[vfio-users] VFIO PCI-E redirection hardlock

[Aaron Lancaster]

I am attempting to do PCI redirection with KVM on a GA-F2A88XM-D3H motherboard.

I can redirect every other device/slot on the system except the PCI-E
x16 slot that contains the card the UEFI/BIOS displays on.

If I attempt to redirect a card in this slot I immediately get a full
system freeze where nothing responds. I have two PCI-E graphics cards,
and this happens with both of them, and both of them can be redirected
without issue when placed into the secondary PCI-E 4x slot.

I have ensured that vfio-pci is bound to the PCI device after boot
(via initrd), and that everything in the iommu group is being
redirected.

Anything i may have missed, or some tips?