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KVM: x86: Make CR4.VMXE reserved for the guest

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CR4.VMXE is reserved unless the VMX CPUID bit is set.  On Intel,
it is also tested by vmx_set_cr4, but AMD relies on kvm_valid_cr4,
so fix it.

Reviewed-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2020-07-08 07:02:50 -04:00
parent b899c13277
commit 53efe527ca
1 changed files with 2 additions and 0 deletions
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2
arch/x86/kvm/x86.h
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@ -391,6 +391,8 @@ bool kvm_vcpu_exit_request(struct kvm_vcpu *vcpu);
__reserved_bits |= X86_CR4_LA57; \
if (!__cpu_has(__c, X86_FEATURE_UMIP)) \
__reserved_bits |= X86_CR4_UMIP; \
if (!__cpu_has(__c, X86_FEATURE_VMX)) \
__reserved_bits |= X86_CR4_VMXE; \
__reserved_bits; \
})