How are you sharing your GPU with multiple VMs?

HyperV has GPU para virtualization

But for qemu,kvm,xen it seems like the best option is to passthrough a GPU to a single VM, unless the GPU supports srvio, which almost all of the retail cards don't.

I head about the woof and gaming on whales project, and they seem to get around this by using only containers for the subdivision.

What methods or options have you used to share a GPU with your VMs?