USB device emulation

[Tie-fighter]

Not really an issue/bug, but it would be really great to support Qubes OS.

I successfully installed and connected the client in a qube, but inputs do not get passed on correctly. (I also tried the sys-usb qube)
Qubes has some good documentation on the handling of USB devices, incl. external mice and keyboards, but I didn't find anthing on non-USB input devices.
Similarily I could not really figure out how Barrier passes the events on to the OS. I tried reading the source code but didn't get beyond the understanding that some form of IPC is used.

Maybe this is an documentation issue, maybe I am not knowledgeable enough about linux, maybe this should never work in the first place.
Either way I would really appreciate any hints/ideas/insights concerning this.

[Tie-fighter]

From my understanding Barrier uses PS/2 (interrupts) which do not get passed on to dom0.

A way to solve this issue would be to emulate usb devices which could be handled just like external peripherals in qubes.
Such a solution might prove useful in other usecases too.

Unfortunately implementing such a solution is beyond my current skill level.
Qubes thread: https://forum.qubes-os.org/t/synergy-barrier-support/5072