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AMDGopDriver-5825U.rom
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Proxmox Passthrough Guide

================================

Introduction

Thanks to the contributions of isc30 and my own tests, I'm happy to share this guide on how to set up Proxmox passthrough.

Non-Subscription Updates

To get Proxmox updates without a subscription, run the following command:

bash -c "$(wget -qLO - https://github.com/tteck/Proxmox/raw/main/misc/post-pve-install.sh)"

Install CPU Microcode Packages

Install the CPU microcode packages by running:

bash -c "$(wget -qLO - https://github.com/tteck/Proxmox/raw/main/misc/microcode.sh)"

Identify AMD/ATI Devices

Run the following command to identify AMD/ATI devices:

lspci -nn | grep -e 'AMD/ATI'

Output

The output should look something like this:

05:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Barcelo [1002:15e7] (rev c1)
05:00.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI] Renoir Radeon High Definition Audio Controller [1002:1637]

Configure GRUB

Add iommu=pt to GRUB by running:

sed -i 's/GRUB_CMDLINE_LINUX_DEFAULT="quiet"/GRUB_CMDLINE_LINUX_DEFAULT="quiet iommu=pt"/g' /etc/default/grub
update-grub

Configure VFIO

Configure VFIO by adding the following lines to /etc/modprobe.d/vfio.conf:

echo "vfio" >> /etc/modules
echo "vfio_iommu_type1" >> /etc/modules
echo "vfio_pci" >> /etc/modules
echo "vfio_virqfd" >> /etc/modules
echo "options vfio-pci ids=1002:15e7,1002:1637" >> /etc/modprobe.d/vfio.conf

echo "softdep amdgpu pre: vfio-pci" >> /etc/modprobe.d/vfio.conf
echo "softdep snd_hda_intel pre: vfio-pci" >> /etc/modprobe.d/vfio.conf

echo "blacklist amdgpu" >> /etc/modprobe.d/pve-blacklist.conf
echo "blacklist snd_hda_intel" >> /etc/modprobe.d/pve-blacklist.conf

Update Initramfs

Update initramfs by running:

update-initramfs -u -k all
shutdown -r now

Create BIOS .bin File

Create vbios.c File

Create a vbios.c file with the following contents:

Expand vbios.c 
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>

typedef uint32_t ULONG;
typedef uint8_t UCHAR;
typedef uint16_t USHORT;

typedef struct {
    ULONG Signature;
    ULONG TableLength; // Length
    UCHAR Revision;
    UCHAR Checksum;
    UCHAR OemId[6];
    UCHAR OemTableId[8]; // UINT64  OemTableId;
    ULONG OemRevision;
    ULONG CreatorId;
    ULONG CreatorRevision;
} AMD_ACPI_DESCRIPTION_HEADER;

typedef struct {
    AMD_ACPI_DESCRIPTION_HEADER SHeader;
    UCHAR TableUUID[16]; // 0x24
    ULONG VBIOSImageOffset; // 0x34. Offset to the first GOP_VBIOS_CONTENT block from the beginning of the stucture.
    ULONG Lib1ImageOffset; // 0x38. Offset to the first GOP_LIB1_CONTENT block from the beginning of the stucture.
    ULONG Reserved[4]; // 0x3C
} UEFI_ACPI_VFCT;

typedef struct {
    ULONG PCIBus; // 0x4C
    ULONG PCIDevice; // 0x50
    ULONG PCIFunction; // 0x54
    USHORT VendorID; // 0x58
    USHORT DeviceID; // 0x5A
    USHORT SSVID; // 0x5C
    USHORT SSID; // 0x5E
    ULONG Revision; // 0x60
    ULONG ImageLength; // 0x64
} VFCT_IMAGE_HEADER;

typedef struct {
    VFCT_IMAGE_HEADER VbiosHeader;
    UCHAR VbiosContent[1];
} GOP_VBIOS_CONTENT;

int main(int argc, char** argv)
{
    FILE* fp_vfct;
    FILE* fp_vbios;
    UEFI_ACPI_VFCT* pvfct;
    char vbios_name[0x400];

    if (!(fp_vfct = fopen("/sys/firmware/acpi/tables/VFCT", "r"))) {
        perror(argv[0]);
        return -1;
    }

    if (!(pvfct = malloc(sizeof(UEFI_ACPI_VFCT)))) {
        perror(argv[0]);
        return -1;
    }

    if (sizeof(UEFI_ACPI_VFCT) != fread(pvfct, 1, sizeof(UEFI_ACPI_VFCT), fp_vfct)) {
        fprintf(stderr, "%s: failed to read VFCT header!\n", argv[0]);
        return -1;
    }

    ULONG offset = pvfct->VBIOSImageOffset;
    ULONG tbl_size = pvfct->SHeader.TableLength;

    if (!(pvfct = realloc(pvfct, tbl_size))) {
        perror(argv[0]);
        return -1;
    }

    if (tbl_size - sizeof(UEFI_ACPI_VFCT) != fread(pvfct + 1, 1, tbl_size - sizeof(UEFI_ACPI_VFCT), fp_vfct)) {
        fprintf(stderr, "%s: failed to read VFCT body!\n", argv[0]);
        return -1;
    }

    fclose(fp_vfct);

    while (offset < tbl_size) {
        GOP_VBIOS_CONTENT* vbios = (GOP_VBIOS_CONTENT*)((char*)pvfct + offset);
        VFCT_IMAGE_HEADER* vhdr = &vbios->VbiosHeader;

        if (!vhdr->ImageLength)
            break;

        snprintf(vbios_name, sizeof(vbios_name), "vbios_%x_%x.bin", vhdr->VendorID, vhdr->DeviceID);

        if (!(fp_vbios = fopen(vbios_name, "wb"))) {
            perror(argv[0]);
            return -1;
        }

        if (vhdr->ImageLength != fwrite(&vbios->VbiosContent, 1, vhdr->ImageLength, fp_vbios)) {
            fprintf(stderr, "%s: failed to dump vbios %x:%x\n", argv[0], vhdr->VendorID, vhdr->DeviceID);
            return -1;
        }

        fclose(fp_vbios);

        printf("dump vbios %x:%x to %s\n", vhdr->VendorID, vhdr->DeviceID, vbios_name);

        offset += sizeof(VFCT_IMAGE_HEADER);
        offset += vhdr->ImageLength;
    }

    return 0;
}

Compile and Run the Script

Compile the script using gcc and run it:

gcc vbios.c -o vbios
./vbios

Download AMDGopDriver-5825U.rom

Download the AMDGopDriver-5825U.rom file from alex-1987/proxmox-passtrough-5825U.

Rename and Move Files

Rename and move the files to the correct locations:

mv vbios_*.bin vbios_5825U.bin
mv vbios_5825U.bin /usr/share/kvm/
mv AMDGopDriver-5825U.rom /usr/share/kvm/

Update PVE Config

Update your PVE config file (/etc/pve/qemu-server/1010.conf) with the following lines:

hostpci0: 0000:05:00.0,romfile=vbios_5825U.bin,x-vga=1
hostpci1: 0000:05:00.1,romfile=AMDGopDriver-5825U.rom

Check IGPU works in the VM!!!

Run these in the VM where you passed through the IGPU

Check if the CPU is in the dev list

ls /dev/dri/

The output should look something like this:

by-path  card0  renderD128

Check with lspci the driver in use:

 lspci -nnk | grep AMD -A 3

output: (Kernel driver in use: amdgpu)

06:10.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Barcelo [1002:15e7] (rev c1)
        Subsystem: Advanced Micro Devices, Inc. [AMD/ATI] Barcelo [1002:0123]
        Kernel driver in use: amdgpu
        Kernel modules: amdgpu
06:11.0 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI] Renoir Radeon High Definition Audio Controller [1002:1637]
        Subsystem: Advanced Micro Devices, Inc. [AMD/ATI] Renoir Radeon High Definition Audio Controller [1002:1637]
        Kernel driver in use: snd_hda_intel
        Kernel modules: snd_hda_intel
06:12.0 Ethernet controller [0200]: Red Hat, Inc. Virtio network device [1af4:1000]

VM Config

Here is an example VM config file (/etc/pve/qemu-server/1010.conf):

agent: 1
bios: ovmf
boot: order=scsi0;ide2;net0
cores: 10
cpu: x86-64-v2-AES
efidisk0: local-lvm:vm-1010-disk-0,efitype=4m,pre-enrolled-keys=1,size=4M
hostpci0: 0000:05:00.0,romfile=vbios_5825U.bin,x-vga=1
hostpci1: 0000:05:00.1,romfile=AMDGopDriver-5825U.rom
ide2: none,media=cdrom
machine: q35
memory: 16384
meta: creation-qemu=9.0.2,ctime=1736754641
name: Docker-Server
net0: virtio=BC:24:11:A2:E5:CD,bridge=vmbr1,firewall=1
numa: 0
ostype: l26
scsi0: data:vm-1010-disk-1,iothread=1,size=32G
scsi1: data:vm-1010-disk-6,size=5000G
scsi2: data:vm-1010-disk-3,iothread=1,size=100G
scsi3: data:vm-1010-disk-4,iothread=1,size=1000G
scsi4: data:vm-1010-disk-5,iothread=1,size=1T
scsihw: virtio-scsi-single
serial0: socket
smbios1: uuid=5b04eac1-df70-4d31-b278-7208b2d76055
sockets: 1
unused0: data:vm-1010-disk-0
unused1: data:vm-1010-disk-2
usb0: host=1-4
vga: none
vmgenid: 4a8a252e-4fc5-460b-a436-443fd12d0274

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