KVM: nSVM: Use KVM-governed feature framework to track "LBRv enabled"

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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>

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This commit is contained in:

Sean Christopherson 2023-08-15 13:36:49 -07:00

parent 4d2a1560ff

commit e183d17ac3

4 changed files with 16 additions and 14 deletions

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1

arch/x86/kvm/governed_features.h

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arch/x86/kvm/svm/nested.c

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5

arch/x86/kvm/svm/svm.c

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arch/x86/kvm/svm/svm.h

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