From: Andre Przywara <[email protected]> On AMD CPUs sometimes the DB bit in the stack segment descriptor is left as 1, although the whole segment has been made unusable. Clear it here to pass an Intel VMX entry check when cross vendor migrating.
Signed-off-by: Andre Przywara <[email protected]> Signed-off-by: Avi Kivity <[email protected]> diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 1647e81..61453e6 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -804,6 +804,15 @@ static void svm_get_segment(struct kvm_vcpu *vcpu, if (!var->unusable) var->type |= 0x1; break; + case VCPU_SREG_SS: + /* On AMD CPUs sometimes the DB bit in the segment + * descriptor is left as 1, although the whole segment has + * been made unusable. Clear it here to pass an Intel VMX + * entry check when cross vendor migrating. + */ + if (var->unusable) + var->db = 0; + break; } } -- To unsubscribe from this list: send the line "unsubscribe kvm-commits" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
