Hi Teddy,
thanks for the analysis and your brief explanation.
IOMMU should be properly activated:

(XEN) [ 0.221843] AMD-Vi: IOMMU Extended Features:
(XEN) [ 0.222606] - Peripheral Page Service Request
(XEN) [ 0.223366] - NX bit
(XEN) [ 0.224123] - Guest APIC Physical Processor Interrupt
(XEN) [ 0.224889] - Invalidate All Command
(XEN) [ 0.225649] - Guest APIC
(XEN) [ 0.226412] - Performance Counters
(XEN) [ 0.227178] - Host Address Translation Size: 0x2
(XEN) [ 0.227940] - Guest Address Translation Size: 0
(XEN) [ 0.228681] - Guest CR3 Root Table Level: 0x1
(XEN) [ 0.229416] - Maximum PASID: 0xf
(XEN) [ 0.230140] - SMI Filter Register: 0x1
(XEN) [ 0.230867] - SMI Filter Register Count: 0x1
(XEN) [ 0.231596] - Guest Virtual APIC Modes: 0x1
(XEN) [ 0.232316] - Dual PPR Log: 0x2
(XEN) [ 0.233024] - Dual Event Log: 0x2
(XEN) [ 0.233727] - Secure ATS
(XEN) [ 0.234424] - User / Supervisor Page Protection
(XEN) [ 0.235126] - Device Table Segmentation: 0x3
(XEN) [ 0.235826] - PPR Log Overflow Early Warning
(XEN) [ 0.236514] - PPR Automatic Response
(XEN) [ 0.237198] - Memory Access Routing and Control: 0x1
(XEN) [ 0.237881] - Block StopMark Message
(XEN) [ 0.238558] - Performance Optimization
(XEN) [ 0.239234] - MSI Capability MMIO Access
(XEN) [ 0.239906] - Guest I/O Protection
(XEN) [ 0.240570] - Enhanced PPR Handling
(XEN) [ 0.241231] - Invalidate IOTLB Type
(XEN) [ 0.241886] - VM Table Size: 0x2
(XEN) [ 0.242537] - Guest Access Bit Update Disable
(XEN) [ 0.252988] AMD-Vi: IOMMU 0 Enabled.
(XEN) [ 0.253820] I/O virtualisation enabled

I have also read about the problem with UEFI several times.
Now I am going to try to find a system with "legacy" boot mode.

I have installed XCP-ng version 8.2 ... same problem, unfortunately no success.

As next step I had compiled the GIM module and loaded it using "modprobe gim".
Looks better now:
kern_gim_compiled.txt

... and the devices are now also displayed:

#> lspci |grep Tonga
03:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tonga XT GL [FirePro S7150]
03:02.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tonga XTV GL [FirePro S7150V]
03:02.1 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tonga XTV GL [FirePro S7150V]
03:02.2 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tonga XTV GL [FirePro S7150V]
03:02.3 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tonga XTV GL [FirePro S7150V]
03:02.4 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tonga XTV GL [FirePro S7150V]
03:02.5 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tonga XTV GL [FirePro S7150V]
03:02.6 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tonga XTV GL [FirePro S7150V]
03:02.7 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tonga XTV GL [FirePro S7150V]
03:03.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tonga XTV GL [FirePro S7150V]
03:03.1 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tonga XTV GL [FirePro S7150V]
03:03.2 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tonga XTV GL [FirePro S7150V]
03:03.3 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tonga XTV GL [FirePro S7150V]
03:03.4 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tonga XTV GL [FirePro S7150V]
03:03.5 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tonga XTV GL [FirePro S7150V]
03:03.6 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tonga XTV GL [FirePro S7150V]
03:03.7 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tonga XTV GL [FirePro S7150V]
05:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tonga XT GL [FirePro S7150]
05:02.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tonga XTV GL [FirePro S7150V]
05:02.1 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tonga XTV GL [FirePro S7150V]
05:02.2 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tonga XTV GL [FirePro S7150V]
05:02.3 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tonga XTV GL [FirePro S7150V]
05:02.4 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tonga XTV GL [FirePro S7150V]
05:02.5 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tonga XTV GL [FirePro S7150V]
05:02.6 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tonga XTV GL [FirePro S7150V]
05:02.7 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tonga XTV GL [FirePro S7150V]
05:03.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tonga XTV GL [FirePro S7150V]
05:03.1 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tonga XTV GL [FirePro S7150V]
05:03.2 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tonga XTV GL [FirePro S7150V]
05:03.3 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tonga XTV GL [FirePro S7150V]
05:03.4 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tonga XTV GL [FirePro S7150V]
05:03.5 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tonga XTV GL [FirePro S7150V]
05:03.6 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tonga XTV GL [FirePro S7150V]
05:03.7 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tonga XTV GL [FirePro S7150V]

But assigning the vGPU to a VM ends with errors:

message "HANDLE_INVALID(PCI, OpaqueRef:906ee333-c899-fbc4-ee85-ef7da8ead9a2)"
name "XapiError"
stack "XapiError: HANDLE_INVALID(PCI, OpaqueRef:906ee333-c899-fbc4-ee85-ef7da8ead9a2)\n at Function.wrap (file:///usr/local/lib/node_modules/xo-server/node_modules/xen-api/_XapiError.mjs:16:12)\n at file:///usr/local/lib/node_modules/xo-server/node_modules/xen-api/transports/json-rpc.mjs:38:21\n at runNextTicks (node:internal/process/task_queues:60:5)\n at processImmediate (node:internal/timers:447:9)\n at process.callbackTrampoline (node:internal/async_hooks:128:17)"

XEN Source Logfile:
xensource.txt

I think the problem is with the initialization of the IOMMU interface:

Nov 13 11:30:21 xen03 kernel: [10188.720655] AMD IOMMUv2 driver by Joerg Roedel jroedel@suse.de
Nov 13 11:30:21 xen03 kernel: [10188.720656] AMD IOMMUv2 functionality not available on this system

As a quick & dirty action, I installed ALMA Linux 8 (kernel 4.18) to see if it behaves differently.
On ALMA the "amd_iommu_v2" module is loaded and initialized correctly:

messages:Nov 12 12:04:24 localhost kernel: iommu: Default domain type: Passthrough
messages:Nov 12 12:04:24 localhost kernel: pci 0000:00:00.2: AMD-Vi: IOMMU performance counters supported
messages:Nov 12 12:04:24 localhost kernel: pci 0000:00:01.0: Adding to iommu group 0
messages:Nov 12 12:04:24 localhost kernel: pci 0000:00:01.2: Adding to iommu group 1
...
...
messages:Nov 12 12:04:24 localhost kernel: pci 0000:11:00.6: Adding to iommu group 24
messages:Nov 12 12:04:24 localhost kernel: pci 0000:12:00.0: Adding to iommu group 25
messages:Nov 12 12:04:24 localhost kernel: pci 0000:00:00.2: AMD-Vi: Found IOMMU cap 0x40
messages:Nov 12 12:10:16 localhost kernel: perf/amd_iommu: Detected AMD IOMMU #0 (2 banks, 4 counters/bank).
messages:Nov 12 12:10:16 localhost kernel: AMD-Vi: AMD IOMMUv2 loaded and initialized

Does anyone have an idea what the problem could be?
I am very grateful for any advice!

@olivierlambert said in XCP-ng 8.3 & AMD Firepro S7150x2:

Have you read the release notes before going in 8.3?

Hello Olivier,
unfortunately not - do you think it makes sense to try the XCP-ng 8.2 version?

Hello,
I am trying in vain to get an "AMD Firepro S7150x2" to run on XCP-ng 8.3 (latest Release)

My Hardware configuration:

Motherboard: ASUS TUF x670E-PLUS (Firmware: Version 3042 from 2024/10/22 )
BIOS settings:

• CSM -> disabled
• SR-IOV -> enabled
• IOMMU from auto -> enabled

CPU: AMD Ryzen 9 7950X3D 16-Core Processor

Steps I have already done:

1. Installation of supplemental Pack "mxgpu-2.0.0.amd.iso"

2. Exclude Modules for initramfs:
   echo "blacklist radeon" >> /etc/modprobe.d/blacklist.conf
   echo "blacklist amdgpu" >> /etc/modprobe.d/blacklist.conf
   echo "blacklist amdkfd" >> /etc/modprobe.d/blacklist.conf
   --> rebuild initramfs

3. Set Bootparameter in "grub2-efi.cfg":
   /opt/xensource/libexec/xen-cmdline --set-dom0 "pci=realloc pci=assign-busses"

4. Load "gim" Modules
   -> kern.log output with errors (as file attached):
   AMD_FIREPRO_gim_kern.txt

Does anyone have an idea where the problem could be?
Would be grateful for any help.