From: Keir Fraser <keir.fraser@citrix.com>
Date: Tue, 18 Mar 2008 15:26:35 +0000 (+0000)
Subject: svm: Reported SS.DPL must equal CPL, as this is assumed by generic HVM
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~14247^2~34
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=ed2a38e0056488669b68e607ed28416f5112c178;p=xen.git

svm: Reported SS.DPL must equal CPL, as this is assumed by generic HVM
code despite the fact that AMD processors do not always maintain this
invariant.

Based on a bug report and proposed patch by Ben Guthro and Robert
Phillips of Virtual Iron.

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

diff --git a/xen/arch/x86/hvm/svm/svm.c b/xen/arch/x86/hvm/svm/svm.c
index 6afe841d44..225c9893c9 100644
--- a/xen/arch/x86/hvm/svm/svm.c
+++ b/xen/arch/x86/hvm/svm/svm.c
@@ -495,6 +495,7 @@ static void svm_get_segment_register(struct vcpu *v, enum x86_segment seg,
         break;
     case x86_seg_ss:
         memcpy(reg, &vmcb->ss, sizeof(*reg));
+        reg->attr.fields.dpl = vmcb->cpl;
         break;
     case x86_seg_tr:
         svm_sync_vmcb(v);