1 # SPDX-License-Identifier: GPL-2.0
2 mainmenu "User Mode Linux/$(SUBARCH) $(KERNELVERSION) Kernel Configuration"
4 comment "Compiler: $(CC_VERSION_TEXT)"
6 source "scripts/Kconfig.include"
8 source "arch/um/Kconfig.common"
10 menu "UML-specific options"
12 menu "Host processor type and features"
14 source "arch/x86/Kconfig.cpu"
20 select GENERIC_FIND_FIRST_BIT
23 bool "64-bit kernel" if "$(SUBARCH)" = "x86"
24 default "$(SUBARCH)" != "i386"
29 select ARCH_WANT_IPC_PARSE_VERSION
30 select MODULES_USE_ELF_REL
31 select CLONE_BACKWARDS
32 select OLD_SIGSUSPEND3
37 select MODULES_USE_ELF_RELA
41 default "arch/um/configs/i386_defconfig" if X86_32
42 default "arch/um/configs/x86_64_defconfig" if X86_64
44 config RWSEM_XCHGADD_ALGORITHM
47 config RWSEM_GENERIC_SPINLOCK
48 def_bool !RWSEM_XCHGADD_ALGORITHM
50 config 3_LEVEL_PGTABLES
51 bool "Three-level pagetables" if !64BIT
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
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).
61 config ARCH_HAS_SC_SIGNALS
64 config ARCH_REUSE_HOST_VSYSCALL_AREA
67 config GENERIC_HWEIGHT
70 source "arch/um/Kconfig.um"
74 source "arch/um/Kconfig.rest"