[Xen-changelog] [xen-unstable] x86 svm: Fix PAT MSR handling when using Nested Paging.

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

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1250082834 -3600
# Node ID b3893b54d88533950ad72c32991e3f2cde05f89b
# Parent  481f730c944622ca891b1f87ae14c8b1052413cd
x86 svm: Fix PAT MSR handling when using Nested Paging.

Accesses to the MSR should not be intercepted.

Signed-off-by: Christoph Egger <Christoph.Egger@xxxxxxx>
Signed-off-by: Keir Fraser <keir.fraser@xxxxxxxxxx>
---
 xen/arch/x86/hvm/svm/vmcb.c |    3 +++
 1 files changed, 3 insertions(+)

diff -r 481f730c9446 -r b3893b54d885 xen/arch/x86/hvm/svm/vmcb.c
--- a/xen/arch/x86/hvm/svm/vmcb.c       Wed Aug 12 14:13:00 2009 +0100
+++ b/xen/arch/x86/hvm/svm/vmcb.c       Wed Aug 12 14:13:54 2009 +0100
@@ -243,6 +243,9 @@ static int construct_vmcb(struct vcpu *v
          * that need to be fixed up.
          */
         vmcb->general1_intercepts &= ~GENERAL1_INTERCEPT_INVLPG;
+
+        /* PAT is under complete control of SVM when using nested paging. */
+        svm_disable_intercept_for_msr(v, MSR_IA32_CR_PAT);
     }
     else
     {

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