Trying to get virgl working from linux host to windows guest

in virt-manager i have added the host graphics card Matrox G200ew to the hardware settings as a pci device for Windows 10 guest.

When i go to spice server settings, and select Opengl checked there are no available pci devices listed in  the drop down box select.

Am trying to get some 3d working on Windows guest and seems from reading this is almost impossible short of doing gpu passthrough with a second GPU in the host.
Am probably missing something.

Thank You.