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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

      Yeah, we had specific threa instructions to remove the Nvidia/Citrix vGPU thing for XCP-ng because it's not Open Source.

      On Intel side, recent Xeon supports it (but you know Intel graphic perfs lol…) and also AMD FirePro S7150 (16vGPU).

      1 Reply Last reply Reply Quote 4
      • 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.

            1 Reply Last reply Reply Quote 1
            • 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 😛

              1 Reply Last reply Reply Quote 0
              • 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.

                  1 Reply Last reply Reply Quote 0
                  • 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.

                    1 Reply Last reply Reply Quote 0
                    • 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 🙂

                          1 Reply Last reply Reply Quote 0
                          • 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

                            1 Reply Last reply Reply Quote 0
                            • 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?

                                1 Reply Last reply Reply Quote 0
                                • 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/

                                    1 Reply Last reply Reply Quote 0
                                    • 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
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