Commit | Line | Data |
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85977376 PBG |
1 | menu "Host processor type and features" |
2 | ||
3 | source "arch/i386/Kconfig.cpu" | |
4 | ||
5 | endmenu | |
6 | ||
c45166be PBG |
7 | config UML_X86 |
8 | bool | |
9 | default y | |
10 | ||
11 | config 64BIT | |
1da177e4 LT |
12 | bool |
13 | default n | |
14 | ||
52fdd089 BL |
15 | config SEMAPHORE_SLEEPERS |
16 | bool | |
17 | default y | |
18 | ||
c21be1c9 PBG |
19 | choice |
20 | prompt "Host memory split" | |
21 | default HOST_VMSPLIT_3G | |
fe33f6f1 JD |
22 | help |
23 | This is needed when the host kernel on which you run has a non-default | |
24 | (like 2G/2G) memory split, instead of the customary 3G/1G. If you did | |
25 | not recompile your own kernel but use the default distro's one, you can | |
26 | safely accept the "Default split" option. | |
c21be1c9 | 27 | |
fe33f6f1 JD |
28 | It can be enabled on recent (>=2.6.16-rc2) vanilla kernels via |
29 | CONFIG_VM_SPLIT_*, or on previous kernels with special patches (-ck | |
30 | patchset by Con Kolivas, or other ones) - option names match closely the | |
31 | host CONFIG_VM_SPLIT_* ones. | |
c21be1c9 | 32 | |
fe33f6f1 JD |
33 | A lower setting (where 1G/3G is lowest and 3G/1G is higher) will |
34 | tolerate even more "normal" host kernels, but an higher setting will be | |
35 | stricter. | |
c21be1c9 | 36 | |
fe33f6f1 | 37 | So, if you do not know what to do here, say 'Default split'. |
c21be1c9 | 38 | |
b20c8453 AV |
39 | config HOST_VMSPLIT_3G |
40 | bool "Default split (3G/1G user/kernel host split)" | |
41 | config HOST_VMSPLIT_3G_OPT | |
42 | bool "3G/1G user/kernel host split (for full 1G low memory)" | |
43 | config HOST_VMSPLIT_2G | |
44 | bool "2G/2G user/kernel host split" | |
45 | config HOST_VMSPLIT_1G | |
46 | bool "1G/3G user/kernel host split" | |
c21be1c9 | 47 | endchoice |
893bb96a | 48 | |
1da177e4 | 49 | config TOP_ADDR |
c21be1c9 PBG |
50 | hex |
51 | default 0xB0000000 if HOST_VMSPLIT_3G_OPT | |
52 | default 0x78000000 if HOST_VMSPLIT_2G | |
53 | default 0x40000000 if HOST_VMSPLIT_1G | |
54 | default 0xC0000000 | |
1da177e4 LT |
55 | |
56 | config 3_LEVEL_PGTABLES | |
ce2d2aed | 57 | bool "Three-level pagetables (EXPERIMENTAL)" |
1da177e4 | 58 | default n |
ce2d2aed | 59 | depends on EXPERIMENTAL |
1da177e4 LT |
60 | help |
61 | Three-level pagetables will let UML have more than 4G of physical | |
62 | memory. All the memory that can't be mapped directly will be treated | |
63 | as high memory. | |
64 | ||
ce2d2aed PBG |
65 | However, this it experimental on 32-bit architectures, so if unsure say |
66 | N (on x86-64 it's automatically enabled, instead, as it's safe there). | |
67 | ||
d67b569f JD |
68 | config STUB_CODE |
69 | hex | |
fe33f6f1 JD |
70 | default 0xbfffe000 if !HOST_VMSPLIT_2G |
71 | default 0x7fffe000 if HOST_VMSPLIT_2G | |
d67b569f JD |
72 | |
73 | config STUB_DATA | |
74 | hex | |
fe33f6f1 JD |
75 | default 0xbffff000 if !HOST_VMSPLIT_2G |
76 | default 0x7ffff000 if HOST_VMSPLIT_2G | |
d67b569f JD |
77 | |
78 | config STUB_START | |
79 | hex | |
80 | default STUB_CODE | |
81 | ||
1da177e4 LT |
82 | config ARCH_HAS_SC_SIGNALS |
83 | bool | |
84 | default y | |
85 | ||
86 | config ARCH_REUSE_HOST_VSYSCALL_AREA | |
87 | bool | |
88 | default y | |
f214ef3e AM |
89 | |
90 | config GENERIC_HWEIGHT | |
91 | bool | |
92 | default y | |
93 |