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