Messages in this thread Patch in this message | | | From | kan.liang@linux ... | Subject | [PATCH V2 4/9] x86/cpufeatures: Add Architectural PerfMon Extension bit | Date | Wed, 4 Jan 2023 12:13:44 -0800 |
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From: Kan Liang <kan.liang@linux.intel.com>
CPUID.(EAX=07H, ECX=1):EAX[8] indicates whether the Architectural PerfMon Extension leaf (CPUID leaf 23) is supported.
The "X86_FEATURE_..., word 12" is already mirrored from CPUID "0x00000007:1 (EAX)". Add X86_FEATURE_ARCH_PERFMON_EXT under the "word 12" section.
The new Architectural PerfMon Extension leaf (CPUID leaf 23) will be supported in the perf_events subsystem later.
The feature will not appear in /proc/cpuinfo.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com> ---
Change since V1 - Rebase on top of 6.2-rc1
arch/x86/include/asm/cpufeatures.h | 1 + 1 file changed, 1 insertion(+)
diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h index 61012476d66e..b64555b68a14 100644 --- a/arch/x86/include/asm/cpufeatures.h +++ b/arch/x86/include/asm/cpufeatures.h @@ -312,6 +312,7 @@ #define X86_FEATURE_AVX_VNNI (12*32+ 4) /* AVX VNNI instructions */ #define X86_FEATURE_AVX512_BF16 (12*32+ 5) /* AVX512 BFLOAT16 instructions */ #define X86_FEATURE_CMPCCXADD (12*32+ 7) /* "" CMPccXADD instructions */ +#define X86_FEATURE_ARCH_PERFMON_EXT (12*32+ 8) /* "" Intel Architectural PerfMon Extension */ #define X86_FEATURE_AMX_FP16 (12*32+21) /* "" AMX fp16 Support */ #define X86_FEATURE_AVX_IFMA (12*32+23) /* "" Support for VPMADD52[H,L]UQ */ -- 2.35.1
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