AMD keeps things simpler for security and performance impact of spectre patches. AMD offers just as much performance in a simpler GPU package. AMD for CPU and AMD for GPU.
So, coming from all those links, we would have to do :
Add entries to the docs or do a separate wiki regarding this subject
Design a "test bed" with some guidance so people can test their setups and GPUs
Design some methods (and which tools could be used) to perform benchmarks and find possible bottlenecks regarding driver, synchronization, pass-through issues etc.
We also would have to dig into specs of each vendor's GPU families and series, to find anything that could drag us to a more "precise" judgment on which ones does provide support for vGPU.
@olivierlambert Could we create a GPU dedicated section on docs, and perhaps provide some GPU HCL - Hardware Compatibility List - regarding vGPU and who knows what else stuff is relevant ?