1 # SPDX-License-Identifier: GPL-2.0
3 menu "Host processor type and features"
5 source "arch/x86/Kconfig.cpu"
11 select GENERIC_FIND_FIRST_BIT
14 bool "64-bit kernel" if "$(SUBARCH)" = "x86"
15 default "$(SUBARCH)" != "i386"
19 select ARCH_32BIT_OFF_T
20 select ARCH_WANT_IPC_PARSE_VERSION
21 select MODULES_USE_ELF_REL
22 select CLONE_BACKWARDS
23 select OLD_SIGSUSPEND3
28 select MODULES_USE_ELF_RELA
32 default "arch/um/configs/i386_defconfig" if X86_32
33 default "arch/um/configs/x86_64_defconfig" if X86_64
35 config 3_LEVEL_PGTABLES
36 bool "Three-level pagetables" if !64BIT
39 Three-level pagetables will let UML have more than 4G of physical
40 memory. All the memory that can't be mapped directly will be treated
43 However, this it experimental on 32-bit architectures, so if unsure say
44 N (on x86-64 it's automatically enabled, instead, as it's safe there).
46 config ARCH_HAS_SC_SIGNALS
49 config ARCH_REUSE_HOST_VSYSCALL_AREA
52 config GENERIC_HWEIGHT