Commit | Line | Data |
---|---|---|
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 |
79962038 | 71 | select ARCH_HAS_FORTIFY_SOURCE |
957e3fac | 72 | select ARCH_HAS_GCOV_PROFILE_ALL |
e1073d1e | 73 | select ARCH_HAS_GIGANTIC_PAGE if (MEMORY_ISOLATION && COMPACTION) || CMA |
907fa061 | 74 | select ARCH_HAS_KCOV |
d2852a22 | 75 | select ARCH_HAS_SET_MEMORY |
47523c98 | 76 | select ARCH_HAS_SG_CHAIN |
ad21fc4f LA |
77 | select ARCH_HAS_STRICT_KERNEL_RWX |
78 | select ARCH_HAS_STRICT_MODULE_RWX | |
c42d8c7d | 79 | select ARCH_HAS_UBSAN_SANITIZE_ALL |
0e0d04a8 | 80 | select ARCH_HAVE_NMI_SAFE_CMPXCHG |
6beb0009 TG |
81 | select ARCH_INLINE_READ_LOCK |
82 | select ARCH_INLINE_READ_LOCK_BH | |
83 | select ARCH_INLINE_READ_LOCK_IRQ | |
84 | select ARCH_INLINE_READ_LOCK_IRQSAVE | |
0e0d04a8 | 85 | select ARCH_INLINE_READ_TRYLOCK |
6beb0009 TG |
86 | select ARCH_INLINE_READ_UNLOCK |
87 | select ARCH_INLINE_READ_UNLOCK_BH | |
88 | select ARCH_INLINE_READ_UNLOCK_IRQ | |
89 | select ARCH_INLINE_READ_UNLOCK_IRQRESTORE | |
0e0d04a8 HC |
90 | select ARCH_INLINE_SPIN_LOCK |
91 | select ARCH_INLINE_SPIN_LOCK_BH | |
92 | select ARCH_INLINE_SPIN_LOCK_IRQ | |
93 | select ARCH_INLINE_SPIN_LOCK_IRQSAVE | |
94 | select ARCH_INLINE_SPIN_TRYLOCK | |
95 | select ARCH_INLINE_SPIN_TRYLOCK_BH | |
96 | select ARCH_INLINE_SPIN_UNLOCK | |
97 | select ARCH_INLINE_SPIN_UNLOCK_BH | |
98 | select ARCH_INLINE_SPIN_UNLOCK_IRQ | |
99 | select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE | |
6beb0009 TG |
100 | select ARCH_INLINE_WRITE_LOCK |
101 | select ARCH_INLINE_WRITE_LOCK_BH | |
102 | select ARCH_INLINE_WRITE_LOCK_IRQ | |
103 | select ARCH_INLINE_WRITE_LOCK_IRQSAVE | |
0e0d04a8 | 104 | select ARCH_INLINE_WRITE_TRYLOCK |
6beb0009 TG |
105 | select ARCH_INLINE_WRITE_UNLOCK |
106 | select ARCH_INLINE_WRITE_UNLOCK_BH | |
107 | select ARCH_INLINE_WRITE_UNLOCK_IRQ | |
108 | select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE | |
0e0d04a8 | 109 | select ARCH_SAVE_PAGE_KEYS if HIBERNATION |
36e7fdaa | 110 | select ARCH_SUPPORTS_ATOMIC_RMW |
fd15a1f3 | 111 | select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT |
a763bc8b | 112 | select ARCH_SUPPORTS_NUMA_BALANCING |
295d8fa9 | 113 | select ARCH_USE_BUILTIN_BSWAP |
efc1d23b | 114 | select ARCH_USE_CMPXCHG_LOCKREF |
3f6813b9 | 115 | select ARCH_WANTS_DYNAMIC_TASK_STRUCT |
a763bc8b | 116 | select ARCH_WANTS_PROT_NUMA_PROT_NONE |
c42d8c7d | 117 | select ARCH_WANTS_UBSAN_NO_NULL |
c1d7e01d | 118 | select ARCH_WANT_IPC_PARSE_VERSION |
0e0d04a8 HC |
119 | select BUILDTIME_EXTABLE_SORT |
120 | select CLONE_BACKWARDS2 | |
5d6a0163 | 121 | select DYNAMIC_FTRACE if FUNCTION_TRACER |
0e0d04a8 | 122 | select GENERIC_CLOCKEVENTS |
8f00b3e2 | 123 | select GENERIC_CPU_AUTOPROBE |
0e0d04a8 | 124 | select GENERIC_CPU_DEVICES if !SMP |
746479cd | 125 | select GENERIC_FIND_FIRST_BIT |
e80e7813 | 126 | select GENERIC_SMP_IDLE_THREAD |
79c74ecb | 127 | select GENERIC_TIME_VSYSCALL |
0e0d04a8 | 128 | select HAVE_ALIGNED_STRUCT_PAGE if SLUB |
7a017721 | 129 | select HAVE_ARCH_AUDITSYSCALL |
5a79859a | 130 | select HAVE_ARCH_JUMP_LABEL |
fff7fb0b | 131 | select CPU_NO_EFFICIENT_FFS if !HAVE_MARCH_Z9_109_FEATURES |
c63cb468 | 132 | select HAVE_ARCH_SECCOMP_FILTER |
5614dd92 | 133 | select HAVE_ARCH_SOFT_DIRTY |
0e0d04a8 | 134 | select HAVE_ARCH_TRACEHOOK |
5a79859a | 135 | select HAVE_ARCH_TRANSPARENT_HUGEPAGE |
6077776b | 136 | select HAVE_EBPF_JIT if PACK_STACK && HAVE_MARCH_Z196_FEATURES |
0e0d04a8 HC |
137 | select HAVE_CMPXCHG_DOUBLE |
138 | select HAVE_CMPXCHG_LOCAL | |
f50c0e63 | 139 | select HAVE_COPY_THREAD_TLS |
0e0d04a8 | 140 | select HAVE_DEBUG_KMEMLEAK |
e82becfc | 141 | select HAVE_DMA_API_DEBUG |
e1231b0e | 142 | select HAVE_DMA_CONTIGUOUS |
7844572c | 143 | select DMA_NOOP_OPS |
5a79859a HC |
144 | select HAVE_DYNAMIC_FTRACE |
145 | select HAVE_DYNAMIC_FTRACE_WITH_REGS | |
9078a549 | 146 | select HAVE_EFFICIENT_UNALIGNED_ACCESS |
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 |
dfd4c493 | 151 | select HAVE_GCC_PLUGINS |
0e0d04a8 HC |
152 | select HAVE_KERNEL_BZIP2 |
153 | select HAVE_KERNEL_GZIP | |
8e2872ce | 154 | select HAVE_KERNEL_LZ4 |
0e0d04a8 HC |
155 | select HAVE_KERNEL_LZMA |
156 | select HAVE_KERNEL_LZO | |
157 | select HAVE_KERNEL_XZ | |
158 | select HAVE_KPROBES | |
159 | select HAVE_KRETPROBES | |
5a79859a | 160 | select HAVE_KVM |
21042d43 | 161 | select HAVE_LIVEPATCH |
c33eff60 HC |
162 | select HAVE_PERF_REGS |
163 | select HAVE_PERF_USER_STACK_DUMP | |
0e0d04a8 HC |
164 | select HAVE_MEMBLOCK |
165 | select HAVE_MEMBLOCK_NODE_MAP | |
50be6345 | 166 | select HAVE_MEMBLOCK_PHYS_MAP |
786d35d4 | 167 | select HAVE_MOD_ARCH_SPECIFIC |
0e0d04a8 HC |
168 | select HAVE_OPROFILE |
169 | select HAVE_PERF_EVENTS | |
170 | select HAVE_REGS_AND_STACK_ACCESS_API | |
171 | select HAVE_SYSCALL_TRACEPOINTS | |
0e0d04a8 | 172 | select HAVE_VIRT_CPU_ACCOUNTING |
786d35d4 | 173 | select MODULES_USE_ELF_RELA |
50be6345 | 174 | select NO_BOOTMEM |
7eddd99c | 175 | select OLD_SIGACTION |
93bead43 | 176 | select OLD_SIGSUSPEND3 |
bb98f396 | 177 | select SPARSE_IRQ |
0e0d04a8 | 178 | select SYSCTL_EXCEPTION_TRACE |
d5c352cd | 179 | select THREAD_INFO_IN_TASK |
0563416b | 180 | select TTY |
0e0d04a8 | 181 | select VIRT_CPU_ACCOUNTING |
40565b5a | 182 | select ARCH_HAS_SCALED_CPUTIME |
93bead43 | 183 | select VIRT_TO_BUS |
42a0bb3f | 184 | select HAVE_NMI |
3a368f74 | 185 | |
1da177e4 | 186 | |
fca3e357 | 187 | config SCHED_OMIT_FRAME_POINTER |
6f9a3c33 | 188 | def_bool y |
fca3e357 | 189 | |
c81956c9 KS |
190 | config PGTABLE_LEVELS |
191 | int | |
1aea9b3f | 192 | default 5 |
c81956c9 | 193 | |
1da177e4 LT |
194 | source "init/Kconfig" |
195 | ||
dc52ddc0 MH |
196 | source "kernel/Kconfig.freezer" |
197 | ||
21042d43 JS |
198 | source "kernel/livepatch/Kconfig" |
199 | ||
843c48fd JG |
200 | menu "Processor type and features" |
201 | ||
202 | config HAVE_MARCH_Z900_FEATURES | |
203 | def_bool n | |
204 | ||
205 | config HAVE_MARCH_Z990_FEATURES | |
206 | def_bool n | |
207 | select HAVE_MARCH_Z900_FEATURES | |
208 | ||
209 | config HAVE_MARCH_Z9_109_FEATURES | |
210 | def_bool n | |
211 | select HAVE_MARCH_Z990_FEATURES | |
212 | ||
213 | config HAVE_MARCH_Z10_FEATURES | |
214 | def_bool n | |
215 | select HAVE_MARCH_Z9_109_FEATURES | |
216 | ||
217 | config HAVE_MARCH_Z196_FEATURES | |
218 | def_bool n | |
219 | select HAVE_MARCH_Z10_FEATURES | |
220 | ||
991c1505 HC |
221 | config HAVE_MARCH_ZEC12_FEATURES |
222 | def_bool n | |
223 | select HAVE_MARCH_Z196_FEATURES | |
224 | ||
f8b2dcbd MS |
225 | config HAVE_MARCH_Z13_FEATURES |
226 | def_bool n | |
227 | select HAVE_MARCH_ZEC12_FEATURES | |
228 | ||
6997c323 MS |
229 | config HAVE_MARCH_Z14_FEATURES |
230 | def_bool n | |
231 | select HAVE_MARCH_Z13_FEATURES | |
232 | ||
843c48fd JG |
233 | choice |
234 | prompt "Processor type" | |
7072276e | 235 | default MARCH_Z196 |
1da177e4 | 236 | |
843c48fd JG |
237 | config MARCH_Z900 |
238 | bool "IBM zSeries model z800 and z900" | |
5a79859a | 239 | select HAVE_MARCH_Z900_FEATURES |
843c48fd JG |
240 | help |
241 | Select this to enable optimizations for model z800/z900 (2064 and | |
242 | 2066 series). This will enable some optimizations that are not | |
243 | available on older ESA/390 (31 Bit) only CPUs. | |
244 | ||
245 | config MARCH_Z990 | |
246 | bool "IBM zSeries model z890 and z990" | |
5a79859a | 247 | select HAVE_MARCH_Z990_FEATURES |
843c48fd JG |
248 | help |
249 | Select this to enable optimizations for model z890/z990 (2084 and | |
250 | 2086 series). The kernel will be slightly faster but will not work | |
251 | on older machines. | |
252 | ||
253 | config MARCH_Z9_109 | |
254 | bool "IBM System z9" | |
5a79859a | 255 | select HAVE_MARCH_Z9_109_FEATURES |
843c48fd JG |
256 | help |
257 | Select this to enable optimizations for IBM System z9 (2094 and | |
258 | 2096 series). The kernel will be slightly faster but will not work | |
259 | on older machines. | |
260 | ||
261 | config MARCH_Z10 | |
262 | bool "IBM System z10" | |
5a79859a | 263 | select HAVE_MARCH_Z10_FEATURES |
843c48fd JG |
264 | help |
265 | Select this to enable optimizations for IBM System z10 (2097 and | |
266 | 2098 series). The kernel will be slightly faster but will not work | |
267 | on older machines. | |
268 | ||
269 | config MARCH_Z196 | |
270 | bool "IBM zEnterprise 114 and 196" | |
5a79859a | 271 | select HAVE_MARCH_Z196_FEATURES |
843c48fd JG |
272 | help |
273 | Select this to enable optimizations for IBM zEnterprise 114 and 196 | |
274 | (2818 and 2817 series). The kernel will be slightly faster but will | |
275 | not work on older machines. | |
1da177e4 | 276 | |
991c1505 | 277 | config MARCH_ZEC12 |
59471227 | 278 | bool "IBM zBC12 and zEC12" |
5a79859a | 279 | select HAVE_MARCH_ZEC12_FEATURES |
991c1505 | 280 | help |
59471227 HC |
281 | Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and |
282 | 2827 series). The kernel will be slightly faster but will not work on | |
283 | older machines. | |
991c1505 | 284 | |
f8b2dcbd | 285 | config MARCH_Z13 |
bb3aa614 | 286 | bool "IBM z13s and z13" |
5a79859a | 287 | select HAVE_MARCH_Z13_FEATURES |
f8b2dcbd | 288 | help |
bb3aa614 HC |
289 | Select this to enable optimizations for IBM z13s and z13 (2965 and |
290 | 2964 series). The kernel will be slightly faster but will not work on | |
291 | older machines. | |
f8b2dcbd | 292 | |
6997c323 MS |
293 | config MARCH_Z14 |
294 | bool "IBM z14" | |
295 | select HAVE_MARCH_Z14_FEATURES | |
296 | help | |
297 | Select this to enable optimizations for IBM z14 (3906 series). | |
298 | The kernel will be slightly faster but will not work on older | |
299 | machines. | |
300 | ||
843c48fd | 301 | endchoice |
1da177e4 | 302 | |
1db9e051 HC |
303 | config MARCH_Z900_TUNE |
304 | def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT | |
305 | ||
306 | config MARCH_Z990_TUNE | |
307 | def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT | |
308 | ||
309 | config MARCH_Z9_109_TUNE | |
310 | def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT | |
311 | ||
312 | config MARCH_Z10_TUNE | |
313 | def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT | |
314 | ||
315 | config MARCH_Z196_TUNE | |
316 | def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT | |
317 | ||
318 | config MARCH_ZEC12_TUNE | |
319 | def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT | |
320 | ||
f8b2dcbd MS |
321 | config MARCH_Z13_TUNE |
322 | def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT | |
323 | ||
6997c323 MS |
324 | config MARCH_Z14_TUNE |
325 | def_bool TUNE_Z14 || MARCH_Z14 && TUNE_DEFAULT | |
326 | ||
1db9e051 HC |
327 | choice |
328 | prompt "Tune code generation" | |
329 | default TUNE_DEFAULT | |
330 | help | |
331 | Cause the compiler to tune (-mtune) the generated code for a machine. | |
332 | This will make the code run faster on the selected machine but | |
333 | somewhat slower on other machines. | |
334 | This option only changes how the compiler emits instructions, not the | |
335 | selection of instructions itself, so the resulting kernel will run on | |
336 | all other machines. | |
337 | ||
338 | config TUNE_DEFAULT | |
339 | bool "Default" | |
340 | help | |
341 | Tune the generated code for the target processor for which the kernel | |
342 | will be compiled. | |
343 | ||
1db9e051 HC |
344 | config TUNE_Z900 |
345 | bool "IBM zSeries model z800 and z900" | |
346 | ||
347 | config TUNE_Z990 | |
348 | bool "IBM zSeries model z890 and z990" | |
349 | ||
350 | config TUNE_Z9_109 | |
351 | bool "IBM System z9" | |
352 | ||
353 | config TUNE_Z10 | |
354 | bool "IBM System z10" | |
355 | ||
356 | config TUNE_Z196 | |
357 | bool "IBM zEnterprise 114 and 196" | |
358 | ||
359 | config TUNE_ZEC12 | |
360 | bool "IBM zBC12 and zEC12" | |
361 | ||
f8b2dcbd MS |
362 | config TUNE_Z13 |
363 | bool "IBM z13" | |
364 | ||
6997c323 MS |
365 | config TUNE_Z14 |
366 | bool "IBM z14" | |
367 | ||
1db9e051 HC |
368 | endchoice |
369 | ||
347a8dc3 | 370 | config 64BIT |
6f9a3c33 | 371 | def_bool y |
d9f7a745 | 372 | |
843c48fd JG |
373 | config COMPAT |
374 | def_bool y | |
375 | prompt "Kernel support for 31 bit emulation" | |
843c48fd JG |
376 | select COMPAT_BINFMT_ELF if BINFMT_ELF |
377 | select ARCH_WANT_OLD_COMPAT_IPC | |
7eddd99c | 378 | select COMPAT_OLD_SIGACTION |
2813893f | 379 | depends on MULTIUSER |
843c48fd JG |
380 | help |
381 | Select this option if you want to enable your system kernel to | |
382 | handle system-calls from ELF binaries for 31 bit ESA. This option | |
383 | (and some other stuff like libraries and such) is needed for | |
384 | executing 31 bit applications. It is safe to say "Y". | |
385 | ||
386 | config SYSVIPC_COMPAT | |
387 | def_bool y if COMPAT && SYSVIPC | |
388 | ||
1da177e4 | 389 | config SMP |
6f9a3c33 MS |
390 | def_bool y |
391 | prompt "Symmetric multi-processing support" | |
1da177e4 LT |
392 | ---help--- |
393 | This enables support for systems with more than one CPU. If you have | |
394 | a system with only one CPU, like most personal computers, say N. If | |
395 | you have a system with more than one CPU, say Y. | |
396 | ||
4a474157 | 397 | If you say N here, the kernel will run on uni- and multiprocessor |
1da177e4 LT |
398 | machines, but will use only one CPU of a multiprocessor machine. If |
399 | you say Y here, the kernel will run on many, but not all, | |
4a474157 | 400 | uniprocessor machines. On a uniprocessor machine, the kernel |
1da177e4 LT |
401 | will run faster if you say N here. |
402 | ||
03502faa AB |
403 | See also the SMP-HOWTO available at |
404 | <http://www.tldp.org/docs.html#howto>. | |
1da177e4 LT |
405 | |
406 | Even if you don't know what to do here, say Y. | |
407 | ||
408 | config NR_CPUS | |
5c75a0da HC |
409 | int "Maximum number of CPUs (2-512)" |
410 | range 2 512 | |
1da177e4 | 411 | depends on SMP |
5a79859a | 412 | default "64" |
1da177e4 LT |
413 | help |
414 | This allows you to specify the maximum number of CPUs which this | |
5c75a0da | 415 | kernel will support. The maximum supported value is 512 and the |
1da177e4 LT |
416 | minimum value which makes sense is 2. |
417 | ||
418 | This is purely to save memory - each supported CPU adds | |
419 | approximately sixteen kilobytes to the kernel image. | |
420 | ||
421 | config HOTPLUG_CPU | |
6f9a3c33 MS |
422 | def_bool y |
423 | prompt "Support for hot-pluggable CPUs" | |
1da177e4 | 424 | depends on SMP |
1da177e4 LT |
425 | help |
426 | Say Y here to be able to turn CPUs off and on. CPUs | |
427 | can be controlled through /sys/devices/system/cpu/cpu#. | |
428 | Say N if you want to disable CPU hotplug. | |
429 | ||
3a368f74 PH |
430 | # Some NUMA nodes have memory ranges that span |
431 | # other nodes. Even though a pfn is valid and | |
432 | # between a node's start and end pfns, it may not | |
433 | # reside on that node. See memmap_init_zone() | |
434 | # for details. <- They meant memory holes! | |
435 | config NODES_SPAN_OTHER_NODES | |
436 | def_bool NUMA | |
437 | ||
438 | config NUMA | |
439 | bool "NUMA support" | |
c095a949 | 440 | depends on SMP && SCHED_TOPOLOGY |
3a368f74 PH |
441 | default n |
442 | help | |
443 | Enable NUMA support | |
444 | ||
445 | This option adds NUMA support to the kernel. | |
446 | ||
447 | An operation mode can be selected by appending | |
448 | numa=<method> to the kernel command line. | |
449 | ||
450 | The default behaviour is identical to appending numa=plain to | |
451 | the command line. This will create just one node with all | |
452 | available memory and all CPUs in it. | |
453 | ||
454 | config NODES_SHIFT | |
455 | int "Maximum NUMA nodes (as a power of 2)" | |
456 | range 1 10 | |
457 | depends on NUMA | |
458 | default "4" | |
459 | help | |
460 | Specify the maximum number of NUMA nodes available on the target | |
461 | system. Increases memory reserved to accommodate various tables. | |
462 | ||
c29a7baf MH |
463 | menu "Select NUMA modes" |
464 | depends on NUMA | |
465 | ||
466 | config NUMA_EMU | |
467 | bool "NUMA emulation" | |
468 | default y | |
469 | help | |
470 | Numa emulation mode will split the available system memory into | |
471 | equal chunks which then are distributed over the configured number | |
472 | of nodes in a round-robin manner. | |
473 | ||
474 | The number of fake nodes is limited by the number of available memory | |
475 | chunks (i.e. memory size / fake size) and the number of supported | |
476 | nodes in the kernel. | |
477 | ||
478 | The CPUs are assigned to the nodes in a way that partially respects | |
479 | the original machine topology (if supported by the machine). | |
480 | Fair distribution of the CPUs is not guaranteed. | |
481 | ||
482 | config EMU_SIZE | |
483 | hex "NUMA emulation memory chunk size" | |
484 | default 0x10000000 | |
485 | range 0x400000 0x100000000 | |
486 | depends on NUMA_EMU | |
487 | help | |
488 | Select the default size by which the memory is chopped and then | |
489 | assigned to emulated NUMA nodes. | |
490 | ||
491 | This can be overridden by specifying | |
492 | ||
493 | emu_size=<n> | |
494 | ||
495 | on the kernel command line where also suffixes K, M, G, and T are | |
496 | supported. | |
497 | ||
498 | endmenu | |
9236b4dd HC |
499 | |
500 | config SCHED_SMT | |
501 | def_bool n | |
c29a7baf | 502 | |
8d11e021 | 503 | config SCHED_MC |
83a24e32 | 504 | def_bool n |
8d11e021 | 505 | |
4cb14bc8 | 506 | config SCHED_BOOK |
10ad34bc MS |
507 | def_bool n |
508 | ||
adac0f1e HC |
509 | config SCHED_DRAWER |
510 | def_bool n | |
511 | ||
10ad34bc | 512 | config SCHED_TOPOLOGY |
6f9a3c33 | 513 | def_bool y |
10ad34bc | 514 | prompt "Topology scheduler support" |
83a24e32 | 515 | depends on SMP |
10ad34bc | 516 | select SCHED_SMT |
83a24e32 | 517 | select SCHED_MC |
10ad34bc | 518 | select SCHED_BOOK |
adac0f1e | 519 | select SCHED_DRAWER |
4cb14bc8 | 520 | help |
10ad34bc MS |
521 | Topology scheduler support improves the CPU scheduler's decision |
522 | making when dealing with machines that have multi-threading, | |
523 | multiple cores or multiple books. | |
4cb14bc8 | 524 | |
843c48fd JG |
525 | source kernel/Kconfig.preempt |
526 | ||
843c48fd | 527 | source kernel/Kconfig.hz |
1da177e4 | 528 | |
4c637cd8 HF |
529 | config ARCH_RANDOM |
530 | def_bool y | |
531 | prompt "s390 architectural random number generation API" | |
532 | help | |
533 | Enable the s390 architectural random number generation API | |
534 | to provide random data for all consumers within the Linux | |
535 | kernel. | |
536 | ||
537 | When enabled the arch_random_* functions declared in linux/random.h | |
538 | are implemented. The implementation is based on the s390 CPACF | |
539 | instruction subfunction TRNG which provides a real true random | |
540 | number generator. | |
541 | ||
542 | If unsure, say Y. | |
543 | ||
843c48fd | 544 | endmenu |
1da177e4 | 545 | |
843c48fd | 546 | menu "Memory setup" |
1d057720 | 547 | |
843c48fd | 548 | config ARCH_SPARSEMEM_ENABLE |
6f9a3c33 | 549 | def_bool y |
843c48fd JG |
550 | select SPARSEMEM_VMEMMAP_ENABLE |
551 | select SPARSEMEM_VMEMMAP | |
e65e1fc2 | 552 | |
843c48fd JG |
553 | config ARCH_SPARSEMEM_DEFAULT |
554 | def_bool y | |
1da177e4 | 555 | |
843c48fd JG |
556 | config ARCH_SELECT_MEMORY_MODEL |
557 | def_bool y | |
1da177e4 | 558 | |
843c48fd JG |
559 | config ARCH_ENABLE_MEMORY_HOTPLUG |
560 | def_bool y if SPARSEMEM | |
0efa4703 | 561 | |
843c48fd JG |
562 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
563 | def_bool y | |
e37f50e1 | 564 | |
ec66ad66 MS |
565 | config ARCH_ENABLE_SPLIT_PMD_PTLOCK |
566 | def_bool y | |
ec66ad66 | 567 | |
843c48fd JG |
568 | config FORCE_MAX_ZONEORDER |
569 | int | |
570 | default "9" | |
f861e405 | 571 | |
843c48fd | 572 | source "mm/Kconfig" |
1da177e4 | 573 | |
b8402b95 HC |
574 | config MAX_PHYSMEM_BITS |
575 | int "Maximum size of supported physical memory in bits (42-53)" | |
576 | range 42 53 | |
577 | default "46" | |
578 | help | |
579 | This option specifies the maximum supported size of physical memory | |
580 | in bits. Supported is any size between 2^42 (4TB) and 2^53 (8PB). | |
581 | Increasing the number of bits also increases the kernel image size. | |
582 | By default 46 bits (64TB) are supported. | |
583 | ||
1da177e4 | 584 | config PACK_STACK |
6f9a3c33 MS |
585 | def_bool y |
586 | prompt "Pack kernel stack" | |
1da177e4 LT |
587 | help |
588 | This option enables the compiler option -mkernel-backchain if it | |
589 | is available. If the option is available the compiler supports | |
590 | the new stack layout which dramatically reduces the minimum stack | |
591 | frame size. With an old compiler a non-leaf function needs a | |
592 | minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With | |
593 | -mkernel-backchain the minimum size drops to 16 byte on 31 bit | |
594 | and 24 byte on 64 bit. | |
595 | ||
596 | Say Y if you are unsure. | |
597 | ||
1da177e4 | 598 | config CHECK_STACK |
6f9a3c33 MS |
599 | def_bool y |
600 | prompt "Detect kernel stack overflow" | |
1da177e4 LT |
601 | help |
602 | This option enables the compiler option -mstack-guard and | |
603 | -mstack-size if they are available. If the compiler supports them | |
604 | it will emit additional code to each function prolog to trigger | |
605 | an illegal operation if the kernel stack is about to overflow. | |
606 | ||
607 | Say N if you are unsure. | |
608 | ||
609 | config STACK_GUARD | |
610 | int "Size of the guard area (128-1024)" | |
611 | range 128 1024 | |
612 | depends on CHECK_STACK | |
613 | default "256" | |
614 | help | |
615 | This allows you to specify the size of the guard area at the lower | |
616 | end of the kernel stack. If the kernel stack points into the guard | |
617 | area on function entry an illegal operation is triggered. The size | |
618 | needs to be a power of 2. Please keep in mind that the size of an | |
619 | interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit. | |
620 | The minimum size for the stack guard should be 256 for 31 bit and | |
621 | 512 for 64 bit. | |
622 | ||
2c190da4 | 623 | config WARN_DYNAMIC_STACK |
6f9a3c33 | 624 | def_bool n |
2c190da4 | 625 | prompt "Emit compiler warnings for function with dynamic stack usage" |
1da177e4 | 626 | help |
2c190da4 JG |
627 | This option enables the compiler option -mwarn-dynamicstack. If the |
628 | compiler supports this options generates warnings for functions | |
629 | that dynamically allocate stack space using alloca. | |
1da177e4 LT |
630 | |
631 | Say N if you are unsure. | |
632 | ||
843c48fd | 633 | endmenu |
3f22ab27 | 634 | |
843c48fd | 635 | menu "I/O subsystem" |
1da177e4 | 636 | |
1da177e4 | 637 | config QDIO |
6f9a3c33 MS |
638 | def_tristate y |
639 | prompt "QDIO support" | |
1da177e4 | 640 | ---help--- |
8129ee16 | 641 | This driver provides the Queued Direct I/O base support for |
efca13bc | 642 | IBM System z. |
1da177e4 LT |
643 | |
644 | To compile this driver as a module, choose M here: the | |
645 | module will be called qdio. | |
646 | ||
647 | If unsure, say Y. | |
648 | ||
c8717a3d JG |
649 | menuconfig PCI |
650 | bool "PCI support" | |
c8717a3d | 651 | select PCI_MSI |
8128f23c | 652 | select IOMMU_SUPPORT |
c8717a3d JG |
653 | help |
654 | Enable PCI support. | |
655 | ||
656 | if PCI | |
657 | ||
658 | config PCI_NR_FUNCTIONS | |
659 | int "Maximum number of PCI functions (1-4096)" | |
660 | range 1 4096 | |
b18601b0 | 661 | default "128" |
c8717a3d JG |
662 | help |
663 | This allows you to specify the maximum number of PCI functions which | |
664 | this kernel will support. | |
665 | ||
666 | source "drivers/pci/Kconfig" | |
c8717a3d JG |
667 | |
668 | endif # PCI | |
669 | ||
670 | config PCI_DOMAINS | |
671 | def_bool PCI | |
672 | ||
673 | config HAS_IOMEM | |
674 | def_bool PCI | |
675 | ||
676 | config IOMMU_HELPER | |
677 | def_bool PCI | |
678 | ||
c8717a3d JG |
679 | config NEED_SG_DMA_LENGTH |
680 | def_bool PCI | |
681 | ||
91630032 JG |
682 | config NEED_DMA_MAP_STATE |
683 | def_bool PCI | |
684 | ||
9d92a7e1 | 685 | config CHSC_SCH |
d9c11b1e | 686 | def_tristate m |
6f9a3c33 | 687 | prompt "Support for CHSC subchannels" |
9d92a7e1 CH |
688 | help |
689 | This driver allows usage of CHSC subchannels. A CHSC subchannel | |
690 | is usually present on LPAR only. | |
691 | The driver creates a device /dev/chsc, which may be used to | |
692 | obtain I/O configuration information about the machine and | |
693 | to issue asynchronous chsc commands (DANGEROUS). | |
694 | You will usually only want to use this interface on a special | |
695 | LPAR designated for system management. | |
696 | ||
697 | To compile this driver as a module, choose M here: the | |
698 | module will be called chsc_sch. | |
699 | ||
700 | If unsure, say N. | |
701 | ||
1d1c8f78 SO |
702 | config SCM_BUS |
703 | def_bool y | |
1d1c8f78 SO |
704 | prompt "SCM bus driver" |
705 | help | |
706 | Bus driver for Storage Class Memory. | |
707 | ||
eadb86ab SO |
708 | config EADM_SCH |
709 | def_tristate m | |
710 | prompt "Support for EADM subchannels" | |
711 | depends on SCM_BUS | |
712 | help | |
713 | This driver allows usage of EADM subchannels. EADM subchannels act | |
714 | as a communication vehicle for SCM increments. | |
715 | ||
716 | To compile this driver as a module, choose M here: the | |
717 | module will be called eadm_sch. | |
718 | ||
63f1934d DJS |
719 | config VFIO_CCW |
720 | def_tristate n | |
721 | prompt "Support for VFIO-CCW subchannels" | |
84cd8fc4 | 722 | depends on S390_CCW_IOMMU && VFIO_MDEV |
63f1934d DJS |
723 | help |
724 | This driver allows usage of I/O subchannels via VFIO-CCW. | |
725 | ||
726 | To compile this driver as a module, choose M here: the | |
727 | module will be called vfio_ccw. | |
728 | ||
843c48fd JG |
729 | endmenu |
730 | ||
731 | menu "Dump support" | |
732 | ||
733 | config CRASH_DUMP | |
734 | bool "kernel crash dumps" | |
5a79859a | 735 | depends on SMP |
843c48fd JG |
736 | select KEXEC |
737 | help | |
738 | Generate crash dump after being started by kexec. | |
739 | Crash dump kernels are loaded in the main kernel with kexec-tools | |
740 | into a specially reserved region and then later executed after | |
741 | a crash by kdump/kexec. | |
843c48fd | 742 | Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this. |
bf28a597 MH |
743 | This option also enables s390 zfcpdump. |
744 | See also <file:Documentation/s390/zfcpdump.txt> | |
843c48fd JG |
745 | |
746 | endmenu | |
747 | ||
748 | menu "Executable file formats / Emulations" | |
1da177e4 | 749 | |
1da177e4 LT |
750 | source "fs/Kconfig.binfmt" |
751 | ||
843c48fd JG |
752 | config SECCOMP |
753 | def_bool y | |
754 | prompt "Enable seccomp to safely compute untrusted bytecode" | |
755 | depends on PROC_FS | |
756 | help | |
757 | This kernel feature is useful for number crunching applications | |
758 | that may need to compute untrusted bytecode during their | |
759 | execution. By using pipes or other transports made available to | |
760 | the process as file descriptors supporting the read/write | |
761 | syscalls, it's possible to isolate those applications in | |
762 | their own address space using seccomp. Once seccomp is | |
763 | enabled via /proc/<pid>/seccomp, it cannot be disabled | |
764 | and the task is only allowed to execute a few safe syscalls | |
765 | defined by each seccomp mode. | |
766 | ||
767 | If unsure, say Y. | |
768 | ||
769 | endmenu | |
770 | ||
771 | menu "Power Management" | |
772 | ||
773 | config ARCH_HIBERNATION_POSSIBLE | |
5a79859a | 774 | def_bool y |
843c48fd JG |
775 | |
776 | source "kernel/power/Kconfig" | |
777 | ||
778 | endmenu | |
779 | ||
780 | source "net/Kconfig" | |
781 | ||
782 | config PCMCIA | |
783 | def_bool n | |
784 | ||
785 | config CCW | |
786 | def_bool y | |
787 | ||
788 | source "drivers/Kconfig" | |
789 | ||
790 | source "fs/Kconfig" | |
791 | ||
792 | source "arch/s390/Kconfig.debug" | |
793 | ||
794 | source "security/Kconfig" | |
795 | ||
796 | source "crypto/Kconfig" | |
797 | ||
798 | source "lib/Kconfig" | |
799 | ||
800 | menu "Virtualization" | |
684de39b | 801 | |
1da177e4 | 802 | config PFAULT |
6f9a3c33 MS |
803 | def_bool y |
804 | prompt "Pseudo page fault support" | |
1da177e4 LT |
805 | help |
806 | Select this option, if you want to use PFAULT pseudo page fault | |
807 | handling under VM. If running native or in LPAR, this option | |
808 | has no effect. If your VM does not support PFAULT, PAGEEX | |
809 | pseudo page fault handling will be used. | |
810 | Note that VM 4.2 supports PFAULT but has a bug in its | |
811 | implementation that causes some problems. | |
812 | Everybody who wants to run Linux under VM != VM4.2 should select | |
813 | this option. | |
814 | ||
1da177e4 | 815 | config CMM |
6f9a3c33 MS |
816 | def_tristate n |
817 | prompt "Cooperative memory management" | |
1da177e4 LT |
818 | help |
819 | Select this option, if you want to enable the kernel interface | |
820 | to reduce the memory size of the system. This is accomplished | |
821 | by allocating pages of memory and put them "on hold". This only | |
822 | makes sense for a system running under VM where the unused pages | |
823 | will be reused by VM for other guest systems. The interface | |
824 | allows an external monitor to balance memory of many systems. | |
825 | Everybody who wants to run Linux under VM should select this | |
826 | option. | |
827 | ||
1da177e4 | 828 | config CMM_IUCV |
6f9a3c33 MS |
829 | def_bool y |
830 | prompt "IUCV special message interface to cooperative memory management" | |
1da177e4 LT |
831 | depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV) |
832 | help | |
833 | Select this option to enable the special message interface to | |
834 | the cooperative memory management. | |
835 | ||
1da177e4 | 836 | config APPLDATA_BASE |
6f9a3c33 MS |
837 | def_bool n |
838 | prompt "Linux - VM Monitor Stream, base infrastructure" | |
c185b783 | 839 | depends on PROC_FS |
1da177e4 LT |
840 | help |
841 | This provides a kernel interface for creating and updating z/VM APPLDATA | |
842 | monitor records. The monitor records are updated at certain time | |
843 | intervals, once the timer is started. | |
844 | Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer, | |
845 | i.e. enables or disables monitoring on the Linux side. | |
846 | A custom interval value (in seconds) can be written to | |
847 | /proc/appldata/interval. | |
848 | ||
849 | Defaults are 60 seconds interval and timer off. | |
850 | The /proc entries can also be read from, showing the current settings. | |
851 | ||
852 | config APPLDATA_MEM | |
6f9a3c33 MS |
853 | def_tristate m |
854 | prompt "Monitor memory management statistics" | |
62fb2ba3 | 855 | depends on APPLDATA_BASE && VM_EVENT_COUNTERS |
1da177e4 LT |
856 | help |
857 | This provides memory management related data to the Linux - VM Monitor | |
858 | Stream, like paging/swapping rate, memory utilisation, etc. | |
859 | Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM | |
860 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
861 | on the z/VM side. | |
862 | ||
863 | Default is disabled. | |
864 | The /proc entry can also be read from, showing the current settings. | |
865 | ||
866 | This can also be compiled as a module, which will be called | |
867 | appldata_mem.o. | |
868 | ||
869 | config APPLDATA_OS | |
6f9a3c33 MS |
870 | def_tristate m |
871 | prompt "Monitor OS statistics" | |
1da177e4 LT |
872 | depends on APPLDATA_BASE |
873 | help | |
874 | This provides OS related data to the Linux - VM Monitor Stream, like | |
875 | CPU utilisation, etc. | |
876 | Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM | |
877 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
878 | on the z/VM side. | |
879 | ||
880 | Default is disabled. | |
881 | This can also be compiled as a module, which will be called | |
882 | appldata_os.o. | |
883 | ||
884 | config APPLDATA_NET_SUM | |
6f9a3c33 MS |
885 | def_tristate m |
886 | prompt "Monitor overall network statistics" | |
70193af9 | 887 | depends on APPLDATA_BASE && NET |
1da177e4 LT |
888 | help |
889 | This provides network related data to the Linux - VM Monitor Stream, | |
890 | currently there is only a total sum of network I/O statistics, no | |
891 | per-interface data. | |
892 | Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM | |
893 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
894 | on the z/VM side. | |
895 | ||
896 | Default is disabled. | |
897 | This can also be compiled as a module, which will be called | |
898 | appldata_net_sum.o. | |
899 | ||
24bbb1fa | 900 | config S390_HYPFS_FS |
6f9a3c33 MS |
901 | def_bool y |
902 | prompt "s390 hypervisor file system support" | |
24bbb1fa | 903 | select SYS_HYPERVISOR |
24bbb1fa MH |
904 | help |
905 | This is a virtual file system intended to provide accounting | |
906 | information in an s390 hypervisor environment. | |
907 | ||
843c48fd | 908 | source "arch/s390/kvm/Kconfig" |
411ed322 | 909 | |
fa587743 | 910 | config S390_GUEST |
6f9a3c33 | 911 | def_bool y |
510cf5a6 | 912 | prompt "s390 support for virtio devices" |
79b6f7fb | 913 | select TTY |
80629b0b | 914 | select VIRTUALIZATION |
fa587743 | 915 | select VIRTIO |
faeba830 | 916 | select VIRTIO_CONSOLE |
fa587743 | 917 | help |
bdd1fc27 CH |
918 | Enabling this option adds support for virtio based paravirtual device |
919 | drivers on s390. | |
1da177e4 | 920 | |
20766c08 | 921 | Select this option if you want to run the kernel as a guest under |
bdd1fc27 | 922 | the KVM hypervisor. |
155af2f9 HJP |
923 | |
924 | endmenu |