Commit f8df91e7 authored by Jim Mattson's avatar Jim Mattson Committed by Sean Christopherson
Browse files

x86/cpufeatures: Add macros for Intel's new fast rep string features 



KVM_GET_SUPPORTED_CPUID should reflect these host CPUID bits. The bits
are already cached in word 12. Give the bits X86_FEATURE names, so
that they can be easily referenced. Hide these bits from
/proc/cpuinfo, since the host kernel makes no use of them at present.

Signed-off-by: default avatarJim Mattson <jmattson@google.com>
Reviewed-by: default avatarSean Christopherson <seanjc@google.com>
Link: https://lore.kernel.org/r/20220901211811.2883855-1-jmattson@google.com


Signed-off-by: default avatarSean Christopherson <seanjc@google.com>
parent 7cb79f43

arch/x86/include/asm/cpufeatures.h

+3 −0
Original line number Diff line number Diff line
@@ -312,6 +312,9 @@ 
#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_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} */

#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 */