libvirt users - Sep 2018 - Save VGA console log

Hi everyone,

Currently I boot my guest through VGA as

LABEL vga
        KERNEL vmlinuz
        APPEND initrd=initrd console=tty0 rootfstype=ramfs

If I boot through VGA tty0, is there any way to modify libvirt xml config that
when a user type command "reboot" in VGA console, I can log all
messages types from user in "console", could you please help?

Thanks a lot
Brs,
Naruto