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Paolo 'Blaisorblade' Giarrussob2670eac2006-10-19 23:28:23 -07001config DEFCONFIG_LIST
2 string
3 option defconfig_list
4 default "arch/$ARCH/defconfig"
5
Linus Torvalds1da177e2005-04-16 15:20:36 -07006# UML uses the generic IRQ sugsystem
7config GENERIC_HARDIRQS
8 bool
9 default y
10
11config UML
12 bool
13 default y
14
Linus Torvalds1da177e2005-04-16 15:20:36 -070015config MMU
16 bool
17 default y
18
Al Viro5ea81762007-02-11 15:41:31 +000019config NO_IOMEM
20 def_bool y
21
Linus Torvalds1da177e2005-04-16 15:20:36 -070022mainmenu "Linux/Usermode Kernel Configuration"
23
24config ISA
25 bool
26
27config SBUS
28 bool
29
30config PCI
31 bool
32
Al Viro694a4642006-03-31 02:30:14 -080033config PCMCIA
34 bool
35
Paolo 'Blaisorblade' Giarrusso711553e2006-10-11 01:21:37 -070036# Yet to do!
37config TRACE_IRQFLAGS_SUPPORT
38 bool
39 default n
40
41config LOCKDEP_SUPPORT
42 bool
43 default y
44
45config STACKTRACE_SUPPORT
46 bool
Al Viro6df01872007-03-14 09:15:54 +000047 default n
Paolo 'Blaisorblade' Giarrusso711553e2006-10-11 01:21:37 -070048
Linus Torvalds1da177e2005-04-16 15:20:36 -070049config GENERIC_CALIBRATE_DELAY
50 bool
51 default y
52
Jeff Dikee182c962006-12-08 02:36:23 -080053config GENERIC_BUG
54 bool
55 default y
56 depends on BUG
57
Paolo 'Blaisorblade' Giarrussob77d6ad2005-06-21 17:16:24 -070058# Used in kernel/irq/manage.c and include/linux/irq.h
59config IRQ_RELEASE_METHOD
60 bool
61 default y
62
Linus Torvalds1da177e2005-04-16 15:20:36 -070063menu "UML-specific options"
64
65config MODE_TT
Paolo 'Blaisorblade' Giarrussoca316fc2006-10-11 01:21:41 -070066 bool "Tracing thread support (DEPRECATED)"
Jeff Dike114d1ff2006-01-11 12:17:26 -080067 default n
Jeff Dike1a3e9ad2006-10-19 23:28:18 -070068 depends on BROKEN
Linus Torvalds1da177e2005-04-16 15:20:36 -070069 help
70 This option controls whether tracing thread support is compiled
Paolo 'Blaisorblade' Giarrussoca316fc2006-10-11 01:21:41 -070071 into UML. This option is largely obsolete, given that skas0 provides
Jeff Dike114d1ff2006-01-11 12:17:26 -080072 skas security and performance without needing to patch the host.
Paolo 'Blaisorblade' Giarrussoca316fc2006-10-11 01:21:41 -070073 It is safe to say 'N' here; saying 'Y' may cause additional problems
74 with the resulting binary even if you run UML in SKAS mode, and running
75 in TT mode is strongly *NOT RECOMMENDED*.
Linus Torvalds1da177e2005-04-16 15:20:36 -070076
77config STATIC_LINK
78 bool "Force a static link"
79 default n
80 depends on !MODE_TT
81 help
82 If CONFIG_MODE_TT is disabled, then this option gives you the ability
83 to force a static link of UML. Normally, if only skas mode is built
84 in to UML, it will be linked as a shared binary. This is inconvenient
85 for use in a chroot jail. So, if you intend to run UML inside a
86 chroot, and you disable CONFIG_MODE_TT, you probably want to say Y
87 here.
Paolo 'Blaisorblade' Giarrussoca316fc2006-10-11 01:21:41 -070088 Additionally, this option enables using higher memory spaces (up to
89 2.75G) for UML - disabling CONFIG_MODE_TT and enabling this option leads
90 to best results for this.
Linus Torvalds1da177e2005-04-16 15:20:36 -070091
Jeff Dike77cc0db2005-11-07 00:58:57 -080092config KERNEL_HALF_GIGS
93 int "Kernel address space size (in .5G units)"
94 default "1"
95 depends on MODE_TT
96 help
97 This determines the amount of address space that UML will allocate for
98 its own, measured in half Gigabyte units. The default is 1.
99 Change this only if you need to boot UML with an unusually large amount
100 of physical memory.
101
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102config MODE_SKAS
Adrian Bunkeafbaa92006-01-08 01:01:34 -0800103 bool "Separate Kernel Address Space support" if MODE_TT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 default y
105 help
106 This option controls whether skas (separate kernel address space)
Paolo 'Blaisorblade' Giarrussoca316fc2006-10-11 01:21:41 -0700107 support is compiled in.
108 Unless you have specific needs to use TT mode (which applies almost only
109 to developers), you should say Y here.
110 SKAS mode will make use of the SKAS3 patch if it is applied on the host
111 (and your UML will run in SKAS3 mode), but if no SKAS patch is applied
112 on the host it will run in SKAS0 mode, which is anyway faster than TT
113 mode.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114
Jeff Dike08b178e2005-09-03 15:57:12 -0700115source "arch/um/Kconfig.arch"
Dave Hansen3f22ab22005-06-23 00:07:43 -0700116source "mm/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117
118config LD_SCRIPT_STATIC
119 bool
120 default y
121 depends on MODE_TT || STATIC_LINK
122
123config LD_SCRIPT_DYN
124 bool
125 default y
126 depends on !LD_SCRIPT_STATIC
127
128config NET
129 bool "Networking support"
130 help
131 Unless you really know what you are doing, you should say Y here.
132 The reason is that some programs need kernel networking support even
133 when running on a stand-alone machine that isn't connected to any
134 other computer. If you are upgrading from an older kernel, you
135 should consider updating your networking tools too because changes
136 in the kernel and the tools often go hand in hand. The tools are
137 contained in the package net-tools, the location and version number
138 of which are given in <file:Documentation/Changes>.
139
140 For a general introduction to Linux networking, it is highly
141 recommended to read the NET-HOWTO, available from
142 <http://www.tldp.org/docs.html#howto>.
143
144
145source "fs/Kconfig.binfmt"
146
147config HOSTFS
148 tristate "Host filesystem"
149 help
150 While the User-Mode Linux port uses its own root file system for
151 booting and normal file access, this module lets the UML user
152 access files stored on the host. It does not require any
153 network connection between the Host and UML. An example use of
154 this might be:
155
156 mount none /tmp/fromhost -t hostfs -o /tmp/umlshare
157
158 where /tmp/fromhost is an empty directory inside UML and
159 /tmp/umlshare is a directory on the host with files the UML user
160 wishes to access.
161
162 For more information, see
163 <http://user-mode-linux.sourceforge.net/hostfs.html>.
164
165 If you'd like to be able to work with files stored on the host,
166 say Y or M here; otherwise say N.
167
168config HPPFS
169 tristate "HoneyPot ProcFS (EXPERIMENTAL)"
Paolo 'Blaisorblade' Giarrussoce2d2ae2006-01-18 17:42:59 -0800170 depends on EXPERIMENTAL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 help
172 hppfs (HoneyPot ProcFS) is a filesystem which allows UML /proc
173 entries to be overridden, removed, or fabricated from the host.
174 Its purpose is to allow a UML to appear to be a physical machine
175 by removing or changing anything in /proc which gives away the
176 identity of a UML.
177
178 See <http://user-mode-linux.sf.net/hppfs.html> for more information.
179
180 You only need this if you are setting up a UML honeypot. Otherwise,
181 it is safe to say 'N' here.
182
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183config MCONSOLE
184 bool "Management console"
185 default y
186 help
187 The user mode linux management console is a low-level interface to
188 the kernel, somewhat like the i386 SysRq interface. Since there is
189 a full-blown operating system running under every user mode linux
190 instance, there is much greater flexibility possible than with the
191 SysRq mechanism.
192
193 If you answer 'Y' to this option, to use this feature, you need the
194 mconsole client (called uml_mconsole) which is present in CVS in
195 2.4.5-9um and later (path /tools/mconsole), and is also in the
196 distribution RPM package in 2.4.6 and later.
197
198 It is safe to say 'Y' here.
199
200config MAGIC_SYSRQ
201 bool "Magic SysRq key"
202 depends on MCONSOLE
203 ---help---
204 If you say Y here, you will have some control over the system even
205 if the system crashes for example during kernel debugging (e.g., you
206 will be able to flush the buffer cache to disk, reboot the system
207 immediately or dump some status information). A key for each of the
208 possible requests is provided.
209
210 This is the feature normally accomplished by pressing a key
211 while holding SysRq (Alt+PrintScreen).
212
213 On UML, this is accomplished by sending a "sysrq" command with
214 mconsole, followed by the letter for the requested command.
215
216 The keys are documented in <file:Documentation/sysrq.txt>. Don't say Y
217 unless you really know what this hack does.
218
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219config SMP
220 bool "Symmetric multi-processing support (EXPERIMENTAL)"
221 default n
Paolo 'Blaisorblade' Giarrusso3b8d1082005-11-13 16:07:04 -0800222 #SMP_BROKEN is for x86_64.
223 depends on MODE_TT && EXPERIMENTAL && (!SMP_BROKEN || (BROKEN && SMP_BROKEN))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224 help
225 This option enables UML SMP support.
226 It is NOT related to having a real SMP box. Not directly, at least.
227
228 UML implements virtual SMP by allowing as many processes to run
229 simultaneously on the host as there are virtual processors configured.
230
231 Obviously, if the host is a uniprocessor, those processes will
232 timeshare, but, inside UML, will appear to be running simultaneously.
233 If the host is a multiprocessor, then UML processes may run
234 simultaneously, depending on the host scheduler.
235
236 This, however, is supported only in TT mode. So, if you use the SKAS
237 patch on your host, switching to TT mode and enabling SMP usually gives
238 you worse performances.
239 Also, since the support for SMP has been under-developed, there could
240 be some bugs being exposed by enabling SMP.
241
242 If you don't know what to do, say N.
243
244config NR_CPUS
245 int "Maximum number of CPUs (2-32)"
246 range 2 32
247 depends on SMP
248 default "32"
249
250config NEST_LEVEL
251 int "Nesting level"
252 default "0"
253 help
254 This is set to the number of layers of UMLs that this UML will be run
255 in. Normally, this is zero, meaning that it will run directly on the
256 host. Setting it to one will build a UML that can run inside a UML
257 that is running on the host. Generally, if you intend this UML to run
258 inside another UML, set CONFIG_NEST_LEVEL to one more than the host
259 UML.
260
261 Note that if the hosting UML has its CONFIG_KERNEL_HALF_GIGS set to
262 greater than one, then the guest UML should have its CONFIG_NEST_LEVEL
263 set to the host's CONFIG_NEST_LEVEL + CONFIG_KERNEL_HALF_GIGS.
264 Only change this if you are running nested UMLs.
265
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266config HIGHMEM
Paolo 'Blaisorblade' Giarrussoce2d2ae2006-01-18 17:42:59 -0800267 bool "Highmem support (EXPERIMENTAL)"
268 depends on !64BIT && EXPERIMENTAL
269 default n
270 help
271 This was used to allow UML to run with big amounts of memory.
272 Currently it is unstable, so if unsure say N.
273
274 To use big amounts of memory, it is recommended to disable TT mode (i.e.
275 CONFIG_MODE_TT) and enable static linking (i.e. CONFIG_STATIC_LINK) -
276 this should allow the guest to use up to 2.75G of memory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277
278config KERNEL_STACK_ORDER
279 int "Kernel stack size order"
Jeff Dike02239c22007-05-10 22:22:35 -0700280 default 1 if 64BIT
Jeff Dikee80ad9b2007-06-08 13:46:49 -0700281 range 1 10 if 64BIT
Jeff Dike02239c22007-05-10 22:22:35 -0700282 default 0 if !64BIT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283 help
284 This option determines the size of UML kernel stacks. They will
285 be 1 << order pages. The default is OK unless you're running Valgrind
286 on UML, in which case, set this to 3.
287
288config UML_REAL_TIME_CLOCK
289 bool "Real-time Clock"
290 default y
291 help
292 This option makes UML time deltas match wall clock deltas. This should
293 normally be enabled. The exception would be if you are debugging with
294 UML and spend long times with UML stopped at a breakpoint. In this
295 case, when UML is restarted, it will call the timer enough times to make
296 up for the time spent at the breakpoint. This could result in a
Matt LaPlante44c09202006-10-03 22:34:14 +0200297 noticeable lag. If this is a problem, then disable this option.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298
299endmenu
300
301source "init/Kconfig"
302
Paolo 'Blaisorblade' Giarrussoce2d2ae2006-01-18 17:42:59 -0800303source "drivers/block/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304
Jeff Dike08b178e2005-09-03 15:57:12 -0700305source "arch/um/Kconfig.char"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306
Paolo 'Blaisorblade' Giarrussoce2d2ae2006-01-18 17:42:59 -0800307source "drivers/base/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308
Paolo 'Blaisorblade' Giarrussoce2d2ae2006-01-18 17:42:59 -0800309source "net/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310
Jeff Dike08b178e2005-09-03 15:57:12 -0700311source "arch/um/Kconfig.net"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312
Sam Ravnborgd5950b42005-07-11 21:03:49 -0700313source "drivers/net/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314
Paolo 'Blaisorblade' Giarrusso76c842d2005-12-18 17:50:37 +0100315source "drivers/connector/Kconfig"
316
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317source "fs/Kconfig"
318
319source "security/Kconfig"
320
321source "crypto/Kconfig"
322
323source "lib/Kconfig"
324
Peter Zijlstra0ff56382007-05-09 02:33:20 -0700325source "drivers/scsi/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326
327source "drivers/md/Kconfig"
328
329if BROKEN
330 source "drivers/mtd/Kconfig"
331endif
332
333#This is just to shut up some Kconfig warnings, so no prompt.
334config INPUT
335 bool
336 default n
337
338source "arch/um/Kconfig.debug"