Commit | Line | Data |
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1da177e4 LT |
1 | # |
2 | # For a description of the syntax of this configuration file, | |
3 | # see Documentation/kbuild/kconfig-language.txt. | |
4 | # | |
5 | ||
dbd70fb4 HC |
6 | config SCHED_MC |
7 | def_bool y | |
8 | depends on SMP | |
9 | ||
1da177e4 | 10 | config MMU |
61d48c2c | 11 | def_bool y |
1da177e4 | 12 | |
66701b14 | 13 | config ZONE_DMA |
118bcd31 HC |
14 | def_bool y |
15 | depends on 64BIT | |
66701b14 | 16 | |
2b105ff9 | 17 | config LOCKDEP_SUPPORT |
61d48c2c | 18 | def_bool y |
2b105ff9 | 19 | |
5bdc9b44 | 20 | config STACKTRACE_SUPPORT |
61d48c2c | 21 | def_bool y |
5bdc9b44 | 22 | |
a3afe70b HC |
23 | config HAVE_LATENCYTOP_SUPPORT |
24 | def_bool y | |
25 | ||
1da177e4 LT |
26 | config RWSEM_GENERIC_SPINLOCK |
27 | bool | |
28 | ||
29 | config RWSEM_XCHGADD_ALGORITHM | |
61d48c2c | 30 | def_bool y |
1da177e4 | 31 | |
f0d1b0b3 DH |
32 | config ARCH_HAS_ILOG2_U32 |
33 | bool | |
34 | default n | |
35 | ||
36 | config ARCH_HAS_ILOG2_U64 | |
37 | bool | |
38 | default n | |
39 | ||
7e33db4e | 40 | config GENERIC_HWEIGHT |
61d48c2c | 41 | def_bool y |
7e33db4e | 42 | |
dc64bef5 MS |
43 | config GENERIC_TIME |
44 | def_bool y | |
45 | ||
b020632e MS |
46 | config GENERIC_TIME_VSYSCALL |
47 | def_bool y | |
48 | ||
5a62b192 HC |
49 | config GENERIC_CLOCKEVENTS |
50 | def_bool y | |
51 | ||
c0007f1a HC |
52 | config GENERIC_BUG |
53 | bool | |
54 | depends on BUG | |
55 | default y | |
56 | ||
23db764d | 57 | config NO_IOMEM |
5ea81769 AV |
58 | def_bool y |
59 | ||
411f0f3e HC |
60 | config NO_DMA |
61 | def_bool y | |
62 | ||
b6b40c53 MS |
63 | config GENERIC_LOCKBREAK |
64 | bool | |
65 | default y | |
66 | depends on SMP && PREEMPT | |
67 | ||
402b0862 CO |
68 | config PGSTE |
69 | bool | |
70 | default y if KVM | |
71 | ||
c185b783 MS |
72 | config VIRT_CPU_ACCOUNTING |
73 | def_bool y | |
74 | ||
6a11f75b AM |
75 | config ARCH_SUPPORTS_DEBUG_PAGEALLOC |
76 | def_bool y | |
77 | ||
1da177e4 LT |
78 | mainmenu "Linux Kernel Configuration" |
79 | ||
347a8dc3 | 80 | config S390 |
61d48c2c | 81 | def_bool y |
ca9fc75a | 82 | select USE_GENERIC_SMP_HELPERS if SMP |
ed6bb619 | 83 | select HAVE_SYSCALL_WRAPPERS |
5d360a75 | 84 | select HAVE_FUNCTION_TRACER |
8b4488f8 | 85 | select HAVE_FUNCTION_TRACE_MCOUNT_TEST |
dfd9f7ab | 86 | select HAVE_FTRACE_MCOUNT_RECORD |
9bf1226b | 87 | select HAVE_FTRACE_SYSCALLS |
dfd9f7ab | 88 | select HAVE_DYNAMIC_FTRACE |
88dbd203 | 89 | select HAVE_FUNCTION_GRAPH_TRACER |
36cd3c9f | 90 | select HAVE_DEFAULT_NO_SPIN_MUTEXES |
42d4b839 | 91 | select HAVE_OPROFILE |
3f550096 | 92 | select HAVE_KPROBES |
9edddaa2 | 93 | select HAVE_KRETPROBES |
77b455f1 | 94 | select HAVE_KVM if 64BIT |
753c4dd6 | 95 | select HAVE_ARCH_TRACEHOOK |
98a79d6a | 96 | select INIT_ALL_POSSIBLE |
12310e9c | 97 | select HAVE_PERF_COUNTERS |
25ca1251 | 98 | select GENERIC_ATOMIC64 if !64BIT |
1da177e4 | 99 | |
fca3e357 MS |
100 | config SCHED_OMIT_FRAME_POINTER |
101 | bool | |
102 | default y | |
103 | ||
1da177e4 LT |
104 | source "init/Kconfig" |
105 | ||
dc52ddc0 MH |
106 | source "kernel/Kconfig.freezer" |
107 | ||
1da177e4 LT |
108 | menu "Base setup" |
109 | ||
110 | comment "Processor type and features" | |
111 | ||
5a62b192 HC |
112 | source "kernel/time/Kconfig" |
113 | ||
347a8dc3 | 114 | config 64BIT |
1da177e4 LT |
115 | bool "64 bit kernel" |
116 | help | |
117 | Select this option if you have a 64 bit IBM zSeries machine | |
118 | and want to use the 64 bit addressing mode. | |
119 | ||
d9f7a745 MS |
120 | config 32BIT |
121 | bool | |
122 | default y if !64BIT | |
123 | ||
07606309 MS |
124 | config KTIME_SCALAR |
125 | def_bool 32BIT | |
126 | ||
1da177e4 LT |
127 | config SMP |
128 | bool "Symmetric multi-processing support" | |
129 | ---help--- | |
130 | This enables support for systems with more than one CPU. If you have | |
131 | a system with only one CPU, like most personal computers, say N. If | |
132 | you have a system with more than one CPU, say Y. | |
133 | ||
134 | If you say N here, the kernel will run on single and multiprocessor | |
135 | machines, but will use only one CPU of a multiprocessor machine. If | |
136 | you say Y here, the kernel will run on many, but not all, | |
137 | singleprocessor machines. On a singleprocessor machine, the kernel | |
138 | will run faster if you say N here. | |
139 | ||
03502faa AB |
140 | See also the SMP-HOWTO available at |
141 | <http://www.tldp.org/docs.html#howto>. | |
1da177e4 LT |
142 | |
143 | Even if you don't know what to do here, say Y. | |
144 | ||
145 | config NR_CPUS | |
146 | int "Maximum number of CPUs (2-64)" | |
147 | range 2 64 | |
148 | depends on SMP | |
057c5cb3 HC |
149 | default "32" if !64BIT |
150 | default "64" if 64BIT | |
1da177e4 LT |
151 | help |
152 | This allows you to specify the maximum number of CPUs which this | |
153 | kernel will support. The maximum supported value is 64 and the | |
154 | minimum value which makes sense is 2. | |
155 | ||
156 | This is purely to save memory - each supported CPU adds | |
157 | approximately sixteen kilobytes to the kernel image. | |
158 | ||
159 | config HOTPLUG_CPU | |
160 | bool "Support for hot-pluggable CPUs" | |
161 | depends on SMP | |
162 | select HOTPLUG | |
163 | default n | |
164 | help | |
165 | Say Y here to be able to turn CPUs off and on. CPUs | |
166 | can be controlled through /sys/devices/system/cpu/cpu#. | |
167 | Say N if you want to disable CPU hotplug. | |
168 | ||
169 | config MATHEMU | |
170 | bool "IEEE FPU emulation" | |
171 | depends on MARCH_G5 | |
172 | help | |
173 | This option is required for IEEE compliant floating point arithmetic | |
174 | on older S/390 machines. Say Y unless you know your machine doesn't | |
175 | need this. | |
176 | ||
347a8dc3 | 177 | config COMPAT |
1da177e4 | 178 | bool "Kernel support for 31 bit emulation" |
347a8dc3 | 179 | depends on 64BIT |
63506c41 | 180 | select COMPAT_BINFMT_ELF |
1da177e4 LT |
181 | help |
182 | Select this option if you want to enable your system kernel to | |
183 | handle system-calls from ELF binaries for 31 bit ESA. This option | |
184 | (and some other stuff like libraries and such) is needed for | |
185 | executing 31 bit applications. It is safe to say "Y". | |
186 | ||
1da177e4 LT |
187 | config SYSVIPC_COMPAT |
188 | bool | |
189 | depends on COMPAT && SYSVIPC | |
190 | default y | |
191 | ||
e65e1fc2 AV |
192 | config AUDIT_ARCH |
193 | bool | |
194 | default y | |
195 | ||
c1821c2e GS |
196 | config S390_SWITCH_AMODE |
197 | bool "Switch kernel/user addressing modes" | |
198 | help | |
199 | This option allows to switch the addressing modes of kernel and user | |
200 | space. The kernel parameter switch_amode=on will enable this feature, | |
201 | default is disabled. Enabling this (via kernel parameter) on machines | |
202 | earlier than IBM System z9-109 EC/BC will reduce system performance. | |
203 | ||
204 | Note that this option will also be selected by selecting the execute | |
205 | protection option below. Enabling the execute protection via the | |
206 | noexec kernel parameter will also switch the addressing modes, | |
207 | independent of the switch_amode kernel parameter. | |
208 | ||
209 | ||
210 | config S390_EXEC_PROTECT | |
211 | bool "Data execute protection" | |
212 | select S390_SWITCH_AMODE | |
213 | help | |
214 | This option allows to enable a buffer overflow protection for user | |
215 | space programs and it also selects the addressing mode option above. | |
216 | The kernel parameter noexec=on will enable this feature and also | |
217 | switch the addressing modes, default is disabled. Enabling this (via | |
218 | kernel parameter) on machines earlier than IBM System z9-109 EC/BC | |
219 | will reduce system performance. | |
220 | ||
1da177e4 LT |
221 | comment "Code generation options" |
222 | ||
223 | choice | |
224 | prompt "Processor type" | |
225 | default MARCH_G5 | |
226 | ||
227 | config MARCH_G5 | |
228 | bool "S/390 model G5 and G6" | |
347a8dc3 | 229 | depends on !64BIT |
1da177e4 LT |
230 | help |
231 | Select this to build a 31 bit kernel that works | |
232 | on all S/390 and zSeries machines. | |
233 | ||
234 | config MARCH_Z900 | |
235 | bool "IBM eServer zSeries model z800 and z900" | |
236 | help | |
237 | Select this to optimize for zSeries machines. This | |
238 | will enable some optimizations that are not available | |
239 | on older 31 bit only CPUs. | |
240 | ||
241 | config MARCH_Z990 | |
242 | bool "IBM eServer zSeries model z890 and z990" | |
243 | help | |
244 | Select this enable optimizations for model z890/z990. | |
245 | This will be slightly faster but does not work on | |
246 | older machines such as the z900. | |
247 | ||
0efa4703 CB |
248 | config MARCH_Z9_109 |
249 | bool "IBM System z9" | |
250 | help | |
251 | Select this to enable optimizations for IBM System z9-109, IBM | |
252 | System z9 Enterprise Class (z9 EC), and IBM System z9 Business | |
253 | Class (z9 BC). The kernel will be slightly faster but will not | |
254 | work on older machines such as the z990, z890, z900, and z800. | |
255 | ||
e37f50e1 MS |
256 | config MARCH_Z10 |
257 | bool "IBM System z10" | |
258 | help | |
259 | Select this to enable optimizations for IBM System z10. The | |
260 | kernel will be slightly faster but will not work on older | |
261 | machines such as the z990, z890, z900, z800, z9-109, z9-ec | |
262 | and z9-bc. | |
263 | ||
1da177e4 LT |
264 | endchoice |
265 | ||
266 | config PACK_STACK | |
267 | bool "Pack kernel stack" | |
268 | help | |
269 | This option enables the compiler option -mkernel-backchain if it | |
270 | is available. If the option is available the compiler supports | |
271 | the new stack layout which dramatically reduces the minimum stack | |
272 | frame size. With an old compiler a non-leaf function needs a | |
273 | minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With | |
274 | -mkernel-backchain the minimum size drops to 16 byte on 31 bit | |
275 | and 24 byte on 64 bit. | |
276 | ||
277 | Say Y if you are unsure. | |
278 | ||
279 | config SMALL_STACK | |
7f5a8ba6 HC |
280 | bool "Use 8kb for kernel stack instead of 16kb" |
281 | depends on PACK_STACK && 64BIT && !LOCKDEP | |
1da177e4 LT |
282 | help |
283 | If you say Y here and the compiler supports the -mkernel-backchain | |
7f5a8ba6 HC |
284 | option the kernel will use a smaller kernel stack size. The reduced |
285 | size is 8kb instead of 16kb. This allows to run more threads on a | |
286 | system and reduces the pressure on the memory management for higher | |
287 | order page allocations. | |
1da177e4 LT |
288 | |
289 | Say N if you are unsure. | |
290 | ||
1da177e4 LT |
291 | config CHECK_STACK |
292 | bool "Detect kernel stack overflow" | |
293 | help | |
294 | This option enables the compiler option -mstack-guard and | |
295 | -mstack-size if they are available. If the compiler supports them | |
296 | it will emit additional code to each function prolog to trigger | |
297 | an illegal operation if the kernel stack is about to overflow. | |
298 | ||
299 | Say N if you are unsure. | |
300 | ||
301 | config STACK_GUARD | |
302 | int "Size of the guard area (128-1024)" | |
303 | range 128 1024 | |
304 | depends on CHECK_STACK | |
305 | default "256" | |
306 | help | |
307 | This allows you to specify the size of the guard area at the lower | |
308 | end of the kernel stack. If the kernel stack points into the guard | |
309 | area on function entry an illegal operation is triggered. The size | |
310 | needs to be a power of 2. Please keep in mind that the size of an | |
311 | interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit. | |
312 | The minimum size for the stack guard should be 256 for 31 bit and | |
313 | 512 for 64 bit. | |
314 | ||
315 | config WARN_STACK | |
316 | bool "Emit compiler warnings for function with broken stack usage" | |
317 | help | |
318 | This option enables the compiler options -mwarn-framesize and | |
319 | -mwarn-dynamicstack. If the compiler supports these options it | |
320 | will generate warnings for function which either use alloca or | |
025dfdaf | 321 | create a stack frame bigger than CONFIG_WARN_STACK_SIZE. |
1da177e4 LT |
322 | |
323 | Say N if you are unsure. | |
324 | ||
325 | config WARN_STACK_SIZE | |
326 | int "Maximum frame size considered safe (128-2048)" | |
327 | range 128 2048 | |
328 | depends on WARN_STACK | |
c5a37255 | 329 | default "2048" |
1da177e4 LT |
330 | help |
331 | This allows you to specify the maximum frame size a function may | |
332 | have without the compiler complaining about it. | |
333 | ||
39b742f9 HC |
334 | config ARCH_POPULATES_NODE_MAP |
335 | def_bool y | |
336 | ||
61d48c2c MS |
337 | comment "Kernel preemption" |
338 | ||
339 | source "kernel/Kconfig.preempt" | |
340 | ||
17f34580 HC |
341 | config ARCH_SPARSEMEM_ENABLE |
342 | def_bool y | |
343 | select SPARSEMEM_VMEMMAP_ENABLE | |
344 | select SPARSEMEM_VMEMMAP | |
148f1678 | 345 | select SPARSEMEM_STATIC if !64BIT |
17f34580 HC |
346 | |
347 | config ARCH_SPARSEMEM_DEFAULT | |
348 | def_bool y | |
349 | ||
97195d6b HJP |
350 | config ARCH_SELECT_MEMORY_MODEL |
351 | def_bool y | |
352 | ||
421c175c HC |
353 | config ARCH_ENABLE_MEMORY_HOTPLUG |
354 | def_bool y | |
355 | depends on SPARSEMEM | |
356 | ||
7e9238fb GS |
357 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
358 | def_bool y | |
359 | ||
155af2f9 HJP |
360 | config ARCH_HIBERNATION_POSSIBLE |
361 | def_bool y if 64BIT | |
362 | ||
3f22ab27 DH |
363 | source "mm/Kconfig" |
364 | ||
1da177e4 LT |
365 | comment "I/O subsystem configuration" |
366 | ||
1da177e4 LT |
367 | config QDIO |
368 | tristate "QDIO support" | |
369 | ---help--- | |
8129ee16 | 370 | This driver provides the Queued Direct I/O base support for |
efca13bc | 371 | IBM System z. |
1da177e4 LT |
372 | |
373 | To compile this driver as a module, choose M here: the | |
374 | module will be called qdio. | |
375 | ||
376 | If unsure, say Y. | |
377 | ||
9d92a7e1 CH |
378 | config CHSC_SCH |
379 | tristate "Support for CHSC subchannels" | |
380 | help | |
381 | This driver allows usage of CHSC subchannels. A CHSC subchannel | |
382 | is usually present on LPAR only. | |
383 | The driver creates a device /dev/chsc, which may be used to | |
384 | obtain I/O configuration information about the machine and | |
385 | to issue asynchronous chsc commands (DANGEROUS). | |
386 | You will usually only want to use this interface on a special | |
387 | LPAR designated for system management. | |
388 | ||
389 | To compile this driver as a module, choose M here: the | |
390 | module will be called chsc_sch. | |
391 | ||
392 | If unsure, say N. | |
393 | ||
1da177e4 LT |
394 | comment "Misc" |
395 | ||
1da177e4 LT |
396 | config IPL |
397 | bool "Builtin IPL record support" | |
398 | help | |
399 | If you want to use the produced kernel to IPL directly from a | |
400 | device, you have to merge a bootsector specific to the device | |
401 | into the first bytes of the kernel. You will have to select the | |
402 | IPL device. | |
403 | ||
404 | choice | |
405 | prompt "IPL method generated into head.S" | |
406 | depends on IPL | |
46e7951f | 407 | default IPL_VM |
1da177e4 LT |
408 | help |
409 | Select "tape" if you want to IPL the image from a Tape. | |
410 | ||
411 | Select "vm_reader" if you are running under VM/ESA and want | |
412 | to IPL the image from the emulated card reader. | |
413 | ||
414 | config IPL_TAPE | |
415 | bool "tape" | |
416 | ||
417 | config IPL_VM | |
418 | bool "vm_reader" | |
419 | ||
420 | endchoice | |
421 | ||
422 | source "fs/Kconfig.binfmt" | |
423 | ||
684de39b HC |
424 | config FORCE_MAX_ZONEORDER |
425 | int | |
426 | default "9" | |
427 | ||
1da177e4 LT |
428 | config PROCESS_DEBUG |
429 | bool "Show crashed user process info" | |
430 | help | |
431 | Say Y to print all process fault locations to the console. This is | |
432 | a debugging option; you probably do not want to set it unless you | |
433 | are an S390 port maintainer. | |
434 | ||
435 | config PFAULT | |
436 | bool "Pseudo page fault support" | |
437 | help | |
438 | Select this option, if you want to use PFAULT pseudo page fault | |
439 | handling under VM. If running native or in LPAR, this option | |
440 | has no effect. If your VM does not support PFAULT, PAGEEX | |
441 | pseudo page fault handling will be used. | |
442 | Note that VM 4.2 supports PFAULT but has a bug in its | |
443 | implementation that causes some problems. | |
444 | Everybody who wants to run Linux under VM != VM4.2 should select | |
445 | this option. | |
446 | ||
447 | config SHARED_KERNEL | |
448 | bool "VM shared kernel support" | |
449 | help | |
450 | Select this option, if you want to share the text segment of the | |
451 | Linux kernel between different VM guests. This reduces memory | |
452 | usage with lots of guests but greatly increases kernel size. | |
9c9c1761 HC |
453 | Also if a kernel was IPL'ed from a shared segment the kexec system |
454 | call will not work. | |
1da177e4 LT |
455 | You should only select this option if you know what you are |
456 | doing and want to exploit this feature. | |
457 | ||
458 | config CMM | |
459 | tristate "Cooperative memory management" | |
460 | help | |
461 | Select this option, if you want to enable the kernel interface | |
462 | to reduce the memory size of the system. This is accomplished | |
463 | by allocating pages of memory and put them "on hold". This only | |
464 | makes sense for a system running under VM where the unused pages | |
465 | will be reused by VM for other guest systems. The interface | |
466 | allows an external monitor to balance memory of many systems. | |
467 | Everybody who wants to run Linux under VM should select this | |
468 | option. | |
469 | ||
470 | config CMM_PROC | |
471 | bool "/proc interface to cooperative memory management" | |
472 | depends on CMM | |
473 | help | |
474 | Select this option to enable the /proc interface to the | |
475 | cooperative memory management. | |
476 | ||
477 | config CMM_IUCV | |
478 | bool "IUCV special message interface to cooperative memory management" | |
479 | depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV) | |
480 | help | |
481 | Select this option to enable the special message interface to | |
482 | the cooperative memory management. | |
483 | ||
45e576b1 MS |
484 | config PAGE_STATES |
485 | bool "Unused page notification" | |
486 | help | |
487 | This enables the notification of unused pages to the | |
488 | hypervisor. The ESSA instruction is used to do the states | |
489 | changes between a page that has content and the unused state. | |
490 | ||
1da177e4 LT |
491 | config APPLDATA_BASE |
492 | bool "Linux - VM Monitor Stream, base infrastructure" | |
c185b783 | 493 | depends on PROC_FS |
1da177e4 LT |
494 | help |
495 | This provides a kernel interface for creating and updating z/VM APPLDATA | |
496 | monitor records. The monitor records are updated at certain time | |
497 | intervals, once the timer is started. | |
498 | Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer, | |
499 | i.e. enables or disables monitoring on the Linux side. | |
500 | A custom interval value (in seconds) can be written to | |
501 | /proc/appldata/interval. | |
502 | ||
503 | Defaults are 60 seconds interval and timer off. | |
504 | The /proc entries can also be read from, showing the current settings. | |
505 | ||
506 | config APPLDATA_MEM | |
507 | tristate "Monitor memory management statistics" | |
62fb2ba3 | 508 | depends on APPLDATA_BASE && VM_EVENT_COUNTERS |
1da177e4 LT |
509 | help |
510 | This provides memory management related data to the Linux - VM Monitor | |
511 | Stream, like paging/swapping rate, memory utilisation, etc. | |
512 | Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM | |
513 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
514 | on the z/VM side. | |
515 | ||
516 | Default is disabled. | |
517 | The /proc entry can also be read from, showing the current settings. | |
518 | ||
519 | This can also be compiled as a module, which will be called | |
520 | appldata_mem.o. | |
521 | ||
522 | config APPLDATA_OS | |
523 | tristate "Monitor OS statistics" | |
524 | depends on APPLDATA_BASE | |
525 | help | |
526 | This provides OS related data to the Linux - VM Monitor Stream, like | |
527 | CPU utilisation, etc. | |
528 | Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM | |
529 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
530 | on the z/VM side. | |
531 | ||
532 | Default is disabled. | |
533 | This can also be compiled as a module, which will be called | |
534 | appldata_os.o. | |
535 | ||
536 | config APPLDATA_NET_SUM | |
537 | tristate "Monitor overall network statistics" | |
70193af9 | 538 | depends on APPLDATA_BASE && NET |
1da177e4 LT |
539 | help |
540 | This provides network related data to the Linux - VM Monitor Stream, | |
541 | currently there is only a total sum of network I/O statistics, no | |
542 | per-interface data. | |
543 | Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM | |
544 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
545 | on the z/VM side. | |
546 | ||
547 | Default is disabled. | |
548 | This can also be compiled as a module, which will be called | |
549 | appldata_net_sum.o. | |
550 | ||
61d48c2c MS |
551 | source kernel/Kconfig.hz |
552 | ||
24bbb1fa MH |
553 | config S390_HYPFS_FS |
554 | bool "s390 hypervisor file system support" | |
555 | select SYS_HYPERVISOR | |
556 | default y | |
557 | help | |
558 | This is a virtual file system intended to provide accounting | |
559 | information in an s390 hypervisor environment. | |
560 | ||
cf13f0ea | 561 | config KEXEC |
07d43ce6 | 562 | bool "kexec system call" |
cf13f0ea HC |
563 | help |
564 | kexec is a system call that implements the ability to shutdown your | |
565 | current kernel, and to start another kernel. It is like a reboot | |
566 | but is independent of hardware/microcode support. | |
567 | ||
411ed322 | 568 | config ZFCPDUMP |
59f2e69d | 569 | bool "zfcpdump support" |
411ed322 MH |
570 | select SMP |
571 | default n | |
572 | help | |
573 | Select this option if you want to build an zfcpdump enabled kernel. | |
e403149c | 574 | Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this. |
411ed322 | 575 | |
fa587743 | 576 | config S390_GUEST |
20766c08 | 577 | bool "s390 guest support for KVM (EXPERIMENTAL)" |
fa587743 CO |
578 | depends on 64BIT && EXPERIMENTAL |
579 | select VIRTIO | |
580 | select VIRTIO_RING | |
faeba830 | 581 | select VIRTIO_CONSOLE |
fa587743 | 582 | help |
20766c08 CB |
583 | Select this option if you want to run the kernel as a guest under |
584 | the KVM hypervisor. This will add detection for KVM as well as a | |
585 | virtio transport. If KVM is detected, the virtio console will be | |
586 | the default console. | |
bcf5cef7 HC |
587 | |
588 | config SECCOMP | |
589 | bool "Enable seccomp to safely compute untrusted bytecode" | |
590 | depends on PROC_FS | |
591 | default y | |
592 | help | |
593 | This kernel feature is useful for number crunching applications | |
594 | that may need to compute untrusted bytecode during their | |
595 | execution. By using pipes or other transports made available to | |
596 | the process as file descriptors supporting the read/write | |
597 | syscalls, it's possible to isolate those applications in | |
598 | their own address space using seccomp. Once seccomp is | |
599 | enabled via /proc/<pid>/seccomp, it cannot be disabled | |
600 | and the task is only allowed to execute a few safe syscalls | |
601 | defined by each seccomp mode. | |
602 | ||
603 | If unsure, say Y. | |
604 | ||
1da177e4 LT |
605 | endmenu |
606 | ||
155af2f9 HJP |
607 | menu "Power Management" |
608 | ||
609 | source "kernel/power/Kconfig" | |
610 | ||
611 | endmenu | |
612 | ||
d5950b43 SR |
613 | source "net/Kconfig" |
614 | ||
1da177e4 | 615 | config PCMCIA |
61d48c2c | 616 | def_bool n |
1da177e4 | 617 | |
61d48c2c MS |
618 | config CCW |
619 | def_bool y | |
1da177e4 | 620 | |
61d48c2c | 621 | source "drivers/Kconfig" |
1da177e4 LT |
622 | |
623 | source "fs/Kconfig" | |
624 | ||
1da177e4 LT |
625 | source "arch/s390/Kconfig.debug" |
626 | ||
627 | source "security/Kconfig" | |
628 | ||
629 | source "crypto/Kconfig" | |
630 | ||
631 | source "lib/Kconfig" | |
77b455f1 CB |
632 | |
633 | source "arch/s390/kvm/Kconfig" |