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authorDavid Vrabel <david.vrabel@citrix.com>2014-02-05 18:13:10 +0400
committerKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2014-02-11 19:12:34 +0400
commit97253eeeb792d61ed22d397cfa236bd0311e4caf (patch)
tree02bf0848fd9f09366adcda001c024042baded341 /drivers/xen
parentafca50132cfa7bfc5646676d8c67dc18454f38f8 (diff)
downloadlinux-97253eeeb792d61ed22d397cfa236bd0311e4caf.tar.xz
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 <julien.grall@linaro.org> Signed-off-by: David Vrabel <david.vrabel@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'drivers/xen')
-rw-r--r--drivers/xen/events/events_base.c2
1 files changed, 2 insertions, 0 deletions
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);