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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 |
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 |
1f7ab7ad | 125 | select GENERIC_CPU_VULNERABILITIES |
746479cd | 126 | select GENERIC_FIND_FIRST_BIT |
e80e7813 | 127 | select GENERIC_SMP_IDLE_THREAD |
79c74ecb | 128 | select GENERIC_TIME_VSYSCALL |
0e0d04a8 | 129 | select HAVE_ALIGNED_STRUCT_PAGE if SLUB |
7a017721 | 130 | select HAVE_ARCH_AUDITSYSCALL |
5a79859a | 131 | select HAVE_ARCH_JUMP_LABEL |
fff7fb0b | 132 | select CPU_NO_EFFICIENT_FFS if !HAVE_MARCH_Z9_109_FEATURES |
c63cb468 | 133 | select HAVE_ARCH_SECCOMP_FILTER |
5614dd92 | 134 | select HAVE_ARCH_SOFT_DIRTY |
0e0d04a8 | 135 | select HAVE_ARCH_TRACEHOOK |
5a79859a | 136 | select HAVE_ARCH_TRANSPARENT_HUGEPAGE |
6077776b | 137 | select HAVE_EBPF_JIT if PACK_STACK && HAVE_MARCH_Z196_FEATURES |
0e0d04a8 HC |
138 | select HAVE_CMPXCHG_DOUBLE |
139 | select HAVE_CMPXCHG_LOCAL | |
f50c0e63 | 140 | select HAVE_COPY_THREAD_TLS |
0e0d04a8 | 141 | select HAVE_DEBUG_KMEMLEAK |
e82becfc | 142 | select HAVE_DMA_API_DEBUG |
e1231b0e | 143 | select HAVE_DMA_CONTIGUOUS |
7844572c | 144 | select DMA_NOOP_OPS |
5a79859a HC |
145 | select HAVE_DYNAMIC_FTRACE |
146 | select HAVE_DYNAMIC_FTRACE_WITH_REGS | |
9078a549 | 147 | select HAVE_EFFICIENT_UNALIGNED_ACCESS |
0e0d04a8 | 148 | select HAVE_FTRACE_MCOUNT_RECORD |
5a79859a HC |
149 | select HAVE_FUNCTION_GRAPH_TRACER |
150 | select HAVE_FUNCTION_TRACER | |
03b8c7b6 | 151 | select HAVE_FUTEX_CMPXCHG if FUTEX |
dfd4c493 | 152 | select HAVE_GCC_PLUGINS |
0e0d04a8 HC |
153 | select HAVE_KERNEL_BZIP2 |
154 | select HAVE_KERNEL_GZIP | |
8e2872ce | 155 | select HAVE_KERNEL_LZ4 |
0e0d04a8 HC |
156 | select HAVE_KERNEL_LZMA |
157 | select HAVE_KERNEL_LZO | |
158 | select HAVE_KERNEL_XZ | |
159 | select HAVE_KPROBES | |
160 | select HAVE_KRETPROBES | |
5a79859a | 161 | select HAVE_KVM |
21042d43 | 162 | select HAVE_LIVEPATCH |
c33eff60 HC |
163 | select HAVE_PERF_REGS |
164 | select HAVE_PERF_USER_STACK_DUMP | |
0e0d04a8 HC |
165 | select HAVE_MEMBLOCK |
166 | select HAVE_MEMBLOCK_NODE_MAP | |
50be6345 | 167 | select HAVE_MEMBLOCK_PHYS_MAP |
786d35d4 | 168 | select HAVE_MOD_ARCH_SPECIFIC |
0e0d04a8 HC |
169 | select HAVE_OPROFILE |
170 | select HAVE_PERF_EVENTS | |
171 | select HAVE_REGS_AND_STACK_ACCESS_API | |
172 | select HAVE_SYSCALL_TRACEPOINTS | |
0e0d04a8 | 173 | select HAVE_VIRT_CPU_ACCOUNTING |
786d35d4 | 174 | select MODULES_USE_ELF_RELA |
50be6345 | 175 | select NO_BOOTMEM |
7eddd99c | 176 | select OLD_SIGACTION |
93bead43 | 177 | select OLD_SIGSUSPEND3 |
bb98f396 | 178 | select SPARSE_IRQ |
0e0d04a8 | 179 | select SYSCTL_EXCEPTION_TRACE |
d5c352cd | 180 | select THREAD_INFO_IN_TASK |
0563416b | 181 | select TTY |
0e0d04a8 | 182 | select VIRT_CPU_ACCOUNTING |
40565b5a | 183 | select ARCH_HAS_SCALED_CPUTIME |
93bead43 | 184 | select VIRT_TO_BUS |
42a0bb3f | 185 | select HAVE_NMI |
3a368f74 | 186 | |
1da177e4 | 187 | |
fca3e357 | 188 | config SCHED_OMIT_FRAME_POINTER |
6f9a3c33 | 189 | def_bool y |
fca3e357 | 190 | |
c81956c9 KS |
191 | config PGTABLE_LEVELS |
192 | int | |
1aea9b3f | 193 | default 5 |
c81956c9 | 194 | |
1da177e4 LT |
195 | source "init/Kconfig" |
196 | ||
dc52ddc0 MH |
197 | source "kernel/Kconfig.freezer" |
198 | ||
21042d43 JS |
199 | source "kernel/livepatch/Kconfig" |
200 | ||
843c48fd JG |
201 | menu "Processor type and features" |
202 | ||
203 | config HAVE_MARCH_Z900_FEATURES | |
204 | def_bool n | |
205 | ||
206 | config HAVE_MARCH_Z990_FEATURES | |
207 | def_bool n | |
208 | select HAVE_MARCH_Z900_FEATURES | |
209 | ||
210 | config HAVE_MARCH_Z9_109_FEATURES | |
211 | def_bool n | |
212 | select HAVE_MARCH_Z990_FEATURES | |
213 | ||
214 | config HAVE_MARCH_Z10_FEATURES | |
215 | def_bool n | |
216 | select HAVE_MARCH_Z9_109_FEATURES | |
217 | ||
218 | config HAVE_MARCH_Z196_FEATURES | |
219 | def_bool n | |
220 | select HAVE_MARCH_Z10_FEATURES | |
221 | ||
991c1505 HC |
222 | config HAVE_MARCH_ZEC12_FEATURES |
223 | def_bool n | |
224 | select HAVE_MARCH_Z196_FEATURES | |
225 | ||
f8b2dcbd MS |
226 | config HAVE_MARCH_Z13_FEATURES |
227 | def_bool n | |
228 | select HAVE_MARCH_ZEC12_FEATURES | |
229 | ||
6997c323 MS |
230 | config HAVE_MARCH_Z14_FEATURES |
231 | def_bool n | |
232 | select HAVE_MARCH_Z13_FEATURES | |
233 | ||
843c48fd JG |
234 | choice |
235 | prompt "Processor type" | |
7072276e | 236 | default MARCH_Z196 |
1da177e4 | 237 | |
843c48fd JG |
238 | config MARCH_Z900 |
239 | bool "IBM zSeries model z800 and z900" | |
5a79859a | 240 | select HAVE_MARCH_Z900_FEATURES |
843c48fd JG |
241 | help |
242 | Select this to enable optimizations for model z800/z900 (2064 and | |
243 | 2066 series). This will enable some optimizations that are not | |
244 | available on older ESA/390 (31 Bit) only CPUs. | |
245 | ||
246 | config MARCH_Z990 | |
247 | bool "IBM zSeries model z890 and z990" | |
5a79859a | 248 | select HAVE_MARCH_Z990_FEATURES |
843c48fd JG |
249 | help |
250 | Select this to enable optimizations for model z890/z990 (2084 and | |
251 | 2086 series). The kernel will be slightly faster but will not work | |
252 | on older machines. | |
253 | ||
254 | config MARCH_Z9_109 | |
255 | bool "IBM System z9" | |
5a79859a | 256 | select HAVE_MARCH_Z9_109_FEATURES |
843c48fd JG |
257 | help |
258 | Select this to enable optimizations for IBM System z9 (2094 and | |
259 | 2096 series). The kernel will be slightly faster but will not work | |
260 | on older machines. | |
261 | ||
262 | config MARCH_Z10 | |
263 | bool "IBM System z10" | |
5a79859a | 264 | select HAVE_MARCH_Z10_FEATURES |
843c48fd JG |
265 | help |
266 | Select this to enable optimizations for IBM System z10 (2097 and | |
267 | 2098 series). The kernel will be slightly faster but will not work | |
268 | on older machines. | |
269 | ||
270 | config MARCH_Z196 | |
271 | bool "IBM zEnterprise 114 and 196" | |
5a79859a | 272 | select HAVE_MARCH_Z196_FEATURES |
843c48fd JG |
273 | help |
274 | Select this to enable optimizations for IBM zEnterprise 114 and 196 | |
275 | (2818 and 2817 series). The kernel will be slightly faster but will | |
276 | not work on older machines. | |
1da177e4 | 277 | |
991c1505 | 278 | config MARCH_ZEC12 |
59471227 | 279 | bool "IBM zBC12 and zEC12" |
5a79859a | 280 | select HAVE_MARCH_ZEC12_FEATURES |
991c1505 | 281 | help |
59471227 HC |
282 | Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and |
283 | 2827 series). The kernel will be slightly faster but will not work on | |
284 | older machines. | |
991c1505 | 285 | |
f8b2dcbd | 286 | config MARCH_Z13 |
bb3aa614 | 287 | bool "IBM z13s and z13" |
5a79859a | 288 | select HAVE_MARCH_Z13_FEATURES |
f8b2dcbd | 289 | help |
bb3aa614 HC |
290 | Select this to enable optimizations for IBM z13s and z13 (2965 and |
291 | 2964 series). The kernel will be slightly faster but will not work on | |
292 | older machines. | |
f8b2dcbd | 293 | |
6997c323 | 294 | config MARCH_Z14 |
734fce8d | 295 | bool "IBM z14 ZR1 and z14" |
6997c323 MS |
296 | select HAVE_MARCH_Z14_FEATURES |
297 | help | |
734fce8d HC |
298 | Select this to enable optimizations for IBM z14 ZR1 and z14 (3907 |
299 | and 3906 series). The kernel will be slightly faster but will not | |
300 | work on older machines. | |
6997c323 | 301 | |
843c48fd | 302 | endchoice |
1da177e4 | 303 | |
1db9e051 HC |
304 | config MARCH_Z900_TUNE |
305 | def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT | |
306 | ||
307 | config MARCH_Z990_TUNE | |
308 | def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT | |
309 | ||
310 | config MARCH_Z9_109_TUNE | |
311 | def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT | |
312 | ||
313 | config MARCH_Z10_TUNE | |
314 | def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT | |
315 | ||
316 | config MARCH_Z196_TUNE | |
317 | def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT | |
318 | ||
319 | config MARCH_ZEC12_TUNE | |
320 | def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT | |
321 | ||
f8b2dcbd MS |
322 | config MARCH_Z13_TUNE |
323 | def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT | |
324 | ||
6997c323 MS |
325 | config MARCH_Z14_TUNE |
326 | def_bool TUNE_Z14 || MARCH_Z14 && TUNE_DEFAULT | |
327 | ||
1db9e051 HC |
328 | choice |
329 | prompt "Tune code generation" | |
330 | default TUNE_DEFAULT | |
331 | help | |
332 | Cause the compiler to tune (-mtune) the generated code for a machine. | |
333 | This will make the code run faster on the selected machine but | |
334 | somewhat slower on other machines. | |
335 | This option only changes how the compiler emits instructions, not the | |
336 | selection of instructions itself, so the resulting kernel will run on | |
337 | all other machines. | |
338 | ||
339 | config TUNE_DEFAULT | |
340 | bool "Default" | |
341 | help | |
342 | Tune the generated code for the target processor for which the kernel | |
343 | will be compiled. | |
344 | ||
1db9e051 HC |
345 | config TUNE_Z900 |
346 | bool "IBM zSeries model z800 and z900" | |
347 | ||
348 | config TUNE_Z990 | |
349 | bool "IBM zSeries model z890 and z990" | |
350 | ||
351 | config TUNE_Z9_109 | |
352 | bool "IBM System z9" | |
353 | ||
354 | config TUNE_Z10 | |
355 | bool "IBM System z10" | |
356 | ||
357 | config TUNE_Z196 | |
358 | bool "IBM zEnterprise 114 and 196" | |
359 | ||
360 | config TUNE_ZEC12 | |
361 | bool "IBM zBC12 and zEC12" | |
362 | ||
f8b2dcbd MS |
363 | config TUNE_Z13 |
364 | bool "IBM z13" | |
365 | ||
6997c323 MS |
366 | config TUNE_Z14 |
367 | bool "IBM z14" | |
368 | ||
1db9e051 HC |
369 | endchoice |
370 | ||
347a8dc3 | 371 | config 64BIT |
6f9a3c33 | 372 | def_bool y |
d9f7a745 | 373 | |
843c48fd JG |
374 | config COMPAT |
375 | def_bool y | |
376 | prompt "Kernel support for 31 bit emulation" | |
843c48fd JG |
377 | select COMPAT_BINFMT_ELF if BINFMT_ELF |
378 | select ARCH_WANT_OLD_COMPAT_IPC | |
7eddd99c | 379 | select COMPAT_OLD_SIGACTION |
2813893f | 380 | depends on MULTIUSER |
843c48fd JG |
381 | help |
382 | Select this option if you want to enable your system kernel to | |
383 | handle system-calls from ELF binaries for 31 bit ESA. This option | |
384 | (and some other stuff like libraries and such) is needed for | |
385 | executing 31 bit applications. It is safe to say "Y". | |
386 | ||
387 | config SYSVIPC_COMPAT | |
388 | def_bool y if COMPAT && SYSVIPC | |
389 | ||
1da177e4 | 390 | config SMP |
6f9a3c33 MS |
391 | def_bool y |
392 | prompt "Symmetric multi-processing support" | |
1da177e4 LT |
393 | ---help--- |
394 | This enables support for systems with more than one CPU. If you have | |
395 | a system with only one CPU, like most personal computers, say N. If | |
396 | you have a system with more than one CPU, say Y. | |
397 | ||
4a474157 | 398 | If you say N here, the kernel will run on uni- and multiprocessor |
1da177e4 LT |
399 | machines, but will use only one CPU of a multiprocessor machine. If |
400 | you say Y here, the kernel will run on many, but not all, | |
4a474157 | 401 | uniprocessor machines. On a uniprocessor machine, the kernel |
1da177e4 LT |
402 | will run faster if you say N here. |
403 | ||
03502faa AB |
404 | See also the SMP-HOWTO available at |
405 | <http://www.tldp.org/docs.html#howto>. | |
1da177e4 LT |
406 | |
407 | Even if you don't know what to do here, say Y. | |
408 | ||
409 | config NR_CPUS | |
5c75a0da HC |
410 | int "Maximum number of CPUs (2-512)" |
411 | range 2 512 | |
1da177e4 | 412 | depends on SMP |
5a79859a | 413 | default "64" |
1da177e4 LT |
414 | help |
415 | This allows you to specify the maximum number of CPUs which this | |
5c75a0da | 416 | kernel will support. The maximum supported value is 512 and the |
1da177e4 LT |
417 | minimum value which makes sense is 2. |
418 | ||
419 | This is purely to save memory - each supported CPU adds | |
420 | approximately sixteen kilobytes to the kernel image. | |
421 | ||
422 | config HOTPLUG_CPU | |
6f9a3c33 MS |
423 | def_bool y |
424 | prompt "Support for hot-pluggable CPUs" | |
1da177e4 | 425 | depends on SMP |
1da177e4 LT |
426 | help |
427 | Say Y here to be able to turn CPUs off and on. CPUs | |
428 | can be controlled through /sys/devices/system/cpu/cpu#. | |
429 | Say N if you want to disable CPU hotplug. | |
430 | ||
3a368f74 PH |
431 | # Some NUMA nodes have memory ranges that span |
432 | # other nodes. Even though a pfn is valid and | |
433 | # between a node's start and end pfns, it may not | |
434 | # reside on that node. See memmap_init_zone() | |
435 | # for details. <- They meant memory holes! | |
436 | config NODES_SPAN_OTHER_NODES | |
437 | def_bool NUMA | |
438 | ||
439 | config NUMA | |
440 | bool "NUMA support" | |
c095a949 | 441 | depends on SMP && SCHED_TOPOLOGY |
3a368f74 PH |
442 | default n |
443 | help | |
444 | Enable NUMA support | |
445 | ||
446 | This option adds NUMA support to the kernel. | |
447 | ||
448 | An operation mode can be selected by appending | |
449 | numa=<method> to the kernel command line. | |
450 | ||
451 | The default behaviour is identical to appending numa=plain to | |
452 | the command line. This will create just one node with all | |
453 | available memory and all CPUs in it. | |
454 | ||
455 | config NODES_SHIFT | |
456 | int "Maximum NUMA nodes (as a power of 2)" | |
457 | range 1 10 | |
458 | depends on NUMA | |
459 | default "4" | |
460 | help | |
461 | Specify the maximum number of NUMA nodes available on the target | |
462 | system. Increases memory reserved to accommodate various tables. | |
463 | ||
c29a7baf MH |
464 | menu "Select NUMA modes" |
465 | depends on NUMA | |
466 | ||
467 | config NUMA_EMU | |
468 | bool "NUMA emulation" | |
469 | default y | |
470 | help | |
471 | Numa emulation mode will split the available system memory into | |
472 | equal chunks which then are distributed over the configured number | |
473 | of nodes in a round-robin manner. | |
474 | ||
475 | The number of fake nodes is limited by the number of available memory | |
476 | chunks (i.e. memory size / fake size) and the number of supported | |
477 | nodes in the kernel. | |
478 | ||
479 | The CPUs are assigned to the nodes in a way that partially respects | |
480 | the original machine topology (if supported by the machine). | |
481 | Fair distribution of the CPUs is not guaranteed. | |
482 | ||
483 | config EMU_SIZE | |
484 | hex "NUMA emulation memory chunk size" | |
485 | default 0x10000000 | |
486 | range 0x400000 0x100000000 | |
487 | depends on NUMA_EMU | |
488 | help | |
489 | Select the default size by which the memory is chopped and then | |
490 | assigned to emulated NUMA nodes. | |
491 | ||
492 | This can be overridden by specifying | |
493 | ||
494 | emu_size=<n> | |
495 | ||
496 | on the kernel command line where also suffixes K, M, G, and T are | |
497 | supported. | |
498 | ||
499 | endmenu | |
9236b4dd HC |
500 | |
501 | config SCHED_SMT | |
502 | def_bool n | |
c29a7baf | 503 | |
8d11e021 | 504 | config SCHED_MC |
83a24e32 | 505 | def_bool n |
8d11e021 | 506 | |
4cb14bc8 | 507 | config SCHED_BOOK |
10ad34bc MS |
508 | def_bool n |
509 | ||
adac0f1e HC |
510 | config SCHED_DRAWER |
511 | def_bool n | |
512 | ||
10ad34bc | 513 | config SCHED_TOPOLOGY |
6f9a3c33 | 514 | def_bool y |
10ad34bc | 515 | prompt "Topology scheduler support" |
83a24e32 | 516 | depends on SMP |
10ad34bc | 517 | select SCHED_SMT |
83a24e32 | 518 | select SCHED_MC |
10ad34bc | 519 | select SCHED_BOOK |
adac0f1e | 520 | select SCHED_DRAWER |
4cb14bc8 | 521 | help |
10ad34bc MS |
522 | Topology scheduler support improves the CPU scheduler's decision |
523 | making when dealing with machines that have multi-threading, | |
524 | multiple cores or multiple books. | |
4cb14bc8 | 525 | |
843c48fd JG |
526 | source kernel/Kconfig.preempt |
527 | ||
843c48fd | 528 | source kernel/Kconfig.hz |
1da177e4 | 529 | |
4c637cd8 HF |
530 | config ARCH_RANDOM |
531 | def_bool y | |
532 | prompt "s390 architectural random number generation API" | |
533 | help | |
534 | Enable the s390 architectural random number generation API | |
535 | to provide random data for all consumers within the Linux | |
536 | kernel. | |
537 | ||
538 | When enabled the arch_random_* functions declared in linux/random.h | |
539 | are implemented. The implementation is based on the s390 CPACF | |
540 | instruction subfunction TRNG which provides a real true random | |
541 | number generator. | |
542 | ||
543 | If unsure, say Y. | |
544 | ||
92fa2703 MS |
545 | config KERNEL_NOBP |
546 | def_bool n | |
547 | prompt "Enable modified branch prediction for the kernel by default" | |
548 | help | |
549 | If this option is selected the kernel will switch to a modified | |
550 | branch prediction mode if the firmware interface is available. | |
551 | The modified branch prediction mode improves the behaviour in | |
552 | regard to speculative execution. | |
553 | ||
554 | With the option enabled the kernel parameter "nobp=0" or "nospec" | |
555 | can be used to run the kernel in the normal branch prediction mode. | |
556 | ||
557 | With the option disabled the modified branch prediction mode is | |
558 | enabled with the "nobp=1" kernel parameter. | |
559 | ||
560 | If unsure, say N. | |
561 | ||
00d54225 MS |
562 | config EXPOLINE |
563 | def_bool n | |
564 | prompt "Avoid speculative indirect branches in the kernel" | |
565 | help | |
566 | Compile the kernel with the expoline compiler options to guard | |
567 | against kernel-to-user data leaks by avoiding speculative indirect | |
568 | branches. | |
569 | Requires a compiler with -mindirect-branch=thunk support for full | |
570 | protection. The kernel may run slower. | |
571 | ||
572 | If unsure, say N. | |
573 | ||
574 | choice | |
575 | prompt "Expoline default" | |
576 | depends on EXPOLINE | |
577 | default EXPOLINE_FULL | |
578 | ||
579 | config EXPOLINE_OFF | |
580 | bool "spectre_v2=off" | |
581 | ||
3eb01835 | 582 | config EXPOLINE_AUTO |
00d54225 MS |
583 | bool "spectre_v2=auto" |
584 | ||
585 | config EXPOLINE_FULL | |
586 | bool "spectre_v2=on" | |
587 | ||
588 | endchoice | |
589 | ||
843c48fd | 590 | endmenu |
1da177e4 | 591 | |
843c48fd | 592 | menu "Memory setup" |
1d057720 | 593 | |
843c48fd | 594 | config ARCH_SPARSEMEM_ENABLE |
6f9a3c33 | 595 | def_bool y |
843c48fd JG |
596 | select SPARSEMEM_VMEMMAP_ENABLE |
597 | select SPARSEMEM_VMEMMAP | |
e65e1fc2 | 598 | |
843c48fd JG |
599 | config ARCH_SPARSEMEM_DEFAULT |
600 | def_bool y | |
1da177e4 | 601 | |
843c48fd JG |
602 | config ARCH_SELECT_MEMORY_MODEL |
603 | def_bool y | |
1da177e4 | 604 | |
843c48fd JG |
605 | config ARCH_ENABLE_MEMORY_HOTPLUG |
606 | def_bool y if SPARSEMEM | |
0efa4703 | 607 | |
843c48fd JG |
608 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
609 | def_bool y | |
e37f50e1 | 610 | |
ec66ad66 MS |
611 | config ARCH_ENABLE_SPLIT_PMD_PTLOCK |
612 | def_bool y | |
ec66ad66 | 613 | |
843c48fd JG |
614 | config FORCE_MAX_ZONEORDER |
615 | int | |
616 | default "9" | |
f861e405 | 617 | |
843c48fd | 618 | source "mm/Kconfig" |
1da177e4 | 619 | |
b8402b95 HC |
620 | config MAX_PHYSMEM_BITS |
621 | int "Maximum size of supported physical memory in bits (42-53)" | |
622 | range 42 53 | |
623 | default "46" | |
624 | help | |
625 | This option specifies the maximum supported size of physical memory | |
626 | in bits. Supported is any size between 2^42 (4TB) and 2^53 (8PB). | |
627 | Increasing the number of bits also increases the kernel image size. | |
628 | By default 46 bits (64TB) are supported. | |
629 | ||
1da177e4 | 630 | config PACK_STACK |
6f9a3c33 MS |
631 | def_bool y |
632 | prompt "Pack kernel stack" | |
1da177e4 LT |
633 | help |
634 | This option enables the compiler option -mkernel-backchain if it | |
635 | is available. If the option is available the compiler supports | |
636 | the new stack layout which dramatically reduces the minimum stack | |
637 | frame size. With an old compiler a non-leaf function needs a | |
638 | minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With | |
639 | -mkernel-backchain the minimum size drops to 16 byte on 31 bit | |
640 | and 24 byte on 64 bit. | |
641 | ||
642 | Say Y if you are unsure. | |
643 | ||
1da177e4 | 644 | config CHECK_STACK |
6f9a3c33 MS |
645 | def_bool y |
646 | prompt "Detect kernel stack overflow" | |
1da177e4 LT |
647 | help |
648 | This option enables the compiler option -mstack-guard and | |
649 | -mstack-size if they are available. If the compiler supports them | |
650 | it will emit additional code to each function prolog to trigger | |
651 | an illegal operation if the kernel stack is about to overflow. | |
652 | ||
653 | Say N if you are unsure. | |
654 | ||
655 | config STACK_GUARD | |
656 | int "Size of the guard area (128-1024)" | |
657 | range 128 1024 | |
658 | depends on CHECK_STACK | |
659 | default "256" | |
660 | help | |
661 | This allows you to specify the size of the guard area at the lower | |
662 | end of the kernel stack. If the kernel stack points into the guard | |
663 | area on function entry an illegal operation is triggered. The size | |
664 | needs to be a power of 2. Please keep in mind that the size of an | |
665 | interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit. | |
666 | The minimum size for the stack guard should be 256 for 31 bit and | |
667 | 512 for 64 bit. | |
668 | ||
2c190da4 | 669 | config WARN_DYNAMIC_STACK |
6f9a3c33 | 670 | def_bool n |
2c190da4 | 671 | prompt "Emit compiler warnings for function with dynamic stack usage" |
1da177e4 | 672 | help |
2c190da4 JG |
673 | This option enables the compiler option -mwarn-dynamicstack. If the |
674 | compiler supports this options generates warnings for functions | |
675 | that dynamically allocate stack space using alloca. | |
1da177e4 LT |
676 | |
677 | Say N if you are unsure. | |
678 | ||
843c48fd | 679 | endmenu |
3f22ab27 | 680 | |
843c48fd | 681 | menu "I/O subsystem" |
1da177e4 | 682 | |
1da177e4 | 683 | config QDIO |
6f9a3c33 MS |
684 | def_tristate y |
685 | prompt "QDIO support" | |
1da177e4 | 686 | ---help--- |
8129ee16 | 687 | This driver provides the Queued Direct I/O base support for |
efca13bc | 688 | IBM System z. |
1da177e4 LT |
689 | |
690 | To compile this driver as a module, choose M here: the | |
691 | module will be called qdio. | |
692 | ||
693 | If unsure, say Y. | |
694 | ||
c8717a3d JG |
695 | menuconfig PCI |
696 | bool "PCI support" | |
c8717a3d | 697 | select PCI_MSI |
8128f23c | 698 | select IOMMU_SUPPORT |
c8717a3d JG |
699 | help |
700 | Enable PCI support. | |
701 | ||
702 | if PCI | |
703 | ||
704 | config PCI_NR_FUNCTIONS | |
705 | int "Maximum number of PCI functions (1-4096)" | |
706 | range 1 4096 | |
b18601b0 | 707 | default "128" |
c8717a3d JG |
708 | help |
709 | This allows you to specify the maximum number of PCI functions which | |
710 | this kernel will support. | |
711 | ||
712 | source "drivers/pci/Kconfig" | |
c8717a3d JG |
713 | |
714 | endif # PCI | |
715 | ||
716 | config PCI_DOMAINS | |
717 | def_bool PCI | |
718 | ||
719 | config HAS_IOMEM | |
720 | def_bool PCI | |
721 | ||
722 | config IOMMU_HELPER | |
723 | def_bool PCI | |
724 | ||
c8717a3d JG |
725 | config NEED_SG_DMA_LENGTH |
726 | def_bool PCI | |
727 | ||
91630032 JG |
728 | config NEED_DMA_MAP_STATE |
729 | def_bool PCI | |
730 | ||
9d92a7e1 | 731 | config CHSC_SCH |
d9c11b1e | 732 | def_tristate m |
6f9a3c33 | 733 | prompt "Support for CHSC subchannels" |
9d92a7e1 CH |
734 | help |
735 | This driver allows usage of CHSC subchannels. A CHSC subchannel | |
736 | is usually present on LPAR only. | |
737 | The driver creates a device /dev/chsc, which may be used to | |
738 | obtain I/O configuration information about the machine and | |
739 | to issue asynchronous chsc commands (DANGEROUS). | |
740 | You will usually only want to use this interface on a special | |
741 | LPAR designated for system management. | |
742 | ||
743 | To compile this driver as a module, choose M here: the | |
744 | module will be called chsc_sch. | |
745 | ||
746 | If unsure, say N. | |
747 | ||
1d1c8f78 SO |
748 | config SCM_BUS |
749 | def_bool y | |
1d1c8f78 SO |
750 | prompt "SCM bus driver" |
751 | help | |
752 | Bus driver for Storage Class Memory. | |
753 | ||
eadb86ab SO |
754 | config EADM_SCH |
755 | def_tristate m | |
756 | prompt "Support for EADM subchannels" | |
757 | depends on SCM_BUS | |
758 | help | |
759 | This driver allows usage of EADM subchannels. EADM subchannels act | |
760 | as a communication vehicle for SCM increments. | |
761 | ||
762 | To compile this driver as a module, choose M here: the | |
763 | module will be called eadm_sch. | |
764 | ||
63f1934d DJS |
765 | config VFIO_CCW |
766 | def_tristate n | |
767 | prompt "Support for VFIO-CCW subchannels" | |
84cd8fc4 | 768 | depends on S390_CCW_IOMMU && VFIO_MDEV |
63f1934d DJS |
769 | help |
770 | This driver allows usage of I/O subchannels via VFIO-CCW. | |
771 | ||
772 | To compile this driver as a module, choose M here: the | |
773 | module will be called vfio_ccw. | |
774 | ||
843c48fd JG |
775 | endmenu |
776 | ||
777 | menu "Dump support" | |
778 | ||
779 | config CRASH_DUMP | |
780 | bool "kernel crash dumps" | |
5a79859a | 781 | depends on SMP |
843c48fd JG |
782 | select KEXEC |
783 | help | |
784 | Generate crash dump after being started by kexec. | |
785 | Crash dump kernels are loaded in the main kernel with kexec-tools | |
786 | into a specially reserved region and then later executed after | |
787 | a crash by kdump/kexec. | |
843c48fd | 788 | Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this. |
bf28a597 MH |
789 | This option also enables s390 zfcpdump. |
790 | See also <file:Documentation/s390/zfcpdump.txt> | |
843c48fd JG |
791 | |
792 | endmenu | |
793 | ||
794 | menu "Executable file formats / Emulations" | |
1da177e4 | 795 | |
1da177e4 LT |
796 | source "fs/Kconfig.binfmt" |
797 | ||
843c48fd JG |
798 | config SECCOMP |
799 | def_bool y | |
800 | prompt "Enable seccomp to safely compute untrusted bytecode" | |
801 | depends on PROC_FS | |
802 | help | |
803 | This kernel feature is useful for number crunching applications | |
804 | that may need to compute untrusted bytecode during their | |
805 | execution. By using pipes or other transports made available to | |
806 | the process as file descriptors supporting the read/write | |
807 | syscalls, it's possible to isolate those applications in | |
808 | their own address space using seccomp. Once seccomp is | |
809 | enabled via /proc/<pid>/seccomp, it cannot be disabled | |
810 | and the task is only allowed to execute a few safe syscalls | |
811 | defined by each seccomp mode. | |
812 | ||
813 | If unsure, say Y. | |
814 | ||
815 | endmenu | |
816 | ||
817 | menu "Power Management" | |
818 | ||
819 | config ARCH_HIBERNATION_POSSIBLE | |
5a79859a | 820 | def_bool y |
843c48fd JG |
821 | |
822 | source "kernel/power/Kconfig" | |
823 | ||
824 | endmenu | |
825 | ||
826 | source "net/Kconfig" | |
827 | ||
828 | config PCMCIA | |
829 | def_bool n | |
830 | ||
831 | config CCW | |
832 | def_bool y | |
833 | ||
834 | source "drivers/Kconfig" | |
835 | ||
836 | source "fs/Kconfig" | |
837 | ||
838 | source "arch/s390/Kconfig.debug" | |
839 | ||
840 | source "security/Kconfig" | |
841 | ||
842 | source "crypto/Kconfig" | |
843 | ||
844 | source "lib/Kconfig" | |
845 | ||
846 | menu "Virtualization" | |
684de39b | 847 | |
1da177e4 | 848 | config PFAULT |
6f9a3c33 MS |
849 | def_bool y |
850 | prompt "Pseudo page fault support" | |
1da177e4 LT |
851 | help |
852 | Select this option, if you want to use PFAULT pseudo page fault | |
853 | handling under VM. If running native or in LPAR, this option | |
854 | has no effect. If your VM does not support PFAULT, PAGEEX | |
855 | pseudo page fault handling will be used. | |
856 | Note that VM 4.2 supports PFAULT but has a bug in its | |
857 | implementation that causes some problems. | |
858 | Everybody who wants to run Linux under VM != VM4.2 should select | |
859 | this option. | |
860 | ||
1da177e4 | 861 | config CMM |
6f9a3c33 MS |
862 | def_tristate n |
863 | prompt "Cooperative memory management" | |
1da177e4 LT |
864 | help |
865 | Select this option, if you want to enable the kernel interface | |
866 | to reduce the memory size of the system. This is accomplished | |
867 | by allocating pages of memory and put them "on hold". This only | |
868 | makes sense for a system running under VM where the unused pages | |
869 | will be reused by VM for other guest systems. The interface | |
870 | allows an external monitor to balance memory of many systems. | |
871 | Everybody who wants to run Linux under VM should select this | |
872 | option. | |
873 | ||
1da177e4 | 874 | config CMM_IUCV |
6f9a3c33 MS |
875 | def_bool y |
876 | prompt "IUCV special message interface to cooperative memory management" | |
1da177e4 LT |
877 | depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV) |
878 | help | |
879 | Select this option to enable the special message interface to | |
880 | the cooperative memory management. | |
881 | ||
1da177e4 | 882 | config APPLDATA_BASE |
6f9a3c33 MS |
883 | def_bool n |
884 | prompt "Linux - VM Monitor Stream, base infrastructure" | |
c185b783 | 885 | depends on PROC_FS |
1da177e4 LT |
886 | help |
887 | This provides a kernel interface for creating and updating z/VM APPLDATA | |
888 | monitor records. The monitor records are updated at certain time | |
889 | intervals, once the timer is started. | |
890 | Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer, | |
891 | i.e. enables or disables monitoring on the Linux side. | |
892 | A custom interval value (in seconds) can be written to | |
893 | /proc/appldata/interval. | |
894 | ||
895 | Defaults are 60 seconds interval and timer off. | |
896 | The /proc entries can also be read from, showing the current settings. | |
897 | ||
898 | config APPLDATA_MEM | |
6f9a3c33 MS |
899 | def_tristate m |
900 | prompt "Monitor memory management statistics" | |
62fb2ba3 | 901 | depends on APPLDATA_BASE && VM_EVENT_COUNTERS |
1da177e4 LT |
902 | help |
903 | This provides memory management related data to the Linux - VM Monitor | |
904 | Stream, like paging/swapping rate, memory utilisation, etc. | |
905 | Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM | |
906 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
907 | on the z/VM side. | |
908 | ||
909 | Default is disabled. | |
910 | The /proc entry can also be read from, showing the current settings. | |
911 | ||
912 | This can also be compiled as a module, which will be called | |
913 | appldata_mem.o. | |
914 | ||
915 | config APPLDATA_OS | |
6f9a3c33 MS |
916 | def_tristate m |
917 | prompt "Monitor OS statistics" | |
1da177e4 LT |
918 | depends on APPLDATA_BASE |
919 | help | |
920 | This provides OS related data to the Linux - VM Monitor Stream, like | |
921 | CPU utilisation, etc. | |
922 | Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM | |
923 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
924 | on the z/VM side. | |
925 | ||
926 | Default is disabled. | |
927 | This can also be compiled as a module, which will be called | |
928 | appldata_os.o. | |
929 | ||
930 | config APPLDATA_NET_SUM | |
6f9a3c33 MS |
931 | def_tristate m |
932 | prompt "Monitor overall network statistics" | |
70193af9 | 933 | depends on APPLDATA_BASE && NET |
1da177e4 LT |
934 | help |
935 | This provides network related data to the Linux - VM Monitor Stream, | |
936 | currently there is only a total sum of network I/O statistics, no | |
937 | per-interface data. | |
938 | Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM | |
939 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
940 | on the z/VM side. | |
941 | ||
942 | Default is disabled. | |
943 | This can also be compiled as a module, which will be called | |
944 | appldata_net_sum.o. | |
945 | ||
24bbb1fa | 946 | config S390_HYPFS_FS |
6f9a3c33 MS |
947 | def_bool y |
948 | prompt "s390 hypervisor file system support" | |
24bbb1fa | 949 | select SYS_HYPERVISOR |
24bbb1fa MH |
950 | help |
951 | This is a virtual file system intended to provide accounting | |
952 | information in an s390 hypervisor environment. | |
953 | ||
843c48fd | 954 | source "arch/s390/kvm/Kconfig" |
411ed322 | 955 | |
fa587743 | 956 | config S390_GUEST |
6f9a3c33 | 957 | def_bool y |
510cf5a6 | 958 | prompt "s390 support for virtio devices" |
79b6f7fb | 959 | select TTY |
80629b0b | 960 | select VIRTUALIZATION |
fa587743 | 961 | select VIRTIO |
faeba830 | 962 | select VIRTIO_CONSOLE |
fa587743 | 963 | help |
bdd1fc27 CH |
964 | Enabling this option adds support for virtio based paravirtual device |
965 | drivers on s390. | |
1da177e4 | 966 | |
20766c08 | 967 | Select this option if you want to run the kernel as a guest under |
bdd1fc27 | 968 | the KVM hypervisor. |
155af2f9 HJP |
969 | |
970 | endmenu | |
c7664ddc MS |
971 | |
972 | config KMSG_IDS | |
973 | def_bool y | |
974 | prompt "Kernel message numbers" | |
975 | help | |
976 | Select this option if you want to include a message number to the | |
977 | prefix for kernel messages issued by the s390 architecture and | |
978 | driver code. See "Documentation/s390/kmsg.txt" for more details. |