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authorIsaku Yamahata <yamahata@valinux.co.jp>2008-04-02 10:53:57 -0700
committerIngo Molnar <mingo@elte.hu>2008-04-24 23:57:32 +0200
commit642e0c882cd5369429c833d97e4804c8be473e8a (patch)
treec9032832801bd68379b30983ce61fd80f823adb0
parentXen: make events.c portable for ia64/xen support (diff)
downloadlinux-dev-642e0c882cd5369429c833d97e4804c8be473e8a.tar.xz
linux-dev-642e0c882cd5369429c833d97e4804c8be473e8a.zip
xen: add resend_irq_on_evtchn() definition into events.c
Define resend_irq_on_evtchn() which ia64/xen uses. Although it isn't used by current x86/xen code, it's arch generic so that put it into common code. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
-rw-r--r--drivers/xen/events.c16
-rw-r--r--include/xen/events.h1
2 files changed, 17 insertions, 0 deletions
diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index 2396b4492f70..4f0f22b020ea 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -586,6 +586,22 @@ static void set_affinity_irq(unsigned irq, cpumask_t dest)
rebind_irq_to_cpu(irq, tcpu);
}
+int resend_irq_on_evtchn(unsigned int irq)
+{
+ int masked, evtchn = evtchn_from_irq(irq);
+ struct shared_info *s = HYPERVISOR_shared_info;
+
+ if (!VALID_EVTCHN(evtchn))
+ return 1;
+
+ masked = sync_test_and_set_bit(evtchn, s->evtchn_mask);
+ sync_set_bit(evtchn, s->evtchn_pending);
+ if (!masked)
+ unmask_evtchn(evtchn);
+
+ return 1;
+}
+
static void enable_dynirq(unsigned int irq)
{
int evtchn = evtchn_from_irq(irq);
diff --git a/include/xen/events.h b/include/xen/events.h
index d99a3e0df880..acd8e062c85f 100644
--- a/include/xen/events.h
+++ b/include/xen/events.h
@@ -31,6 +31,7 @@ int bind_ipi_to_irqhandler(enum ipi_vector ipi,
void unbind_from_irqhandler(unsigned int irq, void *dev_id);
void xen_send_IPI_one(unsigned int cpu, enum ipi_vector vector);
+int resend_irq_on_evtchn(unsigned int irq);
static inline void notify_remote_via_evtchn(int port)
{