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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 | 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 | 107 | select GENERIC_CLOCKEVENTS |
8f00b3e2 | 108 | select GENERIC_CPU_AUTOPROBE |
0e0d04a8 | 109 | select GENERIC_CPU_DEVICES if !SMP |
746479cd | 110 | select GENERIC_FIND_FIRST_BIT |
e80e7813 | 111 | select GENERIC_SMP_IDLE_THREAD |
79c74ecb | 112 | select GENERIC_TIME_VSYSCALL |
0e0d04a8 | 113 | select HAVE_ALIGNED_STRUCT_PAGE if SLUB |
7a017721 | 114 | select HAVE_ARCH_AUDITSYSCALL |
5a79859a | 115 | select HAVE_ARCH_JUMP_LABEL |
c63cb468 | 116 | select HAVE_ARCH_SECCOMP_FILTER |
0e0d04a8 | 117 | select HAVE_ARCH_TRACEHOOK |
5a79859a | 118 | select HAVE_ARCH_TRANSPARENT_HUGEPAGE |
77a87f0c | 119 | select HAVE_BPF_JIT if PACK_STACK && HAVE_MARCH_Z196_FEATURES |
0e0d04a8 HC |
120 | select HAVE_CMPXCHG_DOUBLE |
121 | select HAVE_CMPXCHG_LOCAL | |
0e0d04a8 | 122 | select HAVE_DEBUG_KMEMLEAK |
5a79859a HC |
123 | select HAVE_DYNAMIC_FTRACE |
124 | select HAVE_DYNAMIC_FTRACE_WITH_REGS | |
0e0d04a8 | 125 | select HAVE_FTRACE_MCOUNT_RECORD |
5a79859a HC |
126 | select HAVE_FUNCTION_GRAPH_TRACER |
127 | select HAVE_FUNCTION_TRACER | |
03b8c7b6 | 128 | select HAVE_FUTEX_CMPXCHG if FUTEX |
0e0d04a8 HC |
129 | select HAVE_KERNEL_BZIP2 |
130 | select HAVE_KERNEL_GZIP | |
8e2872ce | 131 | select HAVE_KERNEL_LZ4 |
0e0d04a8 HC |
132 | select HAVE_KERNEL_LZMA |
133 | select HAVE_KERNEL_LZO | |
134 | select HAVE_KERNEL_XZ | |
135 | select HAVE_KPROBES | |
136 | select HAVE_KRETPROBES | |
5a79859a | 137 | select HAVE_KVM |
21042d43 | 138 | select HAVE_LIVEPATCH |
0e0d04a8 HC |
139 | select HAVE_MEMBLOCK |
140 | select HAVE_MEMBLOCK_NODE_MAP | |
50be6345 | 141 | select HAVE_MEMBLOCK_PHYS_MAP |
786d35d4 | 142 | select HAVE_MOD_ARCH_SPECIFIC |
0e0d04a8 HC |
143 | select HAVE_OPROFILE |
144 | select HAVE_PERF_EVENTS | |
145 | select HAVE_REGS_AND_STACK_ACCESS_API | |
146 | select HAVE_SYSCALL_TRACEPOINTS | |
0e0d04a8 | 147 | select HAVE_VIRT_CPU_ACCOUNTING |
786d35d4 | 148 | select MODULES_USE_ELF_RELA |
50be6345 | 149 | select NO_BOOTMEM |
7eddd99c | 150 | select OLD_SIGACTION |
93bead43 | 151 | select OLD_SIGSUSPEND3 |
0e0d04a8 | 152 | select SYSCTL_EXCEPTION_TRACE |
0563416b | 153 | select TTY |
0e0d04a8 | 154 | select VIRT_CPU_ACCOUNTING |
93bead43 | 155 | select VIRT_TO_BUS |
1da177e4 | 156 | |
fca3e357 | 157 | config SCHED_OMIT_FRAME_POINTER |
6f9a3c33 | 158 | def_bool y |
fca3e357 | 159 | |
c81956c9 KS |
160 | config PGTABLE_LEVELS |
161 | int | |
162 | default 4 if 64BIT | |
163 | default 2 | |
164 | ||
1da177e4 LT |
165 | source "init/Kconfig" |
166 | ||
dc52ddc0 MH |
167 | source "kernel/Kconfig.freezer" |
168 | ||
21042d43 JS |
169 | source "kernel/livepatch/Kconfig" |
170 | ||
843c48fd JG |
171 | menu "Processor type and features" |
172 | ||
173 | config HAVE_MARCH_Z900_FEATURES | |
174 | def_bool n | |
175 | ||
176 | config HAVE_MARCH_Z990_FEATURES | |
177 | def_bool n | |
178 | select HAVE_MARCH_Z900_FEATURES | |
179 | ||
180 | config HAVE_MARCH_Z9_109_FEATURES | |
181 | def_bool n | |
182 | select HAVE_MARCH_Z990_FEATURES | |
183 | ||
184 | config HAVE_MARCH_Z10_FEATURES | |
185 | def_bool n | |
186 | select HAVE_MARCH_Z9_109_FEATURES | |
187 | ||
188 | config HAVE_MARCH_Z196_FEATURES | |
189 | def_bool n | |
190 | select HAVE_MARCH_Z10_FEATURES | |
191 | ||
991c1505 HC |
192 | config HAVE_MARCH_ZEC12_FEATURES |
193 | def_bool n | |
194 | select HAVE_MARCH_Z196_FEATURES | |
195 | ||
f8b2dcbd MS |
196 | config HAVE_MARCH_Z13_FEATURES |
197 | def_bool n | |
198 | select HAVE_MARCH_ZEC12_FEATURES | |
199 | ||
843c48fd JG |
200 | choice |
201 | prompt "Processor type" | |
5a79859a | 202 | default MARCH_Z900 |
1da177e4 | 203 | |
843c48fd JG |
204 | config MARCH_Z900 |
205 | bool "IBM zSeries model z800 and z900" | |
5a79859a | 206 | select HAVE_MARCH_Z900_FEATURES |
843c48fd JG |
207 | help |
208 | Select this to enable optimizations for model z800/z900 (2064 and | |
209 | 2066 series). This will enable some optimizations that are not | |
210 | available on older ESA/390 (31 Bit) only CPUs. | |
211 | ||
212 | config MARCH_Z990 | |
213 | bool "IBM zSeries model z890 and z990" | |
5a79859a | 214 | select HAVE_MARCH_Z990_FEATURES |
843c48fd JG |
215 | help |
216 | Select this to enable optimizations for model z890/z990 (2084 and | |
217 | 2086 series). The kernel will be slightly faster but will not work | |
218 | on older machines. | |
219 | ||
220 | config MARCH_Z9_109 | |
221 | bool "IBM System z9" | |
5a79859a | 222 | select HAVE_MARCH_Z9_109_FEATURES |
843c48fd JG |
223 | help |
224 | Select this to enable optimizations for IBM System z9 (2094 and | |
225 | 2096 series). The kernel will be slightly faster but will not work | |
226 | on older machines. | |
227 | ||
228 | config MARCH_Z10 | |
229 | bool "IBM System z10" | |
5a79859a | 230 | select HAVE_MARCH_Z10_FEATURES |
843c48fd JG |
231 | help |
232 | Select this to enable optimizations for IBM System z10 (2097 and | |
233 | 2098 series). The kernel will be slightly faster but will not work | |
234 | on older machines. | |
235 | ||
236 | config MARCH_Z196 | |
237 | bool "IBM zEnterprise 114 and 196" | |
5a79859a | 238 | select HAVE_MARCH_Z196_FEATURES |
843c48fd JG |
239 | help |
240 | Select this to enable optimizations for IBM zEnterprise 114 and 196 | |
241 | (2818 and 2817 series). The kernel will be slightly faster but will | |
242 | not work on older machines. | |
1da177e4 | 243 | |
991c1505 | 244 | config MARCH_ZEC12 |
59471227 | 245 | bool "IBM zBC12 and zEC12" |
5a79859a | 246 | select HAVE_MARCH_ZEC12_FEATURES |
991c1505 | 247 | help |
59471227 HC |
248 | Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and |
249 | 2827 series). The kernel will be slightly faster but will not work on | |
250 | older machines. | |
991c1505 | 251 | |
f8b2dcbd MS |
252 | config MARCH_Z13 |
253 | bool "IBM z13" | |
5a79859a | 254 | select HAVE_MARCH_Z13_FEATURES |
f8b2dcbd MS |
255 | help |
256 | Select this to enable optimizations for IBM z13 (2964 series). | |
257 | The kernel will be slightly faster but will not work on older | |
258 | machines. | |
259 | ||
843c48fd | 260 | endchoice |
1da177e4 | 261 | |
1db9e051 HC |
262 | config MARCH_Z900_TUNE |
263 | def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT | |
264 | ||
265 | config MARCH_Z990_TUNE | |
266 | def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT | |
267 | ||
268 | config MARCH_Z9_109_TUNE | |
269 | def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT | |
270 | ||
271 | config MARCH_Z10_TUNE | |
272 | def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT | |
273 | ||
274 | config MARCH_Z196_TUNE | |
275 | def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT | |
276 | ||
277 | config MARCH_ZEC12_TUNE | |
278 | def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT | |
279 | ||
f8b2dcbd MS |
280 | config MARCH_Z13_TUNE |
281 | def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT | |
282 | ||
1db9e051 HC |
283 | choice |
284 | prompt "Tune code generation" | |
285 | default TUNE_DEFAULT | |
286 | help | |
287 | Cause the compiler to tune (-mtune) the generated code for a machine. | |
288 | This will make the code run faster on the selected machine but | |
289 | somewhat slower on other machines. | |
290 | This option only changes how the compiler emits instructions, not the | |
291 | selection of instructions itself, so the resulting kernel will run on | |
292 | all other machines. | |
293 | ||
294 | config TUNE_DEFAULT | |
295 | bool "Default" | |
296 | help | |
297 | Tune the generated code for the target processor for which the kernel | |
298 | will be compiled. | |
299 | ||
1db9e051 HC |
300 | config TUNE_Z900 |
301 | bool "IBM zSeries model z800 and z900" | |
302 | ||
303 | config TUNE_Z990 | |
304 | bool "IBM zSeries model z890 and z990" | |
305 | ||
306 | config TUNE_Z9_109 | |
307 | bool "IBM System z9" | |
308 | ||
309 | config TUNE_Z10 | |
310 | bool "IBM System z10" | |
311 | ||
312 | config TUNE_Z196 | |
313 | bool "IBM zEnterprise 114 and 196" | |
314 | ||
315 | config TUNE_ZEC12 | |
316 | bool "IBM zBC12 and zEC12" | |
317 | ||
f8b2dcbd MS |
318 | config TUNE_Z13 |
319 | bool "IBM z13" | |
320 | ||
1db9e051 HC |
321 | endchoice |
322 | ||
347a8dc3 | 323 | config 64BIT |
6f9a3c33 | 324 | def_bool y |
d9f7a745 | 325 | |
843c48fd JG |
326 | config COMPAT |
327 | def_bool y | |
328 | prompt "Kernel support for 31 bit emulation" | |
843c48fd JG |
329 | select COMPAT_BINFMT_ELF if BINFMT_ELF |
330 | select ARCH_WANT_OLD_COMPAT_IPC | |
7eddd99c | 331 | select COMPAT_OLD_SIGACTION |
2813893f | 332 | depends on MULTIUSER |
843c48fd JG |
333 | help |
334 | Select this option if you want to enable your system kernel to | |
335 | handle system-calls from ELF binaries for 31 bit ESA. This option | |
336 | (and some other stuff like libraries and such) is needed for | |
337 | executing 31 bit applications. It is safe to say "Y". | |
338 | ||
339 | config SYSVIPC_COMPAT | |
340 | def_bool y if COMPAT && SYSVIPC | |
341 | ||
342 | config KEYS_COMPAT | |
343 | def_bool y if COMPAT && KEYS | |
344 | ||
1da177e4 | 345 | config SMP |
6f9a3c33 MS |
346 | def_bool y |
347 | prompt "Symmetric multi-processing support" | |
1da177e4 LT |
348 | ---help--- |
349 | This enables support for systems with more than one CPU. If you have | |
350 | a system with only one CPU, like most personal computers, say N. If | |
351 | you have a system with more than one CPU, say Y. | |
352 | ||
4a474157 | 353 | If you say N here, the kernel will run on uni- and multiprocessor |
1da177e4 LT |
354 | machines, but will use only one CPU of a multiprocessor machine. If |
355 | you say Y here, the kernel will run on many, but not all, | |
4a474157 | 356 | uniprocessor machines. On a uniprocessor machine, the kernel |
1da177e4 LT |
357 | will run faster if you say N here. |
358 | ||
03502faa AB |
359 | See also the SMP-HOWTO available at |
360 | <http://www.tldp.org/docs.html#howto>. | |
1da177e4 LT |
361 | |
362 | Even if you don't know what to do here, say Y. | |
363 | ||
364 | config NR_CPUS | |
5c75a0da HC |
365 | int "Maximum number of CPUs (2-512)" |
366 | range 2 512 | |
1da177e4 | 367 | depends on SMP |
5a79859a | 368 | default "64" |
1da177e4 LT |
369 | help |
370 | This allows you to specify the maximum number of CPUs which this | |
5c75a0da | 371 | kernel will support. The maximum supported value is 512 and the |
1da177e4 LT |
372 | minimum value which makes sense is 2. |
373 | ||
374 | This is purely to save memory - each supported CPU adds | |
375 | approximately sixteen kilobytes to the kernel image. | |
376 | ||
377 | config HOTPLUG_CPU | |
6f9a3c33 MS |
378 | def_bool y |
379 | prompt "Support for hot-pluggable CPUs" | |
1da177e4 | 380 | depends on SMP |
1da177e4 LT |
381 | help |
382 | Say Y here to be able to turn CPUs off and on. CPUs | |
383 | can be controlled through /sys/devices/system/cpu/cpu#. | |
384 | Say N if you want to disable CPU hotplug. | |
385 | ||
10ad34bc MS |
386 | config SCHED_SMT |
387 | def_bool n | |
388 | ||
8d11e021 | 389 | config SCHED_MC |
83a24e32 | 390 | def_bool n |
8d11e021 | 391 | |
4cb14bc8 | 392 | config SCHED_BOOK |
10ad34bc MS |
393 | def_bool n |
394 | ||
395 | config SCHED_TOPOLOGY | |
6f9a3c33 | 396 | def_bool y |
10ad34bc | 397 | prompt "Topology scheduler support" |
83a24e32 | 398 | depends on SMP |
10ad34bc | 399 | select SCHED_SMT |
83a24e32 | 400 | select SCHED_MC |
10ad34bc | 401 | select SCHED_BOOK |
4cb14bc8 | 402 | help |
10ad34bc MS |
403 | Topology scheduler support improves the CPU scheduler's decision |
404 | making when dealing with machines that have multi-threading, | |
405 | multiple cores or multiple books. | |
4cb14bc8 | 406 | |
843c48fd JG |
407 | source kernel/Kconfig.preempt |
408 | ||
843c48fd | 409 | source kernel/Kconfig.hz |
1da177e4 | 410 | |
843c48fd | 411 | endmenu |
1da177e4 | 412 | |
843c48fd | 413 | menu "Memory setup" |
1d057720 | 414 | |
843c48fd | 415 | config ARCH_SPARSEMEM_ENABLE |
6f9a3c33 | 416 | def_bool y |
843c48fd JG |
417 | select SPARSEMEM_VMEMMAP_ENABLE |
418 | select SPARSEMEM_VMEMMAP | |
e65e1fc2 | 419 | |
843c48fd JG |
420 | config ARCH_SPARSEMEM_DEFAULT |
421 | def_bool y | |
1da177e4 | 422 | |
843c48fd JG |
423 | config ARCH_SELECT_MEMORY_MODEL |
424 | def_bool y | |
1da177e4 | 425 | |
843c48fd JG |
426 | config ARCH_ENABLE_MEMORY_HOTPLUG |
427 | def_bool y if SPARSEMEM | |
0efa4703 | 428 | |
843c48fd JG |
429 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
430 | def_bool y | |
e37f50e1 | 431 | |
ec66ad66 MS |
432 | config ARCH_ENABLE_SPLIT_PMD_PTLOCK |
433 | def_bool y | |
ec66ad66 | 434 | |
843c48fd JG |
435 | config FORCE_MAX_ZONEORDER |
436 | int | |
437 | default "9" | |
f861e405 | 438 | |
843c48fd | 439 | source "mm/Kconfig" |
1da177e4 LT |
440 | |
441 | config PACK_STACK | |
6f9a3c33 MS |
442 | def_bool y |
443 | prompt "Pack kernel stack" | |
1da177e4 LT |
444 | help |
445 | This option enables the compiler option -mkernel-backchain if it | |
446 | is available. If the option is available the compiler supports | |
447 | the new stack layout which dramatically reduces the minimum stack | |
448 | frame size. With an old compiler a non-leaf function needs a | |
449 | minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With | |
450 | -mkernel-backchain the minimum size drops to 16 byte on 31 bit | |
451 | and 24 byte on 64 bit. | |
452 | ||
453 | Say Y if you are unsure. | |
454 | ||
1da177e4 | 455 | config CHECK_STACK |
6f9a3c33 MS |
456 | def_bool y |
457 | prompt "Detect kernel stack overflow" | |
1da177e4 LT |
458 | help |
459 | This option enables the compiler option -mstack-guard and | |
460 | -mstack-size if they are available. If the compiler supports them | |
461 | it will emit additional code to each function prolog to trigger | |
462 | an illegal operation if the kernel stack is about to overflow. | |
463 | ||
464 | Say N if you are unsure. | |
465 | ||
466 | config STACK_GUARD | |
467 | int "Size of the guard area (128-1024)" | |
468 | range 128 1024 | |
469 | depends on CHECK_STACK | |
470 | default "256" | |
471 | help | |
472 | This allows you to specify the size of the guard area at the lower | |
473 | end of the kernel stack. If the kernel stack points into the guard | |
474 | area on function entry an illegal operation is triggered. The size | |
475 | needs to be a power of 2. Please keep in mind that the size of an | |
476 | interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit. | |
477 | The minimum size for the stack guard should be 256 for 31 bit and | |
478 | 512 for 64 bit. | |
479 | ||
2c190da4 | 480 | config WARN_DYNAMIC_STACK |
6f9a3c33 | 481 | def_bool n |
2c190da4 | 482 | prompt "Emit compiler warnings for function with dynamic stack usage" |
1da177e4 | 483 | help |
2c190da4 JG |
484 | This option enables the compiler option -mwarn-dynamicstack. If the |
485 | compiler supports this options generates warnings for functions | |
486 | that dynamically allocate stack space using alloca. | |
1da177e4 LT |
487 | |
488 | Say N if you are unsure. | |
489 | ||
843c48fd | 490 | endmenu |
3f22ab27 | 491 | |
843c48fd | 492 | menu "I/O subsystem" |
1da177e4 | 493 | |
1da177e4 | 494 | config QDIO |
6f9a3c33 MS |
495 | def_tristate y |
496 | prompt "QDIO support" | |
1da177e4 | 497 | ---help--- |
8129ee16 | 498 | This driver provides the Queued Direct I/O base support for |
efca13bc | 499 | IBM System z. |
1da177e4 LT |
500 | |
501 | To compile this driver as a module, choose M here: the | |
502 | module will be called qdio. | |
503 | ||
504 | If unsure, say Y. | |
505 | ||
c8717a3d JG |
506 | menuconfig PCI |
507 | bool "PCI support" | |
90114d65 | 508 | select HAVE_DMA_ATTRS |
c8717a3d JG |
509 | select PCI_MSI |
510 | help | |
511 | Enable PCI support. | |
512 | ||
513 | if PCI | |
514 | ||
515 | config PCI_NR_FUNCTIONS | |
516 | int "Maximum number of PCI functions (1-4096)" | |
517 | range 1 4096 | |
518 | default "64" | |
519 | help | |
520 | This allows you to specify the maximum number of PCI functions which | |
521 | this kernel will support. | |
522 | ||
1f44a225 MS |
523 | config PCI_NR_MSI |
524 | int "Maximum number of MSI interrupts (64-32768)" | |
525 | range 64 32768 | |
526 | default "256" | |
527 | help | |
528 | This defines the number of virtual interrupts the kernel will | |
529 | provide for MSI interrupts. If you configure your system to have | |
530 | too few drivers will fail to allocate MSI interrupts for all | |
531 | PCI devices. | |
532 | ||
c8717a3d JG |
533 | source "drivers/pci/Kconfig" |
534 | source "drivers/pci/pcie/Kconfig" | |
535 | source "drivers/pci/hotplug/Kconfig" | |
536 | ||
537 | endif # PCI | |
538 | ||
539 | config PCI_DOMAINS | |
540 | def_bool PCI | |
541 | ||
542 | config HAS_IOMEM | |
543 | def_bool PCI | |
544 | ||
545 | config IOMMU_HELPER | |
546 | def_bool PCI | |
547 | ||
548 | config HAS_DMA | |
549 | def_bool PCI | |
550 | select HAVE_DMA_API_DEBUG | |
551 | ||
552 | config NEED_SG_DMA_LENGTH | |
553 | def_bool PCI | |
554 | ||
91630032 JG |
555 | config NEED_DMA_MAP_STATE |
556 | def_bool PCI | |
557 | ||
9d92a7e1 | 558 | config CHSC_SCH |
d9c11b1e | 559 | def_tristate m |
6f9a3c33 | 560 | prompt "Support for CHSC subchannels" |
9d92a7e1 CH |
561 | help |
562 | This driver allows usage of CHSC subchannels. A CHSC subchannel | |
563 | is usually present on LPAR only. | |
564 | The driver creates a device /dev/chsc, which may be used to | |
565 | obtain I/O configuration information about the machine and | |
566 | to issue asynchronous chsc commands (DANGEROUS). | |
567 | You will usually only want to use this interface on a special | |
568 | LPAR designated for system management. | |
569 | ||
570 | To compile this driver as a module, choose M here: the | |
571 | module will be called chsc_sch. | |
572 | ||
573 | If unsure, say N. | |
574 | ||
1d1c8f78 SO |
575 | config SCM_BUS |
576 | def_bool y | |
1d1c8f78 SO |
577 | prompt "SCM bus driver" |
578 | help | |
579 | Bus driver for Storage Class Memory. | |
580 | ||
eadb86ab SO |
581 | config EADM_SCH |
582 | def_tristate m | |
583 | prompt "Support for EADM subchannels" | |
584 | depends on SCM_BUS | |
585 | help | |
586 | This driver allows usage of EADM subchannels. EADM subchannels act | |
587 | as a communication vehicle for SCM increments. | |
588 | ||
589 | To compile this driver as a module, choose M here: the | |
590 | module will be called eadm_sch. | |
591 | ||
843c48fd JG |
592 | endmenu |
593 | ||
594 | menu "Dump support" | |
595 | ||
596 | config CRASH_DUMP | |
597 | bool "kernel crash dumps" | |
5a79859a | 598 | depends on SMP |
843c48fd JG |
599 | select KEXEC |
600 | help | |
601 | Generate crash dump after being started by kexec. | |
602 | Crash dump kernels are loaded in the main kernel with kexec-tools | |
603 | into a specially reserved region and then later executed after | |
604 | a crash by kdump/kexec. | |
843c48fd | 605 | Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this. |
bf28a597 MH |
606 | This option also enables s390 zfcpdump. |
607 | See also <file:Documentation/s390/zfcpdump.txt> | |
843c48fd JG |
608 | |
609 | endmenu | |
610 | ||
611 | menu "Executable file formats / Emulations" | |
1da177e4 | 612 | |
1da177e4 LT |
613 | source "fs/Kconfig.binfmt" |
614 | ||
843c48fd JG |
615 | config SECCOMP |
616 | def_bool y | |
617 | prompt "Enable seccomp to safely compute untrusted bytecode" | |
618 | depends on PROC_FS | |
619 | help | |
620 | This kernel feature is useful for number crunching applications | |
621 | that may need to compute untrusted bytecode during their | |
622 | execution. By using pipes or other transports made available to | |
623 | the process as file descriptors supporting the read/write | |
624 | syscalls, it's possible to isolate those applications in | |
625 | their own address space using seccomp. Once seccomp is | |
626 | enabled via /proc/<pid>/seccomp, it cannot be disabled | |
627 | and the task is only allowed to execute a few safe syscalls | |
628 | defined by each seccomp mode. | |
629 | ||
630 | If unsure, say Y. | |
631 | ||
632 | endmenu | |
633 | ||
634 | menu "Power Management" | |
635 | ||
636 | config ARCH_HIBERNATION_POSSIBLE | |
5a79859a | 637 | def_bool y |
843c48fd JG |
638 | |
639 | source "kernel/power/Kconfig" | |
640 | ||
641 | endmenu | |
642 | ||
643 | source "net/Kconfig" | |
644 | ||
645 | config PCMCIA | |
646 | def_bool n | |
647 | ||
648 | config CCW | |
649 | def_bool y | |
650 | ||
651 | source "drivers/Kconfig" | |
652 | ||
653 | source "fs/Kconfig" | |
654 | ||
655 | source "arch/s390/Kconfig.debug" | |
656 | ||
657 | source "security/Kconfig" | |
658 | ||
659 | source "crypto/Kconfig" | |
660 | ||
661 | source "lib/Kconfig" | |
662 | ||
663 | menu "Virtualization" | |
684de39b | 664 | |
1da177e4 | 665 | config PFAULT |
6f9a3c33 MS |
666 | def_bool y |
667 | prompt "Pseudo page fault support" | |
1da177e4 LT |
668 | help |
669 | Select this option, if you want to use PFAULT pseudo page fault | |
670 | handling under VM. If running native or in LPAR, this option | |
671 | has no effect. If your VM does not support PFAULT, PAGEEX | |
672 | pseudo page fault handling will be used. | |
673 | Note that VM 4.2 supports PFAULT but has a bug in its | |
674 | implementation that causes some problems. | |
675 | Everybody who wants to run Linux under VM != VM4.2 should select | |
676 | this option. | |
677 | ||
678 | config SHARED_KERNEL | |
0eccc783 HC |
679 | bool "VM shared kernel support" |
680 | depends on !JUMP_LABEL | |
1da177e4 LT |
681 | help |
682 | Select this option, if you want to share the text segment of the | |
683 | Linux kernel between different VM guests. This reduces memory | |
684 | usage with lots of guests but greatly increases kernel size. | |
9c9c1761 HC |
685 | Also if a kernel was IPL'ed from a shared segment the kexec system |
686 | call will not work. | |
1da177e4 LT |
687 | You should only select this option if you know what you are |
688 | doing and want to exploit this feature. | |
689 | ||
690 | config CMM | |
6f9a3c33 MS |
691 | def_tristate n |
692 | prompt "Cooperative memory management" | |
1da177e4 LT |
693 | help |
694 | Select this option, if you want to enable the kernel interface | |
695 | to reduce the memory size of the system. This is accomplished | |
696 | by allocating pages of memory and put them "on hold". This only | |
697 | makes sense for a system running under VM where the unused pages | |
698 | will be reused by VM for other guest systems. The interface | |
699 | allows an external monitor to balance memory of many systems. | |
700 | Everybody who wants to run Linux under VM should select this | |
701 | option. | |
702 | ||
1da177e4 | 703 | config CMM_IUCV |
6f9a3c33 MS |
704 | def_bool y |
705 | prompt "IUCV special message interface to cooperative memory management" | |
1da177e4 LT |
706 | depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV) |
707 | help | |
708 | Select this option to enable the special message interface to | |
709 | the cooperative memory management. | |
710 | ||
1da177e4 | 711 | config APPLDATA_BASE |
6f9a3c33 MS |
712 | def_bool n |
713 | prompt "Linux - VM Monitor Stream, base infrastructure" | |
c185b783 | 714 | depends on PROC_FS |
1da177e4 LT |
715 | help |
716 | This provides a kernel interface for creating and updating z/VM APPLDATA | |
717 | monitor records. The monitor records are updated at certain time | |
718 | intervals, once the timer is started. | |
719 | Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer, | |
720 | i.e. enables or disables monitoring on the Linux side. | |
721 | A custom interval value (in seconds) can be written to | |
722 | /proc/appldata/interval. | |
723 | ||
724 | Defaults are 60 seconds interval and timer off. | |
725 | The /proc entries can also be read from, showing the current settings. | |
726 | ||
727 | config APPLDATA_MEM | |
6f9a3c33 MS |
728 | def_tristate m |
729 | prompt "Monitor memory management statistics" | |
62fb2ba3 | 730 | depends on APPLDATA_BASE && VM_EVENT_COUNTERS |
1da177e4 LT |
731 | help |
732 | This provides memory management related data to the Linux - VM Monitor | |
733 | Stream, like paging/swapping rate, memory utilisation, etc. | |
734 | Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM | |
735 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
736 | on the z/VM side. | |
737 | ||
738 | Default is disabled. | |
739 | The /proc entry can also be read from, showing the current settings. | |
740 | ||
741 | This can also be compiled as a module, which will be called | |
742 | appldata_mem.o. | |
743 | ||
744 | config APPLDATA_OS | |
6f9a3c33 MS |
745 | def_tristate m |
746 | prompt "Monitor OS statistics" | |
1da177e4 LT |
747 | depends on APPLDATA_BASE |
748 | help | |
749 | This provides OS related data to the Linux - VM Monitor Stream, like | |
750 | CPU utilisation, etc. | |
751 | Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM | |
752 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
753 | on the z/VM side. | |
754 | ||
755 | Default is disabled. | |
756 | This can also be compiled as a module, which will be called | |
757 | appldata_os.o. | |
758 | ||
759 | config APPLDATA_NET_SUM | |
6f9a3c33 MS |
760 | def_tristate m |
761 | prompt "Monitor overall network statistics" | |
70193af9 | 762 | depends on APPLDATA_BASE && NET |
1da177e4 LT |
763 | help |
764 | This provides network related data to the Linux - VM Monitor Stream, | |
765 | currently there is only a total sum of network I/O statistics, no | |
766 | per-interface data. | |
767 | Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM | |
768 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
769 | on the z/VM side. | |
770 | ||
771 | Default is disabled. | |
772 | This can also be compiled as a module, which will be called | |
773 | appldata_net_sum.o. | |
774 | ||
24bbb1fa | 775 | config S390_HYPFS_FS |
6f9a3c33 MS |
776 | def_bool y |
777 | prompt "s390 hypervisor file system support" | |
24bbb1fa | 778 | select SYS_HYPERVISOR |
24bbb1fa MH |
779 | help |
780 | This is a virtual file system intended to provide accounting | |
781 | information in an s390 hypervisor environment. | |
782 | ||
843c48fd | 783 | source "arch/s390/kvm/Kconfig" |
411ed322 | 784 | |
fa587743 | 785 | config S390_GUEST |
6f9a3c33 | 786 | def_bool y |
510cf5a6 | 787 | prompt "s390 support for virtio devices" |
79b6f7fb | 788 | select TTY |
80629b0b | 789 | select VIRTUALIZATION |
fa587743 | 790 | select VIRTIO |
faeba830 | 791 | select VIRTIO_CONSOLE |
fa587743 | 792 | help |
bdd1fc27 CH |
793 | Enabling this option adds support for virtio based paravirtual device |
794 | drivers on s390. | |
1da177e4 | 795 | |
20766c08 | 796 | Select this option if you want to run the kernel as a guest under |
bdd1fc27 | 797 | the KVM hypervisor. |
155af2f9 HJP |
798 | |
799 | endmenu |