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authorDavid Vrabel <david.vrabel@citrix.com>2013-03-18 16:54:57 +0000
committerKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2014-01-06 10:07:46 -0500
commit083858758f67bb20ef6be5bc8442be91cca8ee2d (patch)
treeb45bb4bda1a207678ccff684c5910c21bf85d897 /drivers/xen
parent96d4c5881806ebb993a3d84991af9c96fa9cd576 (diff)
downloadlinux-083858758f67bb20ef6be5bc8442be91cca8ee2d.tar.bz2
xen/events: add a evtchn_op for port setup
Add a hook for port-specific setup and call it from xen_irq_info_common_setup(). The FIFO-based ABIs may need to perform additional setup (expanding the event array) before a bound event channel can start to receive events. 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')
-rw-r--r--drivers/xen/events/events_base.c2
-rw-r--r--drivers/xen/events/events_internal.h12
2 files changed, 13 insertions, 1 deletions
diff --git a/drivers/xen/events/events_base.c b/drivers/xen/events/events_base.c
index 4f7d94abe82c..929eccb77270 100644
--- a/drivers/xen/events/events_base.c
+++ b/drivers/xen/events/events_base.c
@@ -117,7 +117,7 @@ static int xen_irq_info_common_setup(struct irq_info *info,
irq_clear_status_flags(irq, IRQ_NOREQUEST|IRQ_NOAUTOEN);
- return 0;
+ return xen_evtchn_port_setup(info);
}
static int xen_irq_info_evtchn_setup(unsigned irq,
diff --git a/drivers/xen/events/events_internal.h b/drivers/xen/events/events_internal.h
index ba8142f0c635..dc9650265e04 100644
--- a/drivers/xen/events/events_internal.h
+++ b/drivers/xen/events/events_internal.h
@@ -55,6 +55,7 @@ struct irq_info {
#define PIRQ_SHAREABLE (1 << 1)
struct evtchn_ops {
+ int (*setup)(struct irq_info *info);
void (*bind_to_cpu)(struct irq_info *info, unsigned cpu);
void (*clear_pending)(unsigned port);
@@ -75,6 +76,17 @@ struct irq_info *info_for_irq(unsigned irq);
unsigned cpu_from_irq(unsigned irq);
unsigned cpu_from_evtchn(unsigned int evtchn);
+/*
+ * Do any ABI specific setup for a bound event channel before it can
+ * be unmasked and used.
+ */
+static inline int xen_evtchn_port_setup(struct irq_info *info)
+{
+ if (evtchn_ops->setup)
+ return evtchn_ops->setup(info);
+ return 0;
+}
+
static inline void xen_evtchn_port_bind_to_cpu(struct irq_info *info,
unsigned cpu)
{