IRQT_VIRQ
WARN_ON(info == NULL || info->type != IRQT_VIRQ);
if (info->type == IRQT_VIRQ) {
return xen_irq_info_common_setup(info, IRQT_VIRQ, evtchn, 0);
BUG_ON(info->type != IRQT_VIRQ);
case IRQT_VIRQ: