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    XCP-ng GPU Passthrough - No GPU found

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    • borzelB Offline
      borzel XCP-ng Center Team @misterpc23
      last edited by

      @misterpc23 sometimes even lazy people have to go to the cli 😉

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      • M Offline
        misterpc23 @borzel
        last edited by

        @borzel It wasn't scary at all! Only downside is my gpu hasn't showed up so I'm thinking it is not supported (R370). Where could I find a list of GPU's that will work with PCI passthrough with XCP-NG? Thank you for any help 🙂

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        • I Offline
          imtrobin
          last edited by

          KVM is quite easy to spoof the VM so the nvidia drivers work. Is it possible to do easily for xcp?

          https://lists.xenproject.org/archives/html/xen-devel/2016-07/msg01713.html

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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)

                        J 1 Reply Last reply Reply Quote 0
                        • 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 😉

                              1 Reply Last reply Reply Quote 1
                              • 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...

                                          I 1 Reply Last reply Reply Quote 1
                                          • 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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