Easy ACS kernel patch guide for Ubuntu 20.04

In this video, we will be installing an ACS patched kernel in Ubuntu 20.04.

Download the kernel from here: https://queuecumber.gitlab.io/linux-acs-override/

Copy the echo statements from here and use them when editing initramfs: https://github.com/pavolelsig/passthrough_helper_ubuntu/blob/master/tail.sh

Enter this into grub: pcie_acs_override=downstream

If that does not help use:
pcie_acs_override=downstream,multifunction

Download IOMMU viewer here: https://github.com/pavolelsig/IOMMU-viewer

For background information about IOMMU groups: https://vfio.blogspot.com/2014/08/iommu-groups-inside-and-out.html

GPU passthrough guide for Ubuntu 20.04: https://www.youtube.com/watch?v=tDMoEvf8Q18

Don’t forget to boot into the ACS kernel!!!

source

ubuntu 20.04