On 09/18/2015 08:58 AM, Yuanhan Liu wrote: > From: Changchun Ouyang <changchun.ouy...@intel.com> > > Add a new message, VHOST_USER_SET_VRING_ENABLE, to enable or disable > a specific virt queue, which is similar to attach/detach queue for > tap device. > > virtio driver on guest doesn't have to use max virt queue pair, it > could enable any number of virt queue ranging from 1 to max virt > queue pair. > > Signed-off-by: Changchun Ouyang <changchun.ouy...@intel.com> > Signed-off-by: Yuanhan Liu <yuanhan....@linux.intel.com> > --- > docs/specs/vhost-user.txt | 12 +++++++++++- > hw/net/vhost_net.c | 18 ++++++++++++++++++ > hw/net/virtio-net.c | 8 ++++++++ > hw/virtio/vhost-user.c | 19 +++++++++++++++++++ > include/hw/virtio/vhost-backend.h | 2 ++ > include/net/vhost_net.h | 2 ++ > 6 files changed, 60 insertions(+), 1 deletion(-) > > diff --git a/docs/specs/vhost-user.txt b/docs/specs/vhost-user.txt > index cfc9d41..a5f1c31 100644 > --- a/docs/specs/vhost-user.txt > +++ b/docs/specs/vhost-user.txt > @@ -148,7 +148,9 @@ VHOST_USER_GET_PROTOCOL_FEATURES. Master should stop when > the number of > requested queues is bigger than that. > > As all queues share one connection, the master uses a unique index for each > -queue in the sent message to identify a specified queue. > +queue in the sent message to identify a specified queue. One queue pairs
s/pairs/pair/ > +is enabled initially. More queues are enabled dynamically, by sending > +message VHOST_USER_SET_VRING_ENABLE. > > Message types > ------------- > @@ -327,3 +329,11 @@ Message types > Query how many queues the backend supports. This request should be > sent only when VHOST_USER_PROTOCOL_F_MQ is set in quried protocol > features by VHOST_USER_GET_PROTOCOL_FEATURES. > + > + * VHOST_USER_SET_VRING_ENABLE > + > + Id: 18 > + Equivalent ioctl: N/A > + Master payload: vring state description > + > + Signal slave to enable or disable corresponding vring. Does there need to be any QMP control to manually change a given queue, or is it all used under the hood with no need for management apps to care other than their initial request of max queues? -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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