diff options
| author | Tao Su <tao1.su@linux.intel.com> | 2024-11-05 13:48:25 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2024-11-13 14:40:40 -0500 |
| commit | a0423af92cb31e6fc4f53ef9b6e19fdf08ad4395 (patch) | |
| tree | 82852ff667b5a5a8b8258fa9aaa5efc0c1502b89 /arch/x86/kvm/reverse_cpuid.h | |
| parent | 35ff7bfb04af6d07af677357a15493ca0fbd739e (diff) | |
x86: KVM: Advertise CPUIDs for new instructions in Clearwater Forest
Latest Intel platform Clearwater Forest has introduced new instructions
enumerated by CPUIDs of SHA512, SM3, SM4 and AVX-VNNI-INT16. Advertise
these CPUIDs to userspace so that guests can query them directly.
SHA512, SM3 and SM4 are on an expected-dense CPUID leaf and some other
bits on this leaf have kernel usages. Considering they have not truly
kernel usages, hide them in /proc/cpuinfo.
These new instructions only operate in xmm, ymm registers and have no new
VMX controls, so there is no additional host enabling required for guests
to use these instructions, i.e. advertising these CPUIDs to userspace is
safe.
Tested-by: Jiaan Lu <jiaan.lu@intel.com>
Tested-by: Xuelian Guo <xuelian.guo@intel.com>
Signed-off-by: Tao Su <tao1.su@linux.intel.com>
Message-ID: <20241105054825.870939-1-tao1.su@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/reverse_cpuid.h')
| -rw-r--r-- | arch/x86/kvm/reverse_cpuid.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/kvm/reverse_cpuid.h b/arch/x86/kvm/reverse_cpuid.h index 0d17d6b70639..e46220ece83c 100644 --- a/arch/x86/kvm/reverse_cpuid.h +++ b/arch/x86/kvm/reverse_cpuid.h @@ -46,6 +46,7 @@ enum kvm_only_cpuid_leafs { #define X86_FEATURE_AVX_VNNI_INT8 KVM_X86_FEATURE(CPUID_7_1_EDX, 4) #define X86_FEATURE_AVX_NE_CONVERT KVM_X86_FEATURE(CPUID_7_1_EDX, 5) #define X86_FEATURE_AMX_COMPLEX KVM_X86_FEATURE(CPUID_7_1_EDX, 8) +#define X86_FEATURE_AVX_VNNI_INT16 KVM_X86_FEATURE(CPUID_7_1_EDX, 10) #define X86_FEATURE_PREFETCHITI KVM_X86_FEATURE(CPUID_7_1_EDX, 14) #define X86_FEATURE_AVX10 KVM_X86_FEATURE(CPUID_7_1_EDX, 19) |