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| author |   Michael S. Tsirkin <mst@redhat.com> | 2014-10-23 18:07:47 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2014-12-09 12:05:26 +0200 |
| commit | b3bb62d11950eb6ac87403cacd667f84fa9495bc (patch) | |
| tree | f3aee72f5e622722d19c484c7f5925990e97cffb /include/linux/virtio.h | |
| parent | virtio: simplify feature bit handling (diff) | |
| download | wireguard-linux-b3bb62d11950eb6ac87403cacd667f84fa9495bc.tar.xz wireguard-linux-b3bb62d11950eb6ac87403cacd667f84fa9495bc.zip | |
virtio: add legacy feature table support
virtio-blk has some legacy feature bits that modern drivers
must not negotiate, but are needed for old legacy hosts
(that e.g. don't support virtio-scsi).
Allow a separate legacy feature table for such cases.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Diffstat (limited to 'include/linux/virtio.h')
| -rw-r--r-- | include/linux/virtio.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/virtio.h b/include/linux/virtio.h index d6359a5d5d4e..f70411eb9d27 100644 --- a/include/linux/virtio.h +++ b/include/linux/virtio.h @@ -130,6 +130,8 @@ int virtio_device_restore(struct virtio_device *dev); * @id_table: the ids serviced by this driver. * @feature_table: an array of feature numbers supported by this driver. * @feature_table_size: number of entries in the feature table array. + * @feature_table_legacy: same as feature_table but when working in legacy mode. + * @feature_table_size_legacy: number of entries in feature table legacy array. * @probe: the function to call when a device is found. Returns 0 or -errno. * @remove: the function to call when a device is removed. * @config_changed: optional function to call when the device configuration @@ -140,6 +142,8 @@ struct virtio_driver { const struct virtio_device_id *id_table; const unsigned int *feature_table; unsigned int feature_table_size; + const unsigned int *feature_table_legacy; + unsigned int feature_table_size_legacy; int (*probe)(struct virtio_device *dev); void (*scan)(struct virtio_device *dev); void (*remove)(struct virtio_device *dev); |