diff options
Diffstat (limited to 'hw/virtio.c')
| -rw-r--r-- | hw/virtio.c | 27 |
1 files changed, 16 insertions, 11 deletions
diff --git a/hw/virtio.c b/hw/virtio.c index 849a60faaa..07dbf868fd 100644 --- a/hw/virtio.c +++ b/hw/virtio.c @@ -682,7 +682,6 @@ int virtio_load(VirtIODevice *vdev, QEMUFile *f) uint32_t features; uint32_t supported_features = vdev->binding->get_features(vdev->binding_opaque); - uint16_t num_heads; if (vdev->binding->load_config) { ret = vdev->binding->load_config(vdev->binding_opaque, f); @@ -713,17 +712,23 @@ int virtio_load(VirtIODevice *vdev, QEMUFile *f) qemu_get_be16s(f, &vdev->vq[i].last_avail_idx); if (vdev->vq[i].pa) { + uint16_t nheads; virtqueue_init(&vdev->vq[i]); - } - num_heads = vring_avail_idx(&vdev->vq[i]) - vdev->vq[i].last_avail_idx; - /* Check it isn't doing very strange things with descriptor numbers. */ - if (num_heads > vdev->vq[i].vring.num) { - error_report("VQ %d size 0x%x Guest index 0x%x " - "inconsistent with Host index 0x%x: delta 0x%x", - i, vdev->vq[i].vring.num, - vring_avail_idx(&vdev->vq[i]), - vdev->vq[i].last_avail_idx, num_heads); - return -1; + nheads = vring_avail_idx(&vdev->vq[i]) - vdev->vq[i].last_avail_idx; + /* Check it isn't doing very strange things with descriptor numbers. */ + if (nheads > vdev->vq[i].vring.num) { + error_report("VQ %d size 0x%x Guest index 0x%x " + "inconsistent with Host index 0x%x: delta 0x%x\n", + i, vdev->vq[i].vring.num, + vring_avail_idx(&vdev->vq[i]), + vdev->vq[i].last_avail_idx, nheads); + return -1; + } + } else if (vdev->vq[i].last_avail_idx) { + error_report("VQ %d address 0x0 " + "inconsistent with Host index 0x%x\n", + i, vdev->vq[i].last_avail_idx); + return -1; } if (vdev->binding->load_queue) { ret = vdev->binding->load_queue(vdev->binding_opaque, i, f); |