| Message ID | 20220607120530.2447112-6-tarumizu.kohei@fujitsu.com |
|---|---|
| State | New |
| Headers | show |
| Series | Add hardware prefetch control driver for A64FX and x86 | expand |
On 6/7/22 05:05, Kohei Tarumizu wrote: > 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 prefetch > + 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. > +
> > + which can control the hardware prefech behavior. If the processor > > prefetch > I'll fix it, thank you.
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 $@ $^
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(+)