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authorDavid Vrabel <david.vrabel@citrix.com>2013-09-23 12:47:26 +0100
committerKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2014-01-06 10:07:54 -0500
commit6ccecb0fbc0494c7221459e6358a016f3281a0ca (patch)
tree773bff549aca665df8b61825c3ef919f179a9acd /drivers/xen/events
parentbf2bbe07f13846a90d4447521d87566d6f87bc0e (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>
Diffstat (limited to 'drivers/xen/events')
-rw-r--r--drivers/xen/events/events_base.c17
1 files changed, 17 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);