single-amd-gpu-passthrough

Simple, single amd gpu passthrough on intel platform.

We will be using some of the components from risingprismtv/single-gpu-passthrough guide; however, simplified it for plasma-wayland

Prerequisite

• OS : arch linux
• Knl: 6.6+
• DE : plasma-wayland (only)
• DM : sddm
• dGPU: rdna2
• CPU: intel
• VT-d and VT-x capable motherboard

Part -1 : Motherboard Bios

1. Enable VT-d and VT-x in your motherboards BIOS
2. Disable REBAR and 4G Decode
3. Disable CSM

Part -2 : Bootloader and IOMMU

1. Add the following parameters to your bootloader: intel_iommu=on iommu=pt
2. Restart
3. Follow the guide: https://gitlab.com/risingprismtv/single-gpu-passthrough/-/wikis/3)-IOMMU-Groups

Note down the Bus ID for GPU:

  -VGA      (example) 03:00.0 
  -AUDIO    (example) 03:00.1 

Part -3 : Libvirt and Qemu

1. Follow the guide: https://gitlab.com/risingprismtv/single-gpu-passthrough/-/wikis/4)-Configuration-of-libvirt

Part -4 : Virtual Machine (VM)

1. Follow the guide: https://gitlab.com/risingprismtv/single-gpu-passthrough/-/wikis/5)-Configuring-Virtual-Machine-Manage

Part -5 : dGPU VBios and Binding

Warning the following may result in permanent DAMAGE, follow at your own RISK!

1. Find your gpu vbios here and Download it: https://www.techpowerup.com/vgabios/
2. Rename the Vbios file to: patched.rom
3. Create a Directory to store and use the vbios:

         cd ~/Downloads  
         sudo mkdir /var/lib/libvirt/vgabios
         cp ./patched.rom /var/lib/libvirt/vgabios/
         cd /var/lib/libvirt/vgabios/
         sudo chmod -R 660 patched.rom
         sudo chown YOURUSERNAME:YOURUSERNAME patched.rom

4. Adding the vbios to the VM by following the guide, make sure to use the correct directory: https://gitlab.com/risingprismtv/single-gpu-passthrough/-/wikis/8)-Attaching-the-GPU-to-your-VM

Part -6 : Inputs and Outputs

Passing USB & Audio Controller

1. Follow: https://gitlab.com/risingprismtv/single-gpu-passthrough/-/wikis/8)-Attaching-the-GPU-to-your-VM#adding-your-gpu-and-your-rom
2. Instead of passing the GPU, pass-through your PCIE groups(every device in your group) for your Usb and Audio Controller

Part -7 : Scripts

Scripts to prevent host from sleeping and etc.

1. Follow the guide: https://gitlab.com/risingprismtv/single-gpu-passthrough/-/wikis/7)-scripts-&-logfiles
2. Edit usr/local/bin/vfio-startup.sh to look like the following:

    killall kwin_wayland
    systemctl stop sddm.service

3. Edit usr/local/bin/vfio-teardown.sh to look like the following:

  systemctl restart sddm.service

4. Edit /etc/libvirt/hooks/qemu to change the name of the default VM name to match yours.

Enjoy!

Recommendation

1. CPU Performace Tuning, https://wiki.archlinux.org/title/PCI_passthrough_via_OVMF#CPU_pinning
2. Potential Anti-Cheat Help, Libvirt Part Only (not tested, use at your own risk) https://docs.vrchat.com/docs/using-vrchat-in-a-virtual-machine

Know Issues

1. Black screen after Guest(VM) shutdown, As far as I can tell, this is caused by SDDM (the display manager) failing to start properly, use lightdm instead. Its better to use https://gitlab.com/risingprismtv/single-gpu-passthrough for x11 based apps (lightdm and plasma)