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    Intel Core Ultra iGPU passthrough

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    • A Offline
      antest
      last edited by olivierlambert

      Hi everybody,

      First of all I would like to thank all the contributors for the hard effort put into building and maintaining this project and for the vast amount of support that this forum has been giving!

      Specs:
      DELL Tower
      CPU: Intel Core Ultra 5 235
      XCP-ng 8.3

      I have been trying to passthrough the iGPU to a VM running Debian 13 but keep getting errors.
      I have successfully passed older intel iGPUs and have always worked perfectly.

      PCI pass through enabled:
      61c0db70-3708-4d9e-a580-d1b0d1207df1-image.png

      I don't know if this is normal but if I attach the GPU using xcp-ng center it shows up in XOA:
      c791357a-b8e7-48d3-8f20-59ead8f5890f-image.png

      But not as a pci device:
      00453442-af40-4383-bec2-61a0e9a20737-image.png

      Regardless, I have also attached as pci:
      Halted VM:
      3091b95d-f5bf-4dd2-8790-0f0c1d51b676-image.png

      Running VM:
      89de623a-6e21-4999-912f-91f26db91851-image.png

      Upon boot console gets filled:

      [   24.283971] i915 0000:00:08.0: [drm] *ERROR* GT1: GSC proxy component didn't bind within the expected timeout
[   24.283993] i915 0000:00:08.0: [drm] *ERROR* GT1: GSC proxy handler failed to init
[   48.271474] i915 0000:00:08.0: [drm] *ERROR* GT0: GUC: TLB invalidation response timed out for seqno 60
[   50.282144] i915 0000:00:08.0: [drm] *ERROR* GT0: GUC: TLB invalidation response timed out for seqno 61
[   52.294046] i915 0000:00:08.0: [drm] *ERROR* GT1: GUC: TLB invalidation response timed out for seqno 41
[   54.306843] i915 0000:00:08.0: [drm] *ERROR* GT1: GUC: TLB invalidation response timed out for seqno 42

      lspci detects the gpu, but it's not usable.

      Also tried changing to XE drivers instead of i915 and didn't help.

      Because I don't know enough to diagnose this, I tried asking AI which prompted me to perform "xen-pciback.hide" for the Intel Management Engine (ME) and still didn't help.
      Also tried with Ubuntu 25.10.

      Has anyone been able to pass through a similar iGPU?

      Sorry for the image spamming.

      Thank you.

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

        I'm not sure Intel iGPU passthrough can work. Let me ping @teddyastie maybe

        1 Reply Last reply Reply Quote 0
        • TeddyAstieT Offline
          TeddyAstie Vates 🪐 XCP-ng Team Xen Guru
          last edited by

          Do you get anything special written to xl dmesg in Dom0 ?

          A 1 Reply Last reply Reply Quote 0
          • A Offline
            antest @TeddyAstie
            last edited by

            @TeddyAstie

            I don't think so, it seems IOMMU is enabled:

            (XEN) [ 0.183949] Intel VT-d iommu 0 supported page sizes: 4kB, 2MB, 1GB
(XEN) [ 0.191524] I/O virtualisation enabled

            I'll leave the full log attached.

            xl_dmesg.txt

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