]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | # UML uses the generic IRQ sugsystem |
2 | config GENERIC_HARDIRQS | |
3 | bool | |
4 | default y | |
5 | ||
6 | config UML | |
7 | bool | |
8 | default y | |
9 | ||
1da177e4 LT |
10 | config MMU |
11 | bool | |
12 | default y | |
13 | ||
14 | mainmenu "Linux/Usermode Kernel Configuration" | |
15 | ||
16 | config ISA | |
17 | bool | |
18 | ||
19 | config SBUS | |
20 | bool | |
21 | ||
22 | config PCI | |
23 | bool | |
24 | ||
694a464e AV |
25 | config PCMCIA |
26 | bool | |
27 | ||
1da177e4 LT |
28 | config GENERIC_CALIBRATE_DELAY |
29 | bool | |
30 | default y | |
31 | ||
b77d6adc PBG |
32 | # Used in kernel/irq/manage.c and include/linux/irq.h |
33 | config IRQ_RELEASE_METHOD | |
34 | bool | |
35 | default y | |
36 | ||
1da177e4 LT |
37 | menu "UML-specific options" |
38 | ||
39 | config MODE_TT | |
40 | bool "Tracing thread support" | |
114d1ff4 | 41 | default n |
1da177e4 LT |
42 | help |
43 | This option controls whether tracing thread support is compiled | |
114d1ff4 JD |
44 | into UML. This option is largely obsolete, given that skas0 provides |
45 | skas security and performance without needing to patch the host. | |
46 | It is safe to say 'N' here. | |
1da177e4 LT |
47 | |
48 | config STATIC_LINK | |
49 | bool "Force a static link" | |
50 | default n | |
51 | depends on !MODE_TT | |
52 | help | |
53 | If CONFIG_MODE_TT is disabled, then this option gives you the ability | |
54 | to force a static link of UML. Normally, if only skas mode is built | |
55 | in to UML, it will be linked as a shared binary. This is inconvenient | |
56 | for use in a chroot jail. So, if you intend to run UML inside a | |
57 | chroot, and you disable CONFIG_MODE_TT, you probably want to say Y | |
58 | here. | |
59 | ||
77cc0db4 JD |
60 | config KERNEL_HALF_GIGS |
61 | int "Kernel address space size (in .5G units)" | |
62 | default "1" | |
63 | depends on MODE_TT | |
64 | help | |
65 | This determines the amount of address space that UML will allocate for | |
66 | its own, measured in half Gigabyte units. The default is 1. | |
67 | Change this only if you need to boot UML with an unusually large amount | |
68 | of physical memory. | |
69 | ||
1da177e4 | 70 | config MODE_SKAS |
eafbaa94 | 71 | bool "Separate Kernel Address Space support" if MODE_TT |
1da177e4 LT |
72 | default y |
73 | help | |
74 | This option controls whether skas (separate kernel address space) | |
75 | support is compiled in. If you have applied the skas patch to the | |
76 | host, then you certainly want to say Y here (and consider saying N | |
77 | to CONFIG_MODE_TT). Otherwise, it is safe to say Y. Disabling this | |
78 | option will shrink the UML binary slightly. | |
79 | ||
08b178eb | 80 | source "arch/um/Kconfig.arch" |
3f22ab27 | 81 | source "mm/Kconfig" |
1da177e4 LT |
82 | |
83 | config LD_SCRIPT_STATIC | |
84 | bool | |
85 | default y | |
86 | depends on MODE_TT || STATIC_LINK | |
87 | ||
88 | config LD_SCRIPT_DYN | |
89 | bool | |
90 | default y | |
91 | depends on !LD_SCRIPT_STATIC | |
92 | ||
93 | config NET | |
94 | bool "Networking support" | |
95 | help | |
96 | Unless you really know what you are doing, you should say Y here. | |
97 | The reason is that some programs need kernel networking support even | |
98 | when running on a stand-alone machine that isn't connected to any | |
99 | other computer. If you are upgrading from an older kernel, you | |
100 | should consider updating your networking tools too because changes | |
101 | in the kernel and the tools often go hand in hand. The tools are | |
102 | contained in the package net-tools, the location and version number | |
103 | of which are given in <file:Documentation/Changes>. | |
104 | ||
105 | For a general introduction to Linux networking, it is highly | |
106 | recommended to read the NET-HOWTO, available from | |
107 | <http://www.tldp.org/docs.html#howto>. | |
108 | ||
109 | ||
110 | source "fs/Kconfig.binfmt" | |
111 | ||
112 | config HOSTFS | |
113 | tristate "Host filesystem" | |
114 | help | |
115 | While the User-Mode Linux port uses its own root file system for | |
116 | booting and normal file access, this module lets the UML user | |
117 | access files stored on the host. It does not require any | |
118 | network connection between the Host and UML. An example use of | |
119 | this might be: | |
120 | ||
121 | mount none /tmp/fromhost -t hostfs -o /tmp/umlshare | |
122 | ||
123 | where /tmp/fromhost is an empty directory inside UML and | |
124 | /tmp/umlshare is a directory on the host with files the UML user | |
125 | wishes to access. | |
126 | ||
127 | For more information, see | |
128 | <http://user-mode-linux.sourceforge.net/hostfs.html>. | |
129 | ||
130 | If you'd like to be able to work with files stored on the host, | |
131 | say Y or M here; otherwise say N. | |
132 | ||
133 | config HPPFS | |
134 | tristate "HoneyPot ProcFS (EXPERIMENTAL)" | |
ce2d2aed | 135 | depends on EXPERIMENTAL |
1da177e4 LT |
136 | help |
137 | hppfs (HoneyPot ProcFS) is a filesystem which allows UML /proc | |
138 | entries to be overridden, removed, or fabricated from the host. | |
139 | Its purpose is to allow a UML to appear to be a physical machine | |
140 | by removing or changing anything in /proc which gives away the | |
141 | identity of a UML. | |
142 | ||
143 | See <http://user-mode-linux.sf.net/hppfs.html> for more information. | |
144 | ||
145 | You only need this if you are setting up a UML honeypot. Otherwise, | |
146 | it is safe to say 'N' here. | |
147 | ||
1da177e4 LT |
148 | config MCONSOLE |
149 | bool "Management console" | |
150 | default y | |
151 | help | |
152 | The user mode linux management console is a low-level interface to | |
153 | the kernel, somewhat like the i386 SysRq interface. Since there is | |
154 | a full-blown operating system running under every user mode linux | |
155 | instance, there is much greater flexibility possible than with the | |
156 | SysRq mechanism. | |
157 | ||
158 | If you answer 'Y' to this option, to use this feature, you need the | |
159 | mconsole client (called uml_mconsole) which is present in CVS in | |
160 | 2.4.5-9um and later (path /tools/mconsole), and is also in the | |
161 | distribution RPM package in 2.4.6 and later. | |
162 | ||
163 | It is safe to say 'Y' here. | |
164 | ||
165 | config MAGIC_SYSRQ | |
166 | bool "Magic SysRq key" | |
167 | depends on MCONSOLE | |
168 | ---help--- | |
169 | If you say Y here, you will have some control over the system even | |
170 | if the system crashes for example during kernel debugging (e.g., you | |
171 | will be able to flush the buffer cache to disk, reboot the system | |
172 | immediately or dump some status information). A key for each of the | |
173 | possible requests is provided. | |
174 | ||
175 | This is the feature normally accomplished by pressing a key | |
176 | while holding SysRq (Alt+PrintScreen). | |
177 | ||
178 | On UML, this is accomplished by sending a "sysrq" command with | |
179 | mconsole, followed by the letter for the requested command. | |
180 | ||
181 | The keys are documented in <file:Documentation/sysrq.txt>. Don't say Y | |
182 | unless you really know what this hack does. | |
183 | ||
1da177e4 LT |
184 | config SMP |
185 | bool "Symmetric multi-processing support (EXPERIMENTAL)" | |
186 | default n | |
3b8d108a PBG |
187 | #SMP_BROKEN is for x86_64. |
188 | depends on MODE_TT && EXPERIMENTAL && (!SMP_BROKEN || (BROKEN && SMP_BROKEN)) | |
1da177e4 LT |
189 | help |
190 | This option enables UML SMP support. | |
191 | It is NOT related to having a real SMP box. Not directly, at least. | |
192 | ||
193 | UML implements virtual SMP by allowing as many processes to run | |
194 | simultaneously on the host as there are virtual processors configured. | |
195 | ||
196 | Obviously, if the host is a uniprocessor, those processes will | |
197 | timeshare, but, inside UML, will appear to be running simultaneously. | |
198 | If the host is a multiprocessor, then UML processes may run | |
199 | simultaneously, depending on the host scheduler. | |
200 | ||
201 | This, however, is supported only in TT mode. So, if you use the SKAS | |
202 | patch on your host, switching to TT mode and enabling SMP usually gives | |
203 | you worse performances. | |
204 | Also, since the support for SMP has been under-developed, there could | |
205 | be some bugs being exposed by enabling SMP. | |
206 | ||
207 | If you don't know what to do, say N. | |
208 | ||
209 | config NR_CPUS | |
210 | int "Maximum number of CPUs (2-32)" | |
211 | range 2 32 | |
212 | depends on SMP | |
213 | default "32" | |
214 | ||
215 | config NEST_LEVEL | |
216 | int "Nesting level" | |
217 | default "0" | |
218 | help | |
219 | This is set to the number of layers of UMLs that this UML will be run | |
220 | in. Normally, this is zero, meaning that it will run directly on the | |
221 | host. Setting it to one will build a UML that can run inside a UML | |
222 | that is running on the host. Generally, if you intend this UML to run | |
223 | inside another UML, set CONFIG_NEST_LEVEL to one more than the host | |
224 | UML. | |
225 | ||
226 | Note that if the hosting UML has its CONFIG_KERNEL_HALF_GIGS set to | |
227 | greater than one, then the guest UML should have its CONFIG_NEST_LEVEL | |
228 | set to the host's CONFIG_NEST_LEVEL + CONFIG_KERNEL_HALF_GIGS. | |
229 | Only change this if you are running nested UMLs. | |
230 | ||
1da177e4 | 231 | config HIGHMEM |
ce2d2aed PBG |
232 | bool "Highmem support (EXPERIMENTAL)" |
233 | depends on !64BIT && EXPERIMENTAL | |
234 | default n | |
235 | help | |
236 | This was used to allow UML to run with big amounts of memory. | |
237 | Currently it is unstable, so if unsure say N. | |
238 | ||
239 | To use big amounts of memory, it is recommended to disable TT mode (i.e. | |
240 | CONFIG_MODE_TT) and enable static linking (i.e. CONFIG_STATIC_LINK) - | |
241 | this should allow the guest to use up to 2.75G of memory. | |
1da177e4 LT |
242 | |
243 | config KERNEL_STACK_ORDER | |
244 | int "Kernel stack size order" | |
245 | default 2 | |
246 | help | |
247 | This option determines the size of UML kernel stacks. They will | |
248 | be 1 << order pages. The default is OK unless you're running Valgrind | |
249 | on UML, in which case, set this to 3. | |
250 | ||
251 | config UML_REAL_TIME_CLOCK | |
252 | bool "Real-time Clock" | |
253 | default y | |
254 | help | |
255 | This option makes UML time deltas match wall clock deltas. This should | |
256 | normally be enabled. The exception would be if you are debugging with | |
257 | UML and spend long times with UML stopped at a breakpoint. In this | |
258 | case, when UML is restarted, it will call the timer enough times to make | |
259 | up for the time spent at the breakpoint. This could result in a | |
44c09201 | 260 | noticeable lag. If this is a problem, then disable this option. |
1da177e4 LT |
261 | |
262 | endmenu | |
263 | ||
264 | source "init/Kconfig" | |
265 | ||
ce2d2aed | 266 | source "drivers/block/Kconfig" |
1da177e4 | 267 | |
08b178eb | 268 | source "arch/um/Kconfig.char" |
1da177e4 | 269 | |
ce2d2aed | 270 | source "drivers/base/Kconfig" |
1da177e4 | 271 | |
ce2d2aed | 272 | source "net/Kconfig" |
1da177e4 | 273 | |
08b178eb | 274 | source "arch/um/Kconfig.net" |
1da177e4 | 275 | |
d5950b43 | 276 | source "drivers/net/Kconfig" |
1da177e4 | 277 | |
76c842d8 PBG |
278 | source "drivers/connector/Kconfig" |
279 | ||
1da177e4 LT |
280 | source "fs/Kconfig" |
281 | ||
282 | source "security/Kconfig" | |
283 | ||
284 | source "crypto/Kconfig" | |
285 | ||
286 | source "lib/Kconfig" | |
287 | ||
288 | menu "SCSI support" | |
289 | depends on BROKEN | |
290 | ||
291 | config SCSI | |
292 | tristate "SCSI support" | |
293 | ||
294 | # This gives us free_dma, which scsi.c wants. | |
295 | config GENERIC_ISA_DMA | |
296 | bool | |
297 | depends on SCSI | |
298 | default y | |
299 | ||
08b178eb | 300 | source "arch/um/Kconfig.scsi" |
1da177e4 LT |
301 | |
302 | endmenu | |
303 | ||
304 | source "drivers/md/Kconfig" | |
305 | ||
306 | if BROKEN | |
307 | source "drivers/mtd/Kconfig" | |
308 | endif | |
309 | ||
310 | #This is just to shut up some Kconfig warnings, so no prompt. | |
311 | config INPUT | |
312 | bool | |
313 | default n | |
314 | ||
315 | source "arch/um/Kconfig.debug" |