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 HAVE_AOUT 20 select ARCH_32BIT_OFF_T 21 select ARCH_WANT_IPC_PARSE_VERSION 22 select MODULES_USE_ELF_REL 23 select CLONE_BACKWARDS 24 select OLD_SIGSUSPEND3 25 select OLD_SIGACTION 26 27config X86_64 28 def_bool 64BIT 29 select MODULES_USE_ELF_RELA 30 31config ARCH_DEFCONFIG 32 string 33 default "arch/um/configs/i386_defconfig" if X86_32 34 default "arch/um/configs/x86_64_defconfig" if X86_64 35 36config RWSEM_XCHGADD_ALGORITHM 37 def_bool 64BIT 38 39config RWSEM_GENERIC_SPINLOCK 40 def_bool !RWSEM_XCHGADD_ALGORITHM 41 42config 3_LEVEL_PGTABLES 43 bool "Three-level pagetables" if !64BIT 44 default 64BIT 45 help 46 Three-level pagetables will let UML have more than 4G of physical 47 memory. All the memory that can't be mapped directly will be treated 48 as high memory. 49 50 However, this it experimental on 32-bit architectures, so if unsure say 51 N (on x86-64 it's automatically enabled, instead, as it's safe there). 52 53config ARCH_HAS_SC_SIGNALS 54 def_bool !64BIT 55 56config ARCH_REUSE_HOST_VSYSCALL_AREA 57 def_bool !64BIT 58 59config GENERIC_HWEIGHT 60 def_bool y 61