Linux Kernel Module Cheat

Peter Maydell said potentially not possible nicely as of August 2018: https://stackoverflow.com/questions/51747744/how-to-run-a-qemu-monitor-command-from-inside-the-guest/51764110#51764110

It is also worth looking into the QEMU Guest Agent tool qemu-gq that can be enabled with:

See also: https://superuser.com/questions/930588/how-to-pass-commands-noninteractively-to-running-qemu-from-the-guest-qmp-via-te