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xen/events: bind all new interdomain events to VCPU0

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Commit fc087e1073 (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>
This commit is contained in:
David Vrabel 2014-02-05 14:13:10 +00:00 committed by Konrad Rzeszutek Wilk
parent afca50132c
commit 97253eeeb7
1 changed files with 2 additions and 0 deletions
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2
drivers/xen/events/events_base.c
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@ -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);