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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
19mainmenu "Linux/Usermode Kernel Configuration"
20
21config ISA
22 bool
23
24config SBUS
25 bool
26
27config PCI
28 bool
29
Al Viro694a4642006-03-31 02:30:14 -080030config PCMCIA
31 bool
32
Paolo 'Blaisorblade' Giarrusso711553e2006-10-11 01:21:37 -070033# Yet to do!
34config TRACE_IRQFLAGS_SUPPORT
35 bool
36 default n
37
38config LOCKDEP_SUPPORT
39 bool
40 default y
41
42config STACKTRACE_SUPPORT
43 bool
44 default y
45
Linus Torvalds1da177e2005-04-16 15:20:36 -070046config GENERIC_CALIBRATE_DELAY
47 bool
48 default y
49
Paolo 'Blaisorblade' Giarrussob77d6ad2005-06-21 17:16:24 -070050# Used in kernel/irq/manage.c and include/linux/irq.h
51config IRQ_RELEASE_METHOD
52 bool
53 default y
54
Linus Torvalds1da177e2005-04-16 15:20:36 -070055menu "UML-specific options"
56
57config MODE_TT
Paolo 'Blaisorblade' Giarrussoca316fc2006-10-11 01:21:41 -070058 bool "Tracing thread support (DEPRECATED)"
Jeff Dike114d1ff2006-01-11 12:17:26 -080059 default n
Jeff Dike1a3e9ad2006-10-19 23:28:18 -070060 depends on BROKEN
Linus Torvalds1da177e2005-04-16 15:20:36 -070061 help
62 This option controls whether tracing thread support is compiled
Paolo 'Blaisorblade' Giarrussoca316fc2006-10-11 01:21:41 -070063 into UML. This option is largely obsolete, given that skas0 provides
Jeff Dike114d1ff2006-01-11 12:17:26 -080064 skas security and performance without needing to patch the host.
Paolo 'Blaisorblade' Giarrussoca316fc2006-10-11 01:21:41 -070065 It is safe to say 'N' here; saying 'Y' may cause additional problems
66 with the resulting binary even if you run UML in SKAS mode, and running
67 in TT mode is strongly *NOT RECOMMENDED*.
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
69config STATIC_LINK
70 bool "Force a static link"
71 default n
72 depends on !MODE_TT
73 help
74 If CONFIG_MODE_TT is disabled, then this option gives you the ability
75 to force a static link of UML. Normally, if only skas mode is built
76 in to UML, it will be linked as a shared binary. This is inconvenient
77 for use in a chroot jail. So, if you intend to run UML inside a
78 chroot, and you disable CONFIG_MODE_TT, you probably want to say Y
79 here.
Paolo 'Blaisorblade' Giarrussoca316fc2006-10-11 01:21:41 -070080 Additionally, this option enables using higher memory spaces (up to
81 2.75G) for UML - disabling CONFIG_MODE_TT and enabling this option leads
82 to best results for this.
Linus Torvalds1da177e2005-04-16 15:20:36 -070083
Jeff Dike77cc0db2005-11-07 00:58:57 -080084config KERNEL_HALF_GIGS
85 int "Kernel address space size (in .5G units)"
86 default "1"
87 depends on MODE_TT
88 help
89 This determines the amount of address space that UML will allocate for
90 its own, measured in half Gigabyte units. The default is 1.
91 Change this only if you need to boot UML with an unusually large amount
92 of physical memory.
93
Linus Torvalds1da177e2005-04-16 15:20:36 -070094config MODE_SKAS
Adrian Bunkeafbaa92006-01-08 01:01:34 -080095 bool "Separate Kernel Address Space support" if MODE_TT
Linus Torvalds1da177e2005-04-16 15:20:36 -070096 default y
97 help
98 This option controls whether skas (separate kernel address space)
Paolo 'Blaisorblade' Giarrussoca316fc2006-10-11 01:21:41 -070099 support is compiled in.
100 Unless you have specific needs to use TT mode (which applies almost only
101 to developers), you should say Y here.
102 SKAS mode will make use of the SKAS3 patch if it is applied on the host
103 (and your UML will run in SKAS3 mode), but if no SKAS patch is applied
104 on the host it will run in SKAS0 mode, which is anyway faster than TT
105 mode.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106
Jeff Dike08b178e2005-09-03 15:57:12 -0700107source "arch/um/Kconfig.arch"
Dave Hansen3f22ab22005-06-23 00:07:43 -0700108source "mm/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109
110config LD_SCRIPT_STATIC
111 bool
112 default y
113 depends on MODE_TT || STATIC_LINK
114
115config LD_SCRIPT_DYN
116 bool
117 default y
118 depends on !LD_SCRIPT_STATIC
119
120config NET
121 bool "Networking support"
122 help
123 Unless you really know what you are doing, you should say Y here.
124 The reason is that some programs need kernel networking support even
125 when running on a stand-alone machine that isn't connected to any
126 other computer. If you are upgrading from an older kernel, you
127 should consider updating your networking tools too because changes
128 in the kernel and the tools often go hand in hand. The tools are
129 contained in the package net-tools, the location and version number
130 of which are given in <file:Documentation/Changes>.
131
132 For a general introduction to Linux networking, it is highly
133 recommended to read the NET-HOWTO, available from
134 <http://www.tldp.org/docs.html#howto>.
135
136
137source "fs/Kconfig.binfmt"
138
139config HOSTFS
140 tristate "Host filesystem"
141 help
142 While the User-Mode Linux port uses its own root file system for
143 booting and normal file access, this module lets the UML user
144 access files stored on the host. It does not require any
145 network connection between the Host and UML. An example use of
146 this might be:
147
148 mount none /tmp/fromhost -t hostfs -o /tmp/umlshare
149
150 where /tmp/fromhost is an empty directory inside UML and
151 /tmp/umlshare is a directory on the host with files the UML user
152 wishes to access.
153
154 For more information, see
155 <http://user-mode-linux.sourceforge.net/hostfs.html>.
156
157 If you'd like to be able to work with files stored on the host,
158 say Y or M here; otherwise say N.
159
160config HPPFS
161 tristate "HoneyPot ProcFS (EXPERIMENTAL)"
Paolo 'Blaisorblade' Giarrussoce2d2ae2006-01-18 17:42:59 -0800162 depends on EXPERIMENTAL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 help
164 hppfs (HoneyPot ProcFS) is a filesystem which allows UML /proc
165 entries to be overridden, removed, or fabricated from the host.
166 Its purpose is to allow a UML to appear to be a physical machine
167 by removing or changing anything in /proc which gives away the
168 identity of a UML.
169
170 See <http://user-mode-linux.sf.net/hppfs.html> for more information.
171
172 You only need this if you are setting up a UML honeypot. Otherwise,
173 it is safe to say 'N' here.
174
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175config MCONSOLE
176 bool "Management console"
177 default y
178 help
179 The user mode linux management console is a low-level interface to
180 the kernel, somewhat like the i386 SysRq interface. Since there is
181 a full-blown operating system running under every user mode linux
182 instance, there is much greater flexibility possible than with the
183 SysRq mechanism.
184
185 If you answer 'Y' to this option, to use this feature, you need the
186 mconsole client (called uml_mconsole) which is present in CVS in
187 2.4.5-9um and later (path /tools/mconsole), and is also in the
188 distribution RPM package in 2.4.6 and later.
189
190 It is safe to say 'Y' here.
191
192config MAGIC_SYSRQ
193 bool "Magic SysRq key"
194 depends on MCONSOLE
195 ---help---
196 If you say Y here, you will have some control over the system even
197 if the system crashes for example during kernel debugging (e.g., you
198 will be able to flush the buffer cache to disk, reboot the system
199 immediately or dump some status information). A key for each of the
200 possible requests is provided.
201
202 This is the feature normally accomplished by pressing a key
203 while holding SysRq (Alt+PrintScreen).
204
205 On UML, this is accomplished by sending a "sysrq" command with
206 mconsole, followed by the letter for the requested command.
207
208 The keys are documented in <file:Documentation/sysrq.txt>. Don't say Y
209 unless you really know what this hack does.
210
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211config SMP
212 bool "Symmetric multi-processing support (EXPERIMENTAL)"
213 default n
Paolo 'Blaisorblade' Giarrusso3b8d1082005-11-13 16:07:04 -0800214 #SMP_BROKEN is for x86_64.
215 depends on MODE_TT && EXPERIMENTAL && (!SMP_BROKEN || (BROKEN && SMP_BROKEN))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216 help
217 This option enables UML SMP support.
218 It is NOT related to having a real SMP box. Not directly, at least.
219
220 UML implements virtual SMP by allowing as many processes to run
221 simultaneously on the host as there are virtual processors configured.
222
223 Obviously, if the host is a uniprocessor, those processes will
224 timeshare, but, inside UML, will appear to be running simultaneously.
225 If the host is a multiprocessor, then UML processes may run
226 simultaneously, depending on the host scheduler.
227
228 This, however, is supported only in TT mode. So, if you use the SKAS
229 patch on your host, switching to TT mode and enabling SMP usually gives
230 you worse performances.
231 Also, since the support for SMP has been under-developed, there could
232 be some bugs being exposed by enabling SMP.
233
234 If you don't know what to do, say N.
235
236config NR_CPUS
237 int "Maximum number of CPUs (2-32)"
238 range 2 32
239 depends on SMP
240 default "32"
241
242config NEST_LEVEL
243 int "Nesting level"
244 default "0"
245 help
246 This is set to the number of layers of UMLs that this UML will be run
247 in. Normally, this is zero, meaning that it will run directly on the
248 host. Setting it to one will build a UML that can run inside a UML
249 that is running on the host. Generally, if you intend this UML to run
250 inside another UML, set CONFIG_NEST_LEVEL to one more than the host
251 UML.
252
253 Note that if the hosting UML has its CONFIG_KERNEL_HALF_GIGS set to
254 greater than one, then the guest UML should have its CONFIG_NEST_LEVEL
255 set to the host's CONFIG_NEST_LEVEL + CONFIG_KERNEL_HALF_GIGS.
256 Only change this if you are running nested UMLs.
257
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258config HIGHMEM
Paolo 'Blaisorblade' Giarrussoce2d2ae2006-01-18 17:42:59 -0800259 bool "Highmem support (EXPERIMENTAL)"
260 depends on !64BIT && EXPERIMENTAL
261 default n
262 help
263 This was used to allow UML to run with big amounts of memory.
264 Currently it is unstable, so if unsure say N.
265
266 To use big amounts of memory, it is recommended to disable TT mode (i.e.
267 CONFIG_MODE_TT) and enable static linking (i.e. CONFIG_STATIC_LINK) -
268 this should allow the guest to use up to 2.75G of memory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269
270config KERNEL_STACK_ORDER
271 int "Kernel stack size order"
272 default 2
273 help
274 This option determines the size of UML kernel stacks. They will
275 be 1 << order pages. The default is OK unless you're running Valgrind
276 on UML, in which case, set this to 3.
277
278config UML_REAL_TIME_CLOCK
279 bool "Real-time Clock"
280 default y
281 help
282 This option makes UML time deltas match wall clock deltas. This should
283 normally be enabled. The exception would be if you are debugging with
284 UML and spend long times with UML stopped at a breakpoint. In this
285 case, when UML is restarted, it will call the timer enough times to make
286 up for the time spent at the breakpoint. This could result in a
Matt LaPlante44c09202006-10-03 22:34:14 +0200287 noticeable lag. If this is a problem, then disable this option.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288
289endmenu
290
291source "init/Kconfig"
292
Paolo 'Blaisorblade' Giarrussoce2d2ae2006-01-18 17:42:59 -0800293source "drivers/block/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294
Jeff Dike08b178e2005-09-03 15:57:12 -0700295source "arch/um/Kconfig.char"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296
Paolo 'Blaisorblade' Giarrussoce2d2ae2006-01-18 17:42:59 -0800297source "drivers/base/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298
Paolo 'Blaisorblade' Giarrussoce2d2ae2006-01-18 17:42:59 -0800299source "net/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300
Jeff Dike08b178e2005-09-03 15:57:12 -0700301source "arch/um/Kconfig.net"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302
Sam Ravnborgd5950b42005-07-11 21:03:49 -0700303source "drivers/net/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304
Paolo 'Blaisorblade' Giarrusso76c842d2005-12-18 17:50:37 +0100305source "drivers/connector/Kconfig"
306
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307source "fs/Kconfig"
308
309source "security/Kconfig"
310
311source "crypto/Kconfig"
312
313source "lib/Kconfig"
314
315menu "SCSI support"
316depends on BROKEN
317
318config SCSI
319 tristate "SCSI support"
320
321# This gives us free_dma, which scsi.c wants.
322config GENERIC_ISA_DMA
323 bool
324 depends on SCSI
325 default y
326
Jeff Dike08b178e2005-09-03 15:57:12 -0700327source "arch/um/Kconfig.scsi"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328
329endmenu
330
331source "drivers/md/Kconfig"
332
333if BROKEN
334 source "drivers/mtd/Kconfig"
335endif
336
337#This is just to shut up some Kconfig warnings, so no prompt.
338config INPUT
339 bool
340 default n
341
342source "arch/um/Kconfig.debug"