Trying to recreate this, I have a xhci Host controller (no extra card, but as
part of the chipset).
00:14.0 USB controller: Intel Corporation C610/X99 series chipset USB xHCI
Host Controller (rev 05)
00:14.0 USB controller: Intel Corporation C610/X99 series chipset USB xHCI Host
Controller (rev 05) (prog-if 30 [XHCI])
Subsystem: Hewlett-Packard Company C610/X99 series chipset USB xHCI
Host Controller
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+
Stepping- SERR+ FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0
Interrupt: pin D routed to IRQ 19
NUMA node: 0
Region 0: Memory at 39ffff00000 (64-bit, non-prefetchable) [size=64K]
Capabilities: <access denied>
Kernel driver in use: xhci_hcd
First check if it can be unbound:
echo 0000:00:14.0 | sudo tee /sys/bus/pci/devices/0000:00:14.0/driver/unbind
Works and I see:
[2071597.213764] xhci_hcd 0000:00:14.0: remove, state 4
[2071597.213778] usb usb5: USB disconnect, device number 1
[2071597.215019] xhci_hcd 0000:00:14.0: USB bus 5 deregistered
[2071597.215036] xhci_hcd 0000:00:14.0: remove, state 4
[2071597.215046] usb usb4: USB disconnect, device number 1
[2071597.215049] usb 4-3: USB disconnect, device number 2
[2071597.218160] xhci_hcd 0000:00:14.0: USB bus 4 deregistered
FYI: Libvirt should do the unbind/bind for you at runtime if you
configured it as managed hostdev
Check ID
$ lspci -n -s 00:14.0
00:14.0 0c03: 8086:8d31 (rev 05)
Tell vfio-pci to handle that
$ echo 8086 8d31 | sudo tee /sys/bus/pci/drivers/vfio-pci/new_id
I get a fail to bind it like:
vfio-pci: probe of 0000:00:14.0 failed with error
But then on this system I always failed to get vfio working due to FW
issues (not a Linux issue).
You might try the above but for your device to initially rule out all of the
modprobe/boot timing that might affect it.
After boot just try to:
1. unbind your device from xhci
2. make the ID known to vfio-pci
(that should autoload it then)
Report back the kernel you have and the success or fail when doing so, along a
dmesg log of the try.
That should clarify if we look at vfio-pci no more being able to load at all
(above test fails) or just at how to prep cour config correctly so that it
works again.
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https://bugs.launchpad.net/bugs/1781891
Title:
PCI USB card passthrough does not work any more
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