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Commit | Line | Data |
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b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
1da177e4 | 2 | config MMU |
61d48c2c | 3 | def_bool y |
1da177e4 | 4 | |
66701b14 | 5 | config ZONE_DMA |
69dbb2f7 | 6 | def_bool y |
66701b14 | 7 | |
2fd92273 HC |
8 | config CPU_BIG_ENDIAN |
9 | def_bool y | |
10 | ||
2b105ff9 | 11 | config LOCKDEP_SUPPORT |
61d48c2c | 12 | def_bool y |
2b105ff9 | 13 | |
5bdc9b44 | 14 | config STACKTRACE_SUPPORT |
61d48c2c | 15 | def_bool y |
5bdc9b44 | 16 | |
1da177e4 LT |
17 | config RWSEM_GENERIC_SPINLOCK |
18 | bool | |
19 | ||
20 | config RWSEM_XCHGADD_ALGORITHM | |
61d48c2c | 21 | def_bool y |
1da177e4 | 22 | |
f0d1b0b3 | 23 | config ARCH_HAS_ILOG2_U32 |
6f9a3c33 | 24 | def_bool n |
f0d1b0b3 DH |
25 | |
26 | config ARCH_HAS_ILOG2_U64 | |
6f9a3c33 | 27 | def_bool n |
f0d1b0b3 | 28 | |
7e33db4e | 29 | config GENERIC_HWEIGHT |
61d48c2c | 30 | def_bool y |
7e33db4e | 31 | |
c0007f1a | 32 | config GENERIC_BUG |
6f9a3c33 | 33 | def_bool y if BUG |
c0007f1a | 34 | |
52499f40 HC |
35 | config GENERIC_BUG_RELATIVE_POINTERS |
36 | def_bool y | |
37 | ||
eca577ef | 38 | config ARCH_DMA_ADDR_T_64BIT |
5a79859a | 39 | def_bool y |
eca577ef | 40 | |
b6b40c53 | 41 | config GENERIC_LOCKBREAK |
6f9a3c33 | 42 | def_bool y if SMP && PREEMPT |
b6b40c53 | 43 | |
402b0862 | 44 | config PGSTE |
6f9a3c33 | 45 | def_bool y if KVM |
402b0862 | 46 | |
6a11f75b AM |
47 | config ARCH_SUPPORTS_DEBUG_PAGEALLOC |
48 | def_bool y | |
49 | ||
843c48fd JG |
50 | config KEXEC |
51 | def_bool y | |
2965faa5 | 52 | select KEXEC_CORE |
843c48fd JG |
53 | |
54 | config AUDIT_ARCH | |
55 | def_bool y | |
56 | ||
ce816fa8 | 57 | config NO_IOPORT_MAP |
c8717a3d JG |
58 | def_bool y |
59 | ||
60 | config PCI_QUIRKS | |
61 | def_bool n | |
62 | ||
2a0a5b22 | 63 | config ARCH_SUPPORTS_UPROBES |
5a79859a | 64 | def_bool y |
2a0a5b22 | 65 | |
347a8dc3 | 66 | config S390 |
61d48c2c | 67 | def_bool y |
23fefe11 | 68 | select ARCH_BINFMT_ELF_STATE |
21266be9 | 69 | select ARCH_HAS_DEVMEM_IS_ALLOWED |
2b68f6ca | 70 | select ARCH_HAS_ELF_RANDOMIZE |
957e3fac | 71 | select ARCH_HAS_GCOV_PROFILE_ALL |
e1073d1e | 72 | select ARCH_HAS_GIGANTIC_PAGE if (MEMORY_ISOLATION && COMPACTION) || CMA |
907fa061 | 73 | select ARCH_HAS_KCOV |
d2852a22 | 74 | select ARCH_HAS_SET_MEMORY |
47523c98 | 75 | select ARCH_HAS_SG_CHAIN |
ad21fc4f LA |
76 | select ARCH_HAS_STRICT_KERNEL_RWX |
77 | select ARCH_HAS_STRICT_MODULE_RWX | |
c42d8c7d | 78 | select ARCH_HAS_UBSAN_SANITIZE_ALL |
0e0d04a8 | 79 | select ARCH_HAVE_NMI_SAFE_CMPXCHG |
6beb0009 TG |
80 | select ARCH_INLINE_READ_LOCK |
81 | select ARCH_INLINE_READ_LOCK_BH | |
82 | select ARCH_INLINE_READ_LOCK_IRQ | |
83 | select ARCH_INLINE_READ_LOCK_IRQSAVE | |
0e0d04a8 | 84 | select ARCH_INLINE_READ_TRYLOCK |
6beb0009 TG |
85 | select ARCH_INLINE_READ_UNLOCK |
86 | select ARCH_INLINE_READ_UNLOCK_BH | |
87 | select ARCH_INLINE_READ_UNLOCK_IRQ | |
88 | select ARCH_INLINE_READ_UNLOCK_IRQRESTORE | |
0e0d04a8 HC |
89 | select ARCH_INLINE_SPIN_LOCK |
90 | select ARCH_INLINE_SPIN_LOCK_BH | |
91 | select ARCH_INLINE_SPIN_LOCK_IRQ | |
92 | select ARCH_INLINE_SPIN_LOCK_IRQSAVE | |
93 | select ARCH_INLINE_SPIN_TRYLOCK | |
94 | select ARCH_INLINE_SPIN_TRYLOCK_BH | |
95 | select ARCH_INLINE_SPIN_UNLOCK | |
96 | select ARCH_INLINE_SPIN_UNLOCK_BH | |
97 | select ARCH_INLINE_SPIN_UNLOCK_IRQ | |
98 | select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE | |
6beb0009 TG |
99 | select ARCH_INLINE_WRITE_LOCK |
100 | select ARCH_INLINE_WRITE_LOCK_BH | |
101 | select ARCH_INLINE_WRITE_LOCK_IRQ | |
102 | select ARCH_INLINE_WRITE_LOCK_IRQSAVE | |
0e0d04a8 | 103 | select ARCH_INLINE_WRITE_TRYLOCK |
6beb0009 TG |
104 | select ARCH_INLINE_WRITE_UNLOCK |
105 | select ARCH_INLINE_WRITE_UNLOCK_BH | |
106 | select ARCH_INLINE_WRITE_UNLOCK_IRQ | |
107 | select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE | |
0e0d04a8 | 108 | select ARCH_SAVE_PAGE_KEYS if HIBERNATION |
36e7fdaa | 109 | select ARCH_SUPPORTS_ATOMIC_RMW |
fd15a1f3 | 110 | select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT |
a763bc8b | 111 | select ARCH_SUPPORTS_NUMA_BALANCING |
295d8fa9 | 112 | select ARCH_USE_BUILTIN_BSWAP |
efc1d23b | 113 | select ARCH_USE_CMPXCHG_LOCKREF |
3f6813b9 | 114 | select ARCH_WANTS_DYNAMIC_TASK_STRUCT |
a763bc8b | 115 | select ARCH_WANTS_PROT_NUMA_PROT_NONE |
c42d8c7d | 116 | select ARCH_WANTS_UBSAN_NO_NULL |
c1d7e01d | 117 | select ARCH_WANT_IPC_PARSE_VERSION |
0e0d04a8 HC |
118 | select BUILDTIME_EXTABLE_SORT |
119 | select CLONE_BACKWARDS2 | |
5d6a0163 | 120 | select DYNAMIC_FTRACE if FUNCTION_TRACER |
0e0d04a8 | 121 | select GENERIC_CLOCKEVENTS |
8f00b3e2 | 122 | select GENERIC_CPU_AUTOPROBE |
0e0d04a8 | 123 | select GENERIC_CPU_DEVICES if !SMP |
746479cd | 124 | select GENERIC_FIND_FIRST_BIT |
e80e7813 | 125 | select GENERIC_SMP_IDLE_THREAD |
79c74ecb | 126 | select GENERIC_TIME_VSYSCALL |
0e0d04a8 | 127 | select HAVE_ALIGNED_STRUCT_PAGE if SLUB |
7a017721 | 128 | select HAVE_ARCH_AUDITSYSCALL |
5a79859a | 129 | select HAVE_ARCH_JUMP_LABEL |
fff7fb0b | 130 | select CPU_NO_EFFICIENT_FFS if !HAVE_MARCH_Z9_109_FEATURES |
c63cb468 | 131 | select HAVE_ARCH_SECCOMP_FILTER |
5614dd92 | 132 | select HAVE_ARCH_SOFT_DIRTY |
0e0d04a8 | 133 | select HAVE_ARCH_TRACEHOOK |
5a79859a | 134 | select HAVE_ARCH_TRANSPARENT_HUGEPAGE |
6077776b | 135 | select HAVE_EBPF_JIT if PACK_STACK && HAVE_MARCH_Z196_FEATURES |
0e0d04a8 HC |
136 | select HAVE_CMPXCHG_DOUBLE |
137 | select HAVE_CMPXCHG_LOCAL | |
f50c0e63 | 138 | select HAVE_COPY_THREAD_TLS |
0e0d04a8 | 139 | select HAVE_DEBUG_KMEMLEAK |
e82becfc | 140 | select HAVE_DMA_API_DEBUG |
e1231b0e | 141 | select HAVE_DMA_CONTIGUOUS |
7844572c | 142 | select DMA_NOOP_OPS |
5a79859a HC |
143 | select HAVE_DYNAMIC_FTRACE |
144 | select HAVE_DYNAMIC_FTRACE_WITH_REGS | |
9078a549 | 145 | select HAVE_EFFICIENT_UNALIGNED_ACCESS |
5f56a5df | 146 | select HAVE_EXIT_THREAD |
0e0d04a8 | 147 | select HAVE_FTRACE_MCOUNT_RECORD |
5a79859a HC |
148 | select HAVE_FUNCTION_GRAPH_TRACER |
149 | select HAVE_FUNCTION_TRACER | |
03b8c7b6 | 150 | select HAVE_FUTEX_CMPXCHG if FUTEX |
0e0d04a8 HC |
151 | select HAVE_KERNEL_BZIP2 |
152 | select HAVE_KERNEL_GZIP | |
8e2872ce | 153 | select HAVE_KERNEL_LZ4 |
0e0d04a8 HC |
154 | select HAVE_KERNEL_LZMA |
155 | select HAVE_KERNEL_LZO | |
156 | select HAVE_KERNEL_XZ | |
157 | select HAVE_KPROBES | |
158 | select HAVE_KRETPROBES | |
5a79859a | 159 | select HAVE_KVM |
21042d43 | 160 | select HAVE_LIVEPATCH |
0e0d04a8 HC |
161 | select HAVE_MEMBLOCK |
162 | select HAVE_MEMBLOCK_NODE_MAP | |
50be6345 | 163 | select HAVE_MEMBLOCK_PHYS_MAP |
786d35d4 | 164 | select HAVE_MOD_ARCH_SPECIFIC |
0e0d04a8 HC |
165 | select HAVE_OPROFILE |
166 | select HAVE_PERF_EVENTS | |
167 | select HAVE_REGS_AND_STACK_ACCESS_API | |
168 | select HAVE_SYSCALL_TRACEPOINTS | |
0e0d04a8 | 169 | select HAVE_VIRT_CPU_ACCOUNTING |
786d35d4 | 170 | select MODULES_USE_ELF_RELA |
50be6345 | 171 | select NO_BOOTMEM |
7eddd99c | 172 | select OLD_SIGACTION |
93bead43 | 173 | select OLD_SIGSUSPEND3 |
bb98f396 | 174 | select SPARSE_IRQ |
0e0d04a8 | 175 | select SYSCTL_EXCEPTION_TRACE |
d5c352cd | 176 | select THREAD_INFO_IN_TASK |
0563416b | 177 | select TTY |
0e0d04a8 | 178 | select VIRT_CPU_ACCOUNTING |
40565b5a | 179 | select ARCH_HAS_SCALED_CPUTIME |
93bead43 | 180 | select VIRT_TO_BUS |
42a0bb3f | 181 | select HAVE_NMI |
3a368f74 | 182 | |
1da177e4 | 183 | |
fca3e357 | 184 | config SCHED_OMIT_FRAME_POINTER |
6f9a3c33 | 185 | def_bool y |
fca3e357 | 186 | |
c81956c9 KS |
187 | config PGTABLE_LEVELS |
188 | int | |
1aea9b3f | 189 | default 5 |
c81956c9 | 190 | |
1da177e4 LT |
191 | source "init/Kconfig" |
192 | ||
dc52ddc0 MH |
193 | source "kernel/Kconfig.freezer" |
194 | ||
21042d43 JS |
195 | source "kernel/livepatch/Kconfig" |
196 | ||
843c48fd JG |
197 | menu "Processor type and features" |
198 | ||
199 | config HAVE_MARCH_Z900_FEATURES | |
200 | def_bool n | |
201 | ||
202 | config HAVE_MARCH_Z990_FEATURES | |
203 | def_bool n | |
204 | select HAVE_MARCH_Z900_FEATURES | |
205 | ||
206 | config HAVE_MARCH_Z9_109_FEATURES | |
207 | def_bool n | |
208 | select HAVE_MARCH_Z990_FEATURES | |
209 | ||
210 | config HAVE_MARCH_Z10_FEATURES | |
211 | def_bool n | |
212 | select HAVE_MARCH_Z9_109_FEATURES | |
213 | ||
214 | config HAVE_MARCH_Z196_FEATURES | |
215 | def_bool n | |
216 | select HAVE_MARCH_Z10_FEATURES | |
217 | ||
991c1505 HC |
218 | config HAVE_MARCH_ZEC12_FEATURES |
219 | def_bool n | |
220 | select HAVE_MARCH_Z196_FEATURES | |
221 | ||
f8b2dcbd MS |
222 | config HAVE_MARCH_Z13_FEATURES |
223 | def_bool n | |
224 | select HAVE_MARCH_ZEC12_FEATURES | |
225 | ||
6997c323 MS |
226 | config HAVE_MARCH_Z14_FEATURES |
227 | def_bool n | |
228 | select HAVE_MARCH_Z13_FEATURES | |
229 | ||
843c48fd JG |
230 | choice |
231 | prompt "Processor type" | |
7072276e | 232 | default MARCH_Z196 |
1da177e4 | 233 | |
843c48fd JG |
234 | config MARCH_Z900 |
235 | bool "IBM zSeries model z800 and z900" | |
5a79859a | 236 | select HAVE_MARCH_Z900_FEATURES |
843c48fd JG |
237 | help |
238 | Select this to enable optimizations for model z800/z900 (2064 and | |
239 | 2066 series). This will enable some optimizations that are not | |
240 | available on older ESA/390 (31 Bit) only CPUs. | |
241 | ||
242 | config MARCH_Z990 | |
243 | bool "IBM zSeries model z890 and z990" | |
5a79859a | 244 | select HAVE_MARCH_Z990_FEATURES |
843c48fd JG |
245 | help |
246 | Select this to enable optimizations for model z890/z990 (2084 and | |
247 | 2086 series). The kernel will be slightly faster but will not work | |
248 | on older machines. | |
249 | ||
250 | config MARCH_Z9_109 | |
251 | bool "IBM System z9" | |
5a79859a | 252 | select HAVE_MARCH_Z9_109_FEATURES |
843c48fd JG |
253 | help |
254 | Select this to enable optimizations for IBM System z9 (2094 and | |
255 | 2096 series). The kernel will be slightly faster but will not work | |
256 | on older machines. | |
257 | ||
258 | config MARCH_Z10 | |
259 | bool "IBM System z10" | |
5a79859a | 260 | select HAVE_MARCH_Z10_FEATURES |
843c48fd JG |
261 | help |
262 | Select this to enable optimizations for IBM System z10 (2097 and | |
263 | 2098 series). The kernel will be slightly faster but will not work | |
264 | on older machines. | |
265 | ||
266 | config MARCH_Z196 | |
267 | bool "IBM zEnterprise 114 and 196" | |
5a79859a | 268 | select HAVE_MARCH_Z196_FEATURES |
843c48fd JG |
269 | help |
270 | Select this to enable optimizations for IBM zEnterprise 114 and 196 | |
271 | (2818 and 2817 series). The kernel will be slightly faster but will | |
272 | not work on older machines. | |
1da177e4 | 273 | |
991c1505 | 274 | config MARCH_ZEC12 |
59471227 | 275 | bool "IBM zBC12 and zEC12" |
5a79859a | 276 | select HAVE_MARCH_ZEC12_FEATURES |
991c1505 | 277 | help |
59471227 HC |
278 | Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and |
279 | 2827 series). The kernel will be slightly faster but will not work on | |
280 | older machines. | |
991c1505 | 281 | |
f8b2dcbd | 282 | config MARCH_Z13 |
bb3aa614 | 283 | bool "IBM z13s and z13" |
5a79859a | 284 | select HAVE_MARCH_Z13_FEATURES |
f8b2dcbd | 285 | help |
bb3aa614 HC |
286 | Select this to enable optimizations for IBM z13s and z13 (2965 and |
287 | 2964 series). The kernel will be slightly faster but will not work on | |
288 | older machines. | |
f8b2dcbd | 289 | |
6997c323 MS |
290 | config MARCH_Z14 |
291 | bool "IBM z14" | |
292 | select HAVE_MARCH_Z14_FEATURES | |
293 | help | |
294 | Select this to enable optimizations for IBM z14 (3906 series). | |
295 | The kernel will be slightly faster but will not work on older | |
296 | machines. | |
297 | ||
843c48fd | 298 | endchoice |
1da177e4 | 299 | |
1db9e051 HC |
300 | config MARCH_Z900_TUNE |
301 | def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT | |
302 | ||
303 | config MARCH_Z990_TUNE | |
304 | def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT | |
305 | ||
306 | config MARCH_Z9_109_TUNE | |
307 | def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT | |
308 | ||
309 | config MARCH_Z10_TUNE | |
310 | def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT | |
311 | ||
312 | config MARCH_Z196_TUNE | |
313 | def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT | |
314 | ||
315 | config MARCH_ZEC12_TUNE | |
316 | def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT | |
317 | ||
f8b2dcbd MS |
318 | config MARCH_Z13_TUNE |
319 | def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT | |
320 | ||
6997c323 MS |
321 | config MARCH_Z14_TUNE |
322 | def_bool TUNE_Z14 || MARCH_Z14 && TUNE_DEFAULT | |
323 | ||
1db9e051 HC |
324 | choice |
325 | prompt "Tune code generation" | |
326 | default TUNE_DEFAULT | |
327 | help | |
328 | Cause the compiler to tune (-mtune) the generated code for a machine. | |
329 | This will make the code run faster on the selected machine but | |
330 | somewhat slower on other machines. | |
331 | This option only changes how the compiler emits instructions, not the | |
332 | selection of instructions itself, so the resulting kernel will run on | |
333 | all other machines. | |
334 | ||
335 | config TUNE_DEFAULT | |
336 | bool "Default" | |
337 | help | |
338 | Tune the generated code for the target processor for which the kernel | |
339 | will be compiled. | |
340 | ||
1db9e051 HC |
341 | config TUNE_Z900 |
342 | bool "IBM zSeries model z800 and z900" | |
343 | ||
344 | config TUNE_Z990 | |
345 | bool "IBM zSeries model z890 and z990" | |
346 | ||
347 | config TUNE_Z9_109 | |
348 | bool "IBM System z9" | |
349 | ||
350 | config TUNE_Z10 | |
351 | bool "IBM System z10" | |
352 | ||
353 | config TUNE_Z196 | |
354 | bool "IBM zEnterprise 114 and 196" | |
355 | ||
356 | config TUNE_ZEC12 | |
357 | bool "IBM zBC12 and zEC12" | |
358 | ||
f8b2dcbd MS |
359 | config TUNE_Z13 |
360 | bool "IBM z13" | |
361 | ||
6997c323 MS |
362 | config TUNE_Z14 |
363 | bool "IBM z14" | |
364 | ||
1db9e051 HC |
365 | endchoice |
366 | ||
347a8dc3 | 367 | config 64BIT |
6f9a3c33 | 368 | def_bool y |
d9f7a745 | 369 | |
843c48fd JG |
370 | config COMPAT |
371 | def_bool y | |
372 | prompt "Kernel support for 31 bit emulation" | |
843c48fd JG |
373 | select COMPAT_BINFMT_ELF if BINFMT_ELF |
374 | select ARCH_WANT_OLD_COMPAT_IPC | |
7eddd99c | 375 | select COMPAT_OLD_SIGACTION |
2813893f | 376 | depends on MULTIUSER |
843c48fd JG |
377 | help |
378 | Select this option if you want to enable your system kernel to | |
379 | handle system-calls from ELF binaries for 31 bit ESA. This option | |
380 | (and some other stuff like libraries and such) is needed for | |
381 | executing 31 bit applications. It is safe to say "Y". | |
382 | ||
383 | config SYSVIPC_COMPAT | |
384 | def_bool y if COMPAT && SYSVIPC | |
385 | ||
1da177e4 | 386 | config SMP |
6f9a3c33 MS |
387 | def_bool y |
388 | prompt "Symmetric multi-processing support" | |
1da177e4 LT |
389 | ---help--- |
390 | This enables support for systems with more than one CPU. If you have | |
391 | a system with only one CPU, like most personal computers, say N. If | |
392 | you have a system with more than one CPU, say Y. | |
393 | ||
4a474157 | 394 | If you say N here, the kernel will run on uni- and multiprocessor |
1da177e4 LT |
395 | machines, but will use only one CPU of a multiprocessor machine. If |
396 | you say Y here, the kernel will run on many, but not all, | |
4a474157 | 397 | uniprocessor machines. On a uniprocessor machine, the kernel |
1da177e4 LT |
398 | will run faster if you say N here. |
399 | ||
03502faa AB |
400 | See also the SMP-HOWTO available at |
401 | <http://www.tldp.org/docs.html#howto>. | |
1da177e4 LT |
402 | |
403 | Even if you don't know what to do here, say Y. | |
404 | ||
405 | config NR_CPUS | |
5c75a0da HC |
406 | int "Maximum number of CPUs (2-512)" |
407 | range 2 512 | |
1da177e4 | 408 | depends on SMP |
5a79859a | 409 | default "64" |
1da177e4 LT |
410 | help |
411 | This allows you to specify the maximum number of CPUs which this | |
5c75a0da | 412 | kernel will support. The maximum supported value is 512 and the |
1da177e4 LT |
413 | minimum value which makes sense is 2. |
414 | ||
415 | This is purely to save memory - each supported CPU adds | |
416 | approximately sixteen kilobytes to the kernel image. | |
417 | ||
418 | config HOTPLUG_CPU | |
6f9a3c33 MS |
419 | def_bool y |
420 | prompt "Support for hot-pluggable CPUs" | |
1da177e4 | 421 | depends on SMP |
1da177e4 LT |
422 | help |
423 | Say Y here to be able to turn CPUs off and on. CPUs | |
424 | can be controlled through /sys/devices/system/cpu/cpu#. | |
425 | Say N if you want to disable CPU hotplug. | |
426 | ||
3a368f74 PH |
427 | # Some NUMA nodes have memory ranges that span |
428 | # other nodes. Even though a pfn is valid and | |
429 | # between a node's start and end pfns, it may not | |
430 | # reside on that node. See memmap_init_zone() | |
431 | # for details. <- They meant memory holes! | |
432 | config NODES_SPAN_OTHER_NODES | |
433 | def_bool NUMA | |
434 | ||
435 | config NUMA | |
436 | bool "NUMA support" | |
c095a949 | 437 | depends on SMP && SCHED_TOPOLOGY |
3a368f74 PH |
438 | default n |
439 | help | |
440 | Enable NUMA support | |
441 | ||
442 | This option adds NUMA support to the kernel. | |
443 | ||
444 | An operation mode can be selected by appending | |
445 | numa=<method> to the kernel command line. | |
446 | ||
447 | The default behaviour is identical to appending numa=plain to | |
448 | the command line. This will create just one node with all | |
449 | available memory and all CPUs in it. | |
450 | ||
451 | config NODES_SHIFT | |
452 | int "Maximum NUMA nodes (as a power of 2)" | |
453 | range 1 10 | |
454 | depends on NUMA | |
455 | default "4" | |
456 | help | |
457 | Specify the maximum number of NUMA nodes available on the target | |
458 | system. Increases memory reserved to accommodate various tables. | |
459 | ||
c29a7baf MH |
460 | menu "Select NUMA modes" |
461 | depends on NUMA | |
462 | ||
463 | config NUMA_EMU | |
464 | bool "NUMA emulation" | |
465 | default y | |
466 | help | |
467 | Numa emulation mode will split the available system memory into | |
468 | equal chunks which then are distributed over the configured number | |
469 | of nodes in a round-robin manner. | |
470 | ||
471 | The number of fake nodes is limited by the number of available memory | |
472 | chunks (i.e. memory size / fake size) and the number of supported | |
473 | nodes in the kernel. | |
474 | ||
475 | The CPUs are assigned to the nodes in a way that partially respects | |
476 | the original machine topology (if supported by the machine). | |
477 | Fair distribution of the CPUs is not guaranteed. | |
478 | ||
479 | config EMU_SIZE | |
480 | hex "NUMA emulation memory chunk size" | |
481 | default 0x10000000 | |
482 | range 0x400000 0x100000000 | |
483 | depends on NUMA_EMU | |
484 | help | |
485 | Select the default size by which the memory is chopped and then | |
486 | assigned to emulated NUMA nodes. | |
487 | ||
488 | This can be overridden by specifying | |
489 | ||
490 | emu_size=<n> | |
491 | ||
492 | on the kernel command line where also suffixes K, M, G, and T are | |
493 | supported. | |
494 | ||
495 | endmenu | |
9236b4dd HC |
496 | |
497 | config SCHED_SMT | |
498 | def_bool n | |
c29a7baf | 499 | |
8d11e021 | 500 | config SCHED_MC |
83a24e32 | 501 | def_bool n |
8d11e021 | 502 | |
4cb14bc8 | 503 | config SCHED_BOOK |
10ad34bc MS |
504 | def_bool n |
505 | ||
adac0f1e HC |
506 | config SCHED_DRAWER |
507 | def_bool n | |
508 | ||
10ad34bc | 509 | config SCHED_TOPOLOGY |
6f9a3c33 | 510 | def_bool y |
10ad34bc | 511 | prompt "Topology scheduler support" |
83a24e32 | 512 | depends on SMP |
10ad34bc | 513 | select SCHED_SMT |
83a24e32 | 514 | select SCHED_MC |
10ad34bc | 515 | select SCHED_BOOK |
adac0f1e | 516 | select SCHED_DRAWER |
4cb14bc8 | 517 | help |
10ad34bc MS |
518 | Topology scheduler support improves the CPU scheduler's decision |
519 | making when dealing with machines that have multi-threading, | |
520 | multiple cores or multiple books. | |
4cb14bc8 | 521 | |
843c48fd JG |
522 | source kernel/Kconfig.preempt |
523 | ||
843c48fd | 524 | source kernel/Kconfig.hz |
1da177e4 | 525 | |
4c637cd8 HF |
526 | config ARCH_RANDOM |
527 | def_bool y | |
528 | prompt "s390 architectural random number generation API" | |
529 | help | |
530 | Enable the s390 architectural random number generation API | |
531 | to provide random data for all consumers within the Linux | |
532 | kernel. | |
533 | ||
534 | When enabled the arch_random_* functions declared in linux/random.h | |
535 | are implemented. The implementation is based on the s390 CPACF | |
536 | instruction subfunction TRNG which provides a real true random | |
537 | number generator. | |
538 | ||
539 | If unsure, say Y. | |
540 | ||
843c48fd | 541 | endmenu |
1da177e4 | 542 | |
843c48fd | 543 | menu "Memory setup" |
1d057720 | 544 | |
843c48fd | 545 | config ARCH_SPARSEMEM_ENABLE |
6f9a3c33 | 546 | def_bool y |
843c48fd JG |
547 | select SPARSEMEM_VMEMMAP_ENABLE |
548 | select SPARSEMEM_VMEMMAP | |
e65e1fc2 | 549 | |
843c48fd JG |
550 | config ARCH_SPARSEMEM_DEFAULT |
551 | def_bool y | |
1da177e4 | 552 | |
843c48fd JG |
553 | config ARCH_SELECT_MEMORY_MODEL |
554 | def_bool y | |
1da177e4 | 555 | |
843c48fd JG |
556 | config ARCH_ENABLE_MEMORY_HOTPLUG |
557 | def_bool y if SPARSEMEM | |
0efa4703 | 558 | |
843c48fd JG |
559 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
560 | def_bool y | |
e37f50e1 | 561 | |
ec66ad66 MS |
562 | config ARCH_ENABLE_SPLIT_PMD_PTLOCK |
563 | def_bool y | |
ec66ad66 | 564 | |
843c48fd JG |
565 | config FORCE_MAX_ZONEORDER |
566 | int | |
567 | default "9" | |
f861e405 | 568 | |
843c48fd | 569 | source "mm/Kconfig" |
1da177e4 | 570 | |
b8402b95 HC |
571 | config MAX_PHYSMEM_BITS |
572 | int "Maximum size of supported physical memory in bits (42-53)" | |
573 | range 42 53 | |
574 | default "46" | |
575 | help | |
576 | This option specifies the maximum supported size of physical memory | |
577 | in bits. Supported is any size between 2^42 (4TB) and 2^53 (8PB). | |
578 | Increasing the number of bits also increases the kernel image size. | |
579 | By default 46 bits (64TB) are supported. | |
580 | ||
1da177e4 | 581 | config PACK_STACK |
6f9a3c33 MS |
582 | def_bool y |
583 | prompt "Pack kernel stack" | |
1da177e4 LT |
584 | help |
585 | This option enables the compiler option -mkernel-backchain if it | |
586 | is available. If the option is available the compiler supports | |
587 | the new stack layout which dramatically reduces the minimum stack | |
588 | frame size. With an old compiler a non-leaf function needs a | |
589 | minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With | |
590 | -mkernel-backchain the minimum size drops to 16 byte on 31 bit | |
591 | and 24 byte on 64 bit. | |
592 | ||
593 | Say Y if you are unsure. | |
594 | ||
1da177e4 | 595 | config CHECK_STACK |
6f9a3c33 MS |
596 | def_bool y |
597 | prompt "Detect kernel stack overflow" | |
1da177e4 LT |
598 | help |
599 | This option enables the compiler option -mstack-guard and | |
600 | -mstack-size if they are available. If the compiler supports them | |
601 | it will emit additional code to each function prolog to trigger | |
602 | an illegal operation if the kernel stack is about to overflow. | |
603 | ||
604 | Say N if you are unsure. | |
605 | ||
606 | config STACK_GUARD | |
607 | int "Size of the guard area (128-1024)" | |
608 | range 128 1024 | |
609 | depends on CHECK_STACK | |
610 | default "256" | |
611 | help | |
612 | This allows you to specify the size of the guard area at the lower | |
613 | end of the kernel stack. If the kernel stack points into the guard | |
614 | area on function entry an illegal operation is triggered. The size | |
615 | needs to be a power of 2. Please keep in mind that the size of an | |
616 | interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit. | |
617 | The minimum size for the stack guard should be 256 for 31 bit and | |
618 | 512 for 64 bit. | |
619 | ||
2c190da4 | 620 | config WARN_DYNAMIC_STACK |
6f9a3c33 | 621 | def_bool n |
2c190da4 | 622 | prompt "Emit compiler warnings for function with dynamic stack usage" |
1da177e4 | 623 | help |
2c190da4 JG |
624 | This option enables the compiler option -mwarn-dynamicstack. If the |
625 | compiler supports this options generates warnings for functions | |
626 | that dynamically allocate stack space using alloca. | |
1da177e4 LT |
627 | |
628 | Say N if you are unsure. | |
629 | ||
843c48fd | 630 | endmenu |
3f22ab27 | 631 | |
843c48fd | 632 | menu "I/O subsystem" |
1da177e4 | 633 | |
1da177e4 | 634 | config QDIO |
6f9a3c33 MS |
635 | def_tristate y |
636 | prompt "QDIO support" | |
1da177e4 | 637 | ---help--- |
8129ee16 | 638 | This driver provides the Queued Direct I/O base support for |
efca13bc | 639 | IBM System z. |
1da177e4 LT |
640 | |
641 | To compile this driver as a module, choose M here: the | |
642 | module will be called qdio. | |
643 | ||
644 | If unsure, say Y. | |
645 | ||
c8717a3d JG |
646 | menuconfig PCI |
647 | bool "PCI support" | |
c8717a3d | 648 | select PCI_MSI |
8128f23c | 649 | select IOMMU_SUPPORT |
c8717a3d JG |
650 | help |
651 | Enable PCI support. | |
652 | ||
653 | if PCI | |
654 | ||
655 | config PCI_NR_FUNCTIONS | |
656 | int "Maximum number of PCI functions (1-4096)" | |
657 | range 1 4096 | |
b18601b0 | 658 | default "128" |
c8717a3d JG |
659 | help |
660 | This allows you to specify the maximum number of PCI functions which | |
661 | this kernel will support. | |
662 | ||
663 | source "drivers/pci/Kconfig" | |
c8717a3d JG |
664 | |
665 | endif # PCI | |
666 | ||
667 | config PCI_DOMAINS | |
668 | def_bool PCI | |
669 | ||
670 | config HAS_IOMEM | |
671 | def_bool PCI | |
672 | ||
673 | config IOMMU_HELPER | |
674 | def_bool PCI | |
675 | ||
c8717a3d JG |
676 | config NEED_SG_DMA_LENGTH |
677 | def_bool PCI | |
678 | ||
91630032 JG |
679 | config NEED_DMA_MAP_STATE |
680 | def_bool PCI | |
681 | ||
9d92a7e1 | 682 | config CHSC_SCH |
d9c11b1e | 683 | def_tristate m |
6f9a3c33 | 684 | prompt "Support for CHSC subchannels" |
9d92a7e1 CH |
685 | help |
686 | This driver allows usage of CHSC subchannels. A CHSC subchannel | |
687 | is usually present on LPAR only. | |
688 | The driver creates a device /dev/chsc, which may be used to | |
689 | obtain I/O configuration information about the machine and | |
690 | to issue asynchronous chsc commands (DANGEROUS). | |
691 | You will usually only want to use this interface on a special | |
692 | LPAR designated for system management. | |
693 | ||
694 | To compile this driver as a module, choose M here: the | |
695 | module will be called chsc_sch. | |
696 | ||
697 | If unsure, say N. | |
698 | ||
1d1c8f78 SO |
699 | config SCM_BUS |
700 | def_bool y | |
1d1c8f78 SO |
701 | prompt "SCM bus driver" |
702 | help | |
703 | Bus driver for Storage Class Memory. | |
704 | ||
eadb86ab SO |
705 | config EADM_SCH |
706 | def_tristate m | |
707 | prompt "Support for EADM subchannels" | |
708 | depends on SCM_BUS | |
709 | help | |
710 | This driver allows usage of EADM subchannels. EADM subchannels act | |
711 | as a communication vehicle for SCM increments. | |
712 | ||
713 | To compile this driver as a module, choose M here: the | |
714 | module will be called eadm_sch. | |
715 | ||
63f1934d DJS |
716 | config VFIO_CCW |
717 | def_tristate n | |
718 | prompt "Support for VFIO-CCW subchannels" | |
84cd8fc4 | 719 | depends on S390_CCW_IOMMU && VFIO_MDEV |
63f1934d DJS |
720 | help |
721 | This driver allows usage of I/O subchannels via VFIO-CCW. | |
722 | ||
723 | To compile this driver as a module, choose M here: the | |
724 | module will be called vfio_ccw. | |
725 | ||
843c48fd JG |
726 | endmenu |
727 | ||
728 | menu "Dump support" | |
729 | ||
730 | config CRASH_DUMP | |
731 | bool "kernel crash dumps" | |
5a79859a | 732 | depends on SMP |
843c48fd JG |
733 | select KEXEC |
734 | help | |
735 | Generate crash dump after being started by kexec. | |
736 | Crash dump kernels are loaded in the main kernel with kexec-tools | |
737 | into a specially reserved region and then later executed after | |
738 | a crash by kdump/kexec. | |
843c48fd | 739 | Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this. |
bf28a597 MH |
740 | This option also enables s390 zfcpdump. |
741 | See also <file:Documentation/s390/zfcpdump.txt> | |
843c48fd JG |
742 | |
743 | endmenu | |
744 | ||
745 | menu "Executable file formats / Emulations" | |
1da177e4 | 746 | |
1da177e4 LT |
747 | source "fs/Kconfig.binfmt" |
748 | ||
843c48fd JG |
749 | config SECCOMP |
750 | def_bool y | |
751 | prompt "Enable seccomp to safely compute untrusted bytecode" | |
752 | depends on PROC_FS | |
753 | help | |
754 | This kernel feature is useful for number crunching applications | |
755 | that may need to compute untrusted bytecode during their | |
756 | execution. By using pipes or other transports made available to | |
757 | the process as file descriptors supporting the read/write | |
758 | syscalls, it's possible to isolate those applications in | |
759 | their own address space using seccomp. Once seccomp is | |
760 | enabled via /proc/<pid>/seccomp, it cannot be disabled | |
761 | and the task is only allowed to execute a few safe syscalls | |
762 | defined by each seccomp mode. | |
763 | ||
764 | If unsure, say Y. | |
765 | ||
766 | endmenu | |
767 | ||
768 | menu "Power Management" | |
769 | ||
770 | config ARCH_HIBERNATION_POSSIBLE | |
5a79859a | 771 | def_bool y |
843c48fd JG |
772 | |
773 | source "kernel/power/Kconfig" | |
774 | ||
775 | endmenu | |
776 | ||
777 | source "net/Kconfig" | |
778 | ||
779 | config PCMCIA | |
780 | def_bool n | |
781 | ||
782 | config CCW | |
783 | def_bool y | |
784 | ||
785 | source "drivers/Kconfig" | |
786 | ||
787 | source "fs/Kconfig" | |
788 | ||
789 | source "arch/s390/Kconfig.debug" | |
790 | ||
791 | source "security/Kconfig" | |
792 | ||
793 | source "crypto/Kconfig" | |
794 | ||
795 | source "lib/Kconfig" | |
796 | ||
797 | menu "Virtualization" | |
684de39b | 798 | |
1da177e4 | 799 | config PFAULT |
6f9a3c33 MS |
800 | def_bool y |
801 | prompt "Pseudo page fault support" | |
1da177e4 LT |
802 | help |
803 | Select this option, if you want to use PFAULT pseudo page fault | |
804 | handling under VM. If running native or in LPAR, this option | |
805 | has no effect. If your VM does not support PFAULT, PAGEEX | |
806 | pseudo page fault handling will be used. | |
807 | Note that VM 4.2 supports PFAULT but has a bug in its | |
808 | implementation that causes some problems. | |
809 | Everybody who wants to run Linux under VM != VM4.2 should select | |
810 | this option. | |
811 | ||
812 | config SHARED_KERNEL | |
0eccc783 HC |
813 | bool "VM shared kernel support" |
814 | depends on !JUMP_LABEL | |
1da177e4 LT |
815 | help |
816 | Select this option, if you want to share the text segment of the | |
817 | Linux kernel between different VM guests. This reduces memory | |
818 | usage with lots of guests but greatly increases kernel size. | |
9c9c1761 HC |
819 | Also if a kernel was IPL'ed from a shared segment the kexec system |
820 | call will not work. | |
1da177e4 LT |
821 | You should only select this option if you know what you are |
822 | doing and want to exploit this feature. | |
823 | ||
824 | config CMM | |
6f9a3c33 MS |
825 | def_tristate n |
826 | prompt "Cooperative memory management" | |
1da177e4 LT |
827 | help |
828 | Select this option, if you want to enable the kernel interface | |
829 | to reduce the memory size of the system. This is accomplished | |
830 | by allocating pages of memory and put them "on hold". This only | |
831 | makes sense for a system running under VM where the unused pages | |
832 | will be reused by VM for other guest systems. The interface | |
833 | allows an external monitor to balance memory of many systems. | |
834 | Everybody who wants to run Linux under VM should select this | |
835 | option. | |
836 | ||
1da177e4 | 837 | config CMM_IUCV |
6f9a3c33 MS |
838 | def_bool y |
839 | prompt "IUCV special message interface to cooperative memory management" | |
1da177e4 LT |
840 | depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV) |
841 | help | |
842 | Select this option to enable the special message interface to | |
843 | the cooperative memory management. | |
844 | ||
1da177e4 | 845 | config APPLDATA_BASE |
6f9a3c33 MS |
846 | def_bool n |
847 | prompt "Linux - VM Monitor Stream, base infrastructure" | |
c185b783 | 848 | depends on PROC_FS |
1da177e4 LT |
849 | help |
850 | This provides a kernel interface for creating and updating z/VM APPLDATA | |
851 | monitor records. The monitor records are updated at certain time | |
852 | intervals, once the timer is started. | |
853 | Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer, | |
854 | i.e. enables or disables monitoring on the Linux side. | |
855 | A custom interval value (in seconds) can be written to | |
856 | /proc/appldata/interval. | |
857 | ||
858 | Defaults are 60 seconds interval and timer off. | |
859 | The /proc entries can also be read from, showing the current settings. | |
860 | ||
861 | config APPLDATA_MEM | |
6f9a3c33 MS |
862 | def_tristate m |
863 | prompt "Monitor memory management statistics" | |
62fb2ba3 | 864 | depends on APPLDATA_BASE && VM_EVENT_COUNTERS |
1da177e4 LT |
865 | help |
866 | This provides memory management related data to the Linux - VM Monitor | |
867 | Stream, like paging/swapping rate, memory utilisation, etc. | |
868 | Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM | |
869 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
870 | on the z/VM side. | |
871 | ||
872 | Default is disabled. | |
873 | The /proc entry can also be read from, showing the current settings. | |
874 | ||
875 | This can also be compiled as a module, which will be called | |
876 | appldata_mem.o. | |
877 | ||
878 | config APPLDATA_OS | |
6f9a3c33 MS |
879 | def_tristate m |
880 | prompt "Monitor OS statistics" | |
1da177e4 LT |
881 | depends on APPLDATA_BASE |
882 | help | |
883 | This provides OS related data to the Linux - VM Monitor Stream, like | |
884 | CPU utilisation, etc. | |
885 | Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM | |
886 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
887 | on the z/VM side. | |
888 | ||
889 | Default is disabled. | |
890 | This can also be compiled as a module, which will be called | |
891 | appldata_os.o. | |
892 | ||
893 | config APPLDATA_NET_SUM | |
6f9a3c33 MS |
894 | def_tristate m |
895 | prompt "Monitor overall network statistics" | |
70193af9 | 896 | depends on APPLDATA_BASE && NET |
1da177e4 LT |
897 | help |
898 | This provides network related data to the Linux - VM Monitor Stream, | |
899 | currently there is only a total sum of network I/O statistics, no | |
900 | per-interface data. | |
901 | Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM | |
902 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
903 | on the z/VM side. | |
904 | ||
905 | Default is disabled. | |
906 | This can also be compiled as a module, which will be called | |
907 | appldata_net_sum.o. | |
908 | ||
24bbb1fa | 909 | config S390_HYPFS_FS |
6f9a3c33 MS |
910 | def_bool y |
911 | prompt "s390 hypervisor file system support" | |
24bbb1fa | 912 | select SYS_HYPERVISOR |
24bbb1fa MH |
913 | help |
914 | This is a virtual file system intended to provide accounting | |
915 | information in an s390 hypervisor environment. | |
916 | ||
843c48fd | 917 | source "arch/s390/kvm/Kconfig" |
411ed322 | 918 | |
fa587743 | 919 | config S390_GUEST |
6f9a3c33 | 920 | def_bool y |
510cf5a6 | 921 | prompt "s390 support for virtio devices" |
79b6f7fb | 922 | select TTY |
80629b0b | 923 | select VIRTUALIZATION |
fa587743 | 924 | select VIRTIO |
faeba830 | 925 | select VIRTIO_CONSOLE |
fa587743 | 926 | help |
bdd1fc27 CH |
927 | Enabling this option adds support for virtio based paravirtual device |
928 | drivers on s390. | |
1da177e4 | 929 | |
20766c08 | 930 | Select this option if you want to run the kernel as a guest under |
bdd1fc27 | 931 | the KVM hypervisor. |
155af2f9 | 932 | |
3b2fbb3f CH |
933 | config S390_GUEST_OLD_TRANSPORT |
934 | def_bool y | |
935 | prompt "Guest support for old s390 virtio transport (DEPRECATED)" | |
936 | depends on S390_GUEST | |
937 | help | |
938 | Enable this option to add support for the old s390-virtio | |
939 | transport (i.e. virtio devices NOT based on virtio-ccw). This | |
940 | type of virtio devices is only available on the experimental | |
941 | kuli userspace or with old (< 2.6) qemu. If you are running | |
942 | with a modern version of qemu (which supports virtio-ccw since | |
943 | 1.4 and uses it by default since version 2.4), you probably won't | |
944 | need this. | |
945 | ||
155af2f9 | 946 | endmenu |