I know that we can login into the QMP shell and run "device_add driver=virtio-balloon-pci,help" and see if there is "free-page-reporting" option or not but Is there any other way to where we can check?
]$ sudo /venv/bin/qmp-shell -H /kvm/instances/Idak7va511eky8rkx/write-qemu/monitor-debug.sock
Welcome to the HMP shell!
Connected to QEMU 4.2.1
(QEMU) device_add driver=virtio-balloon-pci,help
virtio-balloon-pci options:
free-page-hint=<bool> - on/off
disable-legacy=<OnOffAuto> - on/off/auto
command_serr_enable=<bool> - on/off
guest-stats=<guest statistics>
deflate-on-oom=<bool> - on/off
free-page-reporting=<bool> - on/off