From: Jim Mattson Date: Thu, 1 Sep 2022 21:18:07 +0000 (-0700) Subject: KVM: x86: Advertise fast REP string features inherent to the CPU X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=2a4209d6a9cb51082813e3081e1172ae68d27935;p=linux.git KVM: x86: Advertise fast REP string features inherent to the CPU Fast zero-length REP MOVSB, fast short REP STOSB, and fast short REP {CMPSB,SCASB} are inherent features of the processor that cannot be hidden by the hypervisor. When these features are present on the host, enumerate them in KVM_GET_SUPPORTED_CPUID. Signed-off-by: Jim Mattson Reviewed-by: Sean Christopherson Link: https://lore.kernel.org/r/20220901211811.2883855-2-jmattson@google.com Signed-off-by: Sean Christopherson --- diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index 2a9f1e200dbc3..d37cdab18715f 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -664,8 +664,9 @@ 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(AMX_FP16) | - F(AVX_IFMA) + F(AVX_VNNI) | F(AVX512_BF16) | F(CMPCCXADD) | + F(FZRM) | F(FSRS) | F(FSRC) | + F(AMX_FP16) | F(AVX_IFMA) ); kvm_cpu_cap_init_kvm_defined(CPUID_7_1_EDX,