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    XCP-ng GPU Passthrough - No GPU found

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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/#

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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.

                                  1 Reply Last reply Reply Quote 0
                                  • 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.

                                    1 Reply Last reply Reply Quote 0
                                    • J Offline
                                      jmccoy555
                                      last edited by

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

                                      1 Reply Last reply Reply Quote 0
                                      • 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
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