1# SPDX-License-Identifier: GPL-2.0 2 3menu "Host processor type and features" 4 5source "arch/x86/Kconfig.cpu" 6 7endmenu 8 9config UML_X86 10 def_bool y 11 select GENERIC_FIND_FIRST_BIT 12 13config 64BIT 14 bool "64-bit kernel" if "$(SUBARCH)" = "x86" 15 default "$(SUBARCH)" != "i386" 16 17config X86_32 18 def_bool !64BIT 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 24 select OLD_SIGACTION 25 26config X86_64 27 def_bool 64BIT 28 select MODULES_USE_ELF_RELA 29 30config ARCH_DEFCONFIG 31 string 32 default "arch/um/configs/i386_defconfig" if X86_32 33 default "arch/um/configs/x86_64_defconfig" if X86_64 34 35config 3_LEVEL_PGTABLES 36 bool "Three-level pagetables" if !64BIT 37 default 64BIT 38 help 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 41 as high memory. 42 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). 45 46config ARCH_HAS_SC_SIGNALS 47 def_bool !64BIT 48 49config ARCH_REUSE_HOST_VSYSCALL_AREA 50 def_bool !64BIT 51 52config GENERIC_HWEIGHT 53 def_bool y 54