"default" watchdog device - ?

[lejeczek]

Hi guys.

Without explicitly, manually using watchdog device for a VM, 
the VM (centOS 8 Stream 4.18.0-365.el8.x86_64) shows 
'/dev/watchdog' exists.
To double check - 'dumpxml' does not show any such device - 
what kind of a 'watchdog' that is?
watchdog-5.15-2.el8.x86_64 on such a VM does not seem to do 
anything with it.

Host is centOS 9 with: qemu-img-6.2.0-11.el9.x86_64 
libvirt-daemon-8.0.0-5.el9.x86_64

many thanks, L.