Commit b4b9862b authored by Michael S. Tsirkin's avatar Michael S. Tsirkin
Browse files

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 83d768b5(virtio: set ISR on dataplane notifications).

Signed-off-by: default avatarShannon Zhao <shannon.zhao@linaro.org>
Reviewed-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent 97cd965c

hw/virtio/virtio.c

+8 −3
Original line number Diff line number Diff line
@@ -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);

    }

}