diff options
| -rw-r--r-- | drivers/xen/events.c | 12 | ||||
| -rw-r--r-- | include/xen/events.h | 3 |
2 files changed, 15 insertions, 0 deletions
diff --git a/drivers/xen/events.c b/drivers/xen/events.c index ac0e22826357..0ac7a149e7f2 100644 --- a/drivers/xen/events.c +++ b/drivers/xen/events.c @@ -1508,6 +1508,18 @@ void xen_poll_irq(int irq) xen_poll_irq_timeout(irq, 0 /* no timeout */); } +/* Check whether the IRQ line is shared with other guests. */ +int xen_test_irq_shared(int irq) +{ + struct irq_info *info = info_for_irq(irq); + struct physdev_irq_status_query irq_status = { .irq = info->u.pirq.pirq }; + + if (HYPERVISOR_physdev_op(PHYSDEVOP_irq_status_query, &irq_status)) + return 0; + return !(irq_status.flags & XENIRQSTAT_shared); +} +EXPORT_SYMBOL_GPL(xen_test_irq_shared); + void xen_irq_resume(void) { unsigned int cpu, evtchn; diff --git a/include/xen/events.h b/include/xen/events.h index 9aecc0b5a0e6..932e54051d3e 100644 --- a/include/xen/events.h +++ b/include/xen/events.h @@ -95,4 +95,7 @@ int xen_destroy_irq(int irq); /* Return irq from pirq */ int xen_irq_from_pirq(unsigned pirq); +/* Determine whether to ignore this IRQ if it is passed to a guest. */ +int xen_test_irq_shared(int irq); + #endif /* _XEN_EVENTS_H */ |