[PATCH 31/45] KVM: SVM: Set the 'busy' flag of the TR selector

[Avi Kivity]

From: Amit Shah <amit.shah@xxxxxxxxxx>

The busy flag of the TR selector is not set by the hardware. This breaks
migration from amd hosts to intel hosts.

Signed-off-by: Amit Shah <amit.shah@xxxxxxxxxx>
Signed-off-by: Avi Kivity <avi@xxxxxxxxxx>
---
 arch/x86/kvm/svm.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 665008d..743aebd 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -781,6 +781,13 @@ static void svm_get_segment(struct kvm_vcpu *vcpu,
 	if (seg == VCPU_SREG_CS)
 		var->g = s->limit > 0xfffff;
 
+	/*
+	 * Work around a bug where the busy flag in the tr selector
+	 * isn't exposed
+	 */
+	if (seg == VCPU_SREG_TR)
+		var->type |= 0x2;
+
 	var->unusable = !var->present;
 }
 
-- 
1.6.0.3

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