From: Cathy Zhang <[email protected]> AVX512_FP16 is supported by Intel processors, like Sapphire Rapids. It could gain better performance for it's faster compared to FP32 while meets the precision or magnitude requirement. It's availability is indicated by CPUID.(EAX=7,ECX=0):EDX[bit 23].
Expose it in KVM supported CPUID, then guest could make use of it. Signed-off-by: Cathy Zhang <[email protected]> Signed-off-by: Kyung Min Park <[email protected]> Acked-by: Dave Hansen <[email protected]> Reviewed-by: Tony Luck <[email protected]> --- arch/x86/kvm/cpuid.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index e83bfe2daf82..d7707cfc9401 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -416,7 +416,7 @@ void kvm_set_cpu_caps(void) F(AVX512_4VNNIW) | F(AVX512_4FMAPS) | F(SPEC_CTRL) | F(SPEC_CTRL_SSBD) | F(ARCH_CAPABILITIES) | F(INTEL_STIBP) | F(MD_CLEAR) | F(AVX512_VP2INTERSECT) | F(FSRM) | - F(SERIALIZE) | F(TSXLDTRK) + F(SERIALIZE) | F(TSXLDTRK) | F(AVX512_FP16) ); /* TSC_ADJUST and ARCH_CAPABILITIES are emulated in software. */ -- 2.17.1
