[$] BPF for HID drivers

The Human
Interface Device (HID) standard dates back to the Windows 95 era.
It describes how devices like mice and keyboards present themselves to the
host computer, and has created a world where a single driver can handle a
wide variety of devices from multiple manufacturers. Or it would have, if
there weren't actual device manufacturers involved. In the real world,
devices stretch and break the standard, each in its own special way. At
the 2022 Linux Plumbers Conference,
Benjamin Tissoires described how BPF can be used to simplify the
task of supporting HID devices.