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xen/irq: implement bind_interdomain_evtchn_to_irqhandler for backend drivers

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Impact: new Xen-internal API

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Ian Campbell 2009-02-09 12:05:50 -08:00 committed by Konrad Rzeszutek Wilk
parent 1bae4ce27c
commit 2e820f58f7
2 changed files with 44 additions and 0 deletions
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38
drivers/xen/events.c
View File

@ -864,6 +864,21 @@ static int bind_ipi_to_irq(unsigned int ipi, unsigned int cpu)
return irq; 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) 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); 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, int bind_virq_to_irqhandler(unsigned int virq, unsigned int cpu,
irq_handler_t handler, irq_handler_t handler,
unsigned long irqflags, const char *devname, void *dev_id) unsigned long irqflags, const char *devname, void *dev_id)

6
include/xen/events.h
View File

@ -23,6 +23,12 @@ int bind_ipi_to_irqhandler(enum ipi_vector ipi,
unsigned long irqflags, unsigned long irqflags,
const char *devname, const char *devname,
void *dev_id); 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. * Common unbind function for all event sources. Takes IRQ to unbind from.