What? Why?
For AMD the driver is difficult to find and poorly documented (and only available on ESXi unlike NVIDIA vGPU support for Xen, Hyper-V, KVM, Nutanix, and ESXi, etc.). At least the guest drivers don't have licensing issues unlike with NVIDIA IIUC.
(and good luck finding a remotely recent AMD GIM driver)
The end result is that it is unusable in practice. Very difficult and restricted to few CPUs/GPUs and very specific software chain.
Otherwise, it'd be open source, universally available and trivial to use.
The good news is that I understand this support is actually good on the Intel side, and Intel has promised that they will actually release competitive GPUs soon. Should this truly be the case, it will automatically make Intel the go-to for GPU virtualization, and might help motivate NVIDIA/AMD to stop segmenting re: GPU virtualization, ending this shitty situation.
It's because of this arbitrary restriction that Qubes is not able to provide GPU acceleration, which is a huge barrier to its adoption.
