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Commit 2e820f58 authored by Ian Campbell's avatar Ian Campbell Committed by Konrad Rzeszutek Wilk
Browse files

xen/irq: implement bind_interdomain_evtchn_to_irqhandler for backend drivers 



Impact: new Xen-internal API

Signed-off-by: default avatarIan Campbell <ian.campbell@citrix.com>
Signed-off-by: default avatarJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
parent 1bae4ce2

drivers/xen/events.c

+38 −0
Original line number Diff line number Diff line
@@ -864,6 +864,21 @@ static int bind_ipi_to_irq(unsigned int ipi, unsigned int cpu) 
	return irq;

}



static int bind_interdomain_evtchn_to_irq(unsigned int remote_domain,

					  unsigned int remote_port)

{

	struct evtchn_bind_interdomain bind_interdomain;

	int err;



	bind_interdomain.remote_dom  = remote_domain;

	bind_interdomain.remote_port = remote_port;



	err = HYPERVISOR_event_channel_op(EVTCHNOP_bind_interdomain,

					  &bind_interdomain);



	return err ? : bind_evtchn_to_irq(bind_interdomain.local_port);

}





int bind_virq_to_irq(unsigned int virq, unsigned int cpu)

{
@@ -959,6 +974,29 @@ int bind_evtchn_to_irqhandler(unsigned int evtchn, 
}

EXPORT_SYMBOL_GPL(bind_evtchn_to_irqhandler);



int bind_interdomain_evtchn_to_irqhandler(unsigned int remote_domain,

					  unsigned int remote_port,

					  irq_handler_t handler,

					  unsigned long irqflags,

					  const char *devname,

					  void *dev_id)

{

	int irq, retval;



	irq = bind_interdomain_evtchn_to_irq(remote_domain, remote_port);

	if (irq < 0)

		return irq;



	retval = request_irq(irq, handler, irqflags, devname, dev_id);

	if (retval != 0) {

		unbind_from_irq(irq);

		return retval;

	}



	return irq;

}

EXPORT_SYMBOL_GPL(bind_interdomain_evtchn_to_irqhandler);



int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu,

			    irq_handler_t handler,

			    unsigned long irqflags, const char *devname, void *dev_id)

include/xen/events.h

+6 −0
Original line number Diff line number Diff line
@@ -23,6 +23,12 @@ int bind_ipi_to_irqhandler(enum ipi_vector ipi, 
			   unsigned long irqflags,

			   const char *devname,

			   void *dev_id);

int bind_interdomain_evtchn_to_irqhandler(unsigned int remote_domain,

					  unsigned int remote_port,

					  irq_handler_t handler,

					  unsigned long irqflags,

					  const char *devname,

					  void *dev_id);



/*

 * Common unbind function for all event sources. Takes IRQ to unbind from.