1 # SPDX-License-Identifier: GPL-2.0 2 mainmenu "User Mode Linux/$SUBARCH $KERNELVERSION Kernel Configuration" 3 4 source "arch/um/Kconfig.common" 5 6 menu "UML-specific options" 7 8 menu "Host processor type and features" 9 10 source "arch/x86/Kconfig.cpu" 11 12 endmenu 13 14 config UML_X86 15 def_bool y 16 select GENERIC_FIND_FIRST_BIT 17 18 config 64BIT 19 bool "64-bit kernel" if SUBARCH = "x86" 20 default SUBARCH != "i386" 21 22 config 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 select OLD_SIGSUSPEND3 29 select OLD_SIGACTION 30 31 config X86_64 32 def_bool 64BIT 33 select MODULES_USE_ELF_RELA 34 35 config ARCH_DEFCONFIG 36 string 37 default "arch/um/configs/i386_defconfig" if X86_32 38 default "arch/um/configs/x86_64_defconfig" if X86_64 39 40 config RWSEM_XCHGADD_ALGORITHM 41 def_bool 64BIT 42 43 config RWSEM_GENERIC_SPINLOCK 44 def_bool !RWSEM_XCHGADD_ALGORITHM 45 46 config 3_LEVEL_PGTABLES 47 bool "Three-level pagetables" if !64BIT 48 default 64BIT 49 help 50 Three-level pagetables will let UML have more than 4G of physical 51 memory. All the memory that can't be mapped directly will be treated 52 as high memory. 53 54 However, this it experimental on 32-bit architectures, so if unsure say 55 N (on x86-64 it's automatically enabled, instead, as it's safe there). 56 57 config ARCH_HAS_SC_SIGNALS 58 def_bool !64BIT 59 60 config ARCH_REUSE_HOST_VSYSCALL_AREA 61 def_bool !64BIT 62 63 config GENERIC_HWEIGHT 64 def_bool y 65 66 source "arch/um/Kconfig.um" 67 68 endmenu 69 70 source "arch/um/Kconfig.rest" 71