From patchwork Tue Jun 7 12:05:29 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "tarumizu.kohei@fujitsu.com" X-Patchwork-Id: 579487 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 34427C43334 for ; Tue, 7 Jun 2022 12:09:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243587AbiFGMJG (ORCPT ); Tue, 7 Jun 2022 08:09:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56246 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243585AbiFGMI7 (ORCPT ); Tue, 7 Jun 2022 08:08:59 -0400 X-Greylist: delayed 63 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Tue, 07 Jun 2022 05:08:55 PDT Received: from esa7.hc1455-7.c3s2.iphmx.com (esa7.hc1455-7.c3s2.iphmx.com [139.138.61.252]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7589E8D6B7 for ; Tue, 7 Jun 2022 05:08:53 -0700 (PDT) X-IronPort-AV: E=McAfee;i="6400,9594,10370"; a="54332932" X-IronPort-AV: E=Sophos;i="5.91,283,1647270000"; d="scan'208";a="54332932" Received: from unknown (HELO yto-r3.gw.nic.fujitsu.com) ([218.44.52.219]) by esa7.hc1455-7.c3s2.iphmx.com with ESMTP; 07 Jun 2022 21:07:48 +0900 Received: from yto-m2.gw.nic.fujitsu.com (yto-nat-yto-m2.gw.nic.fujitsu.com [192.168.83.65]) by yto-r3.gw.nic.fujitsu.com (Postfix) with ESMTP id 51419D5028; Tue, 7 Jun 2022 21:07:47 +0900 (JST) Received: from oym-om4.fujitsu.com (oym-om4.o.css.fujitsu.com [10.85.58.164]) by yto-m2.gw.nic.fujitsu.com (Postfix) with ESMTP id 7901FD35B2; Tue, 7 Jun 2022 21:07:46 +0900 (JST) Received: from cn-r05-10.example.com (n3235113.np.ts.nmh.cs.fujitsu.co.jp [10.123.235.113]) by oym-om4.fujitsu.com (Postfix) with ESMTP id EB3744008021D; Tue, 7 Jun 2022 21:07:45 +0900 (JST) From: Kohei Tarumizu To: catalin.marinas@arm.com, will@kernel.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, rafael@kernel.org, lenb@kernel.org, gregkh@linuxfoundation.org, mchehab+huawei@kernel.org, eugenis@google.com, tony.luck@intel.com, pcc@google.com, peterz@infradead.org, marcos@orca.pet, marcan@marcan.st, linus.walleij@linaro.org, nicolas.ferre@microchip.com, conor.dooley@microchip.com, arnd@arndb.de, ast@kernel.org, peter.chen@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-acpi@vger.kernel.org Cc: tarumizu.kohei@fujitsu.com Subject: [PATCH v5 5/6] x86: Add Kconfig/Makefile to build hardware prefetch control driver Date: Tue, 7 Jun 2022 21:05:29 +0900 Message-Id: <20220607120530.2447112-6-tarumizu.kohei@fujitsu.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20220607120530.2447112-1-tarumizu.kohei@fujitsu.com> References: <20220607120530.2447112-1-tarumizu.kohei@fujitsu.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org This adds Kconfig/Makefile to build hardware prefetch control driver for x86 support. This also adds a MAINTAINERS entry. Signed-off-by: Kohei Tarumizu --- MAINTAINERS | 1 + arch/x86/Kconfig | 17 +++++++++++++++++ arch/x86/kernel/cpu/Makefile | 2 ++ 3 files changed, 20 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index b3e920a8a044..4f44bbef2614 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -8623,6 +8623,7 @@ K: (devm_)?hwmon_device_(un)?register(|_with_groups|_with_info) HARDWARE PREFETCH CONTROL DRIVERS M: Kohei Tarumizu S: Maintained +F: arch/x86/kernel/cpu/x86-pfctl.c F: drivers/soc/fujitsu/a64fx-pfctl.c HARDWARE RANDOM NUMBER GENERATOR CORE diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 4bed3abf444d..3ee173483f9f 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -1359,6 +1359,23 @@ config X86_CPUID with major 203 and minors 0 to 31 for /dev/cpu/0/cpuid to /dev/cpu/31/cpuid. +config X86_HWPF_CONTROL + tristate "x86 Hardware Prefetch Control support" + depends on X86_64 + help + This provides a sysfs interface to control the Hardware Prefetch + behavior for X86. + + Some Intel processors have MSR 0x1a4 (MSR_MISC_FEATURE_CONTROL), + which can control the hardware prefech behavior. If the processor + supports this, the module can be loaded with the name x86-pfctl. + + Depending on the characteristics of the application, this register + parameters improve or degrade performance. + + Please see Documentation/ABI/testing/sysfs-devices-system-cpu for + more information. + choice prompt "High Memory Support" default HIGHMEM4G diff --git a/arch/x86/kernel/cpu/Makefile b/arch/x86/kernel/cpu/Makefile index 9661e3e802be..1aa13dad17a3 100644 --- a/arch/x86/kernel/cpu/Makefile +++ b/arch/x86/kernel/cpu/Makefile @@ -56,6 +56,8 @@ obj-$(CONFIG_X86_LOCAL_APIC) += perfctr-watchdog.o obj-$(CONFIG_HYPERVISOR_GUEST) += vmware.o hypervisor.o mshyperv.o obj-$(CONFIG_ACRN_GUEST) += acrn.o +obj-$(CONFIG_X86_HWPF_CONTROL) += x86-pfctl.o + ifdef CONFIG_X86_FEATURE_NAMES quiet_cmd_mkcapflags = MKCAP $@ cmd_mkcapflags = $(CONFIG_SHELL) $(srctree)/$(src)/mkcapflags.sh $@ $^