[PATCH 27/29] 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@xxxxxxxxxx>
---
 arch/x86/kvm/vmx.c |    2 ++
 1 file changed, 2 insertions(+)

--- .before/arch/x86/kvm/vmx.c	2011-01-26 18:06:06.000000000 +0200
+++ .after/arch/x86/kvm/vmx.c	2011-01-26 18:06:06.000000000 +0200
@@ -6015,6 +6015,8 @@ static void vmx_cpuid_update(struct kvm_
 
 static void vmx_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry)
 {
+	if (func == 1 && nested)
+		entry->ecx |= bit(X86_FEATURE_VMX);
 }
 
 /*
--
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