On Tue, Dec 02, 2014 at 04:41:36PM +0100, Cornelia Huck wrote:
> void virtio_queue_set_num(VirtIODevice *vdev, int n, int num)
> {
> + /*
> + * For virtio-1 devices, the number of buffers may only be
> + * updated if the ring addresses have not yet been set up.
Where does it say that?
> + */
> + if (virtio_has_feature(vdev, VIRTIO_F_VERSION_1) &&
> + vdev->vq[n].vring.desc) {
> + error_report("tried to modify buffer num for virtio-1 device");
> + return;
> + }
> /* Don't allow guest to flip queue between existent and
> * nonexistent states, or to set it to an invalid size.
> */
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