diff mbox

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

Message ID 201105252016.p4PKGAUG011383@rice.haifa.ibm.com (mailing list archive)
State New, archived
Headers show

Commit Message

Nadav Har'El May 25, 2011, 8:16 p.m. UTC 
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(+)

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diff mbox

Patch

--- .before/arch/x86/kvm/vmx.c	2011-05-25 22:41:14.000000000 +0300
+++ .after/arch/x86/kvm/vmx.c	2011-05-25 22:41:14.000000000 +0300
@@ -6298,6 +6298,8 @@  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);
 }
 
 /*