[vfio-users] AMD RX 580 - Code 43 device manager error on Win7/Win10 guests

[Taiidan at gmx.com]

Board: KGPE-D16 running coreboot. (these run CPU's similar to the FX series)

While I receive video output from the guest no matter what I do 2d/3d
acceleration won't enable.

I see nothing in host dmesg about this (no BAR issues or what not) - but
the one thing I noticed is that the device doesn't bind to vfio at boot
despite the addition of the device ids to the kernel command line.

Ideas?