VFIO "GPU Passthrough" Guide for Proxmox

BIOS Settings:

• Disable Above 4G
• Disable ReBAR
• Disable SR-IOV (Leave this enabled if using a Quadro or other SR-IOV enabled graphics accelerator)
• Enable IOMMU Support
• Enable VT-D
• Ensure primary output in BIOS is set to iGPU (NOT AUTO)
  

Proxmox Kernel Version:

• Ensure Proxmox is running on kernel version 6.0.2 or later - 

  pveversion -v

• Ensure Proxmox is running on the latest kernel -

• apt update
  apt dist-upgrade
  reboot

• Update the Proxmox Kernel Commandline to boot with IOMMU Support

• nano /etc/kernel/cmdline
  root=ZFS=rpool/ROOT/pve-1 boot=zfs
  Change to:
  For Intel:
  root=ZFS=rpool/ROOT/pve-1 boot=zfs quiet intel_iommu=on
  For AMD:
  root=ZFS=rpool/ROOT/pve-1 boot=zfs quiet intel_iommu=on

• Add Kernel Modules

• nano /etc/modules
  vfio
  vfio_iommu_type1
  vfio_pci
  vfio_virqfd

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