menu "Architecture-specific options" config 64BITS bool "64-bits kernel" if ARCH = "x86" default ARCH != "i386" ---help--- Build a 64-bits kernel. config X86_PAE bool "Enable PAE (Physical Address Extension)" depends on X86_32 ---help--- PAE allows addressing physical memory beyond 4 GiB at the cost of more pagetable lookup and memory overhead. endmenu config X86_32 def_bool y depends on !64BITS config X86_64 def_bool y depends on 64BITS config X86 def_bool y config SUBARCH string default "i386" if X86_32 default "amd64" if X86_64