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KVM: nVMX: Add VMX to list of supported cpuid features

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If the "nested" module option is enabled, add the "VMX" CPU feature to the
list of CPU features KVM advertises with the KVM_GET_SUPPORTED_CPUID ioctl.

Qemu uses this ioctl, and intersects KVM's list with its own list of desired
cpu features (depending on the -cpu option given to qemu) to determine the
final list of features presented to the guest.

Signed-off-by: Nadav Har'El <nyh@il.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Nadav Har'El 2011-05-25 23:16:10 +03:00 committed by Avi Kivity
parent 7991825b85
commit 7b8050f570
1 changed files with 2 additions and 0 deletions
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2
arch/x86/kvm/vmx.c
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@ -6299,6 +6299,8 @@ static void vmx_cpuid_update(struct kvm_vcpu *vcpu)
static void vmx_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry)
{
if (func == 1 && nested)
entry->ecx |= bit(X86_FEATURE_VMX);
}
/*