config PAYLOAD_BUILD_GRUB2 bool if PAYLOAD_GRUB2 config PAYLOAD_FILE default "payloads/external/GRUB2/grub2/build/default_payload.elf" endif if PAYLOAD_BUILD_GRUB2 choice prompt "GRUB2 version" default GRUB2_STABLE config GRUB2_STABLE bool "2.12" help Stable GRUB2 version config GRUB2_MASTER bool "HEAD" help Newest GRUB2 version config GRUB2_REVISION bool "git revision" help Select this option if you have a specific commit or branch that you want to use as the revision from which to build GRUB2. You will be able to specify the name of a branch or a commit id later. endchoice config GRUB2_REVISION_ID string "Insert a commit's SHA-1 or a branch name" depends on GRUB2_REVISION default "origin/master" help The commit's SHA-1 or branch name of the revision to use. config GRUB2_EXTRA_MODULES string "Extra modules to include in GRUB image" help Space-separated list of additional modules to include. Few common ones: * bsd for *BSD * png/jpg for PNG/JPG images * gfxmenu for graphical menus (you'll need a theme as well) * gfxterm_background for setting background config GRUB2_INCLUDE_RUNTIME_CONFIG_FILE bool "Include GRUB2 runtime config file into ROM image" depends on PAYLOAD_BUILD_GRUB2 default n help The GRUB2 payload reads its runtime configuration file from etc/grub.cfg stored in the CBFS on the flash ROM chip. Without that, it’ll just drop into a rescue shell. This configuration may need to be coreboot specific. Select this option, if you want to include the GRUB2 runtime configuration file into CBFS as `etc/grub.cfg` automatically. You will be able to specify the path of the configuration file later. Without this option you would need to add this file manually with build/cbfstool build/coreboot.rom add -f grub.cfg -n etc/grub.cfg -t raw config GRUB2_RUNTIME_CONFIG_FILE string "Path of grub.cfg" depends on GRUB2_INCLUDE_RUNTIME_CONFIG_FILE default "grub.cfg" help The path of the GRUB2 runtime configuration file to be added to CBFS. endif if PAYLOAD_SEAGRUB config PAYLOAD_FILE default "payloads/external/SeaBIOS/seabios/out/bios.bin.elf" config SEABIOS_BOOTORDER_FILE default "payloads/external/GRUB2/bootorder-seagrub" config SEAGRUB_ALLOW_SEABIOS_BOOTMENU bool "Allow to access SeaBIOS boot menu before launching GRUB" help Enable this to allow the access to the boot menu of SeaBIOS. It increases the flexibility but allows to entirely bypass GRUB, along with all secure mechanism implemented in its runtime config. Please use this with caution. endif