1# SPDX-License-Identifier: GPL-2.0 2mainmenu "User Mode Linux/$(SUBARCH) $(KERNELVERSION) Kernel Configuration" 3 4comment "Compiler: $(CC_VERSION_TEXT)" 5 6source "scripts/Kconfig.include" 7 8source "arch/um/Kconfig.common" 9 10menu "UML-specific options" 11 12menu "Host processor type and features" 13 14source "arch/x86/Kconfig.cpu" 15 16endmenu 17 18config UML_X86 19 def_bool y 20 select GENERIC_FIND_FIRST_BIT 21 22config 64BIT 23 bool "64-bit kernel" if "$(SUBARCH)" = "x86" 24 default "$(SUBARCH)" != "i386" 25 26config X86_32 27 def_bool !64BIT 28 select HAVE_AOUT 29 select ARCH_WANT_IPC_PARSE_VERSION 30 select MODULES_USE_ELF_REL 31 select CLONE_BACKWARDS 32 select OLD_SIGSUSPEND3 33 select OLD_SIGACTION 34 35config X86_64 36 def_bool 64BIT 37 select MODULES_USE_ELF_RELA 38 39config ARCH_DEFCONFIG 40 string 41 default "arch/um/configs/i386_defconfig" if X86_32 42 default "arch/um/configs/x86_64_defconfig" if X86_64 43 44config RWSEM_XCHGADD_ALGORITHM 45 def_bool 64BIT 46 47config RWSEM_GENERIC_SPINLOCK 48 def_bool !RWSEM_XCHGADD_ALGORITHM 49 50config 3_LEVEL_PGTABLES 51 bool "Three-level pagetables" if !64BIT 52 default 64BIT 53 help 54 Three-level pagetables will let UML have more than 4G of physical 55 memory. All the memory that can't be mapped directly will be treated 56 as high memory. 57 58 However, this it experimental on 32-bit architectures, so if unsure say 59 N (on x86-64 it's automatically enabled, instead, as it's safe there). 60 61config ARCH_HAS_SC_SIGNALS 62 def_bool !64BIT 63 64config ARCH_REUSE_HOST_VSYSCALL_AREA 65 def_bool !64BIT 66 67config GENERIC_HWEIGHT 68 def_bool y 69 70source "arch/um/Kconfig.um" 71 72endmenu 73 74source "arch/um/Kconfig.rest" 75