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 | ||
347a8dc3 | 61 | config S390 |
61d48c2c | 62 | def_bool y |
0e0d04a8 | 63 | select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE |
93bead43 | 64 | select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS |
0e0d04a8 | 65 | select ARCH_HAVE_NMI_SAFE_CMPXCHG |
6beb0009 TG |
66 | select ARCH_INLINE_READ_LOCK |
67 | select ARCH_INLINE_READ_LOCK_BH | |
68 | select ARCH_INLINE_READ_LOCK_IRQ | |
69 | select ARCH_INLINE_READ_LOCK_IRQSAVE | |
0e0d04a8 | 70 | select ARCH_INLINE_READ_TRYLOCK |
6beb0009 TG |
71 | select ARCH_INLINE_READ_UNLOCK |
72 | select ARCH_INLINE_READ_UNLOCK_BH | |
73 | select ARCH_INLINE_READ_UNLOCK_IRQ | |
74 | select ARCH_INLINE_READ_UNLOCK_IRQRESTORE | |
0e0d04a8 HC |
75 | select ARCH_INLINE_SPIN_LOCK |
76 | select ARCH_INLINE_SPIN_LOCK_BH | |
77 | select ARCH_INLINE_SPIN_LOCK_IRQ | |
78 | select ARCH_INLINE_SPIN_LOCK_IRQSAVE | |
79 | select ARCH_INLINE_SPIN_TRYLOCK | |
80 | select ARCH_INLINE_SPIN_TRYLOCK_BH | |
81 | select ARCH_INLINE_SPIN_UNLOCK | |
82 | select ARCH_INLINE_SPIN_UNLOCK_BH | |
83 | select ARCH_INLINE_SPIN_UNLOCK_IRQ | |
84 | select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE | |
6beb0009 TG |
85 | select ARCH_INLINE_WRITE_LOCK |
86 | select ARCH_INLINE_WRITE_LOCK_BH | |
87 | select ARCH_INLINE_WRITE_LOCK_IRQ | |
88 | select ARCH_INLINE_WRITE_LOCK_IRQSAVE | |
0e0d04a8 | 89 | select ARCH_INLINE_WRITE_TRYLOCK |
6beb0009 TG |
90 | select ARCH_INLINE_WRITE_UNLOCK |
91 | select ARCH_INLINE_WRITE_UNLOCK_BH | |
92 | select ARCH_INLINE_WRITE_UNLOCK_IRQ | |
93 | select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE | |
0e0d04a8 | 94 | select ARCH_SAVE_PAGE_KEYS if HIBERNATION |
36e7fdaa | 95 | select ARCH_SUPPORTS_ATOMIC_RMW |
efc1d23b | 96 | select ARCH_USE_CMPXCHG_LOCKREF |
c1d7e01d | 97 | select ARCH_WANT_IPC_PARSE_VERSION |
0e0d04a8 HC |
98 | select BUILDTIME_EXTABLE_SORT |
99 | select CLONE_BACKWARDS2 | |
5d6a0163 | 100 | select DYNAMIC_FTRACE if FUNCTION_TRACER |
0e0d04a8 HC |
101 | select GENERIC_CLOCKEVENTS |
102 | select GENERIC_CPU_DEVICES if !SMP | |
746479cd | 103 | select GENERIC_FIND_FIRST_BIT |
e80e7813 | 104 | select GENERIC_SMP_IDLE_THREAD |
79c74ecb | 105 | select GENERIC_TIME_VSYSCALL |
0e0d04a8 | 106 | select HAVE_ALIGNED_STRUCT_PAGE if SLUB |
7a017721 | 107 | select HAVE_ARCH_AUDITSYSCALL |
0e0d04a8 | 108 | select HAVE_ARCH_JUMP_LABEL if !MARCH_G5 |
c63cb468 | 109 | select HAVE_ARCH_SECCOMP_FILTER |
0e0d04a8 HC |
110 | select HAVE_ARCH_TRACEHOOK |
111 | select HAVE_ARCH_TRANSPARENT_HUGEPAGE if 64BIT | |
112 | select HAVE_BPF_JIT if 64BIT && PACK_STACK | |
113 | select HAVE_CMPXCHG_DOUBLE | |
114 | select HAVE_CMPXCHG_LOCAL | |
115 | select HAVE_C_RECORDMCOUNT | |
116 | select HAVE_DEBUG_KMEMLEAK | |
117 | select HAVE_DYNAMIC_FTRACE | |
10dec7db | 118 | select HAVE_DYNAMIC_FTRACE_WITH_REGS if 64BIT |
0e0d04a8 HC |
119 | select HAVE_FTRACE_MCOUNT_RECORD |
120 | select HAVE_FUNCTION_GRAPH_TRACER | |
121 | select HAVE_FUNCTION_TRACER | |
03b8c7b6 | 122 | select HAVE_FUTEX_CMPXCHG if FUTEX |
0e0d04a8 HC |
123 | select HAVE_KERNEL_BZIP2 |
124 | select HAVE_KERNEL_GZIP | |
8e2872ce | 125 | select HAVE_KERNEL_LZ4 |
0e0d04a8 HC |
126 | select HAVE_KERNEL_LZMA |
127 | select HAVE_KERNEL_LZO | |
128 | select HAVE_KERNEL_XZ | |
129 | select HAVE_KPROBES | |
130 | select HAVE_KRETPROBES | |
131 | select HAVE_KVM if 64BIT | |
132 | select HAVE_MEMBLOCK | |
133 | select HAVE_MEMBLOCK_NODE_MAP | |
50be6345 | 134 | select HAVE_MEMBLOCK_PHYS_MAP |
786d35d4 | 135 | select HAVE_MOD_ARCH_SPECIFIC |
0e0d04a8 HC |
136 | select HAVE_OPROFILE |
137 | select HAVE_PERF_EVENTS | |
138 | select HAVE_REGS_AND_STACK_ACCESS_API | |
139 | select HAVE_SYSCALL_TRACEPOINTS | |
0e0d04a8 HC |
140 | select HAVE_UID16 if 32BIT |
141 | select HAVE_VIRT_CPU_ACCOUNTING | |
786d35d4 | 142 | select MODULES_USE_ELF_RELA |
50be6345 | 143 | select NO_BOOTMEM |
7eddd99c | 144 | select OLD_SIGACTION |
93bead43 | 145 | select OLD_SIGSUSPEND3 |
0e0d04a8 | 146 | select SYSCTL_EXCEPTION_TRACE |
0563416b | 147 | select TTY |
0e0d04a8 | 148 | select VIRT_CPU_ACCOUNTING |
93bead43 | 149 | select VIRT_TO_BUS |
308c09f1 | 150 | select ARCH_HAS_SG_CHAIN |
1da177e4 | 151 | |
fca3e357 | 152 | config SCHED_OMIT_FRAME_POINTER |
6f9a3c33 | 153 | def_bool y |
fca3e357 | 154 | |
1da177e4 LT |
155 | source "init/Kconfig" |
156 | ||
dc52ddc0 MH |
157 | source "kernel/Kconfig.freezer" |
158 | ||
843c48fd JG |
159 | menu "Processor type and features" |
160 | ||
161 | config HAVE_MARCH_Z900_FEATURES | |
162 | def_bool n | |
163 | ||
164 | config HAVE_MARCH_Z990_FEATURES | |
165 | def_bool n | |
166 | select HAVE_MARCH_Z900_FEATURES | |
167 | ||
168 | config HAVE_MARCH_Z9_109_FEATURES | |
169 | def_bool n | |
170 | select HAVE_MARCH_Z990_FEATURES | |
171 | ||
172 | config HAVE_MARCH_Z10_FEATURES | |
173 | def_bool n | |
174 | select HAVE_MARCH_Z9_109_FEATURES | |
175 | ||
176 | config HAVE_MARCH_Z196_FEATURES | |
177 | def_bool n | |
178 | select HAVE_MARCH_Z10_FEATURES | |
179 | ||
991c1505 HC |
180 | config HAVE_MARCH_ZEC12_FEATURES |
181 | def_bool n | |
182 | select HAVE_MARCH_Z196_FEATURES | |
183 | ||
843c48fd JG |
184 | choice |
185 | prompt "Processor type" | |
186 | default MARCH_G5 | |
187 | ||
188 | config MARCH_G5 | |
189 | bool "System/390 model G5 and G6" | |
190 | depends on !64BIT | |
191 | help | |
192 | Select this to build a 31 bit kernel that works | |
193 | on all ESA/390 and z/Architecture machines. | |
1da177e4 | 194 | |
843c48fd JG |
195 | config MARCH_Z900 |
196 | bool "IBM zSeries model z800 and z900" | |
197 | select HAVE_MARCH_Z900_FEATURES if 64BIT | |
198 | help | |
199 | Select this to enable optimizations for model z800/z900 (2064 and | |
200 | 2066 series). This will enable some optimizations that are not | |
201 | available on older ESA/390 (31 Bit) only CPUs. | |
202 | ||
203 | config MARCH_Z990 | |
204 | bool "IBM zSeries model z890 and z990" | |
205 | select HAVE_MARCH_Z990_FEATURES if 64BIT | |
206 | help | |
207 | Select this to enable optimizations for model z890/z990 (2084 and | |
208 | 2086 series). The kernel will be slightly faster but will not work | |
209 | on older machines. | |
210 | ||
211 | config MARCH_Z9_109 | |
212 | bool "IBM System z9" | |
213 | select HAVE_MARCH_Z9_109_FEATURES if 64BIT | |
214 | help | |
215 | Select this to enable optimizations for IBM System z9 (2094 and | |
216 | 2096 series). The kernel will be slightly faster but will not work | |
217 | on older machines. | |
218 | ||
219 | config MARCH_Z10 | |
220 | bool "IBM System z10" | |
221 | select HAVE_MARCH_Z10_FEATURES if 64BIT | |
222 | help | |
223 | Select this to enable optimizations for IBM System z10 (2097 and | |
224 | 2098 series). The kernel will be slightly faster but will not work | |
225 | on older machines. | |
226 | ||
227 | config MARCH_Z196 | |
228 | bool "IBM zEnterprise 114 and 196" | |
229 | select HAVE_MARCH_Z196_FEATURES if 64BIT | |
230 | help | |
231 | Select this to enable optimizations for IBM zEnterprise 114 and 196 | |
232 | (2818 and 2817 series). The kernel will be slightly faster but will | |
233 | not work on older machines. | |
1da177e4 | 234 | |
991c1505 | 235 | config MARCH_ZEC12 |
59471227 | 236 | bool "IBM zBC12 and zEC12" |
991c1505 HC |
237 | select HAVE_MARCH_ZEC12_FEATURES if 64BIT |
238 | help | |
59471227 HC |
239 | Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and |
240 | 2827 series). The kernel will be slightly faster but will not work on | |
241 | older machines. | |
991c1505 | 242 | |
843c48fd | 243 | endchoice |
1da177e4 | 244 | |
1db9e051 HC |
245 | config MARCH_G5_TUNE |
246 | def_bool TUNE_G5 || MARCH_G5 && TUNE_DEFAULT | |
247 | ||
248 | config MARCH_Z900_TUNE | |
249 | def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT | |
250 | ||
251 | config MARCH_Z990_TUNE | |
252 | def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT | |
253 | ||
254 | config MARCH_Z9_109_TUNE | |
255 | def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT | |
256 | ||
257 | config MARCH_Z10_TUNE | |
258 | def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT | |
259 | ||
260 | config MARCH_Z196_TUNE | |
261 | def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT | |
262 | ||
263 | config MARCH_ZEC12_TUNE | |
264 | def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT | |
265 | ||
266 | choice | |
267 | prompt "Tune code generation" | |
268 | default TUNE_DEFAULT | |
269 | help | |
270 | Cause the compiler to tune (-mtune) the generated code for a machine. | |
271 | This will make the code run faster on the selected machine but | |
272 | somewhat slower on other machines. | |
273 | This option only changes how the compiler emits instructions, not the | |
274 | selection of instructions itself, so the resulting kernel will run on | |
275 | all other machines. | |
276 | ||
277 | config TUNE_DEFAULT | |
278 | bool "Default" | |
279 | help | |
280 | Tune the generated code for the target processor for which the kernel | |
281 | will be compiled. | |
282 | ||
283 | config TUNE_G5 | |
284 | bool "System/390 model G5 and G6" | |
285 | ||
286 | config TUNE_Z900 | |
287 | bool "IBM zSeries model z800 and z900" | |
288 | ||
289 | config TUNE_Z990 | |
290 | bool "IBM zSeries model z890 and z990" | |
291 | ||
292 | config TUNE_Z9_109 | |
293 | bool "IBM System z9" | |
294 | ||
295 | config TUNE_Z10 | |
296 | bool "IBM System z10" | |
297 | ||
298 | config TUNE_Z196 | |
299 | bool "IBM zEnterprise 114 and 196" | |
300 | ||
301 | config TUNE_ZEC12 | |
302 | bool "IBM zBC12 and zEC12" | |
303 | ||
304 | endchoice | |
305 | ||
347a8dc3 | 306 | config 64BIT |
6f9a3c33 MS |
307 | def_bool y |
308 | prompt "64 bit kernel" | |
1da177e4 | 309 | help |
db81a23d | 310 | Select this option if you have an IBM z/Architecture machine |
1da177e4 LT |
311 | and want to use the 64 bit addressing mode. |
312 | ||
d9f7a745 | 313 | config 32BIT |
6f9a3c33 | 314 | def_bool y if !64BIT |
d9f7a745 | 315 | |
843c48fd JG |
316 | config COMPAT |
317 | def_bool y | |
318 | prompt "Kernel support for 31 bit emulation" | |
319 | depends on 64BIT | |
320 | select COMPAT_BINFMT_ELF if BINFMT_ELF | |
321 | select ARCH_WANT_OLD_COMPAT_IPC | |
7eddd99c | 322 | select COMPAT_OLD_SIGACTION |
843c48fd JG |
323 | help |
324 | Select this option if you want to enable your system kernel to | |
325 | handle system-calls from ELF binaries for 31 bit ESA. This option | |
326 | (and some other stuff like libraries and such) is needed for | |
327 | executing 31 bit applications. It is safe to say "Y". | |
328 | ||
329 | config SYSVIPC_COMPAT | |
330 | def_bool y if COMPAT && SYSVIPC | |
331 | ||
332 | config KEYS_COMPAT | |
333 | def_bool y if COMPAT && KEYS | |
334 | ||
1da177e4 | 335 | config SMP |
6f9a3c33 MS |
336 | def_bool y |
337 | prompt "Symmetric multi-processing support" | |
1da177e4 LT |
338 | ---help--- |
339 | This enables support for systems with more than one CPU. If you have | |
340 | a system with only one CPU, like most personal computers, say N. If | |
341 | you have a system with more than one CPU, say Y. | |
342 | ||
4a474157 | 343 | If you say N here, the kernel will run on uni- and multiprocessor |
1da177e4 LT |
344 | machines, but will use only one CPU of a multiprocessor machine. If |
345 | you say Y here, the kernel will run on many, but not all, | |
4a474157 | 346 | uniprocessor machines. On a uniprocessor machine, the kernel |
1da177e4 LT |
347 | will run faster if you say N here. |
348 | ||
03502faa AB |
349 | See also the SMP-HOWTO available at |
350 | <http://www.tldp.org/docs.html#howto>. | |
1da177e4 LT |
351 | |
352 | Even if you don't know what to do here, say Y. | |
353 | ||
354 | config NR_CPUS | |
8cb04be8 XVP |
355 | int "Maximum number of CPUs (2-256)" |
356 | range 2 256 | |
1da177e4 | 357 | depends on SMP |
057c5cb3 HC |
358 | default "32" if !64BIT |
359 | default "64" if 64BIT | |
1da177e4 LT |
360 | help |
361 | This allows you to specify the maximum number of CPUs which this | |
8cb04be8 | 362 | kernel will support. The maximum supported value is 256 and the |
1da177e4 LT |
363 | minimum value which makes sense is 2. |
364 | ||
365 | This is purely to save memory - each supported CPU adds | |
366 | approximately sixteen kilobytes to the kernel image. | |
367 | ||
368 | config HOTPLUG_CPU | |
6f9a3c33 MS |
369 | def_bool y |
370 | prompt "Support for hot-pluggable CPUs" | |
1da177e4 | 371 | depends on SMP |
1da177e4 LT |
372 | help |
373 | Say Y here to be able to turn CPUs off and on. CPUs | |
374 | can be controlled through /sys/devices/system/cpu/cpu#. | |
375 | Say N if you want to disable CPU hotplug. | |
376 | ||
8d11e021 | 377 | config SCHED_MC |
83a24e32 | 378 | def_bool n |
8d11e021 | 379 | |
4cb14bc8 | 380 | config SCHED_BOOK |
6f9a3c33 MS |
381 | def_bool y |
382 | prompt "Book scheduler support" | |
83a24e32 HC |
383 | depends on SMP |
384 | select SCHED_MC | |
4cb14bc8 HC |
385 | help |
386 | Book scheduler support improves the CPU scheduler's decision making | |
387 | when dealing with machines that have several books. | |
388 | ||
843c48fd JG |
389 | source kernel/Kconfig.preempt |
390 | ||
1da177e4 | 391 | config MATHEMU |
6f9a3c33 MS |
392 | def_bool y |
393 | prompt "IEEE FPU emulation" | |
1da177e4 LT |
394 | depends on MARCH_G5 |
395 | help | |
396 | This option is required for IEEE compliant floating point arithmetic | |
db81a23d | 397 | on older ESA/390 machines. Say Y unless you know your machine doesn't |
1da177e4 LT |
398 | need this. |
399 | ||
843c48fd | 400 | source kernel/Kconfig.hz |
1da177e4 | 401 | |
843c48fd | 402 | endmenu |
1da177e4 | 403 | |
843c48fd | 404 | menu "Memory setup" |
1d057720 | 405 | |
843c48fd | 406 | config ARCH_SPARSEMEM_ENABLE |
6f9a3c33 | 407 | def_bool y |
843c48fd JG |
408 | select SPARSEMEM_VMEMMAP_ENABLE |
409 | select SPARSEMEM_VMEMMAP | |
410 | select SPARSEMEM_STATIC if !64BIT | |
e65e1fc2 | 411 | |
843c48fd JG |
412 | config ARCH_SPARSEMEM_DEFAULT |
413 | def_bool y | |
1da177e4 | 414 | |
843c48fd JG |
415 | config ARCH_SELECT_MEMORY_MODEL |
416 | def_bool y | |
1da177e4 | 417 | |
843c48fd JG |
418 | config ARCH_ENABLE_MEMORY_HOTPLUG |
419 | def_bool y if SPARSEMEM | |
0efa4703 | 420 | |
843c48fd JG |
421 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
422 | def_bool y | |
e37f50e1 | 423 | |
ec66ad66 MS |
424 | config ARCH_ENABLE_SPLIT_PMD_PTLOCK |
425 | def_bool y | |
426 | depends on 64BIT | |
427 | ||
843c48fd JG |
428 | config FORCE_MAX_ZONEORDER |
429 | int | |
430 | default "9" | |
f861e405 | 431 | |
843c48fd | 432 | source "mm/Kconfig" |
1da177e4 LT |
433 | |
434 | config PACK_STACK | |
6f9a3c33 MS |
435 | def_bool y |
436 | prompt "Pack kernel stack" | |
1da177e4 LT |
437 | help |
438 | This option enables the compiler option -mkernel-backchain if it | |
439 | is available. If the option is available the compiler supports | |
440 | the new stack layout which dramatically reduces the minimum stack | |
441 | frame size. With an old compiler a non-leaf function needs a | |
442 | minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With | |
443 | -mkernel-backchain the minimum size drops to 16 byte on 31 bit | |
444 | and 24 byte on 64 bit. | |
445 | ||
446 | Say Y if you are unsure. | |
447 | ||
1da177e4 | 448 | config CHECK_STACK |
6f9a3c33 MS |
449 | def_bool y |
450 | prompt "Detect kernel stack overflow" | |
1da177e4 LT |
451 | help |
452 | This option enables the compiler option -mstack-guard and | |
453 | -mstack-size if they are available. If the compiler supports them | |
454 | it will emit additional code to each function prolog to trigger | |
455 | an illegal operation if the kernel stack is about to overflow. | |
456 | ||
457 | Say N if you are unsure. | |
458 | ||
459 | config STACK_GUARD | |
460 | int "Size of the guard area (128-1024)" | |
461 | range 128 1024 | |
462 | depends on CHECK_STACK | |
463 | default "256" | |
464 | help | |
465 | This allows you to specify the size of the guard area at the lower | |
466 | end of the kernel stack. If the kernel stack points into the guard | |
467 | area on function entry an illegal operation is triggered. The size | |
468 | needs to be a power of 2. Please keep in mind that the size of an | |
469 | interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit. | |
470 | The minimum size for the stack guard should be 256 for 31 bit and | |
471 | 512 for 64 bit. | |
472 | ||
2c190da4 | 473 | config WARN_DYNAMIC_STACK |
6f9a3c33 | 474 | def_bool n |
2c190da4 | 475 | prompt "Emit compiler warnings for function with dynamic stack usage" |
1da177e4 | 476 | help |
2c190da4 JG |
477 | This option enables the compiler option -mwarn-dynamicstack. If the |
478 | compiler supports this options generates warnings for functions | |
479 | that dynamically allocate stack space using alloca. | |
1da177e4 LT |
480 | |
481 | Say N if you are unsure. | |
482 | ||
843c48fd | 483 | endmenu |
3f22ab27 | 484 | |
843c48fd | 485 | menu "I/O subsystem" |
1da177e4 | 486 | |
1da177e4 | 487 | config QDIO |
6f9a3c33 MS |
488 | def_tristate y |
489 | prompt "QDIO support" | |
1da177e4 | 490 | ---help--- |
8129ee16 | 491 | This driver provides the Queued Direct I/O base support for |
efca13bc | 492 | IBM System z. |
1da177e4 LT |
493 | |
494 | To compile this driver as a module, choose M here: the | |
495 | module will be called qdio. | |
496 | ||
497 | If unsure, say Y. | |
498 | ||
c8717a3d JG |
499 | menuconfig PCI |
500 | bool "PCI support" | |
501 | default n | |
502 | depends on 64BIT | |
c8717a3d JG |
503 | select PCI_MSI |
504 | help | |
505 | Enable PCI support. | |
506 | ||
507 | if PCI | |
508 | ||
509 | config PCI_NR_FUNCTIONS | |
510 | int "Maximum number of PCI functions (1-4096)" | |
511 | range 1 4096 | |
512 | default "64" | |
513 | help | |
514 | This allows you to specify the maximum number of PCI functions which | |
515 | this kernel will support. | |
516 | ||
1f44a225 MS |
517 | config PCI_NR_MSI |
518 | int "Maximum number of MSI interrupts (64-32768)" | |
519 | range 64 32768 | |
520 | default "256" | |
521 | help | |
522 | This defines the number of virtual interrupts the kernel will | |
523 | provide for MSI interrupts. If you configure your system to have | |
524 | too few drivers will fail to allocate MSI interrupts for all | |
525 | PCI devices. | |
526 | ||
c8717a3d JG |
527 | source "drivers/pci/Kconfig" |
528 | source "drivers/pci/pcie/Kconfig" | |
529 | source "drivers/pci/hotplug/Kconfig" | |
530 | ||
531 | endif # PCI | |
532 | ||
533 | config PCI_DOMAINS | |
534 | def_bool PCI | |
535 | ||
536 | config HAS_IOMEM | |
537 | def_bool PCI | |
538 | ||
539 | config IOMMU_HELPER | |
540 | def_bool PCI | |
541 | ||
542 | config HAS_DMA | |
543 | def_bool PCI | |
544 | select HAVE_DMA_API_DEBUG | |
545 | ||
546 | config NEED_SG_DMA_LENGTH | |
547 | def_bool PCI | |
548 | ||
549 | config HAVE_DMA_ATTRS | |
550 | def_bool PCI | |
551 | ||
91630032 JG |
552 | config NEED_DMA_MAP_STATE |
553 | def_bool PCI | |
554 | ||
9d92a7e1 | 555 | config CHSC_SCH |
d9c11b1e | 556 | def_tristate m |
6f9a3c33 | 557 | prompt "Support for CHSC subchannels" |
9d92a7e1 CH |
558 | help |
559 | This driver allows usage of CHSC subchannels. A CHSC subchannel | |
560 | is usually present on LPAR only. | |
561 | The driver creates a device /dev/chsc, which may be used to | |
562 | obtain I/O configuration information about the machine and | |
563 | to issue asynchronous chsc commands (DANGEROUS). | |
564 | You will usually only want to use this interface on a special | |
565 | LPAR designated for system management. | |
566 | ||
567 | To compile this driver as a module, choose M here: the | |
568 | module will be called chsc_sch. | |
569 | ||
570 | If unsure, say N. | |
571 | ||
1d1c8f78 SO |
572 | config SCM_BUS |
573 | def_bool y | |
574 | depends on 64BIT | |
575 | prompt "SCM bus driver" | |
576 | help | |
577 | Bus driver for Storage Class Memory. | |
578 | ||
eadb86ab SO |
579 | config EADM_SCH |
580 | def_tristate m | |
581 | prompt "Support for EADM subchannels" | |
582 | depends on SCM_BUS | |
583 | help | |
584 | This driver allows usage of EADM subchannels. EADM subchannels act | |
585 | as a communication vehicle for SCM increments. | |
586 | ||
587 | To compile this driver as a module, choose M here: the | |
588 | module will be called eadm_sch. | |
589 | ||
843c48fd JG |
590 | endmenu |
591 | ||
592 | menu "Dump support" | |
593 | ||
594 | config CRASH_DUMP | |
595 | bool "kernel crash dumps" | |
596 | depends on 64BIT && SMP | |
597 | select KEXEC | |
598 | help | |
599 | Generate crash dump after being started by kexec. | |
600 | Crash dump kernels are loaded in the main kernel with kexec-tools | |
601 | into a specially reserved region and then later executed after | |
602 | a crash by kdump/kexec. | |
843c48fd | 603 | Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this. |
bf28a597 MH |
604 | This option also enables s390 zfcpdump. |
605 | See also <file:Documentation/s390/zfcpdump.txt> | |
843c48fd JG |
606 | |
607 | endmenu | |
608 | ||
609 | menu "Executable file formats / Emulations" | |
1da177e4 | 610 | |
1da177e4 LT |
611 | source "fs/Kconfig.binfmt" |
612 | ||
843c48fd JG |
613 | config SECCOMP |
614 | def_bool y | |
615 | prompt "Enable seccomp to safely compute untrusted bytecode" | |
616 | depends on PROC_FS | |
617 | help | |
618 | This kernel feature is useful for number crunching applications | |
619 | that may need to compute untrusted bytecode during their | |
620 | execution. By using pipes or other transports made available to | |
621 | the process as file descriptors supporting the read/write | |
622 | syscalls, it's possible to isolate those applications in | |
623 | their own address space using seccomp. Once seccomp is | |
624 | enabled via /proc/<pid>/seccomp, it cannot be disabled | |
625 | and the task is only allowed to execute a few safe syscalls | |
626 | defined by each seccomp mode. | |
627 | ||
628 | If unsure, say Y. | |
629 | ||
630 | endmenu | |
631 | ||
632 | menu "Power Management" | |
633 | ||
634 | config ARCH_HIBERNATION_POSSIBLE | |
635 | def_bool y if 64BIT | |
636 | ||
637 | source "kernel/power/Kconfig" | |
638 | ||
639 | endmenu | |
640 | ||
641 | source "net/Kconfig" | |
642 | ||
643 | config PCMCIA | |
644 | def_bool n | |
645 | ||
646 | config CCW | |
647 | def_bool y | |
648 | ||
649 | source "drivers/Kconfig" | |
650 | ||
651 | source "fs/Kconfig" | |
652 | ||
653 | source "arch/s390/Kconfig.debug" | |
654 | ||
655 | source "security/Kconfig" | |
656 | ||
657 | source "crypto/Kconfig" | |
658 | ||
659 | source "lib/Kconfig" | |
660 | ||
661 | menu "Virtualization" | |
684de39b | 662 | |
1da177e4 | 663 | config PFAULT |
6f9a3c33 MS |
664 | def_bool y |
665 | prompt "Pseudo page fault support" | |
1da177e4 LT |
666 | help |
667 | Select this option, if you want to use PFAULT pseudo page fault | |
668 | handling under VM. If running native or in LPAR, this option | |
669 | has no effect. If your VM does not support PFAULT, PAGEEX | |
670 | pseudo page fault handling will be used. | |
671 | Note that VM 4.2 supports PFAULT but has a bug in its | |
672 | implementation that causes some problems. | |
673 | Everybody who wants to run Linux under VM != VM4.2 should select | |
674 | this option. | |
675 | ||
676 | config SHARED_KERNEL | |
0eccc783 HC |
677 | bool "VM shared kernel support" |
678 | depends on !JUMP_LABEL | |
1da177e4 LT |
679 | help |
680 | Select this option, if you want to share the text segment of the | |
681 | Linux kernel between different VM guests. This reduces memory | |
682 | usage with lots of guests but greatly increases kernel size. | |
9c9c1761 HC |
683 | Also if a kernel was IPL'ed from a shared segment the kexec system |
684 | call will not work. | |
1da177e4 LT |
685 | You should only select this option if you know what you are |
686 | doing and want to exploit this feature. | |
687 | ||
688 | config CMM | |
6f9a3c33 MS |
689 | def_tristate n |
690 | prompt "Cooperative memory management" | |
1da177e4 LT |
691 | help |
692 | Select this option, if you want to enable the kernel interface | |
693 | to reduce the memory size of the system. This is accomplished | |
694 | by allocating pages of memory and put them "on hold". This only | |
695 | makes sense for a system running under VM where the unused pages | |
696 | will be reused by VM for other guest systems. The interface | |
697 | allows an external monitor to balance memory of many systems. | |
698 | Everybody who wants to run Linux under VM should select this | |
699 | option. | |
700 | ||
1da177e4 | 701 | config CMM_IUCV |
6f9a3c33 MS |
702 | def_bool y |
703 | prompt "IUCV special message interface to cooperative memory management" | |
1da177e4 LT |
704 | depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV) |
705 | help | |
706 | Select this option to enable the special message interface to | |
707 | the cooperative memory management. | |
708 | ||
1da177e4 | 709 | config APPLDATA_BASE |
6f9a3c33 MS |
710 | def_bool n |
711 | prompt "Linux - VM Monitor Stream, base infrastructure" | |
c185b783 | 712 | depends on PROC_FS |
1da177e4 LT |
713 | help |
714 | This provides a kernel interface for creating and updating z/VM APPLDATA | |
715 | monitor records. The monitor records are updated at certain time | |
716 | intervals, once the timer is started. | |
717 | Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer, | |
718 | i.e. enables or disables monitoring on the Linux side. | |
719 | A custom interval value (in seconds) can be written to | |
720 | /proc/appldata/interval. | |
721 | ||
722 | Defaults are 60 seconds interval and timer off. | |
723 | The /proc entries can also be read from, showing the current settings. | |
724 | ||
725 | config APPLDATA_MEM | |
6f9a3c33 MS |
726 | def_tristate m |
727 | prompt "Monitor memory management statistics" | |
62fb2ba3 | 728 | depends on APPLDATA_BASE && VM_EVENT_COUNTERS |
1da177e4 LT |
729 | help |
730 | This provides memory management related data to the Linux - VM Monitor | |
731 | Stream, like paging/swapping rate, memory utilisation, etc. | |
732 | Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM | |
733 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
734 | on the z/VM side. | |
735 | ||
736 | Default is disabled. | |
737 | The /proc entry can also be read from, showing the current settings. | |
738 | ||
739 | This can also be compiled as a module, which will be called | |
740 | appldata_mem.o. | |
741 | ||
742 | config APPLDATA_OS | |
6f9a3c33 MS |
743 | def_tristate m |
744 | prompt "Monitor OS statistics" | |
1da177e4 LT |
745 | depends on APPLDATA_BASE |
746 | help | |
747 | This provides OS related data to the Linux - VM Monitor Stream, like | |
748 | CPU utilisation, etc. | |
749 | Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM | |
750 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
751 | on the z/VM side. | |
752 | ||
753 | Default is disabled. | |
754 | This can also be compiled as a module, which will be called | |
755 | appldata_os.o. | |
756 | ||
757 | config APPLDATA_NET_SUM | |
6f9a3c33 MS |
758 | def_tristate m |
759 | prompt "Monitor overall network statistics" | |
70193af9 | 760 | depends on APPLDATA_BASE && NET |
1da177e4 LT |
761 | help |
762 | This provides network related data to the Linux - VM Monitor Stream, | |
763 | currently there is only a total sum of network I/O statistics, no | |
764 | per-interface data. | |
765 | Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM | |
766 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
767 | on the z/VM side. | |
768 | ||
769 | Default is disabled. | |
770 | This can also be compiled as a module, which will be called | |
771 | appldata_net_sum.o. | |
772 | ||
24bbb1fa | 773 | config S390_HYPFS_FS |
6f9a3c33 MS |
774 | def_bool y |
775 | prompt "s390 hypervisor file system support" | |
24bbb1fa | 776 | select SYS_HYPERVISOR |
24bbb1fa MH |
777 | help |
778 | This is a virtual file system intended to provide accounting | |
779 | information in an s390 hypervisor environment. | |
780 | ||
843c48fd | 781 | source "arch/s390/kvm/Kconfig" |
411ed322 | 782 | |
fa587743 | 783 | config S390_GUEST |
6f9a3c33 | 784 | def_bool y |
510cf5a6 KC |
785 | prompt "s390 support for virtio devices" |
786 | depends on 64BIT | |
79b6f7fb | 787 | select TTY |
80629b0b | 788 | select VIRTUALIZATION |
fa587743 | 789 | select VIRTIO |
faeba830 | 790 | select VIRTIO_CONSOLE |
fa587743 | 791 | help |
bdd1fc27 CH |
792 | Enabling this option adds support for virtio based paravirtual device |
793 | drivers on s390. | |
1da177e4 | 794 | |
20766c08 | 795 | Select this option if you want to run the kernel as a guest under |
bdd1fc27 | 796 | the KVM hypervisor. |
155af2f9 HJP |
797 | |
798 | endmenu |