A curiosity here...
I've got two (identical) hosts in a pool (2nd Gen Epyc).
Host 1 has an NVidia Tesla P4 GPU passed-through to a VM.
Host 2 has an Intel B50 Pro GPU passed-through to a VM.
I've been attempting to get the Intel GPU running properly in a VM.
The NVidia GPU is PCIe Gen3 x16.
The Intel should be PCIe Gen5 x8, but should not have any issues running at PCIe Gen4 x8.
The NVidia GPU shows up as PCIe Gen3 x16 lanes.
The Intel GPU shows up as PCIe Gen1 x1 lane (and as such does not work).
What determines how many of what generation PCIe lanes gets passed through? Is XCP-ng just not sorting out the Intel GPU properly?
I'm pretty sure the BIOS settings are the same between the two hosts, but I'll see about doing a full comparison between the two.
Thanks!
James
