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| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2022-10-13 11:58:44 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-12-29 15:33:28 -0500 |
| commit | 0fcf86f05af208e4e6c62cf1a7e7e28bc6c9d9f9 (patch) | |
| tree | 9fc55714aa88bb7fa679c56423ccdbc81d2a4ee2 /arch/x86/kvm/reverse_cpuid.h | |
| parent | b961aa757f940bebc608a412f66951e52a39a298 (diff) | |
| download | lwn-0fcf86f05af208e4e6c62cf1a7e7e28bc6c9d9f9.tar.gz lwn-0fcf86f05af208e4e6c62cf1a7e7e28bc6c9d9f9.zip | |
KVM: x86: Add a KVM-only leaf for CPUID_8000_0007_EDX
CPUID_8000_0007_EDX may come handy when X86_FEATURE_CONSTANT_TSC
needs to be checked.
No functional change intended.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20221013095849.705943-3-vkuznets@redhat.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 | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/kvm/reverse_cpuid.h b/arch/x86/kvm/reverse_cpuid.h index 203fdad07bae..25b9b51abb20 100644 --- a/arch/x86/kvm/reverse_cpuid.h +++ b/arch/x86/kvm/reverse_cpuid.h @@ -14,6 +14,7 @@ enum kvm_only_cpuid_leafs { CPUID_12_EAX = NCAPINTS, CPUID_7_1_EDX, + CPUID_8000_0007_EDX, NR_KVM_CPU_CAPS, NKVMCAPINTS = NR_KVM_CPU_CAPS - NCAPINTS, @@ -42,6 +43,9 @@ enum kvm_only_cpuid_leafs { #define X86_FEATURE_AVX_NE_CONVERT KVM_X86_FEATURE(CPUID_7_1_EDX, 5) #define X86_FEATURE_PREFETCHITI KVM_X86_FEATURE(CPUID_7_1_EDX, 14) +/* CPUID level 0x80000007 (EDX). */ +#define KVM_X86_FEATURE_CONSTANT_TSC KVM_X86_FEATURE(CPUID_8000_0007_EDX, 8) + struct cpuid_reg { u32 function; u32 index; @@ -67,6 +71,7 @@ static const struct cpuid_reg reverse_cpuid[] = { [CPUID_12_EAX] = {0x00000012, 0, CPUID_EAX}, [CPUID_8000_001F_EAX] = {0x8000001f, 0, CPUID_EAX}, [CPUID_7_1_EDX] = { 7, 1, CPUID_EDX}, + [CPUID_8000_0007_EDX] = {0x80000007, 0, CPUID_EDX}, }; /* @@ -97,6 +102,8 @@ static __always_inline u32 __feature_translate(int x86_feature) return KVM_X86_FEATURE_SGX1; else if (x86_feature == X86_FEATURE_SGX2) return KVM_X86_FEATURE_SGX2; + else if (x86_feature == X86_FEATURE_CONSTANT_TSC) + return KVM_X86_FEATURE_CONSTANT_TSC; return x86_feature; } |