Up until about a week ago, I could pass through the USB controller for
my front panel to my gaming VM and it would work just fine. Since then,
though, and I'm not exactly sure what triggered it, it appears as if
said controller isn't properly being released by the VM when it shuts
down on its own (i.e : When I initiate a shutdown from within the guest
and let it complete). Interestingly, getting libvirt to destroy the VM
works just fine, and I can reboot without issues this way.
On a "bad" shut down, virt-manager says the VM is "Shutting down" and
won't let me do anything with it. Trying to use virsh directly doesn't
seem to do anything, as the operation just blocks forever. Trying to
restart libvirtd only makes it unresponsive. The Qemu logs for the VM
themselves have this interesting bit :
vfio : Cannot reset device 0000:00:14.0, no available reset mechanism
Going back to earlier entries makes it seem like the USB controller
always did this, although this line would usually be followed by
something like this :
terminating on signal 15 prom pid 8360
This no longer appears in newer entries.
Trying to do a device remove/rescan blocks the shell with an unkillable
task, while dmesg outputs this :
vfio-pci 0000:00:14.0: Relaying device request to user (#0)
vfio-pci 0000:00:14.0: Relaying device request to user (#10)
vfio-pci 0000:00:14.0: Relaying device request to user (#20)
vfio-pci 0000:00:14.0: Relaying device request to user (#30)
vfio-pci 0000:00:14.0: Relaying device request to user (#40)
vfio-pci 0000:00:14.0: Device is currently in use, task "bash" (2030)
blocked until device is released
Until I try to run that remove/rescan, the lspci still lists the device
with this entry, which goes away after that even though the operation
seemingly never completes :
00:14.0 USB controller [0c03]: Intel Corporation 7 Series/C210 Series
Chipset Family USB xHCI Host Controller [8086:1e31] (rev 04)
Subsystem: Micro-Star International Co., Ltd. [MSI] Device [1462:7758]
Kernel driver in use: xhci_hcd
Kernel modules: xhci_pci
It looks just the same when the controller is attached to the host, even
though none of what's plugged into it is listed by lsusb after I
shutdown the VM.
Can anyone tell me what's going on? I feel like I'm closing in on the
solution, but I'm really not sure where to go from here.
_______________________________________________
vfio-users mailing list
vfio-users@redhat.com
https://www.redhat.com/mailman/listinfo/vfio-users
