tree 1157d5803702f242d4b35268644ee48e20719307
parent b28e0506fafd9c987bba7a6a71ea02a37fcabdea
author Michael S. Tsirkin <mst@redhat.com> 1419116423 +0200
committer Michael S. Tsirkin <mst@redhat.com> 1419843306 +0200

vhost: relax used address alignment

virtio 1.0 only requires used address to be 4 byte aligned,
vhost required 8 bytes (size of vring_used_elem).
Fix up vhost to match that.

Additionally, while vhost correctly requires 8 byte
alignment for log, it's unconnected to used ring:
it's a consequence that log has u64 entries.
Tweak code to make that clearer.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>