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    XCP-ng GPU Passthrough - No GPU found

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    • olivierlambertO Offline
      olivierlambert Vates 🪐 Co-Founder CEO
      last edited by

      You can pass the entire GPU if you like, it's no big deal. vGPU is another story.

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      • I Offline
        imtrobin
        last edited by

        I'm talking about GPU Passthrough, not vGPU. The GPU is passthrough fine but the nvidia driver results in code 43, meaning the driver detected it is running in a VM.

        KVM bypass this by spoofing the VM, and it works, so can XCP do similar?

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        • olivierlambertO Offline
          olivierlambert Vates 🪐 Co-Founder CEO
          last edited by

          IDK what it means to spoofing the VM. If you can tell what's needed exactly, maybe we could do something 🙂

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          • I Offline
            imtrobin
            last edited by

            In KVM, I need to do these

            1. turn on cpu hidden state

            https://wiki.archlinux.org/index.php/PCI_passthrough_via_OVMF#"Error_43:_Driver_failed_to_load"_on_Nvidia_GPUs_passed_to_Windows_VMs

            1. Assign the gpu to vfio directly (I guess we may not need to do this here)

            2. Blacklist the nvidia drivers like this

            https://techblog.jeppson.org/2018/03/windows-vm-gtx-1070-gpu-passthrough-proxmox-5/

            https://forum.proxmox.com/threads/gpu-passthrough-tutorial-reference.34303/

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            • I Offline
              imtrobin
              last edited by

              Hi, so some people have been able to do it

              https://gridforums.nvidia.com/default/topic/9108/#

              https://gridforums.nvidia.com/default/topic/8934/#

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              • P Offline
                Pejcik
                last edited by Pejcik

                Hello,

                My idea was to passthrough GPU to specific VM. According to many informations from the Internet, I'm doing this like that:

                1. /opt/xensource/libexec/xen-cmdline --set-dom0 "xen-pciback.hide=(03:00.0)(03:00.1)"
                  but still even after reboot I see it on lspci
                2. xe vm-param-set other-config:pci=0/0000:03:00.0, 0/0000:03:00.1 uuid=c41704d0-a1f2-6bc1-fe2e-adc26697e636
                  for old Nvidia 8600 and GT430 it doesn't work - Windows VM see that device, drivers are installed but all the time I have error 43 and this device is stopped
                  for Radeon 7870 it work ok

                Audio and USB is working with that metod also.

                Is this connected with Vbios of this GPU's ?

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                • L Offline
                  linhnb
                  last edited by

                  Finally, we have GPU passthrough in the GUI,
                  But it is not working...
                  My setup:
                  CPU 2700x
                  MOBO: x470 Taichi
                  RAM: 32GB
                  GPU: Rx580 sapphire Nitro 4GB

                  Please, I did use CLI and GUI, no work.
                  Cannot see it in Windows.
                  acc4199c-4b96-4306-b765-e6492841f099-image.png ![alt text](image url)

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                  • A Offline
                    anthonyh
                    last edited by

                    Ironically, I am trying to do this as well. I put a second graphics card in a host (NVIDIA NVS 510) and made sure the appropriate virtalization settings were enabled in the BIOS. Running up to date XCP-ng 8.0 (yum update as of yesterday afternoon). I can assign the GPU to the Windows Server 2016 guest in XCP-ng Center, and the NVIDIA drivers seem to install fine, but Device Manager reports the following:

                    85c90cd3-11ae-49a3-ac29-ff5a07488c81-image.png

                    What's also interesting is even though it warns that you must be able to access the VM remotely as there will be no local console, there is still a local console. I don't know if this means anything.

                    Any ideas?

                    J L 2 Replies Last reply Reply Quote 0
                    • J Offline
                      jmccoy555 @anthonyh
                      last edited by

                      @anthonyh Google code 43 NVIDIA...... Basic translation is we want to stop you doing this with a consumer card in a VM. There are solutions I believe.

                      A 1 Reply Last reply Reply Quote 0
                      • olivierlambertO Offline
                        olivierlambert Vates 🪐 Co-Founder CEO
                        last edited by

                        Yes, using Nvidia card supporting GPU passthrough 😛

                        Otherwise, there's "border line" patches on Windows drivers available on GitHub, but we won't find those for you 😉

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                        • J Offline
                          jmccoy555 @linhnb
                          last edited by

                          @linhnb don't think you can use the GUI for GPUs, only vGPUs.

                          RX580 does work, just follow the PCI passthrough guide.

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                          • olivierlambertO Offline
                            olivierlambert Vates 🪐 Co-Founder CEO
                            last edited by

                            AMD cards are indeed far better for both vGPU and GPU passthrough: it just works.

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                            • J Offline
                              jmccoy555
                              last edited by

                              If only they made a LP vGPU card.... Looks like a WX4100 will have to do.

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                              • L Offline
                                linhnb @anthonyh
                                last edited by

                                @anthonyh yeah, I also got this note in version 8.1. I just don't know why. But my VM can't see Rx580, that's the problem

                                @olivierlambert man, please, I got problem right here with AMD GPU. Please help.

                                @jmccoy555 You can use the GUI. I checked, the code changes as if you do make it in CLI. please check the newest version 8.1
                                b8929c93-4fea-4225-812e-6dbf288f2b5f-image.png
                                6e41aa83-4789-4da5-9ecf-2a77e2ffce6d-image.png

                                olivierlambertO J 2 Replies Last reply Reply Quote 0
                                • A Offline
                                  anthonyh @jmccoy555
                                  last edited by

                                  @jmccoy555 said in XCP-ng GPU Passthrough - No GPU found:

                                  @anthonyh Google code 43 NVIDIA...... Basic translation is we want to stop you doing this with a consumer card in a VM. There are solutions I believe.

                                  @olivierlambert said in XCP-ng GPU Passthrough - No GPU found:

                                  Yes, using Nvidia card supporting GPU passthrough 😛

                                  Otherwise, there's "border line" patches on Windows drivers available on GitHub, but we won't find those for you 😉

                                  Well, this card is technically in the Quadro family, so I was hoping it'd work. I see solutions for libvirt/KVM, but not Xen. Any "nudge" would be greatly appreciated if anyone is willing. This is just a test environment. If the application works in this setup we'll buy proper hardware and go the AMD route.

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                                  • A Offline
                                    anthonyh
                                    last edited by

                                    I think I might have found the GitHub driver patch @olivierlambert was referring to...

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                                    • olivierlambertO Offline
                                      olivierlambert Vates 🪐 Co-Founder CEO @linhnb
                                      last edited by

                                      @linhnb

                                      1. I was answering to @anthonyh
                                      2. You are on a community forum 😉
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                                      • J Offline
                                        jmccoy555 @linhnb
                                        last edited by jmccoy555

                                        @linhnb said in XCP-ng GPU Passthrough - No GPU found:

                                        You can use the GUI. I checked, the code changes as if you do make it in CLI. please check the newest version 8.1

                                        Thanks for the tip!! Working in 8.1 in XCP-ng Center and also XO 🙂

                                        Also, dont think there is a need to 'hide' the GPU from Dom0 now??

                                        edit: Did a fresh install, no need to 'xen-pciback.hide' when assigning via XO or XCP-ng center. This was with AMD as they play nicely, not sure about NVIDIA.

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                                        • I Offline
                                          imtrobin @anthonyh
                                          last edited by

                                          This post is deleted!
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                                          • I Offline
                                            imtrobin @jmccoy555
                                            last edited by

                                            @jmccoy555 You got nvidia GPU working in VM?

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