From 2e820f58f7ad8eaca2f194ccdfea0de63e9c6d78 Mon Sep 17 00:00:00 2001
From: Ian Campbell <ian.campbell@citrix.com>
Date: Mon, 9 Feb 2009 12:05:50 -0800
Subject: [PATCH] xen/irq: implement bind_interdomain_evtchn_to_irqhandler for
backend drivers
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>
---
drivers/xen/events.c | 38 ++++++++++++++++++++++++++++++++++++++
include/xen/events.h | 6 ++++++
2 files changed, 44 insertions(+)
diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index 74681478100a..a41601675633 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -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)
diff --git a/include/xen/events.h b/include/xen/events.h
index 00f53ddcc062..bd03b1e4a2f4 100644
--- a/include/xen/events.h
+++ b/include/xen/events.h
@@ -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.