1mainmenu "User Mode Linux/$SUBARCH $KERNELVERSION Kernel Configuration" 2 3source "arch/um/Kconfig.common" 4 5menu "UML-specific options" 6 7menu "Host processor type and features" 8 9source "arch/x86/Kconfig.cpu" 10 11endmenu 12 13config UML_X86 14 def_bool y 15 select GENERIC_FIND_FIRST_BIT 16 select GENERIC_SIGALTSTACK 17 18config 64BIT 19 bool "64-bit kernel" if SUBARCH = "x86" 20 default SUBARCH != "i386" 21 22config X86_32 23 def_bool !64BIT 24 select HAVE_AOUT 25 select ARCH_WANT_IPC_PARSE_VERSION 26 select MODULES_USE_ELF_REL 27 select CLONE_BACKWARDS 28 29config X86_64 30 def_bool 64BIT 31 select MODULES_USE_ELF_RELA 32 33config RWSEM_XCHGADD_ALGORITHM 34 def_bool 64BIT 35 36config RWSEM_GENERIC_SPINLOCK 37 def_bool !RWSEM_XCHGADD_ALGORITHM 38 39config 3_LEVEL_PGTABLES 40 bool "Three-level pagetables" if !64BIT 41 default 64BIT 42 help 43 Three-level pagetables will let UML have more than 4G of physical 44 memory. All the memory that can't be mapped directly will be treated 45 as high memory. 46 47 However, this it experimental on 32-bit architectures, so if unsure say 48 N (on x86-64 it's automatically enabled, instead, as it's safe there). 49 50config ARCH_HAS_SC_SIGNALS 51 def_bool !64BIT 52 53config ARCH_REUSE_HOST_VSYSCALL_AREA 54 def_bool !64BIT 55 56config GENERIC_HWEIGHT 57 def_bool y 58 59source "arch/um/Kconfig.um" 60 61endmenu 62 63source "arch/um/Kconfig.rest" 64