diff options
| author | David Vrabel <david.vrabel@citrix.com> | 2013-09-23 12:47:26 +0100 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2014-01-06 10:07:54 -0500 |
| commit | 6ccecb0fbc0494c7221459e6358a016f3281a0ca (patch) | |
| tree | 773bff549aca665df8b61825c3ef919f179a9acd | |
| parent | bf2bbe07f13846a90d4447521d87566d6f87bc0e (diff) | |
xen/events: allow event channel priority to be set
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@citrix.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
| -rw-r--r-- | drivers/xen/events/events_base.c | 17 | ||||
| -rw-r--r-- | include/xen/events.h | 5 |
2 files changed, 22 insertions, 0 deletions
diff --git a/drivers/xen/events/events_base.c b/drivers/xen/events/events_base.c index 9d0d88cf74af..e9001fef4ffd 100644 --- a/drivers/xen/events/events_base.c +++ b/drivers/xen/events/events_base.c @@ -1117,6 +1117,23 @@ 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 55b42cc997f6..c9c85cf84895 100644 --- a/include/xen/events.h +++ b/include/xen/events.h @@ -39,6 +39,11 @@ 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 */ |