Commit c6e7a602 authored by Kan Liang's avatar Kan Liang Committed by Yunying Sun
Browse files

x86/cpufeatures: Add Architectural PerfMon Extension bit 

mainline inclusion
from mainline-v6.3-rc1
commit a018d2e3
category: feature
feature: SRF core PMU support
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I8RWG5
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a018d2e3d4b1abc4a3cb64415c5d204fc5d2eafd



Intel-SIG: commit a018d2e3 x86/cpufeatures: Add Architectural PerfMon Extension bit
Backport as a dependency for Sierra Forrest core PMU support.

-------------------------------------

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: default avatarKan Liang <kan.liang@linux.intel.com>
Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
Acked-by: default avatarPeter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20230104201349.1451191-4-kan.liang@linux.intel.com


Signed-off-by: default avatarYunying Sun <yunying.sun@intel.com>
parent 7d023877

arch/x86/include/asm/cpufeatures.h

+1 −0
Original line number Diff line number Diff line
@@ -333,6 +333,7 @@ 
#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_FZRM		(12*32+10) /* "" Fast zero-length REP MOVSB */

#define X86_FEATURE_FSRS		(12*32+11) /* "" Fast short REP STOSB */

#define X86_FEATURE_FSRC		(12*32+12) /* "" Fast short REP {CMPSB,SCASB} */