Wow! A Virtual GPU - very nice! I planned buying AMD RX480 and setting up GPU pass-through from Linux host to Windows guest for gaming. I didn’t know about KVMGT and this is great news! Currently only Intel GPUs are supported, but maybe AMD support will happen eventually. It would make sense with all the virtualization talk about upcoming Vega.
Here is a bit of an explanation: https://kernelnewbies.org/Linux_4.10#head-6b7d1bd2f7247da9c87798a91e10302b0cc32331
That document is a nice overview of the changes, better than the submitted link.