Thanks for working on this :) I haven't had a chance to look at theuefi wrapper in detail yet, but overall it looks reasonable. Could you split the uefi-raw part out to a separate PR? That should be straightforward to review and merge in isolation.

Is this ready for review? Currently it's marked as draft still. (No worries if that's intentional, just want to be sure you're not waiting on review.)

I still need to write some test for it. I have been busy with some other things, so I'll send those over as soon as I can. Feel free to take a look if you want.

@nicholasbishop I am trying to write some test for this, but I cant seem to get a protocol handle. I went into the uefi shell of the qemu vm, and the IoMmu driver image is present:

dh -p 4e939de9-d948-4b0f-88ed-e6e1ce517c1e -vHandle dump by protocol'4E939DE9-D948-4B0F-88ED-E6E1CE517C1E'Shell> dh -p 03c4e603-ac28-11d3-9a2d-0090273fc14d -vHandle dump by protocol'PXEBaseCode'Shell> dh 28 -v28: 3ECF0C18ImageDevicePath(3ECF2A98)  Fv(7CB8BDC9-F8EB-4F34-AAEA-3EE4AF6516A1)/FvFile(8657015B-EA43-440D-949A-AF3BE365C0FC)LoadedImage(3ECF20C0)  Name..........: IoMmuDxe

So I am assuming the driver is failing to find hardware. I have tried a few different things, different EDK2 builds and followed the virtio instructionshere, but nothing has worked. Ik it worked on hardware, so if you have any ideas on how to get qemu setup for IoMmu please let me know.

So I am assuming the driver is failing to find hardware. I have tried a few different things, different EDK2 builds and followed the virtio instructionshere, but nothing has worked.

Thanks for trying to find a solution! Is there any update here? Have you tried to add an IOMMU to the QEMU VM? Perhaps one is needed so that the protocol will be installed one some handles (-device intel-iommu)?