grub: xen_hypervisor

 
 16.3.81 xen_hypervisor
 ----------------------
 
  -- Command: xen_hypervisor file [arguments] ...
      Load a Xen hypervisor binary from FILE.  The rest of the line is
      passed verbatim as the "kernel command-line".  Any other binaries
      must be reloaded after using this command.  This command is only
      available on AArch64 systems.