1b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0 2e1cfdc0eSMasahiro Yamada 35c48b108SAl Viromenu "Host processor type and features" 45c48b108SAl Viro 55c48b108SAl Virosource "arch/x86/Kconfig.cpu" 65c48b108SAl Viro 75c48b108SAl Viroendmenu 85c48b108SAl Viro 95c48b108SAl Viroconfig UML_X86 105c48b108SAl Viro def_bool y 11*b62a8486SCatalin Marinas select ARCH_BINFMT_ELF_EXTRA_PHDRS if X86_32 125c48b108SAl Viro 135c48b108SAl Viroconfig 64BIT 14104daea1SMasahiro Yamada bool "64-bit kernel" if "$(SUBARCH)" = "x86" 15104daea1SMasahiro Yamada default "$(SUBARCH)" != "i386" 165c48b108SAl Viro 175c48b108SAl Viroconfig X86_32 185c48b108SAl Viro def_bool !64BIT 19942fa985SYury Norov select ARCH_32BIT_OFF_T 20bbb35efcSRichard Weinberger select ARCH_WANT_IPC_PARSE_VERSION 21786d35d4SDavid Howells select MODULES_USE_ELF_REL 221d4b4b29SAl Viro select CLONE_BACKWARDS 2315ce1f71SAl Viro select OLD_SIGSUSPEND3 245b3eb3adSAl Viro select OLD_SIGACTION 255c48b108SAl Viro 265c48b108SAl Viroconfig X86_64 275c48b108SAl Viro def_bool 64BIT 28786d35d4SDavid Howells select MODULES_USE_ELF_RELA 295c48b108SAl Viro 305c48b108SAl Viroconfig 3_LEVEL_PGTABLES 3101b35ab7SKees Cook bool "Three-level pagetables" if !64BIT 325c48b108SAl Viro default 64BIT 335c48b108SAl Viro help 345c48b108SAl Viro Three-level pagetables will let UML have more than 4G of physical 355c48b108SAl Viro memory. All the memory that can't be mapped directly will be treated 365c48b108SAl Viro as high memory. 375c48b108SAl Viro 385c48b108SAl Viro However, this it experimental on 32-bit architectures, so if unsure say 395c48b108SAl Viro N (on x86-64 it's automatically enabled, instead, as it's safe there). 405c48b108SAl Viro 415c48b108SAl Viroconfig ARCH_HAS_SC_SIGNALS 425c48b108SAl Viro def_bool !64BIT 435c48b108SAl Viro 445c48b108SAl Viroconfig ARCH_REUSE_HOST_VSYSCALL_AREA 455c48b108SAl Viro def_bool !64BIT 465c48b108SAl Viro 475c48b108SAl Viroconfig GENERIC_HWEIGHT 485c48b108SAl Viro def_bool y 49