Messages in this thread Patch in this message | | | Date | Thu, 30 Apr 2009 09:56:49 -0700 | From | Greg KH <> | Subject | [patch 60/88] KVM: SVM: Set the busy flag of the TR selector |
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2.6.28-stable review patch. If anyone has any objections, please let us know.
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From: Amit Shah <amit.shah@redhat.com>
(cherry picked from c0d09828c870f90c6bc72070ada281568f89c63b)
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> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> --- arch/x86/kvm/svm.c | 7 +++++++ 1 file changed, 7 insertions(+)
--- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -781,6 +781,13 @@ static void svm_get_segment(struct kvm_v 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; }
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