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 | 37 | config ARCH_DMA_ADDR_T_64BIT |
5a79859a | 38 | def_bool y |
eca577ef | 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 | 61 | config ARCH_SUPPORTS_UPROBES |
5a79859a | 62 | def_bool y |
2a0a5b22 | 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 |
5a79859a | 114 | select HAVE_ARCH_JUMP_LABEL |
c63cb468 | 115 | select HAVE_ARCH_SECCOMP_FILTER |
0e0d04a8 | 116 | select HAVE_ARCH_TRACEHOOK |
5a79859a | 117 | select HAVE_ARCH_TRANSPARENT_HUGEPAGE |
77a87f0c | 118 | select HAVE_BPF_JIT if PACK_STACK && HAVE_MARCH_Z196_FEATURES |
0e0d04a8 HC |
119 | select HAVE_CMPXCHG_DOUBLE |
120 | select HAVE_CMPXCHG_LOCAL | |
0e0d04a8 | 121 | select HAVE_DEBUG_KMEMLEAK |
5a79859a HC |
122 | select HAVE_DYNAMIC_FTRACE |
123 | select HAVE_DYNAMIC_FTRACE_WITH_REGS | |
0e0d04a8 | 124 | select HAVE_FTRACE_MCOUNT_RECORD |
5a79859a HC |
125 | select HAVE_FUNCTION_GRAPH_TRACER |
126 | select HAVE_FUNCTION_TRACER | |
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 | |
5a79859a | 136 | select HAVE_KVM |
21042d43 | 137 | select HAVE_LIVEPATCH |
0e0d04a8 HC |
138 | select HAVE_MEMBLOCK |
139 | select HAVE_MEMBLOCK_NODE_MAP | |
50be6345 | 140 | select HAVE_MEMBLOCK_PHYS_MAP |
786d35d4 | 141 | select HAVE_MOD_ARCH_SPECIFIC |
0e0d04a8 HC |
142 | select HAVE_OPROFILE |
143 | select HAVE_PERF_EVENTS | |
144 | select HAVE_REGS_AND_STACK_ACCESS_API | |
145 | select HAVE_SYSCALL_TRACEPOINTS | |
0e0d04a8 | 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 | ||
21042d43 JS |
168 | source "kernel/livepatch/Kconfig" |
169 | ||
843c48fd JG |
170 | menu "Processor type and features" |
171 | ||
172 | config HAVE_MARCH_Z900_FEATURES | |
173 | def_bool n | |
174 | ||
175 | config HAVE_MARCH_Z990_FEATURES | |
176 | def_bool n | |
177 | select HAVE_MARCH_Z900_FEATURES | |
178 | ||
179 | config HAVE_MARCH_Z9_109_FEATURES | |
180 | def_bool n | |
181 | select HAVE_MARCH_Z990_FEATURES | |
182 | ||
183 | config HAVE_MARCH_Z10_FEATURES | |
184 | def_bool n | |
185 | select HAVE_MARCH_Z9_109_FEATURES | |
186 | ||
187 | config HAVE_MARCH_Z196_FEATURES | |
188 | def_bool n | |
189 | select HAVE_MARCH_Z10_FEATURES | |
190 | ||
991c1505 HC |
191 | config HAVE_MARCH_ZEC12_FEATURES |
192 | def_bool n | |
193 | select HAVE_MARCH_Z196_FEATURES | |
194 | ||
f8b2dcbd MS |
195 | config HAVE_MARCH_Z13_FEATURES |
196 | def_bool n | |
197 | select HAVE_MARCH_ZEC12_FEATURES | |
198 | ||
843c48fd JG |
199 | choice |
200 | prompt "Processor type" | |
5a79859a | 201 | default MARCH_Z900 |
1da177e4 | 202 | |
843c48fd JG |
203 | config MARCH_Z900 |
204 | bool "IBM zSeries model z800 and z900" | |
5a79859a | 205 | select HAVE_MARCH_Z900_FEATURES |
843c48fd JG |
206 | help |
207 | Select this to enable optimizations for model z800/z900 (2064 and | |
208 | 2066 series). This will enable some optimizations that are not | |
209 | available on older ESA/390 (31 Bit) only CPUs. | |
210 | ||
211 | config MARCH_Z990 | |
212 | bool "IBM zSeries model z890 and z990" | |
5a79859a | 213 | select HAVE_MARCH_Z990_FEATURES |
843c48fd JG |
214 | help |
215 | Select this to enable optimizations for model z890/z990 (2084 and | |
216 | 2086 series). The kernel will be slightly faster but will not work | |
217 | on older machines. | |
218 | ||
219 | config MARCH_Z9_109 | |
220 | bool "IBM System z9" | |
5a79859a | 221 | select HAVE_MARCH_Z9_109_FEATURES |
843c48fd JG |
222 | help |
223 | Select this to enable optimizations for IBM System z9 (2094 and | |
224 | 2096 series). The kernel will be slightly faster but will not work | |
225 | on older machines. | |
226 | ||
227 | config MARCH_Z10 | |
228 | bool "IBM System z10" | |
5a79859a | 229 | select HAVE_MARCH_Z10_FEATURES |
843c48fd JG |
230 | help |
231 | Select this to enable optimizations for IBM System z10 (2097 and | |
232 | 2098 series). The kernel will be slightly faster but will not work | |
233 | on older machines. | |
234 | ||
235 | config MARCH_Z196 | |
236 | bool "IBM zEnterprise 114 and 196" | |
5a79859a | 237 | select HAVE_MARCH_Z196_FEATURES |
843c48fd JG |
238 | help |
239 | Select this to enable optimizations for IBM zEnterprise 114 and 196 | |
240 | (2818 and 2817 series). The kernel will be slightly faster but will | |
241 | not work on older machines. | |
1da177e4 | 242 | |
991c1505 | 243 | config MARCH_ZEC12 |
59471227 | 244 | bool "IBM zBC12 and zEC12" |
5a79859a | 245 | select HAVE_MARCH_ZEC12_FEATURES |
991c1505 | 246 | help |
59471227 HC |
247 | Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and |
248 | 2827 series). The kernel will be slightly faster but will not work on | |
249 | older machines. | |
991c1505 | 250 | |
f8b2dcbd MS |
251 | config MARCH_Z13 |
252 | bool "IBM z13" | |
5a79859a | 253 | select HAVE_MARCH_Z13_FEATURES |
f8b2dcbd MS |
254 | help |
255 | Select this to enable optimizations for IBM z13 (2964 series). | |
256 | The kernel will be slightly faster but will not work on older | |
257 | machines. | |
258 | ||
843c48fd | 259 | endchoice |
1da177e4 | 260 | |
1db9e051 HC |
261 | config MARCH_Z900_TUNE |
262 | def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT | |
263 | ||
264 | config MARCH_Z990_TUNE | |
265 | def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT | |
266 | ||
267 | config MARCH_Z9_109_TUNE | |
268 | def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT | |
269 | ||
270 | config MARCH_Z10_TUNE | |
271 | def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT | |
272 | ||
273 | config MARCH_Z196_TUNE | |
274 | def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT | |
275 | ||
276 | config MARCH_ZEC12_TUNE | |
277 | def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT | |
278 | ||
f8b2dcbd MS |
279 | config MARCH_Z13_TUNE |
280 | def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT | |
281 | ||
1db9e051 HC |
282 | choice |
283 | prompt "Tune code generation" | |
284 | default TUNE_DEFAULT | |
285 | help | |
286 | Cause the compiler to tune (-mtune) the generated code for a machine. | |
287 | This will make the code run faster on the selected machine but | |
288 | somewhat slower on other machines. | |
289 | This option only changes how the compiler emits instructions, not the | |
290 | selection of instructions itself, so the resulting kernel will run on | |
291 | all other machines. | |
292 | ||
293 | config TUNE_DEFAULT | |
294 | bool "Default" | |
295 | help | |
296 | Tune the generated code for the target processor for which the kernel | |
297 | will be compiled. | |
298 | ||
1db9e051 HC |
299 | config TUNE_Z900 |
300 | bool "IBM zSeries model z800 and z900" | |
301 | ||
302 | config TUNE_Z990 | |
303 | bool "IBM zSeries model z890 and z990" | |
304 | ||
305 | config TUNE_Z9_109 | |
306 | bool "IBM System z9" | |
307 | ||
308 | config TUNE_Z10 | |
309 | bool "IBM System z10" | |
310 | ||
311 | config TUNE_Z196 | |
312 | bool "IBM zEnterprise 114 and 196" | |
313 | ||
314 | config TUNE_ZEC12 | |
315 | bool "IBM zBC12 and zEC12" | |
316 | ||
f8b2dcbd MS |
317 | config TUNE_Z13 |
318 | bool "IBM z13" | |
319 | ||
1db9e051 HC |
320 | endchoice |
321 | ||
347a8dc3 | 322 | config 64BIT |
6f9a3c33 | 323 | def_bool y |
d9f7a745 | 324 | |
843c48fd JG |
325 | config COMPAT |
326 | def_bool y | |
327 | prompt "Kernel support for 31 bit emulation" | |
843c48fd JG |
328 | select COMPAT_BINFMT_ELF if BINFMT_ELF |
329 | select ARCH_WANT_OLD_COMPAT_IPC | |
7eddd99c | 330 | select COMPAT_OLD_SIGACTION |
2813893f | 331 | depends on MULTIUSER |
843c48fd JG |
332 | help |
333 | Select this option if you want to enable your system kernel to | |
334 | handle system-calls from ELF binaries for 31 bit ESA. This option | |
335 | (and some other stuff like libraries and such) is needed for | |
336 | executing 31 bit applications. It is safe to say "Y". | |
337 | ||
338 | config SYSVIPC_COMPAT | |
339 | def_bool y if COMPAT && SYSVIPC | |
340 | ||
341 | config KEYS_COMPAT | |
342 | def_bool y if COMPAT && KEYS | |
343 | ||
1da177e4 | 344 | config SMP |
6f9a3c33 MS |
345 | def_bool y |
346 | prompt "Symmetric multi-processing support" | |
1da177e4 LT |
347 | ---help--- |
348 | This enables support for systems with more than one CPU. If you have | |
349 | a system with only one CPU, like most personal computers, say N. If | |
350 | you have a system with more than one CPU, say Y. | |
351 | ||
4a474157 | 352 | If you say N here, the kernel will run on uni- and multiprocessor |
1da177e4 LT |
353 | machines, but will use only one CPU of a multiprocessor machine. If |
354 | you say Y here, the kernel will run on many, but not all, | |
4a474157 | 355 | uniprocessor machines. On a uniprocessor machine, the kernel |
1da177e4 LT |
356 | will run faster if you say N here. |
357 | ||
03502faa AB |
358 | See also the SMP-HOWTO available at |
359 | <http://www.tldp.org/docs.html#howto>. | |
1da177e4 LT |
360 | |
361 | Even if you don't know what to do here, say Y. | |
362 | ||
363 | config NR_CPUS | |
5c75a0da HC |
364 | int "Maximum number of CPUs (2-512)" |
365 | range 2 512 | |
1da177e4 | 366 | depends on SMP |
5a79859a | 367 | default "64" |
1da177e4 LT |
368 | help |
369 | This allows you to specify the maximum number of CPUs which this | |
5c75a0da | 370 | kernel will support. The maximum supported value is 512 and the |
1da177e4 LT |
371 | minimum value which makes sense is 2. |
372 | ||
373 | This is purely to save memory - each supported CPU adds | |
374 | approximately sixteen kilobytes to the kernel image. | |
375 | ||
376 | config HOTPLUG_CPU | |
6f9a3c33 MS |
377 | def_bool y |
378 | prompt "Support for hot-pluggable CPUs" | |
1da177e4 | 379 | depends on SMP |
1da177e4 LT |
380 | help |
381 | Say Y here to be able to turn CPUs off and on. CPUs | |
382 | can be controlled through /sys/devices/system/cpu/cpu#. | |
383 | Say N if you want to disable CPU hotplug. | |
384 | ||
10ad34bc MS |
385 | config SCHED_SMT |
386 | def_bool n | |
387 | ||
8d11e021 | 388 | config SCHED_MC |
83a24e32 | 389 | def_bool n |
8d11e021 | 390 | |
4cb14bc8 | 391 | config SCHED_BOOK |
10ad34bc MS |
392 | def_bool n |
393 | ||
394 | config SCHED_TOPOLOGY | |
6f9a3c33 | 395 | def_bool y |
10ad34bc | 396 | prompt "Topology scheduler support" |
83a24e32 | 397 | depends on SMP |
10ad34bc | 398 | select SCHED_SMT |
83a24e32 | 399 | select SCHED_MC |
10ad34bc | 400 | select SCHED_BOOK |
4cb14bc8 | 401 | help |
10ad34bc MS |
402 | Topology scheduler support improves the CPU scheduler's decision |
403 | making when dealing with machines that have multi-threading, | |
404 | multiple cores or multiple books. | |
4cb14bc8 | 405 | |
843c48fd JG |
406 | source kernel/Kconfig.preempt |
407 | ||
843c48fd | 408 | source kernel/Kconfig.hz |
1da177e4 | 409 | |
843c48fd | 410 | endmenu |
1da177e4 | 411 | |
843c48fd | 412 | menu "Memory setup" |
1d057720 | 413 | |
843c48fd | 414 | config ARCH_SPARSEMEM_ENABLE |
6f9a3c33 | 415 | def_bool y |
843c48fd JG |
416 | select SPARSEMEM_VMEMMAP_ENABLE |
417 | select SPARSEMEM_VMEMMAP | |
e65e1fc2 | 418 | |
843c48fd JG |
419 | config ARCH_SPARSEMEM_DEFAULT |
420 | def_bool y | |
1da177e4 | 421 | |
843c48fd JG |
422 | config ARCH_SELECT_MEMORY_MODEL |
423 | def_bool y | |
1da177e4 | 424 | |
843c48fd JG |
425 | config ARCH_ENABLE_MEMORY_HOTPLUG |
426 | def_bool y if SPARSEMEM | |
0efa4703 | 427 | |
843c48fd JG |
428 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
429 | def_bool y | |
e37f50e1 | 430 | |
ec66ad66 MS |
431 | config ARCH_ENABLE_SPLIT_PMD_PTLOCK |
432 | def_bool y | |
ec66ad66 | 433 | |
843c48fd JG |
434 | config FORCE_MAX_ZONEORDER |
435 | int | |
436 | default "9" | |
f861e405 | 437 | |
843c48fd | 438 | source "mm/Kconfig" |
1da177e4 LT |
439 | |
440 | config PACK_STACK | |
6f9a3c33 MS |
441 | def_bool y |
442 | prompt "Pack kernel stack" | |
1da177e4 LT |
443 | help |
444 | This option enables the compiler option -mkernel-backchain if it | |
445 | is available. If the option is available the compiler supports | |
446 | the new stack layout which dramatically reduces the minimum stack | |
447 | frame size. With an old compiler a non-leaf function needs a | |
448 | minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With | |
449 | -mkernel-backchain the minimum size drops to 16 byte on 31 bit | |
450 | and 24 byte on 64 bit. | |
451 | ||
452 | Say Y if you are unsure. | |
453 | ||
1da177e4 | 454 | config CHECK_STACK |
6f9a3c33 MS |
455 | def_bool y |
456 | prompt "Detect kernel stack overflow" | |
1da177e4 LT |
457 | help |
458 | This option enables the compiler option -mstack-guard and | |
459 | -mstack-size if they are available. If the compiler supports them | |
460 | it will emit additional code to each function prolog to trigger | |
461 | an illegal operation if the kernel stack is about to overflow. | |
462 | ||
463 | Say N if you are unsure. | |
464 | ||
465 | config STACK_GUARD | |
466 | int "Size of the guard area (128-1024)" | |
467 | range 128 1024 | |
468 | depends on CHECK_STACK | |
469 | default "256" | |
470 | help | |
471 | This allows you to specify the size of the guard area at the lower | |
472 | end of the kernel stack. If the kernel stack points into the guard | |
473 | area on function entry an illegal operation is triggered. The size | |
474 | needs to be a power of 2. Please keep in mind that the size of an | |
475 | interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit. | |
476 | The minimum size for the stack guard should be 256 for 31 bit and | |
477 | 512 for 64 bit. | |
478 | ||
2c190da4 | 479 | config WARN_DYNAMIC_STACK |
6f9a3c33 | 480 | def_bool n |
2c190da4 | 481 | prompt "Emit compiler warnings for function with dynamic stack usage" |
1da177e4 | 482 | help |
2c190da4 JG |
483 | This option enables the compiler option -mwarn-dynamicstack. If the |
484 | compiler supports this options generates warnings for functions | |
485 | that dynamically allocate stack space using alloca. | |
1da177e4 LT |
486 | |
487 | Say N if you are unsure. | |
488 | ||
843c48fd | 489 | endmenu |
3f22ab27 | 490 | |
843c48fd | 491 | menu "I/O subsystem" |
1da177e4 | 492 | |
1da177e4 | 493 | config QDIO |
6f9a3c33 MS |
494 | def_tristate y |
495 | prompt "QDIO support" | |
1da177e4 | 496 | ---help--- |
8129ee16 | 497 | This driver provides the Queued Direct I/O base support for |
efca13bc | 498 | IBM System z. |
1da177e4 LT |
499 | |
500 | To compile this driver as a module, choose M here: the | |
501 | module will be called qdio. | |
502 | ||
503 | If unsure, say Y. | |
504 | ||
c8717a3d JG |
505 | menuconfig PCI |
506 | bool "PCI support" | |
90114d65 | 507 | select HAVE_DMA_ATTRS |
c8717a3d JG |
508 | select PCI_MSI |
509 | help | |
510 | Enable PCI support. | |
511 | ||
512 | if PCI | |
513 | ||
514 | config PCI_NR_FUNCTIONS | |
515 | int "Maximum number of PCI functions (1-4096)" | |
516 | range 1 4096 | |
517 | default "64" | |
518 | help | |
519 | This allows you to specify the maximum number of PCI functions which | |
520 | this kernel will support. | |
521 | ||
1f44a225 MS |
522 | config PCI_NR_MSI |
523 | int "Maximum number of MSI interrupts (64-32768)" | |
524 | range 64 32768 | |
525 | default "256" | |
526 | help | |
527 | This defines the number of virtual interrupts the kernel will | |
528 | provide for MSI interrupts. If you configure your system to have | |
529 | too few drivers will fail to allocate MSI interrupts for all | |
530 | PCI devices. | |
531 | ||
c8717a3d JG |
532 | source "drivers/pci/Kconfig" |
533 | source "drivers/pci/pcie/Kconfig" | |
534 | source "drivers/pci/hotplug/Kconfig" | |
535 | ||
536 | endif # PCI | |
537 | ||
538 | config PCI_DOMAINS | |
539 | def_bool PCI | |
540 | ||
541 | config HAS_IOMEM | |
542 | def_bool PCI | |
543 | ||
544 | config IOMMU_HELPER | |
545 | def_bool PCI | |
546 | ||
547 | config HAS_DMA | |
548 | def_bool PCI | |
549 | select HAVE_DMA_API_DEBUG | |
550 | ||
551 | config NEED_SG_DMA_LENGTH | |
552 | def_bool PCI | |
553 | ||
91630032 JG |
554 | config NEED_DMA_MAP_STATE |
555 | def_bool PCI | |
556 | ||
9d92a7e1 | 557 | config CHSC_SCH |
d9c11b1e | 558 | def_tristate m |
6f9a3c33 | 559 | prompt "Support for CHSC subchannels" |
9d92a7e1 CH |
560 | help |
561 | This driver allows usage of CHSC subchannels. A CHSC subchannel | |
562 | is usually present on LPAR only. | |
563 | The driver creates a device /dev/chsc, which may be used to | |
564 | obtain I/O configuration information about the machine and | |
565 | to issue asynchronous chsc commands (DANGEROUS). | |
566 | You will usually only want to use this interface on a special | |
567 | LPAR designated for system management. | |
568 | ||
569 | To compile this driver as a module, choose M here: the | |
570 | module will be called chsc_sch. | |
571 | ||
572 | If unsure, say N. | |
573 | ||
1d1c8f78 SO |
574 | config SCM_BUS |
575 | def_bool y | |
1d1c8f78 SO |
576 | prompt "SCM bus driver" |
577 | help | |
578 | Bus driver for Storage Class Memory. | |
579 | ||
eadb86ab SO |
580 | config EADM_SCH |
581 | def_tristate m | |
582 | prompt "Support for EADM subchannels" | |
583 | depends on SCM_BUS | |
584 | help | |
585 | This driver allows usage of EADM subchannels. EADM subchannels act | |
586 | as a communication vehicle for SCM increments. | |
587 | ||
588 | To compile this driver as a module, choose M here: the | |
589 | module will be called eadm_sch. | |
590 | ||
843c48fd JG |
591 | endmenu |
592 | ||
593 | menu "Dump support" | |
594 | ||
595 | config CRASH_DUMP | |
596 | bool "kernel crash dumps" | |
5a79859a | 597 | depends on SMP |
843c48fd JG |
598 | select KEXEC |
599 | help | |
600 | Generate crash dump after being started by kexec. | |
601 | Crash dump kernels are loaded in the main kernel with kexec-tools | |
602 | into a specially reserved region and then later executed after | |
603 | a crash by kdump/kexec. | |
843c48fd | 604 | Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this. |
bf28a597 MH |
605 | This option also enables s390 zfcpdump. |
606 | See also <file:Documentation/s390/zfcpdump.txt> | |
843c48fd JG |
607 | |
608 | endmenu | |
609 | ||
610 | menu "Executable file formats / Emulations" | |
1da177e4 | 611 | |
1da177e4 LT |
612 | source "fs/Kconfig.binfmt" |
613 | ||
843c48fd JG |
614 | config SECCOMP |
615 | def_bool y | |
616 | prompt "Enable seccomp to safely compute untrusted bytecode" | |
617 | depends on PROC_FS | |
618 | help | |
619 | This kernel feature is useful for number crunching applications | |
620 | that may need to compute untrusted bytecode during their | |
621 | execution. By using pipes or other transports made available to | |
622 | the process as file descriptors supporting the read/write | |
623 | syscalls, it's possible to isolate those applications in | |
624 | their own address space using seccomp. Once seccomp is | |
625 | enabled via /proc/<pid>/seccomp, it cannot be disabled | |
626 | and the task is only allowed to execute a few safe syscalls | |
627 | defined by each seccomp mode. | |
628 | ||
629 | If unsure, say Y. | |
630 | ||
631 | endmenu | |
632 | ||
633 | menu "Power Management" | |
634 | ||
635 | config ARCH_HIBERNATION_POSSIBLE | |
5a79859a | 636 | def_bool y |
843c48fd JG |
637 | |
638 | source "kernel/power/Kconfig" | |
639 | ||
640 | endmenu | |
641 | ||
642 | source "net/Kconfig" | |
643 | ||
644 | config PCMCIA | |
645 | def_bool n | |
646 | ||
647 | config CCW | |
648 | def_bool y | |
649 | ||
650 | source "drivers/Kconfig" | |
651 | ||
652 | source "fs/Kconfig" | |
653 | ||
654 | source "arch/s390/Kconfig.debug" | |
655 | ||
656 | source "security/Kconfig" | |
657 | ||
658 | source "crypto/Kconfig" | |
659 | ||
660 | source "lib/Kconfig" | |
661 | ||
662 | menu "Virtualization" | |
684de39b | 663 | |
1da177e4 | 664 | config PFAULT |
6f9a3c33 MS |
665 | def_bool y |
666 | prompt "Pseudo page fault support" | |
1da177e4 LT |
667 | help |
668 | Select this option, if you want to use PFAULT pseudo page fault | |
669 | handling under VM. If running native or in LPAR, this option | |
670 | has no effect. If your VM does not support PFAULT, PAGEEX | |
671 | pseudo page fault handling will be used. | |
672 | Note that VM 4.2 supports PFAULT but has a bug in its | |
673 | implementation that causes some problems. | |
674 | Everybody who wants to run Linux under VM != VM4.2 should select | |
675 | this option. | |
676 | ||
677 | config SHARED_KERNEL | |
0eccc783 HC |
678 | bool "VM shared kernel support" |
679 | depends on !JUMP_LABEL | |
1da177e4 LT |
680 | help |
681 | Select this option, if you want to share the text segment of the | |
682 | Linux kernel between different VM guests. This reduces memory | |
683 | usage with lots of guests but greatly increases kernel size. | |
9c9c1761 HC |
684 | Also if a kernel was IPL'ed from a shared segment the kexec system |
685 | call will not work. | |
1da177e4 LT |
686 | You should only select this option if you know what you are |
687 | doing and want to exploit this feature. | |
688 | ||
689 | config CMM | |
6f9a3c33 MS |
690 | def_tristate n |
691 | prompt "Cooperative memory management" | |
1da177e4 LT |
692 | help |
693 | Select this option, if you want to enable the kernel interface | |
694 | to reduce the memory size of the system. This is accomplished | |
695 | by allocating pages of memory and put them "on hold". This only | |
696 | makes sense for a system running under VM where the unused pages | |
697 | will be reused by VM for other guest systems. The interface | |
698 | allows an external monitor to balance memory of many systems. | |
699 | Everybody who wants to run Linux under VM should select this | |
700 | option. | |
701 | ||
1da177e4 | 702 | config CMM_IUCV |
6f9a3c33 MS |
703 | def_bool y |
704 | prompt "IUCV special message interface to cooperative memory management" | |
1da177e4 LT |
705 | depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV) |
706 | help | |
707 | Select this option to enable the special message interface to | |
708 | the cooperative memory management. | |
709 | ||
1da177e4 | 710 | config APPLDATA_BASE |
6f9a3c33 MS |
711 | def_bool n |
712 | prompt "Linux - VM Monitor Stream, base infrastructure" | |
c185b783 | 713 | depends on PROC_FS |
1da177e4 LT |
714 | help |
715 | This provides a kernel interface for creating and updating z/VM APPLDATA | |
716 | monitor records. The monitor records are updated at certain time | |
717 | intervals, once the timer is started. | |
718 | Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer, | |
719 | i.e. enables or disables monitoring on the Linux side. | |
720 | A custom interval value (in seconds) can be written to | |
721 | /proc/appldata/interval. | |
722 | ||
723 | Defaults are 60 seconds interval and timer off. | |
724 | The /proc entries can also be read from, showing the current settings. | |
725 | ||
726 | config APPLDATA_MEM | |
6f9a3c33 MS |
727 | def_tristate m |
728 | prompt "Monitor memory management statistics" | |
62fb2ba3 | 729 | depends on APPLDATA_BASE && VM_EVENT_COUNTERS |
1da177e4 LT |
730 | help |
731 | This provides memory management related data to the Linux - VM Monitor | |
732 | Stream, like paging/swapping rate, memory utilisation, etc. | |
733 | Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM | |
734 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
735 | on the z/VM side. | |
736 | ||
737 | Default is disabled. | |
738 | The /proc entry can also be read from, showing the current settings. | |
739 | ||
740 | This can also be compiled as a module, which will be called | |
741 | appldata_mem.o. | |
742 | ||
743 | config APPLDATA_OS | |
6f9a3c33 MS |
744 | def_tristate m |
745 | prompt "Monitor OS statistics" | |
1da177e4 LT |
746 | depends on APPLDATA_BASE |
747 | help | |
748 | This provides OS related data to the Linux - VM Monitor Stream, like | |
749 | CPU utilisation, etc. | |
750 | Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM | |
751 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
752 | on the z/VM side. | |
753 | ||
754 | Default is disabled. | |
755 | This can also be compiled as a module, which will be called | |
756 | appldata_os.o. | |
757 | ||
758 | config APPLDATA_NET_SUM | |
6f9a3c33 MS |
759 | def_tristate m |
760 | prompt "Monitor overall network statistics" | |
70193af9 | 761 | depends on APPLDATA_BASE && NET |
1da177e4 LT |
762 | help |
763 | This provides network related data to the Linux - VM Monitor Stream, | |
764 | currently there is only a total sum of network I/O statistics, no | |
765 | per-interface data. | |
766 | Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM | |
767 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
768 | on the z/VM side. | |
769 | ||
770 | Default is disabled. | |
771 | This can also be compiled as a module, which will be called | |
772 | appldata_net_sum.o. | |
773 | ||
24bbb1fa | 774 | config S390_HYPFS_FS |
6f9a3c33 MS |
775 | def_bool y |
776 | prompt "s390 hypervisor file system support" | |
24bbb1fa | 777 | select SYS_HYPERVISOR |
24bbb1fa MH |
778 | help |
779 | This is a virtual file system intended to provide accounting | |
780 | information in an s390 hypervisor environment. | |
781 | ||
843c48fd | 782 | source "arch/s390/kvm/Kconfig" |
411ed322 | 783 | |
fa587743 | 784 | config S390_GUEST |
6f9a3c33 | 785 | def_bool y |
510cf5a6 | 786 | prompt "s390 support for virtio devices" |
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 |