virtio: support reserved vqs
authorMichael S. Tsirkin <mst@redhat.com>
Wed, 5 Sep 2012 18:47:45 +0000 (21:47 +0300)
committerRusty Russell <rusty@rustcorp.com.au>
Fri, 28 Sep 2012 05:35:15 +0000 (14:35 +0930)
commit6457f126c888b3481fdae6f702e616cd0c79646e
treeeae794db0b3983d2a901ecf6471eda6e3f9ff26f
parent75a0a52be3c27b58654fbed2c8f2ff401482b9a4
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>
drivers/lguest/lguest_device.c
drivers/remoteproc/remoteproc_virtio.c
drivers/s390/kvm/kvm_virtio.c
drivers/virtio/virtio_mmio.c
drivers/virtio/virtio_pci.c
include/linux/virtio_config.h