VM iGPU Passthrough

Setting Up

This guide seems to work for Strix Halo:
https://github.com/isc30/ryzen-gpu-passthrough-proxmox

This is mostly tied to Proxmox, but should still be applicable to regular systems with KVM installed.

Configuration

# /etc/kernel/cmdline
... iommu=pt initcall_blacklist=sysfb_init

# /etc/modules
vfio
vfio_iommu_type1
vfio_pci

# /etc/modprobe.d/blacklist.conf
blacklist radeon
blacklist amdgpu
blacklist snd_hda_intel

# /etc/modprobe.d/vfio.conf
options vfio-pci ids=1002:1586,1002:1640 disable_vga=1

# vm.conf for QEMU
# don't forget to replace the IDs
hostpci0: 0000:c6:00.0,pcie=1,romfile=vbios_8060s.bin,x-vga=1
hostpci1: 0000:c6:00.1,pcie=1,romfile=AMDGopDriver.rom

Notes

hardware IDs are 1002:1586 (iGPU) and 1002:1640 (audio)
the 'reset bug' is here, I found no way to avoid it
set the fixed VRAM amount in the BIOS and never change it on the OS level, otherwise expect major slowdowns and crashes
this issue might be worth looking into

Files

(taken from EVO-X2, BIOS version 1.04)