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 | |
0e0d04a8 | 120 | select HAVE_DEBUG_KMEMLEAK |
53255c9a | 121 | select HAVE_DYNAMIC_FTRACE if 64BIT |
10dec7db | 122 | select HAVE_DYNAMIC_FTRACE_WITH_REGS if 64BIT |
0e0d04a8 | 123 | select HAVE_FTRACE_MCOUNT_RECORD |
53255c9a HC |
124 | select HAVE_FUNCTION_GRAPH_TRACER if 64BIT |
125 | select HAVE_FUNCTION_TRACER if 64BIT | |
03b8c7b6 | 126 | select HAVE_FUTEX_CMPXCHG if FUTEX |
0e0d04a8 HC |
127 | select HAVE_KERNEL_BZIP2 |
128 | select HAVE_KERNEL_GZIP | |
8e2872ce | 129 | select HAVE_KERNEL_LZ4 |
0e0d04a8 HC |
130 | select HAVE_KERNEL_LZMA |
131 | select HAVE_KERNEL_LZO | |
132 | select HAVE_KERNEL_XZ | |
133 | select HAVE_KPROBES | |
134 | select HAVE_KRETPROBES | |
135 | select HAVE_KVM if 64BIT | |
136 | select HAVE_MEMBLOCK | |
137 | select HAVE_MEMBLOCK_NODE_MAP | |
50be6345 | 138 | select HAVE_MEMBLOCK_PHYS_MAP |
786d35d4 | 139 | select HAVE_MOD_ARCH_SPECIFIC |
0e0d04a8 HC |
140 | select HAVE_OPROFILE |
141 | select HAVE_PERF_EVENTS | |
142 | select HAVE_REGS_AND_STACK_ACCESS_API | |
143 | select HAVE_SYSCALL_TRACEPOINTS | |
0e0d04a8 HC |
144 | select HAVE_UID16 if 32BIT |
145 | select HAVE_VIRT_CPU_ACCOUNTING | |
786d35d4 | 146 | select MODULES_USE_ELF_RELA |
50be6345 | 147 | select NO_BOOTMEM |
7eddd99c | 148 | select OLD_SIGACTION |
93bead43 | 149 | select OLD_SIGSUSPEND3 |
0e0d04a8 | 150 | select SYSCTL_EXCEPTION_TRACE |
0563416b | 151 | select TTY |
0e0d04a8 | 152 | select VIRT_CPU_ACCOUNTING |
93bead43 | 153 | select VIRT_TO_BUS |
1da177e4 | 154 | |
fca3e357 | 155 | config SCHED_OMIT_FRAME_POINTER |
6f9a3c33 | 156 | def_bool y |
fca3e357 | 157 | |
1da177e4 LT |
158 | source "init/Kconfig" |
159 | ||
dc52ddc0 MH |
160 | source "kernel/Kconfig.freezer" |
161 | ||
843c48fd JG |
162 | menu "Processor type and features" |
163 | ||
164 | config HAVE_MARCH_Z900_FEATURES | |
165 | def_bool n | |
166 | ||
167 | config HAVE_MARCH_Z990_FEATURES | |
168 | def_bool n | |
169 | select HAVE_MARCH_Z900_FEATURES | |
170 | ||
171 | config HAVE_MARCH_Z9_109_FEATURES | |
172 | def_bool n | |
173 | select HAVE_MARCH_Z990_FEATURES | |
174 | ||
175 | config HAVE_MARCH_Z10_FEATURES | |
176 | def_bool n | |
177 | select HAVE_MARCH_Z9_109_FEATURES | |
178 | ||
179 | config HAVE_MARCH_Z196_FEATURES | |
180 | def_bool n | |
181 | select HAVE_MARCH_Z10_FEATURES | |
182 | ||
991c1505 HC |
183 | config HAVE_MARCH_ZEC12_FEATURES |
184 | def_bool n | |
185 | select HAVE_MARCH_Z196_FEATURES | |
186 | ||
f8b2dcbd MS |
187 | config HAVE_MARCH_Z13_FEATURES |
188 | def_bool n | |
189 | select HAVE_MARCH_ZEC12_FEATURES | |
190 | ||
843c48fd JG |
191 | choice |
192 | prompt "Processor type" | |
193 | default MARCH_G5 | |
194 | ||
195 | config MARCH_G5 | |
196 | bool "System/390 model G5 and G6" | |
197 | depends on !64BIT | |
198 | help | |
199 | Select this to build a 31 bit kernel that works | |
200 | on all ESA/390 and z/Architecture machines. | |
1da177e4 | 201 | |
843c48fd JG |
202 | config MARCH_Z900 |
203 | bool "IBM zSeries model z800 and z900" | |
204 | select HAVE_MARCH_Z900_FEATURES if 64BIT | |
205 | help | |
206 | Select this to enable optimizations for model z800/z900 (2064 and | |
207 | 2066 series). This will enable some optimizations that are not | |
208 | available on older ESA/390 (31 Bit) only CPUs. | |
209 | ||
210 | config MARCH_Z990 | |
211 | bool "IBM zSeries model z890 and z990" | |
212 | select HAVE_MARCH_Z990_FEATURES if 64BIT | |
213 | help | |
214 | Select this to enable optimizations for model z890/z990 (2084 and | |
215 | 2086 series). The kernel will be slightly faster but will not work | |
216 | on older machines. | |
217 | ||
218 | config MARCH_Z9_109 | |
219 | bool "IBM System z9" | |
220 | select HAVE_MARCH_Z9_109_FEATURES if 64BIT | |
221 | help | |
222 | Select this to enable optimizations for IBM System z9 (2094 and | |
223 | 2096 series). The kernel will be slightly faster but will not work | |
224 | on older machines. | |
225 | ||
226 | config MARCH_Z10 | |
227 | bool "IBM System z10" | |
228 | select HAVE_MARCH_Z10_FEATURES if 64BIT | |
229 | help | |
230 | Select this to enable optimizations for IBM System z10 (2097 and | |
231 | 2098 series). The kernel will be slightly faster but will not work | |
232 | on older machines. | |
233 | ||
234 | config MARCH_Z196 | |
235 | bool "IBM zEnterprise 114 and 196" | |
236 | select HAVE_MARCH_Z196_FEATURES if 64BIT | |
237 | help | |
238 | Select this to enable optimizations for IBM zEnterprise 114 and 196 | |
239 | (2818 and 2817 series). The kernel will be slightly faster but will | |
240 | not work on older machines. | |
1da177e4 | 241 | |
991c1505 | 242 | config MARCH_ZEC12 |
59471227 | 243 | bool "IBM zBC12 and zEC12" |
991c1505 HC |
244 | select HAVE_MARCH_ZEC12_FEATURES if 64BIT |
245 | help | |
59471227 HC |
246 | Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and |
247 | 2827 series). The kernel will be slightly faster but will not work on | |
248 | older machines. | |
991c1505 | 249 | |
f8b2dcbd MS |
250 | config MARCH_Z13 |
251 | bool "IBM z13" | |
252 | select HAVE_MARCH_Z13_FEATURES if 64BIT | |
253 | help | |
254 | Select this to enable optimizations for IBM z13 (2964 series). | |
255 | The kernel will be slightly faster but will not work on older | |
256 | machines. | |
257 | ||
843c48fd | 258 | endchoice |
1da177e4 | 259 | |
1db9e051 HC |
260 | config MARCH_G5_TUNE |
261 | def_bool TUNE_G5 || MARCH_G5 && TUNE_DEFAULT | |
262 | ||
263 | config MARCH_Z900_TUNE | |
264 | def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT | |
265 | ||
266 | config MARCH_Z990_TUNE | |
267 | def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT | |
268 | ||
269 | config MARCH_Z9_109_TUNE | |
270 | def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT | |
271 | ||
272 | config MARCH_Z10_TUNE | |
273 | def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT | |
274 | ||
275 | config MARCH_Z196_TUNE | |
276 | def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT | |
277 | ||
278 | config MARCH_ZEC12_TUNE | |
279 | def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT | |
280 | ||
f8b2dcbd MS |
281 | config MARCH_Z13_TUNE |
282 | def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT | |
283 | ||
1db9e051 HC |
284 | choice |
285 | prompt "Tune code generation" | |
286 | default TUNE_DEFAULT | |
287 | help | |
288 | Cause the compiler to tune (-mtune) the generated code for a machine. | |
289 | This will make the code run faster on the selected machine but | |
290 | somewhat slower on other machines. | |
291 | This option only changes how the compiler emits instructions, not the | |
292 | selection of instructions itself, so the resulting kernel will run on | |
293 | all other machines. | |
294 | ||
295 | config TUNE_DEFAULT | |
296 | bool "Default" | |
297 | help | |
298 | Tune the generated code for the target processor for which the kernel | |
299 | will be compiled. | |
300 | ||
301 | config TUNE_G5 | |
302 | bool "System/390 model G5 and G6" | |
303 | ||
304 | config TUNE_Z900 | |
305 | bool "IBM zSeries model z800 and z900" | |
306 | ||
307 | config TUNE_Z990 | |
308 | bool "IBM zSeries model z890 and z990" | |
309 | ||
310 | config TUNE_Z9_109 | |
311 | bool "IBM System z9" | |
312 | ||
313 | config TUNE_Z10 | |
314 | bool "IBM System z10" | |
315 | ||
316 | config TUNE_Z196 | |
317 | bool "IBM zEnterprise 114 and 196" | |
318 | ||
319 | config TUNE_ZEC12 | |
320 | bool "IBM zBC12 and zEC12" | |
321 | ||
f8b2dcbd MS |
322 | config TUNE_Z13 |
323 | bool "IBM z13" | |
324 | ||
1db9e051 HC |
325 | endchoice |
326 | ||
347a8dc3 | 327 | config 64BIT |
6f9a3c33 MS |
328 | def_bool y |
329 | prompt "64 bit kernel" | |
1da177e4 | 330 | help |
db81a23d | 331 | Select this option if you have an IBM z/Architecture machine |
1da177e4 LT |
332 | and want to use the 64 bit addressing mode. |
333 | ||
d9f7a745 | 334 | config 32BIT |
6f9a3c33 | 335 | def_bool y if !64BIT |
d9f7a745 | 336 | |
843c48fd JG |
337 | config COMPAT |
338 | def_bool y | |
339 | prompt "Kernel support for 31 bit emulation" | |
340 | depends on 64BIT | |
341 | select COMPAT_BINFMT_ELF if BINFMT_ELF | |
342 | select ARCH_WANT_OLD_COMPAT_IPC | |
7eddd99c | 343 | select COMPAT_OLD_SIGACTION |
843c48fd JG |
344 | help |
345 | Select this option if you want to enable your system kernel to | |
346 | handle system-calls from ELF binaries for 31 bit ESA. This option | |
347 | (and some other stuff like libraries and such) is needed for | |
348 | executing 31 bit applications. It is safe to say "Y". | |
349 | ||
350 | config SYSVIPC_COMPAT | |
351 | def_bool y if COMPAT && SYSVIPC | |
352 | ||
353 | config KEYS_COMPAT | |
354 | def_bool y if COMPAT && KEYS | |
355 | ||
1da177e4 | 356 | config SMP |
6f9a3c33 MS |
357 | def_bool y |
358 | prompt "Symmetric multi-processing support" | |
1da177e4 LT |
359 | ---help--- |
360 | This enables support for systems with more than one CPU. If you have | |
361 | a system with only one CPU, like most personal computers, say N. If | |
362 | you have a system with more than one CPU, say Y. | |
363 | ||
4a474157 | 364 | If you say N here, the kernel will run on uni- and multiprocessor |
1da177e4 LT |
365 | machines, but will use only one CPU of a multiprocessor machine. If |
366 | you say Y here, the kernel will run on many, but not all, | |
4a474157 | 367 | uniprocessor machines. On a uniprocessor machine, the kernel |
1da177e4 LT |
368 | will run faster if you say N here. |
369 | ||
03502faa AB |
370 | See also the SMP-HOWTO available at |
371 | <http://www.tldp.org/docs.html#howto>. | |
1da177e4 LT |
372 | |
373 | Even if you don't know what to do here, say Y. | |
374 | ||
375 | config NR_CPUS | |
5c75a0da HC |
376 | int "Maximum number of CPUs (2-512)" |
377 | range 2 512 | |
1da177e4 | 378 | depends on SMP |
057c5cb3 HC |
379 | default "32" if !64BIT |
380 | default "64" if 64BIT | |
1da177e4 LT |
381 | help |
382 | This allows you to specify the maximum number of CPUs which this | |
5c75a0da | 383 | kernel will support. The maximum supported value is 512 and the |
1da177e4 LT |
384 | minimum value which makes sense is 2. |
385 | ||
386 | This is purely to save memory - each supported CPU adds | |
387 | approximately sixteen kilobytes to the kernel image. | |
388 | ||
389 | config HOTPLUG_CPU | |
6f9a3c33 MS |
390 | def_bool y |
391 | prompt "Support for hot-pluggable CPUs" | |
1da177e4 | 392 | depends on SMP |
1da177e4 LT |
393 | help |
394 | Say Y here to be able to turn CPUs off and on. CPUs | |
395 | can be controlled through /sys/devices/system/cpu/cpu#. | |
396 | Say N if you want to disable CPU hotplug. | |
397 | ||
10ad34bc MS |
398 | config SCHED_SMT |
399 | def_bool n | |
400 | ||
8d11e021 | 401 | config SCHED_MC |
83a24e32 | 402 | def_bool n |
8d11e021 | 403 | |
4cb14bc8 | 404 | config SCHED_BOOK |
10ad34bc MS |
405 | def_bool n |
406 | ||
407 | config SCHED_TOPOLOGY | |
6f9a3c33 | 408 | def_bool y |
10ad34bc | 409 | prompt "Topology scheduler support" |
83a24e32 | 410 | depends on SMP |
10ad34bc | 411 | select SCHED_SMT |
83a24e32 | 412 | select SCHED_MC |
10ad34bc | 413 | select SCHED_BOOK |
4cb14bc8 | 414 | help |
10ad34bc MS |
415 | Topology scheduler support improves the CPU scheduler's decision |
416 | making when dealing with machines that have multi-threading, | |
417 | multiple cores or multiple books. | |
4cb14bc8 | 418 | |
843c48fd JG |
419 | source kernel/Kconfig.preempt |
420 | ||
1da177e4 | 421 | config MATHEMU |
6f9a3c33 MS |
422 | def_bool y |
423 | prompt "IEEE FPU emulation" | |
1da177e4 LT |
424 | depends on MARCH_G5 |
425 | help | |
426 | This option is required for IEEE compliant floating point arithmetic | |
db81a23d | 427 | on older ESA/390 machines. Say Y unless you know your machine doesn't |
1da177e4 LT |
428 | need this. |
429 | ||
843c48fd | 430 | source kernel/Kconfig.hz |
1da177e4 | 431 | |
843c48fd | 432 | endmenu |
1da177e4 | 433 | |
843c48fd | 434 | menu "Memory setup" |
1d057720 | 435 | |
843c48fd | 436 | config ARCH_SPARSEMEM_ENABLE |
6f9a3c33 | 437 | def_bool y |
843c48fd JG |
438 | select SPARSEMEM_VMEMMAP_ENABLE |
439 | select SPARSEMEM_VMEMMAP | |
440 | select SPARSEMEM_STATIC if !64BIT | |
e65e1fc2 | 441 | |
843c48fd JG |
442 | config ARCH_SPARSEMEM_DEFAULT |
443 | def_bool y | |
1da177e4 | 444 | |
843c48fd JG |
445 | config ARCH_SELECT_MEMORY_MODEL |
446 | def_bool y | |
1da177e4 | 447 | |
843c48fd JG |
448 | config ARCH_ENABLE_MEMORY_HOTPLUG |
449 | def_bool y if SPARSEMEM | |
0efa4703 | 450 | |
843c48fd JG |
451 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
452 | def_bool y | |
e37f50e1 | 453 | |
ec66ad66 MS |
454 | config ARCH_ENABLE_SPLIT_PMD_PTLOCK |
455 | def_bool y | |
456 | depends on 64BIT | |
457 | ||
843c48fd JG |
458 | config FORCE_MAX_ZONEORDER |
459 | int | |
460 | default "9" | |
f861e405 | 461 | |
843c48fd | 462 | source "mm/Kconfig" |
1da177e4 LT |
463 | |
464 | config PACK_STACK | |
6f9a3c33 MS |
465 | def_bool y |
466 | prompt "Pack kernel stack" | |
1da177e4 LT |
467 | help |
468 | This option enables the compiler option -mkernel-backchain if it | |
469 | is available. If the option is available the compiler supports | |
470 | the new stack layout which dramatically reduces the minimum stack | |
471 | frame size. With an old compiler a non-leaf function needs a | |
472 | minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With | |
473 | -mkernel-backchain the minimum size drops to 16 byte on 31 bit | |
474 | and 24 byte on 64 bit. | |
475 | ||
476 | Say Y if you are unsure. | |
477 | ||
1da177e4 | 478 | config CHECK_STACK |
6f9a3c33 MS |
479 | def_bool y |
480 | prompt "Detect kernel stack overflow" | |
1da177e4 LT |
481 | help |
482 | This option enables the compiler option -mstack-guard and | |
483 | -mstack-size if they are available. If the compiler supports them | |
484 | it will emit additional code to each function prolog to trigger | |
485 | an illegal operation if the kernel stack is about to overflow. | |
486 | ||
487 | Say N if you are unsure. | |
488 | ||
489 | config STACK_GUARD | |
490 | int "Size of the guard area (128-1024)" | |
491 | range 128 1024 | |
492 | depends on CHECK_STACK | |
493 | default "256" | |
494 | help | |
495 | This allows you to specify the size of the guard area at the lower | |
496 | end of the kernel stack. If the kernel stack points into the guard | |
497 | area on function entry an illegal operation is triggered. The size | |
498 | needs to be a power of 2. Please keep in mind that the size of an | |
499 | interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit. | |
500 | The minimum size for the stack guard should be 256 for 31 bit and | |
501 | 512 for 64 bit. | |
502 | ||
2c190da4 | 503 | config WARN_DYNAMIC_STACK |
6f9a3c33 | 504 | def_bool n |
2c190da4 | 505 | prompt "Emit compiler warnings for function with dynamic stack usage" |
1da177e4 | 506 | help |
2c190da4 JG |
507 | This option enables the compiler option -mwarn-dynamicstack. If the |
508 | compiler supports this options generates warnings for functions | |
509 | that dynamically allocate stack space using alloca. | |
1da177e4 LT |
510 | |
511 | Say N if you are unsure. | |
512 | ||
843c48fd | 513 | endmenu |
3f22ab27 | 514 | |
843c48fd | 515 | menu "I/O subsystem" |
1da177e4 | 516 | |
1da177e4 | 517 | config QDIO |
6f9a3c33 MS |
518 | def_tristate y |
519 | prompt "QDIO support" | |
1da177e4 | 520 | ---help--- |
8129ee16 | 521 | This driver provides the Queued Direct I/O base support for |
efca13bc | 522 | IBM System z. |
1da177e4 LT |
523 | |
524 | To compile this driver as a module, choose M here: the | |
525 | module will be called qdio. | |
526 | ||
527 | If unsure, say Y. | |
528 | ||
c8717a3d JG |
529 | menuconfig PCI |
530 | bool "PCI support" | |
c8717a3d | 531 | depends on 64BIT |
90114d65 | 532 | select HAVE_DMA_ATTRS |
c8717a3d JG |
533 | select PCI_MSI |
534 | help | |
535 | Enable PCI support. | |
536 | ||
537 | if PCI | |
538 | ||
539 | config PCI_NR_FUNCTIONS | |
540 | int "Maximum number of PCI functions (1-4096)" | |
541 | range 1 4096 | |
542 | default "64" | |
543 | help | |
544 | This allows you to specify the maximum number of PCI functions which | |
545 | this kernel will support. | |
546 | ||
1f44a225 MS |
547 | config PCI_NR_MSI |
548 | int "Maximum number of MSI interrupts (64-32768)" | |
549 | range 64 32768 | |
550 | default "256" | |
551 | help | |
552 | This defines the number of virtual interrupts the kernel will | |
553 | provide for MSI interrupts. If you configure your system to have | |
554 | too few drivers will fail to allocate MSI interrupts for all | |
555 | PCI devices. | |
556 | ||
c8717a3d JG |
557 | source "drivers/pci/Kconfig" |
558 | source "drivers/pci/pcie/Kconfig" | |
559 | source "drivers/pci/hotplug/Kconfig" | |
560 | ||
561 | endif # PCI | |
562 | ||
563 | config PCI_DOMAINS | |
564 | def_bool PCI | |
565 | ||
566 | config HAS_IOMEM | |
567 | def_bool PCI | |
568 | ||
569 | config IOMMU_HELPER | |
570 | def_bool PCI | |
571 | ||
572 | config HAS_DMA | |
573 | def_bool PCI | |
574 | select HAVE_DMA_API_DEBUG | |
575 | ||
576 | config NEED_SG_DMA_LENGTH | |
577 | def_bool PCI | |
578 | ||
91630032 JG |
579 | config NEED_DMA_MAP_STATE |
580 | def_bool PCI | |
581 | ||
9d92a7e1 | 582 | config CHSC_SCH |
d9c11b1e | 583 | def_tristate m |
6f9a3c33 | 584 | prompt "Support for CHSC subchannels" |
9d92a7e1 CH |
585 | help |
586 | This driver allows usage of CHSC subchannels. A CHSC subchannel | |
587 | is usually present on LPAR only. | |
588 | The driver creates a device /dev/chsc, which may be used to | |
589 | obtain I/O configuration information about the machine and | |
590 | to issue asynchronous chsc commands (DANGEROUS). | |
591 | You will usually only want to use this interface on a special | |
592 | LPAR designated for system management. | |
593 | ||
594 | To compile this driver as a module, choose M here: the | |
595 | module will be called chsc_sch. | |
596 | ||
597 | If unsure, say N. | |
598 | ||
1d1c8f78 SO |
599 | config SCM_BUS |
600 | def_bool y | |
601 | depends on 64BIT | |
602 | prompt "SCM bus driver" | |
603 | help | |
604 | Bus driver for Storage Class Memory. | |
605 | ||
eadb86ab SO |
606 | config EADM_SCH |
607 | def_tristate m | |
608 | prompt "Support for EADM subchannels" | |
609 | depends on SCM_BUS | |
610 | help | |
611 | This driver allows usage of EADM subchannels. EADM subchannels act | |
612 | as a communication vehicle for SCM increments. | |
613 | ||
614 | To compile this driver as a module, choose M here: the | |
615 | module will be called eadm_sch. | |
616 | ||
843c48fd JG |
617 | endmenu |
618 | ||
619 | menu "Dump support" | |
620 | ||
621 | config CRASH_DUMP | |
622 | bool "kernel crash dumps" | |
623 | depends on 64BIT && SMP | |
624 | select KEXEC | |
625 | help | |
626 | Generate crash dump after being started by kexec. | |
627 | Crash dump kernels are loaded in the main kernel with kexec-tools | |
628 | into a specially reserved region and then later executed after | |
629 | a crash by kdump/kexec. | |
843c48fd | 630 | Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this. |
bf28a597 MH |
631 | This option also enables s390 zfcpdump. |
632 | See also <file:Documentation/s390/zfcpdump.txt> | |
843c48fd JG |
633 | |
634 | endmenu | |
635 | ||
636 | menu "Executable file formats / Emulations" | |
1da177e4 | 637 | |
1da177e4 LT |
638 | source "fs/Kconfig.binfmt" |
639 | ||
843c48fd JG |
640 | config SECCOMP |
641 | def_bool y | |
642 | prompt "Enable seccomp to safely compute untrusted bytecode" | |
643 | depends on PROC_FS | |
644 | help | |
645 | This kernel feature is useful for number crunching applications | |
646 | that may need to compute untrusted bytecode during their | |
647 | execution. By using pipes or other transports made available to | |
648 | the process as file descriptors supporting the read/write | |
649 | syscalls, it's possible to isolate those applications in | |
650 | their own address space using seccomp. Once seccomp is | |
651 | enabled via /proc/<pid>/seccomp, it cannot be disabled | |
652 | and the task is only allowed to execute a few safe syscalls | |
653 | defined by each seccomp mode. | |
654 | ||
655 | If unsure, say Y. | |
656 | ||
657 | endmenu | |
658 | ||
659 | menu "Power Management" | |
660 | ||
661 | config ARCH_HIBERNATION_POSSIBLE | |
662 | def_bool y if 64BIT | |
663 | ||
664 | source "kernel/power/Kconfig" | |
665 | ||
666 | endmenu | |
667 | ||
668 | source "net/Kconfig" | |
669 | ||
670 | config PCMCIA | |
671 | def_bool n | |
672 | ||
673 | config CCW | |
674 | def_bool y | |
675 | ||
676 | source "drivers/Kconfig" | |
677 | ||
678 | source "fs/Kconfig" | |
679 | ||
680 | source "arch/s390/Kconfig.debug" | |
681 | ||
682 | source "security/Kconfig" | |
683 | ||
684 | source "crypto/Kconfig" | |
685 | ||
686 | source "lib/Kconfig" | |
687 | ||
688 | menu "Virtualization" | |
684de39b | 689 | |
1da177e4 | 690 | config PFAULT |
6f9a3c33 MS |
691 | def_bool y |
692 | prompt "Pseudo page fault support" | |
1da177e4 LT |
693 | help |
694 | Select this option, if you want to use PFAULT pseudo page fault | |
695 | handling under VM. If running native or in LPAR, this option | |
696 | has no effect. If your VM does not support PFAULT, PAGEEX | |
697 | pseudo page fault handling will be used. | |
698 | Note that VM 4.2 supports PFAULT but has a bug in its | |
699 | implementation that causes some problems. | |
700 | Everybody who wants to run Linux under VM != VM4.2 should select | |
701 | this option. | |
702 | ||
703 | config SHARED_KERNEL | |
0eccc783 HC |
704 | bool "VM shared kernel support" |
705 | depends on !JUMP_LABEL | |
1da177e4 LT |
706 | help |
707 | Select this option, if you want to share the text segment of the | |
708 | Linux kernel between different VM guests. This reduces memory | |
709 | usage with lots of guests but greatly increases kernel size. | |
9c9c1761 HC |
710 | Also if a kernel was IPL'ed from a shared segment the kexec system |
711 | call will not work. | |
1da177e4 LT |
712 | You should only select this option if you know what you are |
713 | doing and want to exploit this feature. | |
714 | ||
715 | config CMM | |
6f9a3c33 MS |
716 | def_tristate n |
717 | prompt "Cooperative memory management" | |
1da177e4 LT |
718 | help |
719 | Select this option, if you want to enable the kernel interface | |
720 | to reduce the memory size of the system. This is accomplished | |
721 | by allocating pages of memory and put them "on hold". This only | |
722 | makes sense for a system running under VM where the unused pages | |
723 | will be reused by VM for other guest systems. The interface | |
724 | allows an external monitor to balance memory of many systems. | |
725 | Everybody who wants to run Linux under VM should select this | |
726 | option. | |
727 | ||
1da177e4 | 728 | config CMM_IUCV |
6f9a3c33 MS |
729 | def_bool y |
730 | prompt "IUCV special message interface to cooperative memory management" | |
1da177e4 LT |
731 | depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV) |
732 | help | |
733 | Select this option to enable the special message interface to | |
734 | the cooperative memory management. | |
735 | ||
1da177e4 | 736 | config APPLDATA_BASE |
6f9a3c33 MS |
737 | def_bool n |
738 | prompt "Linux - VM Monitor Stream, base infrastructure" | |
c185b783 | 739 | depends on PROC_FS |
1da177e4 LT |
740 | help |
741 | This provides a kernel interface for creating and updating z/VM APPLDATA | |
742 | monitor records. The monitor records are updated at certain time | |
743 | intervals, once the timer is started. | |
744 | Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer, | |
745 | i.e. enables or disables monitoring on the Linux side. | |
746 | A custom interval value (in seconds) can be written to | |
747 | /proc/appldata/interval. | |
748 | ||
749 | Defaults are 60 seconds interval and timer off. | |
750 | The /proc entries can also be read from, showing the current settings. | |
751 | ||
752 | config APPLDATA_MEM | |
6f9a3c33 MS |
753 | def_tristate m |
754 | prompt "Monitor memory management statistics" | |
62fb2ba3 | 755 | depends on APPLDATA_BASE && VM_EVENT_COUNTERS |
1da177e4 LT |
756 | help |
757 | This provides memory management related data to the Linux - VM Monitor | |
758 | Stream, like paging/swapping rate, memory utilisation, etc. | |
759 | Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM | |
760 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
761 | on the z/VM side. | |
762 | ||
763 | Default is disabled. | |
764 | The /proc entry can also be read from, showing the current settings. | |
765 | ||
766 | This can also be compiled as a module, which will be called | |
767 | appldata_mem.o. | |
768 | ||
769 | config APPLDATA_OS | |
6f9a3c33 MS |
770 | def_tristate m |
771 | prompt "Monitor OS statistics" | |
1da177e4 LT |
772 | depends on APPLDATA_BASE |
773 | help | |
774 | This provides OS related data to the Linux - VM Monitor Stream, like | |
775 | CPU utilisation, etc. | |
776 | Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM | |
777 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
778 | on the z/VM side. | |
779 | ||
780 | Default is disabled. | |
781 | This can also be compiled as a module, which will be called | |
782 | appldata_os.o. | |
783 | ||
784 | config APPLDATA_NET_SUM | |
6f9a3c33 MS |
785 | def_tristate m |
786 | prompt "Monitor overall network statistics" | |
70193af9 | 787 | depends on APPLDATA_BASE && NET |
1da177e4 LT |
788 | help |
789 | This provides network related data to the Linux - VM Monitor Stream, | |
790 | currently there is only a total sum of network I/O statistics, no | |
791 | per-interface data. | |
792 | Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM | |
793 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
794 | on the z/VM side. | |
795 | ||
796 | Default is disabled. | |
797 | This can also be compiled as a module, which will be called | |
798 | appldata_net_sum.o. | |
799 | ||
24bbb1fa | 800 | config S390_HYPFS_FS |
6f9a3c33 MS |
801 | def_bool y |
802 | prompt "s390 hypervisor file system support" | |
24bbb1fa | 803 | select SYS_HYPERVISOR |
24bbb1fa MH |
804 | help |
805 | This is a virtual file system intended to provide accounting | |
806 | information in an s390 hypervisor environment. | |
807 | ||
843c48fd | 808 | source "arch/s390/kvm/Kconfig" |
411ed322 | 809 | |
fa587743 | 810 | config S390_GUEST |
6f9a3c33 | 811 | def_bool y |
510cf5a6 KC |
812 | prompt "s390 support for virtio devices" |
813 | depends on 64BIT | |
79b6f7fb | 814 | select TTY |
80629b0b | 815 | select VIRTUALIZATION |
fa587743 | 816 | select VIRTIO |
faeba830 | 817 | select VIRTIO_CONSOLE |
fa587743 | 818 | help |
bdd1fc27 CH |
819 | Enabling this option adds support for virtio based paravirtual device |
820 | drivers on s390. | |
1da177e4 | 821 | |
20766c08 | 822 | Select this option if you want to run the kernel as a guest under |
bdd1fc27 | 823 | the KVM hypervisor. |
155af2f9 HJP |
824 | |
825 | endmenu |