Commit 97253eee authored Feb 05, 2014 by David Vrabel Committed by Konrad Rzeszutek Wilk Feb 11, 2014

xen/events: bind all new interdomain events to VCPU0



Commit fc087e10 (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 <julien.grall@linaro.org>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

parent afca5013

drivers/xen/events/events_base.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -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);