The VFIO blog was the best resource I found. Start at the first article (http://vfio.blogspot.com/2015/05/vfio-gpu-how-to-series-part...) in the how to series, work through that, and then read all the other posts on there. It's also helpful to use https://wiki.archlinux.org/index.php/PCI_passthrough_via_OVM... , as that covers some of the things that the VFIO blog glosses over and it's a little more up-to-date. This is all bleeding edge stuff. For example, VFIO broke in a recent Linux kernel and only got fixed and released in Arch's repos a few days before I started my installation :P

Agreed, this the same info I followed to get Elite Dangerous working in a Windows VM on a Ubuntu host. Feels very nice to have Windows not as the root of a machine.