tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 3_LEVEL_PGTABLES
31 bool "Three-level pagetables" if !64BIT
32 default 64BIT
33 help
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
36 as high memory.
37
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).
40
41config ARCH_HAS_SC_SIGNALS
42 def_bool !64BIT
43
44config ARCH_REUSE_HOST_VSYSCALL_AREA
45 def_bool !64BIT
46
47config GENERIC_HWEIGHT
48 def_bool y