Comment 9 for bug 1402959

https://blueprints.launchpad.net/horizon/+spec/sriov-support has been superseed.

Attaching ports to an instance on launch is not SR-IOV exclusive and actually has nothing to do with attaching ports or neutron or anything, its a configuration on nova + neutron which is left to the operator.

so first lets bring attaching ports to instance launch instead.
https://blueprints.launchpad.net/horizon/+spec/allow-launching-ports