SERIALIZE instruction is supported by intel processors, like Sapphire Rapids. Expose it in KVM supported cpuid. The SERIALIZE enumeration kernel patch link is as follows: https://lore.kernel.org/patchwork/patch/1254757/ Signed-off-by: Cathy Zhang <cathy.zhang@xxxxxxxxx> --- arch/x86/kvm/cpuid.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index 8a294f9..e603aeb 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -341,7 +341,8 @@ void kvm_set_cpu_caps(void) kvm_cpu_cap_mask(CPUID_7_EDX, 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(MD_CLEAR) | F(AVX512_VP2INTERSECT) | F(FSRM) | + F(SERIALIZE) ); /* TSC_ADJUST and ARCH_CAPABILITIES are emulated in software. */ -- 1.8.3.1
