Proxmox 8 PCI Passthrough

Setup

Bootloader: Grub
Graphics Card: AMD Radeon 5700xt

Working Configuration

Edit/create grub file located at /etc/default/grub

GRUB_CMDLINE_LINUX_DEFAULT="quiet amd_iommu=on iommu=pt nomodeset pcie_acs_override=downstream initcall_blacklist=sysfb_init"

Edit/create modules file located at /etc/modules

vendor-reset
vfio
vfio_iommu_type1
vfio_pci
vfio_virqfd

Edit/create vfio.conf file located at /etc/modprobe.d/vfio.conf

options vfio-pci ids=1002:731f,1002:ab38 disable_vga=1

Created a service to set the reset_method using method shown here

Edit/create vrwa service file located at /lib/systemd/system/vrwa.service

[Unit]
Description=vrwa Service
After=multi-user.target

[Service]
ExecStart=/usr/bin/bash -c 'echo device_specific > /sys/bus/pci/devices/0000:0c:00.0/reset_method'

[Install]
WantedBy=multi-user.target

Once created run the following command to enable to service:

systemctl enable vrwa

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Resources

• https://pve.proxmox.com/wiki/PCI_Passthrough
• https://forum.proxmox.com/threads/amd-gpu-inaccessible-after-vm-poweroff-unable-to-change-power-state-from-d3cold-to-d0-device-inaccessible.130975/#post-633195
• https://github.com/gnif/vendor-reset
• https://forum.proxmox.com/threads/problem-with-gpu-passthrough.55918/page-2#post-478351
• https://forum.proxmox.com/threads/gpu-passthrough-issues-after-upgrade-to-7-2.109051/
• https://www.reddit.com/r/homelab/comments/b5xpua/the_ultimate_beginners_guide_to_gpu_passthrough/