diff mbox series

[RFC,10/22] KVM: x86: Make APERFMPERF a governed feature

Message ID 20241121185315.3416855-11-mizhang@google.com (mailing list archive)
State New
Headers show
Series KVM: x86: Virtualize IA32_APERF and IA32_MPERF MSRs | expand

Commit Message

Mingwei Zhang Nov. 21, 2024, 6:53 p.m. UTC 
From: Jim Mattson <jmattson@google.com>

KVM must verify both host support and guest CPUID enumeration before
enabling guest access to APERFMPERF.

This verification is deferred until the implementation of guest
APERFMPERF is complete.

This declaration enables "guest_can_use(vcpu,
X86_FEATURE_APERFMPERF)". Otherwise, that expression results in a
compile-time error.

Signed-off-by: Jim Mattson <jmattson@google.com>
Reviewed-by: Mingwei Zhang <mizhang@google.com>
Signed-off-by: Mingwei Zhang <mizhang@google.com>
---
 arch/x86/kvm/governed_features.h | 1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

diff --git a/arch/x86/kvm/governed_features.h b/arch/x86/kvm/governed_features.h
index ad463b1ed4e4a..fa77d655d2355 100644
--- a/arch/x86/kvm/governed_features.h
+++ b/arch/x86/kvm/governed_features.h
@@ -17,6 +17,7 @@  KVM_GOVERNED_X86_FEATURE(PFTHRESHOLD)
 KVM_GOVERNED_X86_FEATURE(VGIF)
 KVM_GOVERNED_X86_FEATURE(VNMI)
 KVM_GOVERNED_X86_FEATURE(LAM)
+KVM_GOVERNED_X86_FEATURE(APERFMPERF)
 
 #undef KVM_GOVERNED_X86_FEATURE
 #undef KVM_GOVERNED_FEATURE