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| author | Peter Maydell <peter.maydell@linaro.org> | 2016-08-24 17:21:03 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2016-08-24 17:21:03 +0100 |
| commit | e00da552a0dc82f4ec7896281eada7201e69f1db (patch) | |
| tree | 08ef6f981599137aca48b19c4204804335cd6722 /hw | |
| parent | 8c1c230a6e941a2b2c014fed0dc5db08694480d8 (diff) | |
| parent | 58a83c61496eeb0d31571a07a51bc1947e3379ac (diff) | |
| download | qemu-e00da552a0dc82f4ec7896281eada7201e69f1db.tar.gz | |
Merge remote-tracking branch 'remotes/mst/tags/for_upstream' into staging
virtio: fixes
some bugfixes for virtio
balloon is still broken wrt migration
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
# gpg: Signature made Tue 23 Aug 2016 17:33:11 BST
# gpg: using RSA key 0x281F0DB8D28D5469
# gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>"
# gpg: aka "Michael S. Tsirkin <mst@redhat.com>"
# Primary key fingerprint: 0270 606B 6F3C DF3D 0B17 0970 C350 3912 AFBE 8E67
# Subkey fingerprint: 5D09 FD08 71C8 F85B 94CA 8A0D 281F 0DB8 D28D 5469
* remotes/mst/tags/for_upstream:
virtio: decrement vq->inuse in virtqueue_discard()
virtio: recalculate vq->inuse after migration
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/virtio/virtio.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index 15ee3a71fa..74c085c74d 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -268,6 +268,7 @@ void virtqueue_discard(VirtQueue *vq, const VirtQueueElement *elem, unsigned int len) { vq->last_avail_idx--; + vq->inuse--; virtqueue_unmap_sg(vq, elem, len); } @@ -1648,6 +1649,21 @@ int virtio_load(VirtIODevice *vdev, QEMUFile *f, int version_id) } vdev->vq[i].used_idx = vring_used_idx(&vdev->vq[i]); vdev->vq[i].shadow_avail_idx = vring_avail_idx(&vdev->vq[i]); + + /* + * Some devices migrate VirtQueueElements that have been popped + * from the avail ring but not yet returned to the used ring. + */ + vdev->vq[i].inuse = vdev->vq[i].last_avail_idx - + vdev->vq[i].used_idx; + if (vdev->vq[i].inuse > vdev->vq[i].vring.num) { + error_report("VQ %d size 0x%x < last_avail_idx 0x%x - " + "used_idx 0x%x", + i, vdev->vq[i].vring.num, + vdev->vq[i].last_avail_idx, + vdev->vq[i].used_idx); + return -1; + } } } |