There is a problem with the pci pass-through

[u-watanabe]

TrueNAS-SCALE-22.12.3.3
ASUS H170-PRO / Core i5-6500 CPU / 16GB RAM
PCI-Express Slot 1 : DELL PERC H310 SAS adapter
PCI Slot 1 : Earthsoft PT2 (Tv Tuner board)

03:01.0 Multimedia controller: Xilinx Corporation Device 222a (rev 01)

I want to pass through this device to a virtual machine Ubuntu Desktop 22.04.2

lspci result

When I add this device to the virtual machine and boot it, I get the following error message

[EFAULT] internal error: qemu unexpectedly closed the monitor: 2023-08-15T14:11:28.613474Z
qemu-system-x86_64: -device vfio-pci,host=0000:03:01.0,id=hostdev0,bus=pci.0,addr=0x7:
vfio 0000:03:01.0: Failed to set up TRIGGER eventfd signaling for interrupt INTX-0: VFIO_DEVICE_SET_IRQS failure:Invalid argument

More info...
Error: Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/middlewared/plugins/vm/supervisor/supervisor.py", line 172, in start
if self.domain.create() < 0:
File "/usr/lib/python3/dist-packages/libvirt.py", line 1353, in create
raise libvirtError('virDomainCreate() failed')
libvirt.libvirtError: internal error: qemu unexpectedly closed the monitor: 2023-08-15T14:11:28.613474Z qemu-system-x86_64: -device vfio-pci,host=0000:03:01.0,id=hostdev0,bus=pci.0,addr=0x7: vfio 0000:03:01.0: Failed to set up TRIGGER eventfd signaling for interrupt INTX-0: VFIO_DEVICE_SET_IRQS failure: Invalid argument

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/middlewared/main.py", line 204, in call_method
result = await self.middleware._call(message['method'], serviceobj, methodobj, params, app=self)
File "/usr/lib/python3/dist-packages/middlewared/main.py", line 1344, in _call
return await methodobj(*prepared_call.args)
File "/usr/lib/python3/dist-packages/middlewared/schema.py", line 1378, in nf
return await func(*args, **kwargs)
File "/usr/lib/python3/dist-packages/middlewared/schema.py", line 1246, in nf
res = await f(*args, **kwargs)
File "/usr/lib/python3/dist-packages/middlewared/plugins/vm/vm_lifecycle.py", line 46, in start
await self.middleware.run_in_thread(self._start, vm['name'])
File "/usr/lib/python3/dist-packages/middlewared/main.py", line 1261, in run_in_thread
return await self.run_in_executor(self.thread_pool_executor, method, *args, **kwargs)
File "/usr/lib/python3/dist-packages/middlewared/main.py", line 1258, in run_in_executor
return await loop.run_in_executor(pool, functools.partial(method, *args, **kwargs))
File "/usr/lib/python3.9/concurrent/futures/thread.py", line 52, in run
result = self.fn(*self.args, **self.kwargs)
File "/usr/lib/python3/dist-packages/middlewared/plugins/vm/vm_supervisor.py", line 68, in _start
self.vms[vm_name].start(vm_data=self._vm_from_name(vm_name))
File "/usr/lib/python3/dist-packages/middlewared/plugins/vm/supervisor/supervisor.py", line 181, in start
raise CallError('\n'.join(errors))
middlewared.service_exception.CallError: [EFAULT] internal error: qemu unexpectedly closed the monitor: 2023-08-15T14:11:28.613474Z qemu-system-x86_64: -device vfio-pci,host=0000:03:01.0,id=hostdev0,bus=pci.0,addr=0x7: vfio 0000:03:01.0: Failed to set up TRIGGER eventfd signaling for interrupt INTX-0: VFIO_DEVICE_SET_IRQS failure: Invalid argument

Do you have any tips on how to solve the problem? Best regards.

 

[sretalla]

Do you have any tips on how to solve the problem? Best regards.

I think I've seen a similar problem with multiple-port network cards... basically the address used in the passthrough statement (the way that TrueNAS formulates it) is too specific and needs to drop the last digit

vfio 0000:03:01.0

needs to be something like vfio 0000:03:01 instead... probably the host= part too.

Problem will be that TrueNAS doesn't allow such a change, so you'll need to do something like running virt-manager against TrueNAS with at least one VM running and see if you can mess with it.

If you do get it fixed, the fix will not survive a reboot, so that will be annoying.

Also, my guess at the problem may or may not be right, so there's that too.