drivers/firmware/efi/libstub/efi-stub-helper.c
contains * Helper functions used by the EFI stub on multiple architectures*. efi_parse_options
parses the command line for options related to booting with EFI. [nokaslr][quiet][efi=…][video=efifb:…]
efi=
options (for example efi=nochunk,nosoftreserve
) nochunk
novamap
nosoftreserve
disable_early_pci_dma
no_disable_early_pci_dma
debug