,8 @@ void arch_cpu_idle(void) "sleep %0 \n" : :"I"(arg)); /* can't be "r" has to be embedded const */ + + raw_local_irq_disable(); } #else /* ARC700 */ @@ -122,6 +124,7 @@ void arch_cpu_idle(void) { /* sleep, but enable both set E1/E2 (levels of interrupts) before committing */ __asm__ __volatile__("sleep 0x3 \n"); + raw_local_irq_disable(); } #endif --- a/arch/arm/kernel/process.c +++ b/arch/arm/kernel/process.c @@ -78,7 +78,6 @@ void arch_cpu_idle(void) arm_pm_idle(); else cpu_do_idle(); - raw_local_irq_enable(); } void arch_cpu_idle_prepare(void) --- a/arch/arm/mach-gemini/board-dt.c +++ b/arch/arm/mach-gemini/board-dt.c @@ -42,8 +42,9 @@ static void gemini_idle(void) */ /* FIXME: Enabling interrupts here is racy! */ - local_irq_enable(); + raw_local_irq_enable(); cpu_do_idle(); + raw_local_irq_disable(); } static void __init gemini_init_machine(void) --- a/arch/arm64/kernel/idle.c +++ b/arch/arm64/kernel/idle.c @@ -42,5 +42,4 @@ void noinstr arch_cpu_idle(void) * tricks */ cpu_do_idle(); - raw_local_irq_enable(); } --- a/arch/csky/kernel/process.c +++ b/arch/csky/kernel/process.c @@ -100,6 +100,5 @@ void arch_cpu_idle(void) #ifdef CONFIG_CPU_PM_STOP asm volatile("stop\n"); #endif - raw_local_irq_enable(); } #endif --- a/arch/csky/kernel/smp.c +++ b/arch/csky/kernel/smp.c @@ -309,7 +309,7 @@ void arch_cpu_idle_dead(void) while (!secondary_stack) arch_cpu_idle(); - local_irq_disable(); + raw_local_irq_disable(); asm volatile( "mov sp, %0\n" --- a/arch/hexagon/kernel/process.c +++ b/arch/hexagon/kernel/process.c @@ -44,7 +44,6 @@ void arch_cpu_idle(void) { __vmwait(); /* interrupts wake us up, but irqs are still disabled */ - raw_local_irq_enable(); } /* --- a/arch/ia64/kernel/process.c +++ b/arch/ia64/kernel/process.c @@ -242,6 +242,7 @@ void arch_cpu_idle(void) (*mark_idle)(1); raw_safe_halt(); + raw_local_irq_disable(); if (mark_idle) (*mark_idle)(0); --- a/arch/loongarch/kernel/idle.c +++ b/arch/loongarch/kernel/idle.c @@ -13,4 +13,5 @@ void __cpuidle arch_cpu_idle(void) { raw_local_irq_enable(); __arch_cpu_idle(); /* idle instruction needs irq enabled */ + raw_local_irq_disable(); } --- a/arch/microblaze/kernel/process.c +++ b/arch/microblaze/kernel/process.c @@ -140,5 +140,4 @@ int dump_fpu(struct pt_regs *regs, elf_f void arch_cpu_idle(void) { - raw_local_irq_enable(); } --- a/arch/mips/kernel/idle.c +++ b/arch/mips/kernel/idle.c @@ -33,13 +33,13 @@ static void __cpuidle r3081_wait(void) { unsigned long cfg = read_c0_conf(); write_c0_conf(cfg | R30XX_CONF_HALT); - raw_local_irq_enable(); } void __cpuidle r4k_wait(void) { raw_local_irq_enable(); __r4k_wait(); + raw_local_irq_disable(); } /* @@ -57,7 +57,6 @@ void __cpuidle r4k_wait_irqoff(void) " .set arch=r4000 \n" " wait \n" " .set pop \n"); - raw_local_irq_enable(); } /* @@ -77,7 +76,6 @@ static void __cpuidle rm7k_wait_irqoff(v " wait \n" " mtc0 $1, $12 # stalls until W stage \n" " .set pop \n"); - raw_local_irq_enable(); } /* @@ -103,6 +101,8 @@ static void __cpuidle au1k_wait(void) " nop \n" " .set pop \n" : : "r" (au1k_wait), "r" (c0status)); + + raw_local_irq_disable(); } static int __initdata nowait; @@ -245,8 +245,6 @@ void arch_cpu_idle(void) { if (cpu_wait) cpu_wait(); - else - raw_local_irq_enable(); } #ifdef CONFIG_CPU_IDLE --- a/arch/nios2/kernel/process.c +++ b/arch/nios2/kernel/process.c @@ -33,7 +33,6 @@ EXPORT_SYMBOL(pm_power_off); void arch_cpu_idle(void) { - raw_local_irq_enable(); } /* --- a/arch/openrisc/kernel/process.c +++ b/arch/openrisc/kernel/process.c @@ -102,6 +102,7 @@ void arch_cpu_idle(void) raw_local_irq_enable(); if (mfspr(SPR_UPR) & SPR_UPR_PMP) mtspr(SPR_PMR, mfspr(SPR_PMR) | SPR_PMR_DME); + raw_local_irq_disable(); } void (*pm_power_off)(void) = NULL; --- a/arch/parisc/kernel/process.c +++ b/arch/parisc/kernel/process.c @@ -187,8 +187,6 @@ void arch_cpu_idle_dead(void) void __cpuidle arch_cpu_idle(void) { - raw_local_irq_enable(); - /* nop on real hardware, qemu will idle sleep. */ asm volatile("or %%r10,%%r10,%%r10\n":::); } --- a/arch/powerpc/kernel/idle.c +++ b/arch/powerpc/kernel/idle.c @@ -51,10 +51,9 @@ void arch_cpu_idle(void) * Some power_save functions return with * interrupts enabled, some don't. */ - if (irqs_disabled()) - raw_local_irq_enable(); + if (!irqs_disabled()) + raw_local_irq_disable(); } else { - raw_local_irq_enable(); /* * Go into low thread priority and possibly * low power mode. --- a/arch/riscv/kernel/process.c +++ b/arch/riscv/kernel/process.c @@ -39,7 +39,6 @@ extern asmlinkage void ret_from_kernel_t void arch_cpu_idle(void) { cpu_do_idle(); - raw_local_irq_enable(); } void __show_regs(struct pt_regs *regs) --- a/arch/s390/kernel/idle.c +++ b/arch/s390/kernel/idle.c @@ -66,7 +66,6 @@ void arch_cpu_idle(void) idle->idle_count++; account_idle_time(cputime_to_nsecs(idle_time)); raw_write_seqcount_end(&idle->seqcount); - raw_local_irq_enable(); } static ssize_t show_idle_count(struct device *dev, --- a/arch/sh/kernel/idle.c +++ b/arch/sh/kernel/idle.c @@ -25,6 +25,7 @@ void default_idle(void) raw_local_irq_enable(); /* Isn't this racy ? */ cpu_sleep(); + raw_local_irq_disable(); clear_bl_bit(); } --- a/arch/sparc/kernel/leon_pmc.c +++ b/arch/sparc/kernel/leon_pmc.c @@ -57,6 +57,8 @@ static void pmc_leon_idle_fixup(void) "lda [%0] %1, %%g0\n" : : "r"(address), "i"(ASI_LEON_BYPASS)); + + raw_local_irq_disable(); } /* @@ -70,6 +72,8 @@ static void pmc_leon_idle(void) /* For systems without power-down, this will be no-op */ __asm__ __volatile__ ("wr %g0, %asr19\n\t"); + + raw_local_irq_disable(); } /* Install LEON Power Down function */ --- a/arch/sparc/kernel/process_32.c +++ b/arch/sparc/kernel/process_32.c @@ -71,7 +71,6 @@ void arch_cpu_idle(void) { if (sparc_idle) (*sparc_idle)(); - raw_local_irq_enable(); } /* XXX cli/sti -> local_irq_xxx here, check this works once SMP is fixed. */ --- a/arch/sparc/kernel/process_64.c +++ b/arch/sparc/kernel/process_64.c @@ -59,7 +59,6 @@ void arch_cpu_idle(void) { if (tlb_type != hypervisor) { touch_nmi_watchdog(); - raw_local_irq_enable(); } else { unsigned long pstate; @@ -90,6 +89,8 @@ void arch_cpu_idle(void) "wrpr %0, %%g0, %%pstate" : "=&r" (pstate) : "i" (PSTATE_IE)); + + raw_local_irq_disable(); } } --- a/arch/um/kernel/process.c +++ b/arch/um/kernel/process.c @@ -217,7 +217,6 @@ void arch_cpu_idle(void) { cpu_tasks[current_thread_info()->cpu].pid = os_getpid(); um_idle_sleep(); - raw_local_irq_enable(); } int __cant_sleep(void) { --- a/arch/x86/coco/tdx/tdx.c +++ b/arch/x86/coco/tdx/tdx.c @@ -223,6 +223,9 @@ void __cpuidle tdx_safe_halt(void) */ if (__halt(irq_disabled, do_sti)) WARN_ONCE(1, "HLT instruction emulation failed\n"); + + /* XXX I can't make sense of what @do_sti actually does */ + raw_local_irq_disable(); } static int read_msr(struct pt_regs *regs, struct ve_info *ve) --- a/arch/x86/kernel/process.c +++ b/arch/x86/kernel/process.c @@ -701,6 +701,7 @@ EXPORT_SYMBOL(boot_option_idle_override) void __cpuidle default_idle(void) { raw_safe_halt(); + raw_local_irq_disable(); } #if defined(CONFIG_APM_MODULE) || defined(CONFIG_HALTPOLL_CPUIDLE_MODULE) EXPORT_SYMBOL(default_idle); @@ -806,13 +807,7 @@ static void amd_e400_idle(void) default_idle(); - /* - * The switch back from broadcast mode needs to be called with - * interrupts disabled. - */ - raw_local_irq_disable(); tick_broadcast_exit(); - raw_local_irq_enable(); } /* @@ -870,12 +865,10 @@ static __cpuidle void mwait_idle(void) } __monitor((void *)¤t_thread_info()->flags, 0, 0); - if (!need_resched()) + if (!need_resched()) { __sti_mwait(0, 0); - else - raw_local_irq_enable(); - } else { - raw_local_irq_enable(); + raw_local_irq_disable(); + } } __current_clr_polling(); } --- a/arch/xtensa/kernel/process.c +++ b/arch/xtensa/kernel/process.c @@ -183,6 +183,7 @@ void coprocessor_flush_release_all(struc void arch_cpu_idle(void) { platform_idle(); + raw_local_irq_disable(); } /* --- a/kernel/sched/idle.c +++ b/kernel/sched/idle.c @@ -79,7 +79,6 @@ void __weak arch_cpu_idle_dead(void) { } void __weak arch_cpu_idle(void) { cpu_idle_force_poll = 1; - raw_local_irq_enable(); } /** @@ -96,7 +95,6 @@ void __cpuidle default_idle_call(void) ct_cpuidle_enter(); arch_cpu_idle(); - raw_local_irq_disable(); ct_cpuidle_exit(); start_critical_timings(); From patchwork Thu Jan 12 19:43:36 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 642454 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 90659C7EE24 for ; Thu, 12 Jan 2023 20:04:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241528AbjALUEI (ORCPT ); Thu, 12 Jan 2023 15:04:08 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44252 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239063AbjALT7V (ORCPT ); Thu, 12 Jan 2023 14:59:21 -0500 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9501C389A; Thu, 12 Jan 2023 11:58:18 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=G2cvNgJ/FV6t8OtxjUTEWOoXfe4MyL5zef0iqwcucnw=; b=bXVWmsZjBd0A5Q1dRbnBvn7ToW 3j6eFTXMZeK1D2xNKaSBA5uYP5GPcQYNyXJPFyH83DSSp2MNSCsRoEQZP6MxewYz1wP7rgVNt/9It 2gRBrgOz8pdij4lPvYNsXhZafNcKFsYEgHj+n5CwG2HsWiNYOQSMKGbZog8b0utVeF16dtaoY6A5q V9oarqYXHJRh56KEBKm4N24tn9yAKxtrHFsxpcxWilSVN6H04Iq0zr2ANdWU40o1i9gecGsUeESZq fgxgFJmukOshxn//3WVgj5eg6awcLSHCIcGsAcbFMCnaNOKch5n6lO9ediMpnVQGteZqaYO/qlHWe o1amLvzw==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1pG3hF-0045oo-1p; Thu, 12 Jan 2023 19:57:35 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 74ABB30342D; Thu, 12 Jan 2023 20:57:13 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 062AF2CCF1F64; Thu, 12 Jan 2023 20:57:08 +0100 (CET) Message-ID: <20230112195540.682137572@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:36 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 22/51] x86/tdx: Remove TDX_HCALL_ISSUE_STI References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Now that arch_cpu_idle() is expected to return with IRQs disabled, avoid the useless STI/CLI dance. Per the specs this is supposed to work, but nobody has yet relied up this behaviour so broken implementations are possible. Signed-off-by: Peter Zijlstra (Intel) Acked-by: Rafael J. Wysocki Acked-by: Frederic Weisbecker Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- arch/x86/coco/tdx/tdcall.S | 13 ------------- arch/x86/coco/tdx/tdx.c | 23 ++++------------------- arch/x86/include/asm/shared/tdx.h | 1 - 3 files changed, 4 insertions(+), 33 deletions(-) --- a/arch/x86/coco/tdx/tdcall.S +++ b/arch/x86/coco/tdx/tdcall.S @@ -139,19 +139,6 @@ SYM_FUNC_START(__tdx_hypercall) movl $TDVMCALL_EXPOSE_REGS_MASK, %ecx - /* - * For the idle loop STI needs to be called directly before the TDCALL - * that enters idle (EXIT_REASON_HLT case). STI instruction enables - * interrupts only one instruction later. If there is a window between - * STI and the instruction that emulates the HALT state, there is a - * chance for interrupts to happen in this window, which can delay the - * HLT operation indefinitely. Since this is the not the desired - * result, conditionally call STI before TDCALL. - */ - testq $TDX_HCALL_ISSUE_STI, %rsi - jz .Lskip_sti - sti -.Lskip_sti: tdcall /* --- a/arch/x86/coco/tdx/tdx.c +++ b/arch/x86/coco/tdx/tdx.c @@ -169,7 +169,7 @@ static int ve_instr_len(struct ve_info * } } -static u64 __cpuidle __halt(const bool irq_disabled, const bool do_sti) +static u64 __cpuidle __halt(const bool irq_disabled) { struct tdx_hypercall_args args = { .r10 = TDX_HYPERCALL_STANDARD, @@ -189,20 +189,14 @@ static u64 __cpuidle __halt(const bool i * can keep the vCPU in virtual HLT, even if an IRQ is * pending, without hanging/breaking the guest. */ - return __tdx_hypercall(&args, do_sti ? TDX_HCALL_ISSUE_STI : 0); + return __tdx_hypercall(&args, 0); } static int handle_halt(struct ve_info *ve) { - /* - * Since non safe halt is mainly used in CPU offlining - * and the guest will always stay in the halt state, don't - * call the STI instruction (set do_sti as false). - */ const bool irq_disabled = irqs_disabled(); - const bool do_sti = false; - if (__halt(irq_disabled, do_sti)) + if (__halt(irq_disabled)) return -EIO; return ve_instr_len(ve); @@ -210,22 +204,13 @@ static int handle_halt(struct ve_info *v void __cpuidle tdx_safe_halt(void) { - /* - * For do_sti=true case, __tdx_hypercall() function enables - * interrupts using the STI instruction before the TDCALL. So - * set irq_disabled as false. - */ const bool irq_disabled = false; - const bool do_sti = true; /* * Use WARN_ONCE() to report the failure. */ - if (__halt(irq_disabled, do_sti)) + if (__halt(irq_disabled)) WARN_ONCE(1, "HLT instruction emulation failed\n"); - - /* XXX I can't make sense of what @do_sti actually does */ - raw_local_irq_disable(); } static int read_msr(struct pt_regs *regs, struct ve_info *ve) --- a/arch/x86/include/asm/shared/tdx.h +++ b/arch/x86/include/asm/shared/tdx.h @@ -8,7 +8,6 @@ #define TDX_HYPERCALL_STANDARD 0 #define TDX_HCALL_HAS_OUTPUT BIT(0) -#define TDX_HCALL_ISSUE_STI BIT(1) #define TDX_CPUID_LEAF_ID 0x21 #define TDX_IDENT "IntelTDX " From patchwork Thu Jan 12 19:43:37 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 642470 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6A690C678DF for ; Thu, 12 Jan 2023 20:03:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230230AbjALUDW (ORCPT ); Thu, 12 Jan 2023 15:03:22 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44138 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232835AbjALT7O (ORCPT ); Thu, 12 Jan 2023 14:59:14 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D11D61090; Thu, 12 Jan 2023 11:58:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=Hsr5V6aaf/kVSU2t73jNDRAWfLY8tgaZMY/8xmM8jWo=; b=gQ7Q9SfcfOCGLlvaFWMPSlQDV4 uKjocE/2Y34Nr3Jz761/H3K8ref7D/RHB23EoGkYYy1xOk3Feint61cmEzrTeJs9pKFsRiW2qqfOc a15g0aXUVDz0ZDo2MzRyxqBDaXdm6wfbxfKkhacFzf0dnqhRTBbnGYC0Ol79TQuuLMUcvUsmgrQsq Yw8OLwDnAiMOrgLy6Ivt5nddQwxIy8BHKaVFy+WqtLrCrntFsEUj0zjrnvFhZolV0YjTu4WNDYy9/ lDKMy9PbKPpnqJnECPubZ+WdVv92KEL7klGQq9pXFCJdS/Q4cXnTA6nMiHYLM5YqQGCUzlZ7euq5h XbhFNewA==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1pG3hb-005OeM-0G; Thu, 12 Jan 2023 19:57:31 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 7C84530342F; Thu, 12 Jan 2023 20:57:13 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 09BA02CCF1F7F; Thu, 12 Jan 2023 20:57:08 +0100 (CET) Message-ID: <20230112195540.743432118@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:37 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, Ulf Hansson , "Rafael J. Wysocki" Subject: [PATCH v3 23/51] arm,smp: Remove trace_.*_rcuidle() usage References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org None of these functions should ever be ran with RCU disabled anymore. Specifically, do_handle_IPI() is only called from handle_IPI() which explicitly does irq_enter()/irq_exit() which ensures RCU is watching. The problem with smp_cross_call() was, per commit 7c64cc0531fa ("arm: Use _rcuidle for smp_cross_call() tracepoints"), that cpuidle_enter_state_coupled() already had RCU disabled, but that's long been fixed by commit 1098582a0f6c ("sched,idle,rcu: Push rcu_idle deeper into the idle path"). Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Ulf Hansson Acked-by: Rafael J. Wysocki Acked-by: Frederic Weisbecker Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- arch/arm/kernel/smp.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) --- a/arch/arm/kernel/smp.c +++ b/arch/arm/kernel/smp.c @@ -639,7 +639,7 @@ static void do_handle_IPI(int ipinr) unsigned int cpu = smp_processor_id(); if ((unsigned)ipinr < NR_IPI) - trace_ipi_entry_rcuidle(ipi_types[ipinr]); + trace_ipi_entry(ipi_types[ipinr]); switch (ipinr) { case IPI_WAKEUP: @@ -686,7 +686,7 @@ static void do_handle_IPI(int ipinr) } if ((unsigned)ipinr < NR_IPI) - trace_ipi_exit_rcuidle(ipi_types[ipinr]); + trace_ipi_exit(ipi_types[ipinr]); } /* Legacy version, should go away once all irqchips have been converted */ @@ -709,7 +709,7 @@ static irqreturn_t ipi_handler(int irq, static void smp_cross_call(const struct cpumask *target, unsigned int ipinr) { - trace_ipi_raise_rcuidle(target, ipi_types[ipinr]); + trace_ipi_raise(target, ipi_types[ipinr]); __ipi_send_mask(ipi_desc[ipinr], target); } From patchwork Thu Jan 12 19:43:38 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 641835 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0C626C678DB for ; Thu, 12 Jan 2023 20:12:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241944AbjALUM0 (ORCPT ); Thu, 12 Jan 2023 15:12:26 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44140 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232708AbjALT7O (ORCPT ); Thu, 12 Jan 2023 14:59:14 -0500 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6EB86F5C; Thu, 12 Jan 2023 11:58:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=H++Izq9gHCigzm3jyfqVQx/OXXHHURXAPu4rHKpriQs=; b=Oi0kUglcFrS3jIOUrZoDJvcOVN KMsu46dZ6R4xAuLNdPZMHSde5BXLi7p5BoS3AvQIKTnK+Y7UxJNqVM2oTIBnlXrFTnLrdeXIfb+Qi 7AAikG9twh8Anr/sZFYaO7bb7qNnwpMCkz7DkMEjS9gx3+xe9hOodyU8GQp9X/lUnZ8sRJesyThHi RIfrPCVCdHkqJ74NP1GdEPmsGlsYXN+DPENhh6IP5huV+DA0rAhflvdEIcm2geli5CAbtis/SJcyh 5rHDUys63xFKGoXiApF9zgw4oIsvJ6+DyPsl9rZJITMkEb2o+HPd+tXle08OBDnF39ptfNNqdFe8b lJF6i9+g==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1pG3hG-0045ov-0L; Thu, 12 Jan 2023 19:57:10 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 824E6303432; Thu, 12 Jan 2023 20:57:13 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 0D9AD2CCF62A9; Thu, 12 Jan 2023 20:57:08 +0100 (CET) Message-ID: <20230112195540.804410487@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:38 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, Marc Zyngier , "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 24/51] arm64,smp: Remove trace_.*_rcuidle() usage References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Ever since commit d3afc7f12987 ("arm64: Allow IPIs to be handled as normal interrupts") this function is called in regular IRQ context. Signed-off-by: Peter Zijlstra (Intel) Acked-by: Mark Rutland Acked-by: Marc Zyngier Acked-by: Rafael J. Wysocki Acked-by: Frederic Weisbecker Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- arch/arm64/kernel/smp.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/arch/arm64/kernel/smp.c +++ b/arch/arm64/kernel/smp.c @@ -865,7 +865,7 @@ static void do_handle_IPI(int ipinr) unsigned int cpu = smp_processor_id(); if ((unsigned)ipinr < NR_IPI) - trace_ipi_entry_rcuidle(ipi_types[ipinr]); + trace_ipi_entry(ipi_types[ipinr]); switch (ipinr) { case IPI_RESCHEDULE: @@ -914,7 +914,7 @@ static void do_handle_IPI(int ipinr) } if ((unsigned)ipinr < NR_IPI) - trace_ipi_exit_rcuidle(ipi_types[ipinr]); + trace_ipi_exit(ipi_types[ipinr]); } static irqreturn_t ipi_handler(int irq, void *data) From patchwork Thu Jan 12 19:43:39 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 642464 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BFCE1C7113D for ; Thu, 12 Jan 2023 20:04:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241348AbjALUDp (ORCPT ); Thu, 12 Jan 2023 15:03:45 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44244 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232740AbjALT7O (ORCPT ); Thu, 12 Jan 2023 14:59:14 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C9BF71080; Thu, 12 Jan 2023 11:58:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=mHHfLn3ZXDs7+W84iYI4l64Hgzvzv2j66VWrzu7dGbw=; b=tDEYs9XtEVa5kDG9rCigwo5AS3 Gz/COrt0/F3lYrtSIri7b6KjIJmS99p9pvvpUsAydqHRFhYEDRBJzlr/eiNYGaYeLTRQ9poZgrWOv pmenc0oJ2ycWCTjXZ1CvyT7StGi+x04havRxsL9cHHhpQoYlwPKCAEvmFNpFqyM70J4m4X0XryfDi JnxYw4U/RQh/WHzqXFCvN2BED+581sgcXQcIWM0h+e82JbG0iLIn7+DPqqruTGc2nJF24caBV13O5 TV0LIyocKzR5phIlKMDEXQxtanjHETduuj9dYSbrun1OueVhu05M2tnW5LgroF5jmncSX8ZVy/9VE ADpe4RjA==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1pG3hb-005OeU-DV; Thu, 12 Jan 2023 19:57:31 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 8913F303435; Thu, 12 Jan 2023 20:57:13 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 11A262CCF62AB; Thu, 12 Jan 2023 20:57:08 +0100 (CET) Message-ID: <20230112195540.865735001@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:39 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 25/51] printk: Remove trace_.*_rcuidle() usage References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org The problem, per commit fc98c3c8c9dc ("printk: use rcuidle console tracepoint"), was printk usage from the cpuidle path where RCU was already disabled. Per the patches earlier in this series, this is no longer the case. Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Sergey Senozhatsky Acked-by: Petr Mladek Acked-by: Rafael J. Wysocki Acked-by: Frederic Weisbecker Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- kernel/printk/printk.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/kernel/printk/printk.c +++ b/kernel/printk/printk.c @@ -2238,7 +2238,7 @@ static u16 printk_sprint(char *text, u16 } } - trace_console_rcuidle(text, text_len); + trace_console(text, text_len); return text_len; } From patchwork Thu Jan 12 19:43:40 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 641841 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E6ADFC7112B for ; Thu, 12 Jan 2023 20:04:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241513AbjALUEF (ORCPT ); Thu, 12 Jan 2023 15:04:05 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44242 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232819AbjALT7O (ORCPT ); Thu, 12 Jan 2023 14:59:14 -0500 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9D478F71; Thu, 12 Jan 2023 11:58:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=nPi2VaSnukDemWiv4/ra3+urtWJi7QCVP16nY4QbOXo=; b=CDjE30SHxh/MHeshq7LcxCyRnB pAloIyE5xsjlMTbeKB6u/sxCgYnoL1p+OYgspBL5pFU5mK2BmQ486B/NcumbPG/RDRvRocqku+/+w 9uMl5zfVPVAo7sN1COzJFktYLeZ5aZ36fFLW3kVxdMQ9rGWvI/TrmA4iM2REwC6E89NJG4BtwXdYh Cf3lKWPZyztC126H0PkFylComcCFMahDJ0ywksznJkEyMohG+lfLKIpWv0CU/+S3YKvbiUVd/D8wg UbT7ahOD8OTpISXQDxoK1saIUM6+KxGwdAqH9AqOxzOt3IA8iSNroHtgP/sEIC13R1sHdOMtNIcT9 tVhxTauA==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1pG3hG-0045ow-0x; Thu, 12 Jan 2023 19:57:12 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 8DD6D303437; Thu, 12 Jan 2023 20:57:13 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 156E92CCF62AD; Thu, 12 Jan 2023 20:57:08 +0100 (CET) Message-ID: <20230112195540.927904612@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:40 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 26/51] time/tick-broadcast: Remove RCU_NONIDLE usage References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org No callers left that have already disabled RCU. Signed-off-by: Peter Zijlstra (Intel) Acked-by: Mark Rutland Acked-by: Rafael J. Wysocki Acked-by: Frederic Weisbecker Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- kernel/time/tick-broadcast-hrtimer.c | 29 ++++++++++++----------------- 1 file changed, 12 insertions(+), 17 deletions(-) --- a/kernel/time/tick-broadcast-hrtimer.c +++ b/kernel/time/tick-broadcast-hrtimer.c @@ -56,25 +56,20 @@ static int bc_set_next(ktime_t expires, * hrtimer callback function is currently running, then * hrtimer_start() cannot move it and the timer stays on the CPU on * which it is assigned at the moment. + */ + hrtimer_start(&bctimer, expires, HRTIMER_MODE_ABS_PINNED_HARD); + /* + * The core tick broadcast mode expects bc->bound_on to be set + * correctly to prevent a CPU which has the broadcast hrtimer + * armed from going deep idle. * - * As this can be called from idle code, the hrtimer_start() - * invocation has to be wrapped with RCU_NONIDLE() as - * hrtimer_start() can call into tracing. + * As tick_broadcast_lock is held, nothing can change the cpu + * base which was just established in hrtimer_start() above. So + * the below access is safe even without holding the hrtimer + * base lock. */ - RCU_NONIDLE( { - hrtimer_start(&bctimer, expires, HRTIMER_MODE_ABS_PINNED_HARD); - /* - * The core tick broadcast mode expects bc->bound_on to be set - * correctly to prevent a CPU which has the broadcast hrtimer - * armed from going deep idle. - * - * As tick_broadcast_lock is held, nothing can change the cpu - * base which was just established in hrtimer_start() above. So - * the below access is safe even without holding the hrtimer - * base lock. - */ - bc->bound_on = bctimer.base->cpu_base->cpu; - } ); + bc->bound_on = bctimer.base->cpu_base->cpu; + return 0; } From patchwork Thu Jan 12 19:43:41 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 641838 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5D3B9C71147 for ; Thu, 12 Jan 2023 20:04:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241194AbjALUDU (ORCPT ); Thu, 12 Jan 2023 15:03:20 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44252 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232890AbjALT7P (ORCPT ); Thu, 12 Jan 2023 14:59:15 -0500 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C9B531033; Thu, 12 Jan 2023 11:58:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=2yvU/+KlibzuaJax7jV4X0So1xAo1cwX7MytP6HDPxE=; b=RtS0+QiFQkSPrmnvBwD90sibId 2T1OpOZ1W0qyqszWHUUzMCV0mBkRIrI3Jx1Eo0JAoqNefsI6kGnm+W66mZiZGkMhdar4mvnfeJzqB Mdfa8IBKk0Y+xybhQD8fJur/5JucSWfzSMwk9qRjXUfdkXlYvkNZ2Y4RBOUyJnRaHSLDqYeZXBQNg WTA5OvPX8xQS3ggp1UIfW51Es4hw9CZpW5r1RKdyzzrm+0qD4/BaEyGXEwp+ZSdl9Cen7s28be7en nRD7AcYcqzyrGwCA1WGuyYGh+x0XE+JYrkUI5ly2/X9/5uXN0NripAXnpXwTz7toRAm7CDHBUibC0 PwPmNH+A==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1pG3hH-0045p4-0F; Thu, 12 Jan 2023 19:57:15 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 92E7230343A; Thu, 12 Jan 2023 20:57:13 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 194442CCF62AF; Thu, 12 Jan 2023 20:57:08 +0100 (CET) Message-ID: <20230112195540.988741683@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:41 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 27/51] cpuidle,sched: Remove annotations from TIF_{POLLING_NRFLAG,NEED_RESCHED} References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org vmlinux.o: warning: objtool: mwait_idle+0x5: call to current_set_polling_and_test() leaves .noinstr.text section vmlinux.o: warning: objtool: acpi_processor_ffh_cstate_enter+0xc5: call to current_set_polling_and_test() leaves .noinstr.text section vmlinux.o: warning: objtool: cpu_idle_poll.isra.0+0x73: call to test_ti_thread_flag() leaves .noinstr.text section vmlinux.o: warning: objtool: intel_idle+0xbc: call to current_set_polling_and_test() leaves .noinstr.text section vmlinux.o: warning: objtool: intel_idle_irq+0xea: call to current_set_polling_and_test() leaves .noinstr.text section vmlinux.o: warning: objtool: intel_idle_s2idle+0xb4: call to current_set_polling_and_test() leaves .noinstr.text section vmlinux.o: warning: objtool: intel_idle+0xa6: call to current_clr_polling() leaves .noinstr.text section vmlinux.o: warning: objtool: intel_idle_irq+0xbf: call to current_clr_polling() leaves .noinstr.text section vmlinux.o: warning: objtool: intel_idle_s2idle+0xa1: call to current_clr_polling() leaves .noinstr.text section vmlinux.o: warning: objtool: mwait_idle+0xe: call to __current_set_polling() leaves .noinstr.text section vmlinux.o: warning: objtool: acpi_processor_ffh_cstate_enter+0xc5: call to __current_set_polling() leaves .noinstr.text section vmlinux.o: warning: objtool: cpu_idle_poll.isra.0+0x73: call to test_ti_thread_flag() leaves .noinstr.text section vmlinux.o: warning: objtool: intel_idle+0xbc: call to __current_set_polling() leaves .noinstr.text section vmlinux.o: warning: objtool: intel_idle_irq+0xea: call to __current_set_polling() leaves .noinstr.text section vmlinux.o: warning: objtool: intel_idle_s2idle+0xb4: call to __current_set_polling() leaves .noinstr.text section vmlinux.o: warning: objtool: cpu_idle_poll.isra.0+0x73: call to test_ti_thread_flag() leaves .noinstr.text section vmlinux.o: warning: objtool: intel_idle_s2idle+0x73: call to test_ti_thread_flag.constprop.0() leaves .noinstr.text section vmlinux.o: warning: objtool: intel_idle_irq+0x91: call to test_ti_thread_flag.constprop.0() leaves .noinstr.text section vmlinux.o: warning: objtool: intel_idle+0x78: call to test_ti_thread_flag.constprop.0() leaves .noinstr.text section vmlinux.o: warning: objtool: acpi_safe_halt+0xf: call to test_ti_thread_flag.constprop.0() leaves .noinstr.text section Signed-off-by: Peter Zijlstra (Intel) Acked-by: Rafael J. Wysocki Acked-by: Frederic Weisbecker Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- include/linux/sched/idle.h | 40 ++++++++++++++++++++++++++++++---------- include/linux/thread_info.h | 18 +++++++++++++++++- 2 files changed, 47 insertions(+), 11 deletions(-) --- a/include/linux/sched/idle.h +++ b/include/linux/sched/idle.h @@ -23,12 +23,37 @@ static inline void wake_up_if_idle(int c */ #ifdef TIF_POLLING_NRFLAG -static inline void __current_set_polling(void) +#ifdef _ASM_GENERIC_BITOPS_INSTRUMENTED_ATOMIC_H + +static __always_inline void __current_set_polling(void) { - set_thread_flag(TIF_POLLING_NRFLAG); + arch_set_bit(TIF_POLLING_NRFLAG, + (unsigned long *)(¤t_thread_info()->flags)); } -static inline bool __must_check current_set_polling_and_test(void) +static __always_inline void __current_clr_polling(void) +{ + arch_clear_bit(TIF_POLLING_NRFLAG, + (unsigned long *)(¤t_thread_info()->flags)); +} + +#else + +static __always_inline void __current_set_polling(void) +{ + set_bit(TIF_POLLING_NRFLAG, + (unsigned long *)(¤t_thread_info()->flags)); +} + +static __always_inline void __current_clr_polling(void) +{ + clear_bit(TIF_POLLING_NRFLAG, + (unsigned long *)(¤t_thread_info()->flags)); +} + +#endif /* _ASM_GENERIC_BITOPS_INSTRUMENTED_ATOMIC_H */ + +static __always_inline bool __must_check current_set_polling_and_test(void) { __current_set_polling(); @@ -41,12 +66,7 @@ static inline bool __must_check current_ return unlikely(tif_need_resched()); } -static inline void __current_clr_polling(void) -{ - clear_thread_flag(TIF_POLLING_NRFLAG); -} - -static inline bool __must_check current_clr_polling_and_test(void) +static __always_inline bool __must_check current_clr_polling_and_test(void) { __current_clr_polling(); @@ -73,7 +93,7 @@ static inline bool __must_check current_ } #endif -static inline void current_clr_polling(void) +static __always_inline void current_clr_polling(void) { __current_clr_polling(); --- a/include/linux/thread_info.h +++ b/include/linux/thread_info.h @@ -177,7 +177,23 @@ static __always_inline unsigned long rea clear_ti_thread_flag(task_thread_info(t), TIF_##fl) #endif /* !CONFIG_GENERIC_ENTRY */ -#define tif_need_resched() test_thread_flag(TIF_NEED_RESCHED) +#ifdef _ASM_GENERIC_BITOPS_INSTRUMENTED_NON_ATOMIC_H + +static __always_inline bool tif_need_resched(void) +{ + return arch_test_bit(TIF_NEED_RESCHED, + (unsigned long *)(¤t_thread_info()->flags)); +} + +#else + +static __always_inline bool tif_need_resched(void) +{ + return test_bit(TIF_NEED_RESCHED, + (unsigned long *)(¤t_thread_info()->flags)); +} + +#endif /* _ASM_GENERIC_BITOPS_INSTRUMENTED_NON_ATOMIC_H */ #ifndef CONFIG_HAVE_ARCH_WITHIN_STACK_FRAMES static inline int arch_within_stack_frames(const void * const stack, From patchwork Thu Jan 12 19:43:42 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 641859 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3B34DC677F1 for ; Thu, 12 Jan 2023 20:03:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240329AbjALUDF (ORCPT ); Thu, 12 Jan 2023 15:03:05 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44250 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237409AbjALT7U (ORCPT ); Thu, 12 Jan 2023 14:59:20 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 06A3C2DD1; Thu, 12 Jan 2023 11:58:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=Y7pmXu6dfTZxDcbDXfqgJM0mS6VL3mXOpIjOPL8GveM=; b=qX6YjF7gO/MPwPtcPx0NhV1Ufk GyzKfoLIeIvjnz6bfozXzUoKsEK7V2vnIb67mqT6Dg07dD6w91/Q3MGHYIJzuj+4tzeyXzg8pRv4u G8kEMdIkxoEbfIr3MD19nyv9bg//wyY0H6+1G7ZI4FkOT+PhsWXDz9wI5QT+NsArvq+tJXaAEkhfy Yv3IUv0DQB87nGRwUvNNkcQTSs8WtB+6ASOtNGWFiIRpgcr4zBjlMxURErvmkpmDKjXUiZr8q8oo+ h+3ZbWqMHYHHCuauv0XHmOXQLZRHtrlpCFzHxEL7Pb1UBeBcLn+OxSKbAhCD9OnyRl2BKR2vES4dC JAZ8H1lQ==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1pG3hc-005Oeh-CC; Thu, 12 Jan 2023 19:57:32 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 99E9630343E; Thu, 12 Jan 2023 20:57:13 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 1D1292CCF62B1; Thu, 12 Jan 2023 20:57:08 +0100 (CET) Message-ID: <20230112195541.050542952@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:42 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 28/51] cpuidle,mwait: Make noinstr clean References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org vmlinux.o: warning: objtool: intel_idle_s2idle+0x6e: call to __monitor.constprop.0() leaves .noinstr.text section vmlinux.o: warning: objtool: intel_idle_irq+0x8c: call to __monitor.constprop.0() leaves .noinstr.text section vmlinux.o: warning: objtool: intel_idle+0x73: call to __monitor.constprop.0() leaves .noinstr.text section vmlinux.o: warning: objtool: mwait_idle+0x88: call to clflush() leaves .noinstr.text section Signed-off-by: Peter Zijlstra (Intel) Acked-by: Rafael J. Wysocki Acked-by: Frederic Weisbecker Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- arch/x86/include/asm/mwait.h | 12 ++++++------ arch/x86/include/asm/special_insns.h | 2 +- 2 files changed, 7 insertions(+), 7 deletions(-) --- a/arch/x86/include/asm/mwait.h +++ b/arch/x86/include/asm/mwait.h @@ -25,7 +25,7 @@ #define TPAUSE_C01_STATE 1 #define TPAUSE_C02_STATE 0 -static inline void __monitor(const void *eax, unsigned long ecx, +static __always_inline void __monitor(const void *eax, unsigned long ecx, unsigned long edx) { /* "monitor %eax, %ecx, %edx;" */ @@ -33,7 +33,7 @@ static inline void __monitor(const void :: "a" (eax), "c" (ecx), "d"(edx)); } -static inline void __monitorx(const void *eax, unsigned long ecx, +static __always_inline void __monitorx(const void *eax, unsigned long ecx, unsigned long edx) { /* "monitorx %eax, %ecx, %edx;" */ @@ -41,7 +41,7 @@ static inline void __monitorx(const void :: "a" (eax), "c" (ecx), "d"(edx)); } -static inline void __mwait(unsigned long eax, unsigned long ecx) +static __always_inline void __mwait(unsigned long eax, unsigned long ecx) { mds_idle_clear_cpu_buffers(); @@ -76,8 +76,8 @@ static inline void __mwait(unsigned long * EAX (logical) address to monitor * ECX #GP if not zero */ -static inline void __mwaitx(unsigned long eax, unsigned long ebx, - unsigned long ecx) +static __always_inline void __mwaitx(unsigned long eax, unsigned long ebx, + unsigned long ecx) { /* No MDS buffer clear as this is AMD/HYGON only */ @@ -86,7 +86,7 @@ static inline void __mwaitx(unsigned lon :: "a" (eax), "b" (ebx), "c" (ecx)); } -static inline void __sti_mwait(unsigned long eax, unsigned long ecx) +static __always_inline void __sti_mwait(unsigned long eax, unsigned long ecx) { mds_idle_clear_cpu_buffers(); /* "mwait %eax, %ecx;" */ --- a/arch/x86/include/asm/special_insns.h +++ b/arch/x86/include/asm/special_insns.h @@ -196,7 +196,7 @@ static inline void load_gs_index(unsigne #endif /* CONFIG_PARAVIRT_XXL */ -static inline void clflush(volatile void *__p) +static __always_inline void clflush(volatile void *__p) { asm volatile("clflush %0" : "+m" (*(volatile char __force *)__p)); } From patchwork Thu Jan 12 19:43:43 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 642459 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 976F7C678D7 for ; Thu, 12 Jan 2023 20:04:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241460AbjALUD6 (ORCPT ); Thu, 12 Jan 2023 15:03:58 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44230 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232528AbjALT7N (ORCPT ); Thu, 12 Jan 2023 14:59:13 -0500 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 515C7DFE; Thu, 12 Jan 2023 11:58:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=VEFTHHrPJN8MUcU5Q+nJT8cn7XDeQYtM8FLMMPm5jQc=; b=KkymT6fnEbdrqizXmWSH2cuOVn jQjLDtcvao8QQM1CDAK23eOtDc3kGN8afBk6jSjfUisCkP/gFLTRKyHuWxXNN647u5J77e9UXxs4t Nxxuk35lQLxa93CmttzHSiwgU7o+eq1l/NDUJPW0u/204PTmRFYkZtbGrRnibXXVYKxBvO5GiUx5C Ls/TdpMiBxMJCS6bvNyUYXqq4XdSVNVmiIEQu6E5gXUs4CphL1YhVZIEKwPAIa9s2+nPr/nrqytbH mC8VuqJNuDqfhjqJCiCzJnptubyVuLBm6bAA/aC0BGih+Kw2mq2OB93VPKPrJHR/xS9q1LgFbp1c/ ElutY9cQ==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1pG3hH-0045pD-1z; Thu, 12 Jan 2023 19:57:17 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id A48BF303441; Thu, 12 Jan 2023 20:57:13 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 20F0F2CCF62B3; Thu, 12 Jan 2023 20:57:08 +0100 (CET) Message-ID: <20230112195541.111485720@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:43 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 29/51] cpuidle,tdx: Make tdx noinstr clean References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org vmlinux.o: warning: objtool: __halt+0x2c: call to hcall_func.constprop.0() leaves .noinstr.text section vmlinux.o: warning: objtool: __halt+0x3f: call to __tdx_hypercall() leaves .noinstr.text section vmlinux.o: warning: objtool: __tdx_hypercall+0x66: call to __tdx_hypercall_failed() leaves .noinstr.text section Signed-off-by: Peter Zijlstra (Intel) Acked-by: Rafael J. Wysocki Acked-by: Frederic Weisbecker Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- arch/x86/boot/compressed/vmlinux.lds.S | 1 + arch/x86/coco/tdx/tdcall.S | 2 ++ arch/x86/coco/tdx/tdx.c | 5 +++-- 3 files changed, 6 insertions(+), 2 deletions(-) --- a/arch/x86/boot/compressed/vmlinux.lds.S +++ b/arch/x86/boot/compressed/vmlinux.lds.S @@ -34,6 +34,7 @@ SECTIONS _text = .; /* Text */ *(.text) *(.text.*) + *(.noinstr.text) _etext = . ; } .rodata : { --- a/arch/x86/coco/tdx/tdcall.S +++ b/arch/x86/coco/tdx/tdcall.S @@ -31,6 +31,8 @@ TDX_R12 | TDX_R13 | \ TDX_R14 | TDX_R15 ) +.section .noinstr.text, "ax" + /* * __tdx_module_call() - Used by TDX guests to request services from * the TDX module (does not include VMM services) using TDCALL instruction. --- a/arch/x86/coco/tdx/tdx.c +++ b/arch/x86/coco/tdx/tdx.c @@ -53,8 +53,9 @@ static inline u64 _tdx_hypercall(u64 fn, } /* Called from __tdx_hypercall() for unrecoverable failure */ -void __tdx_hypercall_failed(void) +noinstr void __tdx_hypercall_failed(void) { + instrumentation_begin(); panic("TDVMCALL failed. TDX module bug?"); } @@ -64,7 +65,7 @@ void __tdx_hypercall_failed(void) * Reusing the KVM EXIT_REASON macros makes it easier to connect the host and * guest sides of these calls. */ -static u64 hcall_func(u64 exit_reason) +static __always_inline u64 hcall_func(u64 exit_reason) { return exit_reason; } From patchwork Thu Jan 12 19:43:44 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 642456 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 70B9BC77B7B for ; Thu, 12 Jan 2023 20:04:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241498AbjALUED (ORCPT ); Thu, 12 Jan 2023 15:04:03 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44164 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232677AbjALT7O (ORCPT ); Thu, 12 Jan 2023 14:59:14 -0500 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4D777DD2; Thu, 12 Jan 2023 11:58:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=el0CIt1mM51BvZPcHKbhuF9lp1fNYUjgpLSAPy3Ccmg=; b=Ck0DUh4WceShPWHvX/Kf9wzAc5 LW9/MseIhf8iNkhstTboyysQs7afqdDp+zmGYRCPRwvD+gG345BUPSd6UNpuPS8eooYOKXSsg/7T5 655KxAhdvcqgu5hho7Ry3Ke8cJH9zIebv0Gw8uHQiNcWL0+kNoxR8bdOJ3xmnFKJAx1cActiBJz/G Kk2Y8XMVyztOHl61TZpp9DazG9y4yZ1xVyIVapneoF0GfOKWb5PrzH6xdHM8VBVDHE7BLO+GiL8S7 fbG5C+jy2Z6VutW16cWLguxfAr043p8b7Foe7myn2d/vemXss0AmFuYGKohrfZ0znOdM8BpBKuAeD 521bcW5w==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1pG3hH-0045pJ-2Y; Thu, 12 Jan 2023 19:57:15 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id B23F0303444; Thu, 12 Jan 2023 20:57:13 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 24C2C2CCF62B5; Thu, 12 Jan 2023 20:57:08 +0100 (CET) Message-ID: <20230112195541.171918174@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:44 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 30/51] cpuidle,xenpv: Make more PARAVIRT_XXL noinstr clean References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org vmlinux.o: warning: objtool: acpi_idle_enter_s2idle+0xde: call to wbinvd() leaves .noinstr.text section vmlinux.o: warning: objtool: default_idle+0x4: call to arch_safe_halt() leaves .noinstr.text section vmlinux.o: warning: objtool: xen_safe_halt+0xa: call to HYPERVISOR_sched_op.constprop.0() leaves .noinstr.text section Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Srivatsa S. Bhat (VMware) Reviewed-by: Juergen Gross Acked-by: Rafael J. Wysocki Acked-by: Frederic Weisbecker Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- arch/x86/include/asm/paravirt.h | 6 ++++-- arch/x86/include/asm/special_insns.h | 4 ++-- arch/x86/include/asm/xen/hypercall.h | 2 +- arch/x86/kernel/paravirt.c | 14 ++++++++++++-- arch/x86/xen/enlighten_pv.c | 2 +- arch/x86/xen/irq.c | 2 +- 6 files changed, 21 insertions(+), 9 deletions(-) --- a/arch/x86/include/asm/paravirt.h +++ b/arch/x86/include/asm/paravirt.h @@ -168,7 +168,7 @@ static inline void __write_cr4(unsigned PVOP_VCALL1(cpu.write_cr4, x); } -static inline void arch_safe_halt(void) +static __always_inline void arch_safe_halt(void) { PVOP_VCALL0(irq.safe_halt); } @@ -178,7 +178,9 @@ static inline void halt(void) PVOP_VCALL0(irq.halt); } -static inline void wbinvd(void) +extern noinstr void pv_native_wbinvd(void); + +static __always_inline void wbinvd(void) { PVOP_ALT_VCALL0(cpu.wbinvd, "wbinvd", ALT_NOT(X86_FEATURE_XENPV)); } --- a/arch/x86/include/asm/special_insns.h +++ b/arch/x86/include/asm/special_insns.h @@ -115,7 +115,7 @@ static inline void wrpkru(u32 pkru) } #endif -static inline void native_wbinvd(void) +static __always_inline void native_wbinvd(void) { asm volatile("wbinvd": : :"memory"); } @@ -179,7 +179,7 @@ static inline void __write_cr4(unsigned native_write_cr4(x); } -static inline void wbinvd(void) +static __always_inline void wbinvd(void) { native_wbinvd(); } --- a/arch/x86/include/asm/xen/hypercall.h +++ b/arch/x86/include/asm/xen/hypercall.h @@ -382,7 +382,7 @@ MULTI_stack_switch(struct multicall_entr } #endif -static inline int +static __always_inline int HYPERVISOR_sched_op(int cmd, void *arg) { return _hypercall2(int, sched_op, cmd, arg); --- a/arch/x86/kernel/paravirt.c +++ b/arch/x86/kernel/paravirt.c @@ -233,6 +233,11 @@ static noinstr void pv_native_set_debugr native_set_debugreg(regno, val); } +noinstr void pv_native_wbinvd(void) +{ + native_wbinvd(); +} + static noinstr void pv_native_irq_enable(void) { native_irq_enable(); @@ -242,6 +247,11 @@ static noinstr void pv_native_irq_disabl { native_irq_disable(); } + +static noinstr void pv_native_safe_halt(void) +{ + native_safe_halt(); +} #endif enum paravirt_lazy_mode paravirt_get_lazy_mode(void) @@ -273,7 +283,7 @@ struct paravirt_patch_template pv_ops = .cpu.read_cr0 = native_read_cr0, .cpu.write_cr0 = native_write_cr0, .cpu.write_cr4 = native_write_cr4, - .cpu.wbinvd = native_wbinvd, + .cpu.wbinvd = pv_native_wbinvd, .cpu.read_msr = native_read_msr, .cpu.write_msr = native_write_msr, .cpu.read_msr_safe = native_read_msr_safe, @@ -307,7 +317,7 @@ struct paravirt_patch_template pv_ops = .irq.save_fl = __PV_IS_CALLEE_SAVE(native_save_fl), .irq.irq_disable = __PV_IS_CALLEE_SAVE(pv_native_irq_disable), .irq.irq_enable = __PV_IS_CALLEE_SAVE(pv_native_irq_enable), - .irq.safe_halt = native_safe_halt, + .irq.safe_halt = pv_native_safe_halt, .irq.halt = native_halt, #endif /* CONFIG_PARAVIRT_XXL */ --- a/arch/x86/xen/enlighten_pv.c +++ b/arch/x86/xen/enlighten_pv.c @@ -1019,7 +1019,7 @@ static const typeof(pv_ops) xen_cpu_ops .write_cr4 = xen_write_cr4, - .wbinvd = native_wbinvd, + .wbinvd = pv_native_wbinvd, .read_msr = xen_read_msr, .write_msr = xen_write_msr, --- a/arch/x86/xen/irq.c +++ b/arch/x86/xen/irq.c @@ -24,7 +24,7 @@ noinstr void xen_force_evtchn_callback(v (void)HYPERVISOR_xen_version(0, NULL); } -static void xen_safe_halt(void) +static noinstr void xen_safe_halt(void) { /* Blocking includes an implicit local_irq_enable(). */ if (HYPERVISOR_sched_op(SCHEDOP_block, NULL) != 0) From patchwork Thu Jan 12 19:43:45 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 641855 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F2231C7112F for ; Thu, 12 Jan 2023 20:03:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241227AbjALUDX (ORCPT ); Thu, 12 Jan 2023 15:03:23 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44278 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233217AbjALT7Q (ORCPT ); Thu, 12 Jan 2023 14:59:16 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 92067200A; Thu, 12 Jan 2023 11:58:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=US/ew+5Vik6jGnrGGiz1QKoghqD4+Lgz+zGR8hxwH/s=; b=ZwVDualzbLr5+I0VR3VEFN6BlQ JWHjOCtseUyxyQAFt/9LLnnJ6zp6zBPGTqTQ0B7GtkagaCfBJfuDXw3pb5HsKg33Vx7aegR/JPIh1 hcaMhK1rZ7/PvHReyW6POgnu+xwXEaEiNL0+lQeXuU8En2JSD4XmM5FjNc0j458FU0kWm/9eOPP4R 0jFSo+Q3sj7J8Mac2EO4dXrh746nZXcQVBmldBSFp++X+oYOwpLn3d+AOUeIT/mE7eE/LFkbkgOSR OPeKiSwiBCC7zwkE2kyJn2EUo7uHFpzRtd2bQbPK/nO+9Z+wXSZ+69iD4bNXHIOgQVqP/6mkCHtNV 58CyFQuw==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1pG3hc-005Oev-W1; Thu, 12 Jan 2023 19:57:33 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id B61AD303447; Thu, 12 Jan 2023 20:57:13 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 2953C2CCF62B7; Thu, 12 Jan 2023 20:57:08 +0100 (CET) Message-ID: <20230112195541.233779815@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:45 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 31/51] cpuidle,nospec: Make noinstr clean References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org vmlinux.o: warning: objtool: mwait_idle+0x47: call to mds_idle_clear_cpu_buffers() leaves .noinstr.text section vmlinux.o: warning: objtool: acpi_processor_ffh_cstate_enter+0xa2: call to mds_idle_clear_cpu_buffers() leaves .noinstr.text section vmlinux.o: warning: objtool: intel_idle+0x91: call to mds_idle_clear_cpu_buffers() leaves .noinstr.text section vmlinux.o: warning: objtool: intel_idle_s2idle+0x8c: call to mds_idle_clear_cpu_buffers() leaves .noinstr.text section vmlinux.o: warning: objtool: intel_idle_irq+0xaa: call to mds_idle_clear_cpu_buffers() leaves .noinstr.text section Signed-off-by: Peter Zijlstra (Intel) Acked-by: Rafael J. Wysocki Acked-by: Frederic Weisbecker Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- arch/x86/include/asm/nospec-branch.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/x86/include/asm/nospec-branch.h +++ b/arch/x86/include/asm/nospec-branch.h @@ -310,7 +310,7 @@ static __always_inline void mds_user_cle * * Clear CPU buffers if the corresponding static key is enabled */ -static inline void mds_idle_clear_cpu_buffers(void) +static __always_inline void mds_idle_clear_cpu_buffers(void) { if (static_branch_likely(&mds_idle_clear)) mds_clear_cpu_buffers(); From patchwork Thu Jan 12 19:43:46 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 642453 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8B384C71153 for ; Thu, 12 Jan 2023 20:04:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241171AbjALUDS (ORCPT ); Thu, 12 Jan 2023 15:03:18 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44158 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232118AbjALT6b (ORCPT ); Thu, 12 Jan 2023 14:58:31 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C5C6B225; Thu, 12 Jan 2023 11:58:02 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=DVmthOBTi8Yd+1hoz4bpY0hqbVL72Y+E2XHDdN1zqxc=; b=lU+pE8XRxUW4+CC8OuM7xeVx/M 53AZChJydAaQiNNNgWeQoTlIIugCKq8amTsHlJecasU3dF9bLGhfr0XD7p0zfc1xhqPVI6iQEDfqX qXF+EpD9Bp4SVnDyAwq5dbL9yLZztXpLXKAoIh2CWTXdxqClmYRsHpA8pyl5FRdBgommZULZLIE56 PjEu9hkifrrqxkSQ/X13tLWCHGM51XCgnnXTbVlw1+fjNdVPnZOIYRsxn6+jcprBZ1YbkjynCuAGB phuV4qtrZKPyDS35nlAPD+Rz3SJqOYDompFJbF1wWA90cXW8tptoQc6+aDjXQIUUftFrnUPYliwFp nHblH0EQ==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1pG3hd-005Ofb-8A; Thu, 12 Jan 2023 19:57:33 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id B8EF830344E; Thu, 12 Jan 2023 20:57:13 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 2D82F2CCF62B9; Thu, 12 Jan 2023 20:57:08 +0100 (CET) Message-ID: <20230112195541.294846301@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:46 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 32/51] cpuidle,acpi: Make noinstr clean References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org vmlinux.o: warning: objtool: io_idle+0xc: call to __inb.isra.0() leaves .noinstr.text section vmlinux.o: warning: objtool: acpi_idle_enter+0xfe: call to num_online_cpus() leaves .noinstr.text section vmlinux.o: warning: objtool: acpi_idle_enter+0x115: call to acpi_idle_fallback_to_c1.isra.0() leaves .noinstr.text section Signed-off-by: Peter Zijlstra (Intel) Acked-by: Rafael J. Wysocki Acked-by: Frederic Weisbecker Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- arch/x86/include/asm/shared/io.h | 4 ++-- drivers/acpi/processor_idle.c | 2 +- include/linux/cpumask.h | 4 ++-- 3 files changed, 5 insertions(+), 5 deletions(-) --- a/arch/x86/include/asm/shared/io.h +++ b/arch/x86/include/asm/shared/io.h @@ -5,13 +5,13 @@ #include #define BUILDIO(bwl, bw, type) \ -static inline void __out##bwl(type value, u16 port) \ +static __always_inline void __out##bwl(type value, u16 port) \ { \ asm volatile("out" #bwl " %" #bw "0, %w1" \ : : "a"(value), "Nd"(port)); \ } \ \ -static inline type __in##bwl(u16 port) \ +static __always_inline type __in##bwl(u16 port) \ { \ type value; \ asm volatile("in" #bwl " %w1, %" #bw "0" \ --- a/drivers/acpi/processor_idle.c +++ b/drivers/acpi/processor_idle.c @@ -593,7 +593,7 @@ static int acpi_idle_play_dead(struct cp return 0; } -static bool acpi_idle_fallback_to_c1(struct acpi_processor *pr) +static __always_inline bool acpi_idle_fallback_to_c1(struct acpi_processor *pr) { return IS_ENABLED(CONFIG_HOTPLUG_CPU) && !pr->flags.has_cst && !(acpi_gbl_FADT.flags & ACPI_FADT_C2_MP_SUPPORTED); --- a/include/linux/cpumask.h +++ b/include/linux/cpumask.h @@ -908,9 +908,9 @@ static inline const struct cpumask *get_ * concurrent CPU hotplug operations unless invoked from a cpuhp_lock held * region. */ -static inline unsigned int num_online_cpus(void) +static __always_inline unsigned int num_online_cpus(void) { - return atomic_read(&__num_online_cpus); + return arch_atomic_read(&__num_online_cpus); } #define num_possible_cpus() cpumask_weight(cpu_possible_mask) #define num_present_cpus() cpumask_weight(cpu_present_mask) From patchwork Thu Jan 12 19:43:47 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 642452 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 53EA5C678DD for ; Thu, 12 Jan 2023 20:12:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241922AbjALUMY (ORCPT ); Thu, 12 Jan 2023 15:12:24 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44240 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232685AbjALT7O (ORCPT ); Thu, 12 Jan 2023 14:59:14 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5A72CEB0; Thu, 12 Jan 2023 11:58:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=cMg3ptdf90ideilc5ESAExVXsDzvqUAUHPnoGLTznE4=; b=AQVbLNGLAYLI5glCIBdfN2BTr/ Gz/Reu1wlylo5D1rPRX3tYfuclMb30JqVrgGLY+i8h5Xf4OY4kfQXs65r/W3Q+cYwmERZwJKdYyGu dOIJbUu55LP0s2WpAnsehl0pUa57AJ3Lq0DpQp5D7jIwVSFDXKmJmnOiTcPJuwyIZF8b0FkqntpIC b8LadvLyxjnkWpOvABXtsz53rhvZOuGgIQLV6FRFQ1goVxCxypfG444hWrorgBNhddOaBK6ge/aAD GocMGlGGl5ycw4gr25/L6Jb+p3aQyhRh2wg9Sdn3uYmPp24GCT0nLRuVL3vNNcZ0HKYejgio/4ncJ cUAaLzFw==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1pG3hd-005Ofs-RT; Thu, 12 Jan 2023 19:57:33 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id C0E86303451; Thu, 12 Jan 2023 20:57:13 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 31AC02CCF62BB; Thu, 12 Jan 2023 20:57:08 +0100 (CET) Message-ID: <20230112195541.355283994@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:47 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com Subject: [PATCH v3 33/51] trace: Remove trace_hardirqs_{on,off}_caller() References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Per commit 56e62a737028 ("s390: convert to generic entry") the last and only callers of trace_hardirqs_{on,off}_caller() went away, clean up. Cc: Sven Schnelle Signed-off-by: Peter Zijlstra (Intel) --- kernel/trace/trace_preemptirq.c | 29 ----------------------------- 1 file changed, 29 deletions(-) --- a/kernel/trace/trace_preemptirq.c +++ b/kernel/trace/trace_preemptirq.c @@ -84,35 +84,6 @@ void trace_hardirqs_off(void) } EXPORT_SYMBOL(trace_hardirqs_off); NOKPROBE_SYMBOL(trace_hardirqs_off); - -__visible void trace_hardirqs_on_caller(unsigned long caller_addr) -{ - if (this_cpu_read(tracing_irq_cpu)) { - if (!in_nmi()) - trace_irq_enable_rcuidle(CALLER_ADDR0, caller_addr); - tracer_hardirqs_on(CALLER_ADDR0, caller_addr); - this_cpu_write(tracing_irq_cpu, 0); - } - - lockdep_hardirqs_on_prepare(); - lockdep_hardirqs_on(caller_addr); -} -EXPORT_SYMBOL(trace_hardirqs_on_caller); -NOKPROBE_SYMBOL(trace_hardirqs_on_caller); - -__visible void trace_hardirqs_off_caller(unsigned long caller_addr) -{ - lockdep_hardirqs_off(caller_addr); - - if (!this_cpu_read(tracing_irq_cpu)) { - this_cpu_write(tracing_irq_cpu, 1); - tracer_hardirqs_off(CALLER_ADDR0, caller_addr); - if (!in_nmi()) - trace_irq_disable_rcuidle(CALLER_ADDR0, caller_addr); - } -} -EXPORT_SYMBOL(trace_hardirqs_off_caller); -NOKPROBE_SYMBOL(trace_hardirqs_off_caller); #endif /* CONFIG_TRACE_IRQFLAGS */ #ifdef CONFIG_TRACE_PREEMPT_TOGGLE From patchwork Thu Jan 12 19:43:48 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 642463 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B8FD2C71149 for ; Thu, 12 Jan 2023 20:04:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241378AbjALUDv (ORCPT ); Thu, 12 Jan 2023 15:03:51 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44304 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235088AbjALT7T (ORCPT ); Thu, 12 Jan 2023 14:59:19 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BC7B32734; Thu, 12 Jan 2023 11:58:08 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=BAfnvD9cLrzo61xSnZTsQNCRnrvqWps/XpXHA7FoM0k=; b=h9pA92J6I0Ai4tfamqsDsGaoNX 8FiSc+znckjvix+OnnY/QPlNv98oDcDymsSz48ev28CjwPJ3vGHzam4vZ15NDpv0uenxblhcshipZ cDJ5dY9PuAWS5WjZmmVdgeAe/742HYNajQa3p8cXLYPc0ACiy6YXDAy3JenmXArPaGnrI2XNtAmJn vjPkZLOhVLyLHmzxpX1UWcQ1/KnH4xfYvV2d4mLXnXO9ngPQkdwl6sm46WlKPWlfH1Y+ViwSBkgZj 4lqcNuRgO7NnElNQ9hKg9IznScF/Kg863lMBqr329R02nU8LplcHz7BXM4OcQZSXS4JeQ/Ci7T628 YriehVbg==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1pG3hd-005Ofu-VU; Thu, 12 Jan 2023 19:57:34 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id C8D50303454; Thu, 12 Jan 2023 20:57:13 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 364D42CCF62BD; Thu, 12 Jan 2023 20:57:08 +0100 (CET) Message-ID: <20230112195541.416110581@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:48 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 34/51] trace: WARN on rcuidle References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org ARCH_WANTS_NO_INSTR (a superset of CONFIG_GENERIC_ENTRY) disallows any and all tracing when RCU isn't enabled. Signed-off-by: Peter Zijlstra (Intel) Acked-by: Rafael J. Wysocki Acked-by: Frederic Weisbecker Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- include/linux/tracepoint.h | 15 +++++++++++++-- kernel/trace/trace.c | 3 +++ 2 files changed, 16 insertions(+), 2 deletions(-) --- a/include/linux/tracepoint.h +++ b/include/linux/tracepoint.h @@ -178,6 +178,17 @@ static inline struct tracepoint *tracepo #endif /* CONFIG_HAVE_STATIC_CALL */ /* + * ARCH_WANTS_NO_INSTR archs are expected to have sanitized entry and idle + * code that disallow any/all tracing/instrumentation when RCU isn't watching. + */ +#ifdef CONFIG_ARCH_WANTS_NO_INSTR +#define RCUIDLE_COND(rcuidle) (rcuidle) +#else +/* srcu can't be used from NMI */ +#define RCUIDLE_COND(rcuidle) (rcuidle && in_nmi()) +#endif + +/* * it_func[0] is never NULL because there is at least one element in the array * when the array itself is non NULL. */ @@ -188,8 +199,8 @@ static inline struct tracepoint *tracepo if (!(cond)) \ return; \ \ - /* srcu can't be used from NMI */ \ - WARN_ON_ONCE(rcuidle && in_nmi()); \ + if (WARN_ON_ONCE(RCUIDLE_COND(rcuidle))) \ + return; \ \ /* keep srcu and sched-rcu usage consistent */ \ preempt_disable_notrace(); \ --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -3119,6 +3119,9 @@ void __trace_stack(struct trace_array *t return; } + if (WARN_ON_ONCE(IS_ENABLED(CONFIG_GENERIC_ENTRY))) + return; + /* * When an NMI triggers, RCU is enabled via ct_nmi_enter(), * but if the above rcu_is_watching() failed, then the NMI From patchwork Thu Jan 12 19:43:49 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 642466 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E0F07C678D7 for ; Thu, 12 Jan 2023 20:04:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241299AbjALUDb (ORCPT ); Thu, 12 Jan 2023 15:03:31 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44160 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232103AbjALT6b (ORCPT ); Thu, 12 Jan 2023 14:58:31 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E0F3D24E; Thu, 12 Jan 2023 11:58:02 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=dY+sZF8zXVTImEusizdFam+mvD2uBaZ1sCttd0zpvx8=; b=j8TQ8t09IgELQKWksGBtI2ytKh pl1eHvaCJsnvxEv3UZnAHZzXY8/DatsPW/DvWOzGfrp159hq9PkH1R2mk80AkUwNnV23MbM3VXk9S aHTCDYPoAWwhIXCDoOhwZadFG8TpQgXTBYmBr06QAE/dQt/rsGspfhVNq70IDTtZ4SyL9C86jhQ8O iPmiqmKtWMiye8NF1XSccdlAXxBY2ADAcQ88Cq6GtXfD8ft+VpJQpX97vOLZQ2G+cqUvN1wEE5T0R eGidhLHEBJsPp8wG+NJ5bnTlafvqHcjiTkEwNapZjYTA4Pu5AO87/liDLgzA9SW6Le+OtcYoOojwJ RdV1d5uw==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1pG3he-005OgC-FK; Thu, 12 Jan 2023 19:57:34 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id D0FBA303457; Thu, 12 Jan 2023 20:57:13 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 3A2002CCF62BF; Thu, 12 Jan 2023 20:57:08 +0100 (CET) Message-ID: <20230112195541.477416709@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:49 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com Subject: [PATCH v3 35/51] trace,hardirq: No moar _rcuidle() tracing References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Robot reported that trace_hardirqs_{on,off}() tickle the forbidden _rcuidle() tracepoint through local_irq_{en,dis}able(). For 'sane' configs, these calls will only happen with RCU enabled and as such can use the regular tracepoint. This also means it's possible to trace them from NMI context again. Signed-off-by: Peter Zijlstra (Intel) --- kernel/trace/trace_preemptirq.c | 21 +++++++++++++-------- 1 file changed, 13 insertions(+), 8 deletions(-) --- a/kernel/trace/trace_preemptirq.c +++ b/kernel/trace/trace_preemptirq.c @@ -20,6 +20,15 @@ static DEFINE_PER_CPU(int, tracing_irq_cpu); /* + * ... + */ +#ifdef CONFIG_ARCH_WANTS_NO_INSTR +#define trace(point) trace_##point +#else +#define trace(point) if (!in_nmi()) trace_##point##_rcuidle +#endif + +/* * Like trace_hardirqs_on() but without the lockdep invocation. This is * used in the low level entry code where the ordering vs. RCU is important * and lockdep uses a staged approach which splits the lockdep hardirq @@ -28,8 +37,7 @@ static DEFINE_PER_CPU(int, tracing_irq_c void trace_hardirqs_on_prepare(void) { if (this_cpu_read(tracing_irq_cpu)) { - if (!in_nmi()) - trace_irq_enable(CALLER_ADDR0, CALLER_ADDR1); + trace(irq_enable)(CALLER_ADDR0, CALLER_ADDR1); tracer_hardirqs_on(CALLER_ADDR0, CALLER_ADDR1); this_cpu_write(tracing_irq_cpu, 0); } @@ -40,8 +48,7 @@ NOKPROBE_SYMBOL(trace_hardirqs_on_prepar void trace_hardirqs_on(void) { if (this_cpu_read(tracing_irq_cpu)) { - if (!in_nmi()) - trace_irq_enable_rcuidle(CALLER_ADDR0, CALLER_ADDR1); + trace(irq_enable)(CALLER_ADDR0, CALLER_ADDR1); tracer_hardirqs_on(CALLER_ADDR0, CALLER_ADDR1); this_cpu_write(tracing_irq_cpu, 0); } @@ -63,8 +70,7 @@ void trace_hardirqs_off_finish(void) if (!this_cpu_read(tracing_irq_cpu)) { this_cpu_write(tracing_irq_cpu, 1); tracer_hardirqs_off(CALLER_ADDR0, CALLER_ADDR1); - if (!in_nmi()) - trace_irq_disable(CALLER_ADDR0, CALLER_ADDR1); + trace(irq_disable)(CALLER_ADDR0, CALLER_ADDR1); } } @@ -78,8 +84,7 @@ void trace_hardirqs_off(void) if (!this_cpu_read(tracing_irq_cpu)) { this_cpu_write(tracing_irq_cpu, 1); tracer_hardirqs_off(CALLER_ADDR0, CALLER_ADDR1); - if (!in_nmi()) - trace_irq_disable_rcuidle(CALLER_ADDR0, CALLER_ADDR1); + trace(irq_disable)(CALLER_ADDR0, CALLER_ADDR1); } } EXPORT_SYMBOL(trace_hardirqs_off); From patchwork Thu Jan 12 19:43:50 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 641860 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 64295C678D7 for ; Thu, 12 Jan 2023 20:03:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241082AbjALUC6 (ORCPT ); Thu, 12 Jan 2023 15:02:58 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44160 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233621AbjALT7R (ORCPT ); Thu, 12 Jan 2023 14:59:17 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BEFCB21A1; Thu, 12 Jan 2023 11:58:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=KLAmYUkc5o4iaLgWEzyq0DD4W34Vw8wzkDDZ9nw8rNA=; b=ATY8kiKnvovNgLEm6qSQ1EQvbq whhVrHfsY0Boal85ZRoFmxTUxBK5B9bIvgSX8kVgT6BcX1L66jwQCdPl/BWOSqcQGl2XmwgaBL4PW OKdsLfeNG0cKIyK4qLBg5dTibPOilkbVEo3W2vYUVl/MzGrlgC59H1LNDjakisaklXFACDQXCVqgH X3HA2n0rfn3BN7gYs5ZEmCkrHIhhMF7I5lLP2nRilVRm9iYl7qlU43ypHe2kjKrxVavesmViWu98M YhMWMygFonCR9p+h3EzH9ve+5v/3v/1iCRvb+1bzQnO8SY3rlhjeY9n904kFy8Lg9quCma5so/ETV SIrS144Q==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1pG3he-005Oge-L9; Thu, 12 Jan 2023 19:57:34 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id DFF0E30345A; Thu, 12 Jan 2023 20:57:13 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 3DD3A2CCFB77A; Thu, 12 Jan 2023 20:57:08 +0100 (CET) Message-ID: <20230112195541.538053457@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:50 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 36/51] cpuidle,omap3: Use WFI for omap3_pm_idle() References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org arch_cpu_idle() is a very simple idle interface and exposes only a single idle state and is expected to not require RCU and not do any tracing/instrumentation. As such, omap_sram_idle() is not a valid implementation. Replace it with the simple (shallow) omap3_do_wfi() call. Leaving the more complicated idle states for the cpuidle driver. Signed-off-by: Peter Zijlstra (Intel) Acked-by: Tony Lindgren Acked-by: Rafael J. Wysocki Acked-by: Frederic Weisbecker Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- arch/arm/mach-omap2/pm34xx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/arm/mach-omap2/pm34xx.c +++ b/arch/arm/mach-omap2/pm34xx.c @@ -294,7 +294,7 @@ static void omap3_pm_idle(void) if (omap_irq_pending()) return; - omap_sram_idle(); + omap3_do_wfi(); } #ifdef CONFIG_SUSPEND From patchwork Thu Jan 12 19:43:51 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 641843 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CF351C77B77 for ; Thu, 12 Jan 2023 20:04:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241490AbjALUEC (ORCPT ); Thu, 12 Jan 2023 15:04:02 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44146 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229475AbjALT6Z (ORCPT ); Thu, 12 Jan 2023 14:58:25 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B7C9613A; Thu, 12 Jan 2023 11:57:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=FFPKfQhi1RR6oz0II4O36iNGEMWuMWROzeT05TgEQqM=; b=JZ+QI/RgQjUauwaL2ksV7XDvtk yXgw34Pwm4B9g69COt8t52jvPLD8U5NyLWiRRdKM0FY0qJYUt8ZjMjtE7aR8HRf0YmvAk8o6Nry9C ktxg9uWrn+qRmjWZEq849FVFIY0Wppotwo5JZHAauhqHswoXTB3xuJSkiBBLU92D8FnAUssXxaenr NBjl4elGJPpmwVTGhA5jOAu3Ry5fSaixgKNobBdT2B9UdsxlA6/SoWVOQuJ48xLL5ml3/BmLOy54p ZFeD5cdqc/fGsKQMi3CEpVYrZI3Z4TMs2mv6iHxGU7lNHeP+l+bf+faqkQrIWcrPhX0xx++NJZ3vY xGHbDDvQ==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1pG3hf-005OhY-8x; Thu, 12 Jan 2023 19:57:35 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id E6CB6301D8A; Thu, 12 Jan 2023 20:57:13 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 41DA72CD01200; Thu, 12 Jan 2023 20:57:08 +0100 (CET) Message-ID: <20230112195541.599561742@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:51 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 37/51] cpuidle,omap3: Push RCU-idle into omap_sram_idle() References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org OMAP3 uses full SoC suspend modes as idle states, as such it needs the whole power-domain and clock-domain code from the idle path. All that code is not suitable to run with RCU disabled, as such push RCU-idle deeper still. Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Tony Lindgren Acked-by: Rafael J. Wysocki Acked-by: Frederic Weisbecker Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- arch/arm/mach-omap2/cpuidle34xx.c | 4 +--- arch/arm/mach-omap2/pm.h | 2 +- arch/arm/mach-omap2/pm34xx.c | 12 ++++++++++-- 3 files changed, 12 insertions(+), 6 deletions(-) --- a/arch/arm/mach-omap2/cpuidle34xx.c +++ b/arch/arm/mach-omap2/cpuidle34xx.c @@ -133,9 +133,7 @@ static int omap3_enter_idle(struct cpuid } /* Execute ARM wfi */ - ct_cpuidle_enter(); - omap_sram_idle(); - ct_cpuidle_exit(); + omap_sram_idle(true); /* * Call idle CPU PM enter notifier chain to restore --- a/arch/arm/mach-omap2/pm.h +++ b/arch/arm/mach-omap2/pm.h @@ -29,7 +29,7 @@ static inline int omap4_idle_init(void) extern void *omap3_secure_ram_storage; extern void omap3_pm_off_mode_enable(int); -extern void omap_sram_idle(void); +extern void omap_sram_idle(bool rcuidle); extern int omap_pm_clkdms_setup(struct clockdomain *clkdm, void *unused); #if defined(CONFIG_PM_OPP) --- a/arch/arm/mach-omap2/pm34xx.c +++ b/arch/arm/mach-omap2/pm34xx.c @@ -26,6 +26,7 @@ #include #include #include +#include #include @@ -174,7 +175,7 @@ static int omap34xx_do_sram_idle(unsigne return 0; } -void omap_sram_idle(void) +void omap_sram_idle(bool rcuidle) { /* Variable to tell what needs to be saved and restored * in omap_sram_idle*/ @@ -254,11 +255,18 @@ void omap_sram_idle(void) */ if (save_state) omap34xx_save_context(omap3_arm_context); + + if (rcuidle) + ct_cpuidle_enter(); + if (save_state == 1 || save_state == 3) cpu_suspend(save_state, omap34xx_do_sram_idle); else omap34xx_do_sram_idle(save_state); + if (rcuidle) + ct_cpuidle_exit(); + /* Restore normal SDRC POWER settings */ if (cpu_is_omap3430() && omap_rev() >= OMAP3430_REV_ES3_0 && (omap_type() == OMAP2_DEVICE_TYPE_EMU || @@ -316,7 +324,7 @@ static int omap3_pm_suspend(void) omap3_intc_suspend(); - omap_sram_idle(); + omap_sram_idle(false); restore: /* Restore next_pwrsts */ From patchwork Thu Jan 12 19:43:52 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 642465 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D7C57C678DE for ; Thu, 12 Jan 2023 20:04:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241316AbjALUDe (ORCPT ); Thu, 12 Jan 2023 15:03:34 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44294 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234245AbjALT7S (ORCPT ); Thu, 12 Jan 2023 14:59:18 -0500 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CA5AA25C6; Thu, 12 Jan 2023 11:58:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=ChWtbTrciVV3G1vvtlVpdXBjaP89UEdojcC0eA3JIzQ=; b=Vj4eR6v5IoSn1Hvo9PnZs3VYg5 eCtKCQxf19hmgPBwVt3doBtLDpDlt4hjme9JB10fLus2EOyEcLm2dNpOEYe/PmSAdVs7NKtQ4fB1v DnFTTEYueH7h9Riue4J6yfqqrMyfRORHiXutY4ckZ+kBvMDSdhMCqAoAmttvT26yNoBWvLr1FZZrL 1DanzDdymR2YOb904r+gKaveM3+uzXav2hQukVClXZdyDHyZbZ9hc93EXFjMMHuhL3ivWMdhFuTCN 5nIF57b/9qtsGLX+BjH6aaUs/Y+TqdlqlYJFBnaB8gMFzKZfOp7aBI23toJnxEwScgbbHTsJa+dtf RhM5EDRg==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1pG3hK-0045pc-1a; Thu, 12 Jan 2023 19:57:25 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id E8C9430345F; Thu, 12 Jan 2023 20:57:13 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 45C182CD01216; Thu, 12 Jan 2023 20:57:08 +0100 (CET) Message-ID: <20230112195541.660272394@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:52 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 38/51] cpuidle,omap4: Push RCU-idle into omap4_enter_lowpower() References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org From: Tony Lindgren OMAP4 uses full SoC suspend modes as idle states, as such it needs the whole power-domain and clock-domain code from the idle path. All that code is not suitable to run with RCU disabled, as such push RCU-idle deeper still. Signed-off-by: Tony Lindgren Signed-off-by: Peter Zijlstra (Intel) Acked-by: Rafael J. Wysocki Acked-by: Frederic Weisbecker Tested-by: Tony Lindgren Tested-by: Ulf Hansson Link: https://lkml.kernel.org/r/Yqcv6crSNKuSWoTu@atomide.com --- arch/arm/mach-omap2/common.h | 6 ++++-- arch/arm/mach-omap2/cpuidle44xx.c | 8 ++------ arch/arm/mach-omap2/omap-mpuss-lowpower.c | 12 +++++++++++- arch/arm/mach-omap2/pm44xx.c | 2 +- 4 files changed, 18 insertions(+), 10 deletions(-) --- a/arch/arm/mach-omap2/common.h +++ b/arch/arm/mach-omap2/common.h @@ -284,11 +284,13 @@ extern u32 omap4_get_cpu1_ns_pa_addr(voi #if defined(CONFIG_SMP) && defined(CONFIG_PM) extern int omap4_mpuss_init(void); -extern int omap4_enter_lowpower(unsigned int cpu, unsigned int power_state); +extern int omap4_enter_lowpower(unsigned int cpu, unsigned int power_state, + bool rcuidle); extern int omap4_hotplug_cpu(unsigned int cpu, unsigned int power_state); #else static inline int omap4_enter_lowpower(unsigned int cpu, - unsigned int power_state) + unsigned int power_state, + bool rcuidle) { cpu_do_idle(); return 0; --- a/arch/arm/mach-omap2/cpuidle44xx.c +++ b/arch/arm/mach-omap2/cpuidle44xx.c @@ -105,9 +105,7 @@ static int omap_enter_idle_smp(struct cp } raw_spin_unlock_irqrestore(&mpu_lock, flag); - ct_cpuidle_enter(); - omap4_enter_lowpower(dev->cpu, cx->cpu_state); - ct_cpuidle_exit(); + omap4_enter_lowpower(dev->cpu, cx->cpu_state, true); raw_spin_lock_irqsave(&mpu_lock, flag); if (cx->mpu_state_vote == num_online_cpus()) @@ -186,10 +184,8 @@ static int omap_enter_idle_coupled(struc } } - ct_cpuidle_enter(); - omap4_enter_lowpower(dev->cpu, cx->cpu_state); + omap4_enter_lowpower(dev->cpu, cx->cpu_state, true); cpu_done[dev->cpu] = true; - ct_cpuidle_exit(); /* Wakeup CPU1 only if it is not offlined */ if (dev->cpu == 0 && cpumask_test_cpu(1, cpu_online_mask)) { --- a/arch/arm/mach-omap2/omap-mpuss-lowpower.c +++ b/arch/arm/mach-omap2/omap-mpuss-lowpower.c @@ -33,6 +33,7 @@ * and first to wake-up when MPUSS low power states are excercised */ +#include #include #include #include @@ -214,6 +215,7 @@ static void __init save_l2x0_context(voi * of OMAP4 MPUSS subsystem * @cpu : CPU ID * @power_state: Low power state. + * @rcuidle: RCU needs to be idled * * MPUSS states for the context save: * save_state = @@ -222,7 +224,8 @@ static void __init save_l2x0_context(voi * 2 - CPUx L1 and logic lost + GIC lost: MPUSS OSWR * 3 - CPUx L1 and logic lost + GIC + L2 lost: DEVICE OFF */ -int omap4_enter_lowpower(unsigned int cpu, unsigned int power_state) +int omap4_enter_lowpower(unsigned int cpu, unsigned int power_state, + bool rcuidle) { struct omap4_cpu_pm_info *pm_info = &per_cpu(omap4_pm_info, cpu); unsigned int save_state = 0, cpu_logic_state = PWRDM_POWER_RET; @@ -268,6 +271,10 @@ int omap4_enter_lowpower(unsigned int cp cpu_clear_prev_logic_pwrst(cpu); pwrdm_set_next_pwrst(pm_info->pwrdm, power_state); pwrdm_set_logic_retst(pm_info->pwrdm, cpu_logic_state); + + if (rcuidle) + ct_cpuidle_enter(); + set_cpu_wakeup_addr(cpu, __pa_symbol(omap_pm_ops.resume)); omap_pm_ops.scu_prepare(cpu, power_state); l2x0_pwrst_prepare(cpu, save_state); @@ -283,6 +290,9 @@ int omap4_enter_lowpower(unsigned int cp if (IS_PM44XX_ERRATUM(PM_OMAP4_ROM_SMP_BOOT_ERRATUM_GICD) && cpu) gic_dist_enable(); + if (rcuidle) + ct_cpuidle_exit(); + /* * Restore the CPUx power state to ON otherwise CPUx * power domain can transitions to programmed low power --- a/arch/arm/mach-omap2/pm44xx.c +++ b/arch/arm/mach-omap2/pm44xx.c @@ -76,7 +76,7 @@ static int omap4_pm_suspend(void) * domain CSWR is not supported by hardware. * More details can be found in OMAP4430 TRM section 4.3.4.2. */ - omap4_enter_lowpower(cpu_id, cpu_suspend_state); + omap4_enter_lowpower(cpu_id, cpu_suspend_state, false); /* Restore next powerdomain state */ list_for_each_entry(pwrst, &pwrst_list, node) { From patchwork Thu Jan 12 19:43:53 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 641848 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 909AFC63797 for ; Thu, 12 Jan 2023 20:04:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241355AbjALUDs (ORCPT ); Thu, 12 Jan 2023 15:03:48 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44234 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232194AbjALT7T (ORCPT ); Thu, 12 Jan 2023 14:59:19 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6A3522623; Thu, 12 Jan 2023 11:58:08 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=xUXFMmNjQb3UrGtSZK0a2nhjQSuKqnZvrBUrV/kGZ/M=; b=azd0lEFhtyA7/aLM4gfZG1Cdp3 7NU3r969okzjxqcSyuA1vE+R2WnLvkbW43aMYTQl8A+OMQs4BGyVUe/mdDDkYK4sq5GuqaMDdK3nQ mF4/8WjcxS6GyrdwizZfZHi98CgxEnfqDyYYUuh6dsDEfNM6pZY3bv79cj1EUtiafbAvbGi3Zoodv q3oyyOIbvVtD0Z25JQmgF9Yy3twtU782/WTN1SiAuh8rW47DB3F8jKxk6GeMuzzcUytvUZ3k5qQN2 xwJHT13n8NNxGibRxm8fKw3yFq3ZFyd8yvfAHp0jp7adZU6B9GTx3x5QVwVeGWFHBoGHyIY8F3WG5 EkCNyHWg==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1pG3hg-005OjH-AW; Thu, 12 Jan 2023 19:57:36 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id EDBC9303462; Thu, 12 Jan 2023 20:57:13 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 49A802CD0121F; Thu, 12 Jan 2023 20:57:08 +0100 (CET) Message-ID: <20230112195541.721697850@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:53 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 39/51] arm,omap2: Use WFI for omap2_pm_idle() References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org arch_cpu_idle() is a very simple idle interface and exposes only a single idle state and is expected to not require RCU and not do any tracing/instrumentation. As such, omap2_pm_idle() is not a valid implementation. Replace it with a simple (shallow) omap2_do_wfi() call. Omap2 doesn't have a cpuidle driver; but adding one would be the recourse to (re)gain the other idle states. Suggested-by: Tony Lindgren Signed-off-by: Peter Zijlstra (Intel) Acked-by: Rafael J. Wysocki Acked-by: Frederic Weisbecker Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- arch/arm/mach-omap2/pm24xx.c | 51 +------------------------------------------ 1 file changed, 2 insertions(+), 49 deletions(-) --- a/arch/arm/mach-omap2/pm24xx.c +++ b/arch/arm/mach-omap2/pm24xx.c @@ -116,50 +116,12 @@ static int omap2_enter_full_retention(vo static int sti_console_enabled; -static int omap2_allow_mpu_retention(void) -{ - if (!omap2xxx_cm_mpu_retention_allowed()) - return 0; - if (sti_console_enabled) - return 0; - - return 1; -} - -static void omap2_enter_mpu_retention(void) +static void omap2_do_wfi(void) { const int zero = 0; - /* The peripherals seem not to be able to wake up the MPU when - * it is in retention mode. */ - if (omap2_allow_mpu_retention()) { - /* REVISIT: These write to reserved bits? */ - omap_prm_clear_mod_irqs(CORE_MOD, PM_WKST1, ~0); - omap_prm_clear_mod_irqs(CORE_MOD, OMAP24XX_PM_WKST2, ~0); - omap_prm_clear_mod_irqs(WKUP_MOD, PM_WKST, ~0); - - /* Try to enter MPU retention */ - pwrdm_set_next_pwrst(mpu_pwrdm, PWRDM_POWER_RET); - - } else { - /* Block MPU retention */ - pwrdm_set_next_pwrst(mpu_pwrdm, PWRDM_POWER_ON); - } - /* WFI */ asm("mcr p15, 0, %0, c7, c0, 4" : : "r" (zero) : "memory", "cc"); - - pwrdm_set_next_pwrst(mpu_pwrdm, PWRDM_POWER_ON); -} - -static int omap2_can_sleep(void) -{ - if (omap2xxx_cm_fclks_active()) - return 0; - if (__clk_is_enabled(osc_ck)) - return 0; - - return 1; } static void omap2_pm_idle(void) @@ -169,16 +131,7 @@ static void omap2_pm_idle(void) if (omap_irq_pending()) return; - error = cpu_cluster_pm_enter(); - if (error || !omap2_can_sleep()) { - omap2_enter_mpu_retention(); - goto out_cpu_cluster_pm; - } - - omap2_enter_full_retention(); - -out_cpu_cluster_pm: - cpu_cluster_pm_exit(); + omap2_do_wfi(); } static void __init prcm_setup_regs(void) From patchwork Thu Jan 12 19:43:54 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 642472 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 86AC4C678D4 for ; Thu, 12 Jan 2023 20:03:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241132AbjALUDO (ORCPT ); Thu, 12 Jan 2023 15:03:14 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44330 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238181AbjALT7U (ORCPT ); Thu, 12 Jan 2023 14:59:20 -0500 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 265403882; Thu, 12 Jan 2023 11:58:13 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=4aFpXbTN+2q/sQWoIhQXRuBIzQdX59WKAp/kjFjx5nI=; b=EXFl9MaMND0FkMicNKlfspElVB huiMp2O7+Fvk4uwlSWk2b77yH7f4axNULDLOvrmgF2stY4NTNGRJ25ZSpXd9goBg/VkJdWWaXP+Gr Of7rP+CRWQSMlE+dfMMiwNu6KPhGmNs+/4kt/1x2eSDBQGLkb7G0JxjG3bjP6egK+5K3BYl2NDXSI EWmjrlA8t5XxbT818dX7+Vt3AqBBUhu093wyPACd2zLypjFT7H2JDrsNcfcD/XHM7W3wj7ZN5Nh6N zG0q4ipZCd55Lg30zpCT0GHj8smeXMq8oSjlRgA598BxbO+Tnb+HSoRDuOLJvyhSzEi1pRgNhbbQw 1dyt/7Iw==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1pG3hL-0045pn-36; Thu, 12 Jan 2023 19:57:26 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 04574303466; Thu, 12 Jan 2023 20:57:14 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 4EBB62CD066D0; Thu, 12 Jan 2023 20:57:08 +0100 (CET) Message-ID: <20230112195541.782536366@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:54 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, Ulf Hansson , "Rafael J. Wysocki" Subject: [PATCH v3 40/51] cpuidle,powerdomain: Remove trace_.*_rcuidle() References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org OMAP was the one and only user. Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Ulf Hansson Acked-by: Rafael J. Wysocki Acked-by: Frederic Weisbecker Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- arch/arm/mach-omap2/powerdomain.c | 10 +++++----- drivers/base/power/runtime.c | 24 ++++++++++++------------ 2 files changed, 17 insertions(+), 17 deletions(-) --- a/arch/arm/mach-omap2/powerdomain.c +++ b/arch/arm/mach-omap2/powerdomain.c @@ -187,9 +187,9 @@ static int _pwrdm_state_switch(struct po trace_state = (PWRDM_TRACE_STATES_FLAG | ((next & OMAP_POWERSTATE_MASK) << 8) | ((prev & OMAP_POWERSTATE_MASK) << 0)); - trace_power_domain_target_rcuidle(pwrdm->name, - trace_state, - raw_smp_processor_id()); + trace_power_domain_target(pwrdm->name, + trace_state, + raw_smp_processor_id()); } break; default: @@ -541,8 +541,8 @@ int pwrdm_set_next_pwrst(struct powerdom if (arch_pwrdm && arch_pwrdm->pwrdm_set_next_pwrst) { /* Trace the pwrdm desired target state */ - trace_power_domain_target_rcuidle(pwrdm->name, pwrst, - raw_smp_processor_id()); + trace_power_domain_target(pwrdm->name, pwrst, + raw_smp_processor_id()); /* Program the pwrdm desired target state */ ret = arch_pwrdm->pwrdm_set_next_pwrst(pwrdm, pwrst); } --- a/drivers/base/power/runtime.c +++ b/drivers/base/power/runtime.c @@ -442,7 +442,7 @@ static int rpm_idle(struct device *dev, int (*callback)(struct device *); int retval; - trace_rpm_idle_rcuidle(dev, rpmflags); + trace_rpm_idle(dev, rpmflags); retval = rpm_check_suspend_allowed(dev); if (retval < 0) ; /* Conditions are wrong. */ @@ -481,7 +481,7 @@ static int rpm_idle(struct device *dev, dev->power.request_pending = true; queue_work(pm_wq, &dev->power.work); } - trace_rpm_return_int_rcuidle(dev, _THIS_IP_, 0); + trace_rpm_return_int(dev, _THIS_IP_, 0); return 0; } @@ -493,7 +493,7 @@ static int rpm_idle(struct device *dev, wake_up_all(&dev->power.wait_queue); out: - trace_rpm_return_int_rcuidle(dev, _THIS_IP_, retval); + trace_rpm_return_int(dev, _THIS_IP_, retval); return retval ? retval : rpm_suspend(dev, rpmflags | RPM_AUTO); } @@ -557,7 +557,7 @@ static int rpm_suspend(struct device *de struct device *parent = NULL; int retval; - trace_rpm_suspend_rcuidle(dev, rpmflags); + trace_rpm_suspend(dev, rpmflags); repeat: retval = rpm_check_suspend_allowed(dev); @@ -708,7 +708,7 @@ static int rpm_suspend(struct device *de } out: - trace_rpm_return_int_rcuidle(dev, _THIS_IP_, retval); + trace_rpm_return_int(dev, _THIS_IP_, retval); return retval; @@ -760,7 +760,7 @@ static int rpm_resume(struct device *dev struct device *parent = NULL; int retval = 0; - trace_rpm_resume_rcuidle(dev, rpmflags); + trace_rpm_resume(dev, rpmflags); repeat: if (dev->power.runtime_error) { @@ -925,7 +925,7 @@ static int rpm_resume(struct device *dev spin_lock_irq(&dev->power.lock); } - trace_rpm_return_int_rcuidle(dev, _THIS_IP_, retval); + trace_rpm_return_int(dev, _THIS_IP_, retval); return retval; } @@ -1081,7 +1081,7 @@ int __pm_runtime_idle(struct device *dev if (retval < 0) { return retval; } else if (retval > 0) { - trace_rpm_usage_rcuidle(dev, rpmflags); + trace_rpm_usage(dev, rpmflags); return 0; } } @@ -1119,7 +1119,7 @@ int __pm_runtime_suspend(struct device * if (retval < 0) { return retval; } else if (retval > 0) { - trace_rpm_usage_rcuidle(dev, rpmflags); + trace_rpm_usage(dev, rpmflags); return 0; } } @@ -1202,7 +1202,7 @@ int pm_runtime_get_if_active(struct devi } else { retval = atomic_inc_not_zero(&dev->power.usage_count); } - trace_rpm_usage_rcuidle(dev, 0); + trace_rpm_usage(dev, 0); spin_unlock_irqrestore(&dev->power.lock, flags); return retval; @@ -1566,7 +1566,7 @@ void pm_runtime_allow(struct device *dev if (ret == 0) rpm_idle(dev, RPM_AUTO | RPM_ASYNC); else if (ret > 0) - trace_rpm_usage_rcuidle(dev, RPM_AUTO | RPM_ASYNC); + trace_rpm_usage(dev, RPM_AUTO | RPM_ASYNC); out: spin_unlock_irq(&dev->power.lock); @@ -1635,7 +1635,7 @@ static void update_autosuspend(struct de atomic_inc(&dev->power.usage_count); rpm_resume(dev, 0); } else { - trace_rpm_usage_rcuidle(dev, 0); + trace_rpm_usage(dev, 0); } } From patchwork Thu Jan 12 19:43:55 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 641844 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2BE0CC77B74 for ; Thu, 12 Jan 2023 20:04:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241476AbjALUEB (ORCPT ); Thu, 12 Jan 2023 15:04:01 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44164 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235011AbjALT7T (ORCPT ); Thu, 12 Jan 2023 14:59:19 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9D8932628; Thu, 12 Jan 2023 11:58:08 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=uRuk42rt5J1sC1gDxlIXH9yiXjv0To5K12rtksbRl/w=; b=t/UiPYxuyWmQWx8O0dR9C23N3m Mql6RINO7N/qRFk28GXmIaup0931S2z3tF2gEI6MdQoOij/5MpyDJ93PUuH63HNR9QrPHDhJ1A8Oe r91ZkV6InpQFSdpdFg3os7aK02j12nsV24WSxmRJS0kKIVWjbMkU1+JaWypkF/gcgNI0Sb9wRM3lG Y69ujB959knJ2g9LZcv0UARehKAkTXfDsgP2i97QLaacDdXSmeuMauSIsBiYlC/jtcpwExNGPGi8i BrnpvX+u+TK0Yw2Bq1R5xaqa8UPNBlfJNWX8kZy4zpct/I/IMQgjZfiEDib73CDf0Fj9tlY/FPeci GndVoLoA==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1pG3hh-005Ok6-0o; Thu, 12 Jan 2023 19:57:37 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 0662A303469; Thu, 12 Jan 2023 20:57:14 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 520F42CD066C8; Thu, 12 Jan 2023 20:57:08 +0100 (CET) Message-ID: <20230112195541.844982902@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:55 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, Ulf Hansson , "Rafael J. Wysocki" Subject: [PATCH v3 41/51] cpuidle,clk: Remove trace_.*_rcuidle() References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org OMAP was the one and only user. Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Ulf Hansson Acked-by: Rafael J. Wysocki Acked-by: Frederic Weisbecker Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- drivers/clk/clk.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -978,12 +978,12 @@ static void clk_core_disable(struct clk_ if (--core->enable_count > 0) return; - trace_clk_disable_rcuidle(core); + trace_clk_disable(core); if (core->ops->disable) core->ops->disable(core->hw); - trace_clk_disable_complete_rcuidle(core); + trace_clk_disable_complete(core); clk_core_disable(core->parent); } @@ -1037,12 +1037,12 @@ static int clk_core_enable(struct clk_co if (ret) return ret; - trace_clk_enable_rcuidle(core); + trace_clk_enable(core); if (core->ops->enable) ret = core->ops->enable(core->hw); - trace_clk_enable_complete_rcuidle(core); + trace_clk_enable_complete(core); if (ret) { clk_core_disable(core->parent); From patchwork Thu Jan 12 19:43:56 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 642460 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7FDD4C74A44 for ; Thu, 12 Jan 2023 20:04:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241399AbjALUDx (ORCPT ); Thu, 12 Jan 2023 15:03:53 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44148 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232876AbjALT7P (ORCPT ); Thu, 12 Jan 2023 14:59:15 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EE05A109D; Thu, 12 Jan 2023 11:58:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=tM6S3oZ3zLjQ2zmmTNKitB7HqpfpXnjxYwChM2FqbVs=; b=BJ9XJoRA5PVXo6NmK1y1j4mgxX DGfe1Ta896F3qkk57KxqOit856Whx7pXr9WTIch0khohftRzZ6nkeSuCiqiAyMa3qg2JMRqTwkdcK SZHkiVrlqToqnjdTi1BQtMwas89d1b41aRk7eR9kktg5N/gi7TNwV9TPbfoKKOtW1UuX+e5CZ4VVW USTGfBuu27oryL5tL5ug+EeZMBWzLYDuLZxBl37/OJYoY11N2gX+VEM60a0w4sEUZTi5GdGd5oNiD v4tH8MxJ/EqxydLuQw6fRM3cmCP9pHy61QtCS2aoYs8Sik/mr9QPx70CAPy2SGTADTK3V7C39icf4 nbFCLrEQ==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1pG3hi-005Ol3-7R; Thu, 12 Jan 2023 19:57:38 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 1047330346D; Thu, 12 Jan 2023 20:57:14 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 573AE2CD066CC; Thu, 12 Jan 2023 20:57:08 +0100 (CET) Message-ID: <20230112195541.906007455@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:56 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 42/51] ubsan: Fix objtool UACCESS warns References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org clang-14 allyesconfig gives: vmlinux.o: warning: objtool: emulator_cmpxchg_emulated+0x705: call to __ubsan_handle_load_invalid_value() with UACCESS enabled vmlinux.o: warning: objtool: paging64_update_accessed_dirty_bits+0x39e: call to __ubsan_handle_load_invalid_value() with UACCESS enabled vmlinux.o: warning: objtool: paging32_update_accessed_dirty_bits+0x390: call to __ubsan_handle_load_invalid_value() with UACCESS enabled vmlinux.o: warning: objtool: ept_update_accessed_dirty_bits+0x43f: call to __ubsan_handle_load_invalid_value() with UACCESS enabled Add the required eflags save/restore and whitelist the thing. Signed-off-by: Peter Zijlstra (Intel) Acked-by: Rafael J. Wysocki Acked-by: Frederic Weisbecker Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- lib/ubsan.c | 5 ++++- tools/objtool/check.c | 1 + 2 files changed, 5 insertions(+), 1 deletion(-) --- a/lib/ubsan.c +++ b/lib/ubsan.c @@ -340,9 +340,10 @@ void __ubsan_handle_load_invalid_value(v { struct invalid_value_data *data = _data; char val_str[VALUE_LENGTH]; + unsigned long ua_flags = user_access_save(); if (suppress_report(&data->location)) - return; + goto out; ubsan_prologue(&data->location, "invalid-load"); @@ -352,6 +353,8 @@ void __ubsan_handle_load_invalid_value(v val_str, data->type->type_name); ubsan_epilogue(); +out: + user_access_restore(ua_flags); } EXPORT_SYMBOL(__ubsan_handle_load_invalid_value); --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -1068,6 +1068,7 @@ static const char *uaccess_safe_builtin[ "__ubsan_handle_type_mismatch", "__ubsan_handle_type_mismatch_v1", "__ubsan_handle_shift_out_of_bounds", + "__ubsan_handle_load_invalid_value", /* misc */ "csum_partial_copy_generic", "copy_mc_fragile", From patchwork Thu Jan 12 19:43:57 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 642462 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9BBF0C71157 for ; Thu, 12 Jan 2023 20:04:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241363AbjALUDu (ORCPT ); Thu, 12 Jan 2023 15:03:50 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44318 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237286AbjALT7U (ORCPT ); Thu, 12 Jan 2023 14:59:20 -0500 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 62E5F2DE8; Thu, 12 Jan 2023 11:58:11 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=JTqeKYECYSubBnJX/J9QEXdDkgA0NkIECFSZWgBtZ5c=; b=Bz7q8sFysVrJ+qtuhahBXb/Lab 5j8XAIyOlOfJ4KikOFYWZKZdHI7rMXfaG+faM2dOEPZ9nv8ZEhxsgK1wIIhAhZqm+PcmRRep500ve YZevbAQg2/uTP2amFaBshSo0Mlhs5hJfCpbYdKYEsfbUoDPlGcS/urMFlIgoVKsG98QYMkN18IGdT z5GHZqMDB9lYeNqIBvRG7PG4iBenea3s9AxTRSg4/aj43YQXFRi/ink2Xr4nHrniaxNtLTRiCBghP vlMN4LFj9qBDiL1lPWuGU/Tv0ulIHIVuBnmVRmKNT37An3OMOuY9Rk3xwDkd8UCZzZTO2VvOqCMAP DOsNio+Q==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1pG3hN-0045qQ-0k; Thu, 12 Jan 2023 19:57:29 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 1C7DB30346F; Thu, 12 Jan 2023 20:57:14 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 5B5522CD066C2; Thu, 12 Jan 2023 20:57:08 +0100 (CET) Message-ID: <20230112195541.967699392@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:57 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 43/51] intel_idle: Add force_irq_on module param References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org For testing purposes. Signed-off-by: Peter Zijlstra (Intel) Acked-by: Rafael J. Wysocki Acked-by: Frederic Weisbecker Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- drivers/idle/intel_idle.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) --- a/drivers/idle/intel_idle.c +++ b/drivers/idle/intel_idle.c @@ -1787,6 +1787,9 @@ static bool __init intel_idle_verify_cst return true; } +static bool force_irq_on __read_mostly; +module_param(force_irq_on, bool, 0444); + static void __init intel_idle_init_cstates_icpu(struct cpuidle_driver *drv) { int cstate; @@ -1838,8 +1841,10 @@ static void __init intel_idle_init_cstat /* Structure copy. */ drv->states[drv->state_count] = cpuidle_state_table[cstate]; - if (cpuidle_state_table[cstate].flags & CPUIDLE_FLAG_IRQ_ENABLE) + if ((cpuidle_state_table[cstate].flags & CPUIDLE_FLAG_IRQ_ENABLE) || force_irq_on) { + printk("intel_idle: forced intel_idle_irq for state %d\n", cstate); drv->states[drv->state_count].enter = intel_idle_irq; + } if (cpu_feature_enabled(X86_FEATURE_KERNEL_IBRS) && cpuidle_state_table[cstate].flags & CPUIDLE_FLAG_IBRS) { From patchwork Thu Jan 12 19:43:58 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 641845 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 863F9C678DA for ; Thu, 12 Jan 2023 20:04:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241427AbjALUDz (ORCPT ); Thu, 12 Jan 2023 15:03:55 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44148 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239134AbjALT7V (ORCPT ); Thu, 12 Jan 2023 14:59:21 -0500 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6AEDE389D; Thu, 12 Jan 2023 11:58:19 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=GvwbGFmvCEUlvMDtuRKKain2RkezywAYf/go7N4onKI=; b=UZP1WhwWXNKsSNjUZl7FaNdKCn ddEQs2bPXQi5qPjj7qlJxw/QPW/0nxOgZLN8xBPDMZ/1zjz4Cj4cBDEZBuYnBOjn9uMSnfZ/x7+2I 9dTh9PKCvuDC56aeAA3cL71DKDuGL799xQcS7MxhLz5jtlqRv3ljsfno7QvEUZeBL/ZKqQpiu6eX8 1n/CZuVsNYoC/48UeqqLacX54nCFrLom4QSa5qKlMYqjjQVNzfHjWkBbeNM7/Bwfq6S/ww+f2nN0u 0BjGg5qo+ibAucyPfwz5pwvtUQ9FofzqrnD212u/gvXOr0euOanteiang6T+NsdgqQ3BiJZ1d+Ozd /GvjuQPw==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1pG3hO-0045qe-0S; Thu, 12 Jan 2023 19:57:37 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 2274B303473; Thu, 12 Jan 2023 20:57:14 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 5F8C02CD066D4; Thu, 12 Jan 2023 20:57:08 +0100 (CET) Message-ID: <20230112195542.028523143@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:58 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 44/51] entry,kasan,x86: Disallow overriding mem*() functions References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org KASAN cannot just hijack the mem*() functions, it needs to emit __asan_mem*() variants if it wants instrumentation (other sanitizers already do this). vmlinux.o: warning: objtool: sync_regs+0x24: call to memcpy() leaves .noinstr.text section vmlinux.o: warning: objtool: vc_switch_off_ist+0xbe: call to memcpy() leaves .noinstr.text section vmlinux.o: warning: objtool: fixup_bad_iret+0x36: call to memset() leaves .noinstr.text section vmlinux.o: warning: objtool: __sev_get_ghcb+0xa0: call to memcpy() leaves .noinstr.text section vmlinux.o: warning: objtool: __sev_put_ghcb+0x35: call to memcpy() leaves .noinstr.text section Remove the weak aliases to ensure nobody hijacks these functions and add them to the noinstr section. Signed-off-by: Peter Zijlstra (Intel) Acked-by: Rafael J. Wysocki Acked-by: Frederic Weisbecker Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- arch/x86/lib/memcpy_64.S | 5 ++--- arch/x86/lib/memmove_64.S | 4 +++- arch/x86/lib/memset_64.S | 4 +++- mm/kasan/kasan.h | 4 ++++ mm/kasan/shadow.c | 38 ++++++++++++++++++++++++++++++++++++++ tools/objtool/check.c | 3 +++ 6 files changed, 53 insertions(+), 5 deletions(-) --- a/arch/x86/lib/memcpy_64.S +++ b/arch/x86/lib/memcpy_64.S @@ -7,7 +7,7 @@ #include #include -.pushsection .noinstr.text, "ax" +.section .noinstr.text, "ax" /* * We build a jump to memcpy_orig by default which gets NOPped out on @@ -42,7 +42,7 @@ SYM_FUNC_START(__memcpy) SYM_FUNC_END(__memcpy) EXPORT_SYMBOL(__memcpy) -SYM_FUNC_ALIAS_WEAK(memcpy, __memcpy) +SYM_FUNC_ALIAS(memcpy, __memcpy) EXPORT_SYMBOL(memcpy) /* @@ -183,4 +183,3 @@ SYM_FUNC_START_LOCAL(memcpy_orig) RET SYM_FUNC_END(memcpy_orig) -.popsection --- a/arch/x86/lib/memmove_64.S +++ b/arch/x86/lib/memmove_64.S @@ -13,6 +13,8 @@ #undef memmove +.section .noinstr.text, "ax" + /* * Implement memmove(). This can handle overlap between src and dst. * @@ -213,5 +215,5 @@ SYM_FUNC_START(__memmove) SYM_FUNC_END(__memmove) EXPORT_SYMBOL(__memmove) -SYM_FUNC_ALIAS_WEAK(memmove, __memmove) +SYM_FUNC_ALIAS(memmove, __memmove) EXPORT_SYMBOL(memmove) --- a/arch/x86/lib/memset_64.S +++ b/arch/x86/lib/memset_64.S @@ -6,6 +6,8 @@ #include #include +.section .noinstr.text, "ax" + /* * ISO C memset - set a memory block to a byte value. This function uses fast * string to get better performance than the original function. The code is @@ -43,7 +45,7 @@ SYM_FUNC_START(__memset) SYM_FUNC_END(__memset) EXPORT_SYMBOL(__memset) -SYM_FUNC_ALIAS_WEAK(memset, __memset) +SYM_FUNC_ALIAS(memset, __memset) EXPORT_SYMBOL(memset) /* --- a/mm/kasan/kasan.h +++ b/mm/kasan/kasan.h @@ -551,6 +551,10 @@ void __asan_set_shadow_f3(const void *ad void __asan_set_shadow_f5(const void *addr, size_t size); void __asan_set_shadow_f8(const void *addr, size_t size); +void *__asan_memset(void *addr, int c, size_t len); +void *__asan_memmove(void *dest, const void *src, size_t len); +void *__asan_memcpy(void *dest, const void *src, size_t len); + void __hwasan_load1_noabort(unsigned long addr); void __hwasan_store1_noabort(unsigned long addr); void __hwasan_load2_noabort(unsigned long addr); --- a/mm/kasan/shadow.c +++ b/mm/kasan/shadow.c @@ -38,6 +38,12 @@ bool __kasan_check_write(const volatile } EXPORT_SYMBOL(__kasan_check_write); +#ifndef CONFIG_GENERIC_ENTRY +/* + * CONFIG_GENERIC_ENTRY relies on compiler emitted mem*() calls to not be + * instrumented. KASAN enabled toolchains should emit __asan_mem*() functions + * for the sites they want to instrument. + */ #undef memset void *memset(void *addr, int c, size_t len) { @@ -68,6 +74,38 @@ void *memcpy(void *dest, const void *src return __memcpy(dest, src, len); } +#endif + +void *__asan_memset(void *addr, int c, size_t len) +{ + if (!kasan_check_range((unsigned long)addr, len, true, _RET_IP_)) + return NULL; + + return __memset(addr, c, len); +} +EXPORT_SYMBOL(__asan_memset); + +#ifdef __HAVE_ARCH_MEMMOVE +void *__asan_memmove(void *dest, const void *src, size_t len) +{ + if (!kasan_check_range((unsigned long)src, len, false, _RET_IP_) || + !kasan_check_range((unsigned long)dest, len, true, _RET_IP_)) + return NULL; + + return __memmove(dest, src, len); +} +EXPORT_SYMBOL(__asan_memmove); +#endif + +void *__asan_memcpy(void *dest, const void *src, size_t len) +{ + if (!kasan_check_range((unsigned long)src, len, false, _RET_IP_) || + !kasan_check_range((unsigned long)dest, len, true, _RET_IP_)) + return NULL; + + return __memcpy(dest, src, len); +} +EXPORT_SYMBOL(__asan_memcpy); void kasan_poison(const void *addr, size_t size, u8 value, bool init) { --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -956,6 +956,9 @@ static const char *uaccess_safe_builtin[ "__asan_store16_noabort", "__kasan_check_read", "__kasan_check_write", + "__asan_memset", + "__asan_memmove", + "__asan_memcpy", /* KASAN in-line */ "__asan_report_load_n_noabort", "__asan_report_load1_noabort", From patchwork Thu Jan 12 19:43:59 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 641857 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 39885C61DB3 for ; Thu, 12 Jan 2023 20:03:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241149AbjALUDP (ORCPT ); Thu, 12 Jan 2023 15:03:15 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44324 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238021AbjALT7U (ORCPT ); Thu, 12 Jan 2023 14:59:20 -0500 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B95412DFB; Thu, 12 Jan 2023 11:58:12 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=TpAs8eQceCyyKKtR//95dieD+m+uPCJ6EEXd6r5ehjs=; b=J/iheh/14zhPmaufDS5gfS7C9G AMC54p6I745RD8leo3+54c80XhX3K8Ht527YxdKMeA8JPiynUtZHcgLiDMDTyfQfyXTte8HgNqCa6 pKhb/ZH7HNZ/MT9DIaM3NRDuMboCDf6X/BQC2vWQuf6Yx5m3LDhGEb+DNxiCyLpi8PKansOw9QX1f zJsLvav4cyq2tXB5lMxS1JE9P2dq/WeoFpns6yBYvRo1E5o+D2IUezK1YtNks8ScR/gYldKeFcZI1 TaczsRiG8nXqGnvZqQmaexVSP6rx1bz5zOVXNJdHh7BYjHf12RB3e9H/wBT7iWUyW7PpEYDHmNxqy EYhalTXA==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1pG3hX-0045uu-0P; Thu, 12 Jan 2023 19:57:33 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 2C83F303476; Thu, 12 Jan 2023 20:57:14 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 6405E2CD066D8; Thu, 12 Jan 2023 20:57:08 +0100 (CET) Message-ID: <20230112195542.089981974@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:43:59 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 45/51] sched: Always inline __this_cpu_preempt_check() References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org vmlinux.o: warning: objtool: in_entry_stack+0x9: call to __this_cpu_preempt_check() leaves .noinstr.text section vmlinux.o: warning: objtool: default_do_nmi+0x10: call to __this_cpu_preempt_check() leaves .noinstr.text section vmlinux.o: warning: objtool: fpu_idle_fpregs+0x41: call to __this_cpu_preempt_check() leaves .noinstr.text section vmlinux.o: warning: objtool: kvm_read_and_reset_apf_flags+0x1: call to __this_cpu_preempt_check() leaves .noinstr.text section vmlinux.o: warning: objtool: lockdep_hardirqs_on+0xb0: call to __this_cpu_preempt_check() leaves .noinstr.text section vmlinux.o: warning: objtool: lockdep_hardirqs_off+0xae: call to __this_cpu_preempt_check() leaves .noinstr.text section vmlinux.o: warning: objtool: irqentry_nmi_enter+0x69: call to __this_cpu_preempt_check() leaves .noinstr.text section vmlinux.o: warning: objtool: irqentry_nmi_exit+0x32: call to __this_cpu_preempt_check() leaves .noinstr.text section vmlinux.o: warning: objtool: acpi_processor_ffh_cstate_enter+0x9: call to __this_cpu_preempt_check() leaves .noinstr.text section vmlinux.o: warning: objtool: acpi_idle_enter+0x43: call to __this_cpu_preempt_check() leaves .noinstr.text section vmlinux.o: warning: objtool: acpi_idle_enter_s2idle+0x45: call to __this_cpu_preempt_check() leaves .noinstr.text section Signed-off-by: Peter Zijlstra (Intel) Acked-by: Rafael J. Wysocki Acked-by: Frederic Weisbecker Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- include/linux/percpu-defs.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/include/linux/percpu-defs.h +++ b/include/linux/percpu-defs.h @@ -310,7 +310,7 @@ extern void __bad_size_call_parameter(vo #ifdef CONFIG_DEBUG_PREEMPT extern void __this_cpu_preempt_check(const char *op); #else -static inline void __this_cpu_preempt_check(const char *op) { } +static __always_inline void __this_cpu_preempt_check(const char *op) { } #endif #define __pcpu_size_call_return(stem, variable) \ From patchwork Thu Jan 12 19:44:00 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 642461 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EDBC0C7618D for ; Thu, 12 Jan 2023 20:04:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241415AbjALUDy (ORCPT ); Thu, 12 Jan 2023 15:03:54 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44220 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238082AbjALT7U (ORCPT ); Thu, 12 Jan 2023 14:59:20 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 112523880; Thu, 12 Jan 2023 11:58:13 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=ljNIHChdlymEt0s4DtY+Ji5/5ZFr1jFKrzucPLjcAFA=; b=UFhO8sQycbOykP9WLmHLr8syH1 9tKpgf+RH4+2oIWu+p1NsZyG1ZQUQEWQKyB7rZeJqKLqT/EpPMTLJSHpi/eniYQI6kNhYX80bC7rp v4DYtLIywV5PM3hyi+6d9VreCBIfyUq0bOE4EJwgP1PAPqwc5ULRKbQuNPzHKcYXFJ+bhA18Sk3BK 0SHi+ZzW5d72kp/7epWf2U0Zao67mw1W6KZFzu9PuzdtQCB/RZo73P/7KFSV/9Z+EgMtlu14sgzCt LY3p+teRO7dsISyeJIOJS/fTB2tiC6ZycPsflBP3cBseh7aef5nb+O7jgwPbkvWsd95ol/bFuNb6B 77LSYyRg==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1pG3hv-005P8k-EI; Thu, 12 Jan 2023 19:57:51 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 2E622303478; Thu, 12 Jan 2023 20:57:14 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 68B912CD066DC; Thu, 12 Jan 2023 20:57:08 +0100 (CET) Message-ID: <20230112195542.151174682@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:44:00 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com, "Rafael J. Wysocki" , Ulf Hansson Subject: [PATCH v3 46/51] arm64,riscv,perf: Remove RCU_NONIDLE() usage References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org The PM notifiers should no longer be ran with RCU disabled (per the previous patches), as such this hack is no longer required either. Signed-off-by: Peter Zijlstra (Intel) Acked-by: Rafael J. Wysocki Acked-by: Frederic Weisbecker Tested-by: Tony Lindgren Tested-by: Ulf Hansson --- drivers/perf/arm_pmu.c | 11 +---------- drivers/perf/riscv_pmu_sbi.c | 8 +------- 2 files changed, 2 insertions(+), 17 deletions(-) --- a/drivers/perf/arm_pmu.c +++ b/drivers/perf/arm_pmu.c @@ -762,17 +762,8 @@ static void cpu_pm_pmu_setup(struct arm_ case CPU_PM_ENTER_FAILED: /* * Restore and enable the counter. - * armpmu_start() indirectly calls - * - * perf_event_update_userpage() - * - * that requires RCU read locking to be functional, - * wrap the call within RCU_NONIDLE to make the - * RCU subsystem aware this cpu is not idle from - * an RCU perspective for the armpmu_start() call - * duration. */ - RCU_NONIDLE(armpmu_start(event, PERF_EF_RELOAD)); + armpmu_start(event, PERF_EF_RELOAD); break; default: break; --- a/drivers/perf/riscv_pmu_sbi.c +++ b/drivers/perf/riscv_pmu_sbi.c @@ -747,14 +747,8 @@ static int riscv_pm_pmu_notify(struct no case CPU_PM_ENTER_FAILED: /* * Restore and enable the counter. - * - * Requires RCU read locking to be functional, - * wrap the call within RCU_NONIDLE to make the - * RCU subsystem aware this cpu is not idle from - * an RCU perspective for the riscv_pmu_start() call - * duration. */ - RCU_NONIDLE(riscv_pmu_start(event, PERF_EF_RELOAD)); + riscv_pmu_start(event, PERF_EF_RELOAD); break; default: break; From patchwork Thu Jan 12 19:44:01 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 641847 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B5212C678D6 for ; Thu, 12 Jan 2023 20:04:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241391AbjALUDw (ORCPT ); Thu, 12 Jan 2023 15:03:52 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44288 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229643AbjALT7R (ORCPT ); Thu, 12 Jan 2023 14:59:17 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C6CFE21B1; Thu, 12 Jan 2023 11:58:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=grsvYP38q4MnN8oBsFSgy8h24Veck5RfPmpq2ugRYPM=; b=sAS+cVfJZnxSjVZ+cWnQizLCZi uzGVUsOf3anafnENfDcz5DBxNwmF2u/05pvc6A0c+OdcaX2m7Qx3mQCWD2r8+RXAQmr6AABwQQUqG Xnn1+diWHWxMGA10WHWQkPrlviiLNwKR8l/igNBPuc/Urss/XPLwrgEzGEkTLbJF2i3zM2wEUdQId iXvs8/Thb5QmoGtDr5BpPsofdym80GCpPly/+P1kmFfpKKXI1eKi4k9Kt5ZS1McOXBTe8WNh0qvx1 Mira4VG3zNGY/eh9MdDKDjG1vDtIkJ7jl+e56WDxEl8scNd8fDZtJTeB77Tp7XyQzYbmD4z6YExxk sfEhC80A==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1pG3hs-005P5E-9Z; Thu, 12 Jan 2023 19:57:48 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 360EB30347C; Thu, 12 Jan 2023 20:57:14 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 6E8FA2CD066EC; Thu, 12 Jan 2023 20:57:08 +0100 (CET) Message-ID: <20230112195542.212914195@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:44:01 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com Subject: [PATCH v3 47/51] cpuidle: Ensure ct_cpuidle_enter() is always called from noinstr/__cpuidle References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Tracing (kprobes included) and other compiler instrumentation relies on a normal kernel runtime. Therefore all functions that disable RCU should be noinstr, as should all functions that are called while RCU is disabled. Signed-off-by: Peter Zijlstra (Intel) --- drivers/cpuidle/cpuidle.c | 37 ++++++++++++++++++++++++++++--------- 1 file changed, 28 insertions(+), 9 deletions(-) --- a/drivers/cpuidle/cpuidle.c +++ b/drivers/cpuidle/cpuidle.c @@ -137,11 +137,13 @@ int cpuidle_find_deepest_state(struct cp } #ifdef CONFIG_SUSPEND -static void enter_s2idle_proper(struct cpuidle_driver *drv, - struct cpuidle_device *dev, int index) +static noinstr void enter_s2idle_proper(struct cpuidle_driver *drv, + struct cpuidle_device *dev, int index) { - ktime_t time_start, time_end; struct cpuidle_state *target_state = &drv->states[index]; + ktime_t time_start, time_end; + + instrumentation_begin(); time_start = ns_to_ktime(local_clock()); @@ -152,13 +154,18 @@ static void enter_s2idle_proper(struct c * suspended is generally unsafe. */ stop_critical_timings(); - if (!(target_state->flags & CPUIDLE_FLAG_RCU_IDLE)) + if (!(target_state->flags & CPUIDLE_FLAG_RCU_IDLE)) { ct_cpuidle_enter(); + /* Annotate away the indirect call */ + instrumentation_begin(); + } target_state->enter_s2idle(dev, drv, index); if (WARN_ON_ONCE(!irqs_disabled())) raw_local_irq_disable(); - if (!(target_state->flags & CPUIDLE_FLAG_RCU_IDLE)) + if (!(target_state->flags & CPUIDLE_FLAG_RCU_IDLE)) { + instrumentation_end(); ct_cpuidle_exit(); + } tick_unfreeze(); start_critical_timings(); @@ -166,6 +173,7 @@ static void enter_s2idle_proper(struct c dev->states_usage[index].s2idle_time += ktime_us_delta(time_end, time_start); dev->states_usage[index].s2idle_usage++; + instrumentation_end(); } /** @@ -200,8 +208,9 @@ int cpuidle_enter_s2idle(struct cpuidle_ * @drv: cpuidle driver for this cpu * @index: index into the states table in @drv of the state to enter */ -int cpuidle_enter_state(struct cpuidle_device *dev, struct cpuidle_driver *drv, - int index) +noinstr int cpuidle_enter_state(struct cpuidle_device *dev, + struct cpuidle_driver *drv, + int index) { int entered_state; @@ -209,6 +218,8 @@ int cpuidle_enter_state(struct cpuidle_d bool broadcast = !!(target_state->flags & CPUIDLE_FLAG_TIMER_STOP); ktime_t time_start, time_end; + instrumentation_begin(); + /* * Tell the time framework to switch to a broadcast timer because our * local timer will be shut down. If a local timer is used from another @@ -235,15 +246,21 @@ int cpuidle_enter_state(struct cpuidle_d time_start = ns_to_ktime(local_clock()); stop_critical_timings(); - if (!(target_state->flags & CPUIDLE_FLAG_RCU_IDLE)) + if (!(target_state->flags & CPUIDLE_FLAG_RCU_IDLE)) { ct_cpuidle_enter(); + /* Annotate away the indirect call */ + instrumentation_begin(); + } entered_state = target_state->enter(dev, drv, index); + if (WARN_ONCE(!irqs_disabled(), "%ps leaked IRQ state", target_state->enter)) raw_local_irq_disable(); - if (!(target_state->flags & CPUIDLE_FLAG_RCU_IDLE)) + if (!(target_state->flags & CPUIDLE_FLAG_RCU_IDLE)) { + instrumentation_end(); ct_cpuidle_exit(); + } start_critical_timings(); sched_clock_idle_wakeup_event(); @@ -306,6 +323,8 @@ int cpuidle_enter_state(struct cpuidle_d dev->states_usage[index].rejected++; } + instrumentation_end(); + return entered_state; } From patchwork Thu Jan 12 19:44:02 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 641850 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 036C6C678DF for ; Thu, 12 Jan 2023 20:04:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241324AbjALUDh (ORCPT ); Thu, 12 Jan 2023 15:03:37 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44146 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233122AbjALT7Q (ORCPT ); Thu, 12 Jan 2023 14:59:16 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C9E881089; Thu, 12 Jan 2023 11:58:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=9z+4CWfQMO+ElFQ60iDcVJO2pPanU43MIsqpSKsLu08=; b=Qqod01hbcDRSoMsHp2FGB2yRt/ 657wthIO1WvpTIc8UJxry1BepGtlDwE7epFhhEiyVvYd20FumrIlq3K+vaV0ZtQy7OHhU1Ha6Vy+d u0SWb3lIPqXVymeSnZvxVUtagcGxMJy0Xe74jYFZx3+0fLic59abuep7mI8xDIZhMBlZ3t6vzavRb Uv1EVPbqUKMaMYAg9feMtnwldJEBNOwkWJYHJ9H531eMj1aqNuc6W4X31PojT7WMjEw5m15cdtiiL lKCURu3mZO9ph5F7yR6vShuu1trhYOgXzpxqstDK3EURxd4NXPx8gIyyUp3NSoc32+cD1hUu18TSA o+sF+wjQ==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1pG3ht-005P60-6o; Thu, 12 Jan 2023 19:57:49 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 3B1D030347F; Thu, 12 Jan 2023 20:57:14 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 725472CD066E4; Thu, 12 Jan 2023 20:57:08 +0100 (CET) Message-ID: <20230112195542.274096325@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:44:02 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com Subject: [PATCH v3 48/51] cpuidle,arch: Mark all ct_cpuidle_enter() callers __cpuidle References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org For all cpuidle drivers that use CPUIDLE_FLAG_RCU_IDLE, ensure that all functions that call ct_cpuidle_enter() are marked __cpuidle. ( due to lack of noinstr validation on these platforms it is entirely possible this isn't complete ) Signed-off-by: Peter Zijlstra (Intel) --- arch/arm/mach-imx/cpuidle-imx6q.c | 4 ++-- arch/arm/mach-imx/cpuidle-imx6sx.c | 4 ++-- arch/arm/mach-omap2/omap-mpuss-lowpower.c | 4 ++-- arch/arm/mach-omap2/pm34xx.c | 2 +- arch/arm64/kernel/cpuidle.c | 2 +- drivers/cpuidle/cpuidle-arm.c | 4 ++-- drivers/cpuidle/cpuidle-big_little.c | 4 ++-- drivers/cpuidle/cpuidle-mvebu-v7.c | 6 +++--- drivers/cpuidle/cpuidle-psci.c | 17 ++++++----------- drivers/cpuidle/cpuidle-qcom-spm.c | 4 ++-- drivers/cpuidle/cpuidle-riscv-sbi.c | 10 +++++----- drivers/cpuidle/cpuidle-tegra.c | 10 +++++----- 12 files changed, 33 insertions(+), 38 deletions(-) --- a/arch/arm/mach-imx/cpuidle-imx6q.c +++ b/arch/arm/mach-imx/cpuidle-imx6q.c @@ -17,8 +17,8 @@ static int num_idle_cpus = 0; static DEFINE_RAW_SPINLOCK(cpuidle_lock); -static int imx6q_enter_wait(struct cpuidle_device *dev, - struct cpuidle_driver *drv, int index) +static __cpuidle int imx6q_enter_wait(struct cpuidle_device *dev, + struct cpuidle_driver *drv, int index) { raw_spin_lock(&cpuidle_lock); if (++num_idle_cpus == num_online_cpus()) --- a/arch/arm/mach-imx/cpuidle-imx6sx.c +++ b/arch/arm/mach-imx/cpuidle-imx6sx.c @@ -30,8 +30,8 @@ static int imx6sx_idle_finish(unsigned l return 0; } -static int imx6sx_enter_wait(struct cpuidle_device *dev, - struct cpuidle_driver *drv, int index) +static __cpuidle int imx6sx_enter_wait(struct cpuidle_device *dev, + struct cpuidle_driver *drv, int index) { imx6_set_lpm(WAIT_UNCLOCKED); --- a/arch/arm/mach-omap2/omap-mpuss-lowpower.c +++ b/arch/arm/mach-omap2/omap-mpuss-lowpower.c @@ -224,8 +224,8 @@ static void __init save_l2x0_context(voi * 2 - CPUx L1 and logic lost + GIC lost: MPUSS OSWR * 3 - CPUx L1 and logic lost + GIC + L2 lost: DEVICE OFF */ -int omap4_enter_lowpower(unsigned int cpu, unsigned int power_state, - bool rcuidle) +__cpuidle int omap4_enter_lowpower(unsigned int cpu, unsigned int power_state, + bool rcuidle) { struct omap4_cpu_pm_info *pm_info = &per_cpu(omap4_pm_info, cpu); unsigned int save_state = 0, cpu_logic_state = PWRDM_POWER_RET; --- a/arch/arm/mach-omap2/pm34xx.c +++ b/arch/arm/mach-omap2/pm34xx.c @@ -175,7 +175,7 @@ static int omap34xx_do_sram_idle(unsigne return 0; } -void omap_sram_idle(bool rcuidle) +__cpuidle void omap_sram_idle(bool rcuidle) { /* Variable to tell what needs to be saved and restored * in omap_sram_idle*/ --- a/arch/arm64/kernel/cpuidle.c +++ b/arch/arm64/kernel/cpuidle.c @@ -62,7 +62,7 @@ int acpi_processor_ffh_lpi_probe(unsigne return psci_acpi_cpu_init_idle(cpu); } -int acpi_processor_ffh_lpi_enter(struct acpi_lpi_state *lpi) +__cpuidle int acpi_processor_ffh_lpi_enter(struct acpi_lpi_state *lpi) { u32 state = lpi->address; --- a/drivers/cpuidle/cpuidle-arm.c +++ b/drivers/cpuidle/cpuidle-arm.c @@ -31,8 +31,8 @@ * Called from the CPUidle framework to program the device to the * specified target state selected by the governor. */ -static int arm_enter_idle_state(struct cpuidle_device *dev, - struct cpuidle_driver *drv, int idx) +static __cpuidle int arm_enter_idle_state(struct cpuidle_device *dev, + struct cpuidle_driver *drv, int idx) { /* * Pass idle state index to arm_cpuidle_suspend which in turn --- a/drivers/cpuidle/cpuidle-big_little.c +++ b/drivers/cpuidle/cpuidle-big_little.c @@ -122,8 +122,8 @@ static int notrace bl_powerdown_finisher * Called from the CPUidle framework to program the device to the * specified target state selected by the governor. */ -static int bl_enter_powerdown(struct cpuidle_device *dev, - struct cpuidle_driver *drv, int idx) +static __cpuidle int bl_enter_powerdown(struct cpuidle_device *dev, + struct cpuidle_driver *drv, int idx) { cpu_pm_enter(); ct_cpuidle_enter(); --- a/drivers/cpuidle/cpuidle-mvebu-v7.c +++ b/drivers/cpuidle/cpuidle-mvebu-v7.c @@ -25,9 +25,9 @@ static int (*mvebu_v7_cpu_suspend)(int); -static int mvebu_v7_enter_idle(struct cpuidle_device *dev, - struct cpuidle_driver *drv, - int index) +static __cpuidle int mvebu_v7_enter_idle(struct cpuidle_device *dev, + struct cpuidle_driver *drv, + int index) { int ret; bool deepidle = false; --- a/drivers/cpuidle/cpuidle-psci.c +++ b/drivers/cpuidle/cpuidle-psci.c @@ -49,14 +49,9 @@ static inline u32 psci_get_domain_state( return __this_cpu_read(domain_state); } -static inline int psci_enter_state(int idx, u32 state) -{ - return CPU_PM_CPU_IDLE_ENTER_PARAM(psci_cpu_suspend_enter, idx, state); -} - -static int __psci_enter_domain_idle_state(struct cpuidle_device *dev, - struct cpuidle_driver *drv, int idx, - bool s2idle) +static __cpuidle int __psci_enter_domain_idle_state(struct cpuidle_device *dev, + struct cpuidle_driver *drv, int idx, + bool s2idle) { struct psci_cpuidle_data *data = this_cpu_ptr(&psci_cpuidle_data); u32 *states = data->psci_states; @@ -192,12 +187,12 @@ static void psci_idle_init_cpuhp(void) pr_warn("Failed %d while setup cpuhp state\n", err); } -static int psci_enter_idle_state(struct cpuidle_device *dev, - struct cpuidle_driver *drv, int idx) +static __cpuidle int psci_enter_idle_state(struct cpuidle_device *dev, + struct cpuidle_driver *drv, int idx) { u32 *state = __this_cpu_read(psci_cpuidle_data.psci_states); - return psci_enter_state(idx, state[idx]); + return CPU_PM_CPU_IDLE_ENTER_PARAM(psci_cpu_suspend_enter, idx, state[idx]); } static const struct of_device_id psci_idle_state_match[] = { --- a/drivers/cpuidle/cpuidle-qcom-spm.c +++ b/drivers/cpuidle/cpuidle-qcom-spm.c @@ -58,8 +58,8 @@ static int qcom_cpu_spc(struct spm_drive return ret; } -static int spm_enter_idle_state(struct cpuidle_device *dev, - struct cpuidle_driver *drv, int idx) +static __cpuidle int spm_enter_idle_state(struct cpuidle_device *dev, + struct cpuidle_driver *drv, int idx) { struct cpuidle_qcom_spm_data *data = container_of(drv, struct cpuidle_qcom_spm_data, cpuidle_driver); --- a/drivers/cpuidle/cpuidle-riscv-sbi.c +++ b/drivers/cpuidle/cpuidle-riscv-sbi.c @@ -93,8 +93,8 @@ static int sbi_suspend(u32 state) return sbi_suspend_finisher(state, 0, 0); } -static int sbi_cpuidle_enter_state(struct cpuidle_device *dev, - struct cpuidle_driver *drv, int idx) +static __cpuidle int sbi_cpuidle_enter_state(struct cpuidle_device *dev, + struct cpuidle_driver *drv, int idx) { u32 *states = __this_cpu_read(sbi_cpuidle_data.states); u32 state = states[idx]; @@ -106,9 +106,9 @@ static int sbi_cpuidle_enter_state(struc idx, state); } -static int __sbi_enter_domain_idle_state(struct cpuidle_device *dev, - struct cpuidle_driver *drv, int idx, - bool s2idle) +static __cpuidle int __sbi_enter_domain_idle_state(struct cpuidle_device *dev, + struct cpuidle_driver *drv, int idx, + bool s2idle) { struct sbi_cpuidle_data *data = this_cpu_ptr(&sbi_cpuidle_data); u32 *states = data->states; --- a/drivers/cpuidle/cpuidle-tegra.c +++ b/drivers/cpuidle/cpuidle-tegra.c @@ -160,8 +160,8 @@ static int tegra_cpuidle_coupled_barrier return 0; } -static int tegra_cpuidle_state_enter(struct cpuidle_device *dev, - int index, unsigned int cpu) +static __cpuidle int tegra_cpuidle_state_enter(struct cpuidle_device *dev, + int index, unsigned int cpu) { int err; @@ -226,9 +226,9 @@ static int tegra_cpuidle_adjust_state_in return index; } -static int tegra_cpuidle_enter(struct cpuidle_device *dev, - struct cpuidle_driver *drv, - int index) +static __cpuidle int tegra_cpuidle_enter(struct cpuidle_device *dev, + struct cpuidle_driver *drv, + int index) { bool do_rcu = drv->states[index].flags & CPUIDLE_FLAG_RCU_IDLE; unsigned int cpu = cpu_logical_map(dev->cpu); From patchwork Thu Jan 12 19:44:03 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 642471 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 65D0EC678D6 for ; Thu, 12 Jan 2023 20:03:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241161AbjALUDR (ORCPT ); Thu, 12 Jan 2023 15:03:17 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44322 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237748AbjALT7U (ORCPT ); Thu, 12 Jan 2023 14:59:20 -0500 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BE3562DFC; Thu, 12 Jan 2023 11:58:12 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=53PdPXBrlefs7aSWYtbVMctVqERBXlbNfkzlUyuHUdw=; b=jkdiNqhELXj5CzanYQ20dadQjZ HUn5I+MvJqhepcqPHBVlfZesL5T1BHMXftP8ez1WYbjSyJV9X85Xb/2lLnU5HxsFfWvxHxNYbXMfX 3suxQVQl2DSZElbXf1ip4LF4xOt+r5FVdsOrU3NDCbKShRYDyeaZc7QCd7p1tq+ps2GFOVNaFql03 XFgO8Wb85sm7g0HrswIQjAmmaFk3vSBO2AhJbG2M12u1oJd1EaXpYEUTt1wRVE3efBOG2D/R3hBTu QKj6jS2S+NydJjiMbBfUehGc5Crf030MLT/J6aU9TDTrUQkZ/HDSe0D1/zMmPRDB2DJuN8A9NgSlp gEfokIOA==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1pG3hY-0045w9-2y; Thu, 12 Jan 2023 19:57:33 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 42C0F303482; Thu, 12 Jan 2023 20:57:14 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 767D32CD066F4; Thu, 12 Jan 2023 20:57:08 +0100 (CET) Message-ID: <20230112195542.335211484@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:44:03 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com Subject: [PATCH v3 49/51] cpuidle, arch: Mark all regular cpuidle_state::enter methods __cpuidle References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org For all cpuidle drivers that do not use CPUIDLE_FLAG_RCU_IDLE (iow, the simple ones) make sure all the functions are marked __cpuidle. ( due to lack of noinstr validation on these platforms it is entirely possible this isn't complete ) Signed-off-by: Peter Zijlstra (Intel) --- arch/arm/kernel/cpuidle.c | 4 ++-- arch/arm/mach-davinci/cpuidle.c | 4 ++-- arch/arm/mach-imx/cpuidle-imx5.c | 4 ++-- arch/arm/mach-imx/cpuidle-imx6sl.c | 4 ++-- arch/arm/mach-imx/cpuidle-imx7ulp.c | 4 ++-- arch/arm/mach-s3c/cpuidle-s3c64xx.c | 5 ++--- arch/mips/kernel/idle.c | 6 +++--- 7 files changed, 15 insertions(+), 16 deletions(-) --- a/arch/arm/kernel/cpuidle.c +++ b/arch/arm/kernel/cpuidle.c @@ -26,8 +26,8 @@ static struct cpuidle_ops cpuidle_ops[NR * * Returns the index passed as parameter */ -int arm_cpuidle_simple_enter(struct cpuidle_device *dev, - struct cpuidle_driver *drv, int index) +__cpuidle int arm_cpuidle_simple_enter(struct cpuidle_device *dev, struct + cpuidle_driver *drv, int index) { cpu_do_idle(); --- a/arch/arm/mach-davinci/cpuidle.c +++ b/arch/arm/mach-davinci/cpuidle.c @@ -44,8 +44,8 @@ static void davinci_save_ddr_power(int e } /* Actual code that puts the SoC in different idle states */ -static int davinci_enter_idle(struct cpuidle_device *dev, - struct cpuidle_driver *drv, int index) +static __cpuidle int davinci_enter_idle(struct cpuidle_device *dev, + struct cpuidle_driver *drv, int index) { davinci_save_ddr_power(1, ddr2_pdown); cpu_do_idle(); --- a/arch/arm/mach-imx/cpuidle-imx5.c +++ b/arch/arm/mach-imx/cpuidle-imx5.c @@ -8,8 +8,8 @@ #include #include "cpuidle.h" -static int imx5_cpuidle_enter(struct cpuidle_device *dev, - struct cpuidle_driver *drv, int index) +static __cpuidle int imx5_cpuidle_enter(struct cpuidle_device *dev, + struct cpuidle_driver *drv, int index) { arm_pm_idle(); return index; --- a/arch/arm/mach-imx/cpuidle-imx6sl.c +++ b/arch/arm/mach-imx/cpuidle-imx6sl.c @@ -11,8 +11,8 @@ #include "common.h" #include "cpuidle.h" -static int imx6sl_enter_wait(struct cpuidle_device *dev, - struct cpuidle_driver *drv, int index) +static __cpuidle int imx6sl_enter_wait(struct cpuidle_device *dev, + struct cpuidle_driver *drv, int index) { imx6_set_lpm(WAIT_UNCLOCKED); /* --- a/arch/arm/mach-imx/cpuidle-imx7ulp.c +++ b/arch/arm/mach-imx/cpuidle-imx7ulp.c @@ -12,8 +12,8 @@ #include "common.h" #include "cpuidle.h" -static int imx7ulp_enter_wait(struct cpuidle_device *dev, - struct cpuidle_driver *drv, int index) +static __cpuidle int imx7ulp_enter_wait(struct cpuidle_device *dev, + struct cpuidle_driver *drv, int index) { if (index == 1) imx7ulp_set_lpm(ULP_PM_WAIT); --- a/arch/arm/mach-s3c/cpuidle-s3c64xx.c +++ b/arch/arm/mach-s3c/cpuidle-s3c64xx.c @@ -19,9 +19,8 @@ #include "regs-sys-s3c64xx.h" #include "regs-syscon-power-s3c64xx.h" -static int s3c64xx_enter_idle(struct cpuidle_device *dev, - struct cpuidle_driver *drv, - int index) +static __cpuidle int s3c64xx_enter_idle(struct cpuidle_device *dev, + struct cpuidle_driver *drv, int index) { unsigned long tmp; --- a/arch/mips/kernel/idle.c +++ b/arch/mips/kernel/idle.c @@ -241,7 +241,7 @@ void __init check_wait(void) } } -void arch_cpu_idle(void) +__cpuidle void arch_cpu_idle(void) { if (cpu_wait) cpu_wait(); @@ -249,8 +249,8 @@ void arch_cpu_idle(void) #ifdef CONFIG_CPU_IDLE -int mips_cpuidle_wait_enter(struct cpuidle_device *dev, - struct cpuidle_driver *drv, int index) +__cpuidle int mips_cpuidle_wait_enter(struct cpuidle_device *dev, + struct cpuidle_driver *drv, int index) { arch_cpu_idle(); return index; From patchwork Thu Jan 12 19:44:04 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 642451 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CFFA4C678D6 for ; Thu, 12 Jan 2023 20:12:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241934AbjALUM0 (ORCPT ); Thu, 12 Jan 2023 15:12:26 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44156 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232397AbjALT7N (ORCPT ); Thu, 12 Jan 2023 14:59:13 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9970BCDF; Thu, 12 Jan 2023 11:58:05 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=Un035BTYhsjREpZ4dpy/MHkkoifcKtLiH3nYidAuKL8=; b=P5c8UU2jghR82uJHaUsCbEyZY2 1BjYkq3jeF5ewbeuBixxGQ1MFHR9TCeHAHBjDMgt+hkRsw0FFt2ppNujpZmDy3BclS1Ums/sHfSGF DsoLRzOAcjZb0YeI2dan/xzDO4bLczNXAS9bGqKX112iGbxaDbC1pmZnnUukuGv1RP3YOO+mA12eY yRYq2ks+V6tltY12SJ/UDL++Q4qZeEYg7ljBwFyVCutcyQJ/H9pzwWVke2dKUZwwKrXgIGXwZmcPJ pPt48ptlxwCsahE0v4HXTBqWzoIi9klWddYcc0T3lFrQ7of2NxwaFmInlnyrFVz5DKbqBazXyVs9+ ZpRfznRA==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1pG3hu-005P7i-Rf; Thu, 12 Jan 2023 19:57:50 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 4EAB5303484; Thu, 12 Jan 2023 20:57:14 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 7C19A2CD066F8; Thu, 12 Jan 2023 20:57:08 +0100 (CET) Message-ID: <20230112195542.397238052@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:44:04 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com Subject: [PATCH v3 50/51] cpuidle: Comments about noinstr/__cpuidle References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Add a few words on noinstr / __cpuidle usage. Signed-off-by: Peter Zijlstra (Intel) --- drivers/cpuidle/cpuidle.c | 12 ++++++++++++ include/linux/compiler_types.h | 10 ++++++++++ 2 files changed, 22 insertions(+) --- a/drivers/cpuidle/cpuidle.c +++ b/drivers/cpuidle/cpuidle.c @@ -252,6 +252,18 @@ noinstr int cpuidle_enter_state(struct c instrumentation_begin(); } + /* + * NOTE!! + * + * For cpuidle_state::enter() methods that do *NOT* set + * CPUIDLE_FLAG_RCU_IDLE RCU will be disabled here and these functions + * must be marked either noinstr or __cpuidle. + * + * For cpuidle_state::enter() methods that *DO* set + * CPUIDLE_FLAG_RCU_IDLE this isn't required, but they must mark the + * function calling ct_cpuidle_enter() as noinstr/__cpuidle and all + * functions called within the RCU-idle region. + */ entered_state = target_state->enter(dev, drv, index); if (WARN_ONCE(!irqs_disabled(), "%ps leaked IRQ state", target_state->enter)) --- a/include/linux/compiler_types.h +++ b/include/linux/compiler_types.h @@ -233,6 +233,16 @@ struct ftrace_likely_data { #define noinstr __noinstr_section(".noinstr.text") +/* + * The __cpuidle section is used twofold: + * + * 1) the original use -- identifying if a CPU is 'stuck' in idle state based + * on it's instruction pointer. See cpu_in_idle(). + * + * 2) supressing instrumentation around where cpuidle disables RCU; where the + * function isn't strictly required for #1, this is interchangeable with + * noinstr. + */ #define __cpuidle __noinstr_section(".cpuidle.text") #endif /* __KERNEL__ */ From patchwork Thu Jan 12 19:44:05 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Peter Zijlstra X-Patchwork-Id: 641837 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 29664C678D6 for ; Thu, 12 Jan 2023 20:12:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241790AbjALUMT (ORCPT ); Thu, 12 Jan 2023 15:12:19 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44250 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232870AbjALT7O (ORCPT ); Thu, 12 Jan 2023 14:59:14 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D14201096; Thu, 12 Jan 2023 11:58:06 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-ID:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=g+drg6uUsP6YHX5z1pA/AishyJbSIL0Ic60jCQj0FKI=; b=XXUxTtqveFREVYw6+8AB4LdIHp 9tBm0Q52XhYpYgwoQcxYxigKngYLFaZ8/xRzmgS4y7qry48gTKg92kcIokiFxq+nXoKsi5V3iEcmw NeSgEYUEAODvsFoe2txTC5A5gjX0FAnKp0Q7yNwBfU6uT1Hqnm5jLS+saV0kDtwrCF///MGUsgvx3 1g//CQX4WQUM0ZQk+SvRZnfyPsXRlrLLGN0jK1Pr/WSOQeRzqpxuvUJOC9vpE8dJ7PLwl8i1xnS/H mXWibGn68OUz5LWtcUOt2vHPDy+rJq08dxPxP49gKc05n2AW5cl/Kj6GS1nr66GMTGwMFZlC6eScr aO0GBkaA==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1pG3hv-005P8h-Bo; Thu, 12 Jan 2023 19:57:51 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 5842F300C22; Thu, 12 Jan 2023 20:57:14 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 810012CD066F0; Thu, 12 Jan 2023 20:57:08 +0100 (CET) Message-ID: <20230112195542.458034262@infradead.org> User-Agent: quilt/0.66 Date: Thu, 12 Jan 2023 20:44:05 +0100 From: Peter Zijlstra To: peterz@infradead.org Cc: richard.henderson@linaro.org, ink@jurassic.park.msu.ru, mattst88@gmail.com, vgupta@kernel.org, linux@armlinux.org.uk, nsekhar@ti.com, brgl@bgdev.pl, ulli.kroll@googlemail.com, linus.walleij@linaro.org, shawnguo@kernel.org, Sascha Hauer , kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, tony@atomide.com, khilman@kernel.org, krzysztof.kozlowski@linaro.org, alim.akhtar@samsung.com, catalin.marinas@arm.com, will@kernel.org, guoren@kernel.org, bcain@quicinc.com, chenhuacai@kernel.org, kernel@xen0n.name, geert@linux-m68k.org, sammy@sammy.net, monstr@monstr.eu, tsbogend@alpha.franken.de, dinguyen@kernel.org, jonas@southpole.se, stefan.kristiansson@saunalahti.fi, shorne@gmail.com, James.Bottomley@HansenPartnership.com, deller@gmx.de, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, ysato@users.sourceforge.jp, dalias@libc.org, davem@davemloft.net, richard@nod.at, anton.ivanov@cambridgegreys.com, johannes@sipsolutions.net, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, namhyung@kernel.org, jgross@suse.com, srivatsa@csail.mit.edu, amakhalov@vmware.com, pv-drivers@vmware.com, boris.ostrovsky@oracle.com, chris@zankel.net, jcmvbkbc@gmail.com, rafael@kernel.org, lenb@kernel.org, pavel@ucw.cz, gregkh@linuxfoundation.org, mturquette@baylibre.com, sboyd@kernel.org, daniel.lezcano@linaro.org, lpieralisi@kernel.org, sudeep.holla@arm.com, agross@kernel.org, andersson@kernel.org, konrad.dybcio@linaro.org, anup@brainfault.org, thierry.reding@gmail.com, jonathanh@nvidia.com, jacob.jun.pan@linux.intel.com, atishp@atishpatra.org, Arnd Bergmann , yury.norov@gmail.com, andriy.shevchenko@linux.intel.com, linux@rasmusvillemoes.dk, dennis@kernel.org, tj@kernel.org, cl@linux.com, rostedt@goodmis.org, mhiramat@kernel.org, frederic@kernel.org, paulmck@kernel.org, pmladek@suse.com, senozhatsky@chromium.org, john.ogness@linutronix.de, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, Andrew Morton , jpoimboe@kernel.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-omap@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-perf-users@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-xtensa@linux-xtensa.org, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-trace-kernel@vger.kernel.org, kasan-dev@googlegroups.com Subject: [PATCH v3 51/51] context_tracking: Fix noinstr vs KASAN References: <20230112194314.845371875@infradead.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org vmlinux.o: warning: objtool: __ct_user_enter+0x72: call to __kasan_check_write() leaves .noinstr.text section vmlinux.o: warning: objtool: __ct_user_exit+0x47: call to __kasan_check_write() leaves .noinstr.text section Signed-off-by: Peter Zijlstra (Intel) --- kernel/context_tracking.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) --- a/kernel/context_tracking.c +++ b/kernel/context_tracking.c @@ -510,7 +510,7 @@ void noinstr __ct_user_enter(enum ctx_st * In this we case we don't care about any concurrency/ordering. */ if (!IS_ENABLED(CONFIG_CONTEXT_TRACKING_IDLE)) - atomic_set(&ct->state, state); + arch_atomic_set(&ct->state, state); } else { /* * Even if context tracking is disabled on this CPU, because it's outside @@ -527,7 +527,7 @@ void noinstr __ct_user_enter(enum ctx_st */ if (!IS_ENABLED(CONFIG_CONTEXT_TRACKING_IDLE)) { /* Tracking for vtime only, no concurrent RCU EQS accounting */ - atomic_set(&ct->state, state); + arch_atomic_set(&ct->state, state); } else { /* * Tracking for vtime and RCU EQS. Make sure we don't race @@ -535,7 +535,7 @@ void noinstr __ct_user_enter(enum ctx_st * RCU only requires RCU_DYNTICKS_IDX increments to be fully * ordered. */ - atomic_add(state, &ct->state); + arch_atomic_add(state, &ct->state); } } } @@ -630,12 +630,12 @@ void noinstr __ct_user_exit(enum ctx_sta * In this we case we don't care about any concurrency/ordering. */ if (!IS_ENABLED(CONFIG_CONTEXT_TRACKING_IDLE)) - atomic_set(&ct->state, CONTEXT_KERNEL); + arch_atomic_set(&ct->state, CONTEXT_KERNEL); } else { if (!IS_ENABLED(CONFIG_CONTEXT_TRACKING_IDLE)) { /* Tracking for vtime only, no concurrent RCU EQS accounting */ - atomic_set(&ct->state, CONTEXT_KERNEL); + arch_atomic_set(&ct->state, CONTEXT_KERNEL); } else { /* * Tracking for vtime and RCU EQS. Make sure we don't race @@ -643,7 +643,7 @@ void noinstr __ct_user_exit(enum ctx_sta * RCU only requires RCU_DYNTICKS_IDX increments to be fully * ordered. */ - atomic_sub(state, &ct->state); + arch_atomic_sub(state, &ct->state); } } }