## ## This file is part of the coreboot project. ## ## Copyright (C) 2012 Alexandru Gagniuc ## Copyright (C) 2009-2010 coresystems GmbH ## ## This program is free software; you can redistribute it and/or modify ## it under the terms of the GNU General Public License as published by ## the Free Software Foundation; version 2 of the License. ## ## This program is distributed in the hope that it will be useful, ## but WITHOUT ANY WARRANTY; without even the implied warranty of ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ## GNU General Public License for more details. ## ## You should have received a copy of the GNU General Public License ## along with this program; if not, write to the Free Software ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA ## mainmenu "coreboot configuration" menu "General setup" config EXPERT bool "Expert mode" help This allows you to select certain advanced configuration options. Warning: Only enable this option if you really know what you are doing! You have been warned! config LOCALVERSION string "Local version string" help Append an extra string to the end of the coreboot version. This can be useful if, for instance, you want to append the respective board's hostname or some other identifying string to the coreboot version number, so that you can easily distinguish boot logs of different boards from each other. config CBFS_PREFIX string "CBFS prefix to use" default "fallback" help Select the prefix to all files put into the image. It's "fallback" by default, "normal" is a common alternative. config ALT_CBFS_LOAD_PAYLOAD bool "Use alternative cbfs_load_payload() implementation." default n help Either board or southbridge provide an alternative cbfs_load_payload() implementation. This may be used, for example, if accessing the ROM through memory-mapped I/O is slow and a faster alternative can be provided. choice prompt "Compiler to use" default COMPILER_GCC help This option allows you to select the compiler used for building coreboot. config COMPILER_GCC bool "GCC" help Use the GNU Compiler Collection (GCC) to build coreboot. For details see http://gcc.gnu.org. config COMPILER_LLVM_CLANG bool "LLVM/clang" help Use LLVM/clang to build coreboot. For details see http://clang.llvm.org. endchoice config SCANBUILD_ENABLE bool "Build with scan-build for static code analysis" default n help Changes the build process to use scan-build (a utility for running the clang static code analyzer from the command line). Requires the scan-build utility in your system $PATH. For details see http://clang-analyzer.llvm.org/scan-build.html. config SCANBUILD_REPORT_LOCATION string "Directory for the scan-build report(s)" default "" depends on SCANBUILD_ENABLE help Directory where the scan-build reports should be stored in. The reports are stored in subdirectories of the form 'yyyy-mm-dd-*' in the specified directory. If this setting is left empty, the coreboot top-level directory will be used to store the report subdirectories. config CCACHE bool "Use ccache to speed up (re)compilation" default n help Enables the use of ccache for faster builds. Requires the ccache utility in your system $PATH. For details see https://ccache.samba.org. config SCONFIG_GENPARSER bool "Generate SCONFIG parser using flex and bison" default n depends on EXPERT help Enable this option if you are working on the sconfig device tree parser and made changes to sconfig.l and sconfig.y. Otherwise, say N. config USE_OPTION_TABLE bool "Use CMOS for configuration values" default n depends on HAVE_OPTION_TABLE help Enable this option if coreboot shall read options from the "CMOS" NVRAM instead of using hard-coded values. config COMPRESS_RAMSTAGE bool "Compress ramstage with LZMA" default y help Compress ramstage to save memory in the flash image. Note that decompression might slow down booting if the boot flash is connected through a slow link (i.e. SPI). config INCLUDE_CONFIG_FILE bool "Include the coreboot .config file into the ROM image" default y help Include the .config file that was used to compile coreboot in the (CBFS) ROM image. This is useful if you want to know which options were used to build a specific coreboot.rom image. Saying Y here will increase the image size by 2-3kB. You can use the following command to easily list the options: grep -a CONFIG_ coreboot.rom Alternatively, you can also use cbfstool to print the image contents (including the raw 'config' item we're looking for). Example: $ cbfstool coreboot.rom print coreboot.rom: 4096 kB, bootblocksize 1008, romsize 4194304, offset 0x0 Alignment: 64 bytes Name Offset Type Size cmos_layout.bin 0x0 cmos layout 1159 fallback/romstage 0x4c0 stage 339756 fallback/coreboot_ram 0x53440 stage 186664 fallback/payload 0x80dc0 payload 51526 config 0x8d740 raw 3324 (empty) 0x8e480 null 3610440 config EARLY_CBMEM_INIT bool default n help Make coreboot initialize the CBMEM structures while running in ROM stage. This is useful when the ROM stage wants to communicate some, for instance, execution timestamps. It needs support in romstage.c and should be enabled by the board's Kconfig. config DYNAMIC_CBMEM bool "The CBMEM space is dynamically grown." default n select EARLY_CBMEM_INIT help Instead of reserving a static amount of CBMEM space the CBMEM area grows dynamically. CBMEM can be used both in romstage (after memory initialization) and ramstage. config COLLECT_TIMESTAMPS bool "Create a table of timestamps collected during boot" default n help Make coreboot create a table of timer-ID/timer-value pairs to allow measuring time spent at different phases of the boot process. config USE_BLOBS bool "Allow use of binary-only repository" default n help This draws in the blobs repository, which contains binary files that might be required for some chipsets or boards. This flag ensures that a "Free" option remains available for users. config COVERAGE bool "Code coverage support" depends on COMPILER_GCC default n help Add code coverage support for coreboot. This will store code coverage information in CBMEM for extraction from user space. If unsure, say N. endmenu source src/mainboard/Kconfig # This option is used to set the architecture of a mainboard to X86. # It is usually set in mainboard/*/Kconfig. config ARCH_X86 bool default n select PCI config ARCH_ARMV7 bool default n # Warning: The file is included whether or not the if is here. # but the if controls how the evaluation occurs. if ARCH_X86 source src/arch/x86/Kconfig endif if ARCH_ARMV7 source src/arch/armv7/Kconfig endif config HAVE_ARCH_MEMSET bool default n config HAVE_ARCH_MEMCPY bool default n config HAVE_ARCH_MEMMOVE bool default n menu "Chipset" comment "CPU" source src/cpu/Kconfig comment "Northbridge" source src/northbridge/Kconfig comment "Southbridge" source src/southbridge/Kconfig comment "Super I/O" source src/superio/Kconfig comment "Embedded Controllers" source src/ec/Kconfig endmenu source src/device/Kconfig menu "Generic Drivers" source src/drivers/Kconfig endmenu config HEAP_SIZE hex default 0x4000 config MAX_CPUS int default 1 config MMCONF_SUPPORT_DEFAULT bool default n config MMCONF_SUPPORT bool default n source src/console/Kconfig # This should default to N and be set by SuperI/O drivers that have an UART config HAVE_UART_IO_MAPPED bool default y if ARCH_X86 default n if ARCH_ARMV7 config HAVE_UART_MEMORY_MAPPED bool default n config HAVE_UART_SPECIAL bool default n config HAVE_ACPI_RESUME bool default n config HAVE_ACPI_SLIC bool default n config ACPI_SSDTX_NUM int default 0 config HAVE_HARD_RESET bool default n help This variable specifies whether a given board has a hard_reset function, no matter if it's provided by board code or chipset code. config HAVE_INIT_TIMER bool default n if UDELAY_IO default y config HAVE_MONOTONIC_TIMER def_bool n help The board/chipset provides a monotonic timer. config TIMER_QUEUE def_bool n depends on HAVE_MONOTONIC_TIMER help Provide a timer queue for performing time-based callbacks. config COOP_MULTITASKING def_bool n depends on TIMER_QUEUE && ARCH_X86 help Cooperative multitasking allows callbacks to be multiplexed on the main thread of ramstage. With this enabled it allows for multiple execution paths to take place when they have udelay() calls within their code. config NUM_THREADS int default 4 depends on COOP_MULTITASKING help How many execution threads to cooperatively multitask with. config HIGH_SCRATCH_MEMORY_SIZE hex default 0x0 config HAVE_OPTION_TABLE bool default n help This variable specifies whether a given board has a cmos.layout file containing NVRAM/CMOS bit definitions. It defaults to 'n' but can be selected in mainboard/*/Kconfig. config PIRQ_ROUTE bool default n config HAVE_SMI_HANDLER bool default n config PCI_IO_CFG_EXT bool default n config IOAPIC bool default n config CBFS_SIZE hex default ROM_SIZE config CACHE_ROM_SIZE_OVERRIDE hex default 0 # TODO: Can probably be removed once all chipsets have kconfig options for it. config VIDEO_MB int default 0 config USE_WATCHDOG_ON_BOOT bool default n config VGA bool default n help Build board-specific VGA code. config GFXUMA bool default n help Enable Unified Memory Architecture for graphics. config RELOCATABLE_MODULES bool "Relocatable Modules" default n help If RELOCATABLE_MODULES is selected then support is enabled for building relocatable modules in the ram stage. Those modules can be loaded anywhere and all the relocations are handled automatically. config RELOCATABLE_RAMSTAGE depends on (RELOCATABLE_MODULES && DYNAMIC_CBMEM) bool "Build the ramstage to be relocatable in 32-bit address space." default n help The reloctable ramstage support allows for the ramstage to be built as a relocatable module. The stage loader can identify a place out of the OS way so that copying memory is unnecessary during an S3 wake. When selecting this option the romstage is responsible for determing a stack location to use for loading the ramstage. config HAVE_REFCODE_BLOB depends on ARCH_X86 bool "An external reference code blob should be put into cbfs." default n help The reference code blob will be placed into cbfs. if HAVE_REFCODE_BLOB config REFCODE_BLOB_FILE string "Path and filename to reference code blob." default "refcode.elf" help The path and filename to the file to be added to cbfs. endif # HAVE_REFCODE_BLOB config HAVE_ACPI_TABLES bool help This variable specifies whether a given board has ACPI table support. It is usually set in mainboard/*/Kconfig. Whether or not the ACPI tables are actually generated by coreboot is configurable by the user via GENERATE_ACPI_TABLES. config HAVE_MP_TABLE bool help This variable specifies whether a given board has MP table support. It is usually set in mainboard/*/Kconfig. Whether or not the MP table is actually generated by coreboot is configurable by the user via GENERATE_MP_TABLE. config HAVE_PIRQ_TABLE bool help This variable specifies whether a given board has PIRQ table support. It is usually set in mainboard/*/Kconfig. Whether or not the PIRQ table is actually generated by coreboot is configurable by the user via GENERATE_PIRQ_TABLE. config MAX_PIRQ_LINKS int default 4 help This variable specifies the number of PIRQ interrupt links which are routable. On most chipsets, this is 4, INTA through INTD. Some chipsets offer more than four links, commonly up to INTH. They may also have a separate link for ATA or IOAPIC interrupts. When the PIRQ table specifies links greater than 4, pirq_route_irqs will not function properly, unless this variable is correctly set. #These Options are here to avoid "undefined" warnings. #The actual selection and help texts are in the following menu. menu "System tables" config GENERATE_ACPI_TABLES prompt "Generate ACPI tables" if HAVE_ACPI_TABLES bool default HAVE_ACPI_TABLES help Generate ACPI tables for this board. If unsure, say Y. config GENERATE_MP_TABLE prompt "Generate an MP table" if HAVE_MP_TABLE || DRIVERS_GENERIC_IOAPIC bool default HAVE_MP_TABLE || DRIVERS_GENERIC_IOAPIC help Generate an MP table (conforming to the Intel MultiProcessor specification 1.4) for this board. If unsure, say Y. config GENERATE_PIRQ_TABLE prompt "Generate a PIRQ table" if HAVE_PIRQ_TABLE bool default HAVE_PIRQ_TABLE help Generate a PIRQ table for this board. If unsure, say Y. config GENERATE_SMBIOS_TABLES depends on ARCH_X86 bool "Generate SMBIOS tables" default y help Generate SMBIOS tables for this board. If unsure, say Y. endmenu menu "Payload" choice prompt "Add a payload" default PAYLOAD_NONE if !ARCH_X86 default PAYLOAD_SEABIOS if ARCH_X86 config PAYLOAD_NONE bool "None" help Select this option if you want to create an "empty" coreboot ROM image for a certain mainboard, i.e. a coreboot ROM image which does not yet contain a payload. For such an image to be useful, you have to use 'cbfstool' to add a payload to the ROM image later. config PAYLOAD_ELF bool "An ELF executable payload" help Select this option if you have a payload image (an ELF file) which coreboot should run as soon as the basic hardware initialization is completed. You will be able to specify the location and file name of the payload image later. config PAYLOAD_LINUX bool "A Linux payload" help Select this option if you have a Linux bzImage which coreboot should run as soon as the basic hardware initialization is completed. You will be able to specify the location and file name of the payload image later. config PAYLOAD_SEABIOS bool "SeaBIOS" depends on ARCH_X86 help Select this option if you want to build a coreboot image with a SeaBIOS payload. If you don't know what this is about, just leave it enabled. See http://coreboot.org/Payloads for more information. config PAYLOAD_FILO bool "FILO" help Select this option if you want to build a coreboot image with a FILO payload. If you don't know what this is about, just leave it enabled. See http://coreboot.org/Payloads for more information. config PAYLOAD_GRUB2 bool "GRUB2" help Select this option if you want to build a coreboot image with a GRUB2 payload. If you don't know what this is about, just leave it enabled. See http://coreboot.org/Payloads for more information. config PAYLOAD_TIANOCORE bool "Tiano Core" help Select this option if you want to build a coreboot image with a Tiano Core payload. If you don't know what this is about, just leave it enabled. See http://coreboot.org/Payloads for more information. endchoice choice prompt "SeaBIOS version" default SEABIOS_STABLE depends on PAYLOAD_SEABIOS config SEABIOS_STABLE bool "1.7.2.1" help Stable SeaBIOS version config SEABIOS_MASTER bool "master" help Newest SeaBIOS version endchoice config SEABIOS_PS2_TIMEOUT prompt "PS/2 keyboard controller initialization timeout (milliseconds)" if PAYLOAD_SEABIOS default 0 depends on EXPERT int help Some PS/2 keyboard controllers don't respond to commands immediately after powering on. This specifies how long SeaBIOS will wait for the keyboard controller to become ready before giving up. choice prompt "GRUB2 version" default GRUB2_MASTER depends on PAYLOAD_GRUB2 config GRUB2_MASTER bool "HEAD" help Newest GRUB2 version endchoice choice prompt "FILO version" default FILO_STABLE depends on PAYLOAD_FILO config FILO_STABLE bool "0.6.0" help Stable FILO version config FILO_MASTER bool "HEAD" help Newest FILO version endchoice config PAYLOAD_FILE string "Payload path and filename" depends on PAYLOAD_ELF default "payload.elf" help The path and filename of the ELF executable file to use as payload. config PAYLOAD_FILE string "Linux path and filename" depends on PAYLOAD_LINUX default "bzImage" help The path and filename of the bzImage kernel to use as payload. config PAYLOAD_FILE depends on PAYLOAD_SEABIOS default "$(obj)/seabios/out/bios.bin.elf" config PAYLOAD_FILE depends on PAYLOAD_FILO default "payloads/external/FILO/filo/build/filo.elf" config PAYLOAD_FILE depends on PAYLOAD_GRUB2 default "payloads/external/GRUB2/grub2/build/default_payload.elf" config PAYLOAD_FILE string "Tianocore firmware volume" depends on PAYLOAD_TIANOCORE default "COREBOOT.fd" help The result of a corebootPkg build # TODO: Defined if no payload? Breaks build? config COMPRESSED_PAYLOAD_LZMA bool "Use LZMA compression for payloads" default y depends on PAYLOAD_ELF || PAYLOAD_SEABIOS || PAYLOAD_FILO || PAYLOAD_TIANOCORE || PAYLOAD_GRUB2 help In order to reduce the size payloads take up in the ROM chip coreboot can compress them using the LZMA algorithm. config LINUX_COMMAND_LINE string "Linux command line" depends on PAYLOAD_LINUX default "" help A command line to add to the Linux kernel. config LINUX_INITRD string "Linux initrd" depends on PAYLOAD_LINUX default "" help An initrd image to add to the Linux kernel. endmenu menu "Debugging" # TODO: Better help text and detailed instructions. config GDB_STUB bool "GDB debugging support" default n help If enabled, you will be able to set breakpoints for gdb debugging. See src/arch/x86/lib/c_start.S for details. config GDB_WAIT bool "Wait for a GDB connection" default n depends on GDB_STUB help If enabled, coreboot will wait for a GDB connection. config DEBUG_CBFS bool "Output verbose CBFS debug messages" default n help This option enables additional CBFS related debug messages. config HAVE_DEBUG_RAM_SETUP def_bool n config DEBUG_RAM_SETUP bool "Output verbose RAM init debug messages" default n depends on HAVE_DEBUG_RAM_SETUP help This option enables additional RAM init related debug messages. It is recommended to enable this when debugging issues on your board which might be RAM init related. Note: This option will increase the size of the coreboot image. If unsure, say N. config HAVE_DEBUG_CAR def_bool n config DEBUG_CAR def_bool n depends on HAVE_DEBUG_CAR if DEFAULT_CONSOLE_LOGLEVEL_7 || DEFAULT_CONSOLE_LOGLEVEL_8 # Only visible if debug level is DEBUG (7) or SPEW (8) as it does additional # printk(BIOS_DEBUG, ...) calls. config DEBUG_CAR bool "Output verbose Cache-as-RAM debug messages" default n depends on HAVE_DEBUG_CAR help This option enables additional CAR related debug messages. endif config DEBUG_PIRQ bool "Check PIRQ table consistency" default n depends on GENERATE_PIRQ_TABLE help If unsure, say N. config HAVE_DEBUG_SMBUS def_bool n config DEBUG_SMBUS bool "Output verbose SMBus debug messages" default n depends on HAVE_DEBUG_SMBUS help This option enables additional SMBus (and SPD) debug messages. Note: This option will increase the size of the coreboot image. If unsure, say N. config DEBUG_SMI bool "Output verbose SMI debug messages" default n depends on HAVE_SMI_HANDLER help This option enables additional SMI related debug messages. Note: This option will increase the size of the coreboot image. If unsure, say N. config DEBUG_SMM_RELOCATION bool "Debug SMM relocation code" default n depends on HAVE_SMI_HANDLER help This option enables additional SMM handler relocation related debug messages. Note: This option will increase the size of the coreboot image. If unsure, say N. # Only visible if debug level is DEBUG (7) or SPEW (8) as it does additional # printk(BIOS_DEBUG, ...) calls. config DEBUG_MALLOC prompt "Output verbose malloc debug messages" if DEFAULT_CONSOLE_LOGLEVEL_7 || DEFAULT_CONSOLE_LOGLEVEL_8 bool default n help This option enables additional malloc related debug messages. Note: This option will increase the size of the coreboot image. If unsure, say N. # Only visible if debug level is DEBUG (7) or SPEW (8) as it does additional # printk(BIOS_DEBUG, ...) calls. config DEBUG_ACPI prompt "Output verbose ACPI debug messages" if DEFAULT_CONSOLE_LOGLEVEL_7 || DEFAULT_CONSOLE_LOGLEVEL_8 bool default n help This option enables additional ACPI related debug messages. Note: This option will slightly increase the size of the coreboot image. If unsure, say N. # Only visible if debug level is DEBUG (7) or SPEW (8) as it does additional # printk(BIOS_DEBUG, ...) calls. config REALMODE_DEBUG prompt "Enable debug messages for option ROM execution" if DEFAULT_CONSOLE_LOGLEVEL_7 || DEFAULT_CONSOLE_LOGLEVEL_8 bool default n depends on PCI_OPTION_ROM_RUN_REALMODE help This option enables additional x86emu related debug messages. Note: This option will increase the time to emulate a ROM. If unsure, say N. config X86EMU_DEBUG bool "Output verbose x86emu debug messages" default n depends on PCI_OPTION_ROM_RUN_YABEL help This option enables additional x86emu related debug messages. Note: This option will increase the size of the coreboot image. If unsure, say N. config X86EMU_DEBUG_JMP bool "Trace JMP/RETF" default n depends on X86EMU_DEBUG help Print information about JMP and RETF opcodes from x86emu. Note: This option will increase the size of the coreboot image. If unsure, say N. config X86EMU_DEBUG_TRACE bool "Trace all opcodes" default n depends on X86EMU_DEBUG help Print _all_ opcodes that are executed by x86emu. WARNING: This will produce a LOT of output and take a long time. Note: This option will increase the size of the coreboot image. If unsure, say N. config X86EMU_DEBUG_PNP bool "Log Plug&Play accesses" default n depends on X86EMU_DEBUG help Print Plug And Play accesses made by option ROMs. Note: This option will increase the size of the coreboot image. If unsure, say N. config X86EMU_DEBUG_DISK bool "Log Disk I/O" default n depends on X86EMU_DEBUG help Print Disk I/O related messages. Note: This option will increase the size of the coreboot image. If unsure, say N. config X86EMU_DEBUG_PMM bool "Log PMM" default n depends on X86EMU_DEBUG help Print messages related to POST Memory Manager (PMM). Note: This option will increase the size of the coreboot image. If unsure, say N. config X86EMU_DEBUG_VBE bool "Debug VESA BIOS Extensions" default n depends on X86EMU_DEBUG help Print messages related to VESA BIOS Extension (VBE) functions. Note: This option will increase the size of the coreboot image. If unsure, say N. config X86EMU_DEBUG_INT10 bool "Redirect INT10 output to console" default n depends on X86EMU_DEBUG help Let INT10 (i.e. character output) calls print messages to debug output. Note: This option will increase the size of the coreboot image. If unsure, say N. config X86EMU_DEBUG_INTERRUPTS bool "Log intXX calls" default n depends on X86EMU_DEBUG help Print messages related to interrupt handling. Note: This option will increase the size of the coreboot image. If unsure, say N. config X86EMU_DEBUG_CHECK_VMEM_ACCESS bool "Log special memory accesses" default n depends on X86EMU_DEBUG help Print messages related to accesses to certain areas of the virtual memory (e.g. BDA (BIOS Data Area) or interrupt vectors) Note: This option will increase the size of the coreboot image. If unsure, say N. config X86EMU_DEBUG_MEM bool "Log all memory accesses" default n depends on X86EMU_DEBUG help Print memory accesses made by option ROM. Note: This also includes accesses to fetch instructions. Note: This option will increase the size of the coreboot image. If unsure, say N. config X86EMU_DEBUG_IO bool "Log IO accesses" default n depends on X86EMU_DEBUG help Print I/O accesses made by option ROM. Note: This option will increase the size of the coreboot image. If unsure, say N. config X86EMU_DEBUG_TIMINGS bool "Output timing information" default n depends on X86EMU_DEBUG && UDELAY_LAPIC && HAVE_MONOTONIC_TIMER help Print timing information needed by i915tool. If unsure, say N. config DEBUG_TPM bool "Output verbose TPM debug messages" default n depends on TPM help This option enables additional TPM related debug messages. config DEBUG_SPI_FLASH bool "Output verbose SPI flash debug messages" default n depends on SPI_FLASH help This option enables additional SPI flash related debug messages. config DEBUG_USBDEBUG bool "Output verbose USB 2.0 EHCI debug dongle messages" default n depends on USBDEBUG help This option enables additional USB 2.0 debug dongle related messages. Select this to debug the connection of usbdebug dongle. Note that you need some other working console to receive the messages. if SOUTHBRIDGE_INTEL_BD82X6X && DEFAULT_CONSOLE_LOGLEVEL_8 # Only visible with the right southbridge and loglevel. config DEBUG_INTEL_ME bool "Verbose logging for Intel Management Engine" default n help Enable verbose logging for Intel Management Engine driver that is present on Intel 6-series chipsets. endif config TRACE bool "Trace function calls" default n help If enabled, every function will print information to console once the function is entered. The syntax is ~0xaaaabbbb(0xccccdddd) the 0xaaaabbbb is the actual function and 0xccccdddd is EIP of calling function. Please note some printk releated functions are omitted from trace to have good looking console dumps. config DEBUG_COVERAGE bool "Debug code coverage" default n depends on COVERAGE help If enabled, the code coverage hooks in coreboot will output some information about the coverage data that is dumped. endmenu # These probably belong somewhere else, but they are needed somewhere. config ENABLE_APIC_EXT_ID bool default n config WARNINGS_ARE_ERRORS bool default y # The four POWER_BUTTON_DEFAULT_ENABLE, POWER_BUTTON_DEFAULT_DISABLE, # POWER_BUTTON_FORCE_ENABLE and POWER_BUTTON_FORCE_DISABLE options are # mutually exclusive. One of these options must be selected in the # mainboard Kconfig if the chipset supports enabling and disabling of # the power button. Chipset code uses the ENABLE_POWER_BUTTON option set # in mainboard/Kconfig to know if the button should be enabled or not. config POWER_BUTTON_DEFAULT_ENABLE def_bool n help Select when the board has a power button which can optionally be disabled by the user. config POWER_BUTTON_DEFAULT_DISABLE def_bool n help Select when the board has a power button which can optionally be enabled by the user, e.g. when the board ships with a jumper over the power switch contacts. config POWER_BUTTON_FORCE_ENABLE def_bool n help Select when the board requires that the power button is always enabled. config POWER_BUTTON_FORCE_DISABLE def_bool n help Select when the board requires that the power button is always disabled, e.g. when it has been hardwired to ground. config POWER_BUTTON_IS_OPTIONAL bool default y if POWER_BUTTON_DEFAULT_ENABLE || POWER_BUTTON_DEFAULT_DISABLE default n if !(POWER_BUTTON_DEFAULT_ENABLE || POWER_BUTTON_DEFAULT_DISABLE) help Internal option that controls ENABLE_POWER_BUTTON visibility. source src/vendorcode/Kconfig