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virtio: avoid using guest_notifier_mask in vhost-user mode 

Because guest mask notifier cannot be used in vhost-user mode, a boolean
flag "use_guest_notifier_mask" was added in commit 5669655aaf to disable
the use of guest mask notifier under virtio-pci. However this flag wasn't
checked in other virtio devices, such as virtio-mmio. In our tests, it
caused assertion error under "vhost-user + virtio-mmio". This patch
addresses this problem by adding a check before guest_notifier_mask is
called.

Signed-off-by: Wei Huang <wei@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Wei Huang 2016-12-15 12:23:24 -06:00 committed by Michael S. Tsirkin
parent d93ddfb1f8
commit 2858bc6870
2 changed files with 3 additions and 3 deletions
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4
hw/s390x/virtio-ccw.c
View File

@ -1098,7 +1098,7 @@ static int virtio_ccw_set_guest_notifier(VirtioCcwDevice *dev, int n,
* We do not support individual masking for channel devices, so we
* need to manually trigger any guest masking callbacks here.
*/
if (k->guest_notifier_mask) {
if (k->guest_notifier_mask && vdev->use_guest_notifier_mask) {
k->guest_notifier_mask(vdev, n, false);
}
/* get lost events and re-inject */
@ -1107,7 +1107,7 @@ static int virtio_ccw_set_guest_notifier(VirtioCcwDevice *dev, int n,
event_notifier_set(notifier);
}
} else {
if (k->guest_notifier_mask) {
if (k->guest_notifier_mask && vdev->use_guest_notifier_mask) {
k->guest_notifier_mask(vdev, n, true);
}
if (with_irqfd) {

2
hw/virtio/virtio-mmio.c
View File

@ -402,7 +402,7 @@ static int virtio_mmio_set_guest_notifier(DeviceState *d, int n, bool assign,
event_notifier_cleanup(notifier);
}
if (vdc->guest_notifier_mask) {
if (vdc->guest_notifier_mask && vdev->use_guest_notifier_mask) {
vdc->guest_notifier_mask(vdev, n, !assign);
}