Pass a string to a guest as though the string had been entered from the command line
cmdline commandline
You can pass the string specified by commandline to a Linux kernel or to multiboot (ELF) images used for QNX guests.
The cmdline option makes command-line input available to the guest in various ways, depending on the guest image format and the guest architecture. How the input is interpreted is the responsibility of the guest.
The following connects a terminal console and sets up log and debug parameters for a Linux guest running on a virtualized ARM platform:
cmdline "console=ttyAMA0 earlycon=pl011,0x1c090000 \ debug user_debug=31 loglevel=9"