| EFI_HANDOVER_PROTOCOL | Support for the deprecated EFI handover protocol which defines alternative entry points into the EFI stub (which has not basis in the UEFI specification). Although the corresponding support is not present in upstream GRUB or other bootloaders, most distros build GRUB with downstream patches applied which rely on the handover protocol. See also EFI_MIXED. | 
  | EFI_MIXED | allows a 64-bit kernel to be booted on a 32-bit firmware (if CPU supported 64-bit mode). A mixed-mode enabled kernel cannot be booted via the EFI boot stub, though - a bootloader that supports the EFI handover protocol must be used. See also EFI_HANDOVER_PROTOCOL | 
  | EFI_STUB | allows bzImageto be loaded directly be EFI firmware without a bootloader. SeeDocumentation/admin-guide/efi-stub.rst. | 
  | EXPERT |  | 
  | FB | Frame buffer device (see also /dev/fbN) | 
  | HYPERV | Hyper-V client drivers | 
  | HZ,HZ_100etc. | include/asm-generic/param.hdefinesHZto the value ofCONFIG_HZand has the comment Internal kernel timer frequency. See alsokernel/Kconfig.hz | 
  | INPUT_EVDEV | Required for input device events to be accessible in /dev/input/eventX(which seems to be necessary for X Server ?) | 
  | PACKET | The packet protocol allows applications (such as tcpdump) to communicate directly with network devices withou an intermediate network protocol. Apparently,PACKETneeds to be enabled forwpa_supplicant. | 
  | X86,X86_32,X86_64,64BIT | What is the difference between X86_64and64BIT. |