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Linus Torvalds1da177e2005-04-16 15:20:36 -07001# UML uses the generic IRQ sugsystem
2config GENERIC_HARDIRQS
3 bool
4 default y
5
6config UML
7 bool
8 default y
9
Linus Torvalds1da177e2005-04-16 15:20:36 -070010config MMU
11 bool
12 default y
13
14mainmenu "Linux/Usermode Kernel Configuration"
15
16config ISA
17 bool
18
19config SBUS
20 bool
21
22config PCI
23 bool
24
Al Viro694a4642006-03-31 02:30:14 -080025config PCMCIA
26 bool
27
Paolo 'Blaisorblade' Giarrusso711553e2006-10-11 01:21:37 -070028# Yet to do!
29config TRACE_IRQFLAGS_SUPPORT
30 bool
31 default n
32
33config LOCKDEP_SUPPORT
34 bool
35 default y
36
37config STACKTRACE_SUPPORT
38 bool
39 default y
40
Linus Torvalds1da177e2005-04-16 15:20:36 -070041config GENERIC_CALIBRATE_DELAY
42 bool
43 default y
44
Paolo 'Blaisorblade' Giarrussob77d6ad2005-06-21 17:16:24 -070045# Used in kernel/irq/manage.c and include/linux/irq.h
46config IRQ_RELEASE_METHOD
47 bool
48 default y
49
Linus Torvalds1da177e2005-04-16 15:20:36 -070050menu "UML-specific options"
51
52config MODE_TT
Paolo 'Blaisorblade' Giarrussoca316fc2006-10-11 01:21:41 -070053 bool "Tracing thread support (DEPRECATED)"
Jeff Dike114d1ff2006-01-11 12:17:26 -080054 default n
Linus Torvalds1da177e2005-04-16 15:20:36 -070055 help
56 This option controls whether tracing thread support is compiled
Paolo 'Blaisorblade' Giarrussoca316fc2006-10-11 01:21:41 -070057 into UML. This option is largely obsolete, given that skas0 provides
Jeff Dike114d1ff2006-01-11 12:17:26 -080058 skas security and performance without needing to patch the host.
Paolo 'Blaisorblade' Giarrussoca316fc2006-10-11 01:21:41 -070059 It is safe to say 'N' here; saying 'Y' may cause additional problems
60 with the resulting binary even if you run UML in SKAS mode, and running
61 in TT mode is strongly *NOT RECOMMENDED*.
Linus Torvalds1da177e2005-04-16 15:20:36 -070062
63config STATIC_LINK
64 bool "Force a static link"
65 default n
66 depends on !MODE_TT
67 help
68 If CONFIG_MODE_TT is disabled, then this option gives you the ability
69 to force a static link of UML. Normally, if only skas mode is built
70 in to UML, it will be linked as a shared binary. This is inconvenient
71 for use in a chroot jail. So, if you intend to run UML inside a
72 chroot, and you disable CONFIG_MODE_TT, you probably want to say Y
73 here.
Paolo 'Blaisorblade' Giarrussoca316fc2006-10-11 01:21:41 -070074 Additionally, this option enables using higher memory spaces (up to
75 2.75G) for UML - disabling CONFIG_MODE_TT and enabling this option leads
76 to best results for this.
Linus Torvalds1da177e2005-04-16 15:20:36 -070077
Jeff Dike77cc0db2005-11-07 00:58:57 -080078config KERNEL_HALF_GIGS
79 int "Kernel address space size (in .5G units)"
80 default "1"
81 depends on MODE_TT
82 help
83 This determines the amount of address space that UML will allocate for
84 its own, measured in half Gigabyte units. The default is 1.
85 Change this only if you need to boot UML with an unusually large amount
86 of physical memory.
87
Linus Torvalds1da177e2005-04-16 15:20:36 -070088config MODE_SKAS
Adrian Bunkeafbaa92006-01-08 01:01:34 -080089 bool "Separate Kernel Address Space support" if MODE_TT
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 default y
91 help
92 This option controls whether skas (separate kernel address space)
Paolo 'Blaisorblade' Giarrussoca316fc2006-10-11 01:21:41 -070093 support is compiled in.
94 Unless you have specific needs to use TT mode (which applies almost only
95 to developers), you should say Y here.
96 SKAS mode will make use of the SKAS3 patch if it is applied on the host
97 (and your UML will run in SKAS3 mode), but if no SKAS patch is applied
98 on the host it will run in SKAS0 mode, which is anyway faster than TT
99 mode.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100
Jeff Dike08b178e2005-09-03 15:57:12 -0700101source "arch/um/Kconfig.arch"
Dave Hansen3f22ab22005-06-23 00:07:43 -0700102source "mm/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103
104config LD_SCRIPT_STATIC
105 bool
106 default y
107 depends on MODE_TT || STATIC_LINK
108
109config LD_SCRIPT_DYN
110 bool
111 default y
112 depends on !LD_SCRIPT_STATIC
113
114config NET
115 bool "Networking support"
116 help
117 Unless you really know what you are doing, you should say Y here.
118 The reason is that some programs need kernel networking support even
119 when running on a stand-alone machine that isn't connected to any
120 other computer. If you are upgrading from an older kernel, you
121 should consider updating your networking tools too because changes
122 in the kernel and the tools often go hand in hand. The tools are
123 contained in the package net-tools, the location and version number
124 of which are given in <file:Documentation/Changes>.
125
126 For a general introduction to Linux networking, it is highly
127 recommended to read the NET-HOWTO, available from
128 <http://www.tldp.org/docs.html#howto>.
129
130
131source "fs/Kconfig.binfmt"
132
133config HOSTFS
134 tristate "Host filesystem"
135 help
136 While the User-Mode Linux port uses its own root file system for
137 booting and normal file access, this module lets the UML user
138 access files stored on the host. It does not require any
139 network connection between the Host and UML. An example use of
140 this might be:
141
142 mount none /tmp/fromhost -t hostfs -o /tmp/umlshare
143
144 where /tmp/fromhost is an empty directory inside UML and
145 /tmp/umlshare is a directory on the host with files the UML user
146 wishes to access.
147
148 For more information, see
149 <http://user-mode-linux.sourceforge.net/hostfs.html>.
150
151 If you'd like to be able to work with files stored on the host,
152 say Y or M here; otherwise say N.
153
154config HPPFS
155 tristate "HoneyPot ProcFS (EXPERIMENTAL)"
Paolo 'Blaisorblade' Giarrussoce2d2ae2006-01-18 17:42:59 -0800156 depends on EXPERIMENTAL
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157 help
158 hppfs (HoneyPot ProcFS) is a filesystem which allows UML /proc
159 entries to be overridden, removed, or fabricated from the host.
160 Its purpose is to allow a UML to appear to be a physical machine
161 by removing or changing anything in /proc which gives away the
162 identity of a UML.
163
164 See <http://user-mode-linux.sf.net/hppfs.html> for more information.
165
166 You only need this if you are setting up a UML honeypot. Otherwise,
167 it is safe to say 'N' here.
168
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169config MCONSOLE
170 bool "Management console"
171 default y
172 help
173 The user mode linux management console is a low-level interface to
174 the kernel, somewhat like the i386 SysRq interface. Since there is
175 a full-blown operating system running under every user mode linux
176 instance, there is much greater flexibility possible than with the
177 SysRq mechanism.
178
179 If you answer 'Y' to this option, to use this feature, you need the
180 mconsole client (called uml_mconsole) which is present in CVS in
181 2.4.5-9um and later (path /tools/mconsole), and is also in the
182 distribution RPM package in 2.4.6 and later.
183
184 It is safe to say 'Y' here.
185
186config MAGIC_SYSRQ
187 bool "Magic SysRq key"
188 depends on MCONSOLE
189 ---help---
190 If you say Y here, you will have some control over the system even
191 if the system crashes for example during kernel debugging (e.g., you
192 will be able to flush the buffer cache to disk, reboot the system
193 immediately or dump some status information). A key for each of the
194 possible requests is provided.
195
196 This is the feature normally accomplished by pressing a key
197 while holding SysRq (Alt+PrintScreen).
198
199 On UML, this is accomplished by sending a "sysrq" command with
200 mconsole, followed by the letter for the requested command.
201
202 The keys are documented in <file:Documentation/sysrq.txt>. Don't say Y
203 unless you really know what this hack does.
204
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205config SMP
206 bool "Symmetric multi-processing support (EXPERIMENTAL)"
207 default n
Paolo 'Blaisorblade' Giarrusso3b8d1082005-11-13 16:07:04 -0800208 #SMP_BROKEN is for x86_64.
209 depends on MODE_TT && EXPERIMENTAL && (!SMP_BROKEN || (BROKEN && SMP_BROKEN))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 help
211 This option enables UML SMP support.
212 It is NOT related to having a real SMP box. Not directly, at least.
213
214 UML implements virtual SMP by allowing as many processes to run
215 simultaneously on the host as there are virtual processors configured.
216
217 Obviously, if the host is a uniprocessor, those processes will
218 timeshare, but, inside UML, will appear to be running simultaneously.
219 If the host is a multiprocessor, then UML processes may run
220 simultaneously, depending on the host scheduler.
221
222 This, however, is supported only in TT mode. So, if you use the SKAS
223 patch on your host, switching to TT mode and enabling SMP usually gives
224 you worse performances.
225 Also, since the support for SMP has been under-developed, there could
226 be some bugs being exposed by enabling SMP.
227
228 If you don't know what to do, say N.
229
230config NR_CPUS
231 int "Maximum number of CPUs (2-32)"
232 range 2 32
233 depends on SMP
234 default "32"
235
236config NEST_LEVEL
237 int "Nesting level"
238 default "0"
239 help
240 This is set to the number of layers of UMLs that this UML will be run
241 in. Normally, this is zero, meaning that it will run directly on the
242 host. Setting it to one will build a UML that can run inside a UML
243 that is running on the host. Generally, if you intend this UML to run
244 inside another UML, set CONFIG_NEST_LEVEL to one more than the host
245 UML.
246
247 Note that if the hosting UML has its CONFIG_KERNEL_HALF_GIGS set to
248 greater than one, then the guest UML should have its CONFIG_NEST_LEVEL
249 set to the host's CONFIG_NEST_LEVEL + CONFIG_KERNEL_HALF_GIGS.
250 Only change this if you are running nested UMLs.
251
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252config HIGHMEM
Paolo 'Blaisorblade' Giarrussoce2d2ae2006-01-18 17:42:59 -0800253 bool "Highmem support (EXPERIMENTAL)"
254 depends on !64BIT && EXPERIMENTAL
255 default n
256 help
257 This was used to allow UML to run with big amounts of memory.
258 Currently it is unstable, so if unsure say N.
259
260 To use big amounts of memory, it is recommended to disable TT mode (i.e.
261 CONFIG_MODE_TT) and enable static linking (i.e. CONFIG_STATIC_LINK) -
262 this should allow the guest to use up to 2.75G of memory.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263
264config KERNEL_STACK_ORDER
265 int "Kernel stack size order"
266 default 2
267 help
268 This option determines the size of UML kernel stacks. They will
269 be 1 << order pages. The default is OK unless you're running Valgrind
270 on UML, in which case, set this to 3.
271
272config UML_REAL_TIME_CLOCK
273 bool "Real-time Clock"
274 default y
275 help
276 This option makes UML time deltas match wall clock deltas. This should
277 normally be enabled. The exception would be if you are debugging with
278 UML and spend long times with UML stopped at a breakpoint. In this
279 case, when UML is restarted, it will call the timer enough times to make
280 up for the time spent at the breakpoint. This could result in a
Matt LaPlante44c09202006-10-03 22:34:14 +0200281 noticeable lag. If this is a problem, then disable this option.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282
283endmenu
284
285source "init/Kconfig"
286
Paolo 'Blaisorblade' Giarrussoce2d2ae2006-01-18 17:42:59 -0800287source "drivers/block/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288
Jeff Dike08b178e2005-09-03 15:57:12 -0700289source "arch/um/Kconfig.char"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290
Paolo 'Blaisorblade' Giarrussoce2d2ae2006-01-18 17:42:59 -0800291source "drivers/base/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292
Paolo 'Blaisorblade' Giarrussoce2d2ae2006-01-18 17:42:59 -0800293source "net/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294
Jeff Dike08b178e2005-09-03 15:57:12 -0700295source "arch/um/Kconfig.net"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296
Sam Ravnborgd5950b42005-07-11 21:03:49 -0700297source "drivers/net/Kconfig"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298
Paolo 'Blaisorblade' Giarrusso76c842d2005-12-18 17:50:37 +0100299source "drivers/connector/Kconfig"
300
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301source "fs/Kconfig"
302
303source "security/Kconfig"
304
305source "crypto/Kconfig"
306
307source "lib/Kconfig"
308
309menu "SCSI support"
310depends on BROKEN
311
312config SCSI
313 tristate "SCSI support"
314
315# This gives us free_dma, which scsi.c wants.
316config GENERIC_ISA_DMA
317 bool
318 depends on SCSI
319 default y
320
Jeff Dike08b178e2005-09-03 15:57:12 -0700321source "arch/um/Kconfig.scsi"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322
323endmenu
324
325source "drivers/md/Kconfig"
326
327if BROKEN
328 source "drivers/mtd/Kconfig"
329endif
330
331#This is just to shut up some Kconfig warnings, so no prompt.
332config INPUT
333 bool
334 default n
335
336source "arch/um/Kconfig.debug"