From 97253eeeb792d61ed22d397cfa236bd0311e4caf Mon Sep 17 00:00:00 2001 From: David Vrabel Date: Wed, 5 Feb 2014 14:13:10 +0000 Subject: xen/events: bind all new interdomain events to VCPU0 Commit fc087e10734a4d3e40693fc099461ec1270b3fff (xen/events: remove unnecessary init_evtchn_cpu_bindings()) causes a regression. The kernel-side VCPU binding was not being correctly set for newly allocated or bound interdomain events. In ARM guests where 2-level events were used, this would result in no interdomain events being handled because the kernel-side VCPU masks would all be clear. x86 guests would work because the irq affinity was set during irq setup and this would set the correct kernel-side VCPU binding. Fix this by properly initializing the kernel-side VCPU binding in bind_evtchn_to_irq(). Reported-and-tested-by: Julien Grall Signed-off-by: David Vrabel Signed-off-by: Konrad Rzeszutek Wilk --- drivers/xen/events/events_base.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/xen/events/events_base.c b/drivers/xen/events/events_base.c index 4672e003c0ad..f4a9e3311297 100644 --- a/drivers/xen/events/events_base.c +++ b/drivers/xen/events/events_base.c @@ -862,6 +862,8 @@ int bind_evtchn_to_irq(unsigned int evtchn) irq = ret; goto out; } + /* New interdomain events are bound to VCPU 0. */ + bind_evtchn_to_cpu(evtchn, 0); } else { struct irq_info *info = info_for_irq(irq); WARN_ON(info == NULL || info->type != IRQT_EVTCHN); -- cgit v1.2.3