From a018d2e3d4b1abc4a3cb64415c5d204fc5d2eafd Mon Sep 17 00:00:00 2001 From: Kan Liang Date: Wed, 4 Jan 2023 12:13:44 -0800 Subject: [PATCH] x86/cpufeatures: Add Architectural PerfMon Extension bit 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 Signed-off-by: Ingo Molnar Acked-by: Peter Zijlstra Link: https://lore.kernel.org/r/20230104201349.1451191-4-kan.liang@linux.intel.com --- 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 6101247..b64555b 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 */ -- 2.7.4