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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 | ||
10 | # XXX: does UM have a mmu/swap? | |
11 | config MMU | |
12 | bool | |
13 | default y | |
14 | ||
15 | mainmenu "Linux/Usermode Kernel Configuration" | |
16 | ||
17 | config ISA | |
18 | bool | |
19 | ||
20 | config SBUS | |
21 | bool | |
22 | ||
23 | config PCI | |
24 | bool | |
25 | ||
26 | config UID16 | |
27 | bool | |
28 | default y | |
29 | ||
1da177e4 LT |
30 | config GENERIC_CALIBRATE_DELAY |
31 | bool | |
32 | default y | |
33 | ||
b77d6adc PBG |
34 | # Used in kernel/irq/manage.c and include/linux/irq.h |
35 | config IRQ_RELEASE_METHOD | |
36 | bool | |
37 | default y | |
38 | ||
96d55b88 PBG |
39 | menu "Host processor type and features" |
40 | ||
41 | source "arch/i386/Kconfig.cpu" | |
42 | ||
43 | endmenu | |
44 | ||
1da177e4 LT |
45 | menu "UML-specific options" |
46 | ||
47 | config MODE_TT | |
48 | bool "Tracing thread support" | |
49 | default y | |
50 | help | |
51 | This option controls whether tracing thread support is compiled | |
52 | into UML. Normally, this should be set to Y. If you intend to | |
53 | use only skas mode (and the host has the skas patch applied to it), | |
54 | then it is OK to say N here. | |
55 | ||
56 | config STATIC_LINK | |
57 | bool "Force a static link" | |
58 | default n | |
59 | depends on !MODE_TT | |
60 | help | |
61 | If CONFIG_MODE_TT is disabled, then this option gives you the ability | |
62 | to force a static link of UML. Normally, if only skas mode is built | |
63 | in to UML, it will be linked as a shared binary. This is inconvenient | |
64 | for use in a chroot jail. So, if you intend to run UML inside a | |
65 | chroot, and you disable CONFIG_MODE_TT, you probably want to say Y | |
66 | here. | |
67 | ||
68 | config MODE_SKAS | |
69 | bool "Separate Kernel Address Space support" | |
70 | default y | |
71 | help | |
72 | This option controls whether skas (separate kernel address space) | |
73 | support is compiled in. If you have applied the skas patch to the | |
74 | host, then you certainly want to say Y here (and consider saying N | |
75 | to CONFIG_MODE_TT). Otherwise, it is safe to say Y. Disabling this | |
76 | option will shrink the UML binary slightly. | |
77 | ||
08b178eb | 78 | source "arch/um/Kconfig.arch" |
3f22ab27 | 79 | source "mm/Kconfig" |
1da177e4 LT |
80 | |
81 | config LD_SCRIPT_STATIC | |
82 | bool | |
83 | default y | |
84 | depends on MODE_TT || STATIC_LINK | |
85 | ||
86 | config LD_SCRIPT_DYN | |
87 | bool | |
88 | default y | |
89 | depends on !LD_SCRIPT_STATIC | |
90 | ||
91 | config NET | |
92 | bool "Networking support" | |
93 | help | |
94 | Unless you really know what you are doing, you should say Y here. | |
95 | The reason is that some programs need kernel networking support even | |
96 | when running on a stand-alone machine that isn't connected to any | |
97 | other computer. If you are upgrading from an older kernel, you | |
98 | should consider updating your networking tools too because changes | |
99 | in the kernel and the tools often go hand in hand. The tools are | |
100 | contained in the package net-tools, the location and version number | |
101 | of which are given in <file:Documentation/Changes>. | |
102 | ||
103 | For a general introduction to Linux networking, it is highly | |
104 | recommended to read the NET-HOWTO, available from | |
105 | <http://www.tldp.org/docs.html#howto>. | |
106 | ||
107 | ||
108 | source "fs/Kconfig.binfmt" | |
109 | ||
110 | config HOSTFS | |
111 | tristate "Host filesystem" | |
112 | help | |
113 | While the User-Mode Linux port uses its own root file system for | |
114 | booting and normal file access, this module lets the UML user | |
115 | access files stored on the host. It does not require any | |
116 | network connection between the Host and UML. An example use of | |
117 | this might be: | |
118 | ||
119 | mount none /tmp/fromhost -t hostfs -o /tmp/umlshare | |
120 | ||
121 | where /tmp/fromhost is an empty directory inside UML and | |
122 | /tmp/umlshare is a directory on the host with files the UML user | |
123 | wishes to access. | |
124 | ||
125 | For more information, see | |
126 | <http://user-mode-linux.sourceforge.net/hostfs.html>. | |
127 | ||
128 | If you'd like to be able to work with files stored on the host, | |
129 | say Y or M here; otherwise say N. | |
130 | ||
131 | config HPPFS | |
132 | tristate "HoneyPot ProcFS (EXPERIMENTAL)" | |
1da177e4 LT |
133 | help |
134 | hppfs (HoneyPot ProcFS) is a filesystem which allows UML /proc | |
135 | entries to be overridden, removed, or fabricated from the host. | |
136 | Its purpose is to allow a UML to appear to be a physical machine | |
137 | by removing or changing anything in /proc which gives away the | |
138 | identity of a UML. | |
139 | ||
140 | See <http://user-mode-linux.sf.net/hppfs.html> for more information. | |
141 | ||
142 | You only need this if you are setting up a UML honeypot. Otherwise, | |
143 | it is safe to say 'N' here. | |
144 | ||
3f580470 PBG |
145 | If you are actively using it, please report any problems, since it's |
146 | getting fixed. In this moment, it is experimental on 2.6 (it works on | |
147 | 2.4). | |
1da177e4 LT |
148 | |
149 | config MCONSOLE | |
150 | bool "Management console" | |
151 | default y | |
152 | help | |
153 | The user mode linux management console is a low-level interface to | |
154 | the kernel, somewhat like the i386 SysRq interface. Since there is | |
155 | a full-blown operating system running under every user mode linux | |
156 | instance, there is much greater flexibility possible than with the | |
157 | SysRq mechanism. | |
158 | ||
159 | If you answer 'Y' to this option, to use this feature, you need the | |
160 | mconsole client (called uml_mconsole) which is present in CVS in | |
161 | 2.4.5-9um and later (path /tools/mconsole), and is also in the | |
162 | distribution RPM package in 2.4.6 and later. | |
163 | ||
164 | It is safe to say 'Y' here. | |
165 | ||
166 | config MAGIC_SYSRQ | |
167 | bool "Magic SysRq key" | |
168 | depends on MCONSOLE | |
169 | ---help--- | |
170 | If you say Y here, you will have some control over the system even | |
171 | if the system crashes for example during kernel debugging (e.g., you | |
172 | will be able to flush the buffer cache to disk, reboot the system | |
173 | immediately or dump some status information). A key for each of the | |
174 | possible requests is provided. | |
175 | ||
176 | This is the feature normally accomplished by pressing a key | |
177 | while holding SysRq (Alt+PrintScreen). | |
178 | ||
179 | On UML, this is accomplished by sending a "sysrq" command with | |
180 | mconsole, followed by the letter for the requested command. | |
181 | ||
182 | The keys are documented in <file:Documentation/sysrq.txt>. Don't say Y | |
183 | unless you really know what this hack does. | |
184 | ||
185 | config HOST_2G_2G | |
186 | bool "2G/2G host address space split" | |
187 | default n | |
188 | help | |
189 | This is needed when the host on which you run has a 2G/2G memory | |
190 | split, instead of the customary 3G/1G. | |
191 | ||
192 | Note that to enable such a host | |
193 | configuration, which makes sense only in some cases, you need special | |
194 | host patches. | |
195 | ||
196 | So, if you do not know what to do here, say 'N'. | |
197 | ||
198 | config SMP | |
199 | bool "Symmetric multi-processing support (EXPERIMENTAL)" | |
200 | default n | |
02edeb58 | 201 | depends on (MODE_TT && EXPERIMENTAL && !SMP_BROKEN) || (BROKEN && SMP_BROKEN) |
1da177e4 LT |
202 | help |
203 | This option enables UML SMP support. | |
204 | It is NOT related to having a real SMP box. Not directly, at least. | |
205 | ||
206 | UML implements virtual SMP by allowing as many processes to run | |
207 | simultaneously on the host as there are virtual processors configured. | |
208 | ||
209 | Obviously, if the host is a uniprocessor, those processes will | |
210 | timeshare, but, inside UML, will appear to be running simultaneously. | |
211 | If the host is a multiprocessor, then UML processes may run | |
212 | simultaneously, depending on the host scheduler. | |
213 | ||
214 | This, however, is supported only in TT mode. So, if you use the SKAS | |
215 | patch on your host, switching to TT mode and enabling SMP usually gives | |
216 | you worse performances. | |
217 | Also, since the support for SMP has been under-developed, there could | |
218 | be some bugs being exposed by enabling SMP. | |
219 | ||
220 | If you don't know what to do, say N. | |
221 | ||
222 | config NR_CPUS | |
223 | int "Maximum number of CPUs (2-32)" | |
224 | range 2 32 | |
225 | depends on SMP | |
226 | default "32" | |
227 | ||
228 | config NEST_LEVEL | |
229 | int "Nesting level" | |
230 | default "0" | |
231 | help | |
232 | This is set to the number of layers of UMLs that this UML will be run | |
233 | in. Normally, this is zero, meaning that it will run directly on the | |
234 | host. Setting it to one will build a UML that can run inside a UML | |
235 | that is running on the host. Generally, if you intend this UML to run | |
236 | inside another UML, set CONFIG_NEST_LEVEL to one more than the host | |
237 | UML. | |
238 | ||
239 | Note that if the hosting UML has its CONFIG_KERNEL_HALF_GIGS set to | |
240 | greater than one, then the guest UML should have its CONFIG_NEST_LEVEL | |
241 | set to the host's CONFIG_NEST_LEVEL + CONFIG_KERNEL_HALF_GIGS. | |
242 | Only change this if you are running nested UMLs. | |
243 | ||
244 | config KERNEL_HALF_GIGS | |
245 | int "Kernel address space size (in .5G units)" | |
246 | default "1" | |
247 | help | |
248 | This determines the amount of address space that UML will allocate for | |
249 | its own, measured in half Gigabyte units. The default is 1. | |
250 | Change this only if you need to boot UML with an unusually large amount | |
251 | of physical memory. | |
252 | ||
253 | config HIGHMEM | |
254 | bool "Highmem support" | |
c45166be | 255 | depends on !64BIT |
1da177e4 LT |
256 | |
257 | config KERNEL_STACK_ORDER | |
258 | int "Kernel stack size order" | |
259 | default 2 | |
260 | help | |
261 | This option determines the size of UML kernel stacks. They will | |
262 | be 1 << order pages. The default is OK unless you're running Valgrind | |
263 | on UML, in which case, set this to 3. | |
264 | ||
265 | config UML_REAL_TIME_CLOCK | |
266 | bool "Real-time Clock" | |
267 | default y | |
268 | help | |
269 | This option makes UML time deltas match wall clock deltas. This should | |
270 | normally be enabled. The exception would be if you are debugging with | |
271 | UML and spend long times with UML stopped at a breakpoint. In this | |
272 | case, when UML is restarted, it will call the timer enough times to make | |
273 | up for the time spent at the breakpoint. This could result in a | |
274 | noticable lag. If this is a problem, then disable this option. | |
275 | ||
276 | endmenu | |
277 | ||
278 | source "init/Kconfig" | |
279 | ||
d5950b43 SR |
280 | source "net/Kconfig" |
281 | ||
1da177e4 LT |
282 | source "drivers/base/Kconfig" |
283 | ||
08b178eb | 284 | source "arch/um/Kconfig.char" |
1da177e4 LT |
285 | |
286 | source "drivers/block/Kconfig" | |
287 | ||
288 | config NETDEVICES | |
289 | bool | |
290 | default NET | |
291 | ||
08b178eb | 292 | source "arch/um/Kconfig.net" |
1da177e4 | 293 | |
d5950b43 | 294 | source "drivers/net/Kconfig" |
1da177e4 LT |
295 | |
296 | source "fs/Kconfig" | |
297 | ||
298 | source "security/Kconfig" | |
299 | ||
300 | source "crypto/Kconfig" | |
301 | ||
302 | source "lib/Kconfig" | |
303 | ||
304 | menu "SCSI support" | |
305 | depends on BROKEN | |
306 | ||
307 | config SCSI | |
308 | tristate "SCSI support" | |
309 | ||
310 | # This gives us free_dma, which scsi.c wants. | |
311 | config GENERIC_ISA_DMA | |
312 | bool | |
313 | depends on SCSI | |
314 | default y | |
315 | ||
08b178eb | 316 | source "arch/um/Kconfig.scsi" |
1da177e4 LT |
317 | |
318 | endmenu | |
319 | ||
320 | source "drivers/md/Kconfig" | |
321 | ||
322 | if BROKEN | |
323 | source "drivers/mtd/Kconfig" | |
324 | endif | |
325 | ||
326 | #This is just to shut up some Kconfig warnings, so no prompt. | |
327 | config INPUT | |
328 | bool | |
329 | default n | |
330 | ||
331 | source "arch/um/Kconfig.debug" |