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Commit | Line | Data |
---|---|---|
1da177e4 | 1 | config MMU |
61d48c2c | 2 | def_bool y |
1da177e4 | 3 | |
66701b14 | 4 | config ZONE_DMA |
69dbb2f7 | 5 | def_bool y |
66701b14 | 6 | |
2b105ff9 | 7 | config LOCKDEP_SUPPORT |
61d48c2c | 8 | def_bool y |
2b105ff9 | 9 | |
5bdc9b44 | 10 | config STACKTRACE_SUPPORT |
61d48c2c | 11 | def_bool y |
5bdc9b44 | 12 | |
a3afe70b HC |
13 | config HAVE_LATENCYTOP_SUPPORT |
14 | def_bool y | |
15 | ||
1da177e4 LT |
16 | config RWSEM_GENERIC_SPINLOCK |
17 | bool | |
18 | ||
19 | config RWSEM_XCHGADD_ALGORITHM | |
61d48c2c | 20 | def_bool y |
1da177e4 | 21 | |
f0d1b0b3 | 22 | config ARCH_HAS_ILOG2_U32 |
6f9a3c33 | 23 | def_bool n |
f0d1b0b3 DH |
24 | |
25 | config ARCH_HAS_ILOG2_U64 | |
6f9a3c33 | 26 | def_bool n |
f0d1b0b3 | 27 | |
7e33db4e | 28 | config GENERIC_HWEIGHT |
61d48c2c | 29 | def_bool y |
7e33db4e | 30 | |
c0007f1a | 31 | config GENERIC_BUG |
6f9a3c33 | 32 | def_bool y if BUG |
c0007f1a | 33 | |
52499f40 HC |
34 | config GENERIC_BUG_RELATIVE_POINTERS |
35 | def_bool y | |
36 | ||
eca577ef FT |
37 | config ARCH_DMA_ADDR_T_64BIT |
38 | def_bool 64BIT | |
39 | ||
b6b40c53 | 40 | config GENERIC_LOCKBREAK |
6f9a3c33 | 41 | def_bool y if SMP && PREEMPT |
b6b40c53 | 42 | |
402b0862 | 43 | config PGSTE |
6f9a3c33 | 44 | def_bool y if KVM |
402b0862 | 45 | |
6a11f75b AM |
46 | config ARCH_SUPPORTS_DEBUG_PAGEALLOC |
47 | def_bool y | |
48 | ||
843c48fd JG |
49 | config KEXEC |
50 | def_bool y | |
51 | ||
52 | config AUDIT_ARCH | |
53 | def_bool y | |
54 | ||
ce816fa8 | 55 | config NO_IOPORT_MAP |
c8717a3d JG |
56 | def_bool y |
57 | ||
58 | config PCI_QUIRKS | |
59 | def_bool n | |
60 | ||
2a0a5b22 JW |
61 | config ARCH_SUPPORTS_UPROBES |
62 | def_bool 64BIT | |
63 | ||
347a8dc3 | 64 | config S390 |
61d48c2c | 65 | def_bool y |
0e0d04a8 | 66 | select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE |
93bead43 | 67 | select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS |
957e3fac | 68 | select ARCH_HAS_GCOV_PROFILE_ALL |
47523c98 | 69 | select ARCH_HAS_SG_CHAIN |
0e0d04a8 | 70 | select ARCH_HAVE_NMI_SAFE_CMPXCHG |
6beb0009 TG |
71 | select ARCH_INLINE_READ_LOCK |
72 | select ARCH_INLINE_READ_LOCK_BH | |
73 | select ARCH_INLINE_READ_LOCK_IRQ | |
74 | select ARCH_INLINE_READ_LOCK_IRQSAVE | |
0e0d04a8 | 75 | select ARCH_INLINE_READ_TRYLOCK |
6beb0009 TG |
76 | select ARCH_INLINE_READ_UNLOCK |
77 | select ARCH_INLINE_READ_UNLOCK_BH | |
78 | select ARCH_INLINE_READ_UNLOCK_IRQ | |
79 | select ARCH_INLINE_READ_UNLOCK_IRQRESTORE | |
0e0d04a8 HC |
80 | select ARCH_INLINE_SPIN_LOCK |
81 | select ARCH_INLINE_SPIN_LOCK_BH | |
82 | select ARCH_INLINE_SPIN_LOCK_IRQ | |
83 | select ARCH_INLINE_SPIN_LOCK_IRQSAVE | |
84 | select ARCH_INLINE_SPIN_TRYLOCK | |
85 | select ARCH_INLINE_SPIN_TRYLOCK_BH | |
86 | select ARCH_INLINE_SPIN_UNLOCK | |
87 | select ARCH_INLINE_SPIN_UNLOCK_BH | |
88 | select ARCH_INLINE_SPIN_UNLOCK_IRQ | |
89 | select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE | |
6beb0009 TG |
90 | select ARCH_INLINE_WRITE_LOCK |
91 | select ARCH_INLINE_WRITE_LOCK_BH | |
92 | select ARCH_INLINE_WRITE_LOCK_IRQ | |
93 | select ARCH_INLINE_WRITE_LOCK_IRQSAVE | |
0e0d04a8 | 94 | select ARCH_INLINE_WRITE_TRYLOCK |
6beb0009 TG |
95 | select ARCH_INLINE_WRITE_UNLOCK |
96 | select ARCH_INLINE_WRITE_UNLOCK_BH | |
97 | select ARCH_INLINE_WRITE_UNLOCK_IRQ | |
98 | select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE | |
0e0d04a8 | 99 | select ARCH_SAVE_PAGE_KEYS if HIBERNATION |
36e7fdaa | 100 | select ARCH_SUPPORTS_ATOMIC_RMW |
efc1d23b | 101 | select ARCH_USE_CMPXCHG_LOCKREF |
c1d7e01d | 102 | select ARCH_WANT_IPC_PARSE_VERSION |
0e0d04a8 HC |
103 | select BUILDTIME_EXTABLE_SORT |
104 | select CLONE_BACKWARDS2 | |
5d6a0163 | 105 | select DYNAMIC_FTRACE if FUNCTION_TRACER |
0e0d04a8 HC |
106 | select GENERIC_CLOCKEVENTS |
107 | select GENERIC_CPU_DEVICES if !SMP | |
746479cd | 108 | select GENERIC_FIND_FIRST_BIT |
e80e7813 | 109 | select GENERIC_SMP_IDLE_THREAD |
79c74ecb | 110 | select GENERIC_TIME_VSYSCALL |
0e0d04a8 | 111 | select HAVE_ALIGNED_STRUCT_PAGE if SLUB |
7a017721 | 112 | select HAVE_ARCH_AUDITSYSCALL |
0e0d04a8 | 113 | select HAVE_ARCH_JUMP_LABEL if !MARCH_G5 |
c63cb468 | 114 | select HAVE_ARCH_SECCOMP_FILTER |
0e0d04a8 HC |
115 | select HAVE_ARCH_TRACEHOOK |
116 | select HAVE_ARCH_TRANSPARENT_HUGEPAGE if 64BIT | |
117 | select HAVE_BPF_JIT if 64BIT && PACK_STACK | |
118 | select HAVE_CMPXCHG_DOUBLE | |
119 | select HAVE_CMPXCHG_LOCAL | |
120 | select HAVE_C_RECORDMCOUNT | |
121 | select HAVE_DEBUG_KMEMLEAK | |
53255c9a | 122 | select HAVE_DYNAMIC_FTRACE if 64BIT |
10dec7db | 123 | select HAVE_DYNAMIC_FTRACE_WITH_REGS if 64BIT |
0e0d04a8 | 124 | select HAVE_FTRACE_MCOUNT_RECORD |
53255c9a HC |
125 | select HAVE_FUNCTION_GRAPH_TRACER if 64BIT |
126 | select HAVE_FUNCTION_TRACER if 64BIT | |
03b8c7b6 | 127 | select HAVE_FUTEX_CMPXCHG if FUTEX |
0e0d04a8 HC |
128 | select HAVE_KERNEL_BZIP2 |
129 | select HAVE_KERNEL_GZIP | |
8e2872ce | 130 | select HAVE_KERNEL_LZ4 |
0e0d04a8 HC |
131 | select HAVE_KERNEL_LZMA |
132 | select HAVE_KERNEL_LZO | |
133 | select HAVE_KERNEL_XZ | |
134 | select HAVE_KPROBES | |
135 | select HAVE_KRETPROBES | |
136 | select HAVE_KVM if 64BIT | |
137 | select HAVE_MEMBLOCK | |
138 | select HAVE_MEMBLOCK_NODE_MAP | |
50be6345 | 139 | select HAVE_MEMBLOCK_PHYS_MAP |
786d35d4 | 140 | select HAVE_MOD_ARCH_SPECIFIC |
0e0d04a8 HC |
141 | select HAVE_OPROFILE |
142 | select HAVE_PERF_EVENTS | |
143 | select HAVE_REGS_AND_STACK_ACCESS_API | |
144 | select HAVE_SYSCALL_TRACEPOINTS | |
0e0d04a8 HC |
145 | select HAVE_UID16 if 32BIT |
146 | select HAVE_VIRT_CPU_ACCOUNTING | |
786d35d4 | 147 | select MODULES_USE_ELF_RELA |
50be6345 | 148 | select NO_BOOTMEM |
7eddd99c | 149 | select OLD_SIGACTION |
93bead43 | 150 | select OLD_SIGSUSPEND3 |
0e0d04a8 | 151 | select SYSCTL_EXCEPTION_TRACE |
0563416b | 152 | select TTY |
0e0d04a8 | 153 | select VIRT_CPU_ACCOUNTING |
93bead43 | 154 | select VIRT_TO_BUS |
1da177e4 | 155 | |
fca3e357 | 156 | config SCHED_OMIT_FRAME_POINTER |
6f9a3c33 | 157 | def_bool y |
fca3e357 | 158 | |
1da177e4 LT |
159 | source "init/Kconfig" |
160 | ||
dc52ddc0 MH |
161 | source "kernel/Kconfig.freezer" |
162 | ||
843c48fd JG |
163 | menu "Processor type and features" |
164 | ||
165 | config HAVE_MARCH_Z900_FEATURES | |
166 | def_bool n | |
167 | ||
168 | config HAVE_MARCH_Z990_FEATURES | |
169 | def_bool n | |
170 | select HAVE_MARCH_Z900_FEATURES | |
171 | ||
172 | config HAVE_MARCH_Z9_109_FEATURES | |
173 | def_bool n | |
174 | select HAVE_MARCH_Z990_FEATURES | |
175 | ||
176 | config HAVE_MARCH_Z10_FEATURES | |
177 | def_bool n | |
178 | select HAVE_MARCH_Z9_109_FEATURES | |
179 | ||
180 | config HAVE_MARCH_Z196_FEATURES | |
181 | def_bool n | |
182 | select HAVE_MARCH_Z10_FEATURES | |
183 | ||
991c1505 HC |
184 | config HAVE_MARCH_ZEC12_FEATURES |
185 | def_bool n | |
186 | select HAVE_MARCH_Z196_FEATURES | |
187 | ||
f8b2dcbd MS |
188 | config HAVE_MARCH_Z13_FEATURES |
189 | def_bool n | |
190 | select HAVE_MARCH_ZEC12_FEATURES | |
191 | ||
843c48fd JG |
192 | choice |
193 | prompt "Processor type" | |
194 | default MARCH_G5 | |
195 | ||
196 | config MARCH_G5 | |
197 | bool "System/390 model G5 and G6" | |
198 | depends on !64BIT | |
199 | help | |
200 | Select this to build a 31 bit kernel that works | |
201 | on all ESA/390 and z/Architecture machines. | |
1da177e4 | 202 | |
843c48fd JG |
203 | config MARCH_Z900 |
204 | bool "IBM zSeries model z800 and z900" | |
205 | select HAVE_MARCH_Z900_FEATURES if 64BIT | |
206 | help | |
207 | Select this to enable optimizations for model z800/z900 (2064 and | |
208 | 2066 series). This will enable some optimizations that are not | |
209 | available on older ESA/390 (31 Bit) only CPUs. | |
210 | ||
211 | config MARCH_Z990 | |
212 | bool "IBM zSeries model z890 and z990" | |
213 | select HAVE_MARCH_Z990_FEATURES if 64BIT | |
214 | help | |
215 | Select this to enable optimizations for model z890/z990 (2084 and | |
216 | 2086 series). The kernel will be slightly faster but will not work | |
217 | on older machines. | |
218 | ||
219 | config MARCH_Z9_109 | |
220 | bool "IBM System z9" | |
221 | select HAVE_MARCH_Z9_109_FEATURES if 64BIT | |
222 | help | |
223 | Select this to enable optimizations for IBM System z9 (2094 and | |
224 | 2096 series). The kernel will be slightly faster but will not work | |
225 | on older machines. | |
226 | ||
227 | config MARCH_Z10 | |
228 | bool "IBM System z10" | |
229 | select HAVE_MARCH_Z10_FEATURES if 64BIT | |
230 | help | |
231 | Select this to enable optimizations for IBM System z10 (2097 and | |
232 | 2098 series). The kernel will be slightly faster but will not work | |
233 | on older machines. | |
234 | ||
235 | config MARCH_Z196 | |
236 | bool "IBM zEnterprise 114 and 196" | |
237 | select HAVE_MARCH_Z196_FEATURES if 64BIT | |
238 | help | |
239 | Select this to enable optimizations for IBM zEnterprise 114 and 196 | |
240 | (2818 and 2817 series). The kernel will be slightly faster but will | |
241 | not work on older machines. | |
1da177e4 | 242 | |
991c1505 | 243 | config MARCH_ZEC12 |
59471227 | 244 | bool "IBM zBC12 and zEC12" |
991c1505 HC |
245 | select HAVE_MARCH_ZEC12_FEATURES if 64BIT |
246 | help | |
59471227 HC |
247 | Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and |
248 | 2827 series). The kernel will be slightly faster but will not work on | |
249 | older machines. | |
991c1505 | 250 | |
f8b2dcbd MS |
251 | config MARCH_Z13 |
252 | bool "IBM z13" | |
253 | select HAVE_MARCH_Z13_FEATURES if 64BIT | |
254 | help | |
255 | Select this to enable optimizations for IBM z13 (2964 series). | |
256 | The kernel will be slightly faster but will not work on older | |
257 | machines. | |
258 | ||
843c48fd | 259 | endchoice |
1da177e4 | 260 | |
1db9e051 HC |
261 | config MARCH_G5_TUNE |
262 | def_bool TUNE_G5 || MARCH_G5 && TUNE_DEFAULT | |
263 | ||
264 | config MARCH_Z900_TUNE | |
265 | def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT | |
266 | ||
267 | config MARCH_Z990_TUNE | |
268 | def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT | |
269 | ||
270 | config MARCH_Z9_109_TUNE | |
271 | def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT | |
272 | ||
273 | config MARCH_Z10_TUNE | |
274 | def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT | |
275 | ||
276 | config MARCH_Z196_TUNE | |
277 | def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT | |
278 | ||
279 | config MARCH_ZEC12_TUNE | |
280 | def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT | |
281 | ||
f8b2dcbd MS |
282 | config MARCH_Z13_TUNE |
283 | def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT | |
284 | ||
1db9e051 HC |
285 | choice |
286 | prompt "Tune code generation" | |
287 | default TUNE_DEFAULT | |
288 | help | |
289 | Cause the compiler to tune (-mtune) the generated code for a machine. | |
290 | This will make the code run faster on the selected machine but | |
291 | somewhat slower on other machines. | |
292 | This option only changes how the compiler emits instructions, not the | |
293 | selection of instructions itself, so the resulting kernel will run on | |
294 | all other machines. | |
295 | ||
296 | config TUNE_DEFAULT | |
297 | bool "Default" | |
298 | help | |
299 | Tune the generated code for the target processor for which the kernel | |
300 | will be compiled. | |
301 | ||
302 | config TUNE_G5 | |
303 | bool "System/390 model G5 and G6" | |
304 | ||
305 | config TUNE_Z900 | |
306 | bool "IBM zSeries model z800 and z900" | |
307 | ||
308 | config TUNE_Z990 | |
309 | bool "IBM zSeries model z890 and z990" | |
310 | ||
311 | config TUNE_Z9_109 | |
312 | bool "IBM System z9" | |
313 | ||
314 | config TUNE_Z10 | |
315 | bool "IBM System z10" | |
316 | ||
317 | config TUNE_Z196 | |
318 | bool "IBM zEnterprise 114 and 196" | |
319 | ||
320 | config TUNE_ZEC12 | |
321 | bool "IBM zBC12 and zEC12" | |
322 | ||
f8b2dcbd MS |
323 | config TUNE_Z13 |
324 | bool "IBM z13" | |
325 | ||
1db9e051 HC |
326 | endchoice |
327 | ||
347a8dc3 | 328 | config 64BIT |
6f9a3c33 MS |
329 | def_bool y |
330 | prompt "64 bit kernel" | |
1da177e4 | 331 | help |
db81a23d | 332 | Select this option if you have an IBM z/Architecture machine |
1da177e4 LT |
333 | and want to use the 64 bit addressing mode. |
334 | ||
d9f7a745 | 335 | config 32BIT |
6f9a3c33 | 336 | def_bool y if !64BIT |
d9f7a745 | 337 | |
843c48fd JG |
338 | config COMPAT |
339 | def_bool y | |
340 | prompt "Kernel support for 31 bit emulation" | |
341 | depends on 64BIT | |
342 | select COMPAT_BINFMT_ELF if BINFMT_ELF | |
343 | select ARCH_WANT_OLD_COMPAT_IPC | |
7eddd99c | 344 | select COMPAT_OLD_SIGACTION |
843c48fd JG |
345 | help |
346 | Select this option if you want to enable your system kernel to | |
347 | handle system-calls from ELF binaries for 31 bit ESA. This option | |
348 | (and some other stuff like libraries and such) is needed for | |
349 | executing 31 bit applications. It is safe to say "Y". | |
350 | ||
351 | config SYSVIPC_COMPAT | |
352 | def_bool y if COMPAT && SYSVIPC | |
353 | ||
354 | config KEYS_COMPAT | |
355 | def_bool y if COMPAT && KEYS | |
356 | ||
1da177e4 | 357 | config SMP |
6f9a3c33 MS |
358 | def_bool y |
359 | prompt "Symmetric multi-processing support" | |
1da177e4 LT |
360 | ---help--- |
361 | This enables support for systems with more than one CPU. If you have | |
362 | a system with only one CPU, like most personal computers, say N. If | |
363 | you have a system with more than one CPU, say Y. | |
364 | ||
4a474157 | 365 | If you say N here, the kernel will run on uni- and multiprocessor |
1da177e4 LT |
366 | machines, but will use only one CPU of a multiprocessor machine. If |
367 | you say Y here, the kernel will run on many, but not all, | |
4a474157 | 368 | uniprocessor machines. On a uniprocessor machine, the kernel |
1da177e4 LT |
369 | will run faster if you say N here. |
370 | ||
03502faa AB |
371 | See also the SMP-HOWTO available at |
372 | <http://www.tldp.org/docs.html#howto>. | |
1da177e4 LT |
373 | |
374 | Even if you don't know what to do here, say Y. | |
375 | ||
376 | config NR_CPUS | |
8cb04be8 XVP |
377 | int "Maximum number of CPUs (2-256)" |
378 | range 2 256 | |
1da177e4 | 379 | depends on SMP |
057c5cb3 HC |
380 | default "32" if !64BIT |
381 | default "64" if 64BIT | |
1da177e4 LT |
382 | help |
383 | This allows you to specify the maximum number of CPUs which this | |
8cb04be8 | 384 | kernel will support. The maximum supported value is 256 and the |
1da177e4 LT |
385 | minimum value which makes sense is 2. |
386 | ||
387 | This is purely to save memory - each supported CPU adds | |
388 | approximately sixteen kilobytes to the kernel image. | |
389 | ||
390 | config HOTPLUG_CPU | |
6f9a3c33 MS |
391 | def_bool y |
392 | prompt "Support for hot-pluggable CPUs" | |
1da177e4 | 393 | depends on SMP |
1da177e4 LT |
394 | help |
395 | Say Y here to be able to turn CPUs off and on. CPUs | |
396 | can be controlled through /sys/devices/system/cpu/cpu#. | |
397 | Say N if you want to disable CPU hotplug. | |
398 | ||
8d11e021 | 399 | config SCHED_MC |
83a24e32 | 400 | def_bool n |
8d11e021 | 401 | |
4cb14bc8 | 402 | config SCHED_BOOK |
6f9a3c33 MS |
403 | def_bool y |
404 | prompt "Book scheduler support" | |
83a24e32 HC |
405 | depends on SMP |
406 | select SCHED_MC | |
4cb14bc8 HC |
407 | help |
408 | Book scheduler support improves the CPU scheduler's decision making | |
409 | when dealing with machines that have several books. | |
410 | ||
843c48fd JG |
411 | source kernel/Kconfig.preempt |
412 | ||
1da177e4 | 413 | config MATHEMU |
6f9a3c33 MS |
414 | def_bool y |
415 | prompt "IEEE FPU emulation" | |
1da177e4 LT |
416 | depends on MARCH_G5 |
417 | help | |
418 | This option is required for IEEE compliant floating point arithmetic | |
db81a23d | 419 | on older ESA/390 machines. Say Y unless you know your machine doesn't |
1da177e4 LT |
420 | need this. |
421 | ||
843c48fd | 422 | source kernel/Kconfig.hz |
1da177e4 | 423 | |
843c48fd | 424 | endmenu |
1da177e4 | 425 | |
843c48fd | 426 | menu "Memory setup" |
1d057720 | 427 | |
843c48fd | 428 | config ARCH_SPARSEMEM_ENABLE |
6f9a3c33 | 429 | def_bool y |
843c48fd JG |
430 | select SPARSEMEM_VMEMMAP_ENABLE |
431 | select SPARSEMEM_VMEMMAP | |
432 | select SPARSEMEM_STATIC if !64BIT | |
e65e1fc2 | 433 | |
843c48fd JG |
434 | config ARCH_SPARSEMEM_DEFAULT |
435 | def_bool y | |
1da177e4 | 436 | |
843c48fd JG |
437 | config ARCH_SELECT_MEMORY_MODEL |
438 | def_bool y | |
1da177e4 | 439 | |
843c48fd JG |
440 | config ARCH_ENABLE_MEMORY_HOTPLUG |
441 | def_bool y if SPARSEMEM | |
0efa4703 | 442 | |
843c48fd JG |
443 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
444 | def_bool y | |
e37f50e1 | 445 | |
ec66ad66 MS |
446 | config ARCH_ENABLE_SPLIT_PMD_PTLOCK |
447 | def_bool y | |
448 | depends on 64BIT | |
449 | ||
843c48fd JG |
450 | config FORCE_MAX_ZONEORDER |
451 | int | |
452 | default "9" | |
f861e405 | 453 | |
843c48fd | 454 | source "mm/Kconfig" |
1da177e4 LT |
455 | |
456 | config PACK_STACK | |
6f9a3c33 MS |
457 | def_bool y |
458 | prompt "Pack kernel stack" | |
1da177e4 LT |
459 | help |
460 | This option enables the compiler option -mkernel-backchain if it | |
461 | is available. If the option is available the compiler supports | |
462 | the new stack layout which dramatically reduces the minimum stack | |
463 | frame size. With an old compiler a non-leaf function needs a | |
464 | minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With | |
465 | -mkernel-backchain the minimum size drops to 16 byte on 31 bit | |
466 | and 24 byte on 64 bit. | |
467 | ||
468 | Say Y if you are unsure. | |
469 | ||
1da177e4 | 470 | config CHECK_STACK |
6f9a3c33 MS |
471 | def_bool y |
472 | prompt "Detect kernel stack overflow" | |
1da177e4 LT |
473 | help |
474 | This option enables the compiler option -mstack-guard and | |
475 | -mstack-size if they are available. If the compiler supports them | |
476 | it will emit additional code to each function prolog to trigger | |
477 | an illegal operation if the kernel stack is about to overflow. | |
478 | ||
479 | Say N if you are unsure. | |
480 | ||
481 | config STACK_GUARD | |
482 | int "Size of the guard area (128-1024)" | |
483 | range 128 1024 | |
484 | depends on CHECK_STACK | |
485 | default "256" | |
486 | help | |
487 | This allows you to specify the size of the guard area at the lower | |
488 | end of the kernel stack. If the kernel stack points into the guard | |
489 | area on function entry an illegal operation is triggered. The size | |
490 | needs to be a power of 2. Please keep in mind that the size of an | |
491 | interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit. | |
492 | The minimum size for the stack guard should be 256 for 31 bit and | |
493 | 512 for 64 bit. | |
494 | ||
2c190da4 | 495 | config WARN_DYNAMIC_STACK |
6f9a3c33 | 496 | def_bool n |
2c190da4 | 497 | prompt "Emit compiler warnings for function with dynamic stack usage" |
1da177e4 | 498 | help |
2c190da4 JG |
499 | This option enables the compiler option -mwarn-dynamicstack. If the |
500 | compiler supports this options generates warnings for functions | |
501 | that dynamically allocate stack space using alloca. | |
1da177e4 LT |
502 | |
503 | Say N if you are unsure. | |
504 | ||
843c48fd | 505 | endmenu |
3f22ab27 | 506 | |
843c48fd | 507 | menu "I/O subsystem" |
1da177e4 | 508 | |
1da177e4 | 509 | config QDIO |
6f9a3c33 MS |
510 | def_tristate y |
511 | prompt "QDIO support" | |
1da177e4 | 512 | ---help--- |
8129ee16 | 513 | This driver provides the Queued Direct I/O base support for |
efca13bc | 514 | IBM System z. |
1da177e4 LT |
515 | |
516 | To compile this driver as a module, choose M here: the | |
517 | module will be called qdio. | |
518 | ||
519 | If unsure, say Y. | |
520 | ||
c8717a3d JG |
521 | menuconfig PCI |
522 | bool "PCI support" | |
c8717a3d | 523 | depends on 64BIT |
90114d65 | 524 | select HAVE_DMA_ATTRS |
c8717a3d JG |
525 | select PCI_MSI |
526 | help | |
527 | Enable PCI support. | |
528 | ||
529 | if PCI | |
530 | ||
531 | config PCI_NR_FUNCTIONS | |
532 | int "Maximum number of PCI functions (1-4096)" | |
533 | range 1 4096 | |
534 | default "64" | |
535 | help | |
536 | This allows you to specify the maximum number of PCI functions which | |
537 | this kernel will support. | |
538 | ||
1f44a225 MS |
539 | config PCI_NR_MSI |
540 | int "Maximum number of MSI interrupts (64-32768)" | |
541 | range 64 32768 | |
542 | default "256" | |
543 | help | |
544 | This defines the number of virtual interrupts the kernel will | |
545 | provide for MSI interrupts. If you configure your system to have | |
546 | too few drivers will fail to allocate MSI interrupts for all | |
547 | PCI devices. | |
548 | ||
c8717a3d JG |
549 | source "drivers/pci/Kconfig" |
550 | source "drivers/pci/pcie/Kconfig" | |
551 | source "drivers/pci/hotplug/Kconfig" | |
552 | ||
553 | endif # PCI | |
554 | ||
555 | config PCI_DOMAINS | |
556 | def_bool PCI | |
557 | ||
558 | config HAS_IOMEM | |
559 | def_bool PCI | |
560 | ||
561 | config IOMMU_HELPER | |
562 | def_bool PCI | |
563 | ||
564 | config HAS_DMA | |
565 | def_bool PCI | |
566 | select HAVE_DMA_API_DEBUG | |
567 | ||
568 | config NEED_SG_DMA_LENGTH | |
569 | def_bool PCI | |
570 | ||
91630032 JG |
571 | config NEED_DMA_MAP_STATE |
572 | def_bool PCI | |
573 | ||
9d92a7e1 | 574 | config CHSC_SCH |
d9c11b1e | 575 | def_tristate m |
6f9a3c33 | 576 | prompt "Support for CHSC subchannels" |
9d92a7e1 CH |
577 | help |
578 | This driver allows usage of CHSC subchannels. A CHSC subchannel | |
579 | is usually present on LPAR only. | |
580 | The driver creates a device /dev/chsc, which may be used to | |
581 | obtain I/O configuration information about the machine and | |
582 | to issue asynchronous chsc commands (DANGEROUS). | |
583 | You will usually only want to use this interface on a special | |
584 | LPAR designated for system management. | |
585 | ||
586 | To compile this driver as a module, choose M here: the | |
587 | module will be called chsc_sch. | |
588 | ||
589 | If unsure, say N. | |
590 | ||
1d1c8f78 SO |
591 | config SCM_BUS |
592 | def_bool y | |
593 | depends on 64BIT | |
594 | prompt "SCM bus driver" | |
595 | help | |
596 | Bus driver for Storage Class Memory. | |
597 | ||
eadb86ab SO |
598 | config EADM_SCH |
599 | def_tristate m | |
600 | prompt "Support for EADM subchannels" | |
601 | depends on SCM_BUS | |
602 | help | |
603 | This driver allows usage of EADM subchannels. EADM subchannels act | |
604 | as a communication vehicle for SCM increments. | |
605 | ||
606 | To compile this driver as a module, choose M here: the | |
607 | module will be called eadm_sch. | |
608 | ||
843c48fd JG |
609 | endmenu |
610 | ||
611 | menu "Dump support" | |
612 | ||
613 | config CRASH_DUMP | |
614 | bool "kernel crash dumps" | |
615 | depends on 64BIT && SMP | |
616 | select KEXEC | |
617 | help | |
618 | Generate crash dump after being started by kexec. | |
619 | Crash dump kernels are loaded in the main kernel with kexec-tools | |
620 | into a specially reserved region and then later executed after | |
621 | a crash by kdump/kexec. | |
843c48fd | 622 | Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this. |
bf28a597 MH |
623 | This option also enables s390 zfcpdump. |
624 | See also <file:Documentation/s390/zfcpdump.txt> | |
843c48fd JG |
625 | |
626 | endmenu | |
627 | ||
628 | menu "Executable file formats / Emulations" | |
1da177e4 | 629 | |
1da177e4 LT |
630 | source "fs/Kconfig.binfmt" |
631 | ||
843c48fd JG |
632 | config SECCOMP |
633 | def_bool y | |
634 | prompt "Enable seccomp to safely compute untrusted bytecode" | |
635 | depends on PROC_FS | |
636 | help | |
637 | This kernel feature is useful for number crunching applications | |
638 | that may need to compute untrusted bytecode during their | |
639 | execution. By using pipes or other transports made available to | |
640 | the process as file descriptors supporting the read/write | |
641 | syscalls, it's possible to isolate those applications in | |
642 | their own address space using seccomp. Once seccomp is | |
643 | enabled via /proc/<pid>/seccomp, it cannot be disabled | |
644 | and the task is only allowed to execute a few safe syscalls | |
645 | defined by each seccomp mode. | |
646 | ||
647 | If unsure, say Y. | |
648 | ||
649 | endmenu | |
650 | ||
651 | menu "Power Management" | |
652 | ||
653 | config ARCH_HIBERNATION_POSSIBLE | |
654 | def_bool y if 64BIT | |
655 | ||
656 | source "kernel/power/Kconfig" | |
657 | ||
658 | endmenu | |
659 | ||
660 | source "net/Kconfig" | |
661 | ||
662 | config PCMCIA | |
663 | def_bool n | |
664 | ||
665 | config CCW | |
666 | def_bool y | |
667 | ||
668 | source "drivers/Kconfig" | |
669 | ||
670 | source "fs/Kconfig" | |
671 | ||
672 | source "arch/s390/Kconfig.debug" | |
673 | ||
674 | source "security/Kconfig" | |
675 | ||
676 | source "crypto/Kconfig" | |
677 | ||
678 | source "lib/Kconfig" | |
679 | ||
680 | menu "Virtualization" | |
684de39b | 681 | |
1da177e4 | 682 | config PFAULT |
6f9a3c33 MS |
683 | def_bool y |
684 | prompt "Pseudo page fault support" | |
1da177e4 LT |
685 | help |
686 | Select this option, if you want to use PFAULT pseudo page fault | |
687 | handling under VM. If running native or in LPAR, this option | |
688 | has no effect. If your VM does not support PFAULT, PAGEEX | |
689 | pseudo page fault handling will be used. | |
690 | Note that VM 4.2 supports PFAULT but has a bug in its | |
691 | implementation that causes some problems. | |
692 | Everybody who wants to run Linux under VM != VM4.2 should select | |
693 | this option. | |
694 | ||
695 | config SHARED_KERNEL | |
0eccc783 HC |
696 | bool "VM shared kernel support" |
697 | depends on !JUMP_LABEL | |
1da177e4 LT |
698 | help |
699 | Select this option, if you want to share the text segment of the | |
700 | Linux kernel between different VM guests. This reduces memory | |
701 | usage with lots of guests but greatly increases kernel size. | |
9c9c1761 HC |
702 | Also if a kernel was IPL'ed from a shared segment the kexec system |
703 | call will not work. | |
1da177e4 LT |
704 | You should only select this option if you know what you are |
705 | doing and want to exploit this feature. | |
706 | ||
707 | config CMM | |
6f9a3c33 MS |
708 | def_tristate n |
709 | prompt "Cooperative memory management" | |
1da177e4 LT |
710 | help |
711 | Select this option, if you want to enable the kernel interface | |
712 | to reduce the memory size of the system. This is accomplished | |
713 | by allocating pages of memory and put them "on hold". This only | |
714 | makes sense for a system running under VM where the unused pages | |
715 | will be reused by VM for other guest systems. The interface | |
716 | allows an external monitor to balance memory of many systems. | |
717 | Everybody who wants to run Linux under VM should select this | |
718 | option. | |
719 | ||
1da177e4 | 720 | config CMM_IUCV |
6f9a3c33 MS |
721 | def_bool y |
722 | prompt "IUCV special message interface to cooperative memory management" | |
1da177e4 LT |
723 | depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV) |
724 | help | |
725 | Select this option to enable the special message interface to | |
726 | the cooperative memory management. | |
727 | ||
1da177e4 | 728 | config APPLDATA_BASE |
6f9a3c33 MS |
729 | def_bool n |
730 | prompt "Linux - VM Monitor Stream, base infrastructure" | |
c185b783 | 731 | depends on PROC_FS |
1da177e4 LT |
732 | help |
733 | This provides a kernel interface for creating and updating z/VM APPLDATA | |
734 | monitor records. The monitor records are updated at certain time | |
735 | intervals, once the timer is started. | |
736 | Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer, | |
737 | i.e. enables or disables monitoring on the Linux side. | |
738 | A custom interval value (in seconds) can be written to | |
739 | /proc/appldata/interval. | |
740 | ||
741 | Defaults are 60 seconds interval and timer off. | |
742 | The /proc entries can also be read from, showing the current settings. | |
743 | ||
744 | config APPLDATA_MEM | |
6f9a3c33 MS |
745 | def_tristate m |
746 | prompt "Monitor memory management statistics" | |
62fb2ba3 | 747 | depends on APPLDATA_BASE && VM_EVENT_COUNTERS |
1da177e4 LT |
748 | help |
749 | This provides memory management related data to the Linux - VM Monitor | |
750 | Stream, like paging/swapping rate, memory utilisation, etc. | |
751 | Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM | |
752 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
753 | on the z/VM side. | |
754 | ||
755 | Default is disabled. | |
756 | The /proc entry can also be read from, showing the current settings. | |
757 | ||
758 | This can also be compiled as a module, which will be called | |
759 | appldata_mem.o. | |
760 | ||
761 | config APPLDATA_OS | |
6f9a3c33 MS |
762 | def_tristate m |
763 | prompt "Monitor OS statistics" | |
1da177e4 LT |
764 | depends on APPLDATA_BASE |
765 | help | |
766 | This provides OS related data to the Linux - VM Monitor Stream, like | |
767 | CPU utilisation, etc. | |
768 | Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM | |
769 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
770 | on the z/VM side. | |
771 | ||
772 | Default is disabled. | |
773 | This can also be compiled as a module, which will be called | |
774 | appldata_os.o. | |
775 | ||
776 | config APPLDATA_NET_SUM | |
6f9a3c33 MS |
777 | def_tristate m |
778 | prompt "Monitor overall network statistics" | |
70193af9 | 779 | depends on APPLDATA_BASE && NET |
1da177e4 LT |
780 | help |
781 | This provides network related data to the Linux - VM Monitor Stream, | |
782 | currently there is only a total sum of network I/O statistics, no | |
783 | per-interface data. | |
784 | Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM | |
785 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
786 | on the z/VM side. | |
787 | ||
788 | Default is disabled. | |
789 | This can also be compiled as a module, which will be called | |
790 | appldata_net_sum.o. | |
791 | ||
24bbb1fa | 792 | config S390_HYPFS_FS |
6f9a3c33 MS |
793 | def_bool y |
794 | prompt "s390 hypervisor file system support" | |
24bbb1fa | 795 | select SYS_HYPERVISOR |
24bbb1fa MH |
796 | help |
797 | This is a virtual file system intended to provide accounting | |
798 | information in an s390 hypervisor environment. | |
799 | ||
843c48fd | 800 | source "arch/s390/kvm/Kconfig" |
411ed322 | 801 | |
fa587743 | 802 | config S390_GUEST |
6f9a3c33 | 803 | def_bool y |
510cf5a6 KC |
804 | prompt "s390 support for virtio devices" |
805 | depends on 64BIT | |
79b6f7fb | 806 | select TTY |
80629b0b | 807 | select VIRTUALIZATION |
fa587743 | 808 | select VIRTIO |
faeba830 | 809 | select VIRTIO_CONSOLE |
fa587743 | 810 | help |
bdd1fc27 CH |
811 | Enabling this option adds support for virtio based paravirtual device |
812 | drivers on s390. | |
1da177e4 | 813 | |
20766c08 | 814 | Select this option if you want to run the kernel as a guest under |
bdd1fc27 | 815 | the KVM hypervisor. |
155af2f9 HJP |
816 | |
817 | endmenu |