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 AUDIT_ARCH |
51 | def_bool y | |
52 | ||
ce816fa8 | 53 | config NO_IOPORT_MAP |
c8717a3d JG |
54 | def_bool y |
55 | ||
56 | config PCI_QUIRKS | |
57 | def_bool n | |
58 | ||
2a0a5b22 | 59 | config ARCH_SUPPORTS_UPROBES |
5a79859a | 60 | def_bool y |
2a0a5b22 | 61 | |
347a8dc3 | 62 | config S390 |
61d48c2c | 63 | def_bool y |
23fefe11 | 64 | select ARCH_BINFMT_ELF_STATE |
21266be9 | 65 | select ARCH_HAS_DEVMEM_IS_ALLOWED |
2b68f6ca | 66 | select ARCH_HAS_ELF_RANDOMIZE |
79962038 | 67 | select ARCH_HAS_FORTIFY_SOURCE |
957e3fac | 68 | select ARCH_HAS_GCOV_PROFILE_ALL |
e1073d1e | 69 | select ARCH_HAS_GIGANTIC_PAGE if (MEMORY_ISOLATION && COMPACTION) || CMA |
907fa061 | 70 | select ARCH_HAS_KCOV |
d2852a22 | 71 | select ARCH_HAS_SET_MEMORY |
47523c98 | 72 | select ARCH_HAS_SG_CHAIN |
ad21fc4f LA |
73 | select ARCH_HAS_STRICT_KERNEL_RWX |
74 | select ARCH_HAS_STRICT_MODULE_RWX | |
c42d8c7d | 75 | select ARCH_HAS_UBSAN_SANITIZE_ALL |
0e0d04a8 | 76 | select ARCH_HAVE_NMI_SAFE_CMPXCHG |
6beb0009 TG |
77 | select ARCH_INLINE_READ_LOCK |
78 | select ARCH_INLINE_READ_LOCK_BH | |
79 | select ARCH_INLINE_READ_LOCK_IRQ | |
80 | select ARCH_INLINE_READ_LOCK_IRQSAVE | |
0e0d04a8 | 81 | select ARCH_INLINE_READ_TRYLOCK |
6beb0009 TG |
82 | select ARCH_INLINE_READ_UNLOCK |
83 | select ARCH_INLINE_READ_UNLOCK_BH | |
84 | select ARCH_INLINE_READ_UNLOCK_IRQ | |
85 | select ARCH_INLINE_READ_UNLOCK_IRQRESTORE | |
0e0d04a8 HC |
86 | select ARCH_INLINE_SPIN_LOCK |
87 | select ARCH_INLINE_SPIN_LOCK_BH | |
88 | select ARCH_INLINE_SPIN_LOCK_IRQ | |
89 | select ARCH_INLINE_SPIN_LOCK_IRQSAVE | |
90 | select ARCH_INLINE_SPIN_TRYLOCK | |
91 | select ARCH_INLINE_SPIN_TRYLOCK_BH | |
92 | select ARCH_INLINE_SPIN_UNLOCK | |
93 | select ARCH_INLINE_SPIN_UNLOCK_BH | |
94 | select ARCH_INLINE_SPIN_UNLOCK_IRQ | |
95 | select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE | |
6beb0009 TG |
96 | select ARCH_INLINE_WRITE_LOCK |
97 | select ARCH_INLINE_WRITE_LOCK_BH | |
98 | select ARCH_INLINE_WRITE_LOCK_IRQ | |
99 | select ARCH_INLINE_WRITE_LOCK_IRQSAVE | |
0e0d04a8 | 100 | select ARCH_INLINE_WRITE_TRYLOCK |
6beb0009 TG |
101 | select ARCH_INLINE_WRITE_UNLOCK |
102 | select ARCH_INLINE_WRITE_UNLOCK_BH | |
103 | select ARCH_INLINE_WRITE_UNLOCK_IRQ | |
104 | select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE | |
0e0d04a8 | 105 | select ARCH_SAVE_PAGE_KEYS if HIBERNATION |
36e7fdaa | 106 | select ARCH_SUPPORTS_ATOMIC_RMW |
a763bc8b | 107 | select ARCH_SUPPORTS_NUMA_BALANCING |
295d8fa9 | 108 | select ARCH_USE_BUILTIN_BSWAP |
efc1d23b | 109 | select ARCH_USE_CMPXCHG_LOCKREF |
3f6813b9 | 110 | select ARCH_WANTS_DYNAMIC_TASK_STRUCT |
c42d8c7d | 111 | select ARCH_WANTS_UBSAN_NO_NULL |
c1d7e01d | 112 | select ARCH_WANT_IPC_PARSE_VERSION |
0e0d04a8 HC |
113 | select BUILDTIME_EXTABLE_SORT |
114 | select CLONE_BACKWARDS2 | |
5d6a0163 | 115 | select DYNAMIC_FTRACE if FUNCTION_TRACER |
0e0d04a8 | 116 | select GENERIC_CLOCKEVENTS |
8f00b3e2 | 117 | select GENERIC_CPU_AUTOPROBE |
0e0d04a8 | 118 | select GENERIC_CPU_DEVICES if !SMP |
d424986f | 119 | select GENERIC_CPU_VULNERABILITIES |
746479cd | 120 | select GENERIC_FIND_FIRST_BIT |
e80e7813 | 121 | select GENERIC_SMP_IDLE_THREAD |
79c74ecb | 122 | select GENERIC_TIME_VSYSCALL |
0e0d04a8 | 123 | select HAVE_ALIGNED_STRUCT_PAGE if SLUB |
7a017721 | 124 | select HAVE_ARCH_AUDITSYSCALL |
5a79859a | 125 | select HAVE_ARCH_JUMP_LABEL |
fff7fb0b | 126 | select CPU_NO_EFFICIENT_FFS if !HAVE_MARCH_Z9_109_FEATURES |
c63cb468 | 127 | select HAVE_ARCH_SECCOMP_FILTER |
5614dd92 | 128 | select HAVE_ARCH_SOFT_DIRTY |
0e0d04a8 | 129 | select HAVE_ARCH_TRACEHOOK |
5a79859a | 130 | select HAVE_ARCH_TRANSPARENT_HUGEPAGE |
6077776b | 131 | select HAVE_EBPF_JIT if PACK_STACK && HAVE_MARCH_Z196_FEATURES |
0e0d04a8 HC |
132 | select HAVE_CMPXCHG_DOUBLE |
133 | select HAVE_CMPXCHG_LOCAL | |
f50c0e63 | 134 | select HAVE_COPY_THREAD_TLS |
0e0d04a8 | 135 | select HAVE_DEBUG_KMEMLEAK |
e82becfc | 136 | select HAVE_DMA_API_DEBUG |
e1231b0e | 137 | select HAVE_DMA_CONTIGUOUS |
002e6745 | 138 | select DMA_DIRECT_OPS |
5a79859a HC |
139 | select HAVE_DYNAMIC_FTRACE |
140 | select HAVE_DYNAMIC_FTRACE_WITH_REGS | |
9078a549 | 141 | select HAVE_EFFICIENT_UNALIGNED_ACCESS |
0e0d04a8 | 142 | select HAVE_FTRACE_MCOUNT_RECORD |
5a79859a HC |
143 | select HAVE_FUNCTION_GRAPH_TRACER |
144 | select HAVE_FUNCTION_TRACER | |
03b8c7b6 | 145 | select HAVE_FUTEX_CMPXCHG if FUTEX |
dfd4c493 | 146 | select HAVE_GCC_PLUGINS |
0e0d04a8 HC |
147 | select HAVE_KERNEL_BZIP2 |
148 | select HAVE_KERNEL_GZIP | |
8e2872ce | 149 | select HAVE_KERNEL_LZ4 |
0e0d04a8 HC |
150 | select HAVE_KERNEL_LZMA |
151 | select HAVE_KERNEL_LZO | |
152 | select HAVE_KERNEL_XZ | |
153 | select HAVE_KPROBES | |
154 | select HAVE_KRETPROBES | |
5a79859a | 155 | select HAVE_KVM |
21042d43 | 156 | select HAVE_LIVEPATCH |
c33eff60 HC |
157 | select HAVE_PERF_REGS |
158 | select HAVE_PERF_USER_STACK_DUMP | |
0e0d04a8 HC |
159 | select HAVE_MEMBLOCK |
160 | select HAVE_MEMBLOCK_NODE_MAP | |
50be6345 | 161 | select HAVE_MEMBLOCK_PHYS_MAP |
786d35d4 | 162 | select HAVE_MOD_ARCH_SPECIFIC |
0e0d04a8 HC |
163 | select HAVE_OPROFILE |
164 | select HAVE_PERF_EVENTS | |
165 | select HAVE_REGS_AND_STACK_ACCESS_API | |
166 | select HAVE_SYSCALL_TRACEPOINTS | |
0e0d04a8 | 167 | select HAVE_VIRT_CPU_ACCOUNTING |
786d35d4 | 168 | select MODULES_USE_ELF_RELA |
50be6345 | 169 | select NO_BOOTMEM |
7eddd99c | 170 | select OLD_SIGACTION |
93bead43 | 171 | select OLD_SIGSUSPEND3 |
bb98f396 | 172 | select SPARSE_IRQ |
0e0d04a8 | 173 | select SYSCTL_EXCEPTION_TRACE |
d5c352cd | 174 | select THREAD_INFO_IN_TASK |
0563416b | 175 | select TTY |
0e0d04a8 | 176 | select VIRT_CPU_ACCOUNTING |
40565b5a | 177 | select ARCH_HAS_SCALED_CPUTIME |
93bead43 | 178 | select VIRT_TO_BUS |
42a0bb3f | 179 | select HAVE_NMI |
3a368f74 | 180 | |
1da177e4 | 181 | |
fca3e357 | 182 | config SCHED_OMIT_FRAME_POINTER |
6f9a3c33 | 183 | def_bool y |
fca3e357 | 184 | |
c81956c9 KS |
185 | config PGTABLE_LEVELS |
186 | int | |
1aea9b3f | 187 | default 5 |
c81956c9 | 188 | |
1da177e4 LT |
189 | source "init/Kconfig" |
190 | ||
dc52ddc0 MH |
191 | source "kernel/Kconfig.freezer" |
192 | ||
21042d43 JS |
193 | source "kernel/livepatch/Kconfig" |
194 | ||
843c48fd JG |
195 | menu "Processor type and features" |
196 | ||
197 | config HAVE_MARCH_Z900_FEATURES | |
198 | def_bool n | |
199 | ||
200 | config HAVE_MARCH_Z990_FEATURES | |
201 | def_bool n | |
202 | select HAVE_MARCH_Z900_FEATURES | |
203 | ||
204 | config HAVE_MARCH_Z9_109_FEATURES | |
205 | def_bool n | |
206 | select HAVE_MARCH_Z990_FEATURES | |
207 | ||
208 | config HAVE_MARCH_Z10_FEATURES | |
209 | def_bool n | |
210 | select HAVE_MARCH_Z9_109_FEATURES | |
211 | ||
212 | config HAVE_MARCH_Z196_FEATURES | |
213 | def_bool n | |
214 | select HAVE_MARCH_Z10_FEATURES | |
215 | ||
991c1505 HC |
216 | config HAVE_MARCH_ZEC12_FEATURES |
217 | def_bool n | |
218 | select HAVE_MARCH_Z196_FEATURES | |
219 | ||
f8b2dcbd MS |
220 | config HAVE_MARCH_Z13_FEATURES |
221 | def_bool n | |
222 | select HAVE_MARCH_ZEC12_FEATURES | |
223 | ||
6997c323 MS |
224 | config HAVE_MARCH_Z14_FEATURES |
225 | def_bool n | |
226 | select HAVE_MARCH_Z13_FEATURES | |
227 | ||
843c48fd JG |
228 | choice |
229 | prompt "Processor type" | |
7072276e | 230 | default MARCH_Z196 |
1da177e4 | 231 | |
843c48fd JG |
232 | config MARCH_Z900 |
233 | bool "IBM zSeries model z800 and z900" | |
5a79859a | 234 | select HAVE_MARCH_Z900_FEATURES |
843c48fd JG |
235 | help |
236 | Select this to enable optimizations for model z800/z900 (2064 and | |
237 | 2066 series). This will enable some optimizations that are not | |
238 | available on older ESA/390 (31 Bit) only CPUs. | |
239 | ||
240 | config MARCH_Z990 | |
241 | bool "IBM zSeries model z890 and z990" | |
5a79859a | 242 | select HAVE_MARCH_Z990_FEATURES |
843c48fd JG |
243 | help |
244 | Select this to enable optimizations for model z890/z990 (2084 and | |
245 | 2086 series). The kernel will be slightly faster but will not work | |
246 | on older machines. | |
247 | ||
248 | config MARCH_Z9_109 | |
249 | bool "IBM System z9" | |
5a79859a | 250 | select HAVE_MARCH_Z9_109_FEATURES |
843c48fd JG |
251 | help |
252 | Select this to enable optimizations for IBM System z9 (2094 and | |
253 | 2096 series). The kernel will be slightly faster but will not work | |
254 | on older machines. | |
255 | ||
256 | config MARCH_Z10 | |
257 | bool "IBM System z10" | |
5a79859a | 258 | select HAVE_MARCH_Z10_FEATURES |
843c48fd JG |
259 | help |
260 | Select this to enable optimizations for IBM System z10 (2097 and | |
261 | 2098 series). The kernel will be slightly faster but will not work | |
262 | on older machines. | |
263 | ||
264 | config MARCH_Z196 | |
265 | bool "IBM zEnterprise 114 and 196" | |
5a79859a | 266 | select HAVE_MARCH_Z196_FEATURES |
843c48fd JG |
267 | help |
268 | Select this to enable optimizations for IBM zEnterprise 114 and 196 | |
269 | (2818 and 2817 series). The kernel will be slightly faster but will | |
270 | not work on older machines. | |
1da177e4 | 271 | |
991c1505 | 272 | config MARCH_ZEC12 |
59471227 | 273 | bool "IBM zBC12 and zEC12" |
5a79859a | 274 | select HAVE_MARCH_ZEC12_FEATURES |
991c1505 | 275 | help |
59471227 HC |
276 | Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and |
277 | 2827 series). The kernel will be slightly faster but will not work on | |
278 | older machines. | |
991c1505 | 279 | |
f8b2dcbd | 280 | config MARCH_Z13 |
bb3aa614 | 281 | bool "IBM z13s and z13" |
5a79859a | 282 | select HAVE_MARCH_Z13_FEATURES |
f8b2dcbd | 283 | help |
bb3aa614 HC |
284 | Select this to enable optimizations for IBM z13s and z13 (2965 and |
285 | 2964 series). The kernel will be slightly faster but will not work on | |
286 | older machines. | |
f8b2dcbd | 287 | |
6997c323 | 288 | config MARCH_Z14 |
451239eb | 289 | bool "IBM z14 ZR1 and z14" |
6997c323 MS |
290 | select HAVE_MARCH_Z14_FEATURES |
291 | help | |
451239eb HC |
292 | Select this to enable optimizations for IBM z14 ZR1 and z14 (3907 |
293 | and 3906 series). The kernel will be slightly faster but will not | |
294 | work on older machines. | |
6997c323 | 295 | |
843c48fd | 296 | endchoice |
1da177e4 | 297 | |
1db9e051 HC |
298 | config MARCH_Z900_TUNE |
299 | def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT | |
300 | ||
301 | config MARCH_Z990_TUNE | |
302 | def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT | |
303 | ||
304 | config MARCH_Z9_109_TUNE | |
305 | def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT | |
306 | ||
307 | config MARCH_Z10_TUNE | |
308 | def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT | |
309 | ||
310 | config MARCH_Z196_TUNE | |
311 | def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT | |
312 | ||
313 | config MARCH_ZEC12_TUNE | |
314 | def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT | |
315 | ||
f8b2dcbd MS |
316 | config MARCH_Z13_TUNE |
317 | def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT | |
318 | ||
6997c323 MS |
319 | config MARCH_Z14_TUNE |
320 | def_bool TUNE_Z14 || MARCH_Z14 && TUNE_DEFAULT | |
321 | ||
1db9e051 HC |
322 | choice |
323 | prompt "Tune code generation" | |
324 | default TUNE_DEFAULT | |
325 | help | |
326 | Cause the compiler to tune (-mtune) the generated code for a machine. | |
327 | This will make the code run faster on the selected machine but | |
328 | somewhat slower on other machines. | |
329 | This option only changes how the compiler emits instructions, not the | |
330 | selection of instructions itself, so the resulting kernel will run on | |
331 | all other machines. | |
332 | ||
333 | config TUNE_DEFAULT | |
334 | bool "Default" | |
335 | help | |
336 | Tune the generated code for the target processor for which the kernel | |
337 | will be compiled. | |
338 | ||
1db9e051 HC |
339 | config TUNE_Z900 |
340 | bool "IBM zSeries model z800 and z900" | |
341 | ||
342 | config TUNE_Z990 | |
343 | bool "IBM zSeries model z890 and z990" | |
344 | ||
345 | config TUNE_Z9_109 | |
346 | bool "IBM System z9" | |
347 | ||
348 | config TUNE_Z10 | |
349 | bool "IBM System z10" | |
350 | ||
351 | config TUNE_Z196 | |
352 | bool "IBM zEnterprise 114 and 196" | |
353 | ||
354 | config TUNE_ZEC12 | |
355 | bool "IBM zBC12 and zEC12" | |
356 | ||
f8b2dcbd MS |
357 | config TUNE_Z13 |
358 | bool "IBM z13" | |
359 | ||
6997c323 MS |
360 | config TUNE_Z14 |
361 | bool "IBM z14" | |
362 | ||
1db9e051 HC |
363 | endchoice |
364 | ||
347a8dc3 | 365 | config 64BIT |
6f9a3c33 | 366 | def_bool y |
d9f7a745 | 367 | |
843c48fd JG |
368 | config COMPAT |
369 | def_bool y | |
370 | prompt "Kernel support for 31 bit emulation" | |
843c48fd JG |
371 | select COMPAT_BINFMT_ELF if BINFMT_ELF |
372 | select ARCH_WANT_OLD_COMPAT_IPC | |
7eddd99c | 373 | select COMPAT_OLD_SIGACTION |
2813893f | 374 | depends on MULTIUSER |
843c48fd JG |
375 | help |
376 | Select this option if you want to enable your system kernel to | |
377 | handle system-calls from ELF binaries for 31 bit ESA. This option | |
378 | (and some other stuff like libraries and such) is needed for | |
379 | executing 31 bit applications. It is safe to say "Y". | |
380 | ||
381 | config SYSVIPC_COMPAT | |
382 | def_bool y if COMPAT && SYSVIPC | |
383 | ||
1da177e4 | 384 | config SMP |
6f9a3c33 MS |
385 | def_bool y |
386 | prompt "Symmetric multi-processing support" | |
1da177e4 LT |
387 | ---help--- |
388 | This enables support for systems with more than one CPU. If you have | |
389 | a system with only one CPU, like most personal computers, say N. If | |
390 | you have a system with more than one CPU, say Y. | |
391 | ||
4a474157 | 392 | If you say N here, the kernel will run on uni- and multiprocessor |
1da177e4 LT |
393 | machines, but will use only one CPU of a multiprocessor machine. If |
394 | you say Y here, the kernel will run on many, but not all, | |
4a474157 | 395 | uniprocessor machines. On a uniprocessor machine, the kernel |
1da177e4 LT |
396 | will run faster if you say N here. |
397 | ||
03502faa AB |
398 | See also the SMP-HOWTO available at |
399 | <http://www.tldp.org/docs.html#howto>. | |
1da177e4 LT |
400 | |
401 | Even if you don't know what to do here, say Y. | |
402 | ||
403 | config NR_CPUS | |
5c75a0da HC |
404 | int "Maximum number of CPUs (2-512)" |
405 | range 2 512 | |
1da177e4 | 406 | depends on SMP |
5a79859a | 407 | default "64" |
1da177e4 LT |
408 | help |
409 | This allows you to specify the maximum number of CPUs which this | |
5c75a0da | 410 | kernel will support. The maximum supported value is 512 and the |
1da177e4 LT |
411 | minimum value which makes sense is 2. |
412 | ||
413 | This is purely to save memory - each supported CPU adds | |
414 | approximately sixteen kilobytes to the kernel image. | |
415 | ||
416 | config HOTPLUG_CPU | |
6f9a3c33 MS |
417 | def_bool y |
418 | prompt "Support for hot-pluggable CPUs" | |
1da177e4 | 419 | depends on SMP |
1da177e4 LT |
420 | help |
421 | Say Y here to be able to turn CPUs off and on. CPUs | |
422 | can be controlled through /sys/devices/system/cpu/cpu#. | |
423 | Say N if you want to disable CPU hotplug. | |
424 | ||
3a368f74 PH |
425 | # Some NUMA nodes have memory ranges that span |
426 | # other nodes. Even though a pfn is valid and | |
427 | # between a node's start and end pfns, it may not | |
428 | # reside on that node. See memmap_init_zone() | |
429 | # for details. <- They meant memory holes! | |
430 | config NODES_SPAN_OTHER_NODES | |
431 | def_bool NUMA | |
432 | ||
433 | config NUMA | |
434 | bool "NUMA support" | |
c095a949 | 435 | depends on SMP && SCHED_TOPOLOGY |
3a368f74 PH |
436 | default n |
437 | help | |
438 | Enable NUMA support | |
439 | ||
440 | This option adds NUMA support to the kernel. | |
441 | ||
442 | An operation mode can be selected by appending | |
443 | numa=<method> to the kernel command line. | |
444 | ||
445 | The default behaviour is identical to appending numa=plain to | |
446 | the command line. This will create just one node with all | |
447 | available memory and all CPUs in it. | |
448 | ||
449 | config NODES_SHIFT | |
450 | int "Maximum NUMA nodes (as a power of 2)" | |
451 | range 1 10 | |
452 | depends on NUMA | |
453 | default "4" | |
454 | help | |
455 | Specify the maximum number of NUMA nodes available on the target | |
456 | system. Increases memory reserved to accommodate various tables. | |
457 | ||
c29a7baf MH |
458 | menu "Select NUMA modes" |
459 | depends on NUMA | |
460 | ||
461 | config NUMA_EMU | |
462 | bool "NUMA emulation" | |
463 | default y | |
464 | help | |
465 | Numa emulation mode will split the available system memory into | |
466 | equal chunks which then are distributed over the configured number | |
467 | of nodes in a round-robin manner. | |
468 | ||
469 | The number of fake nodes is limited by the number of available memory | |
470 | chunks (i.e. memory size / fake size) and the number of supported | |
471 | nodes in the kernel. | |
472 | ||
473 | The CPUs are assigned to the nodes in a way that partially respects | |
474 | the original machine topology (if supported by the machine). | |
475 | Fair distribution of the CPUs is not guaranteed. | |
476 | ||
477 | config EMU_SIZE | |
478 | hex "NUMA emulation memory chunk size" | |
479 | default 0x10000000 | |
480 | range 0x400000 0x100000000 | |
481 | depends on NUMA_EMU | |
482 | help | |
483 | Select the default size by which the memory is chopped and then | |
484 | assigned to emulated NUMA nodes. | |
485 | ||
486 | This can be overridden by specifying | |
487 | ||
488 | emu_size=<n> | |
489 | ||
490 | on the kernel command line where also suffixes K, M, G, and T are | |
491 | supported. | |
492 | ||
493 | endmenu | |
9236b4dd HC |
494 | |
495 | config SCHED_SMT | |
496 | def_bool n | |
c29a7baf | 497 | |
8d11e021 | 498 | config SCHED_MC |
83a24e32 | 499 | def_bool n |
8d11e021 | 500 | |
4cb14bc8 | 501 | config SCHED_BOOK |
10ad34bc MS |
502 | def_bool n |
503 | ||
adac0f1e HC |
504 | config SCHED_DRAWER |
505 | def_bool n | |
506 | ||
10ad34bc | 507 | config SCHED_TOPOLOGY |
6f9a3c33 | 508 | def_bool y |
10ad34bc | 509 | prompt "Topology scheduler support" |
83a24e32 | 510 | depends on SMP |
10ad34bc | 511 | select SCHED_SMT |
83a24e32 | 512 | select SCHED_MC |
10ad34bc | 513 | select SCHED_BOOK |
adac0f1e | 514 | select SCHED_DRAWER |
4cb14bc8 | 515 | help |
10ad34bc MS |
516 | Topology scheduler support improves the CPU scheduler's decision |
517 | making when dealing with machines that have multi-threading, | |
518 | multiple cores or multiple books. | |
4cb14bc8 | 519 | |
843c48fd JG |
520 | source kernel/Kconfig.preempt |
521 | ||
843c48fd | 522 | source kernel/Kconfig.hz |
1da177e4 | 523 | |
bdea9f6f PR |
524 | config KEXEC |
525 | def_bool y | |
526 | select KEXEC_CORE | |
527 | ||
528 | config KEXEC_FILE | |
529 | bool "kexec file based system call" | |
530 | select KEXEC_CORE | |
531 | select BUILD_BIN2C | |
532 | depends on CRYPTO | |
533 | depends on CRYPTO_SHA256 | |
534 | depends on CRYPTO_SHA256_S390 | |
535 | help | |
536 | Enable the kexec file based system call. In contrast to the normal | |
537 | kexec system call this system call takes file descriptors for the | |
538 | kernel and initramfs as arguments. | |
539 | ||
540 | config ARCH_HAS_KEXEC_PURGATORY | |
541 | def_bool y | |
542 | depends on KEXEC_FILE | |
543 | ||
4c637cd8 HF |
544 | config ARCH_RANDOM |
545 | def_bool y | |
546 | prompt "s390 architectural random number generation API" | |
547 | help | |
548 | Enable the s390 architectural random number generation API | |
549 | to provide random data for all consumers within the Linux | |
550 | kernel. | |
551 | ||
552 | When enabled the arch_random_* functions declared in linux/random.h | |
553 | are implemented. The implementation is based on the s390 CPACF | |
554 | instruction subfunction TRNG which provides a real true random | |
555 | number generator. | |
556 | ||
557 | If unsure, say Y. | |
558 | ||
d768bd89 MS |
559 | config KERNEL_NOBP |
560 | def_bool n | |
561 | prompt "Enable modified branch prediction for the kernel by default" | |
562 | help | |
563 | If this option is selected the kernel will switch to a modified | |
564 | branch prediction mode if the firmware interface is available. | |
565 | The modified branch prediction mode improves the behaviour in | |
566 | regard to speculative execution. | |
567 | ||
568 | With the option enabled the kernel parameter "nobp=0" or "nospec" | |
569 | can be used to run the kernel in the normal branch prediction mode. | |
570 | ||
571 | With the option disabled the modified branch prediction mode is | |
572 | enabled with the "nobp=1" kernel parameter. | |
573 | ||
574 | If unsure, say N. | |
575 | ||
f19fbd5e MS |
576 | config EXPOLINE |
577 | def_bool n | |
578 | prompt "Avoid speculative indirect branches in the kernel" | |
579 | help | |
580 | Compile the kernel with the expoline compiler options to guard | |
581 | against kernel-to-user data leaks by avoiding speculative indirect | |
582 | branches. | |
583 | Requires a compiler with -mindirect-branch=thunk support for full | |
584 | protection. The kernel may run slower. | |
585 | ||
586 | If unsure, say N. | |
587 | ||
588 | choice | |
589 | prompt "Expoline default" | |
590 | depends on EXPOLINE | |
591 | default EXPOLINE_FULL | |
592 | ||
593 | config EXPOLINE_OFF | |
594 | bool "spectre_v2=off" | |
595 | ||
6e179d64 | 596 | config EXPOLINE_AUTO |
f19fbd5e MS |
597 | bool "spectre_v2=auto" |
598 | ||
599 | config EXPOLINE_FULL | |
600 | bool "spectre_v2=on" | |
601 | ||
602 | endchoice | |
603 | ||
843c48fd | 604 | endmenu |
1da177e4 | 605 | |
843c48fd | 606 | menu "Memory setup" |
1d057720 | 607 | |
843c48fd | 608 | config ARCH_SPARSEMEM_ENABLE |
6f9a3c33 | 609 | def_bool y |
843c48fd JG |
610 | select SPARSEMEM_VMEMMAP_ENABLE |
611 | select SPARSEMEM_VMEMMAP | |
e65e1fc2 | 612 | |
843c48fd JG |
613 | config ARCH_SPARSEMEM_DEFAULT |
614 | def_bool y | |
1da177e4 | 615 | |
843c48fd JG |
616 | config ARCH_SELECT_MEMORY_MODEL |
617 | def_bool y | |
1da177e4 | 618 | |
843c48fd JG |
619 | config ARCH_ENABLE_MEMORY_HOTPLUG |
620 | def_bool y if SPARSEMEM | |
0efa4703 | 621 | |
843c48fd JG |
622 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
623 | def_bool y | |
e37f50e1 | 624 | |
ec66ad66 MS |
625 | config ARCH_ENABLE_SPLIT_PMD_PTLOCK |
626 | def_bool y | |
ec66ad66 | 627 | |
843c48fd JG |
628 | config FORCE_MAX_ZONEORDER |
629 | int | |
630 | default "9" | |
f861e405 | 631 | |
843c48fd | 632 | source "mm/Kconfig" |
1da177e4 | 633 | |
b8402b95 HC |
634 | config MAX_PHYSMEM_BITS |
635 | int "Maximum size of supported physical memory in bits (42-53)" | |
636 | range 42 53 | |
637 | default "46" | |
638 | help | |
639 | This option specifies the maximum supported size of physical memory | |
640 | in bits. Supported is any size between 2^42 (4TB) and 2^53 (8PB). | |
641 | Increasing the number of bits also increases the kernel image size. | |
642 | By default 46 bits (64TB) are supported. | |
643 | ||
1da177e4 | 644 | config PACK_STACK |
6f9a3c33 MS |
645 | def_bool y |
646 | prompt "Pack kernel stack" | |
1da177e4 LT |
647 | help |
648 | This option enables the compiler option -mkernel-backchain if it | |
649 | is available. If the option is available the compiler supports | |
650 | the new stack layout which dramatically reduces the minimum stack | |
651 | frame size. With an old compiler a non-leaf function needs a | |
652 | minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With | |
653 | -mkernel-backchain the minimum size drops to 16 byte on 31 bit | |
654 | and 24 byte on 64 bit. | |
655 | ||
656 | Say Y if you are unsure. | |
657 | ||
1da177e4 | 658 | config CHECK_STACK |
6f9a3c33 MS |
659 | def_bool y |
660 | prompt "Detect kernel stack overflow" | |
1da177e4 LT |
661 | help |
662 | This option enables the compiler option -mstack-guard and | |
663 | -mstack-size if they are available. If the compiler supports them | |
664 | it will emit additional code to each function prolog to trigger | |
665 | an illegal operation if the kernel stack is about to overflow. | |
666 | ||
667 | Say N if you are unsure. | |
668 | ||
669 | config STACK_GUARD | |
670 | int "Size of the guard area (128-1024)" | |
671 | range 128 1024 | |
672 | depends on CHECK_STACK | |
673 | default "256" | |
674 | help | |
675 | This allows you to specify the size of the guard area at the lower | |
676 | end of the kernel stack. If the kernel stack points into the guard | |
677 | area on function entry an illegal operation is triggered. The size | |
678 | needs to be a power of 2. Please keep in mind that the size of an | |
679 | interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit. | |
680 | The minimum size for the stack guard should be 256 for 31 bit and | |
681 | 512 for 64 bit. | |
682 | ||
2c190da4 | 683 | config WARN_DYNAMIC_STACK |
6f9a3c33 | 684 | def_bool n |
2c190da4 | 685 | prompt "Emit compiler warnings for function with dynamic stack usage" |
1da177e4 | 686 | help |
2c190da4 JG |
687 | This option enables the compiler option -mwarn-dynamicstack. If the |
688 | compiler supports this options generates warnings for functions | |
689 | that dynamically allocate stack space using alloca. | |
1da177e4 LT |
690 | |
691 | Say N if you are unsure. | |
692 | ||
843c48fd | 693 | endmenu |
3f22ab27 | 694 | |
843c48fd | 695 | menu "I/O subsystem" |
1da177e4 | 696 | |
1da177e4 | 697 | config QDIO |
6f9a3c33 MS |
698 | def_tristate y |
699 | prompt "QDIO support" | |
1da177e4 | 700 | ---help--- |
8129ee16 | 701 | This driver provides the Queued Direct I/O base support for |
efca13bc | 702 | IBM System z. |
1da177e4 LT |
703 | |
704 | To compile this driver as a module, choose M here: the | |
705 | module will be called qdio. | |
706 | ||
707 | If unsure, say Y. | |
708 | ||
c8717a3d JG |
709 | menuconfig PCI |
710 | bool "PCI support" | |
c8717a3d | 711 | select PCI_MSI |
8128f23c | 712 | select IOMMU_SUPPORT |
c8717a3d JG |
713 | help |
714 | Enable PCI support. | |
715 | ||
716 | if PCI | |
717 | ||
718 | config PCI_NR_FUNCTIONS | |
719 | int "Maximum number of PCI functions (1-4096)" | |
720 | range 1 4096 | |
b18601b0 | 721 | default "128" |
c8717a3d JG |
722 | help |
723 | This allows you to specify the maximum number of PCI functions which | |
724 | this kernel will support. | |
725 | ||
726 | source "drivers/pci/Kconfig" | |
c8717a3d JG |
727 | |
728 | endif # PCI | |
729 | ||
730 | config PCI_DOMAINS | |
731 | def_bool PCI | |
732 | ||
733 | config HAS_IOMEM | |
734 | def_bool PCI | |
735 | ||
736 | config IOMMU_HELPER | |
737 | def_bool PCI | |
738 | ||
c8717a3d JG |
739 | config NEED_SG_DMA_LENGTH |
740 | def_bool PCI | |
741 | ||
91630032 JG |
742 | config NEED_DMA_MAP_STATE |
743 | def_bool PCI | |
744 | ||
9d92a7e1 | 745 | config CHSC_SCH |
d9c11b1e | 746 | def_tristate m |
6f9a3c33 | 747 | prompt "Support for CHSC subchannels" |
9d92a7e1 CH |
748 | help |
749 | This driver allows usage of CHSC subchannels. A CHSC subchannel | |
750 | is usually present on LPAR only. | |
751 | The driver creates a device /dev/chsc, which may be used to | |
752 | obtain I/O configuration information about the machine and | |
753 | to issue asynchronous chsc commands (DANGEROUS). | |
754 | You will usually only want to use this interface on a special | |
755 | LPAR designated for system management. | |
756 | ||
757 | To compile this driver as a module, choose M here: the | |
758 | module will be called chsc_sch. | |
759 | ||
760 | If unsure, say N. | |
761 | ||
1d1c8f78 SO |
762 | config SCM_BUS |
763 | def_bool y | |
1d1c8f78 SO |
764 | prompt "SCM bus driver" |
765 | help | |
766 | Bus driver for Storage Class Memory. | |
767 | ||
eadb86ab SO |
768 | config EADM_SCH |
769 | def_tristate m | |
770 | prompt "Support for EADM subchannels" | |
771 | depends on SCM_BUS | |
772 | help | |
773 | This driver allows usage of EADM subchannels. EADM subchannels act | |
774 | as a communication vehicle for SCM increments. | |
775 | ||
776 | To compile this driver as a module, choose M here: the | |
777 | module will be called eadm_sch. | |
778 | ||
63f1934d DJS |
779 | config VFIO_CCW |
780 | def_tristate n | |
781 | prompt "Support for VFIO-CCW subchannels" | |
84cd8fc4 | 782 | depends on S390_CCW_IOMMU && VFIO_MDEV |
63f1934d DJS |
783 | help |
784 | This driver allows usage of I/O subchannels via VFIO-CCW. | |
785 | ||
786 | To compile this driver as a module, choose M here: the | |
787 | module will be called vfio_ccw. | |
788 | ||
843c48fd JG |
789 | endmenu |
790 | ||
791 | menu "Dump support" | |
792 | ||
793 | config CRASH_DUMP | |
794 | bool "kernel crash dumps" | |
5a79859a | 795 | depends on SMP |
843c48fd JG |
796 | select KEXEC |
797 | help | |
798 | Generate crash dump after being started by kexec. | |
799 | Crash dump kernels are loaded in the main kernel with kexec-tools | |
800 | into a specially reserved region and then later executed after | |
801 | a crash by kdump/kexec. | |
843c48fd | 802 | Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this. |
bf28a597 MH |
803 | This option also enables s390 zfcpdump. |
804 | See also <file:Documentation/s390/zfcpdump.txt> | |
843c48fd JG |
805 | |
806 | endmenu | |
807 | ||
808 | menu "Executable file formats / Emulations" | |
1da177e4 | 809 | |
1da177e4 LT |
810 | source "fs/Kconfig.binfmt" |
811 | ||
843c48fd JG |
812 | config SECCOMP |
813 | def_bool y | |
814 | prompt "Enable seccomp to safely compute untrusted bytecode" | |
815 | depends on PROC_FS | |
816 | help | |
817 | This kernel feature is useful for number crunching applications | |
818 | that may need to compute untrusted bytecode during their | |
819 | execution. By using pipes or other transports made available to | |
820 | the process as file descriptors supporting the read/write | |
821 | syscalls, it's possible to isolate those applications in | |
822 | their own address space using seccomp. Once seccomp is | |
823 | enabled via /proc/<pid>/seccomp, it cannot be disabled | |
824 | and the task is only allowed to execute a few safe syscalls | |
825 | defined by each seccomp mode. | |
826 | ||
827 | If unsure, say Y. | |
828 | ||
829 | endmenu | |
830 | ||
831 | menu "Power Management" | |
832 | ||
833 | config ARCH_HIBERNATION_POSSIBLE | |
5a79859a | 834 | def_bool y |
843c48fd JG |
835 | |
836 | source "kernel/power/Kconfig" | |
837 | ||
838 | endmenu | |
839 | ||
840 | source "net/Kconfig" | |
841 | ||
842 | config PCMCIA | |
843 | def_bool n | |
844 | ||
845 | config CCW | |
846 | def_bool y | |
847 | ||
848 | source "drivers/Kconfig" | |
849 | ||
850 | source "fs/Kconfig" | |
851 | ||
852 | source "arch/s390/Kconfig.debug" | |
853 | ||
854 | source "security/Kconfig" | |
855 | ||
856 | source "crypto/Kconfig" | |
857 | ||
858 | source "lib/Kconfig" | |
859 | ||
860 | menu "Virtualization" | |
684de39b | 861 | |
1da177e4 | 862 | config PFAULT |
6f9a3c33 MS |
863 | def_bool y |
864 | prompt "Pseudo page fault support" | |
1da177e4 LT |
865 | help |
866 | Select this option, if you want to use PFAULT pseudo page fault | |
867 | handling under VM. If running native or in LPAR, this option | |
868 | has no effect. If your VM does not support PFAULT, PAGEEX | |
869 | pseudo page fault handling will be used. | |
870 | Note that VM 4.2 supports PFAULT but has a bug in its | |
871 | implementation that causes some problems. | |
872 | Everybody who wants to run Linux under VM != VM4.2 should select | |
873 | this option. | |
874 | ||
1da177e4 | 875 | config CMM |
6f9a3c33 MS |
876 | def_tristate n |
877 | prompt "Cooperative memory management" | |
1da177e4 LT |
878 | help |
879 | Select this option, if you want to enable the kernel interface | |
880 | to reduce the memory size of the system. This is accomplished | |
881 | by allocating pages of memory and put them "on hold". This only | |
882 | makes sense for a system running under VM where the unused pages | |
883 | will be reused by VM for other guest systems. The interface | |
884 | allows an external monitor to balance memory of many systems. | |
885 | Everybody who wants to run Linux under VM should select this | |
886 | option. | |
887 | ||
1da177e4 | 888 | config CMM_IUCV |
6f9a3c33 MS |
889 | def_bool y |
890 | prompt "IUCV special message interface to cooperative memory management" | |
1da177e4 LT |
891 | depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV) |
892 | help | |
893 | Select this option to enable the special message interface to | |
894 | the cooperative memory management. | |
895 | ||
1da177e4 | 896 | config APPLDATA_BASE |
6f9a3c33 MS |
897 | def_bool n |
898 | prompt "Linux - VM Monitor Stream, base infrastructure" | |
c185b783 | 899 | depends on PROC_FS |
1da177e4 LT |
900 | help |
901 | This provides a kernel interface for creating and updating z/VM APPLDATA | |
902 | monitor records. The monitor records are updated at certain time | |
903 | intervals, once the timer is started. | |
904 | Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer, | |
905 | i.e. enables or disables monitoring on the Linux side. | |
906 | A custom interval value (in seconds) can be written to | |
907 | /proc/appldata/interval. | |
908 | ||
909 | Defaults are 60 seconds interval and timer off. | |
910 | The /proc entries can also be read from, showing the current settings. | |
911 | ||
912 | config APPLDATA_MEM | |
6f9a3c33 MS |
913 | def_tristate m |
914 | prompt "Monitor memory management statistics" | |
62fb2ba3 | 915 | depends on APPLDATA_BASE && VM_EVENT_COUNTERS |
1da177e4 LT |
916 | help |
917 | This provides memory management related data to the Linux - VM Monitor | |
918 | Stream, like paging/swapping rate, memory utilisation, etc. | |
919 | Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM | |
920 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
921 | on the z/VM side. | |
922 | ||
923 | Default is disabled. | |
924 | The /proc entry can also be read from, showing the current settings. | |
925 | ||
926 | This can also be compiled as a module, which will be called | |
927 | appldata_mem.o. | |
928 | ||
929 | config APPLDATA_OS | |
6f9a3c33 MS |
930 | def_tristate m |
931 | prompt "Monitor OS statistics" | |
1da177e4 LT |
932 | depends on APPLDATA_BASE |
933 | help | |
934 | This provides OS related data to the Linux - VM Monitor Stream, like | |
935 | CPU utilisation, etc. | |
936 | Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM | |
937 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
938 | on the z/VM side. | |
939 | ||
940 | Default is disabled. | |
941 | This can also be compiled as a module, which will be called | |
942 | appldata_os.o. | |
943 | ||
944 | config APPLDATA_NET_SUM | |
6f9a3c33 MS |
945 | def_tristate m |
946 | prompt "Monitor overall network statistics" | |
70193af9 | 947 | depends on APPLDATA_BASE && NET |
1da177e4 LT |
948 | help |
949 | This provides network related data to the Linux - VM Monitor Stream, | |
950 | currently there is only a total sum of network I/O statistics, no | |
951 | per-interface data. | |
952 | Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM | |
953 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
954 | on the z/VM side. | |
955 | ||
956 | Default is disabled. | |
957 | This can also be compiled as a module, which will be called | |
958 | appldata_net_sum.o. | |
959 | ||
24bbb1fa | 960 | config S390_HYPFS_FS |
6f9a3c33 MS |
961 | def_bool y |
962 | prompt "s390 hypervisor file system support" | |
24bbb1fa | 963 | select SYS_HYPERVISOR |
24bbb1fa MH |
964 | help |
965 | This is a virtual file system intended to provide accounting | |
966 | information in an s390 hypervisor environment. | |
967 | ||
843c48fd | 968 | source "arch/s390/kvm/Kconfig" |
411ed322 | 969 | |
fa587743 | 970 | config S390_GUEST |
6f9a3c33 | 971 | def_bool y |
510cf5a6 | 972 | prompt "s390 support for virtio devices" |
79b6f7fb | 973 | select TTY |
80629b0b | 974 | select VIRTUALIZATION |
fa587743 | 975 | select VIRTIO |
faeba830 | 976 | select VIRTIO_CONSOLE |
fa587743 | 977 | help |
bdd1fc27 CH |
978 | Enabling this option adds support for virtio based paravirtual device |
979 | drivers on s390. | |
1da177e4 | 980 | |
20766c08 | 981 | Select this option if you want to run the kernel as a guest under |
bdd1fc27 | 982 | the KVM hypervisor. |
155af2f9 HJP |
983 | |
984 | endmenu |