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Subject[PATCH 31/45] KVM: SVM: Set the 'busy' flag of the TR selector
Date
From: Amit Shah <amit.shah@redhat.com>

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@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
---
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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