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virtio: Fix no interrupt when not creating msi controller 

For ARM virt machine, if we use virt-2.7 which will not create ITS node,
the virtio-net can not recieve interrupts so it can't get ip address
through dhcp.
This fixes commit 83d768b(virtio: set ISR on dataplane notifications).

Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Michael S. Tsirkin 2017-02-17 04:52:16 +02:00
parent 97cd965c07
commit b4b9862b53
1 changed files with 8 additions and 3 deletions
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11
hw/virtio/virtio.c
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@ -1584,6 +1584,12 @@ void virtio_notify_irqfd(VirtIODevice *vdev, VirtQueue *vq)
event_notifier_set(&vq->guest_notifier);
}
static void virtio_irq(VirtQueue *vq)
{
virtio_set_isr(vq->vdev, 0x1);
virtio_notify_vector(vq->vdev, vq->vector);
}
void virtio_notify(VirtIODevice *vdev, VirtQueue *vq)
{
bool should_notify;
@ -1596,8 +1602,7 @@ void virtio_notify(VirtIODevice *vdev, VirtQueue *vq)
}
trace_virtio_notify(vdev, vq);
virtio_set_isr(vq->vdev, 0x1);
virtio_notify_vector(vdev, vq->vector);
virtio_irq(vq);
}
void virtio_notify_config(VirtIODevice *vdev)
@ -2240,7 +2245,7 @@ static void virtio_queue_guest_notifier_read(EventNotifier *n)
{
VirtQueue *vq = container_of(n, VirtQueue, guest_notifier);
if (event_notifier_test_and_clear(n)) {
virtio_notify_vector(vq->vdev, vq->vector);
virtio_irq(vq);
}
}