diff options
| author | Michael S. Tsirkin <mst@redhat.com> | 2012-09-05 21:47:45 +0300 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2012-09-28 15:05:15 +0930 |
| commit | 6457f126c888b3481fdae6f702e616cd0c79646e (patch) | |
| tree | eae794db0b3983d2a901ecf6471eda6e3f9ff26f /include/linux | |
| parent | 75a0a52be3c27b58654fbed2c8f2ff401482b9a4 (diff) | |
virtio: support reserved vqs
virtio network device multiqueue support reserves
vq 3 for future use (useful both for future extensions and to make it
pretty - this way receive vqs have even and transmit - odd numbers).
Make it possible to skip initialization for
specific vq numbers by specifying NULL for name.
Document this usage as well as (existing) NULL callback.
Drivers using this not coded up yet, so I simply tested
with virtio-pci and verified that this patch does
not break existing drivers.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/virtio_config.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h index 2c4a9895379d..e2850a7ea276 100644 --- a/include/linux/virtio_config.h +++ b/include/linux/virtio_config.h @@ -84,7 +84,9 @@ * nvqs: the number of virtqueues to find * vqs: on success, includes new virtqueues * callbacks: array of callbacks, for each virtqueue + * include a NULL entry for vqs that do not need a callback * names: array of virtqueue names (mainly for debugging) + * include a NULL entry for vqs unused by driver * Returns 0 on success or error status * @del_vqs: free virtqueues found by find_vqs(). * @get_features: get the array of feature bits for this device. |