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kvm: report OSXSAVE in cpuid only if xsave is supported

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Fixes #10625

PiperOrigin-RevId: 652665585
This commit is contained in:
Andrei Vagin
2024-07-15 19:09:54 -07:00
committed by gVisor bot
parent e87ab0a301
commit 6e9ad24d64
1 changed files with 3 additions and 1 deletions
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pkg/sentry/platform/kvm/kvm_amd64.go
+3 -1
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@@ -234,7 +234,9 @@ func updateGlobalOnce(fd int) error {
// explicitly set OSXSAVE, since this does not come in the feature
// entries, but can be provided when the relevant CR4 bit is set.
s := &cpuidSupported
cpuid.X86FeatureOSXSAVE.Set(s)
if cpuid.HostFeatureSet().UseXsave() {
cpuid.X86FeatureOSXSAVE.Set(s)
}
// Explicitly disable nested virtualization. Since we don't provide
// any virtualization APIs, there is no need to enable this feature.
cpuid.X86FeatureVMX.Unset(s)