From patchwork Sun Jan 4 10:55:06 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hanjun Guo X-Patchwork-Id: 42714 Return-Path: X-Original-To: linaro@patches.linaro.org Delivered-To: linaro@patches.linaro.org Received: from mail-ee0-f72.google.com (mail-ee0-f72.google.com [74.125.83.72]) by ip-10-151-82-157.ec2.internal (Postfix) with ESMTPS id D28E920A5F for ; Sun, 4 Jan 2015 10:56:25 +0000 (UTC) Received: by mail-ee0-f72.google.com with SMTP id e53sf11412596eek.3 for ; Sun, 04 Jan 2015 02:56:25 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:delivered-to:from:to:cc:subject :date:message-id:in-reply-to:references:sender:precedence:list-id :x-original-sender:x-original-authentication-results:mailing-list :list-post:list-help:list-archive:list-unsubscribe; bh=z37eTH/h9p45V5xuheWdl9wOH7p+kNMGveJoAoHmrxw=; b=mRrCHtCKsoSdi2p2HgKTFq07GDcxKZYhsgwunzkJzbZhEuG9s2vLdVRCsoka64qYXX z4H2njN6Vd58sue6X/m1idKF9UDpVp1V05DUiI98xq8WjiTWvNAIfhxD5NKhSQDpNxhR WibsT5Uvhtc6ChcZ9gdobvNmGV38Dsj7OojgqJblUK3pVozSJVyvDh4khNxQJnya7/iC dVmT7Y8VoIklSBss5vydZVm8kh2DYmbvi8EwyCU2H5Mra8wnnBqQDZ2InlUgrQ5VPZ0g yxkpQmyzb2ezT9aiZOvUfeHwrhNW+/KzZtUXjxOcs6pu1HT4cCYuTzgRnY3OTKmIzkGs P0QQ== X-Gm-Message-State: ALoCoQlLyV+lFdY5NRpBDi/TejS+U77hv9ymln7pGTtYk0sCEuT9CWJW9xdlDFgwHOI8JiwlPSL5 X-Received: by 10.112.54.165 with SMTP id k5mr2333829lbp.5.1420368985130; Sun, 04 Jan 2015 02:56:25 -0800 (PST) MIME-Version: 1.0 X-BeenThere: patchwork-forward@linaro.org Received: by 10.152.28.41 with SMTP id y9ls1473600lag.54.gmail; Sun, 04 Jan 2015 02:56:24 -0800 (PST) X-Received: by 10.112.205.231 with SMTP id lj7mr8764601lbc.86.1420368984958; Sun, 04 Jan 2015 02:56:24 -0800 (PST) Received: from mail-lb0-f177.google.com (mail-lb0-f177.google.com. [209.85.217.177]) by mx.google.com with ESMTPS id ai4si58067697lbc.10.2015.01.04.02.56.24 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Sun, 04 Jan 2015 02:56:24 -0800 (PST) Received-SPF: pass (google.com: domain of patch+caf_=patchwork-forward=linaro.org@linaro.org designates 209.85.217.177 as permitted sender) client-ip=209.85.217.177; Received: by mail-lb0-f177.google.com with SMTP id b6so16507696lbj.36 for ; Sun, 04 Jan 2015 02:56:24 -0800 (PST) X-Received: by 10.152.7.229 with SMTP id m5mr86846987laa.80.1420368984850; Sun, 04 Jan 2015 02:56:24 -0800 (PST) X-Forwarded-To: patchwork-forward@linaro.org X-Forwarded-For: patch@linaro.org patchwork-forward@linaro.org Delivered-To: patch@linaro.org Received: by 10.112.9.200 with SMTP id c8csp619065lbb; Sun, 4 Jan 2015 02:56:23 -0800 (PST) X-Received: by 10.66.141.71 with SMTP id rm7mr83399231pab.20.1420368980403; Sun, 04 Jan 2015 02:56:20 -0800 (PST) Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id hw8si28406987pbc.148.2015.01.04.02.56.19; Sun, 04 Jan 2015 02:56:20 -0800 (PST) Received-SPF: none (google.com: linux-kernel-owner@vger.kernel.org does not designate permitted sender hosts) client-ip=209.132.180.67; Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752871AbbADK4K (ORCPT + 27 others); Sun, 4 Jan 2015 05:56:10 -0500 Received: from mail-pa0-f41.google.com ([209.85.220.41]:64827 "EHLO mail-pa0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752851AbbADK4E (ORCPT ); Sun, 4 Jan 2015 05:56:04 -0500 Received: by mail-pa0-f41.google.com with SMTP id rd3so26854812pab.0 for ; Sun, 04 Jan 2015 02:56:03 -0800 (PST) X-Received: by 10.66.141.138 with SMTP id ro10mr132185780pab.67.1420368963718; Sun, 04 Jan 2015 02:56:03 -0800 (PST) Received: from localhost ([180.150.148.224]) by mx.google.com with ESMTPSA id hc10sm51269511pbd.78.2015.01.04.02.56.02 (version=TLSv1.2 cipher=RC4-SHA bits=128/128); Sun, 04 Jan 2015 02:56:03 -0800 (PST) From: Hanjun Guo To: Catalin Marinas , "Rafael J. Wysocki" , Olof Johansson , Arnd Bergmann , Mark Rutland , Grant Likely , Will Deacon Cc: Lorenzo Pieralisi , Graeme Gregory , Sudeep Holla , Jon Masters , Jason Cooper , Marc Zyngier , Bjorn Helgaas , Mark Brown , Rob Herring , Robert Richter , Randy Dunlap , Charles.Garcia-Tobin@arm.com, phoenix.liyi@huawei.com, Timur Tabi , suravee.suthikulpanit@amd.com, linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linaro-acpi@lists.linaro.org, Al Stone , Hanjun Guo Subject: [PATCH v6 05/17] ARM64 / ACPI: Introduce early_param for "acpi" and pass acpi=force to enable ACPI Date: Sun, 4 Jan 2015 18:55:06 +0800 Message-Id: <1420368918-5086-6-git-send-email-hanjun.guo@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1420368918-5086-1-git-send-email-hanjun.guo@linaro.org> References: <1420368918-5086-1-git-send-email-hanjun.guo@linaro.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: list List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Removed-Original-Auth: Dkim didn't pass. X-Original-Sender: hanjun.guo@linaro.org X-Original-Authentication-Results: mx.google.com; spf=pass (google.com: domain of patch+caf_=patchwork-forward=linaro.org@linaro.org designates 209.85.217.177 as permitted sender) smtp.mail=patch+caf_=patchwork-forward=linaro.org@linaro.org Mailing-list: list patchwork-forward@linaro.org; contact patchwork-forward+owners@linaro.org X-Google-Group-Id: 836684582541 List-Post: , List-Help: , List-Archive: List-Unsubscribe: , From: Al Stone Introduce one early parameters "off" and "force" for "acpi", acpi=off will be the default behavior for ARM64, so introduce acpi=force to enable ACPI on ARM64. Disable ACPI before early parameters parsed, and enable it to pass "acpi=force" if people want use ACPI on ARM64. This ensures DT be the prefer one if ACPI table and DT both are provided at this moment. Tested-by: Suravee Suthikulpanit Signed-off-by: Al Stone Signed-off-by: Graeme Gregory Signed-off-by: Hanjun Guo --- Documentation/kernel-parameters.txt | 3 ++- arch/arm64/include/asm/acpi.h | 9 +++++++++ arch/arm64/kernel/acpi.c | 17 +++++++++++++++++ arch/arm64/kernel/setup.c | 3 +++ 4 files changed, 31 insertions(+), 1 deletion(-) diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 4df73da..4adfd50 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -165,7 +165,7 @@ multipliers 'Kilo', 'Mega', and 'Giga', equalling 2^10, 2^20, and 2^30 bytes respectively. Such letter suffixes can also be entirely omitted. - acpi= [HW,ACPI,X86] + acpi= [HW,ACPI,X86,ARM64] Advanced Configuration and Power Interface Format: { force | off | strict | noirq | rsdt } force -- enable ACPI if default was off @@ -175,6 +175,7 @@ bytes respectively. Such letter suffixes can also be entirely omitted. strictly ACPI specification compliant. rsdt -- prefer RSDT over (default) XSDT copy_dsdt -- copy DSDT to memory + For ARM64, ONLY "acpi=off" or "acpi=force" are available See also Documentation/power/runtime_pm.txt, pci=noacpi diff --git a/arch/arm64/include/asm/acpi.h b/arch/arm64/include/asm/acpi.h index 8b837ab..496c33b 100644 --- a/arch/arm64/include/asm/acpi.h +++ b/arch/arm64/include/asm/acpi.h @@ -26,6 +26,13 @@ static inline void disable_acpi(void) acpi_noirq = 1; } +static inline void enable_acpi(void) +{ + acpi_disabled = 0; + acpi_pci_disabled = 0; + acpi_noirq = 0; +} + /* * It's used from ACPI core in kdump to boot UP system with SMP kernel, * with this check the ACPI core will not override the CPU index @@ -40,6 +47,8 @@ static inline bool acpi_has_cpu_in_madt(void) static inline void arch_fix_phys_package_id(int num, u32 slot) { } +#else +static inline void disable_acpi(void) { } #endif /* CONFIG_ACPI */ #endif /*_ASM_ACPI_H*/ diff --git a/arch/arm64/kernel/acpi.c b/arch/arm64/kernel/acpi.c index 9252f72..39a1655 100644 --- a/arch/arm64/kernel/acpi.c +++ b/arch/arm64/kernel/acpi.c @@ -67,3 +67,20 @@ void __init acpi_boot_table_init(void) if (acpi_table_init()) disable_acpi(); } + +static int __init parse_acpi(char *arg) +{ + if (!arg) + return -EINVAL; + + /* "acpi=off" disables both ACPI table parsing and interpreter */ + if (strcmp(arg, "off") == 0) + disable_acpi(); + else if (strcmp(arg, "force") == 0) /* force ACPI to be enabled */ + enable_acpi(); + else + return -EINVAL; /* Core will print when we return error */ + + return 0; +} +early_param("acpi", parse_acpi); diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c index 224a2e6..22e6895 100644 --- a/arch/arm64/kernel/setup.c +++ b/arch/arm64/kernel/setup.c @@ -62,6 +62,7 @@ #include #include #include +#include unsigned int processor_id; EXPORT_SYMBOL(processor_id); @@ -388,6 +389,8 @@ void __init setup_arch(char **cmdline_p) early_fixmap_init(); early_ioremap_init(); + disable_acpi(); + parse_early_param(); /*