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| author | Wei Huang <wei@redhat.com> | 2016-12-15 12:23:24 -0600 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2016-12-16 01:14:54 +0200 |
| commit | 2858bc68701e282c404ed04d65d4f065e4b40e52 (patch) | |
| tree | c7d967dcd199fbba02732bbec5a396815afda206 /hw/s390x | |
| parent | d93ddfb1f8fb72a7c175a8cf1028c639f769d105 (diff) | |
| download | qemu-2858bc68701e282c404ed04d65d4f065e4b40e52.zip qemu-2858bc68701e282c404ed04d65d4f065e4b40e52.tar.gz qemu-2858bc68701e282c404ed04d65d4f065e4b40e52.tar.bz2 | |
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 5669655aafd 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>
Diffstat (limited to 'hw/s390x')
| -rw-r--r-- | hw/s390x/virtio-ccw.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c index f5c1d98..0765068 100644 --- a/hw/s390x/virtio-ccw.c +++ b/hw/s390x/virtio-ccw.c @@ -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) { |