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Commit 08385875 authored by David Vrabel's avatar David Vrabel Committed by Konrad Rzeszutek Wilk
Browse files

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: default avatarDavid Vrabel <david.vrabel@citrix.com>
Reviewed-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: default avatarBoris Ostrovsky <boris.ostrovsky@oracle.com>
parent 96d4c588

drivers/xen/events/events_base.c

+1 −1
Original line number Diff line number Diff line
@@ -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,

drivers/xen/events/events_internal.h

+12 −0
Original line number Diff line number Diff line
@@ -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)

{