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    XCP-ng GPU Passthrough - No GPU found

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    • D Offline
      DustinB
      last edited by

      So a rock and a hard place. . . don't get the performance for the money or spend a ton of money. . .

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

        vGPU is still "reserved" for Virtual Desktop Infrastructure, which is a VERY lucrative and closed source world.

        tjkreidlT 1 Reply Last reply Reply Quote 1
        • tjkreidlT Offline
          tjkreidl Ambassador @olivierlambert
          last edited by tjkreidl

          @olivierlambert Indeed. NVIDIA in particular is bent on your having to license any sort of vGPU technology and it would not surprise me to see even passthrough leveraged at some point in the future. There are already restrictions on being able to make use of Quadro features, for example, of you don't have licenses.

          Also, note that you need one video board reserved to run the native OS (XCP-ng) dom0 instance itself, so the server has to effectovely have at least two graphics boards such that one can be used as a GPU.

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

            Yeah, with GRID you need to pay also for the "driver" if I'm correct.

            AMD approach is far better IMHO (using "standard" SRIOV) but that's because they are probably lagging in the market. Nvidia and Intel have somehow very similar business methods 😛

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

              @tjkreidl hmm it's not possible to "remove" the GPU for the dom0? It won't boot without it?

              tjkreidlT 1 Reply Last reply Reply Quote 0
              • tjkreidlT Offline
                tjkreidl Ambassador @olivierlambert
                last edited by

                @olivierlambert No, it needs it (some sort of video board is necessary or it won't run at all). It has to at least be able to render the xsconsole interface.

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

                  Okay good to know 🙂 I had the hope that a serial console would be enough. I'll take a look if I can have any luck.

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                  • M Offline
                    misterpc23
                    last edited by

                    So when will PCI passthrough be available through the GUI for lazy people such as myself? I don't mind dedicating a whole card per VM (Prefer it actually) but am highly hesitant to use the console. Thank you for all of the hard work, XCP-ng is awesome!

                    borzelB 1 Reply Last reply Reply Quote 0
                    • borzelB Offline
                      borzel XCP-ng Center Team @misterpc23
                      last edited by

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

                      M 1 Reply Last reply Reply Quote 0
                      • 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.

                            1 Reply Last reply Reply Quote 0
                            • 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 🙂

                                1 Reply Last reply Reply Quote 0
                                • 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/#

                                    1 Reply Last reply Reply Quote 0
                                    • 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 ?

                                      1 Reply Last reply Reply Quote 0
                                      • 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
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