Hardware passthrough

How this is supposed to work is you pass in a device not being used by anyone\anything. This may require blacklisting drivers on the device.

In practice through it gets really flakey on consumer hardware. You may have to disable power management and resizable bar in some circumstances. The first because it can introduce transient errors on the passthrough if the implementation isn't correct (for consumer hardware...it probably is not) and the second because my understanding is the dynamic memory sizing on the card can cause issues with the virtualization process due to being read-only in the kernel. Unless this changes it's best to just disable it for now.

Overall assuming the iommu groups are solid. You can get a pretty decent idea of this by reviewing the motherboard block diagram before purchasing the board. Or finding someone who has confirmed it works.