xen_bind_virq
if ((err = xen_bind_virq(bind.virq, 0, rvalp)) != 0)
err = xen_bind_virq(virq, i, &evtchn);
err = xen_bind_virq(virq, cpu, &evtchn);
extern int xen_bind_virq(unsigned int, processorid_t, int *);