diff mbox series

[kvm-unit-tests,2/2] access: treat NX as reserved if EFER.NXE=0

Message ID 20210813111225.3603660-3-pbonzini@redhat.com (mailing list archive)
State New, archived
Headers show
Series access: cut more execution time on reserved bit tests | expand

Commit Message

Paolo Bonzini Aug. 13, 2021, 11:12 a.m. UTC 
Cull more tests if EFER.NXE=0.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 x86/access.c | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/x86/access.c b/x86/access.c
index 6285c8c..4725bbd 100644
--- a/x86/access.c
+++ b/x86/access.c
@@ -324,6 +324,8 @@  static _Bool ac_test_legal(ac_test_t *at)
      */
     reserved = (AC_PDE_BIT51_MASK | AC_PDE_BIT36_MASK | AC_PDE_BIT13_MASK |
 	        AC_PTE_BIT51_MASK | AC_PTE_BIT36_MASK);
+    if (!F(AC_CPU_EFER_NX))
+        reserved |= AC_PDE_NX_MASK | AC_PTE_NX_MASK;
 
     /* Only test one reserved bit at a time.  */
     reserved &= flags;