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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 | |
2fd92273 HC |
7 | config CPU_BIG_ENDIAN |
8 | def_bool y | |
9 | ||
2b105ff9 | 10 | config LOCKDEP_SUPPORT |
61d48c2c | 11 | def_bool y |
2b105ff9 | 12 | |
5bdc9b44 | 13 | config STACKTRACE_SUPPORT |
61d48c2c | 14 | def_bool y |
5bdc9b44 | 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 | |
2965faa5 | 51 | select KEXEC_CORE |
843c48fd JG |
52 | |
53 | config AUDIT_ARCH | |
54 | def_bool y | |
55 | ||
ce816fa8 | 56 | config NO_IOPORT_MAP |
c8717a3d JG |
57 | def_bool y |
58 | ||
59 | config PCI_QUIRKS | |
60 | def_bool n | |
61 | ||
2a0a5b22 | 62 | config ARCH_SUPPORTS_UPROBES |
5a79859a | 63 | def_bool y |
2a0a5b22 | 64 | |
91d37211 HC |
65 | config DEBUG_RODATA |
66 | def_bool y | |
67 | ||
347a8dc3 | 68 | config S390 |
61d48c2c | 69 | def_bool y |
21266be9 | 70 | select ARCH_HAS_DEVMEM_IS_ALLOWED |
2b68f6ca | 71 | select ARCH_HAS_ELF_RANDOMIZE |
957e3fac | 72 | select ARCH_HAS_GCOV_PROFILE_ALL |
461a7184 | 73 | select ARCH_HAS_GIGANTIC_PAGE |
907fa061 | 74 | select ARCH_HAS_KCOV |
47523c98 | 75 | select ARCH_HAS_SG_CHAIN |
c42d8c7d | 76 | select ARCH_HAS_UBSAN_SANITIZE_ALL |
0e0d04a8 | 77 | select ARCH_HAVE_NMI_SAFE_CMPXCHG |
6beb0009 TG |
78 | select ARCH_INLINE_READ_LOCK |
79 | select ARCH_INLINE_READ_LOCK_BH | |
80 | select ARCH_INLINE_READ_LOCK_IRQ | |
81 | select ARCH_INLINE_READ_LOCK_IRQSAVE | |
0e0d04a8 | 82 | select ARCH_INLINE_READ_TRYLOCK |
6beb0009 TG |
83 | select ARCH_INLINE_READ_UNLOCK |
84 | select ARCH_INLINE_READ_UNLOCK_BH | |
85 | select ARCH_INLINE_READ_UNLOCK_IRQ | |
86 | select ARCH_INLINE_READ_UNLOCK_IRQRESTORE | |
0e0d04a8 HC |
87 | select ARCH_INLINE_SPIN_LOCK |
88 | select ARCH_INLINE_SPIN_LOCK_BH | |
89 | select ARCH_INLINE_SPIN_LOCK_IRQ | |
90 | select ARCH_INLINE_SPIN_LOCK_IRQSAVE | |
91 | select ARCH_INLINE_SPIN_TRYLOCK | |
92 | select ARCH_INLINE_SPIN_TRYLOCK_BH | |
93 | select ARCH_INLINE_SPIN_UNLOCK | |
94 | select ARCH_INLINE_SPIN_UNLOCK_BH | |
95 | select ARCH_INLINE_SPIN_UNLOCK_IRQ | |
96 | select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE | |
6beb0009 TG |
97 | select ARCH_INLINE_WRITE_LOCK |
98 | select ARCH_INLINE_WRITE_LOCK_BH | |
99 | select ARCH_INLINE_WRITE_LOCK_IRQ | |
100 | select ARCH_INLINE_WRITE_LOCK_IRQSAVE | |
0e0d04a8 | 101 | select ARCH_INLINE_WRITE_TRYLOCK |
6beb0009 TG |
102 | select ARCH_INLINE_WRITE_UNLOCK |
103 | select ARCH_INLINE_WRITE_UNLOCK_BH | |
104 | select ARCH_INLINE_WRITE_UNLOCK_IRQ | |
105 | select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE | |
0e0d04a8 | 106 | select ARCH_SAVE_PAGE_KEYS if HIBERNATION |
36e7fdaa | 107 | select ARCH_SUPPORTS_ATOMIC_RMW |
a763bc8b | 108 | select ARCH_SUPPORTS_NUMA_BALANCING |
295d8fa9 | 109 | select ARCH_USE_BUILTIN_BSWAP |
efc1d23b | 110 | select ARCH_USE_CMPXCHG_LOCKREF |
3f6813b9 | 111 | select ARCH_WANTS_DYNAMIC_TASK_STRUCT |
a763bc8b | 112 | select ARCH_WANTS_PROT_NUMA_PROT_NONE |
c42d8c7d | 113 | select ARCH_WANTS_UBSAN_NO_NULL |
c1d7e01d | 114 | select ARCH_WANT_IPC_PARSE_VERSION |
0e0d04a8 HC |
115 | select BUILDTIME_EXTABLE_SORT |
116 | select CLONE_BACKWARDS2 | |
5d6a0163 | 117 | select DYNAMIC_FTRACE if FUNCTION_TRACER |
0e0d04a8 | 118 | select GENERIC_CLOCKEVENTS |
8f00b3e2 | 119 | select GENERIC_CPU_AUTOPROBE |
0e0d04a8 | 120 | select GENERIC_CPU_DEVICES if !SMP |
746479cd | 121 | select GENERIC_FIND_FIRST_BIT |
e80e7813 | 122 | select GENERIC_SMP_IDLE_THREAD |
79c74ecb | 123 | select GENERIC_TIME_VSYSCALL |
0e0d04a8 | 124 | select HAVE_ALIGNED_STRUCT_PAGE if SLUB |
7a017721 | 125 | select HAVE_ARCH_AUDITSYSCALL |
a763bc8b | 126 | select HAVE_ARCH_EARLY_PFN_TO_NID |
97433ea4 | 127 | select HAVE_ARCH_HARDENED_USERCOPY |
5a79859a | 128 | select HAVE_ARCH_JUMP_LABEL |
fff7fb0b | 129 | select CPU_NO_EFFICIENT_FFS if !HAVE_MARCH_Z9_109_FEATURES |
c63cb468 | 130 | select HAVE_ARCH_SECCOMP_FILTER |
5614dd92 | 131 | select HAVE_ARCH_SOFT_DIRTY |
0e0d04a8 | 132 | select HAVE_ARCH_TRACEHOOK |
5a79859a | 133 | select HAVE_ARCH_TRANSPARENT_HUGEPAGE |
6077776b | 134 | select HAVE_EBPF_JIT if PACK_STACK && HAVE_MARCH_Z196_FEATURES |
0e0d04a8 HC |
135 | select HAVE_CMPXCHG_DOUBLE |
136 | select HAVE_CMPXCHG_LOCAL | |
0e0d04a8 | 137 | select HAVE_DEBUG_KMEMLEAK |
e82becfc | 138 | select HAVE_DMA_API_DEBUG |
e1231b0e | 139 | select HAVE_DMA_CONTIGUOUS |
5a79859a HC |
140 | select HAVE_DYNAMIC_FTRACE |
141 | select HAVE_DYNAMIC_FTRACE_WITH_REGS | |
9078a549 | 142 | select HAVE_EFFICIENT_UNALIGNED_ACCESS |
5f56a5df | 143 | select HAVE_EXIT_THREAD |
0e0d04a8 | 144 | select HAVE_FTRACE_MCOUNT_RECORD |
5a79859a HC |
145 | select HAVE_FUNCTION_GRAPH_TRACER |
146 | select HAVE_FUNCTION_TRACER | |
03b8c7b6 | 147 | select HAVE_FUTEX_CMPXCHG if FUTEX |
0e0d04a8 HC |
148 | select HAVE_KERNEL_BZIP2 |
149 | select HAVE_KERNEL_GZIP | |
8e2872ce | 150 | select HAVE_KERNEL_LZ4 |
0e0d04a8 HC |
151 | select HAVE_KERNEL_LZMA |
152 | select HAVE_KERNEL_LZO | |
153 | select HAVE_KERNEL_XZ | |
154 | select HAVE_KPROBES | |
155 | select HAVE_KRETPROBES | |
5a79859a | 156 | select HAVE_KVM |
21042d43 | 157 | select HAVE_LIVEPATCH |
0e0d04a8 HC |
158 | select HAVE_MEMBLOCK |
159 | select HAVE_MEMBLOCK_NODE_MAP | |
50be6345 | 160 | select HAVE_MEMBLOCK_PHYS_MAP |
786d35d4 | 161 | select HAVE_MOD_ARCH_SPECIFIC |
0e0d04a8 HC |
162 | select HAVE_OPROFILE |
163 | select HAVE_PERF_EVENTS | |
164 | select HAVE_REGS_AND_STACK_ACCESS_API | |
165 | select HAVE_SYSCALL_TRACEPOINTS | |
0e0d04a8 | 166 | select HAVE_VIRT_CPU_ACCOUNTING |
786d35d4 | 167 | select MODULES_USE_ELF_RELA |
50be6345 | 168 | select NO_BOOTMEM |
7eddd99c | 169 | select OLD_SIGACTION |
93bead43 | 170 | select OLD_SIGSUSPEND3 |
bb98f396 | 171 | select SPARSE_IRQ |
0e0d04a8 | 172 | select SYSCTL_EXCEPTION_TRACE |
d5c352cd | 173 | select THREAD_INFO_IN_TASK |
0563416b | 174 | select TTY |
0e0d04a8 | 175 | select VIRT_CPU_ACCOUNTING |
40565b5a | 176 | select ARCH_HAS_SCALED_CPUTIME |
93bead43 | 177 | select VIRT_TO_BUS |
42a0bb3f | 178 | select HAVE_NMI |
3a368f74 | 179 | |
1da177e4 | 180 | |
fca3e357 | 181 | config SCHED_OMIT_FRAME_POINTER |
6f9a3c33 | 182 | def_bool y |
fca3e357 | 183 | |
c81956c9 KS |
184 | config PGTABLE_LEVELS |
185 | int | |
c095a949 | 186 | default 4 |
c81956c9 | 187 | |
1da177e4 LT |
188 | source "init/Kconfig" |
189 | ||
dc52ddc0 MH |
190 | source "kernel/Kconfig.freezer" |
191 | ||
21042d43 JS |
192 | source "kernel/livepatch/Kconfig" |
193 | ||
843c48fd JG |
194 | menu "Processor type and features" |
195 | ||
196 | config HAVE_MARCH_Z900_FEATURES | |
197 | def_bool n | |
198 | ||
199 | config HAVE_MARCH_Z990_FEATURES | |
200 | def_bool n | |
201 | select HAVE_MARCH_Z900_FEATURES | |
202 | ||
203 | config HAVE_MARCH_Z9_109_FEATURES | |
204 | def_bool n | |
205 | select HAVE_MARCH_Z990_FEATURES | |
206 | ||
207 | config HAVE_MARCH_Z10_FEATURES | |
208 | def_bool n | |
209 | select HAVE_MARCH_Z9_109_FEATURES | |
210 | ||
211 | config HAVE_MARCH_Z196_FEATURES | |
212 | def_bool n | |
213 | select HAVE_MARCH_Z10_FEATURES | |
214 | ||
991c1505 HC |
215 | config HAVE_MARCH_ZEC12_FEATURES |
216 | def_bool n | |
217 | select HAVE_MARCH_Z196_FEATURES | |
218 | ||
f8b2dcbd MS |
219 | config HAVE_MARCH_Z13_FEATURES |
220 | def_bool n | |
221 | select HAVE_MARCH_ZEC12_FEATURES | |
222 | ||
843c48fd JG |
223 | choice |
224 | prompt "Processor type" | |
7072276e | 225 | default MARCH_Z196 |
1da177e4 | 226 | |
843c48fd JG |
227 | config MARCH_Z900 |
228 | bool "IBM zSeries model z800 and z900" | |
5a79859a | 229 | select HAVE_MARCH_Z900_FEATURES |
843c48fd JG |
230 | help |
231 | Select this to enable optimizations for model z800/z900 (2064 and | |
232 | 2066 series). This will enable some optimizations that are not | |
233 | available on older ESA/390 (31 Bit) only CPUs. | |
234 | ||
235 | config MARCH_Z990 | |
236 | bool "IBM zSeries model z890 and z990" | |
5a79859a | 237 | select HAVE_MARCH_Z990_FEATURES |
843c48fd JG |
238 | help |
239 | Select this to enable optimizations for model z890/z990 (2084 and | |
240 | 2086 series). The kernel will be slightly faster but will not work | |
241 | on older machines. | |
242 | ||
243 | config MARCH_Z9_109 | |
244 | bool "IBM System z9" | |
5a79859a | 245 | select HAVE_MARCH_Z9_109_FEATURES |
843c48fd JG |
246 | help |
247 | Select this to enable optimizations for IBM System z9 (2094 and | |
248 | 2096 series). The kernel will be slightly faster but will not work | |
249 | on older machines. | |
250 | ||
251 | config MARCH_Z10 | |
252 | bool "IBM System z10" | |
5a79859a | 253 | select HAVE_MARCH_Z10_FEATURES |
843c48fd JG |
254 | help |
255 | Select this to enable optimizations for IBM System z10 (2097 and | |
256 | 2098 series). The kernel will be slightly faster but will not work | |
257 | on older machines. | |
258 | ||
259 | config MARCH_Z196 | |
260 | bool "IBM zEnterprise 114 and 196" | |
5a79859a | 261 | select HAVE_MARCH_Z196_FEATURES |
843c48fd JG |
262 | help |
263 | Select this to enable optimizations for IBM zEnterprise 114 and 196 | |
264 | (2818 and 2817 series). The kernel will be slightly faster but will | |
265 | not work on older machines. | |
1da177e4 | 266 | |
991c1505 | 267 | config MARCH_ZEC12 |
59471227 | 268 | bool "IBM zBC12 and zEC12" |
5a79859a | 269 | select HAVE_MARCH_ZEC12_FEATURES |
991c1505 | 270 | help |
59471227 HC |
271 | Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and |
272 | 2827 series). The kernel will be slightly faster but will not work on | |
273 | older machines. | |
991c1505 | 274 | |
f8b2dcbd | 275 | config MARCH_Z13 |
bb3aa614 | 276 | bool "IBM z13s and z13" |
5a79859a | 277 | select HAVE_MARCH_Z13_FEATURES |
f8b2dcbd | 278 | help |
bb3aa614 HC |
279 | Select this to enable optimizations for IBM z13s and z13 (2965 and |
280 | 2964 series). The kernel will be slightly faster but will not work on | |
281 | older machines. | |
f8b2dcbd | 282 | |
843c48fd | 283 | endchoice |
1da177e4 | 284 | |
1db9e051 HC |
285 | config MARCH_Z900_TUNE |
286 | def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT | |
287 | ||
288 | config MARCH_Z990_TUNE | |
289 | def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT | |
290 | ||
291 | config MARCH_Z9_109_TUNE | |
292 | def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT | |
293 | ||
294 | config MARCH_Z10_TUNE | |
295 | def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT | |
296 | ||
297 | config MARCH_Z196_TUNE | |
298 | def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT | |
299 | ||
300 | config MARCH_ZEC12_TUNE | |
301 | def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT | |
302 | ||
f8b2dcbd MS |
303 | config MARCH_Z13_TUNE |
304 | def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT | |
305 | ||
1db9e051 HC |
306 | choice |
307 | prompt "Tune code generation" | |
308 | default TUNE_DEFAULT | |
309 | help | |
310 | Cause the compiler to tune (-mtune) the generated code for a machine. | |
311 | This will make the code run faster on the selected machine but | |
312 | somewhat slower on other machines. | |
313 | This option only changes how the compiler emits instructions, not the | |
314 | selection of instructions itself, so the resulting kernel will run on | |
315 | all other machines. | |
316 | ||
317 | config TUNE_DEFAULT | |
318 | bool "Default" | |
319 | help | |
320 | Tune the generated code for the target processor for which the kernel | |
321 | will be compiled. | |
322 | ||
1db9e051 HC |
323 | config TUNE_Z900 |
324 | bool "IBM zSeries model z800 and z900" | |
325 | ||
326 | config TUNE_Z990 | |
327 | bool "IBM zSeries model z890 and z990" | |
328 | ||
329 | config TUNE_Z9_109 | |
330 | bool "IBM System z9" | |
331 | ||
332 | config TUNE_Z10 | |
333 | bool "IBM System z10" | |
334 | ||
335 | config TUNE_Z196 | |
336 | bool "IBM zEnterprise 114 and 196" | |
337 | ||
338 | config TUNE_ZEC12 | |
339 | bool "IBM zBC12 and zEC12" | |
340 | ||
f8b2dcbd MS |
341 | config TUNE_Z13 |
342 | bool "IBM z13" | |
343 | ||
1db9e051 HC |
344 | endchoice |
345 | ||
347a8dc3 | 346 | config 64BIT |
6f9a3c33 | 347 | def_bool y |
d9f7a745 | 348 | |
843c48fd JG |
349 | config COMPAT |
350 | def_bool y | |
351 | prompt "Kernel support for 31 bit emulation" | |
843c48fd JG |
352 | select COMPAT_BINFMT_ELF if BINFMT_ELF |
353 | select ARCH_WANT_OLD_COMPAT_IPC | |
7eddd99c | 354 | select COMPAT_OLD_SIGACTION |
2813893f | 355 | depends on MULTIUSER |
843c48fd JG |
356 | help |
357 | Select this option if you want to enable your system kernel to | |
358 | handle system-calls from ELF binaries for 31 bit ESA. This option | |
359 | (and some other stuff like libraries and such) is needed for | |
360 | executing 31 bit applications. It is safe to say "Y". | |
361 | ||
362 | config SYSVIPC_COMPAT | |
363 | def_bool y if COMPAT && SYSVIPC | |
364 | ||
365 | config KEYS_COMPAT | |
366 | def_bool y if COMPAT && KEYS | |
367 | ||
1da177e4 | 368 | config SMP |
6f9a3c33 MS |
369 | def_bool y |
370 | prompt "Symmetric multi-processing support" | |
1da177e4 LT |
371 | ---help--- |
372 | This enables support for systems with more than one CPU. If you have | |
373 | a system with only one CPU, like most personal computers, say N. If | |
374 | you have a system with more than one CPU, say Y. | |
375 | ||
4a474157 | 376 | If you say N here, the kernel will run on uni- and multiprocessor |
1da177e4 LT |
377 | machines, but will use only one CPU of a multiprocessor machine. If |
378 | you say Y here, the kernel will run on many, but not all, | |
4a474157 | 379 | uniprocessor machines. On a uniprocessor machine, the kernel |
1da177e4 LT |
380 | will run faster if you say N here. |
381 | ||
03502faa AB |
382 | See also the SMP-HOWTO available at |
383 | <http://www.tldp.org/docs.html#howto>. | |
1da177e4 LT |
384 | |
385 | Even if you don't know what to do here, say Y. | |
386 | ||
387 | config NR_CPUS | |
5c75a0da HC |
388 | int "Maximum number of CPUs (2-512)" |
389 | range 2 512 | |
1da177e4 | 390 | depends on SMP |
5a79859a | 391 | default "64" |
1da177e4 LT |
392 | help |
393 | This allows you to specify the maximum number of CPUs which this | |
5c75a0da | 394 | kernel will support. The maximum supported value is 512 and the |
1da177e4 LT |
395 | minimum value which makes sense is 2. |
396 | ||
397 | This is purely to save memory - each supported CPU adds | |
398 | approximately sixteen kilobytes to the kernel image. | |
399 | ||
400 | config HOTPLUG_CPU | |
6f9a3c33 MS |
401 | def_bool y |
402 | prompt "Support for hot-pluggable CPUs" | |
1da177e4 | 403 | depends on SMP |
1da177e4 LT |
404 | help |
405 | Say Y here to be able to turn CPUs off and on. CPUs | |
406 | can be controlled through /sys/devices/system/cpu/cpu#. | |
407 | Say N if you want to disable CPU hotplug. | |
408 | ||
3a368f74 PH |
409 | # Some NUMA nodes have memory ranges that span |
410 | # other nodes. Even though a pfn is valid and | |
411 | # between a node's start and end pfns, it may not | |
412 | # reside on that node. See memmap_init_zone() | |
413 | # for details. <- They meant memory holes! | |
414 | config NODES_SPAN_OTHER_NODES | |
415 | def_bool NUMA | |
416 | ||
417 | config NUMA | |
418 | bool "NUMA support" | |
c095a949 | 419 | depends on SMP && SCHED_TOPOLOGY |
3a368f74 PH |
420 | default n |
421 | help | |
422 | Enable NUMA support | |
423 | ||
424 | This option adds NUMA support to the kernel. | |
425 | ||
426 | An operation mode can be selected by appending | |
427 | numa=<method> to the kernel command line. | |
428 | ||
429 | The default behaviour is identical to appending numa=plain to | |
430 | the command line. This will create just one node with all | |
431 | available memory and all CPUs in it. | |
432 | ||
433 | config NODES_SHIFT | |
434 | int "Maximum NUMA nodes (as a power of 2)" | |
435 | range 1 10 | |
436 | depends on NUMA | |
437 | default "4" | |
438 | help | |
439 | Specify the maximum number of NUMA nodes available on the target | |
440 | system. Increases memory reserved to accommodate various tables. | |
441 | ||
c29a7baf MH |
442 | menu "Select NUMA modes" |
443 | depends on NUMA | |
444 | ||
445 | config NUMA_EMU | |
446 | bool "NUMA emulation" | |
447 | default y | |
448 | help | |
449 | Numa emulation mode will split the available system memory into | |
450 | equal chunks which then are distributed over the configured number | |
451 | of nodes in a round-robin manner. | |
452 | ||
453 | The number of fake nodes is limited by the number of available memory | |
454 | chunks (i.e. memory size / fake size) and the number of supported | |
455 | nodes in the kernel. | |
456 | ||
457 | The CPUs are assigned to the nodes in a way that partially respects | |
458 | the original machine topology (if supported by the machine). | |
459 | Fair distribution of the CPUs is not guaranteed. | |
460 | ||
461 | config EMU_SIZE | |
462 | hex "NUMA emulation memory chunk size" | |
463 | default 0x10000000 | |
464 | range 0x400000 0x100000000 | |
465 | depends on NUMA_EMU | |
466 | help | |
467 | Select the default size by which the memory is chopped and then | |
468 | assigned to emulated NUMA nodes. | |
469 | ||
470 | This can be overridden by specifying | |
471 | ||
472 | emu_size=<n> | |
473 | ||
474 | on the kernel command line where also suffixes K, M, G, and T are | |
475 | supported. | |
476 | ||
477 | endmenu | |
9236b4dd HC |
478 | |
479 | config SCHED_SMT | |
480 | def_bool n | |
c29a7baf | 481 | |
8d11e021 | 482 | config SCHED_MC |
83a24e32 | 483 | def_bool n |
8d11e021 | 484 | |
4cb14bc8 | 485 | config SCHED_BOOK |
10ad34bc MS |
486 | def_bool n |
487 | ||
adac0f1e HC |
488 | config SCHED_DRAWER |
489 | def_bool n | |
490 | ||
10ad34bc | 491 | config SCHED_TOPOLOGY |
6f9a3c33 | 492 | def_bool y |
10ad34bc | 493 | prompt "Topology scheduler support" |
83a24e32 | 494 | depends on SMP |
10ad34bc | 495 | select SCHED_SMT |
83a24e32 | 496 | select SCHED_MC |
10ad34bc | 497 | select SCHED_BOOK |
adac0f1e | 498 | select SCHED_DRAWER |
4cb14bc8 | 499 | help |
10ad34bc MS |
500 | Topology scheduler support improves the CPU scheduler's decision |
501 | making when dealing with machines that have multi-threading, | |
502 | multiple cores or multiple books. | |
4cb14bc8 | 503 | |
843c48fd JG |
504 | source kernel/Kconfig.preempt |
505 | ||
843c48fd | 506 | source kernel/Kconfig.hz |
1da177e4 | 507 | |
843c48fd | 508 | endmenu |
1da177e4 | 509 | |
843c48fd | 510 | menu "Memory setup" |
1d057720 | 511 | |
843c48fd | 512 | config ARCH_SPARSEMEM_ENABLE |
6f9a3c33 | 513 | def_bool y |
843c48fd JG |
514 | select SPARSEMEM_VMEMMAP_ENABLE |
515 | select SPARSEMEM_VMEMMAP | |
e65e1fc2 | 516 | |
843c48fd JG |
517 | config ARCH_SPARSEMEM_DEFAULT |
518 | def_bool y | |
1da177e4 | 519 | |
843c48fd JG |
520 | config ARCH_SELECT_MEMORY_MODEL |
521 | def_bool y | |
1da177e4 | 522 | |
843c48fd JG |
523 | config ARCH_ENABLE_MEMORY_HOTPLUG |
524 | def_bool y if SPARSEMEM | |
0efa4703 | 525 | |
843c48fd JG |
526 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
527 | def_bool y | |
e37f50e1 | 528 | |
ec66ad66 MS |
529 | config ARCH_ENABLE_SPLIT_PMD_PTLOCK |
530 | def_bool y | |
ec66ad66 | 531 | |
843c48fd JG |
532 | config FORCE_MAX_ZONEORDER |
533 | int | |
534 | default "9" | |
f861e405 | 535 | |
843c48fd | 536 | source "mm/Kconfig" |
1da177e4 LT |
537 | |
538 | config PACK_STACK | |
6f9a3c33 MS |
539 | def_bool y |
540 | prompt "Pack kernel stack" | |
1da177e4 LT |
541 | help |
542 | This option enables the compiler option -mkernel-backchain if it | |
543 | is available. If the option is available the compiler supports | |
544 | the new stack layout which dramatically reduces the minimum stack | |
545 | frame size. With an old compiler a non-leaf function needs a | |
546 | minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With | |
547 | -mkernel-backchain the minimum size drops to 16 byte on 31 bit | |
548 | and 24 byte on 64 bit. | |
549 | ||
550 | Say Y if you are unsure. | |
551 | ||
1da177e4 | 552 | config CHECK_STACK |
6f9a3c33 MS |
553 | def_bool y |
554 | prompt "Detect kernel stack overflow" | |
1da177e4 LT |
555 | help |
556 | This option enables the compiler option -mstack-guard and | |
557 | -mstack-size if they are available. If the compiler supports them | |
558 | it will emit additional code to each function prolog to trigger | |
559 | an illegal operation if the kernel stack is about to overflow. | |
560 | ||
561 | Say N if you are unsure. | |
562 | ||
563 | config STACK_GUARD | |
564 | int "Size of the guard area (128-1024)" | |
565 | range 128 1024 | |
566 | depends on CHECK_STACK | |
567 | default "256" | |
568 | help | |
569 | This allows you to specify the size of the guard area at the lower | |
570 | end of the kernel stack. If the kernel stack points into the guard | |
571 | area on function entry an illegal operation is triggered. The size | |
572 | needs to be a power of 2. Please keep in mind that the size of an | |
573 | interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit. | |
574 | The minimum size for the stack guard should be 256 for 31 bit and | |
575 | 512 for 64 bit. | |
576 | ||
2c190da4 | 577 | config WARN_DYNAMIC_STACK |
6f9a3c33 | 578 | def_bool n |
2c190da4 | 579 | prompt "Emit compiler warnings for function with dynamic stack usage" |
1da177e4 | 580 | help |
2c190da4 JG |
581 | This option enables the compiler option -mwarn-dynamicstack. If the |
582 | compiler supports this options generates warnings for functions | |
583 | that dynamically allocate stack space using alloca. | |
1da177e4 LT |
584 | |
585 | Say N if you are unsure. | |
586 | ||
843c48fd | 587 | endmenu |
3f22ab27 | 588 | |
843c48fd | 589 | menu "I/O subsystem" |
1da177e4 | 590 | |
1da177e4 | 591 | config QDIO |
6f9a3c33 MS |
592 | def_tristate y |
593 | prompt "QDIO support" | |
1da177e4 | 594 | ---help--- |
8129ee16 | 595 | This driver provides the Queued Direct I/O base support for |
efca13bc | 596 | IBM System z. |
1da177e4 LT |
597 | |
598 | To compile this driver as a module, choose M here: the | |
599 | module will be called qdio. | |
600 | ||
601 | If unsure, say Y. | |
602 | ||
c8717a3d JG |
603 | menuconfig PCI |
604 | bool "PCI support" | |
c8717a3d | 605 | select PCI_MSI |
8128f23c | 606 | select IOMMU_SUPPORT |
c8717a3d JG |
607 | help |
608 | Enable PCI support. | |
609 | ||
610 | if PCI | |
611 | ||
612 | config PCI_NR_FUNCTIONS | |
613 | int "Maximum number of PCI functions (1-4096)" | |
614 | range 1 4096 | |
615 | default "64" | |
616 | help | |
617 | This allows you to specify the maximum number of PCI functions which | |
618 | this kernel will support. | |
619 | ||
620 | source "drivers/pci/Kconfig" | |
c8717a3d JG |
621 | |
622 | endif # PCI | |
623 | ||
624 | config PCI_DOMAINS | |
625 | def_bool PCI | |
626 | ||
627 | config HAS_IOMEM | |
628 | def_bool PCI | |
629 | ||
630 | config IOMMU_HELPER | |
631 | def_bool PCI | |
632 | ||
c8717a3d JG |
633 | config NEED_SG_DMA_LENGTH |
634 | def_bool PCI | |
635 | ||
91630032 JG |
636 | config NEED_DMA_MAP_STATE |
637 | def_bool PCI | |
638 | ||
9d92a7e1 | 639 | config CHSC_SCH |
d9c11b1e | 640 | def_tristate m |
6f9a3c33 | 641 | prompt "Support for CHSC subchannels" |
9d92a7e1 CH |
642 | help |
643 | This driver allows usage of CHSC subchannels. A CHSC subchannel | |
644 | is usually present on LPAR only. | |
645 | The driver creates a device /dev/chsc, which may be used to | |
646 | obtain I/O configuration information about the machine and | |
647 | to issue asynchronous chsc commands (DANGEROUS). | |
648 | You will usually only want to use this interface on a special | |
649 | LPAR designated for system management. | |
650 | ||
651 | To compile this driver as a module, choose M here: the | |
652 | module will be called chsc_sch. | |
653 | ||
654 | If unsure, say N. | |
655 | ||
1d1c8f78 SO |
656 | config SCM_BUS |
657 | def_bool y | |
1d1c8f78 SO |
658 | prompt "SCM bus driver" |
659 | help | |
660 | Bus driver for Storage Class Memory. | |
661 | ||
eadb86ab SO |
662 | config EADM_SCH |
663 | def_tristate m | |
664 | prompt "Support for EADM subchannels" | |
665 | depends on SCM_BUS | |
666 | help | |
667 | This driver allows usage of EADM subchannels. EADM subchannels act | |
668 | as a communication vehicle for SCM increments. | |
669 | ||
670 | To compile this driver as a module, choose M here: the | |
671 | module will be called eadm_sch. | |
672 | ||
843c48fd JG |
673 | endmenu |
674 | ||
675 | menu "Dump support" | |
676 | ||
677 | config CRASH_DUMP | |
678 | bool "kernel crash dumps" | |
5a79859a | 679 | depends on SMP |
843c48fd JG |
680 | select KEXEC |
681 | help | |
682 | Generate crash dump after being started by kexec. | |
683 | Crash dump kernels are loaded in the main kernel with kexec-tools | |
684 | into a specially reserved region and then later executed after | |
685 | a crash by kdump/kexec. | |
843c48fd | 686 | Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this. |
bf28a597 MH |
687 | This option also enables s390 zfcpdump. |
688 | See also <file:Documentation/s390/zfcpdump.txt> | |
843c48fd JG |
689 | |
690 | endmenu | |
691 | ||
692 | menu "Executable file formats / Emulations" | |
1da177e4 | 693 | |
1da177e4 LT |
694 | source "fs/Kconfig.binfmt" |
695 | ||
843c48fd JG |
696 | config SECCOMP |
697 | def_bool y | |
698 | prompt "Enable seccomp to safely compute untrusted bytecode" | |
699 | depends on PROC_FS | |
700 | help | |
701 | This kernel feature is useful for number crunching applications | |
702 | that may need to compute untrusted bytecode during their | |
703 | execution. By using pipes or other transports made available to | |
704 | the process as file descriptors supporting the read/write | |
705 | syscalls, it's possible to isolate those applications in | |
706 | their own address space using seccomp. Once seccomp is | |
707 | enabled via /proc/<pid>/seccomp, it cannot be disabled | |
708 | and the task is only allowed to execute a few safe syscalls | |
709 | defined by each seccomp mode. | |
710 | ||
711 | If unsure, say Y. | |
712 | ||
713 | endmenu | |
714 | ||
715 | menu "Power Management" | |
716 | ||
717 | config ARCH_HIBERNATION_POSSIBLE | |
5a79859a | 718 | def_bool y |
843c48fd JG |
719 | |
720 | source "kernel/power/Kconfig" | |
721 | ||
722 | endmenu | |
723 | ||
724 | source "net/Kconfig" | |
725 | ||
726 | config PCMCIA | |
727 | def_bool n | |
728 | ||
729 | config CCW | |
730 | def_bool y | |
731 | ||
732 | source "drivers/Kconfig" | |
733 | ||
734 | source "fs/Kconfig" | |
735 | ||
736 | source "arch/s390/Kconfig.debug" | |
737 | ||
738 | source "security/Kconfig" | |
739 | ||
740 | source "crypto/Kconfig" | |
741 | ||
742 | source "lib/Kconfig" | |
743 | ||
744 | menu "Virtualization" | |
684de39b | 745 | |
1da177e4 | 746 | config PFAULT |
6f9a3c33 MS |
747 | def_bool y |
748 | prompt "Pseudo page fault support" | |
1da177e4 LT |
749 | help |
750 | Select this option, if you want to use PFAULT pseudo page fault | |
751 | handling under VM. If running native or in LPAR, this option | |
752 | has no effect. If your VM does not support PFAULT, PAGEEX | |
753 | pseudo page fault handling will be used. | |
754 | Note that VM 4.2 supports PFAULT but has a bug in its | |
755 | implementation that causes some problems. | |
756 | Everybody who wants to run Linux under VM != VM4.2 should select | |
757 | this option. | |
758 | ||
759 | config SHARED_KERNEL | |
0eccc783 HC |
760 | bool "VM shared kernel support" |
761 | depends on !JUMP_LABEL | |
1da177e4 LT |
762 | help |
763 | Select this option, if you want to share the text segment of the | |
764 | Linux kernel between different VM guests. This reduces memory | |
765 | usage with lots of guests but greatly increases kernel size. | |
9c9c1761 HC |
766 | Also if a kernel was IPL'ed from a shared segment the kexec system |
767 | call will not work. | |
1da177e4 LT |
768 | You should only select this option if you know what you are |
769 | doing and want to exploit this feature. | |
770 | ||
771 | config CMM | |
6f9a3c33 MS |
772 | def_tristate n |
773 | prompt "Cooperative memory management" | |
1da177e4 LT |
774 | help |
775 | Select this option, if you want to enable the kernel interface | |
776 | to reduce the memory size of the system. This is accomplished | |
777 | by allocating pages of memory and put them "on hold". This only | |
778 | makes sense for a system running under VM where the unused pages | |
779 | will be reused by VM for other guest systems. The interface | |
780 | allows an external monitor to balance memory of many systems. | |
781 | Everybody who wants to run Linux under VM should select this | |
782 | option. | |
783 | ||
1da177e4 | 784 | config CMM_IUCV |
6f9a3c33 MS |
785 | def_bool y |
786 | prompt "IUCV special message interface to cooperative memory management" | |
1da177e4 LT |
787 | depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV) |
788 | help | |
789 | Select this option to enable the special message interface to | |
790 | the cooperative memory management. | |
791 | ||
1da177e4 | 792 | config APPLDATA_BASE |
6f9a3c33 MS |
793 | def_bool n |
794 | prompt "Linux - VM Monitor Stream, base infrastructure" | |
c185b783 | 795 | depends on PROC_FS |
1da177e4 LT |
796 | help |
797 | This provides a kernel interface for creating and updating z/VM APPLDATA | |
798 | monitor records. The monitor records are updated at certain time | |
799 | intervals, once the timer is started. | |
800 | Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer, | |
801 | i.e. enables or disables monitoring on the Linux side. | |
802 | A custom interval value (in seconds) can be written to | |
803 | /proc/appldata/interval. | |
804 | ||
805 | Defaults are 60 seconds interval and timer off. | |
806 | The /proc entries can also be read from, showing the current settings. | |
807 | ||
808 | config APPLDATA_MEM | |
6f9a3c33 MS |
809 | def_tristate m |
810 | prompt "Monitor memory management statistics" | |
62fb2ba3 | 811 | depends on APPLDATA_BASE && VM_EVENT_COUNTERS |
1da177e4 LT |
812 | help |
813 | This provides memory management related data to the Linux - VM Monitor | |
814 | Stream, like paging/swapping rate, memory utilisation, etc. | |
815 | Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM | |
816 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
817 | on the z/VM side. | |
818 | ||
819 | Default is disabled. | |
820 | The /proc entry can also be read from, showing the current settings. | |
821 | ||
822 | This can also be compiled as a module, which will be called | |
823 | appldata_mem.o. | |
824 | ||
825 | config APPLDATA_OS | |
6f9a3c33 MS |
826 | def_tristate m |
827 | prompt "Monitor OS statistics" | |
1da177e4 LT |
828 | depends on APPLDATA_BASE |
829 | help | |
830 | This provides OS related data to the Linux - VM Monitor Stream, like | |
831 | CPU utilisation, etc. | |
832 | Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM | |
833 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
834 | on the z/VM side. | |
835 | ||
836 | Default is disabled. | |
837 | This can also be compiled as a module, which will be called | |
838 | appldata_os.o. | |
839 | ||
840 | config APPLDATA_NET_SUM | |
6f9a3c33 MS |
841 | def_tristate m |
842 | prompt "Monitor overall network statistics" | |
70193af9 | 843 | depends on APPLDATA_BASE && NET |
1da177e4 LT |
844 | help |
845 | This provides network related data to the Linux - VM Monitor Stream, | |
846 | currently there is only a total sum of network I/O statistics, no | |
847 | per-interface data. | |
848 | Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM | |
849 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
850 | on the z/VM side. | |
851 | ||
852 | Default is disabled. | |
853 | This can also be compiled as a module, which will be called | |
854 | appldata_net_sum.o. | |
855 | ||
24bbb1fa | 856 | config S390_HYPFS_FS |
6f9a3c33 MS |
857 | def_bool y |
858 | prompt "s390 hypervisor file system support" | |
24bbb1fa | 859 | select SYS_HYPERVISOR |
24bbb1fa MH |
860 | help |
861 | This is a virtual file system intended to provide accounting | |
862 | information in an s390 hypervisor environment. | |
863 | ||
843c48fd | 864 | source "arch/s390/kvm/Kconfig" |
411ed322 | 865 | |
fa587743 | 866 | config S390_GUEST |
6f9a3c33 | 867 | def_bool y |
510cf5a6 | 868 | prompt "s390 support for virtio devices" |
79b6f7fb | 869 | select TTY |
80629b0b | 870 | select VIRTUALIZATION |
fa587743 | 871 | select VIRTIO |
faeba830 | 872 | select VIRTIO_CONSOLE |
fa587743 | 873 | help |
bdd1fc27 CH |
874 | Enabling this option adds support for virtio based paravirtual device |
875 | drivers on s390. | |
1da177e4 | 876 | |
20766c08 | 877 | Select this option if you want to run the kernel as a guest under |
bdd1fc27 | 878 | the KVM hypervisor. |
155af2f9 | 879 | |
3b2fbb3f CH |
880 | config S390_GUEST_OLD_TRANSPORT |
881 | def_bool y | |
882 | prompt "Guest support for old s390 virtio transport (DEPRECATED)" | |
883 | depends on S390_GUEST | |
884 | help | |
885 | Enable this option to add support for the old s390-virtio | |
886 | transport (i.e. virtio devices NOT based on virtio-ccw). This | |
887 | type of virtio devices is only available on the experimental | |
888 | kuli userspace or with old (< 2.6) qemu. If you are running | |
889 | with a modern version of qemu (which supports virtio-ccw since | |
890 | 1.4 and uses it by default since version 2.4), you probably won't | |
891 | need this. | |
892 | ||
155af2f9 | 893 | endmenu |