[Xen-changelog] [xen-unstable] [SVM] Clear VMCB's EFER.LME when guest disables paging

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Travis Betak <travis.betak@xxxxxxx>
# Date 1173133341 21600
# Node ID c8843678cb9bac670366f68d07668b0d037b624d
# Parent  8bae3387b86c1918e409d6e0e766dfa0874cf83d
[SVM] Clear VMCB's EFER.LME when guest disables paging

Since the guest's CR0.PG is always set (in shadow paging), EFER.LME must
be cleared along with EFER.LMA when the guest is disabling paging.

Signed-off-by: Travis Betak <travis.betak@xxxxxxx>
---
 xen/arch/x86/hvm/svm/svm.c |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

diff -r 8bae3387b86c -r c8843678cb9b xen/arch/x86/hvm/svm/svm.c
--- a/xen/arch/x86/hvm/svm/svm.c        Mon Mar 05 16:21:50 2007 -0600
+++ b/xen/arch/x86/hvm/svm/svm.c        Mon Mar 05 16:22:21 2007 -0600
@@ -1787,7 +1787,7 @@ static int svm_set_cr0(unsigned long val
     {
         if ( svm_long_mode_enabled(v) )
         {
-            vmcb->efer &= ~EFER_LMA;
+            vmcb->efer &= ~(EFER_LME | EFER_LMA);
             v->arch.hvm_svm.cpu_shadow_efer &= ~EFER_LMA;
         }
         /* we should take care of this kind of situation */

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