]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | # |
2 | # For a description of the syntax of this configuration file, | |
3 | # see Documentation/kbuild/kconfig-language.txt. | |
4 | # | |
5 | ||
6 | config MMU | |
7 | bool | |
8 | default y | |
9 | ||
10 | config RWSEM_GENERIC_SPINLOCK | |
11 | bool | |
12 | ||
13 | config RWSEM_XCHGADD_ALGORITHM | |
14 | bool | |
15 | default y | |
16 | ||
17 | config GENERIC_CALIBRATE_DELAY | |
18 | bool | |
19 | default y | |
20 | ||
21 | config GENERIC_BUST_SPINLOCK | |
22 | bool | |
23 | ||
24 | mainmenu "Linux Kernel Configuration" | |
25 | ||
26 | config ARCH_S390 | |
27 | bool | |
28 | default y | |
29 | ||
30 | config UID16 | |
31 | bool | |
32 | default y | |
33 | depends on ARCH_S390X = 'n' | |
34 | ||
35 | source "init/Kconfig" | |
36 | ||
37 | menu "Base setup" | |
38 | ||
39 | comment "Processor type and features" | |
40 | ||
41 | config ARCH_S390X | |
42 | bool "64 bit kernel" | |
43 | help | |
44 | Select this option if you have a 64 bit IBM zSeries machine | |
45 | and want to use the 64 bit addressing mode. | |
46 | ||
47 | config 64BIT | |
48 | def_bool ARCH_S390X | |
49 | ||
50 | config ARCH_S390_31 | |
51 | bool | |
52 | depends on ARCH_S390X = 'n' | |
53 | default y | |
54 | ||
55 | config SMP | |
56 | bool "Symmetric multi-processing support" | |
57 | ---help--- | |
58 | This enables support for systems with more than one CPU. If you have | |
59 | a system with only one CPU, like most personal computers, say N. If | |
60 | you have a system with more than one CPU, say Y. | |
61 | ||
62 | If you say N here, the kernel will run on single and multiprocessor | |
63 | machines, but will use only one CPU of a multiprocessor machine. If | |
64 | you say Y here, the kernel will run on many, but not all, | |
65 | singleprocessor machines. On a singleprocessor machine, the kernel | |
66 | will run faster if you say N here. | |
67 | ||
68 | See also the <file:Documentation/smp.txt> and the SMP-HOWTO | |
69 | available at <http://www.tldp.org/docs.html#howto>. | |
70 | ||
71 | Even if you don't know what to do here, say Y. | |
72 | ||
73 | config NR_CPUS | |
74 | int "Maximum number of CPUs (2-64)" | |
75 | range 2 64 | |
76 | depends on SMP | |
77 | default "32" | |
78 | help | |
79 | This allows you to specify the maximum number of CPUs which this | |
80 | kernel will support. The maximum supported value is 64 and the | |
81 | minimum value which makes sense is 2. | |
82 | ||
83 | This is purely to save memory - each supported CPU adds | |
84 | approximately sixteen kilobytes to the kernel image. | |
85 | ||
86 | config HOTPLUG_CPU | |
87 | bool "Support for hot-pluggable CPUs" | |
88 | depends on SMP | |
89 | select HOTPLUG | |
90 | default n | |
91 | help | |
92 | Say Y here to be able to turn CPUs off and on. CPUs | |
93 | can be controlled through /sys/devices/system/cpu/cpu#. | |
94 | Say N if you want to disable CPU hotplug. | |
95 | ||
96 | config MATHEMU | |
97 | bool "IEEE FPU emulation" | |
98 | depends on MARCH_G5 | |
99 | help | |
100 | This option is required for IEEE compliant floating point arithmetic | |
101 | on older S/390 machines. Say Y unless you know your machine doesn't | |
102 | need this. | |
103 | ||
104 | config S390_SUPPORT | |
105 | bool "Kernel support for 31 bit emulation" | |
106 | depends on ARCH_S390X | |
107 | help | |
108 | Select this option if you want to enable your system kernel to | |
109 | handle system-calls from ELF binaries for 31 bit ESA. This option | |
110 | (and some other stuff like libraries and such) is needed for | |
111 | executing 31 bit applications. It is safe to say "Y". | |
112 | ||
113 | config COMPAT | |
114 | bool | |
115 | depends on S390_SUPPORT | |
116 | default y | |
117 | ||
118 | config SYSVIPC_COMPAT | |
119 | bool | |
120 | depends on COMPAT && SYSVIPC | |
121 | default y | |
122 | ||
123 | config BINFMT_ELF32 | |
124 | tristate "Kernel support for 31 bit ELF binaries" | |
125 | depends on S390_SUPPORT | |
126 | help | |
127 | This allows you to run 32-bit Linux/ELF binaries on your zSeries | |
128 | in 64 bit mode. Everybody wants this; say Y. | |
129 | ||
130 | comment "Code generation options" | |
131 | ||
132 | choice | |
133 | prompt "Processor type" | |
134 | default MARCH_G5 | |
135 | ||
136 | config MARCH_G5 | |
137 | bool "S/390 model G5 and G6" | |
138 | depends on ARCH_S390_31 | |
139 | help | |
140 | Select this to build a 31 bit kernel that works | |
141 | on all S/390 and zSeries machines. | |
142 | ||
143 | config MARCH_Z900 | |
144 | bool "IBM eServer zSeries model z800 and z900" | |
145 | help | |
146 | Select this to optimize for zSeries machines. This | |
147 | will enable some optimizations that are not available | |
148 | on older 31 bit only CPUs. | |
149 | ||
150 | config MARCH_Z990 | |
151 | bool "IBM eServer zSeries model z890 and z990" | |
152 | help | |
153 | Select this enable optimizations for model z890/z990. | |
154 | This will be slightly faster but does not work on | |
155 | older machines such as the z900. | |
156 | ||
157 | endchoice | |
158 | ||
159 | config PACK_STACK | |
160 | bool "Pack kernel stack" | |
161 | help | |
162 | This option enables the compiler option -mkernel-backchain if it | |
163 | is available. If the option is available the compiler supports | |
164 | the new stack layout which dramatically reduces the minimum stack | |
165 | frame size. With an old compiler a non-leaf function needs a | |
166 | minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With | |
167 | -mkernel-backchain the minimum size drops to 16 byte on 31 bit | |
168 | and 24 byte on 64 bit. | |
169 | ||
170 | Say Y if you are unsure. | |
171 | ||
172 | config SMALL_STACK | |
173 | bool "Use 4kb/8kb for kernel stack instead of 8kb/16kb" | |
174 | depends on PACK_STACK | |
175 | help | |
176 | If you say Y here and the compiler supports the -mkernel-backchain | |
177 | option the kernel will use a smaller kernel stack size. For 31 bit | |
178 | the reduced size is 4kb instead of 8kb and for 64 bit it is 8kb | |
179 | instead of 16kb. This allows to run more thread on a system and | |
180 | reduces the pressure on the memory management for higher order | |
181 | page allocations. | |
182 | ||
183 | Say N if you are unsure. | |
184 | ||
185 | ||
186 | config CHECK_STACK | |
187 | bool "Detect kernel stack overflow" | |
188 | help | |
189 | This option enables the compiler option -mstack-guard and | |
190 | -mstack-size if they are available. If the compiler supports them | |
191 | it will emit additional code to each function prolog to trigger | |
192 | an illegal operation if the kernel stack is about to overflow. | |
193 | ||
194 | Say N if you are unsure. | |
195 | ||
196 | config STACK_GUARD | |
197 | int "Size of the guard area (128-1024)" | |
198 | range 128 1024 | |
199 | depends on CHECK_STACK | |
200 | default "256" | |
201 | help | |
202 | This allows you to specify the size of the guard area at the lower | |
203 | end of the kernel stack. If the kernel stack points into the guard | |
204 | area on function entry an illegal operation is triggered. The size | |
205 | needs to be a power of 2. Please keep in mind that the size of an | |
206 | interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit. | |
207 | The minimum size for the stack guard should be 256 for 31 bit and | |
208 | 512 for 64 bit. | |
209 | ||
210 | config WARN_STACK | |
211 | bool "Emit compiler warnings for function with broken stack usage" | |
212 | help | |
213 | This option enables the compiler options -mwarn-framesize and | |
214 | -mwarn-dynamicstack. If the compiler supports these options it | |
215 | will generate warnings for function which either use alloca or | |
216 | create a stack frame bigger then CONFIG_WARN_STACK_SIZE. | |
217 | ||
218 | Say N if you are unsure. | |
219 | ||
220 | config WARN_STACK_SIZE | |
221 | int "Maximum frame size considered safe (128-2048)" | |
222 | range 128 2048 | |
223 | depends on WARN_STACK | |
224 | default "256" | |
225 | help | |
226 | This allows you to specify the maximum frame size a function may | |
227 | have without the compiler complaining about it. | |
228 | ||
3f22ab27 DH |
229 | source "mm/Kconfig" |
230 | ||
1da177e4 LT |
231 | comment "I/O subsystem configuration" |
232 | ||
233 | config MACHCHK_WARNING | |
234 | bool "Process warning machine checks" | |
235 | help | |
236 | Select this option if you want the machine check handler on IBM S/390 or | |
237 | zSeries to process warning machine checks (e.g. on power failures). | |
238 | If unsure, say "Y". | |
239 | ||
240 | config QDIO | |
241 | tristate "QDIO support" | |
242 | ---help--- | |
243 | This driver provides the Queued Direct I/O base support for the | |
244 | IBM S/390 (G5 and G6) and eServer zSeries (z800, z890, z900 and z990). | |
245 | ||
246 | For details please refer to the documentation provided by IBM at | |
247 | <http://www10.software.ibm.com/developerworks/opensource/linux390> | |
248 | ||
249 | To compile this driver as a module, choose M here: the | |
250 | module will be called qdio. | |
251 | ||
252 | If unsure, say Y. | |
253 | ||
254 | config QDIO_PERF_STATS | |
255 | bool "Performance statistics in /proc" | |
256 | depends on QDIO | |
257 | help | |
258 | Say Y here to get performance statistics in /proc/qdio_perf | |
259 | ||
260 | If unsure, say N. | |
261 | ||
262 | config QDIO_DEBUG | |
263 | bool "Extended debugging information" | |
264 | depends on QDIO | |
265 | help | |
266 | Say Y here to get extended debugging output in /proc/s390dbf/qdio... | |
267 | Warning: this option reduces the performance of the QDIO module. | |
268 | ||
269 | If unsure, say N. | |
270 | ||
271 | comment "Misc" | |
272 | ||
273 | config PREEMPT | |
274 | bool "Preemptible Kernel" | |
275 | help | |
276 | This option reduces the latency of the kernel when reacting to | |
277 | real-time or interactive events by allowing a low priority process to | |
278 | be preempted even if it is in kernel mode executing a system call. | |
279 | This allows applications to run more reliably even when the system is | |
280 | under load. | |
281 | ||
282 | Say N if you are unsure. | |
283 | ||
284 | config IPL | |
285 | bool "Builtin IPL record support" | |
286 | help | |
287 | If you want to use the produced kernel to IPL directly from a | |
288 | device, you have to merge a bootsector specific to the device | |
289 | into the first bytes of the kernel. You will have to select the | |
290 | IPL device. | |
291 | ||
292 | choice | |
293 | prompt "IPL method generated into head.S" | |
294 | depends on IPL | |
295 | default IPL_TAPE | |
296 | help | |
297 | Select "tape" if you want to IPL the image from a Tape. | |
298 | ||
299 | Select "vm_reader" if you are running under VM/ESA and want | |
300 | to IPL the image from the emulated card reader. | |
301 | ||
302 | config IPL_TAPE | |
303 | bool "tape" | |
304 | ||
305 | config IPL_VM | |
306 | bool "vm_reader" | |
307 | ||
308 | endchoice | |
309 | ||
310 | source "fs/Kconfig.binfmt" | |
311 | ||
312 | config PROCESS_DEBUG | |
313 | bool "Show crashed user process info" | |
314 | help | |
315 | Say Y to print all process fault locations to the console. This is | |
316 | a debugging option; you probably do not want to set it unless you | |
317 | are an S390 port maintainer. | |
318 | ||
319 | config PFAULT | |
320 | bool "Pseudo page fault support" | |
321 | help | |
322 | Select this option, if you want to use PFAULT pseudo page fault | |
323 | handling under VM. If running native or in LPAR, this option | |
324 | has no effect. If your VM does not support PFAULT, PAGEEX | |
325 | pseudo page fault handling will be used. | |
326 | Note that VM 4.2 supports PFAULT but has a bug in its | |
327 | implementation that causes some problems. | |
328 | Everybody who wants to run Linux under VM != VM4.2 should select | |
329 | this option. | |
330 | ||
331 | config SHARED_KERNEL | |
332 | bool "VM shared kernel support" | |
333 | help | |
334 | Select this option, if you want to share the text segment of the | |
335 | Linux kernel between different VM guests. This reduces memory | |
336 | usage with lots of guests but greatly increases kernel size. | |
337 | You should only select this option if you know what you are | |
338 | doing and want to exploit this feature. | |
339 | ||
340 | config CMM | |
341 | tristate "Cooperative memory management" | |
342 | help | |
343 | Select this option, if you want to enable the kernel interface | |
344 | to reduce the memory size of the system. This is accomplished | |
345 | by allocating pages of memory and put them "on hold". This only | |
346 | makes sense for a system running under VM where the unused pages | |
347 | will be reused by VM for other guest systems. The interface | |
348 | allows an external monitor to balance memory of many systems. | |
349 | Everybody who wants to run Linux under VM should select this | |
350 | option. | |
351 | ||
352 | config CMM_PROC | |
353 | bool "/proc interface to cooperative memory management" | |
354 | depends on CMM | |
355 | help | |
356 | Select this option to enable the /proc interface to the | |
357 | cooperative memory management. | |
358 | ||
359 | config CMM_IUCV | |
360 | bool "IUCV special message interface to cooperative memory management" | |
361 | depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV) | |
362 | help | |
363 | Select this option to enable the special message interface to | |
364 | the cooperative memory management. | |
365 | ||
366 | config VIRT_TIMER | |
367 | bool "Virtual CPU timer support" | |
368 | help | |
369 | This provides a kernel interface for virtual CPU timers. | |
370 | Default is disabled. | |
371 | ||
372 | config VIRT_CPU_ACCOUNTING | |
373 | bool "Base user process accounting on virtual cpu timer" | |
374 | depends on VIRT_TIMER | |
375 | help | |
376 | Select this option to use CPU timer deltas to do user | |
377 | process accounting. | |
378 | ||
379 | config APPLDATA_BASE | |
380 | bool "Linux - VM Monitor Stream, base infrastructure" | |
381 | depends on PROC_FS && VIRT_TIMER=y | |
382 | help | |
383 | This provides a kernel interface for creating and updating z/VM APPLDATA | |
384 | monitor records. The monitor records are updated at certain time | |
385 | intervals, once the timer is started. | |
386 | Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer, | |
387 | i.e. enables or disables monitoring on the Linux side. | |
388 | A custom interval value (in seconds) can be written to | |
389 | /proc/appldata/interval. | |
390 | ||
391 | Defaults are 60 seconds interval and timer off. | |
392 | The /proc entries can also be read from, showing the current settings. | |
393 | ||
394 | config APPLDATA_MEM | |
395 | tristate "Monitor memory management statistics" | |
396 | depends on APPLDATA_BASE | |
397 | help | |
398 | This provides memory management related data to the Linux - VM Monitor | |
399 | Stream, like paging/swapping rate, memory utilisation, etc. | |
400 | Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM | |
401 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
402 | on the z/VM side. | |
403 | ||
404 | Default is disabled. | |
405 | The /proc entry can also be read from, showing the current settings. | |
406 | ||
407 | This can also be compiled as a module, which will be called | |
408 | appldata_mem.o. | |
409 | ||
410 | config APPLDATA_OS | |
411 | tristate "Monitor OS statistics" | |
412 | depends on APPLDATA_BASE | |
413 | help | |
414 | This provides OS related data to the Linux - VM Monitor Stream, like | |
415 | CPU utilisation, etc. | |
416 | Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM | |
417 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
418 | on the z/VM side. | |
419 | ||
420 | Default is disabled. | |
421 | This can also be compiled as a module, which will be called | |
422 | appldata_os.o. | |
423 | ||
424 | config APPLDATA_NET_SUM | |
425 | tristate "Monitor overall network statistics" | |
426 | depends on APPLDATA_BASE | |
427 | help | |
428 | This provides network related data to the Linux - VM Monitor Stream, | |
429 | currently there is only a total sum of network I/O statistics, no | |
430 | per-interface data. | |
431 | Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM | |
432 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
433 | on the z/VM side. | |
434 | ||
435 | Default is disabled. | |
436 | This can also be compiled as a module, which will be called | |
437 | appldata_net_sum.o. | |
438 | ||
439 | config NO_IDLE_HZ | |
440 | bool "No HZ timer ticks in idle" | |
441 | help | |
442 | Switches the regular HZ timer off when the system is going idle. | |
443 | This helps z/VM to detect that the Linux system is idle. VM can | |
444 | then "swap-out" this guest which reduces memory usage. It also | |
445 | reduces the overhead of idle systems. | |
446 | ||
447 | The HZ timer can be switched on/off via /proc/sys/kernel/hz_timer. | |
448 | hz_timer=0 means HZ timer is disabled. hz_timer=1 means HZ | |
449 | timer is active. | |
450 | ||
451 | config NO_IDLE_HZ_INIT | |
452 | bool "HZ timer in idle off by default" | |
453 | depends on NO_IDLE_HZ | |
454 | help | |
455 | The HZ timer is switched off in idle by default. That means the | |
456 | HZ timer is already disabled at boot time. | |
457 | ||
cf13f0ea HC |
458 | config KEXEC |
459 | bool "kexec system call (EXPERIMENTAL)" | |
460 | depends on EXPERIMENTAL | |
461 | help | |
462 | kexec is a system call that implements the ability to shutdown your | |
463 | current kernel, and to start another kernel. It is like a reboot | |
464 | but is independent of hardware/microcode support. | |
465 | ||
1da177e4 LT |
466 | endmenu |
467 | ||
d5950b43 SR |
468 | source "net/Kconfig" |
469 | ||
1da177e4 LT |
470 | config PCMCIA |
471 | bool | |
472 | default n | |
473 | ||
474 | source "drivers/base/Kconfig" | |
475 | ||
476 | source "drivers/scsi/Kconfig" | |
477 | ||
478 | source "drivers/s390/Kconfig" | |
479 | ||
d5950b43 | 480 | source "drivers/net/Kconfig" |
1da177e4 LT |
481 | |
482 | source "fs/Kconfig" | |
483 | ||
484 | source "arch/s390/oprofile/Kconfig" | |
485 | ||
486 | source "arch/s390/Kconfig.debug" | |
487 | ||
488 | source "security/Kconfig" | |
489 | ||
490 | source "crypto/Kconfig" | |
491 | ||
492 | source "lib/Kconfig" |