From: Xin Li <xin3.li@xxxxxxxxx> Allow WRMSRNS to be advertised to guests. WRMSRNS behaves exactly like WRMSR with the only difference being that it is not a serializing instruction by default. It improves performance when being used in a hot path, e.g., setting FRED RSP0. Signed-off-by: Xin Li <xin3.li@xxxxxxxxx> Signed-off-by: Xin Li (Intel) <xin@xxxxxxxxx> Tested-by: Shan Kang <shan.kang@xxxxxxxxx> --- 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 c55d150ece8d..63a78ebf9482 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -700,7 +700,7 @@ void kvm_set_cpu_caps(void) kvm_cpu_cap_mask(CPUID_7_1_EAX, F(AVX_VNNI) | F(AVX512_BF16) | F(CMPCCXADD) | F(FZRM) | F(FSRS) | F(FSRC) | F(FRED) | F(LKGS) | - F(AMX_FP16) | F(AVX_IFMA) | F(LAM) + F(WRMSRNS) | F(AMX_FP16) | F(AVX_IFMA) | F(LAM) ); kvm_cpu_cap_init_kvm_defined(CPUID_7_1_EDX, -- 2.46.2
