From: Jan Kiszka <jan.kiszka@siemens.com>
Date: Sun, 29 Jun 2014 15:12:43 +0000 (+0200)
Subject: KVM: SVM: Fix CPL export via SS.DPL
X-Git-Tag: v3.16-rc4~21^2^2
X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=33b458d276bbdbe28febac0742835002b9f4778d;p=~emulex%2Finfiniband.git

KVM: SVM: Fix CPL export via SS.DPL

We import the CPL via SS.DPL since ae9fedc793. However, we fail to
export it this way so far. This caused spurious guest crashes, e.g. of
Linux when accessing the vmport from guest user space which triggered
register saving/restoring to/from host user space.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index ec8366c5cfe..b5e994ad013 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -1462,6 +1462,7 @@ static void svm_get_segment(struct kvm_vcpu *vcpu,
 		 */
 		if (var->unusable)
 			var->db = 0;
+		var->dpl = to_svm(vcpu)->vmcb->save.cpl;
 		break;
 	}
 }