[PATCH 29/31] nVMX: Add VMX to list of supported cpuid features

["Nadav Har'El" <nyh@il.ibm.com>]

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>
---
 arch/x86/kvm/vmx.c |    2 ++
 1 file changed, 2 insertions(+)

--- .before/arch/x86/kvm/vmx.c	2011-05-16 22:36:50.000000000 +0300
+++ .after/arch/x86/kvm/vmx.c	2011-05-16 22:36:50.000000000 +0300
@@ -6325,6 +6325,8 @@ 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);
 }
 
 /*