xhci_pci no longer being built as a module as of 6.12

menders · 2024-11-19 23:41:11

Hi,

I had a working VFIO setup for qemu on kernel 6.11.8 which broke earlier today when installing the 6.12 kernel. I'm using modprobe.d to isolate my USB BT device, a GPU (and associated audio device), and a USB controller like so:

/etc/modprobe.d/vfio.conf:

blacklist btusb
softdep nouveau pre: vfio-pci
softdep snd_hda_intel pre: vfio-pci
softdep xhci_pci pre: vfio-pci
options vfio-pci ids=10de:2684,10de:22ba,1022:15b6

This no longer works as it seems xhci_pci is no longer being built as a module. Looking at the latest gitlab commit for 6.12.arch1-1 you can see the change to the kernel config. Why was this change made? I'm no longer able to use my USB controller inside my virtual machine. Should I open a bug? Is there a workaround so that I can use this kernel or am I stuck on 6.11 for a while?

Thanks!

loqs · 2024-11-20 04:09:20

menders wrote:

Is there a workaround so that I can use this kernel or am I stuck on 6.11 for a while?

You could try preventing the built-in xhci-pci from being initialized by adding to the Kernel parameters

initcall_blacklist=xhci_pci_init

seth · 2024-11-20 08:43:03

1022:15b6 is probably not the only usb hub and xhci_pci supposed to drive some others?

Why was this change made? … Should I open a bug?

shrug and probably - otherwise you'll probably have to unbind the controller at runtime, https://wiki.archlinux.org/title/PCI_pa … _device_ID but you'll at leat get an explanation of the status quo.

menders · 2024-11-20 15:05:49

loqs wrote:

menders wrote:
Is there a workaround so that I can use this kernel or am I stuck on 6.11 for a while?
You could try preventing the built-in xhci-pci from being initialized by adding to the Kernel parameters
initcall_blacklist=xhci_pci_init

That might be a problem as I have multiple USB controllers in the system and I need the others.

menders · 2024-11-20 15:08:13

seth wrote:

1022:15b6 is probably not the only usb hub and xhci_pci supposed to drive some others?
Why was this change made? … Should I open a bug?
shrug and probably - otherwise you'll probably have to unbind the controller at runtime, https://wiki.archlinux.org/title/PCI_pa … _device_ID but you'll at leat get an explanation of the status quo.

I did try unbinding after the system had booted but the system locks up when I do so. This is why I've been handling it using modprobe.d.

seth · 2024-11-20 15:14:55

What does "locks up" mean?
You'll lose whatever pci device you unbind, for a usb controller, the usb devices attached to it. You might have to unbind/remove those first, https://unix.stackexchange.com/question … ice-dongle

menders · 2024-11-20 16:39:34

seth wrote:

What does "locks up" mean?
You'll lose whatever pci device you unbind, for a usb controller, the usb devices attached to it. You might have to unbind/remove those first, https://unix.stackexchange.com/question … ice-dongle

The system is frozen -- completely unresponsive to input.

Connected to this controller is a USB hub with many devices. Is there an easy, programmatic way to unbind all USB devices connected to this hub before I unbind the controller from the PCI bus?

loqs · 2024-11-20 17:20:04

It might be quicker to build a 6.12 kernel locally with xhci-pci changed back to a module.
Edit:
https://gitlab.archlinux.org/archlinux/ … /issues/91

Last edited by loqs (2024-11-20 19:34:01)

Arch Linux

#1 2024-11-19 23:41:11

xhci_pci no longer being built as a module as of 6.12

#2 2024-11-20 04:09:20

Re: xhci_pci no longer being built as a module as of 6.12

#3 2024-11-20 08:43:03

Re: xhci_pci no longer being built as a module as of 6.12

#4 2024-11-20 15:05:49

Re: xhci_pci no longer being built as a module as of 6.12

#5 2024-11-20 15:08:13

Re: xhci_pci no longer being built as a module as of 6.12

#6 2024-11-20 15:14:55

Re: xhci_pci no longer being built as a module as of 6.12

#7 2024-11-20 16:39:34

Re: xhci_pci no longer being built as a module as of 6.12

#8 2024-11-20 17:20:04

Re: xhci_pci no longer being built as a module as of 6.12

Board footer