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 ARCH_BINFMT_ELF_EXTRA_PHDRS if X86_32
12 select DCACHE_WORD_ACCESS
13
14config 64BIT
15 bool "64-bit kernel" if "$(SUBARCH)" = "x86"
16 default "$(SUBARCH)" != "i386"
17
18config X86_32
19 def_bool !64BIT
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 3_LEVEL_PGTABLES
32 bool "Three-level pagetables" if !64BIT
33 default 64BIT
34 help
35 Three-level pagetables will let UML have more than 4G of physical
36 memory. All the memory that can't be mapped directly will be treated
37 as high memory.
38
39 However, this it experimental on 32-bit architectures, so if unsure say
40 N (on x86-64 it's automatically enabled, instead, as it's safe there).
41
42config ARCH_HAS_SC_SIGNALS
43 def_bool !64BIT
44
45config ARCH_REUSE_HOST_VSYSCALL_AREA
46 def_bool !64BIT
47
48config GENERIC_HWEIGHT
49 def_bool y