iGPU passthrough

Tutorial inspired by this one

Enable VGA card UEFI with ZFS

1. Connect to Proxmox with SSH or via SHELL

2. Edit the kernel cmdline file

   vim /etc/kernel/cmdline
   

   Append quiet intel_iommu=on iommu=pt to the line, you should obtain something like this :

   root@pve:~# cat /etc/kernel/cmdline
   root=ZFS=rpool/ROOT/pve-1 boot=zfs quiet intel_iommu=on iommu=pt
   

3. Update the modules file

   vim /etc/modules
   

   Add this to the file :

   vfio
   vfio_iommu_ype1
   vfio_pci
   vfio_virqf
   

   You should obtain something like this :

   root@pve:~# cat /etc/modules
   # /etc/modules: kernel modules to load at boot time.
   #
   # This file contains the names of kernel modules that should be loaded
   # at boot time, one per line. Lines beginning with "#" are ignored.
   # Parameters can be specified after the module name.
   
   vfio
   vfio_iommu_ype1
   vfio_pci
   vfio_virqfd
   

4. Refresh the efi boot file pve-efiboot-tool refresh

   root@pve:~# pve-efiboot-tool refresh
   Running hook script 'proxmox-auto-removal'..
   Running hook script 'zz-proxmox-boot'..
   Re-executing '/etc/kernel/postinst.d/zz-proxmox-boot' in new private mount namespace..
   Copying and configuring kernels on /dev/disk/by-uuid/5EBA-2B61
       Copying kernel and creating boot-entry for 6.2.16-19-pve
       Copying kernel and creating boot-entry for 6.5.11-4-pve
       Removing old version 6.2.16-3-pve
   Copying and configuring kernels on /dev/disk/by-uuid/5EBA-9A63
       Copying kernel and creating boot-entry for 6.2.16-19-pve
       Copying kernel and creating boot-entry for 6.5.11-4-pve
       Removing old version 6.2.16-3-pve
   

5. Reboot the system

   root@pve:~# reboot
   

6. Verify that IOMMU is enabled dmesg | grep -e DMAR -e IOMMU

   root@pve:~# dmesg | grep -e DMAR -e IOMMU
   [    0.017850] ACPI: DMAR 0x0000000075516000 000088 (v02 INTEL  EDK2     00000002      01000013)
   [    0.017883] ACPI: Reserving DMAR table memory at [mem 0x75516000-0x75516087]
   [    0.047825] DMAR: IOMMU enabled
   [    0.106238] DMAR: Host address width 39
   

Configure the iGPU to Ubuntu guest VM

1. Create a Ubuntu VM (I've a 22.04.3 LTS one)

1. Pass the iGPU from proxmox to the VM

   Add new PCI Device

2. Choose the one with Alder Lake-N [UHD Graphics]

   Choose the iGPU device

3. Enable some functions

   

4. Disable the display of the VM

   

5. Reboot the VM

6. Connect to it through SSH
7. Install linux-image-generic-hwe-22.04

   root@ubuntu-docker:/# apt update
   root@ubuntu-docker:/# apt install linux-image-generic-hwe-22.04
   

8. Reboot

   root@ubuntu-docker:/# reboot
   

9. Check that renderD128 is present

   root@ubuntu-docker:~# ls /dev/dri
   by-path  card0  renderD128
   

You're good to go !