[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH 14/16] xen/events: allow event channel priority to be set
From: David Vrabel <david.vrabel@xxxxxxxxxx> Add xen_irq_set_priority() to set an event channels priority. This function will only work with event channel ABIs that support priority (i.e., the FIFO-based ABI). Signed-off-by: David Vrabel <david.vrabel@xxxxxxxxxx> --- drivers/xen/events/events.c | 17 +++++++++++++++++ include/xen/events.h | 5 +++++ 2 files changed, 22 insertions(+), 0 deletions(-) diff --git a/drivers/xen/events/events.c b/drivers/xen/events/events.c index 0ebb10c..fd65485 100644 --- a/drivers/xen/events/events.c +++ b/drivers/xen/events/events.c @@ -1092,6 +1092,23 @@ void unbind_from_irqhandler(unsigned int irq, void *dev_id) } EXPORT_SYMBOL_GPL(unbind_from_irqhandler); +/** + * xen_set_irq_priority() - set an event channel priority. + * @irq:irq bound to an event channel. + * @priority: priority between XEN_IRQ_PRIORITY_MAX and XEN_IRQ_PRIORITY_MIN. + */ +int xen_set_irq_priority(unsigned irq, unsigned priority) +{ + struct evtchn_set_priority set_priority; + + set_priority.port = evtchn_from_irq(irq); + set_priority.priority = priority; + + return HYPERVISOR_event_channel_op(EVTCHNOP_set_priority, + &set_priority); +} +EXPORT_SYMBOL_GPL(xen_set_irq_priority); + int evtchn_make_refcounted(unsigned int evtchn) { int irq = get_evtchn_to_irq(evtchn); diff --git a/include/xen/events.h b/include/xen/events.h index c9ea10e..d265d7e 100644 --- a/include/xen/events.h +++ b/include/xen/events.h @@ -37,6 +37,11 @@ int bind_interdomain_evtchn_to_irqhandler(unsigned int remote_domain, */ void unbind_from_irqhandler(unsigned int irq, void *dev_id); +#define XEN_IRQ_PRIORITY_MAX EVTCHN_FIFO_PRIORITY_MAX +#define XEN_IRQ_PRIORITY_DEFAULT EVTCHN_FIFO_PRIORITY_DEFAULT +#define XEN_IRQ_PRIORITY_MIN EVTCHN_FIFO_PRIORITY_MIN +int xen_set_irq_priority(unsigned irq, unsigned priority); + /* * Allow extra references to event channels exposed to userspace by evtchn */ -- 1.7.2.5 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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