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arm-devs queue

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Merge remote-tracking branch 'pmaydell/tags/pull-arm-devs-20130812' into staging

arm-devs queue

# gpg: Signature made Mon 12 Aug 2013 05:58:14 AM CDT using RSA key ID 14360CDE
# gpg: Can't check signature: public key not found

# By Peter Maydell
# Via Peter Maydell
* pmaydell/tags/pull-arm-devs-20130812:
  hw/virtio/virtio-mmio: Make QueueNumMax read 0 for unavailable queues
  hw/virtio/virtio: Don't allow guests to add/remove queues

Message-id: 1376305261-29561-1-git-send-email-peter.maydell@linaro.org
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Anthony Liguori 2013-08-12 08:32:43 -05:00
commit 6624fecd8e
2 changed files with 12 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
hw/virtio/virtio-mmio.c
View file

@ -151,6 +151,9 @@ static uint64_t virtio_mmio_read(void *opaque, hwaddr offset, unsigned size)
}
return proxy->host_features;
case VIRTIO_MMIO_QUEUENUMMAX:
if (!virtio_queue_get_num(vdev, vdev->queue_sel)) {
return 0;
}
return VIRTQUEUE_MAX_SIZE;
case VIRTIO_MMIO_QUEUEPFN:
return virtio_queue_get_addr(vdev, vdev->queue_sel)

12
hw/virtio/virtio.c
View file

@ -673,10 +673,16 @@ hwaddr virtio_queue_get_addr(VirtIODevice *vdev, int n)
void virtio_queue_set_num(VirtIODevice *vdev, int n, int num)
{
if (num <= VIRTQUEUE_MAX_SIZE) {
vdev->vq[n].vring.num = num;
virtqueue_init(&vdev->vq[n]);
/* Don't allow guest to flip queue between existent and
* nonexistent states, or to set it to an invalid size.
*/
if (!!num != !!vdev->vq[n].vring.num ||
num > VIRTQUEUE_MAX_SIZE ||
num < 0) {
return;
}
vdev->vq[n].vring.num = num;
virtqueue_init(&vdev->vq[n]);
}
int virtio_queue_get_num(VirtIODevice *vdev, int n)