Is the Enhanced Networking on a C4 instance a Virtual Function (ixgbev driver) or a full Physical Function (ixgbe driver)?

The docs say that it is a VF but I wonder since they are offering the full 10G of bandwidth.

We could relocate our Snabb Lab to AWS if we got PFs. https://github.com/SnabbCo/snabbswitch/wiki/Snabb-Lab