@andriy.sultanov

@andriy.sultanov said:

@pandusen As Teddy said above, you can't passthrough a PCI bridge, so there's no PCI devices xapi shouldn't omit here.

I am not trying to pass through the bridge only the end points. The Intel arc's have 2 end points: The GPU and the Sound device. "xe pci-list" only reveals the GPU, not the sound device. (this works for nvidia and AMD)

But "going the xen-cmdline way" shouldn't break anything, that's what xe pci-disable-dom0-access does behind the scenes. What issues did you see? Which steps did you follow?

the sound device is available in the lspci list and can be passed through using CLI.
But doing so, (using CLI for passtrough) undoes everything done using xe or the passthrough gui in XO. and results in this:
https://xcp-ng.org/forum/topic/10609/xcp-ng-8.3-pci-passthrough-issue
so yes, its does break something.

@andriy.sultanov said:
I'll try to see why other devices are omitted and how this can be fixed.

Any news on this?
I have been fighting with getting an Intel Arc Pro B50 to work on Linux for months and i suspect that, the fact that the audio device isn't present, is what makes Linux fail to load the driver correctly.

Going the xen-cmdline way, seams to disable xe passthrough both in command line and in XO gui, causing all kinds of issues.

Windows seems to be able to initialise the GPU driver without the audio device, but it is in some kind of borked state. You can send workload to the GPU but the drivers are complaining about "no-pci compatibility".

XCP-ng 8.3 (latest patches)
Fedora server 44 - Kernel 7.1.5-201
on latest Arc firmware as well.