diff options
| author | David Vrabel <david.vrabel@citrix.com> | 2013-03-18 17:54:57 +0100 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2014-01-06 16:07:46 +0100 |
| commit | 083858758f67bb20ef6be5bc8442be91cca8ee2d (patch) | |
| tree | b45bb4bda1a207678ccff684c5910c21bf85d897 | |
| parent | xen/events: allow setup of irq_info to fail (diff) | |
| download | linux-083858758f67bb20ef6be5bc8442be91cca8ee2d.tar.xz linux-083858758f67bb20ef6be5bc8442be91cca8ee2d.zip | |
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>
| -rw-r--r-- | drivers/xen/events/events_base.c | 2 | ||||
| -rw-r--r-- | drivers/xen/events/events_internal.h | 12 |
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) { |