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Commit | Line | Data |
---|---|---|
1da177e4 | 1 | config MMU |
61d48c2c | 2 | def_bool y |
1da177e4 | 3 | |
66701b14 | 4 | config ZONE_DMA |
69dbb2f7 | 5 | def_bool y |
66701b14 | 6 | |
2fd92273 HC |
7 | config CPU_BIG_ENDIAN |
8 | def_bool y | |
9 | ||
2b105ff9 | 10 | config LOCKDEP_SUPPORT |
61d48c2c | 11 | def_bool y |
2b105ff9 | 12 | |
5bdc9b44 | 13 | config STACKTRACE_SUPPORT |
61d48c2c | 14 | def_bool y |
5bdc9b44 | 15 | |
1da177e4 LT |
16 | config RWSEM_GENERIC_SPINLOCK |
17 | bool | |
18 | ||
19 | config RWSEM_XCHGADD_ALGORITHM | |
61d48c2c | 20 | def_bool y |
1da177e4 | 21 | |
f0d1b0b3 | 22 | config ARCH_HAS_ILOG2_U32 |
6f9a3c33 | 23 | def_bool n |
f0d1b0b3 DH |
24 | |
25 | config ARCH_HAS_ILOG2_U64 | |
6f9a3c33 | 26 | def_bool n |
f0d1b0b3 | 27 | |
7e33db4e | 28 | config GENERIC_HWEIGHT |
61d48c2c | 29 | def_bool y |
7e33db4e | 30 | |
c0007f1a | 31 | config GENERIC_BUG |
6f9a3c33 | 32 | def_bool y if BUG |
c0007f1a | 33 | |
52499f40 HC |
34 | config GENERIC_BUG_RELATIVE_POINTERS |
35 | def_bool y | |
36 | ||
eca577ef | 37 | config ARCH_DMA_ADDR_T_64BIT |
5a79859a | 38 | def_bool y |
eca577ef | 39 | |
b6b40c53 | 40 | config GENERIC_LOCKBREAK |
6f9a3c33 | 41 | def_bool y if SMP && PREEMPT |
b6b40c53 | 42 | |
402b0862 | 43 | config PGSTE |
6f9a3c33 | 44 | def_bool y if KVM |
402b0862 | 45 | |
6a11f75b AM |
46 | config ARCH_SUPPORTS_DEBUG_PAGEALLOC |
47 | def_bool y | |
48 | ||
843c48fd JG |
49 | config KEXEC |
50 | def_bool y | |
2965faa5 | 51 | select KEXEC_CORE |
843c48fd JG |
52 | |
53 | config AUDIT_ARCH | |
54 | def_bool y | |
55 | ||
ce816fa8 | 56 | config NO_IOPORT_MAP |
c8717a3d JG |
57 | def_bool y |
58 | ||
59 | config PCI_QUIRKS | |
60 | def_bool n | |
61 | ||
2a0a5b22 | 62 | config ARCH_SUPPORTS_UPROBES |
5a79859a | 63 | def_bool y |
2a0a5b22 | 64 | |
347a8dc3 | 65 | config S390 |
61d48c2c | 66 | def_bool y |
23fefe11 | 67 | select ARCH_BINFMT_ELF_STATE |
21266be9 | 68 | select ARCH_HAS_DEVMEM_IS_ALLOWED |
2b68f6ca | 69 | select ARCH_HAS_ELF_RANDOMIZE |
957e3fac | 70 | select ARCH_HAS_GCOV_PROFILE_ALL |
e1073d1e | 71 | select ARCH_HAS_GIGANTIC_PAGE if (MEMORY_ISOLATION && COMPACTION) || CMA |
907fa061 | 72 | select ARCH_HAS_KCOV |
d2852a22 | 73 | select ARCH_HAS_SET_MEMORY |
47523c98 | 74 | select ARCH_HAS_SG_CHAIN |
ad21fc4f LA |
75 | select ARCH_HAS_STRICT_KERNEL_RWX |
76 | select ARCH_HAS_STRICT_MODULE_RWX | |
c42d8c7d | 77 | select ARCH_HAS_UBSAN_SANITIZE_ALL |
0e0d04a8 | 78 | select ARCH_HAVE_NMI_SAFE_CMPXCHG |
6beb0009 TG |
79 | select ARCH_INLINE_READ_LOCK |
80 | select ARCH_INLINE_READ_LOCK_BH | |
81 | select ARCH_INLINE_READ_LOCK_IRQ | |
82 | select ARCH_INLINE_READ_LOCK_IRQSAVE | |
0e0d04a8 | 83 | select ARCH_INLINE_READ_TRYLOCK |
6beb0009 TG |
84 | select ARCH_INLINE_READ_UNLOCK |
85 | select ARCH_INLINE_READ_UNLOCK_BH | |
86 | select ARCH_INLINE_READ_UNLOCK_IRQ | |
87 | select ARCH_INLINE_READ_UNLOCK_IRQRESTORE | |
0e0d04a8 HC |
88 | select ARCH_INLINE_SPIN_LOCK |
89 | select ARCH_INLINE_SPIN_LOCK_BH | |
90 | select ARCH_INLINE_SPIN_LOCK_IRQ | |
91 | select ARCH_INLINE_SPIN_LOCK_IRQSAVE | |
92 | select ARCH_INLINE_SPIN_TRYLOCK | |
93 | select ARCH_INLINE_SPIN_TRYLOCK_BH | |
94 | select ARCH_INLINE_SPIN_UNLOCK | |
95 | select ARCH_INLINE_SPIN_UNLOCK_BH | |
96 | select ARCH_INLINE_SPIN_UNLOCK_IRQ | |
97 | select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE | |
6beb0009 TG |
98 | select ARCH_INLINE_WRITE_LOCK |
99 | select ARCH_INLINE_WRITE_LOCK_BH | |
100 | select ARCH_INLINE_WRITE_LOCK_IRQ | |
101 | select ARCH_INLINE_WRITE_LOCK_IRQSAVE | |
0e0d04a8 | 102 | select ARCH_INLINE_WRITE_TRYLOCK |
6beb0009 TG |
103 | select ARCH_INLINE_WRITE_UNLOCK |
104 | select ARCH_INLINE_WRITE_UNLOCK_BH | |
105 | select ARCH_INLINE_WRITE_UNLOCK_IRQ | |
106 | select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE | |
0e0d04a8 | 107 | select ARCH_SAVE_PAGE_KEYS if HIBERNATION |
36e7fdaa | 108 | select ARCH_SUPPORTS_ATOMIC_RMW |
fd15a1f3 | 109 | select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT |
a763bc8b | 110 | select ARCH_SUPPORTS_NUMA_BALANCING |
295d8fa9 | 111 | select ARCH_USE_BUILTIN_BSWAP |
efc1d23b | 112 | select ARCH_USE_CMPXCHG_LOCKREF |
3f6813b9 | 113 | select ARCH_WANTS_DYNAMIC_TASK_STRUCT |
a763bc8b | 114 | select ARCH_WANTS_PROT_NUMA_PROT_NONE |
c42d8c7d | 115 | select ARCH_WANTS_UBSAN_NO_NULL |
c1d7e01d | 116 | select ARCH_WANT_IPC_PARSE_VERSION |
0e0d04a8 HC |
117 | select BUILDTIME_EXTABLE_SORT |
118 | select CLONE_BACKWARDS2 | |
5d6a0163 | 119 | select DYNAMIC_FTRACE if FUNCTION_TRACER |
0e0d04a8 | 120 | select GENERIC_CLOCKEVENTS |
8f00b3e2 | 121 | select GENERIC_CPU_AUTOPROBE |
0e0d04a8 | 122 | select GENERIC_CPU_DEVICES if !SMP |
746479cd | 123 | select GENERIC_FIND_FIRST_BIT |
e80e7813 | 124 | select GENERIC_SMP_IDLE_THREAD |
79c74ecb | 125 | select GENERIC_TIME_VSYSCALL |
0e0d04a8 | 126 | select HAVE_ALIGNED_STRUCT_PAGE if SLUB |
7a017721 | 127 | select HAVE_ARCH_AUDITSYSCALL |
5a79859a | 128 | select HAVE_ARCH_JUMP_LABEL |
fff7fb0b | 129 | select CPU_NO_EFFICIENT_FFS if !HAVE_MARCH_Z9_109_FEATURES |
c63cb468 | 130 | select HAVE_ARCH_SECCOMP_FILTER |
5614dd92 | 131 | select HAVE_ARCH_SOFT_DIRTY |
0e0d04a8 | 132 | select HAVE_ARCH_TRACEHOOK |
5a79859a | 133 | select HAVE_ARCH_TRANSPARENT_HUGEPAGE |
6077776b | 134 | select HAVE_EBPF_JIT if PACK_STACK && HAVE_MARCH_Z196_FEATURES |
0e0d04a8 HC |
135 | select HAVE_CMPXCHG_DOUBLE |
136 | select HAVE_CMPXCHG_LOCAL | |
f50c0e63 | 137 | select HAVE_COPY_THREAD_TLS |
0e0d04a8 | 138 | select HAVE_DEBUG_KMEMLEAK |
e82becfc | 139 | select HAVE_DMA_API_DEBUG |
e1231b0e | 140 | select HAVE_DMA_CONTIGUOUS |
7844572c | 141 | select DMA_NOOP_OPS |
5a79859a HC |
142 | select HAVE_DYNAMIC_FTRACE |
143 | select HAVE_DYNAMIC_FTRACE_WITH_REGS | |
9078a549 | 144 | select HAVE_EFFICIENT_UNALIGNED_ACCESS |
5f56a5df | 145 | select HAVE_EXIT_THREAD |
0e0d04a8 | 146 | select HAVE_FTRACE_MCOUNT_RECORD |
5a79859a HC |
147 | select HAVE_FUNCTION_GRAPH_TRACER |
148 | select HAVE_FUNCTION_TRACER | |
03b8c7b6 | 149 | select HAVE_FUTEX_CMPXCHG if FUTEX |
0e0d04a8 HC |
150 | select HAVE_KERNEL_BZIP2 |
151 | select HAVE_KERNEL_GZIP | |
8e2872ce | 152 | select HAVE_KERNEL_LZ4 |
0e0d04a8 HC |
153 | select HAVE_KERNEL_LZMA |
154 | select HAVE_KERNEL_LZO | |
155 | select HAVE_KERNEL_XZ | |
156 | select HAVE_KPROBES | |
157 | select HAVE_KRETPROBES | |
5a79859a | 158 | select HAVE_KVM |
21042d43 | 159 | select HAVE_LIVEPATCH |
0e0d04a8 HC |
160 | select HAVE_MEMBLOCK |
161 | select HAVE_MEMBLOCK_NODE_MAP | |
50be6345 | 162 | select HAVE_MEMBLOCK_PHYS_MAP |
786d35d4 | 163 | select HAVE_MOD_ARCH_SPECIFIC |
0e0d04a8 HC |
164 | select HAVE_OPROFILE |
165 | select HAVE_PERF_EVENTS | |
166 | select HAVE_REGS_AND_STACK_ACCESS_API | |
167 | select HAVE_SYSCALL_TRACEPOINTS | |
0e0d04a8 | 168 | select HAVE_VIRT_CPU_ACCOUNTING |
786d35d4 | 169 | select MODULES_USE_ELF_RELA |
50be6345 | 170 | select NO_BOOTMEM |
7eddd99c | 171 | select OLD_SIGACTION |
93bead43 | 172 | select OLD_SIGSUSPEND3 |
bb98f396 | 173 | select SPARSE_IRQ |
0e0d04a8 | 174 | select SYSCTL_EXCEPTION_TRACE |
d5c352cd | 175 | select THREAD_INFO_IN_TASK |
0563416b | 176 | select TTY |
0e0d04a8 | 177 | select VIRT_CPU_ACCOUNTING |
40565b5a | 178 | select ARCH_HAS_SCALED_CPUTIME |
93bead43 | 179 | select VIRT_TO_BUS |
42a0bb3f | 180 | select HAVE_NMI |
3a368f74 | 181 | |
1da177e4 | 182 | |
fca3e357 | 183 | config SCHED_OMIT_FRAME_POINTER |
6f9a3c33 | 184 | def_bool y |
fca3e357 | 185 | |
c81956c9 KS |
186 | config PGTABLE_LEVELS |
187 | int | |
1aea9b3f | 188 | default 5 |
c81956c9 | 189 | |
1da177e4 LT |
190 | source "init/Kconfig" |
191 | ||
dc52ddc0 MH |
192 | source "kernel/Kconfig.freezer" |
193 | ||
21042d43 JS |
194 | source "kernel/livepatch/Kconfig" |
195 | ||
843c48fd JG |
196 | menu "Processor type and features" |
197 | ||
198 | config HAVE_MARCH_Z900_FEATURES | |
199 | def_bool n | |
200 | ||
201 | config HAVE_MARCH_Z990_FEATURES | |
202 | def_bool n | |
203 | select HAVE_MARCH_Z900_FEATURES | |
204 | ||
205 | config HAVE_MARCH_Z9_109_FEATURES | |
206 | def_bool n | |
207 | select HAVE_MARCH_Z990_FEATURES | |
208 | ||
209 | config HAVE_MARCH_Z10_FEATURES | |
210 | def_bool n | |
211 | select HAVE_MARCH_Z9_109_FEATURES | |
212 | ||
213 | config HAVE_MARCH_Z196_FEATURES | |
214 | def_bool n | |
215 | select HAVE_MARCH_Z10_FEATURES | |
216 | ||
991c1505 HC |
217 | config HAVE_MARCH_ZEC12_FEATURES |
218 | def_bool n | |
219 | select HAVE_MARCH_Z196_FEATURES | |
220 | ||
f8b2dcbd MS |
221 | config HAVE_MARCH_Z13_FEATURES |
222 | def_bool n | |
223 | select HAVE_MARCH_ZEC12_FEATURES | |
224 | ||
843c48fd JG |
225 | choice |
226 | prompt "Processor type" | |
7072276e | 227 | default MARCH_Z196 |
1da177e4 | 228 | |
843c48fd JG |
229 | config MARCH_Z900 |
230 | bool "IBM zSeries model z800 and z900" | |
5a79859a | 231 | select HAVE_MARCH_Z900_FEATURES |
843c48fd JG |
232 | help |
233 | Select this to enable optimizations for model z800/z900 (2064 and | |
234 | 2066 series). This will enable some optimizations that are not | |
235 | available on older ESA/390 (31 Bit) only CPUs. | |
236 | ||
237 | config MARCH_Z990 | |
238 | bool "IBM zSeries model z890 and z990" | |
5a79859a | 239 | select HAVE_MARCH_Z990_FEATURES |
843c48fd JG |
240 | help |
241 | Select this to enable optimizations for model z890/z990 (2084 and | |
242 | 2086 series). The kernel will be slightly faster but will not work | |
243 | on older machines. | |
244 | ||
245 | config MARCH_Z9_109 | |
246 | bool "IBM System z9" | |
5a79859a | 247 | select HAVE_MARCH_Z9_109_FEATURES |
843c48fd JG |
248 | help |
249 | Select this to enable optimizations for IBM System z9 (2094 and | |
250 | 2096 series). The kernel will be slightly faster but will not work | |
251 | on older machines. | |
252 | ||
253 | config MARCH_Z10 | |
254 | bool "IBM System z10" | |
5a79859a | 255 | select HAVE_MARCH_Z10_FEATURES |
843c48fd JG |
256 | help |
257 | Select this to enable optimizations for IBM System z10 (2097 and | |
258 | 2098 series). The kernel will be slightly faster but will not work | |
259 | on older machines. | |
260 | ||
261 | config MARCH_Z196 | |
262 | bool "IBM zEnterprise 114 and 196" | |
5a79859a | 263 | select HAVE_MARCH_Z196_FEATURES |
843c48fd JG |
264 | help |
265 | Select this to enable optimizations for IBM zEnterprise 114 and 196 | |
266 | (2818 and 2817 series). The kernel will be slightly faster but will | |
267 | not work on older machines. | |
1da177e4 | 268 | |
991c1505 | 269 | config MARCH_ZEC12 |
59471227 | 270 | bool "IBM zBC12 and zEC12" |
5a79859a | 271 | select HAVE_MARCH_ZEC12_FEATURES |
991c1505 | 272 | help |
59471227 HC |
273 | Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and |
274 | 2827 series). The kernel will be slightly faster but will not work on | |
275 | older machines. | |
991c1505 | 276 | |
f8b2dcbd | 277 | config MARCH_Z13 |
bb3aa614 | 278 | bool "IBM z13s and z13" |
5a79859a | 279 | select HAVE_MARCH_Z13_FEATURES |
f8b2dcbd | 280 | help |
bb3aa614 HC |
281 | Select this to enable optimizations for IBM z13s and z13 (2965 and |
282 | 2964 series). The kernel will be slightly faster but will not work on | |
283 | older machines. | |
f8b2dcbd | 284 | |
843c48fd | 285 | endchoice |
1da177e4 | 286 | |
1db9e051 HC |
287 | config MARCH_Z900_TUNE |
288 | def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT | |
289 | ||
290 | config MARCH_Z990_TUNE | |
291 | def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT | |
292 | ||
293 | config MARCH_Z9_109_TUNE | |
294 | def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT | |
295 | ||
296 | config MARCH_Z10_TUNE | |
297 | def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT | |
298 | ||
299 | config MARCH_Z196_TUNE | |
300 | def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT | |
301 | ||
302 | config MARCH_ZEC12_TUNE | |
303 | def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT | |
304 | ||
f8b2dcbd MS |
305 | config MARCH_Z13_TUNE |
306 | def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT | |
307 | ||
1db9e051 HC |
308 | choice |
309 | prompt "Tune code generation" | |
310 | default TUNE_DEFAULT | |
311 | help | |
312 | Cause the compiler to tune (-mtune) the generated code for a machine. | |
313 | This will make the code run faster on the selected machine but | |
314 | somewhat slower on other machines. | |
315 | This option only changes how the compiler emits instructions, not the | |
316 | selection of instructions itself, so the resulting kernel will run on | |
317 | all other machines. | |
318 | ||
319 | config TUNE_DEFAULT | |
320 | bool "Default" | |
321 | help | |
322 | Tune the generated code for the target processor for which the kernel | |
323 | will be compiled. | |
324 | ||
1db9e051 HC |
325 | config TUNE_Z900 |
326 | bool "IBM zSeries model z800 and z900" | |
327 | ||
328 | config TUNE_Z990 | |
329 | bool "IBM zSeries model z890 and z990" | |
330 | ||
331 | config TUNE_Z9_109 | |
332 | bool "IBM System z9" | |
333 | ||
334 | config TUNE_Z10 | |
335 | bool "IBM System z10" | |
336 | ||
337 | config TUNE_Z196 | |
338 | bool "IBM zEnterprise 114 and 196" | |
339 | ||
340 | config TUNE_ZEC12 | |
341 | bool "IBM zBC12 and zEC12" | |
342 | ||
f8b2dcbd MS |
343 | config TUNE_Z13 |
344 | bool "IBM z13" | |
345 | ||
1db9e051 HC |
346 | endchoice |
347 | ||
347a8dc3 | 348 | config 64BIT |
6f9a3c33 | 349 | def_bool y |
d9f7a745 | 350 | |
843c48fd JG |
351 | config COMPAT |
352 | def_bool y | |
353 | prompt "Kernel support for 31 bit emulation" | |
843c48fd JG |
354 | select COMPAT_BINFMT_ELF if BINFMT_ELF |
355 | select ARCH_WANT_OLD_COMPAT_IPC | |
7eddd99c | 356 | select COMPAT_OLD_SIGACTION |
2813893f | 357 | depends on MULTIUSER |
843c48fd JG |
358 | help |
359 | Select this option if you want to enable your system kernel to | |
360 | handle system-calls from ELF binaries for 31 bit ESA. This option | |
361 | (and some other stuff like libraries and such) is needed for | |
362 | executing 31 bit applications. It is safe to say "Y". | |
363 | ||
364 | config SYSVIPC_COMPAT | |
365 | def_bool y if COMPAT && SYSVIPC | |
366 | ||
1da177e4 | 367 | config SMP |
6f9a3c33 MS |
368 | def_bool y |
369 | prompt "Symmetric multi-processing support" | |
1da177e4 LT |
370 | ---help--- |
371 | This enables support for systems with more than one CPU. If you have | |
372 | a system with only one CPU, like most personal computers, say N. If | |
373 | you have a system with more than one CPU, say Y. | |
374 | ||
4a474157 | 375 | If you say N here, the kernel will run on uni- and multiprocessor |
1da177e4 LT |
376 | machines, but will use only one CPU of a multiprocessor machine. If |
377 | you say Y here, the kernel will run on many, but not all, | |
4a474157 | 378 | uniprocessor machines. On a uniprocessor machine, the kernel |
1da177e4 LT |
379 | will run faster if you say N here. |
380 | ||
03502faa AB |
381 | See also the SMP-HOWTO available at |
382 | <http://www.tldp.org/docs.html#howto>. | |
1da177e4 LT |
383 | |
384 | Even if you don't know what to do here, say Y. | |
385 | ||
386 | config NR_CPUS | |
5c75a0da HC |
387 | int "Maximum number of CPUs (2-512)" |
388 | range 2 512 | |
1da177e4 | 389 | depends on SMP |
5a79859a | 390 | default "64" |
1da177e4 LT |
391 | help |
392 | This allows you to specify the maximum number of CPUs which this | |
5c75a0da | 393 | kernel will support. The maximum supported value is 512 and the |
1da177e4 LT |
394 | minimum value which makes sense is 2. |
395 | ||
396 | This is purely to save memory - each supported CPU adds | |
397 | approximately sixteen kilobytes to the kernel image. | |
398 | ||
399 | config HOTPLUG_CPU | |
6f9a3c33 MS |
400 | def_bool y |
401 | prompt "Support for hot-pluggable CPUs" | |
1da177e4 | 402 | depends on SMP |
1da177e4 LT |
403 | help |
404 | Say Y here to be able to turn CPUs off and on. CPUs | |
405 | can be controlled through /sys/devices/system/cpu/cpu#. | |
406 | Say N if you want to disable CPU hotplug. | |
407 | ||
3a368f74 PH |
408 | # Some NUMA nodes have memory ranges that span |
409 | # other nodes. Even though a pfn is valid and | |
410 | # between a node's start and end pfns, it may not | |
411 | # reside on that node. See memmap_init_zone() | |
412 | # for details. <- They meant memory holes! | |
413 | config NODES_SPAN_OTHER_NODES | |
414 | def_bool NUMA | |
415 | ||
416 | config NUMA | |
417 | bool "NUMA support" | |
c095a949 | 418 | depends on SMP && SCHED_TOPOLOGY |
3a368f74 PH |
419 | default n |
420 | help | |
421 | Enable NUMA support | |
422 | ||
423 | This option adds NUMA support to the kernel. | |
424 | ||
425 | An operation mode can be selected by appending | |
426 | numa=<method> to the kernel command line. | |
427 | ||
428 | The default behaviour is identical to appending numa=plain to | |
429 | the command line. This will create just one node with all | |
430 | available memory and all CPUs in it. | |
431 | ||
432 | config NODES_SHIFT | |
433 | int "Maximum NUMA nodes (as a power of 2)" | |
434 | range 1 10 | |
435 | depends on NUMA | |
436 | default "4" | |
437 | help | |
438 | Specify the maximum number of NUMA nodes available on the target | |
439 | system. Increases memory reserved to accommodate various tables. | |
440 | ||
c29a7baf MH |
441 | menu "Select NUMA modes" |
442 | depends on NUMA | |
443 | ||
444 | config NUMA_EMU | |
445 | bool "NUMA emulation" | |
446 | default y | |
447 | help | |
448 | Numa emulation mode will split the available system memory into | |
449 | equal chunks which then are distributed over the configured number | |
450 | of nodes in a round-robin manner. | |
451 | ||
452 | The number of fake nodes is limited by the number of available memory | |
453 | chunks (i.e. memory size / fake size) and the number of supported | |
454 | nodes in the kernel. | |
455 | ||
456 | The CPUs are assigned to the nodes in a way that partially respects | |
457 | the original machine topology (if supported by the machine). | |
458 | Fair distribution of the CPUs is not guaranteed. | |
459 | ||
460 | config EMU_SIZE | |
461 | hex "NUMA emulation memory chunk size" | |
462 | default 0x10000000 | |
463 | range 0x400000 0x100000000 | |
464 | depends on NUMA_EMU | |
465 | help | |
466 | Select the default size by which the memory is chopped and then | |
467 | assigned to emulated NUMA nodes. | |
468 | ||
469 | This can be overridden by specifying | |
470 | ||
471 | emu_size=<n> | |
472 | ||
473 | on the kernel command line where also suffixes K, M, G, and T are | |
474 | supported. | |
475 | ||
476 | endmenu | |
9236b4dd HC |
477 | |
478 | config SCHED_SMT | |
479 | def_bool n | |
c29a7baf | 480 | |
8d11e021 | 481 | config SCHED_MC |
83a24e32 | 482 | def_bool n |
8d11e021 | 483 | |
4cb14bc8 | 484 | config SCHED_BOOK |
10ad34bc MS |
485 | def_bool n |
486 | ||
adac0f1e HC |
487 | config SCHED_DRAWER |
488 | def_bool n | |
489 | ||
10ad34bc | 490 | config SCHED_TOPOLOGY |
6f9a3c33 | 491 | def_bool y |
10ad34bc | 492 | prompt "Topology scheduler support" |
83a24e32 | 493 | depends on SMP |
10ad34bc | 494 | select SCHED_SMT |
83a24e32 | 495 | select SCHED_MC |
10ad34bc | 496 | select SCHED_BOOK |
adac0f1e | 497 | select SCHED_DRAWER |
4cb14bc8 | 498 | help |
10ad34bc MS |
499 | Topology scheduler support improves the CPU scheduler's decision |
500 | making when dealing with machines that have multi-threading, | |
501 | multiple cores or multiple books. | |
4cb14bc8 | 502 | |
843c48fd JG |
503 | source kernel/Kconfig.preempt |
504 | ||
843c48fd | 505 | source kernel/Kconfig.hz |
1da177e4 | 506 | |
4c637cd8 HF |
507 | config ARCH_RANDOM |
508 | def_bool y | |
509 | prompt "s390 architectural random number generation API" | |
510 | help | |
511 | Enable the s390 architectural random number generation API | |
512 | to provide random data for all consumers within the Linux | |
513 | kernel. | |
514 | ||
515 | When enabled the arch_random_* functions declared in linux/random.h | |
516 | are implemented. The implementation is based on the s390 CPACF | |
517 | instruction subfunction TRNG which provides a real true random | |
518 | number generator. | |
519 | ||
520 | If unsure, say Y. | |
521 | ||
9e34b46a MS |
522 | config KERNEL_NOBP |
523 | def_bool n | |
524 | prompt "Enable modified branch prediction for the kernel by default" | |
525 | help | |
526 | If this option is selected the kernel will switch to a modified | |
527 | branch prediction mode if the firmware interface is available. | |
528 | The modified branch prediction mode improves the behaviour in | |
529 | regard to speculative execution. | |
530 | ||
531 | With the option enabled the kernel parameter "nobp=0" or "nospec" | |
532 | can be used to run the kernel in the normal branch prediction mode. | |
533 | ||
534 | With the option disabled the modified branch prediction mode is | |
535 | enabled with the "nobp=1" kernel parameter. | |
536 | ||
537 | If unsure, say N. | |
538 | ||
843c48fd | 539 | endmenu |
1da177e4 | 540 | |
843c48fd | 541 | menu "Memory setup" |
1d057720 | 542 | |
843c48fd | 543 | config ARCH_SPARSEMEM_ENABLE |
6f9a3c33 | 544 | def_bool y |
843c48fd JG |
545 | select SPARSEMEM_VMEMMAP_ENABLE |
546 | select SPARSEMEM_VMEMMAP | |
e65e1fc2 | 547 | |
843c48fd JG |
548 | config ARCH_SPARSEMEM_DEFAULT |
549 | def_bool y | |
1da177e4 | 550 | |
843c48fd JG |
551 | config ARCH_SELECT_MEMORY_MODEL |
552 | def_bool y | |
1da177e4 | 553 | |
843c48fd JG |
554 | config ARCH_ENABLE_MEMORY_HOTPLUG |
555 | def_bool y if SPARSEMEM | |
0efa4703 | 556 | |
843c48fd JG |
557 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
558 | def_bool y | |
e37f50e1 | 559 | |
ec66ad66 MS |
560 | config ARCH_ENABLE_SPLIT_PMD_PTLOCK |
561 | def_bool y | |
ec66ad66 | 562 | |
843c48fd JG |
563 | config FORCE_MAX_ZONEORDER |
564 | int | |
565 | default "9" | |
f861e405 | 566 | |
843c48fd | 567 | source "mm/Kconfig" |
1da177e4 | 568 | |
b8402b95 HC |
569 | config MAX_PHYSMEM_BITS |
570 | int "Maximum size of supported physical memory in bits (42-53)" | |
571 | range 42 53 | |
572 | default "46" | |
573 | help | |
574 | This option specifies the maximum supported size of physical memory | |
575 | in bits. Supported is any size between 2^42 (4TB) and 2^53 (8PB). | |
576 | Increasing the number of bits also increases the kernel image size. | |
577 | By default 46 bits (64TB) are supported. | |
578 | ||
1da177e4 | 579 | config PACK_STACK |
6f9a3c33 MS |
580 | def_bool y |
581 | prompt "Pack kernel stack" | |
1da177e4 LT |
582 | help |
583 | This option enables the compiler option -mkernel-backchain if it | |
584 | is available. If the option is available the compiler supports | |
585 | the new stack layout which dramatically reduces the minimum stack | |
586 | frame size. With an old compiler a non-leaf function needs a | |
587 | minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With | |
588 | -mkernel-backchain the minimum size drops to 16 byte on 31 bit | |
589 | and 24 byte on 64 bit. | |
590 | ||
591 | Say Y if you are unsure. | |
592 | ||
1da177e4 | 593 | config CHECK_STACK |
6f9a3c33 MS |
594 | def_bool y |
595 | prompt "Detect kernel stack overflow" | |
1da177e4 LT |
596 | help |
597 | This option enables the compiler option -mstack-guard and | |
598 | -mstack-size if they are available. If the compiler supports them | |
599 | it will emit additional code to each function prolog to trigger | |
600 | an illegal operation if the kernel stack is about to overflow. | |
601 | ||
602 | Say N if you are unsure. | |
603 | ||
604 | config STACK_GUARD | |
605 | int "Size of the guard area (128-1024)" | |
606 | range 128 1024 | |
607 | depends on CHECK_STACK | |
608 | default "256" | |
609 | help | |
610 | This allows you to specify the size of the guard area at the lower | |
611 | end of the kernel stack. If the kernel stack points into the guard | |
612 | area on function entry an illegal operation is triggered. The size | |
613 | needs to be a power of 2. Please keep in mind that the size of an | |
614 | interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit. | |
615 | The minimum size for the stack guard should be 256 for 31 bit and | |
616 | 512 for 64 bit. | |
617 | ||
2c190da4 | 618 | config WARN_DYNAMIC_STACK |
6f9a3c33 | 619 | def_bool n |
2c190da4 | 620 | prompt "Emit compiler warnings for function with dynamic stack usage" |
1da177e4 | 621 | help |
2c190da4 JG |
622 | This option enables the compiler option -mwarn-dynamicstack. If the |
623 | compiler supports this options generates warnings for functions | |
624 | that dynamically allocate stack space using alloca. | |
1da177e4 LT |
625 | |
626 | Say N if you are unsure. | |
627 | ||
843c48fd | 628 | endmenu |
3f22ab27 | 629 | |
843c48fd | 630 | menu "I/O subsystem" |
1da177e4 | 631 | |
1da177e4 | 632 | config QDIO |
6f9a3c33 MS |
633 | def_tristate y |
634 | prompt "QDIO support" | |
1da177e4 | 635 | ---help--- |
8129ee16 | 636 | This driver provides the Queued Direct I/O base support for |
efca13bc | 637 | IBM System z. |
1da177e4 LT |
638 | |
639 | To compile this driver as a module, choose M here: the | |
640 | module will be called qdio. | |
641 | ||
642 | If unsure, say Y. | |
643 | ||
c8717a3d JG |
644 | menuconfig PCI |
645 | bool "PCI support" | |
c8717a3d | 646 | select PCI_MSI |
8128f23c | 647 | select IOMMU_SUPPORT |
c8717a3d JG |
648 | help |
649 | Enable PCI support. | |
650 | ||
651 | if PCI | |
652 | ||
653 | config PCI_NR_FUNCTIONS | |
654 | int "Maximum number of PCI functions (1-4096)" | |
655 | range 1 4096 | |
b18601b0 | 656 | default "128" |
c8717a3d JG |
657 | help |
658 | This allows you to specify the maximum number of PCI functions which | |
659 | this kernel will support. | |
660 | ||
661 | source "drivers/pci/Kconfig" | |
c8717a3d JG |
662 | |
663 | endif # PCI | |
664 | ||
665 | config PCI_DOMAINS | |
666 | def_bool PCI | |
667 | ||
668 | config HAS_IOMEM | |
669 | def_bool PCI | |
670 | ||
671 | config IOMMU_HELPER | |
672 | def_bool PCI | |
673 | ||
c8717a3d JG |
674 | config NEED_SG_DMA_LENGTH |
675 | def_bool PCI | |
676 | ||
91630032 JG |
677 | config NEED_DMA_MAP_STATE |
678 | def_bool PCI | |
679 | ||
9d92a7e1 | 680 | config CHSC_SCH |
d9c11b1e | 681 | def_tristate m |
6f9a3c33 | 682 | prompt "Support for CHSC subchannels" |
9d92a7e1 CH |
683 | help |
684 | This driver allows usage of CHSC subchannels. A CHSC subchannel | |
685 | is usually present on LPAR only. | |
686 | The driver creates a device /dev/chsc, which may be used to | |
687 | obtain I/O configuration information about the machine and | |
688 | to issue asynchronous chsc commands (DANGEROUS). | |
689 | You will usually only want to use this interface on a special | |
690 | LPAR designated for system management. | |
691 | ||
692 | To compile this driver as a module, choose M here: the | |
693 | module will be called chsc_sch. | |
694 | ||
695 | If unsure, say N. | |
696 | ||
1d1c8f78 SO |
697 | config SCM_BUS |
698 | def_bool y | |
1d1c8f78 SO |
699 | prompt "SCM bus driver" |
700 | help | |
701 | Bus driver for Storage Class Memory. | |
702 | ||
eadb86ab SO |
703 | config EADM_SCH |
704 | def_tristate m | |
705 | prompt "Support for EADM subchannels" | |
706 | depends on SCM_BUS | |
707 | help | |
708 | This driver allows usage of EADM subchannels. EADM subchannels act | |
709 | as a communication vehicle for SCM increments. | |
710 | ||
711 | To compile this driver as a module, choose M here: the | |
712 | module will be called eadm_sch. | |
713 | ||
63f1934d DJS |
714 | config VFIO_CCW |
715 | def_tristate n | |
716 | prompt "Support for VFIO-CCW subchannels" | |
84cd8fc4 | 717 | depends on S390_CCW_IOMMU && VFIO_MDEV |
63f1934d DJS |
718 | help |
719 | This driver allows usage of I/O subchannels via VFIO-CCW. | |
720 | ||
721 | To compile this driver as a module, choose M here: the | |
722 | module will be called vfio_ccw. | |
723 | ||
843c48fd JG |
724 | endmenu |
725 | ||
726 | menu "Dump support" | |
727 | ||
728 | config CRASH_DUMP | |
729 | bool "kernel crash dumps" | |
5a79859a | 730 | depends on SMP |
843c48fd JG |
731 | select KEXEC |
732 | help | |
733 | Generate crash dump after being started by kexec. | |
734 | Crash dump kernels are loaded in the main kernel with kexec-tools | |
735 | into a specially reserved region and then later executed after | |
736 | a crash by kdump/kexec. | |
843c48fd | 737 | Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this. |
bf28a597 MH |
738 | This option also enables s390 zfcpdump. |
739 | See also <file:Documentation/s390/zfcpdump.txt> | |
843c48fd JG |
740 | |
741 | endmenu | |
742 | ||
743 | menu "Executable file formats / Emulations" | |
1da177e4 | 744 | |
1da177e4 LT |
745 | source "fs/Kconfig.binfmt" |
746 | ||
843c48fd JG |
747 | config SECCOMP |
748 | def_bool y | |
749 | prompt "Enable seccomp to safely compute untrusted bytecode" | |
750 | depends on PROC_FS | |
751 | help | |
752 | This kernel feature is useful for number crunching applications | |
753 | that may need to compute untrusted bytecode during their | |
754 | execution. By using pipes or other transports made available to | |
755 | the process as file descriptors supporting the read/write | |
756 | syscalls, it's possible to isolate those applications in | |
757 | their own address space using seccomp. Once seccomp is | |
758 | enabled via /proc/<pid>/seccomp, it cannot be disabled | |
759 | and the task is only allowed to execute a few safe syscalls | |
760 | defined by each seccomp mode. | |
761 | ||
762 | If unsure, say Y. | |
763 | ||
764 | endmenu | |
765 | ||
766 | menu "Power Management" | |
767 | ||
768 | config ARCH_HIBERNATION_POSSIBLE | |
5a79859a | 769 | def_bool y |
843c48fd JG |
770 | |
771 | source "kernel/power/Kconfig" | |
772 | ||
773 | endmenu | |
774 | ||
775 | source "net/Kconfig" | |
776 | ||
777 | config PCMCIA | |
778 | def_bool n | |
779 | ||
780 | config CCW | |
781 | def_bool y | |
782 | ||
783 | source "drivers/Kconfig" | |
784 | ||
785 | source "fs/Kconfig" | |
786 | ||
787 | source "arch/s390/Kconfig.debug" | |
788 | ||
789 | source "security/Kconfig" | |
790 | ||
791 | source "crypto/Kconfig" | |
792 | ||
793 | source "lib/Kconfig" | |
794 | ||
795 | menu "Virtualization" | |
684de39b | 796 | |
1da177e4 | 797 | config PFAULT |
6f9a3c33 MS |
798 | def_bool y |
799 | prompt "Pseudo page fault support" | |
1da177e4 LT |
800 | help |
801 | Select this option, if you want to use PFAULT pseudo page fault | |
802 | handling under VM. If running native or in LPAR, this option | |
803 | has no effect. If your VM does not support PFAULT, PAGEEX | |
804 | pseudo page fault handling will be used. | |
805 | Note that VM 4.2 supports PFAULT but has a bug in its | |
806 | implementation that causes some problems. | |
807 | Everybody who wants to run Linux under VM != VM4.2 should select | |
808 | this option. | |
809 | ||
810 | config SHARED_KERNEL | |
0eccc783 HC |
811 | bool "VM shared kernel support" |
812 | depends on !JUMP_LABEL | |
1da177e4 LT |
813 | help |
814 | Select this option, if you want to share the text segment of the | |
815 | Linux kernel between different VM guests. This reduces memory | |
816 | usage with lots of guests but greatly increases kernel size. | |
9c9c1761 HC |
817 | Also if a kernel was IPL'ed from a shared segment the kexec system |
818 | call will not work. | |
1da177e4 LT |
819 | You should only select this option if you know what you are |
820 | doing and want to exploit this feature. | |
821 | ||
822 | config CMM | |
6f9a3c33 MS |
823 | def_tristate n |
824 | prompt "Cooperative memory management" | |
1da177e4 LT |
825 | help |
826 | Select this option, if you want to enable the kernel interface | |
827 | to reduce the memory size of the system. This is accomplished | |
828 | by allocating pages of memory and put them "on hold". This only | |
829 | makes sense for a system running under VM where the unused pages | |
830 | will be reused by VM for other guest systems. The interface | |
831 | allows an external monitor to balance memory of many systems. | |
832 | Everybody who wants to run Linux under VM should select this | |
833 | option. | |
834 | ||
1da177e4 | 835 | config CMM_IUCV |
6f9a3c33 MS |
836 | def_bool y |
837 | prompt "IUCV special message interface to cooperative memory management" | |
1da177e4 LT |
838 | depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV) |
839 | help | |
840 | Select this option to enable the special message interface to | |
841 | the cooperative memory management. | |
842 | ||
1da177e4 | 843 | config APPLDATA_BASE |
6f9a3c33 MS |
844 | def_bool n |
845 | prompt "Linux - VM Monitor Stream, base infrastructure" | |
c185b783 | 846 | depends on PROC_FS |
1da177e4 LT |
847 | help |
848 | This provides a kernel interface for creating and updating z/VM APPLDATA | |
849 | monitor records. The monitor records are updated at certain time | |
850 | intervals, once the timer is started. | |
851 | Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer, | |
852 | i.e. enables or disables monitoring on the Linux side. | |
853 | A custom interval value (in seconds) can be written to | |
854 | /proc/appldata/interval. | |
855 | ||
856 | Defaults are 60 seconds interval and timer off. | |
857 | The /proc entries can also be read from, showing the current settings. | |
858 | ||
859 | config APPLDATA_MEM | |
6f9a3c33 MS |
860 | def_tristate m |
861 | prompt "Monitor memory management statistics" | |
62fb2ba3 | 862 | depends on APPLDATA_BASE && VM_EVENT_COUNTERS |
1da177e4 LT |
863 | help |
864 | This provides memory management related data to the Linux - VM Monitor | |
865 | Stream, like paging/swapping rate, memory utilisation, etc. | |
866 | Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM | |
867 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
868 | on the z/VM side. | |
869 | ||
870 | Default is disabled. | |
871 | The /proc entry can also be read from, showing the current settings. | |
872 | ||
873 | This can also be compiled as a module, which will be called | |
874 | appldata_mem.o. | |
875 | ||
876 | config APPLDATA_OS | |
6f9a3c33 MS |
877 | def_tristate m |
878 | prompt "Monitor OS statistics" | |
1da177e4 LT |
879 | depends on APPLDATA_BASE |
880 | help | |
881 | This provides OS related data to the Linux - VM Monitor Stream, like | |
882 | CPU utilisation, etc. | |
883 | Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM | |
884 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
885 | on the z/VM side. | |
886 | ||
887 | Default is disabled. | |
888 | This can also be compiled as a module, which will be called | |
889 | appldata_os.o. | |
890 | ||
891 | config APPLDATA_NET_SUM | |
6f9a3c33 MS |
892 | def_tristate m |
893 | prompt "Monitor overall network statistics" | |
70193af9 | 894 | depends on APPLDATA_BASE && NET |
1da177e4 LT |
895 | help |
896 | This provides network related data to the Linux - VM Monitor Stream, | |
897 | currently there is only a total sum of network I/O statistics, no | |
898 | per-interface data. | |
899 | Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM | |
900 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
901 | on the z/VM side. | |
902 | ||
903 | Default is disabled. | |
904 | This can also be compiled as a module, which will be called | |
905 | appldata_net_sum.o. | |
906 | ||
24bbb1fa | 907 | config S390_HYPFS_FS |
6f9a3c33 MS |
908 | def_bool y |
909 | prompt "s390 hypervisor file system support" | |
24bbb1fa | 910 | select SYS_HYPERVISOR |
24bbb1fa MH |
911 | help |
912 | This is a virtual file system intended to provide accounting | |
913 | information in an s390 hypervisor environment. | |
914 | ||
843c48fd | 915 | source "arch/s390/kvm/Kconfig" |
411ed322 | 916 | |
fa587743 | 917 | config S390_GUEST |
6f9a3c33 | 918 | def_bool y |
510cf5a6 | 919 | prompt "s390 support for virtio devices" |
79b6f7fb | 920 | select TTY |
80629b0b | 921 | select VIRTUALIZATION |
fa587743 | 922 | select VIRTIO |
faeba830 | 923 | select VIRTIO_CONSOLE |
fa587743 | 924 | help |
bdd1fc27 CH |
925 | Enabling this option adds support for virtio based paravirtual device |
926 | drivers on s390. | |
1da177e4 | 927 | |
20766c08 | 928 | Select this option if you want to run the kernel as a guest under |
bdd1fc27 | 929 | the KVM hypervisor. |
155af2f9 | 930 | |
3b2fbb3f CH |
931 | config S390_GUEST_OLD_TRANSPORT |
932 | def_bool y | |
933 | prompt "Guest support for old s390 virtio transport (DEPRECATED)" | |
934 | depends on S390_GUEST | |
935 | help | |
936 | Enable this option to add support for the old s390-virtio | |
937 | transport (i.e. virtio devices NOT based on virtio-ccw). This | |
938 | type of virtio devices is only available on the experimental | |
939 | kuli userspace or with old (< 2.6) qemu. If you are running | |
940 | with a modern version of qemu (which supports virtio-ccw since | |
941 | 1.4 and uses it by default since version 2.4), you probably won't | |
942 | need this. | |
943 | ||
155af2f9 | 944 | endmenu |
36b4777f MS |
945 | |
946 | config KMSG_IDS | |
947 | def_bool y | |
948 | prompt "Kernel message numbers" | |
949 | help | |
950 | Select this option if you want to include a message number to the | |
951 | prefix for kernel messages issued by the s390 architecture and | |
952 | driver code. See "Documentation/s390/kmsg.txt" for more details. |