Fix check if guest enabled nested paging.

Fixes crashes with Windows guests when shadow-on-nested is used.

Signed-off-by: Christoph Egger <Christoph.Egger@amd.com>
Acked-by: Tim Deegan <tim@xen.org>

diff --git a/xen/arch/x86/hvm/svm/nestedsvm.c b/xen/arch/x86/hvm/svm/nestedsvm.c
index 6ed32604cfc403d9167dd02329c41ec670280a51..0b6ff8867231a39679744a3d09855ed20e1632e3 100644 (file)
--- a/xen/arch/x86/hvm/svm/nestedsvm.c
+++ b/xen/arch/x86/hvm/svm/nestedsvm.c
@@ -935,6 +935,9 @@ nsvm_vmcb_guest_intercepts_exitcode(struct vcpu *v,
         return 0;
 
     case VMEXIT_NPF:
+        if (nestedhvm_paging_mode_hap(v))
+            break;
+        return 0;
     case VMEXIT_INVALID:
         /* Always intercepted */
         break;