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Merge branch 'trivial' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
[mirror_ubuntu-bionic-kernel.git] / arch / x86 / um / Kconfig
1 mainmenu "User Mode Linux/$SUBARCH $KERNELVERSION Kernel Configuration"
2
3 source "arch/um/Kconfig.common"
4
5 menu "UML-specific options"
6
7 menu "Host processor type and features"
8
9 config CMPXCHG_LOCAL
10 bool
11 default n
12
13 config CMPXCHG_DOUBLE
14 bool
15 default n
16
17 source "arch/x86/Kconfig.cpu"
18
19 endmenu
20
21 config UML_X86
22 def_bool y
23 select GENERIC_FIND_FIRST_BIT
24
25 config 64BIT
26 bool
27 default SUBARCH = "x86_64"
28
29 config X86_32
30 def_bool !64BIT
31 select HAVE_AOUT
32
33 config X86_64
34 def_bool 64BIT
35
36 config RWSEM_XCHGADD_ALGORITHM
37 def_bool X86_XADD && 64BIT
38
39 config RWSEM_GENERIC_SPINLOCK
40 def_bool !RWSEM_XCHGADD_ALGORITHM
41
42 config 3_LEVEL_PGTABLES
43 bool "Three-level pagetables (EXPERIMENTAL)" if !64BIT
44 default 64BIT
45 depends on EXPERIMENTAL
46 help
47 Three-level pagetables will let UML have more than 4G of physical
48 memory. All the memory that can't be mapped directly will be treated
49 as high memory.
50
51 However, this it experimental on 32-bit architectures, so if unsure say
52 N (on x86-64 it's automatically enabled, instead, as it's safe there).
53
54 config ARCH_HAS_SC_SIGNALS
55 def_bool !64BIT
56
57 config ARCH_REUSE_HOST_VSYSCALL_AREA
58 def_bool !64BIT
59
60 config GENERIC_HWEIGHT
61 def_bool y
62
63 source "arch/um/Kconfig.um"
64
65 endmenu
66
67 source "arch/um/Kconfig.rest"