1 mainmenu "User Mode Linux/$SUBARCH $KERNELVERSION Kernel Configuration" 2 3 source "arch/um/Kconfig.common" 4 5 menu "UML-specific options" 6 7 menu "Host processor type and features" 8 9 source "arch/x86/Kconfig.cpu" 10 11 endmenu 12 13 config UML_X86 14 def_bool y 15 select GENERIC_FIND_FIRST_BIT 16 17 config 64BIT 18 bool "64-bit kernel" if SUBARCH = "x86" 19 default SUBARCH != "i386" 20 21 config X86_32 22 def_bool !64BIT 23 select HAVE_AOUT 24 select ARCH_WANT_IPC_PARSE_VERSION 25 26 config X86_64 27 def_bool 64BIT 28 29 config RWSEM_XCHGADD_ALGORITHM 30 def_bool X86_XADD && 64BIT 31 32 config RWSEM_GENERIC_SPINLOCK 33 def_bool !RWSEM_XCHGADD_ALGORITHM 34 35 config 3_LEVEL_PGTABLES 36 bool "Three-level pagetables (EXPERIMENTAL)" if !64BIT 37 default 64BIT 38 depends on EXPERIMENTAL 39 help 40 Three-level pagetables will let UML have more than 4G of physical 41 memory. All the memory that can't be mapped directly will be treated 42 as high memory. 43 44 However, this it experimental on 32-bit architectures, so if unsure say 45 N (on x86-64 it's automatically enabled, instead, as it's safe there). 46 47 config ARCH_HAS_SC_SIGNALS 48 def_bool !64BIT 49 50 config ARCH_REUSE_HOST_VSYSCALL_AREA 51 def_bool !64BIT 52 53 config GENERIC_HWEIGHT 54 def_bool y 55 56 source "arch/um/Kconfig.um" 57 58 endmenu 59 60 source "arch/um/Kconfig.rest" 61