From: Keir Fraser <keir.fraser@citrix.com>
Date: Wed, 12 Aug 2009 13:13:54 +0000 (+0100)
Subject: x86 svm: Fix PAT MSR handling when using Nested Paging.
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~13489
X-Git-Url: https://dgit.raspbian.org/%22http://www.example.com/cgi/success//%22http:/www.example.com/cgi/success/?a=commitdiff_plain;h=6ebb9d5ec8073d416a743739dc27108d2649830b;p=xen.git

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@amd.com>
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
---

diff --git a/xen/arch/x86/hvm/svm/vmcb.c b/xen/arch/x86/hvm/svm/vmcb.c
index 7366ecd22b..6f1f087d88 100644
--- a/xen/arch/x86/hvm/svm/vmcb.c
+++ b/xen/arch/x86/hvm/svm/vmcb.c
@@ -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
     {