From: Kohei Tarumizu <tarumizu.kohei@fujitsu.com>
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 [thread overview]
Message-ID: <20220607120530.2447112-6-tarumizu.kohei@fujitsu.com> (raw)
In-Reply-To: <20220607120530.2447112-1-tarumizu.kohei@fujitsu.com>
This adds Kconfig/Makefile to build hardware prefetch control driver
for x86 support. This also adds a MAINTAINERS entry.
Signed-off-by: Kohei Tarumizu <tarumizu.kohei@fujitsu.com>
---
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 <tarumizu.kohei@fujitsu.com>
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 $@ $^
--
2.27.0
next prev parent reply other threads:[~2022-06-07 12:09 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-07 12:05 [PATCH v5 0/6] Add hardware prefetch control driver for A64FX and x86 Kohei Tarumizu
2022-06-07 12:05 ` [PATCH v5 1/6] soc: fujitsu: Add hardware prefetch control driver for A64FX Kohei Tarumizu
2022-06-10 13:20 ` Greg KH
2022-06-07 12:05 ` [PATCH v5 2/6] soc: fujitsu: Add Kconfig/Makefile to build hardware prefetch control driver Kohei Tarumizu
2022-06-07 14:40 ` Randy Dunlap
2022-06-07 12:05 ` [PATCH v5 3/6] arm64: Create cache sysfs directory without ACPI PPTT for hardware prefetch control Kohei Tarumizu
2022-06-07 12:05 ` [PATCH v5 4/6] x86: Add hardware prefetch control driver for x86 Kohei Tarumizu
2022-06-07 12:05 ` Kohei Tarumizu [this message]
2022-06-07 14:40 ` [PATCH v5 5/6] x86: Add Kconfig/Makefile to build hardware prefetch control driver Randy Dunlap
2022-06-08 6:11 ` tarumizu.kohei
2022-06-07 12:05 ` [PATCH v5 6/6] docs: ABI: Add sysfs documentation interface of " Kohei Tarumizu
2022-06-10 13:07 ` [PATCH v5 0/6] Add hardware prefetch control driver for A64FX and x86 Greg KH
2022-06-14 11:55 ` tarumizu.kohei
2022-06-14 12:34 ` 'Greg KH'
2022-06-17 9:20 ` tarumizu.kohei
2022-06-27 9:36 ` Linus Walleij
2022-06-28 13:55 ` tarumizu.kohei
2022-06-28 16:39 ` Luck, Tony
2022-06-30 5:24 ` tarumizu.kohei
2022-06-28 15:46 ` Dave Hansen
2022-06-28 20:20 ` Linus Walleij
2022-06-28 21:01 ` Dave Hansen
2022-06-28 21:17 ` Linus Walleij
2022-06-30 9:43 ` tarumizu.kohei
2022-06-10 13:48 ` Linus Walleij
2022-06-17 9:06 ` tarumizu.kohei
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