diff options
| author | Sean Christopherson <seanjc@google.com> | 2023-08-15 13:36:47 -0700 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2023-08-17 11:43:28 -0700 |
| commit | 4365a45571c791a2fbeb81cf27738960c5456f57 (patch) | |
| tree | 8963d912fde7ac18ed978010c41cd4a934f1ebae /arch/x86/kvm/governed_features.h | |
| parent | 7a6a6a3bf5d8c32a91d8fabb0e2d31f3bd23a412 (diff) | |
KVM: nSVM: Use KVM-governed feature framework to track "TSC scaling enabled"
Track "TSC scaling exposed to L1" via a governed feature flag instead of
using a dedicated bit/flag in vcpu_svm.
Note, this fixes a benign bug where KVM would mark TSC scaling as exposed
to L1 even if overall nested SVM supported is disabled, i.e. KVM would let
L1 write MSR_AMD64_TSC_RATIO even when KVM didn't advertise TSCRATEMSR
support to userspace.
Reviewed-by: Yuan Yao <yuan.yao@intel.com>
Link: https://lore.kernel.org/r/20230815203653.519297-10-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 722b66af412c..32c0469cf952 100644 --- a/arch/x86/kvm/governed_features.h +++ b/arch/x86/kvm/governed_features.h @@ -9,6 +9,7 @@ KVM_GOVERNED_X86_FEATURE(GBPAGES) KVM_GOVERNED_X86_FEATURE(XSAVES) KVM_GOVERNED_X86_FEATURE(VMX) KVM_GOVERNED_X86_FEATURE(NRIPS) +KVM_GOVERNED_X86_FEATURE(TSCRATEMSR) #undef KVM_GOVERNED_X86_FEATURE #undef KVM_GOVERNED_FEATURE |