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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 |
2b68f6ca | 68 | select ARCH_HAS_ELF_RANDOMIZE |
957e3fac | 69 | select ARCH_HAS_GCOV_PROFILE_ALL |
47523c98 | 70 | select ARCH_HAS_SG_CHAIN |
0e0d04a8 | 71 | select ARCH_HAVE_NMI_SAFE_CMPXCHG |
6beb0009 TG |
72 | select ARCH_INLINE_READ_LOCK |
73 | select ARCH_INLINE_READ_LOCK_BH | |
74 | select ARCH_INLINE_READ_LOCK_IRQ | |
75 | select ARCH_INLINE_READ_LOCK_IRQSAVE | |
0e0d04a8 | 76 | select ARCH_INLINE_READ_TRYLOCK |
6beb0009 TG |
77 | select ARCH_INLINE_READ_UNLOCK |
78 | select ARCH_INLINE_READ_UNLOCK_BH | |
79 | select ARCH_INLINE_READ_UNLOCK_IRQ | |
80 | select ARCH_INLINE_READ_UNLOCK_IRQRESTORE | |
0e0d04a8 HC |
81 | select ARCH_INLINE_SPIN_LOCK |
82 | select ARCH_INLINE_SPIN_LOCK_BH | |
83 | select ARCH_INLINE_SPIN_LOCK_IRQ | |
84 | select ARCH_INLINE_SPIN_LOCK_IRQSAVE | |
85 | select ARCH_INLINE_SPIN_TRYLOCK | |
86 | select ARCH_INLINE_SPIN_TRYLOCK_BH | |
87 | select ARCH_INLINE_SPIN_UNLOCK | |
88 | select ARCH_INLINE_SPIN_UNLOCK_BH | |
89 | select ARCH_INLINE_SPIN_UNLOCK_IRQ | |
90 | select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE | |
6beb0009 TG |
91 | select ARCH_INLINE_WRITE_LOCK |
92 | select ARCH_INLINE_WRITE_LOCK_BH | |
93 | select ARCH_INLINE_WRITE_LOCK_IRQ | |
94 | select ARCH_INLINE_WRITE_LOCK_IRQSAVE | |
0e0d04a8 | 95 | select ARCH_INLINE_WRITE_TRYLOCK |
6beb0009 TG |
96 | select ARCH_INLINE_WRITE_UNLOCK |
97 | select ARCH_INLINE_WRITE_UNLOCK_BH | |
98 | select ARCH_INLINE_WRITE_UNLOCK_IRQ | |
99 | select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE | |
0e0d04a8 | 100 | select ARCH_SAVE_PAGE_KEYS if HIBERNATION |
36e7fdaa | 101 | select ARCH_SUPPORTS_ATOMIC_RMW |
efc1d23b | 102 | select ARCH_USE_CMPXCHG_LOCKREF |
c1d7e01d | 103 | select ARCH_WANT_IPC_PARSE_VERSION |
0e0d04a8 HC |
104 | select BUILDTIME_EXTABLE_SORT |
105 | select CLONE_BACKWARDS2 | |
5d6a0163 | 106 | select DYNAMIC_FTRACE if FUNCTION_TRACER |
0e0d04a8 HC |
107 | select GENERIC_CLOCKEVENTS |
108 | select GENERIC_CPU_DEVICES if !SMP | |
746479cd | 109 | select GENERIC_FIND_FIRST_BIT |
e80e7813 | 110 | select GENERIC_SMP_IDLE_THREAD |
79c74ecb | 111 | select GENERIC_TIME_VSYSCALL |
0e0d04a8 | 112 | select HAVE_ALIGNED_STRUCT_PAGE if SLUB |
7a017721 | 113 | select HAVE_ARCH_AUDITSYSCALL |
0e0d04a8 | 114 | select HAVE_ARCH_JUMP_LABEL if !MARCH_G5 |
c63cb468 | 115 | select HAVE_ARCH_SECCOMP_FILTER |
0e0d04a8 HC |
116 | select HAVE_ARCH_TRACEHOOK |
117 | select HAVE_ARCH_TRANSPARENT_HUGEPAGE if 64BIT | |
118 | select HAVE_BPF_JIT if 64BIT && PACK_STACK | |
119 | select HAVE_CMPXCHG_DOUBLE | |
120 | select HAVE_CMPXCHG_LOCAL | |
0e0d04a8 | 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 | |
c81956c9 KS |
159 | config PGTABLE_LEVELS |
160 | int | |
161 | default 4 if 64BIT | |
162 | default 2 | |
163 | ||
1da177e4 LT |
164 | source "init/Kconfig" |
165 | ||
dc52ddc0 MH |
166 | source "kernel/Kconfig.freezer" |
167 | ||
843c48fd JG |
168 | menu "Processor type and features" |
169 | ||
170 | config HAVE_MARCH_Z900_FEATURES | |
171 | def_bool n | |
172 | ||
173 | config HAVE_MARCH_Z990_FEATURES | |
174 | def_bool n | |
175 | select HAVE_MARCH_Z900_FEATURES | |
176 | ||
177 | config HAVE_MARCH_Z9_109_FEATURES | |
178 | def_bool n | |
179 | select HAVE_MARCH_Z990_FEATURES | |
180 | ||
181 | config HAVE_MARCH_Z10_FEATURES | |
182 | def_bool n | |
183 | select HAVE_MARCH_Z9_109_FEATURES | |
184 | ||
185 | config HAVE_MARCH_Z196_FEATURES | |
186 | def_bool n | |
187 | select HAVE_MARCH_Z10_FEATURES | |
188 | ||
991c1505 HC |
189 | config HAVE_MARCH_ZEC12_FEATURES |
190 | def_bool n | |
191 | select HAVE_MARCH_Z196_FEATURES | |
192 | ||
f8b2dcbd MS |
193 | config HAVE_MARCH_Z13_FEATURES |
194 | def_bool n | |
195 | select HAVE_MARCH_ZEC12_FEATURES | |
196 | ||
843c48fd JG |
197 | choice |
198 | prompt "Processor type" | |
199 | default MARCH_G5 | |
200 | ||
201 | config MARCH_G5 | |
202 | bool "System/390 model G5 and G6" | |
203 | depends on !64BIT | |
204 | help | |
205 | Select this to build a 31 bit kernel that works | |
206 | on all ESA/390 and z/Architecture machines. | |
1da177e4 | 207 | |
843c48fd JG |
208 | config MARCH_Z900 |
209 | bool "IBM zSeries model z800 and z900" | |
210 | select HAVE_MARCH_Z900_FEATURES if 64BIT | |
211 | help | |
212 | Select this to enable optimizations for model z800/z900 (2064 and | |
213 | 2066 series). This will enable some optimizations that are not | |
214 | available on older ESA/390 (31 Bit) only CPUs. | |
215 | ||
216 | config MARCH_Z990 | |
217 | bool "IBM zSeries model z890 and z990" | |
218 | select HAVE_MARCH_Z990_FEATURES if 64BIT | |
219 | help | |
220 | Select this to enable optimizations for model z890/z990 (2084 and | |
221 | 2086 series). The kernel will be slightly faster but will not work | |
222 | on older machines. | |
223 | ||
224 | config MARCH_Z9_109 | |
225 | bool "IBM System z9" | |
226 | select HAVE_MARCH_Z9_109_FEATURES if 64BIT | |
227 | help | |
228 | Select this to enable optimizations for IBM System z9 (2094 and | |
229 | 2096 series). The kernel will be slightly faster but will not work | |
230 | on older machines. | |
231 | ||
232 | config MARCH_Z10 | |
233 | bool "IBM System z10" | |
234 | select HAVE_MARCH_Z10_FEATURES if 64BIT | |
235 | help | |
236 | Select this to enable optimizations for IBM System z10 (2097 and | |
237 | 2098 series). The kernel will be slightly faster but will not work | |
238 | on older machines. | |
239 | ||
240 | config MARCH_Z196 | |
241 | bool "IBM zEnterprise 114 and 196" | |
242 | select HAVE_MARCH_Z196_FEATURES if 64BIT | |
243 | help | |
244 | Select this to enable optimizations for IBM zEnterprise 114 and 196 | |
245 | (2818 and 2817 series). The kernel will be slightly faster but will | |
246 | not work on older machines. | |
1da177e4 | 247 | |
991c1505 | 248 | config MARCH_ZEC12 |
59471227 | 249 | bool "IBM zBC12 and zEC12" |
991c1505 HC |
250 | select HAVE_MARCH_ZEC12_FEATURES if 64BIT |
251 | help | |
59471227 HC |
252 | Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and |
253 | 2827 series). The kernel will be slightly faster but will not work on | |
254 | older machines. | |
991c1505 | 255 | |
f8b2dcbd MS |
256 | config MARCH_Z13 |
257 | bool "IBM z13" | |
258 | select HAVE_MARCH_Z13_FEATURES if 64BIT | |
259 | help | |
260 | Select this to enable optimizations for IBM z13 (2964 series). | |
261 | The kernel will be slightly faster but will not work on older | |
262 | machines. | |
263 | ||
843c48fd | 264 | endchoice |
1da177e4 | 265 | |
1db9e051 HC |
266 | config MARCH_G5_TUNE |
267 | def_bool TUNE_G5 || MARCH_G5 && TUNE_DEFAULT | |
268 | ||
269 | config MARCH_Z900_TUNE | |
270 | def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT | |
271 | ||
272 | config MARCH_Z990_TUNE | |
273 | def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT | |
274 | ||
275 | config MARCH_Z9_109_TUNE | |
276 | def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT | |
277 | ||
278 | config MARCH_Z10_TUNE | |
279 | def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT | |
280 | ||
281 | config MARCH_Z196_TUNE | |
282 | def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT | |
283 | ||
284 | config MARCH_ZEC12_TUNE | |
285 | def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT | |
286 | ||
f8b2dcbd MS |
287 | config MARCH_Z13_TUNE |
288 | def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT | |
289 | ||
1db9e051 HC |
290 | choice |
291 | prompt "Tune code generation" | |
292 | default TUNE_DEFAULT | |
293 | help | |
294 | Cause the compiler to tune (-mtune) the generated code for a machine. | |
295 | This will make the code run faster on the selected machine but | |
296 | somewhat slower on other machines. | |
297 | This option only changes how the compiler emits instructions, not the | |
298 | selection of instructions itself, so the resulting kernel will run on | |
299 | all other machines. | |
300 | ||
301 | config TUNE_DEFAULT | |
302 | bool "Default" | |
303 | help | |
304 | Tune the generated code for the target processor for which the kernel | |
305 | will be compiled. | |
306 | ||
307 | config TUNE_G5 | |
308 | bool "System/390 model G5 and G6" | |
309 | ||
310 | config TUNE_Z900 | |
311 | bool "IBM zSeries model z800 and z900" | |
312 | ||
313 | config TUNE_Z990 | |
314 | bool "IBM zSeries model z890 and z990" | |
315 | ||
316 | config TUNE_Z9_109 | |
317 | bool "IBM System z9" | |
318 | ||
319 | config TUNE_Z10 | |
320 | bool "IBM System z10" | |
321 | ||
322 | config TUNE_Z196 | |
323 | bool "IBM zEnterprise 114 and 196" | |
324 | ||
325 | config TUNE_ZEC12 | |
326 | bool "IBM zBC12 and zEC12" | |
327 | ||
f8b2dcbd MS |
328 | config TUNE_Z13 |
329 | bool "IBM z13" | |
330 | ||
1db9e051 HC |
331 | endchoice |
332 | ||
347a8dc3 | 333 | config 64BIT |
6f9a3c33 MS |
334 | def_bool y |
335 | prompt "64 bit kernel" | |
1da177e4 | 336 | help |
db81a23d | 337 | Select this option if you have an IBM z/Architecture machine |
1da177e4 LT |
338 | and want to use the 64 bit addressing mode. |
339 | ||
d9f7a745 | 340 | config 32BIT |
6f9a3c33 | 341 | def_bool y if !64BIT |
d9f7a745 | 342 | |
843c48fd JG |
343 | config COMPAT |
344 | def_bool y | |
345 | prompt "Kernel support for 31 bit emulation" | |
346 | depends on 64BIT | |
347 | select COMPAT_BINFMT_ELF if BINFMT_ELF | |
348 | select ARCH_WANT_OLD_COMPAT_IPC | |
7eddd99c | 349 | select COMPAT_OLD_SIGACTION |
843c48fd JG |
350 | help |
351 | Select this option if you want to enable your system kernel to | |
352 | handle system-calls from ELF binaries for 31 bit ESA. This option | |
353 | (and some other stuff like libraries and such) is needed for | |
354 | executing 31 bit applications. It is safe to say "Y". | |
355 | ||
356 | config SYSVIPC_COMPAT | |
357 | def_bool y if COMPAT && SYSVIPC | |
358 | ||
359 | config KEYS_COMPAT | |
360 | def_bool y if COMPAT && KEYS | |
361 | ||
1da177e4 | 362 | config SMP |
6f9a3c33 MS |
363 | def_bool y |
364 | prompt "Symmetric multi-processing support" | |
1da177e4 LT |
365 | ---help--- |
366 | This enables support for systems with more than one CPU. If you have | |
367 | a system with only one CPU, like most personal computers, say N. If | |
368 | you have a system with more than one CPU, say Y. | |
369 | ||
4a474157 | 370 | If you say N here, the kernel will run on uni- and multiprocessor |
1da177e4 LT |
371 | machines, but will use only one CPU of a multiprocessor machine. If |
372 | you say Y here, the kernel will run on many, but not all, | |
4a474157 | 373 | uniprocessor machines. On a uniprocessor machine, the kernel |
1da177e4 LT |
374 | will run faster if you say N here. |
375 | ||
03502faa AB |
376 | See also the SMP-HOWTO available at |
377 | <http://www.tldp.org/docs.html#howto>. | |
1da177e4 LT |
378 | |
379 | Even if you don't know what to do here, say Y. | |
380 | ||
381 | config NR_CPUS | |
5c75a0da HC |
382 | int "Maximum number of CPUs (2-512)" |
383 | range 2 512 | |
1da177e4 | 384 | depends on SMP |
057c5cb3 HC |
385 | default "32" if !64BIT |
386 | default "64" if 64BIT | |
1da177e4 LT |
387 | help |
388 | This allows you to specify the maximum number of CPUs which this | |
5c75a0da | 389 | kernel will support. The maximum supported value is 512 and the |
1da177e4 LT |
390 | minimum value which makes sense is 2. |
391 | ||
392 | This is purely to save memory - each supported CPU adds | |
393 | approximately sixteen kilobytes to the kernel image. | |
394 | ||
395 | config HOTPLUG_CPU | |
6f9a3c33 MS |
396 | def_bool y |
397 | prompt "Support for hot-pluggable CPUs" | |
1da177e4 | 398 | depends on SMP |
1da177e4 LT |
399 | help |
400 | Say Y here to be able to turn CPUs off and on. CPUs | |
401 | can be controlled through /sys/devices/system/cpu/cpu#. | |
402 | Say N if you want to disable CPU hotplug. | |
403 | ||
10ad34bc MS |
404 | config SCHED_SMT |
405 | def_bool n | |
406 | ||
8d11e021 | 407 | config SCHED_MC |
83a24e32 | 408 | def_bool n |
8d11e021 | 409 | |
4cb14bc8 | 410 | config SCHED_BOOK |
10ad34bc MS |
411 | def_bool n |
412 | ||
413 | config SCHED_TOPOLOGY | |
6f9a3c33 | 414 | def_bool y |
10ad34bc | 415 | prompt "Topology scheduler support" |
83a24e32 | 416 | depends on SMP |
10ad34bc | 417 | select SCHED_SMT |
83a24e32 | 418 | select SCHED_MC |
10ad34bc | 419 | select SCHED_BOOK |
4cb14bc8 | 420 | help |
10ad34bc MS |
421 | Topology scheduler support improves the CPU scheduler's decision |
422 | making when dealing with machines that have multi-threading, | |
423 | multiple cores or multiple books. | |
4cb14bc8 | 424 | |
843c48fd JG |
425 | source kernel/Kconfig.preempt |
426 | ||
1da177e4 | 427 | config MATHEMU |
6f9a3c33 MS |
428 | def_bool y |
429 | prompt "IEEE FPU emulation" | |
1da177e4 LT |
430 | depends on MARCH_G5 |
431 | help | |
432 | This option is required for IEEE compliant floating point arithmetic | |
db81a23d | 433 | on older ESA/390 machines. Say Y unless you know your machine doesn't |
1da177e4 LT |
434 | need this. |
435 | ||
843c48fd | 436 | source kernel/Kconfig.hz |
1da177e4 | 437 | |
843c48fd | 438 | endmenu |
1da177e4 | 439 | |
843c48fd | 440 | menu "Memory setup" |
1d057720 | 441 | |
843c48fd | 442 | config ARCH_SPARSEMEM_ENABLE |
6f9a3c33 | 443 | def_bool y |
843c48fd JG |
444 | select SPARSEMEM_VMEMMAP_ENABLE |
445 | select SPARSEMEM_VMEMMAP | |
446 | select SPARSEMEM_STATIC if !64BIT | |
e65e1fc2 | 447 | |
843c48fd JG |
448 | config ARCH_SPARSEMEM_DEFAULT |
449 | def_bool y | |
1da177e4 | 450 | |
843c48fd JG |
451 | config ARCH_SELECT_MEMORY_MODEL |
452 | def_bool y | |
1da177e4 | 453 | |
843c48fd JG |
454 | config ARCH_ENABLE_MEMORY_HOTPLUG |
455 | def_bool y if SPARSEMEM | |
0efa4703 | 456 | |
843c48fd JG |
457 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
458 | def_bool y | |
e37f50e1 | 459 | |
ec66ad66 MS |
460 | config ARCH_ENABLE_SPLIT_PMD_PTLOCK |
461 | def_bool y | |
462 | depends on 64BIT | |
463 | ||
843c48fd JG |
464 | config FORCE_MAX_ZONEORDER |
465 | int | |
466 | default "9" | |
f861e405 | 467 | |
843c48fd | 468 | source "mm/Kconfig" |
1da177e4 LT |
469 | |
470 | config PACK_STACK | |
6f9a3c33 MS |
471 | def_bool y |
472 | prompt "Pack kernel stack" | |
1da177e4 LT |
473 | help |
474 | This option enables the compiler option -mkernel-backchain if it | |
475 | is available. If the option is available the compiler supports | |
476 | the new stack layout which dramatically reduces the minimum stack | |
477 | frame size. With an old compiler a non-leaf function needs a | |
478 | minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With | |
479 | -mkernel-backchain the minimum size drops to 16 byte on 31 bit | |
480 | and 24 byte on 64 bit. | |
481 | ||
482 | Say Y if you are unsure. | |
483 | ||
1da177e4 | 484 | config CHECK_STACK |
6f9a3c33 MS |
485 | def_bool y |
486 | prompt "Detect kernel stack overflow" | |
1da177e4 LT |
487 | help |
488 | This option enables the compiler option -mstack-guard and | |
489 | -mstack-size if they are available. If the compiler supports them | |
490 | it will emit additional code to each function prolog to trigger | |
491 | an illegal operation if the kernel stack is about to overflow. | |
492 | ||
493 | Say N if you are unsure. | |
494 | ||
495 | config STACK_GUARD | |
496 | int "Size of the guard area (128-1024)" | |
497 | range 128 1024 | |
498 | depends on CHECK_STACK | |
499 | default "256" | |
500 | help | |
501 | This allows you to specify the size of the guard area at the lower | |
502 | end of the kernel stack. If the kernel stack points into the guard | |
503 | area on function entry an illegal operation is triggered. The size | |
504 | needs to be a power of 2. Please keep in mind that the size of an | |
505 | interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit. | |
506 | The minimum size for the stack guard should be 256 for 31 bit and | |
507 | 512 for 64 bit. | |
508 | ||
2c190da4 | 509 | config WARN_DYNAMIC_STACK |
6f9a3c33 | 510 | def_bool n |
2c190da4 | 511 | prompt "Emit compiler warnings for function with dynamic stack usage" |
1da177e4 | 512 | help |
2c190da4 JG |
513 | This option enables the compiler option -mwarn-dynamicstack. If the |
514 | compiler supports this options generates warnings for functions | |
515 | that dynamically allocate stack space using alloca. | |
1da177e4 LT |
516 | |
517 | Say N if you are unsure. | |
518 | ||
843c48fd | 519 | endmenu |
3f22ab27 | 520 | |
843c48fd | 521 | menu "I/O subsystem" |
1da177e4 | 522 | |
1da177e4 | 523 | config QDIO |
6f9a3c33 MS |
524 | def_tristate y |
525 | prompt "QDIO support" | |
1da177e4 | 526 | ---help--- |
8129ee16 | 527 | This driver provides the Queued Direct I/O base support for |
efca13bc | 528 | IBM System z. |
1da177e4 LT |
529 | |
530 | To compile this driver as a module, choose M here: the | |
531 | module will be called qdio. | |
532 | ||
533 | If unsure, say Y. | |
534 | ||
c8717a3d JG |
535 | menuconfig PCI |
536 | bool "PCI support" | |
c8717a3d | 537 | depends on 64BIT |
90114d65 | 538 | select HAVE_DMA_ATTRS |
c8717a3d JG |
539 | select PCI_MSI |
540 | help | |
541 | Enable PCI support. | |
542 | ||
543 | if PCI | |
544 | ||
545 | config PCI_NR_FUNCTIONS | |
546 | int "Maximum number of PCI functions (1-4096)" | |
547 | range 1 4096 | |
548 | default "64" | |
549 | help | |
550 | This allows you to specify the maximum number of PCI functions which | |
551 | this kernel will support. | |
552 | ||
1f44a225 MS |
553 | config PCI_NR_MSI |
554 | int "Maximum number of MSI interrupts (64-32768)" | |
555 | range 64 32768 | |
556 | default "256" | |
557 | help | |
558 | This defines the number of virtual interrupts the kernel will | |
559 | provide for MSI interrupts. If you configure your system to have | |
560 | too few drivers will fail to allocate MSI interrupts for all | |
561 | PCI devices. | |
562 | ||
c8717a3d JG |
563 | source "drivers/pci/Kconfig" |
564 | source "drivers/pci/pcie/Kconfig" | |
565 | source "drivers/pci/hotplug/Kconfig" | |
566 | ||
567 | endif # PCI | |
568 | ||
569 | config PCI_DOMAINS | |
570 | def_bool PCI | |
571 | ||
572 | config HAS_IOMEM | |
573 | def_bool PCI | |
574 | ||
575 | config IOMMU_HELPER | |
576 | def_bool PCI | |
577 | ||
578 | config HAS_DMA | |
579 | def_bool PCI | |
580 | select HAVE_DMA_API_DEBUG | |
581 | ||
582 | config NEED_SG_DMA_LENGTH | |
583 | def_bool PCI | |
584 | ||
91630032 JG |
585 | config NEED_DMA_MAP_STATE |
586 | def_bool PCI | |
587 | ||
9d92a7e1 | 588 | config CHSC_SCH |
d9c11b1e | 589 | def_tristate m |
6f9a3c33 | 590 | prompt "Support for CHSC subchannels" |
9d92a7e1 CH |
591 | help |
592 | This driver allows usage of CHSC subchannels. A CHSC subchannel | |
593 | is usually present on LPAR only. | |
594 | The driver creates a device /dev/chsc, which may be used to | |
595 | obtain I/O configuration information about the machine and | |
596 | to issue asynchronous chsc commands (DANGEROUS). | |
597 | You will usually only want to use this interface on a special | |
598 | LPAR designated for system management. | |
599 | ||
600 | To compile this driver as a module, choose M here: the | |
601 | module will be called chsc_sch. | |
602 | ||
603 | If unsure, say N. | |
604 | ||
1d1c8f78 SO |
605 | config SCM_BUS |
606 | def_bool y | |
607 | depends on 64BIT | |
608 | prompt "SCM bus driver" | |
609 | help | |
610 | Bus driver for Storage Class Memory. | |
611 | ||
eadb86ab SO |
612 | config EADM_SCH |
613 | def_tristate m | |
614 | prompt "Support for EADM subchannels" | |
615 | depends on SCM_BUS | |
616 | help | |
617 | This driver allows usage of EADM subchannels. EADM subchannels act | |
618 | as a communication vehicle for SCM increments. | |
619 | ||
620 | To compile this driver as a module, choose M here: the | |
621 | module will be called eadm_sch. | |
622 | ||
843c48fd JG |
623 | endmenu |
624 | ||
625 | menu "Dump support" | |
626 | ||
627 | config CRASH_DUMP | |
628 | bool "kernel crash dumps" | |
629 | depends on 64BIT && SMP | |
630 | select KEXEC | |
631 | help | |
632 | Generate crash dump after being started by kexec. | |
633 | Crash dump kernels are loaded in the main kernel with kexec-tools | |
634 | into a specially reserved region and then later executed after | |
635 | a crash by kdump/kexec. | |
843c48fd | 636 | Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this. |
bf28a597 MH |
637 | This option also enables s390 zfcpdump. |
638 | See also <file:Documentation/s390/zfcpdump.txt> | |
843c48fd JG |
639 | |
640 | endmenu | |
641 | ||
642 | menu "Executable file formats / Emulations" | |
1da177e4 | 643 | |
1da177e4 LT |
644 | source "fs/Kconfig.binfmt" |
645 | ||
843c48fd JG |
646 | config SECCOMP |
647 | def_bool y | |
648 | prompt "Enable seccomp to safely compute untrusted bytecode" | |
649 | depends on PROC_FS | |
650 | help | |
651 | This kernel feature is useful for number crunching applications | |
652 | that may need to compute untrusted bytecode during their | |
653 | execution. By using pipes or other transports made available to | |
654 | the process as file descriptors supporting the read/write | |
655 | syscalls, it's possible to isolate those applications in | |
656 | their own address space using seccomp. Once seccomp is | |
657 | enabled via /proc/<pid>/seccomp, it cannot be disabled | |
658 | and the task is only allowed to execute a few safe syscalls | |
659 | defined by each seccomp mode. | |
660 | ||
661 | If unsure, say Y. | |
662 | ||
663 | endmenu | |
664 | ||
665 | menu "Power Management" | |
666 | ||
667 | config ARCH_HIBERNATION_POSSIBLE | |
668 | def_bool y if 64BIT | |
669 | ||
670 | source "kernel/power/Kconfig" | |
671 | ||
672 | endmenu | |
673 | ||
674 | source "net/Kconfig" | |
675 | ||
676 | config PCMCIA | |
677 | def_bool n | |
678 | ||
679 | config CCW | |
680 | def_bool y | |
681 | ||
682 | source "drivers/Kconfig" | |
683 | ||
684 | source "fs/Kconfig" | |
685 | ||
686 | source "arch/s390/Kconfig.debug" | |
687 | ||
688 | source "security/Kconfig" | |
689 | ||
690 | source "crypto/Kconfig" | |
691 | ||
692 | source "lib/Kconfig" | |
693 | ||
694 | menu "Virtualization" | |
684de39b | 695 | |
1da177e4 | 696 | config PFAULT |
6f9a3c33 MS |
697 | def_bool y |
698 | prompt "Pseudo page fault support" | |
1da177e4 LT |
699 | help |
700 | Select this option, if you want to use PFAULT pseudo page fault | |
701 | handling under VM. If running native or in LPAR, this option | |
702 | has no effect. If your VM does not support PFAULT, PAGEEX | |
703 | pseudo page fault handling will be used. | |
704 | Note that VM 4.2 supports PFAULT but has a bug in its | |
705 | implementation that causes some problems. | |
706 | Everybody who wants to run Linux under VM != VM4.2 should select | |
707 | this option. | |
708 | ||
709 | config SHARED_KERNEL | |
0eccc783 HC |
710 | bool "VM shared kernel support" |
711 | depends on !JUMP_LABEL | |
1da177e4 LT |
712 | help |
713 | Select this option, if you want to share the text segment of the | |
714 | Linux kernel between different VM guests. This reduces memory | |
715 | usage with lots of guests but greatly increases kernel size. | |
9c9c1761 HC |
716 | Also if a kernel was IPL'ed from a shared segment the kexec system |
717 | call will not work. | |
1da177e4 LT |
718 | You should only select this option if you know what you are |
719 | doing and want to exploit this feature. | |
720 | ||
721 | config CMM | |
6f9a3c33 MS |
722 | def_tristate n |
723 | prompt "Cooperative memory management" | |
1da177e4 LT |
724 | help |
725 | Select this option, if you want to enable the kernel interface | |
726 | to reduce the memory size of the system. This is accomplished | |
727 | by allocating pages of memory and put them "on hold". This only | |
728 | makes sense for a system running under VM where the unused pages | |
729 | will be reused by VM for other guest systems. The interface | |
730 | allows an external monitor to balance memory of many systems. | |
731 | Everybody who wants to run Linux under VM should select this | |
732 | option. | |
733 | ||
1da177e4 | 734 | config CMM_IUCV |
6f9a3c33 MS |
735 | def_bool y |
736 | prompt "IUCV special message interface to cooperative memory management" | |
1da177e4 LT |
737 | depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV) |
738 | help | |
739 | Select this option to enable the special message interface to | |
740 | the cooperative memory management. | |
741 | ||
1da177e4 | 742 | config APPLDATA_BASE |
6f9a3c33 MS |
743 | def_bool n |
744 | prompt "Linux - VM Monitor Stream, base infrastructure" | |
c185b783 | 745 | depends on PROC_FS |
1da177e4 LT |
746 | help |
747 | This provides a kernel interface for creating and updating z/VM APPLDATA | |
748 | monitor records. The monitor records are updated at certain time | |
749 | intervals, once the timer is started. | |
750 | Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer, | |
751 | i.e. enables or disables monitoring on the Linux side. | |
752 | A custom interval value (in seconds) can be written to | |
753 | /proc/appldata/interval. | |
754 | ||
755 | Defaults are 60 seconds interval and timer off. | |
756 | The /proc entries can also be read from, showing the current settings. | |
757 | ||
758 | config APPLDATA_MEM | |
6f9a3c33 MS |
759 | def_tristate m |
760 | prompt "Monitor memory management statistics" | |
62fb2ba3 | 761 | depends on APPLDATA_BASE && VM_EVENT_COUNTERS |
1da177e4 LT |
762 | help |
763 | This provides memory management related data to the Linux - VM Monitor | |
764 | Stream, like paging/swapping rate, memory utilisation, etc. | |
765 | Writing 1 or 0 to /proc/appldata/memory 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 | The /proc entry can also be read from, showing the current settings. | |
771 | ||
772 | This can also be compiled as a module, which will be called | |
773 | appldata_mem.o. | |
774 | ||
775 | config APPLDATA_OS | |
6f9a3c33 MS |
776 | def_tristate m |
777 | prompt "Monitor OS statistics" | |
1da177e4 LT |
778 | depends on APPLDATA_BASE |
779 | help | |
780 | This provides OS related data to the Linux - VM Monitor Stream, like | |
781 | CPU utilisation, etc. | |
782 | Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM | |
783 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
784 | on the z/VM side. | |
785 | ||
786 | Default is disabled. | |
787 | This can also be compiled as a module, which will be called | |
788 | appldata_os.o. | |
789 | ||
790 | config APPLDATA_NET_SUM | |
6f9a3c33 MS |
791 | def_tristate m |
792 | prompt "Monitor overall network statistics" | |
70193af9 | 793 | depends on APPLDATA_BASE && NET |
1da177e4 LT |
794 | help |
795 | This provides network related data to the Linux - VM Monitor Stream, | |
796 | currently there is only a total sum of network I/O statistics, no | |
797 | per-interface data. | |
798 | Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM | |
799 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
800 | on the z/VM side. | |
801 | ||
802 | Default is disabled. | |
803 | This can also be compiled as a module, which will be called | |
804 | appldata_net_sum.o. | |
805 | ||
24bbb1fa | 806 | config S390_HYPFS_FS |
6f9a3c33 MS |
807 | def_bool y |
808 | prompt "s390 hypervisor file system support" | |
24bbb1fa | 809 | select SYS_HYPERVISOR |
24bbb1fa MH |
810 | help |
811 | This is a virtual file system intended to provide accounting | |
812 | information in an s390 hypervisor environment. | |
813 | ||
843c48fd | 814 | source "arch/s390/kvm/Kconfig" |
411ed322 | 815 | |
fa587743 | 816 | config S390_GUEST |
6f9a3c33 | 817 | def_bool y |
510cf5a6 KC |
818 | prompt "s390 support for virtio devices" |
819 | depends on 64BIT | |
79b6f7fb | 820 | select TTY |
80629b0b | 821 | select VIRTUALIZATION |
fa587743 | 822 | select VIRTIO |
faeba830 | 823 | select VIRTIO_CONSOLE |
fa587743 | 824 | help |
bdd1fc27 CH |
825 | Enabling this option adds support for virtio based paravirtual device |
826 | drivers on s390. | |
1da177e4 | 827 | |
20766c08 | 828 | Select this option if you want to run the kernel as a guest under |
bdd1fc27 | 829 | the KVM hypervisor. |
155af2f9 HJP |
830 | |
831 | endmenu |