On 10/19/22 01:47, Jiaxi Chen wrote: > diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h > index 445626cb5779..9313240e3cdd 100644 > --- a/arch/x86/include/asm/cpufeatures.h > +++ b/arch/x86/include/asm/cpufeatures.h > @@ -309,6 +309,7 @@ > #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_AMX_FP16 (12*32+21) /* AMX fp16 Support */ Please zap these from /proc/cpuinfo by doing this: #define X86_FEATURE_AMX_FP16 (12*32+21) /* "" AMX fp16 Support */ > /* AMD-defined CPU features, CPUID level 0x80000008 (EBX), word 13 */ > #define X86_FEATURE_CLZERO (13*32+ 0) /* CLZERO instruction */ > diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c > index 3f745f6fdc43..d983ddb974ba 100644 > --- a/arch/x86/kvm/cpuid.c > +++ b/arch/x86/kvm/cpuid.c > @@ -657,7 +657,7 @@ void kvm_set_cpu_caps(void) > kvm_cpu_cap_set(X86_FEATURE_SPEC_CTRL_SSBD); > > kvm_cpu_cap_mask(CPUID_7_1_EAX, > - F(AVX_VNNI) | F(AVX512_BF16) | F(CMPCCXADD) > + F(AVX_VNNI) | F(AVX512_BF16) | F(CMPCCXADD) | F(AMX_FP16) > ); > > kvm_cpu_cap_mask(CPUID_D_1_EAX, KVM folks, is the idea that every feature that is enumerated to a guest needs to be in one of these masks? Or is there something special about the features in these masks?
