KVM: x86: trap invlpg

With pages out of sync invlpg needs to be trapped. For now simply nuke
the entry.

Untested on AMD.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 88e6d9a..efee85b 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -2341,6 +2341,7 @@
 
 int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address)
 {
+	kvm_mmu_invlpg(vcpu, address);
 	return X86EMUL_CONTINUE;
 }