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
30 config 3_LEVEL_PGTABLES
31 bool "Three-level pagetables" if !64BIT
34 Three-level pagetables will let UML have more than 4G of physical
35 memory. All the memory that can't be mapped directly will be treated
38 However, this it experimental on 32-bit architectures, so if unsure say
39 N (on x86-64 it's automatically enabled, instead, as it's safe there).
41 config ARCH_HAS_SC_SIGNALS
44 config ARCH_REUSE_HOST_VSYSCALL_AREA
47 config GENERIC_HWEIGHT