diff options
| author | Sean Christopherson <seanjc@google.com> | 2023-08-15 13:36:49 -0700 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2023-08-17 11:43:30 -0700 |
| commit | e183d17ac362655e5ef061760245b4402b9c04f8 (patch) | |
| tree | 893ac5c4d6f63b30593184876e699e5f6c43ee54 /arch/x86/kvm/governed_features.h | |
| parent | 4d2a1560ffc29525493829ee31dc069c00c52c69 (diff) | |
| download | lwn-e183d17ac362655e5ef061760245b4402b9c04f8.tar.gz lwn-e183d17ac362655e5ef061760245b4402b9c04f8.zip | |
KVM: nSVM: Use KVM-governed feature framework to track "LBRv enabled"
Track "LBR virtualization exposed to L1" via a governed feature flag
instead of using a dedicated bit/flag in vcpu_svm.
Note, checking KVM's capabilities instead of the "lbrv" param means that
the code isn't strictly equivalent, as lbrv_enabled could have been set
if nested=false where as that the governed feature cannot. But that's a
glorified nop as the feature/flag is consumed only by paths that are
gated by nSVM being enabled.
Link: https://lore.kernel.org/r/20230815203653.519297-12-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'arch/x86/kvm/governed_features.h')
| -rw-r--r-- | arch/x86/kvm/governed_features.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/kvm/governed_features.h b/arch/x86/kvm/governed_features.h index f01a95fd0071..3a4c0e40e1e0 100644 --- a/arch/x86/kvm/governed_features.h +++ b/arch/x86/kvm/governed_features.h @@ -11,6 +11,7 @@ KVM_GOVERNED_X86_FEATURE(VMX) KVM_GOVERNED_X86_FEATURE(NRIPS) KVM_GOVERNED_X86_FEATURE(TSCRATEMSR) KVM_GOVERNED_X86_FEATURE(V_VMSAVE_VMLOAD) +KVM_GOVERNED_X86_FEATURE(LBRV) #undef KVM_GOVERNED_X86_FEATURE #undef KVM_GOVERNED_FEATURE |