[vfio-users] Unbind Vfio Passthrough = general protection fault

[Okky Hendriansyah]

Have you tried without -daemonize switch? I had issues when running with -daemonize. When I shutdown the VM and I immediately start the VM again using the same command, it complained about the devices aren't available to be assigned, forgot the real wording of it.

Then I tried to do without -daemonize. It took quite some time from the display got off after issuing shutdown from inside the VM to QEMU process finally exits to the Terminal again. So probably 1/10 of your attempts has the correct timing in unbinding the device when it is ready to be unbinded.

Best regards,
Okky Hendriansyah

> On Sep 22, 2015, at 05:46, nahoxou at netcourrier.com wrote:
> 
> 
>> Tell me please If need more detail information.
> 
> >What script or commands are you using to unbind the device?  Does only stopping the VM trigger the issue or is the unbind required? 
> 
> I put a sleep command between qemu stop and unbind so i think it is more about unbind...
> 
> I use the recommended command from all vfio web tutorials.
> bind:
> for dev in "0000:01:00.0" "0000:01:00.1"; do
>         vendor=$(cat /sys/bus/pci/devices/${dev}/vendor)
>         device=$(cat /sys/bus/pci/devices/${dev}/device)
>         if [ -e /sys/bus/pci/devices/${dev}/driver ]; then
>                 echo "${dev}" > /sys/bus/pci/devices/${dev}/driver/unbind
>         fi
>         echo "${vendor} ${device}" > /sys/bus/pci/drivers/vfio-pci/new_id
> done
> 
> 
> unbind :
> for dev in "0000:01:00.0" "0000:01:00.1"; do
>         vendor=$(cat /sys/bus/pci/devices/${dev}/vendor)
>         device=$(cat /sys/bus/pci/devices/${dev}/device)
>         if [ -e /sys/bus/pci/devices/${dev}/driver ]; then
>                 echo "${dev}" > /sys/bus/pci/devices/${dev}/driver/unbind
>         fi
> done
> 
> 
> Successful unbind command works rarely maybe 1/10 times.
> 
> 
> 
> 
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