[PATCH V4 2/4] KVM: SVM: Inject #UD for INVLPGA if EFER.SVME=0

[Kevin Cheng]

INVLPGA should cause a #UD when EFER.SVME is not set. Add a check to
properly inject #UD when EFER.SVME=0.

Signed-off-by: Kevin Cheng <chengkev@xxxxxxxxxx>
Reviewed-by: Yosry Ahmed <yosry.ahmed@xxxxxxxxx>
---
 arch/x86/kvm/svm/svm.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 25b15934330bb..249bc3efe993a 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -2386,6 +2386,9 @@ static int invlpga_interception(struct kvm_vcpu *vcpu)
 	gva_t gva = kvm_rax_read(vcpu);
 	u32 asid = kvm_rcx_read(vcpu);

+	if (nested_svm_check_permissions(vcpu))
+		return 1;
+
 	/* FIXME: Handle an address size prefix. */
 	if (!is_long_mode(vcpu))
 		gva = (u32)gva;
--
2.53.0.473.g4a7958ca14-goog