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 17config 64BIT 18 bool "64-bit kernel" if SUBARCH = "x86" 19 default SUBARCH != "i386" 20 21config X86_32 22 def_bool !64BIT 23 select HAVE_AOUT 24 select ARCH_WANT_IPC_PARSE_VERSION 25 select MODULES_USE_ELF_REL 26 select CLONE_BACKWARDS 27 select OLD_SIGSUSPEND3 28 select OLD_SIGACTION 29 30config X86_64 31 def_bool 64BIT 32 select MODULES_USE_ELF_RELA 33 34config RWSEM_XCHGADD_ALGORITHM 35 def_bool 64BIT 36 37config RWSEM_GENERIC_SPINLOCK 38 def_bool !RWSEM_XCHGADD_ALGORITHM 39 40config 3_LEVEL_PGTABLES 41 bool "Three-level pagetables" if !64BIT 42 default 64BIT 43 help 44 Three-level pagetables will let UML have more than 4G of physical 45 memory. All the memory that can't be mapped directly will be treated 46 as high memory. 47 48 However, this it experimental on 32-bit architectures, so if unsure say 49 N (on x86-64 it's automatically enabled, instead, as it's safe there). 50 51config ARCH_HAS_SC_SIGNALS 52 def_bool !64BIT 53 54config ARCH_REUSE_HOST_VSYSCALL_AREA 55 def_bool !64BIT 56 57config GENERIC_HWEIGHT 58 def_bool y 59 60source "arch/um/Kconfig.um" 61 62endmenu 63 64source "arch/um/Kconfig.rest" 65