Lines Matching full:irq
9 * chip. When an event is received, it is mapped to an irq and sent
29 #include <linux/irq.h>
45 #include <asm/irq.h>
83 * Packed IRQ information:
85 * event channel - irq->event channel mapping
88 * PIRQ - vector, with MSB being "needs EIO", or physical IRQ of the HVM
89 * guest, or GSI (real passthrough IRQ) of the device.
100 unsigned irq; member
140 * Adding of event channels is no issue as the associated IRQ becomes active
141 * only after everything is setup (before request_[threaded_]irq() the handler
152 * IRQ-desc lock
158 /* IRQ <-> VIRQ mapping. */
161 /* IRQ <-> IPI mapping */
168 static bool (*pirq_needs_eoi)(unsigned irq);
207 static int set_evtchn_to_irq(evtchn_port_t evtchn, unsigned int irq) in set_evtchn_to_irq() argument
219 /* Unallocated irq entries return -1 anyway */ in set_evtchn_to_irq()
220 if (irq == -1) in set_evtchn_to_irq()
230 WRITE_ONCE(evtchn_to_irq[row][col], irq); in set_evtchn_to_irq()
243 /* Get info for IRQ */
244 static struct irq_info *info_for_irq(unsigned irq) in info_for_irq() argument
246 if (irq < nr_legacy_irqs()) in info_for_irq()
247 return legacy_info_ptrs[irq]; in info_for_irq()
249 return irq_get_chip_data(irq); in info_for_irq()
252 static void set_info_for_irq(unsigned int irq, struct irq_info *info) in set_info_for_irq() argument
254 if (irq < nr_legacy_irqs()) in set_info_for_irq()
255 legacy_info_ptrs[irq] = info; in set_info_for_irq()
257 irq_set_chip_data(irq, info); in set_info_for_irq()
260 /* Constructors for packed IRQ information. */
262 unsigned irq, in xen_irq_info_common_setup() argument
272 info->irq = irq; in xen_irq_info_common_setup()
276 ret = set_evtchn_to_irq(evtchn, irq); in xen_irq_info_common_setup()
280 irq_clear_status_flags(irq, IRQ_NOREQUEST|IRQ_NOAUTOEN); in xen_irq_info_common_setup()
285 static int xen_irq_info_evtchn_setup(unsigned irq, in xen_irq_info_evtchn_setup() argument
288 struct irq_info *info = info_for_irq(irq); in xen_irq_info_evtchn_setup()
290 return xen_irq_info_common_setup(info, irq, IRQT_EVTCHN, evtchn, 0); in xen_irq_info_evtchn_setup()
294 unsigned irq, in xen_irq_info_ipi_setup() argument
298 struct irq_info *info = info_for_irq(irq); in xen_irq_info_ipi_setup()
302 per_cpu(ipi_to_irq, cpu)[ipi] = irq; in xen_irq_info_ipi_setup()
304 return xen_irq_info_common_setup(info, irq, IRQT_IPI, evtchn, 0); in xen_irq_info_ipi_setup()
308 unsigned irq, in xen_irq_info_virq_setup() argument
312 struct irq_info *info = info_for_irq(irq); in xen_irq_info_virq_setup()
316 per_cpu(virq_to_irq, cpu)[virq] = irq; in xen_irq_info_virq_setup()
318 return xen_irq_info_common_setup(info, irq, IRQT_VIRQ, evtchn, 0); in xen_irq_info_virq_setup()
321 static int xen_irq_info_pirq_setup(unsigned irq, in xen_irq_info_pirq_setup() argument
328 struct irq_info *info = info_for_irq(irq); in xen_irq_info_pirq_setup()
335 return xen_irq_info_common_setup(info, irq, IRQT_PIRQ, evtchn, 0); in xen_irq_info_pirq_setup()
345 * Accessors for packed IRQ information.
347 evtchn_port_t evtchn_from_irq(unsigned irq) in evtchn_from_irq() argument
351 if (likely(irq < nr_irqs)) in evtchn_from_irq()
352 info = info_for_irq(irq); in evtchn_from_irq()
370 static enum ipi_vector ipi_from_irq(unsigned irq) in ipi_from_irq() argument
372 struct irq_info *info = info_for_irq(irq); in ipi_from_irq()
380 static unsigned virq_from_irq(unsigned irq) in virq_from_irq() argument
382 struct irq_info *info = info_for_irq(irq); in virq_from_irq()
390 static unsigned pirq_from_irq(unsigned irq) in pirq_from_irq() argument
392 struct irq_info *info = info_for_irq(irq); in pirq_from_irq()
400 static enum xen_irq_type type_from_irq(unsigned irq) in type_from_irq() argument
402 return info_for_irq(irq)->type; in type_from_irq()
405 static unsigned cpu_from_irq(unsigned irq) in cpu_from_irq() argument
407 return info_for_irq(irq)->cpu; in cpu_from_irq()
412 int irq = get_evtchn_to_irq(evtchn); in cpu_from_evtchn() local
415 if (irq != -1) in cpu_from_evtchn()
416 ret = cpu_from_irq(irq); in cpu_from_evtchn()
422 static bool pirq_check_eoi_map(unsigned irq) in pirq_check_eoi_map() argument
424 return test_bit(pirq_from_irq(irq), pirq_eoi_map); in pirq_check_eoi_map()
428 static bool pirq_needs_eoi_flag(unsigned irq) in pirq_needs_eoi_flag() argument
430 struct irq_info *info = info_for_irq(irq); in pirq_needs_eoi_flag()
438 int irq = get_evtchn_to_irq(evtchn); in bind_evtchn_to_cpu() local
439 struct irq_info *info = info_for_irq(irq); in bind_evtchn_to_cpu()
441 BUG_ON(irq == -1); in bind_evtchn_to_cpu()
443 cpumask_copy(irq_get_affinity_mask(irq), cpumask_of(cpu)); in bind_evtchn_to_cpu()
451 * notify_remote_via_irq - send event to remote end of event channel via irq
452 * @irq: irq of event channel to send event to
458 void notify_remote_via_irq(int irq) in notify_remote_via_irq() argument
460 evtchn_port_t evtchn = evtchn_from_irq(irq); in notify_remote_via_irq()
598 void xen_irq_lateeoi(unsigned int irq, unsigned int eoi_flags) in xen_irq_lateeoi() argument
605 info = info_for_irq(irq); in xen_irq_lateeoi()
614 static void xen_irq_init(unsigned irq) in xen_irq_init() argument
620 cpumask_copy(irq_get_affinity_mask(irq), cpumask_of(0)); in xen_irq_init()
625 panic("Unable to allocate metadata for IRQ%d\n", irq); in xen_irq_init()
630 set_info_for_irq(irq, info); in xen_irq_init()
638 int i, irq = irq_alloc_descs(-1, 0, nvec, -1); in xen_allocate_irqs_dynamic() local
640 if (irq >= 0) { in xen_allocate_irqs_dynamic()
642 xen_irq_init(irq + i); in xen_allocate_irqs_dynamic()
645 return irq; in xen_allocate_irqs_dynamic()
656 int irq; in xen_allocate_irq_gsi() local
661 * all IRQs are dynamically allocated from the entire IRQ in xen_allocate_irq_gsi()
667 /* Legacy IRQ descriptors are already allocated by the arch. */ in xen_allocate_irq_gsi()
669 irq = gsi; in xen_allocate_irq_gsi()
671 irq = irq_alloc_desc_at(gsi, -1); in xen_allocate_irq_gsi()
673 xen_irq_init(irq); in xen_allocate_irq_gsi()
675 return irq; in xen_allocate_irq_gsi()
678 static void xen_free_irq(unsigned irq) in xen_free_irq() argument
680 struct irq_info *info = info_for_irq(irq); in xen_free_irq()
693 set_info_for_irq(irq, NULL); in xen_free_irq()
701 /* Legacy IRQ descriptors are managed by the arch. */ in xen_free_irq()
702 if (irq < nr_legacy_irqs()) in xen_free_irq()
705 irq_free_desc(irq); in xen_free_irq()
717 static void pirq_query_unmask(int irq) in pirq_query_unmask() argument
720 struct irq_info *info = info_for_irq(irq); in pirq_query_unmask()
724 irq_status.irq = pirq_from_irq(irq); in pirq_query_unmask()
735 evtchn_port_t evtchn = evtchn_from_irq(data->irq); in eoi_pirq()
736 struct physdev_eoi eoi = { .irq = pirq_from_irq(data->irq) }; in eoi_pirq()
755 if (pirq_needs_eoi(data->irq)) { in eoi_pirq()
767 static unsigned int __startup_pirq(unsigned int irq) in __startup_pirq() argument
770 struct irq_info *info = info_for_irq(irq); in __startup_pirq()
771 evtchn_port_t evtchn = evtchn_from_irq(irq); in __startup_pirq()
779 bind_pirq.pirq = pirq_from_irq(irq); in __startup_pirq()
785 pr_warn("Failed to obtain physical IRQ %d\n", irq); in __startup_pirq()
790 pirq_query_unmask(irq); in __startup_pirq()
792 rc = set_evtchn_to_irq(evtchn, irq); in __startup_pirq()
805 eoi_pirq(irq_get_irq_data(irq)); in __startup_pirq()
810 pr_err("irq%d: Failed to set port to irq mapping (%d)\n", irq, rc); in __startup_pirq()
817 return __startup_pirq(data->irq); in startup_pirq()
822 unsigned int irq = data->irq; in shutdown_pirq() local
823 struct irq_info *info = info_for_irq(irq); in shutdown_pirq()
824 evtchn_port_t evtchn = evtchn_from_irq(irq); in shutdown_pirq()
855 return info->irq; in xen_irq_from_gsi()
862 static void __unbind_from_irq(unsigned int irq) in __unbind_from_irq() argument
864 evtchn_port_t evtchn = evtchn_from_irq(irq); in __unbind_from_irq()
865 struct irq_info *info = info_for_irq(irq); in __unbind_from_irq()
874 unsigned int cpu = cpu_from_irq(irq); in __unbind_from_irq()
878 switch (type_from_irq(irq)) { in __unbind_from_irq()
880 per_cpu(virq_to_irq, cpu)[virq_from_irq(irq)] = -1; in __unbind_from_irq()
883 per_cpu(ipi_to_irq, cpu)[ipi_from_irq(irq)] = -1; in __unbind_from_irq()
892 xen_free_irq(irq); in __unbind_from_irq()
897 * IRQ number returned here and the Xen pirq argument.
899 * Note: We don't assign an event channel until the irq actually started
900 * up. Return an existing irq if we've already got one for the gsi.
908 int irq = -1; in xen_bind_pirq_gsi_to_irq() local
914 irq = xen_irq_from_gsi(gsi); in xen_bind_pirq_gsi_to_irq()
915 if (irq != -1) { in xen_bind_pirq_gsi_to_irq()
916 pr_info("%s: returning irq %d for gsi %u\n", in xen_bind_pirq_gsi_to_irq()
917 __func__, irq, gsi); in xen_bind_pirq_gsi_to_irq()
921 irq = xen_allocate_irq_gsi(gsi); in xen_bind_pirq_gsi_to_irq()
922 if (irq < 0) in xen_bind_pirq_gsi_to_irq()
925 irq_op.irq = irq; in xen_bind_pirq_gsi_to_irq()
933 xen_free_irq(irq); in xen_bind_pirq_gsi_to_irq()
934 irq = -ENOSPC; in xen_bind_pirq_gsi_to_irq()
938 ret = xen_irq_info_pirq_setup(irq, 0, pirq, gsi, DOMID_SELF, in xen_bind_pirq_gsi_to_irq()
941 __unbind_from_irq(irq); in xen_bind_pirq_gsi_to_irq()
942 irq = ret; in xen_bind_pirq_gsi_to_irq()
946 pirq_query_unmask(irq); in xen_bind_pirq_gsi_to_irq()
963 irq_set_chip_and_handler_name(irq, &xen_pirq_chip, in xen_bind_pirq_gsi_to_irq()
966 irq_set_chip_and_handler_name(irq, &xen_pirq_chip, in xen_bind_pirq_gsi_to_irq()
972 return irq; in xen_bind_pirq_gsi_to_irq()
993 int i, irq, ret; in xen_bind_pirq_msi_to_irq() local
997 irq = xen_allocate_irqs_dynamic(nvec); in xen_bind_pirq_msi_to_irq()
998 if (irq < 0) in xen_bind_pirq_msi_to_irq()
1002 irq_set_chip_and_handler_name(irq + i, &xen_pirq_chip, handle_edge_irq, name); in xen_bind_pirq_msi_to_irq()
1004 ret = xen_irq_info_pirq_setup(irq + i, 0, pirq + i, 0, domid, in xen_bind_pirq_msi_to_irq()
1010 ret = irq_set_msi_desc(irq, msidesc); in xen_bind_pirq_msi_to_irq()
1015 return irq; in xen_bind_pirq_msi_to_irq()
1018 __unbind_from_irq(irq + nvec); in xen_bind_pirq_msi_to_irq()
1024 int xen_destroy_irq(int irq) in xen_destroy_irq() argument
1027 struct irq_info *info = info_for_irq(irq); in xen_destroy_irq()
1049 pr_warn("unmap irq failed %d\n", rc); in xen_destroy_irq()
1054 xen_free_irq(irq); in xen_destroy_irq()
1063 int irq; in xen_irq_from_pirq() local
1072 irq = info->irq; in xen_irq_from_pirq()
1076 irq = -1; in xen_irq_from_pirq()
1080 return irq; in xen_irq_from_pirq()
1084 int xen_pirq_from_irq(unsigned irq) in xen_pirq_from_irq() argument
1086 return pirq_from_irq(irq); in xen_pirq_from_irq()
1092 int irq; in bind_evtchn_to_irq_chip() local
1100 irq = get_evtchn_to_irq(evtchn); in bind_evtchn_to_irq_chip()
1102 if (irq == -1) { in bind_evtchn_to_irq_chip()
1103 irq = xen_allocate_irq_dynamic(); in bind_evtchn_to_irq_chip()
1104 if (irq < 0) in bind_evtchn_to_irq_chip()
1107 irq_set_chip_and_handler_name(irq, chip, in bind_evtchn_to_irq_chip()
1110 ret = xen_irq_info_evtchn_setup(irq, evtchn); in bind_evtchn_to_irq_chip()
1112 __unbind_from_irq(irq); in bind_evtchn_to_irq_chip()
1113 irq = ret; in bind_evtchn_to_irq_chip()
1119 struct irq_info *info = info_for_irq(irq); in bind_evtchn_to_irq_chip()
1126 return irq; in bind_evtchn_to_irq_chip()
1145 int ret, irq; in bind_ipi_to_irq() local
1149 irq = per_cpu(ipi_to_irq, cpu)[ipi]; in bind_ipi_to_irq()
1151 if (irq == -1) { in bind_ipi_to_irq()
1152 irq = xen_allocate_irq_dynamic(); in bind_ipi_to_irq()
1153 if (irq < 0) in bind_ipi_to_irq()
1156 irq_set_chip_and_handler_name(irq, &xen_percpu_chip, in bind_ipi_to_irq()
1165 ret = xen_irq_info_ipi_setup(cpu, irq, evtchn, ipi); in bind_ipi_to_irq()
1167 __unbind_from_irq(irq); in bind_ipi_to_irq()
1168 irq = ret; in bind_ipi_to_irq()
1173 struct irq_info *info = info_for_irq(irq); in bind_ipi_to_irq()
1179 return irq; in bind_ipi_to_irq()
1247 int irq, ret; in bind_virq_to_irq() local
1251 irq = per_cpu(virq_to_irq, cpu)[virq]; in bind_virq_to_irq()
1253 if (irq == -1) { in bind_virq_to_irq()
1254 irq = xen_allocate_irq_dynamic(); in bind_virq_to_irq()
1255 if (irq < 0) in bind_virq_to_irq()
1259 irq_set_chip_and_handler_name(irq, &xen_percpu_chip, in bind_virq_to_irq()
1262 irq_set_chip_and_handler_name(irq, &xen_dynamic_chip, in bind_virq_to_irq()
1277 ret = xen_irq_info_virq_setup(cpu, irq, evtchn, virq); in bind_virq_to_irq()
1279 __unbind_from_irq(irq); in bind_virq_to_irq()
1280 irq = ret; in bind_virq_to_irq()
1286 struct irq_info *info = info_for_irq(irq); in bind_virq_to_irq()
1293 return irq; in bind_virq_to_irq()
1296 static void unbind_from_irq(unsigned int irq) in unbind_from_irq() argument
1299 __unbind_from_irq(irq); in unbind_from_irq()
1309 int irq, retval; in bind_evtchn_to_irqhandler_chip() local
1311 irq = bind_evtchn_to_irq_chip(evtchn, chip); in bind_evtchn_to_irqhandler_chip()
1312 if (irq < 0) in bind_evtchn_to_irqhandler_chip()
1313 return irq; in bind_evtchn_to_irqhandler_chip()
1314 retval = request_irq(irq, handler, irqflags, devname, dev_id); in bind_evtchn_to_irqhandler_chip()
1316 unbind_from_irq(irq); in bind_evtchn_to_irqhandler_chip()
1320 return irq; in bind_evtchn_to_irqhandler_chip()
1350 int irq, retval; in bind_interdomain_evtchn_to_irqhandler_chip() local
1352 irq = bind_interdomain_evtchn_to_irq_chip(remote_domain, remote_port, in bind_interdomain_evtchn_to_irqhandler_chip()
1354 if (irq < 0) in bind_interdomain_evtchn_to_irqhandler_chip()
1355 return irq; in bind_interdomain_evtchn_to_irqhandler_chip()
1357 retval = request_irq(irq, handler, irqflags, devname, dev_id); in bind_interdomain_evtchn_to_irqhandler_chip()
1359 unbind_from_irq(irq); in bind_interdomain_evtchn_to_irqhandler_chip()
1363 return irq; in bind_interdomain_evtchn_to_irqhandler_chip()
1383 int irq, retval; in bind_virq_to_irqhandler() local
1385 irq = bind_virq_to_irq(virq, cpu, irqflags & IRQF_PERCPU); in bind_virq_to_irqhandler()
1386 if (irq < 0) in bind_virq_to_irqhandler()
1387 return irq; in bind_virq_to_irqhandler()
1388 retval = request_irq(irq, handler, irqflags, devname, dev_id); in bind_virq_to_irqhandler()
1390 unbind_from_irq(irq); in bind_virq_to_irqhandler()
1394 return irq; in bind_virq_to_irqhandler()
1405 int irq, retval; in bind_ipi_to_irqhandler() local
1407 irq = bind_ipi_to_irq(ipi, cpu); in bind_ipi_to_irqhandler()
1408 if (irq < 0) in bind_ipi_to_irqhandler()
1409 return irq; in bind_ipi_to_irqhandler()
1412 retval = request_irq(irq, handler, irqflags, devname, dev_id); in bind_ipi_to_irqhandler()
1414 unbind_from_irq(irq); in bind_ipi_to_irqhandler()
1418 return irq; in bind_ipi_to_irqhandler()
1421 void unbind_from_irqhandler(unsigned int irq, void *dev_id) in unbind_from_irqhandler() argument
1423 struct irq_info *info = info_for_irq(irq); in unbind_from_irqhandler()
1427 free_irq(irq, dev_id); in unbind_from_irqhandler()
1428 unbind_from_irq(irq); in unbind_from_irqhandler()
1434 * @irq:irq bound to an event channel.
1437 int xen_set_irq_priority(unsigned irq, unsigned priority) in xen_set_irq_priority() argument
1441 set_priority.port = evtchn_from_irq(irq); in xen_set_irq_priority()
1451 int irq = get_evtchn_to_irq(evtchn); in evtchn_make_refcounted() local
1454 if (irq == -1) in evtchn_make_refcounted()
1457 info = info_for_irq(irq); in evtchn_make_refcounted()
1472 int irq; in evtchn_get() local
1481 irq = get_evtchn_to_irq(evtchn); in evtchn_get()
1482 if (irq == -1) in evtchn_get()
1485 info = info_for_irq(irq); in evtchn_get()
1505 int irq = get_evtchn_to_irq(evtchn); in evtchn_put() local
1506 if (WARN_ON(irq == -1)) in evtchn_put()
1508 unbind_from_irq(irq); in evtchn_put()
1514 int irq; in xen_send_IPI_one() local
1525 irq = per_cpu(ipi_to_irq, cpu)[vector]; in xen_send_IPI_one()
1526 BUG_ON(irq < 0); in xen_send_IPI_one()
1527 notify_remote_via_irq(irq); in xen_send_IPI_one()
1538 int irq; in handle_irq_for_port() local
1541 irq = get_evtchn_to_irq(port); in handle_irq_for_port()
1542 if (irq == -1) in handle_irq_for_port()
1567 info = info_for_irq(irq); in handle_irq_for_port()
1575 generic_handle_irq(irq); in handle_irq_for_port()
1625 /* Rebind a new event channel to an existing irq. */
1626 void rebind_evtchn_irq(evtchn_port_t evtchn, int irq) in rebind_evtchn_irq() argument
1628 struct irq_info *info = info_for_irq(irq); in rebind_evtchn_irq()
1633 /* Make sure the irq is masked, since the new event channel in rebind_evtchn_irq()
1635 disable_irq(irq); in rebind_evtchn_irq()
1639 /* After resume the irq<->evtchn mappings are all cleared out */ in rebind_evtchn_irq()
1641 /* Expect irq to have been bound before, in rebind_evtchn_irq()
1645 (void)xen_irq_info_evtchn_setup(irq, evtchn); in rebind_evtchn_irq()
1651 irq_set_affinity(irq, cpumask_of(info->cpu)); in rebind_evtchn_irq()
1654 enable_irq(irq); in rebind_evtchn_irq()
1697 int ret = xen_rebind_evtchn_to_cpu(evtchn_from_irq(data->irq), tcpu); in set_affinity_irq()
1716 evtchn_port_t evtchn = evtchn_from_irq(data->irq); in enable_dynirq()
1724 evtchn_port_t evtchn = evtchn_from_irq(data->irq); in disable_dynirq()
1732 evtchn_port_t evtchn = evtchn_from_irq(data->irq); in ack_dynirq()
1759 evtchn_port_t evtchn = evtchn_from_irq(data->irq); in retrigger_dynirq()
1775 int pirq, rc, irq, gsi; in restore_pirqs() local
1785 irq = info->irq; in restore_pirqs()
1799 pr_warn("xen map irq failed gsi=%d irq=%d pirq=%d rc=%d\n", in restore_pirqs()
1800 gsi, irq, pirq, rc); in restore_pirqs()
1801 xen_free_irq(irq); in restore_pirqs()
1805 printk(KERN_DEBUG "xen: --> irq=%d, pirq=%d\n", irq, map_irq.pirq); in restore_pirqs()
1807 __startup_pirq(irq); in restore_pirqs()
1815 int virq, irq; in restore_cpu_virqs() local
1818 if ((irq = per_cpu(virq_to_irq, cpu)[virq]) == -1) in restore_cpu_virqs()
1821 BUG_ON(virq_from_irq(irq) != virq); in restore_cpu_virqs()
1832 (void)xen_irq_info_virq_setup(cpu, irq, evtchn, virq); in restore_cpu_virqs()
1841 int ipi, irq; in restore_cpu_ipis() local
1844 if ((irq = per_cpu(ipi_to_irq, cpu)[ipi]) == -1) in restore_cpu_ipis()
1847 BUG_ON(ipi_from_irq(irq) != ipi); in restore_cpu_ipis()
1857 (void)xen_irq_info_ipi_setup(cpu, irq, evtchn, ipi); in restore_cpu_ipis()
1862 /* Clear an irq's pending state, in preparation for polling on it */
1863 void xen_clear_irq_pending(int irq) in xen_clear_irq_pending() argument
1865 evtchn_port_t evtchn = evtchn_from_irq(irq); in xen_clear_irq_pending()
1871 void xen_set_irq_pending(int irq) in xen_set_irq_pending() argument
1873 evtchn_port_t evtchn = evtchn_from_irq(irq); in xen_set_irq_pending()
1879 bool xen_test_irq_pending(int irq) in xen_test_irq_pending() argument
1881 evtchn_port_t evtchn = evtchn_from_irq(irq); in xen_test_irq_pending()
1890 /* Poll waiting for an irq to become pending with timeout. In the usual case,
1891 * the irq will be disabled so it won't deliver an interrupt. */
1892 void xen_poll_irq_timeout(int irq, u64 timeout) in xen_poll_irq_timeout() argument
1894 evtchn_port_t evtchn = evtchn_from_irq(irq); in xen_poll_irq_timeout()
1908 /* Poll waiting for an irq to become pending. In the usual case, the
1909 * irq will be disabled so it won't deliver an interrupt. */
1910 void xen_poll_irq(int irq) in xen_poll_irq() argument
1912 xen_poll_irq_timeout(irq, 0 /* no timeout */); in xen_poll_irq()
1915 /* Check whether the IRQ line is shared with other guests. */
1916 int xen_test_irq_shared(int irq) in xen_test_irq_shared() argument
1918 struct irq_info *info = info_for_irq(irq); in xen_test_irq_shared()
1924 irq_status.irq = info->u.pirq.pirq; in xen_test_irq_shared()
1940 /* No IRQ <-> event-channel mappings. */ in xen_irq_resume()