AMD iGPU passthrough won't work

jonsley said:
UPDATE I got it working on Windows and Ubuntu. Please check the end of this thread for how.

A

Thread 'Warning: UPDATING these packages broke my pci passthrough.'

I installed updates

libpve-common-perl/stable 8.2.6 all [upgradable from: 8.2.5]
pve-firmware/stable,stable 3.14-1 all [upgradable from: 3.13-3]
qemu-server/stable 8.2.5 amd64 [upgradable from: 8.2.4]

After doing this i was getting a task error saying cannot bind <pci-device> to vfio

Because my router is a vm with a pass through network card it screwed me. I had to bring out backup router and down grade all of these packages and then pass through was immediately restored.

I just wanted to post this to warn everyone and also let the devs know there is an issue with these packages.

I...

basically even new AMD CPUs still require setting up all the kernel parameters to split up each device into its own iommugroup! Yes!
Click to expand...
Now I am in need of advice :)

Can you please refresh my memory on what kernel params to use to break up IOMMU to it's maximum.

I am running into issues with AMD / Asrock rack at the moment. But before I start shaming asrock rack I first need to keep experimenting with kernel params and also update to the latest BIOS.
 
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