[libvirt] qemu: domain notification for serial channel changes

Hi, I was in the process of implementing a custom qemu agent which communicates over virtio-serial channels, when I noticed that the only way to receive channel state change notifications was to poll the domstatus XML file. There does seem to be code in libvirt to monitor for serial change events (https://libvirt.org/git/?p=libvirt.git;a=blob;f=src/qemu/qemu_driver.c;h=...), however it's hardcoded/specific to the qemu-ga (explicitly checking for ports named "org.qemu.guest_agent.0"). It occurs to me that while there was a class of events added for guest lifecycle changes, it might be a more generic solution to provide events for character device changes. Am I missing some existing functionality here? I'm a first-time poster here so I was hoping to both signal my intent to implement something more generic, as well as ping the community to see if there would be interest in this work or reasons why I shouldn't be doing this. Regards, Matt