KVM_LARCH_LBT
if (!(vcpu->arch.aux_inuse & KVM_LARCH_LBT)) {
vcpu->arch.aux_inuse |= KVM_LARCH_LBT;
if (vcpu->arch.aux_inuse & KVM_LARCH_LBT) {
vcpu->arch.aux_inuse &= ~KVM_LARCH_LBT;
if (vcpu->arch.aux_inuse & KVM_LARCH_LBT)