The Kconfig* files

The Kconfig file at the root of the kernel source tree is used to fill in the initial screen of the menuconfig UI. Take a look at it if you wish. It works by sourcing various other Kconfig files in different folders of the kernel source tree. The following table summarizes the more important Kconfig* files and which menu they serve in the kbuild UI:

Menu	Kconfig file location for it
The main menu, the initial screen	Kconfig
General setup + Enable loadable module support	init/Kconfig
Processor types and features + Bus options + Binary Emulations (arch-specific; above the menu title is for x86; in general, the Kconfig file is here: arch/<arch>/Kconfig)	arch/<arch>/Kconfig
Power management	kernel/power/Kconfig
Firmware drivers	drivers/firmware/Kconfig
Virtualization	arch/<arch>/kvm/Kconfig
General architecture-dependent options	arch/Kconfig
Enable the block layer + IO Schedulers	block/Kconfig
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