KVM: MMU: Move pte access calculation into a helper function

Signed-off-by: Avi Kivity <avi@qumranet.com>

1 files changed, 13 insertions, 7 deletions

diff --git a/drivers/kvm/paging_tmpl.h b/drivers/kvm/paging_tmpl.h
index 59ba752a6880..1fc4f9b321ee 100644
--- a/drivers/kvm/paging_tmpl.h
+++ b/drivers/kvm/paging_tmpl.h
@@ -102,6 +102,18 @@ static bool FNAME(cmpxchg_gpte)(struct kvm *kvm,
         return (ret != orig_pte);
 }
 
+static unsigned FNAME(gpte_access)(struct kvm_vcpu *vcpu, pt_element_t gpte)
+{
+        unsigned access;
+
+        access = (gpte & (PT_WRITABLE_MASK | PT_USER_MASK)) | ACC_EXEC_MASK;
+#if PTTYPE == 64
+        if (is_nx(vcpu))
+                access &= ~(gpte >> PT64_NX_SHIFT);
+#endif
+        return access;
+}
+
 /*
  * Fetch a guest pte for a guest virtual address
  */
@@ -166,13 +178,7 @@ walk:
                         pte |= PT_ACCESSED_MASK;
                 }
 
-                pte_access = pte & (PT_WRITABLE_MASK | PT_USER_MASK);
-                pte_access |= ACC_EXEC_MASK;
-#if PTTYPE == 64
-                if (is_nx(vcpu))
-                        pte_access &= ~(pte >> PT64_NX_SHIFT);
-#endif
-                pte_access &= pt_access;
+                pte_access = pt_access & FNAME(gpte_access)(vcpu, pte);
 
                 if (walker->level == PT_PAGE_TABLE_LEVEL) {
                         walker->gfn = gpte_to_gfn(pte);