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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 |
21266be9 | 67 | select ARCH_HAS_DEVMEM_IS_ALLOWED |
2b68f6ca | 68 | select ARCH_HAS_ELF_RANDOMIZE |
957e3fac | 69 | select ARCH_HAS_GCOV_PROFILE_ALL |
461a7184 | 70 | select ARCH_HAS_GIGANTIC_PAGE |
907fa061 | 71 | select ARCH_HAS_KCOV |
d2852a22 | 72 | select ARCH_HAS_SET_MEMORY |
47523c98 | 73 | select ARCH_HAS_SG_CHAIN |
ad21fc4f LA |
74 | select ARCH_HAS_STRICT_KERNEL_RWX |
75 | select ARCH_HAS_STRICT_MODULE_RWX | |
c42d8c7d | 76 | select ARCH_HAS_UBSAN_SANITIZE_ALL |
0e0d04a8 | 77 | select ARCH_HAVE_NMI_SAFE_CMPXCHG |
6beb0009 TG |
78 | select ARCH_INLINE_READ_LOCK |
79 | select ARCH_INLINE_READ_LOCK_BH | |
80 | select ARCH_INLINE_READ_LOCK_IRQ | |
81 | select ARCH_INLINE_READ_LOCK_IRQSAVE | |
0e0d04a8 | 82 | select ARCH_INLINE_READ_TRYLOCK |
6beb0009 TG |
83 | select ARCH_INLINE_READ_UNLOCK |
84 | select ARCH_INLINE_READ_UNLOCK_BH | |
85 | select ARCH_INLINE_READ_UNLOCK_IRQ | |
86 | select ARCH_INLINE_READ_UNLOCK_IRQRESTORE | |
0e0d04a8 HC |
87 | select ARCH_INLINE_SPIN_LOCK |
88 | select ARCH_INLINE_SPIN_LOCK_BH | |
89 | select ARCH_INLINE_SPIN_LOCK_IRQ | |
90 | select ARCH_INLINE_SPIN_LOCK_IRQSAVE | |
91 | select ARCH_INLINE_SPIN_TRYLOCK | |
92 | select ARCH_INLINE_SPIN_TRYLOCK_BH | |
93 | select ARCH_INLINE_SPIN_UNLOCK | |
94 | select ARCH_INLINE_SPIN_UNLOCK_BH | |
95 | select ARCH_INLINE_SPIN_UNLOCK_IRQ | |
96 | select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE | |
6beb0009 TG |
97 | select ARCH_INLINE_WRITE_LOCK |
98 | select ARCH_INLINE_WRITE_LOCK_BH | |
99 | select ARCH_INLINE_WRITE_LOCK_IRQ | |
100 | select ARCH_INLINE_WRITE_LOCK_IRQSAVE | |
0e0d04a8 | 101 | select ARCH_INLINE_WRITE_TRYLOCK |
6beb0009 TG |
102 | select ARCH_INLINE_WRITE_UNLOCK |
103 | select ARCH_INLINE_WRITE_UNLOCK_BH | |
104 | select ARCH_INLINE_WRITE_UNLOCK_IRQ | |
105 | select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE | |
0e0d04a8 | 106 | select ARCH_SAVE_PAGE_KEYS if HIBERNATION |
36e7fdaa | 107 | select ARCH_SUPPORTS_ATOMIC_RMW |
a763bc8b | 108 | select ARCH_SUPPORTS_NUMA_BALANCING |
295d8fa9 | 109 | select ARCH_USE_BUILTIN_BSWAP |
efc1d23b | 110 | select ARCH_USE_CMPXCHG_LOCKREF |
3f6813b9 | 111 | select ARCH_WANTS_DYNAMIC_TASK_STRUCT |
a763bc8b | 112 | select ARCH_WANTS_PROT_NUMA_PROT_NONE |
c42d8c7d | 113 | select ARCH_WANTS_UBSAN_NO_NULL |
c1d7e01d | 114 | select ARCH_WANT_IPC_PARSE_VERSION |
0e0d04a8 HC |
115 | select BUILDTIME_EXTABLE_SORT |
116 | select CLONE_BACKWARDS2 | |
5d6a0163 | 117 | select DYNAMIC_FTRACE if FUNCTION_TRACER |
0e0d04a8 | 118 | select GENERIC_CLOCKEVENTS |
8f00b3e2 | 119 | select GENERIC_CPU_AUTOPROBE |
0e0d04a8 | 120 | select GENERIC_CPU_DEVICES if !SMP |
746479cd | 121 | select GENERIC_FIND_FIRST_BIT |
e80e7813 | 122 | select GENERIC_SMP_IDLE_THREAD |
79c74ecb | 123 | select GENERIC_TIME_VSYSCALL |
0e0d04a8 | 124 | select HAVE_ALIGNED_STRUCT_PAGE if SLUB |
7a017721 | 125 | select HAVE_ARCH_AUDITSYSCALL |
97433ea4 | 126 | select HAVE_ARCH_HARDENED_USERCOPY |
5a79859a | 127 | select HAVE_ARCH_JUMP_LABEL |
fff7fb0b | 128 | select CPU_NO_EFFICIENT_FFS if !HAVE_MARCH_Z9_109_FEATURES |
c63cb468 | 129 | select HAVE_ARCH_SECCOMP_FILTER |
5614dd92 | 130 | select HAVE_ARCH_SOFT_DIRTY |
0e0d04a8 | 131 | select HAVE_ARCH_TRACEHOOK |
5a79859a | 132 | select HAVE_ARCH_TRANSPARENT_HUGEPAGE |
6077776b | 133 | select HAVE_EBPF_JIT if PACK_STACK && HAVE_MARCH_Z196_FEATURES |
0e0d04a8 HC |
134 | select HAVE_CMPXCHG_DOUBLE |
135 | select HAVE_CMPXCHG_LOCAL | |
f50c0e63 | 136 | select HAVE_COPY_THREAD_TLS |
0e0d04a8 | 137 | select HAVE_DEBUG_KMEMLEAK |
e82becfc | 138 | select HAVE_DMA_API_DEBUG |
e1231b0e | 139 | select HAVE_DMA_CONTIGUOUS |
7844572c | 140 | select DMA_NOOP_OPS |
5a79859a HC |
141 | select HAVE_DYNAMIC_FTRACE |
142 | select HAVE_DYNAMIC_FTRACE_WITH_REGS | |
9078a549 | 143 | select HAVE_EFFICIENT_UNALIGNED_ACCESS |
5f56a5df | 144 | select HAVE_EXIT_THREAD |
0e0d04a8 | 145 | select HAVE_FTRACE_MCOUNT_RECORD |
5a79859a HC |
146 | select HAVE_FUNCTION_GRAPH_TRACER |
147 | select HAVE_FUNCTION_TRACER | |
03b8c7b6 | 148 | select HAVE_FUTEX_CMPXCHG if FUTEX |
0e0d04a8 HC |
149 | select HAVE_KERNEL_BZIP2 |
150 | select HAVE_KERNEL_GZIP | |
8e2872ce | 151 | select HAVE_KERNEL_LZ4 |
0e0d04a8 HC |
152 | select HAVE_KERNEL_LZMA |
153 | select HAVE_KERNEL_LZO | |
154 | select HAVE_KERNEL_XZ | |
155 | select HAVE_KPROBES | |
156 | select HAVE_KRETPROBES | |
5a79859a | 157 | select HAVE_KVM |
21042d43 | 158 | select HAVE_LIVEPATCH |
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 | |
c095a949 | 187 | default 4 |
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 | ||
843c48fd JG |
224 | choice |
225 | prompt "Processor type" | |
7072276e | 226 | default MARCH_Z196 |
1da177e4 | 227 | |
843c48fd JG |
228 | config MARCH_Z900 |
229 | bool "IBM zSeries model z800 and z900" | |
5a79859a | 230 | select HAVE_MARCH_Z900_FEATURES |
843c48fd JG |
231 | help |
232 | Select this to enable optimizations for model z800/z900 (2064 and | |
233 | 2066 series). This will enable some optimizations that are not | |
234 | available on older ESA/390 (31 Bit) only CPUs. | |
235 | ||
236 | config MARCH_Z990 | |
237 | bool "IBM zSeries model z890 and z990" | |
5a79859a | 238 | select HAVE_MARCH_Z990_FEATURES |
843c48fd JG |
239 | help |
240 | Select this to enable optimizations for model z890/z990 (2084 and | |
241 | 2086 series). The kernel will be slightly faster but will not work | |
242 | on older machines. | |
243 | ||
244 | config MARCH_Z9_109 | |
245 | bool "IBM System z9" | |
5a79859a | 246 | select HAVE_MARCH_Z9_109_FEATURES |
843c48fd JG |
247 | help |
248 | Select this to enable optimizations for IBM System z9 (2094 and | |
249 | 2096 series). The kernel will be slightly faster but will not work | |
250 | on older machines. | |
251 | ||
252 | config MARCH_Z10 | |
253 | bool "IBM System z10" | |
5a79859a | 254 | select HAVE_MARCH_Z10_FEATURES |
843c48fd JG |
255 | help |
256 | Select this to enable optimizations for IBM System z10 (2097 and | |
257 | 2098 series). The kernel will be slightly faster but will not work | |
258 | on older machines. | |
259 | ||
260 | config MARCH_Z196 | |
261 | bool "IBM zEnterprise 114 and 196" | |
5a79859a | 262 | select HAVE_MARCH_Z196_FEATURES |
843c48fd JG |
263 | help |
264 | Select this to enable optimizations for IBM zEnterprise 114 and 196 | |
265 | (2818 and 2817 series). The kernel will be slightly faster but will | |
266 | not work on older machines. | |
1da177e4 | 267 | |
991c1505 | 268 | config MARCH_ZEC12 |
59471227 | 269 | bool "IBM zBC12 and zEC12" |
5a79859a | 270 | select HAVE_MARCH_ZEC12_FEATURES |
991c1505 | 271 | help |
59471227 HC |
272 | Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and |
273 | 2827 series). The kernel will be slightly faster but will not work on | |
274 | older machines. | |
991c1505 | 275 | |
f8b2dcbd | 276 | config MARCH_Z13 |
bb3aa614 | 277 | bool "IBM z13s and z13" |
5a79859a | 278 | select HAVE_MARCH_Z13_FEATURES |
f8b2dcbd | 279 | help |
bb3aa614 HC |
280 | Select this to enable optimizations for IBM z13s and z13 (2965 and |
281 | 2964 series). The kernel will be slightly faster but will not work on | |
282 | older machines. | |
f8b2dcbd | 283 | |
843c48fd | 284 | endchoice |
1da177e4 | 285 | |
1db9e051 HC |
286 | config MARCH_Z900_TUNE |
287 | def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT | |
288 | ||
289 | config MARCH_Z990_TUNE | |
290 | def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT | |
291 | ||
292 | config MARCH_Z9_109_TUNE | |
293 | def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT | |
294 | ||
295 | config MARCH_Z10_TUNE | |
296 | def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT | |
297 | ||
298 | config MARCH_Z196_TUNE | |
299 | def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT | |
300 | ||
301 | config MARCH_ZEC12_TUNE | |
302 | def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT | |
303 | ||
f8b2dcbd MS |
304 | config MARCH_Z13_TUNE |
305 | def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT | |
306 | ||
1db9e051 HC |
307 | choice |
308 | prompt "Tune code generation" | |
309 | default TUNE_DEFAULT | |
310 | help | |
311 | Cause the compiler to tune (-mtune) the generated code for a machine. | |
312 | This will make the code run faster on the selected machine but | |
313 | somewhat slower on other machines. | |
314 | This option only changes how the compiler emits instructions, not the | |
315 | selection of instructions itself, so the resulting kernel will run on | |
316 | all other machines. | |
317 | ||
318 | config TUNE_DEFAULT | |
319 | bool "Default" | |
320 | help | |
321 | Tune the generated code for the target processor for which the kernel | |
322 | will be compiled. | |
323 | ||
1db9e051 HC |
324 | config TUNE_Z900 |
325 | bool "IBM zSeries model z800 and z900" | |
326 | ||
327 | config TUNE_Z990 | |
328 | bool "IBM zSeries model z890 and z990" | |
329 | ||
330 | config TUNE_Z9_109 | |
331 | bool "IBM System z9" | |
332 | ||
333 | config TUNE_Z10 | |
334 | bool "IBM System z10" | |
335 | ||
336 | config TUNE_Z196 | |
337 | bool "IBM zEnterprise 114 and 196" | |
338 | ||
339 | config TUNE_ZEC12 | |
340 | bool "IBM zBC12 and zEC12" | |
341 | ||
f8b2dcbd MS |
342 | config TUNE_Z13 |
343 | bool "IBM z13" | |
344 | ||
1db9e051 HC |
345 | endchoice |
346 | ||
347a8dc3 | 347 | config 64BIT |
6f9a3c33 | 348 | def_bool y |
d9f7a745 | 349 | |
843c48fd JG |
350 | config COMPAT |
351 | def_bool y | |
352 | prompt "Kernel support for 31 bit emulation" | |
843c48fd JG |
353 | select COMPAT_BINFMT_ELF if BINFMT_ELF |
354 | select ARCH_WANT_OLD_COMPAT_IPC | |
7eddd99c | 355 | select COMPAT_OLD_SIGACTION |
2813893f | 356 | depends on MULTIUSER |
843c48fd JG |
357 | help |
358 | Select this option if you want to enable your system kernel to | |
359 | handle system-calls from ELF binaries for 31 bit ESA. This option | |
360 | (and some other stuff like libraries and such) is needed for | |
361 | executing 31 bit applications. It is safe to say "Y". | |
362 | ||
363 | config SYSVIPC_COMPAT | |
364 | def_bool y if COMPAT && SYSVIPC | |
365 | ||
366 | config KEYS_COMPAT | |
367 | def_bool y if COMPAT && KEYS | |
368 | ||
1da177e4 | 369 | config SMP |
6f9a3c33 MS |
370 | def_bool y |
371 | prompt "Symmetric multi-processing support" | |
1da177e4 LT |
372 | ---help--- |
373 | This enables support for systems with more than one CPU. If you have | |
374 | a system with only one CPU, like most personal computers, say N. If | |
375 | you have a system with more than one CPU, say Y. | |
376 | ||
4a474157 | 377 | If you say N here, the kernel will run on uni- and multiprocessor |
1da177e4 LT |
378 | machines, but will use only one CPU of a multiprocessor machine. If |
379 | you say Y here, the kernel will run on many, but not all, | |
4a474157 | 380 | uniprocessor machines. On a uniprocessor machine, the kernel |
1da177e4 LT |
381 | will run faster if you say N here. |
382 | ||
03502faa AB |
383 | See also the SMP-HOWTO available at |
384 | <http://www.tldp.org/docs.html#howto>. | |
1da177e4 LT |
385 | |
386 | Even if you don't know what to do here, say Y. | |
387 | ||
388 | config NR_CPUS | |
5c75a0da HC |
389 | int "Maximum number of CPUs (2-512)" |
390 | range 2 512 | |
1da177e4 | 391 | depends on SMP |
5a79859a | 392 | default "64" |
1da177e4 LT |
393 | help |
394 | This allows you to specify the maximum number of CPUs which this | |
5c75a0da | 395 | kernel will support. The maximum supported value is 512 and the |
1da177e4 LT |
396 | minimum value which makes sense is 2. |
397 | ||
398 | This is purely to save memory - each supported CPU adds | |
399 | approximately sixteen kilobytes to the kernel image. | |
400 | ||
401 | config HOTPLUG_CPU | |
6f9a3c33 MS |
402 | def_bool y |
403 | prompt "Support for hot-pluggable CPUs" | |
1da177e4 | 404 | depends on SMP |
1da177e4 LT |
405 | help |
406 | Say Y here to be able to turn CPUs off and on. CPUs | |
407 | can be controlled through /sys/devices/system/cpu/cpu#. | |
408 | Say N if you want to disable CPU hotplug. | |
409 | ||
3a368f74 PH |
410 | # Some NUMA nodes have memory ranges that span |
411 | # other nodes. Even though a pfn is valid and | |
412 | # between a node's start and end pfns, it may not | |
413 | # reside on that node. See memmap_init_zone() | |
414 | # for details. <- They meant memory holes! | |
415 | config NODES_SPAN_OTHER_NODES | |
416 | def_bool NUMA | |
417 | ||
418 | config NUMA | |
419 | bool "NUMA support" | |
c095a949 | 420 | depends on SMP && SCHED_TOPOLOGY |
3a368f74 PH |
421 | default n |
422 | help | |
423 | Enable NUMA support | |
424 | ||
425 | This option adds NUMA support to the kernel. | |
426 | ||
427 | An operation mode can be selected by appending | |
428 | numa=<method> to the kernel command line. | |
429 | ||
430 | The default behaviour is identical to appending numa=plain to | |
431 | the command line. This will create just one node with all | |
432 | available memory and all CPUs in it. | |
433 | ||
434 | config NODES_SHIFT | |
435 | int "Maximum NUMA nodes (as a power of 2)" | |
436 | range 1 10 | |
437 | depends on NUMA | |
438 | default "4" | |
439 | help | |
440 | Specify the maximum number of NUMA nodes available on the target | |
441 | system. Increases memory reserved to accommodate various tables. | |
442 | ||
c29a7baf MH |
443 | menu "Select NUMA modes" |
444 | depends on NUMA | |
445 | ||
446 | config NUMA_EMU | |
447 | bool "NUMA emulation" | |
448 | default y | |
449 | help | |
450 | Numa emulation mode will split the available system memory into | |
451 | equal chunks which then are distributed over the configured number | |
452 | of nodes in a round-robin manner. | |
453 | ||
454 | The number of fake nodes is limited by the number of available memory | |
455 | chunks (i.e. memory size / fake size) and the number of supported | |
456 | nodes in the kernel. | |
457 | ||
458 | The CPUs are assigned to the nodes in a way that partially respects | |
459 | the original machine topology (if supported by the machine). | |
460 | Fair distribution of the CPUs is not guaranteed. | |
461 | ||
462 | config EMU_SIZE | |
463 | hex "NUMA emulation memory chunk size" | |
464 | default 0x10000000 | |
465 | range 0x400000 0x100000000 | |
466 | depends on NUMA_EMU | |
467 | help | |
468 | Select the default size by which the memory is chopped and then | |
469 | assigned to emulated NUMA nodes. | |
470 | ||
471 | This can be overridden by specifying | |
472 | ||
473 | emu_size=<n> | |
474 | ||
475 | on the kernel command line where also suffixes K, M, G, and T are | |
476 | supported. | |
477 | ||
478 | endmenu | |
9236b4dd HC |
479 | |
480 | config SCHED_SMT | |
481 | def_bool n | |
c29a7baf | 482 | |
8d11e021 | 483 | config SCHED_MC |
83a24e32 | 484 | def_bool n |
8d11e021 | 485 | |
4cb14bc8 | 486 | config SCHED_BOOK |
10ad34bc MS |
487 | def_bool n |
488 | ||
adac0f1e HC |
489 | config SCHED_DRAWER |
490 | def_bool n | |
491 | ||
10ad34bc | 492 | config SCHED_TOPOLOGY |
6f9a3c33 | 493 | def_bool y |
10ad34bc | 494 | prompt "Topology scheduler support" |
83a24e32 | 495 | depends on SMP |
10ad34bc | 496 | select SCHED_SMT |
83a24e32 | 497 | select SCHED_MC |
10ad34bc | 498 | select SCHED_BOOK |
adac0f1e | 499 | select SCHED_DRAWER |
4cb14bc8 | 500 | help |
10ad34bc MS |
501 | Topology scheduler support improves the CPU scheduler's decision |
502 | making when dealing with machines that have multi-threading, | |
503 | multiple cores or multiple books. | |
4cb14bc8 | 504 | |
843c48fd JG |
505 | source kernel/Kconfig.preempt |
506 | ||
843c48fd | 507 | source kernel/Kconfig.hz |
1da177e4 | 508 | |
843c48fd | 509 | endmenu |
1da177e4 | 510 | |
843c48fd | 511 | menu "Memory setup" |
1d057720 | 512 | |
843c48fd | 513 | config ARCH_SPARSEMEM_ENABLE |
6f9a3c33 | 514 | def_bool y |
843c48fd JG |
515 | select SPARSEMEM_VMEMMAP_ENABLE |
516 | select SPARSEMEM_VMEMMAP | |
e65e1fc2 | 517 | |
843c48fd JG |
518 | config ARCH_SPARSEMEM_DEFAULT |
519 | def_bool y | |
1da177e4 | 520 | |
843c48fd JG |
521 | config ARCH_SELECT_MEMORY_MODEL |
522 | def_bool y | |
1da177e4 | 523 | |
843c48fd JG |
524 | config ARCH_ENABLE_MEMORY_HOTPLUG |
525 | def_bool y if SPARSEMEM | |
0efa4703 | 526 | |
843c48fd JG |
527 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
528 | def_bool y | |
e37f50e1 | 529 | |
ec66ad66 MS |
530 | config ARCH_ENABLE_SPLIT_PMD_PTLOCK |
531 | def_bool y | |
ec66ad66 | 532 | |
843c48fd JG |
533 | config FORCE_MAX_ZONEORDER |
534 | int | |
535 | default "9" | |
f861e405 | 536 | |
843c48fd | 537 | source "mm/Kconfig" |
1da177e4 LT |
538 | |
539 | config PACK_STACK | |
6f9a3c33 MS |
540 | def_bool y |
541 | prompt "Pack kernel stack" | |
1da177e4 LT |
542 | help |
543 | This option enables the compiler option -mkernel-backchain if it | |
544 | is available. If the option is available the compiler supports | |
545 | the new stack layout which dramatically reduces the minimum stack | |
546 | frame size. With an old compiler a non-leaf function needs a | |
547 | minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With | |
548 | -mkernel-backchain the minimum size drops to 16 byte on 31 bit | |
549 | and 24 byte on 64 bit. | |
550 | ||
551 | Say Y if you are unsure. | |
552 | ||
1da177e4 | 553 | config CHECK_STACK |
6f9a3c33 MS |
554 | def_bool y |
555 | prompt "Detect kernel stack overflow" | |
1da177e4 LT |
556 | help |
557 | This option enables the compiler option -mstack-guard and | |
558 | -mstack-size if they are available. If the compiler supports them | |
559 | it will emit additional code to each function prolog to trigger | |
560 | an illegal operation if the kernel stack is about to overflow. | |
561 | ||
562 | Say N if you are unsure. | |
563 | ||
564 | config STACK_GUARD | |
565 | int "Size of the guard area (128-1024)" | |
566 | range 128 1024 | |
567 | depends on CHECK_STACK | |
568 | default "256" | |
569 | help | |
570 | This allows you to specify the size of the guard area at the lower | |
571 | end of the kernel stack. If the kernel stack points into the guard | |
572 | area on function entry an illegal operation is triggered. The size | |
573 | needs to be a power of 2. Please keep in mind that the size of an | |
574 | interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit. | |
575 | The minimum size for the stack guard should be 256 for 31 bit and | |
576 | 512 for 64 bit. | |
577 | ||
2c190da4 | 578 | config WARN_DYNAMIC_STACK |
6f9a3c33 | 579 | def_bool n |
2c190da4 | 580 | prompt "Emit compiler warnings for function with dynamic stack usage" |
1da177e4 | 581 | help |
2c190da4 JG |
582 | This option enables the compiler option -mwarn-dynamicstack. If the |
583 | compiler supports this options generates warnings for functions | |
584 | that dynamically allocate stack space using alloca. | |
1da177e4 LT |
585 | |
586 | Say N if you are unsure. | |
587 | ||
843c48fd | 588 | endmenu |
3f22ab27 | 589 | |
843c48fd | 590 | menu "I/O subsystem" |
1da177e4 | 591 | |
1da177e4 | 592 | config QDIO |
6f9a3c33 MS |
593 | def_tristate y |
594 | prompt "QDIO support" | |
1da177e4 | 595 | ---help--- |
8129ee16 | 596 | This driver provides the Queued Direct I/O base support for |
efca13bc | 597 | IBM System z. |
1da177e4 LT |
598 | |
599 | To compile this driver as a module, choose M here: the | |
600 | module will be called qdio. | |
601 | ||
602 | If unsure, say Y. | |
603 | ||
c8717a3d JG |
604 | menuconfig PCI |
605 | bool "PCI support" | |
c8717a3d | 606 | select PCI_MSI |
8128f23c | 607 | select IOMMU_SUPPORT |
c8717a3d JG |
608 | help |
609 | Enable PCI support. | |
610 | ||
611 | if PCI | |
612 | ||
613 | config PCI_NR_FUNCTIONS | |
614 | int "Maximum number of PCI functions (1-4096)" | |
615 | range 1 4096 | |
616 | default "64" | |
617 | help | |
618 | This allows you to specify the maximum number of PCI functions which | |
619 | this kernel will support. | |
620 | ||
621 | source "drivers/pci/Kconfig" | |
c8717a3d JG |
622 | |
623 | endif # PCI | |
624 | ||
625 | config PCI_DOMAINS | |
626 | def_bool PCI | |
627 | ||
628 | config HAS_IOMEM | |
629 | def_bool PCI | |
630 | ||
631 | config IOMMU_HELPER | |
632 | def_bool PCI | |
633 | ||
c8717a3d JG |
634 | config NEED_SG_DMA_LENGTH |
635 | def_bool PCI | |
636 | ||
91630032 JG |
637 | config NEED_DMA_MAP_STATE |
638 | def_bool PCI | |
639 | ||
9d92a7e1 | 640 | config CHSC_SCH |
d9c11b1e | 641 | def_tristate m |
6f9a3c33 | 642 | prompt "Support for CHSC subchannels" |
9d92a7e1 CH |
643 | help |
644 | This driver allows usage of CHSC subchannels. A CHSC subchannel | |
645 | is usually present on LPAR only. | |
646 | The driver creates a device /dev/chsc, which may be used to | |
647 | obtain I/O configuration information about the machine and | |
648 | to issue asynchronous chsc commands (DANGEROUS). | |
649 | You will usually only want to use this interface on a special | |
650 | LPAR designated for system management. | |
651 | ||
652 | To compile this driver as a module, choose M here: the | |
653 | module will be called chsc_sch. | |
654 | ||
655 | If unsure, say N. | |
656 | ||
1d1c8f78 SO |
657 | config SCM_BUS |
658 | def_bool y | |
1d1c8f78 SO |
659 | prompt "SCM bus driver" |
660 | help | |
661 | Bus driver for Storage Class Memory. | |
662 | ||
eadb86ab SO |
663 | config EADM_SCH |
664 | def_tristate m | |
665 | prompt "Support for EADM subchannels" | |
666 | depends on SCM_BUS | |
667 | help | |
668 | This driver allows usage of EADM subchannels. EADM subchannels act | |
669 | as a communication vehicle for SCM increments. | |
670 | ||
671 | To compile this driver as a module, choose M here: the | |
672 | module will be called eadm_sch. | |
673 | ||
843c48fd JG |
674 | endmenu |
675 | ||
676 | menu "Dump support" | |
677 | ||
678 | config CRASH_DUMP | |
679 | bool "kernel crash dumps" | |
5a79859a | 680 | depends on SMP |
843c48fd JG |
681 | select KEXEC |
682 | help | |
683 | Generate crash dump after being started by kexec. | |
684 | Crash dump kernels are loaded in the main kernel with kexec-tools | |
685 | into a specially reserved region and then later executed after | |
686 | a crash by kdump/kexec. | |
843c48fd | 687 | Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this. |
bf28a597 MH |
688 | This option also enables s390 zfcpdump. |
689 | See also <file:Documentation/s390/zfcpdump.txt> | |
843c48fd JG |
690 | |
691 | endmenu | |
692 | ||
693 | menu "Executable file formats / Emulations" | |
1da177e4 | 694 | |
1da177e4 LT |
695 | source "fs/Kconfig.binfmt" |
696 | ||
843c48fd JG |
697 | config SECCOMP |
698 | def_bool y | |
699 | prompt "Enable seccomp to safely compute untrusted bytecode" | |
700 | depends on PROC_FS | |
701 | help | |
702 | This kernel feature is useful for number crunching applications | |
703 | that may need to compute untrusted bytecode during their | |
704 | execution. By using pipes or other transports made available to | |
705 | the process as file descriptors supporting the read/write | |
706 | syscalls, it's possible to isolate those applications in | |
707 | their own address space using seccomp. Once seccomp is | |
708 | enabled via /proc/<pid>/seccomp, it cannot be disabled | |
709 | and the task is only allowed to execute a few safe syscalls | |
710 | defined by each seccomp mode. | |
711 | ||
712 | If unsure, say Y. | |
713 | ||
714 | endmenu | |
715 | ||
716 | menu "Power Management" | |
717 | ||
718 | config ARCH_HIBERNATION_POSSIBLE | |
5a79859a | 719 | def_bool y |
843c48fd JG |
720 | |
721 | source "kernel/power/Kconfig" | |
722 | ||
723 | endmenu | |
724 | ||
725 | source "net/Kconfig" | |
726 | ||
727 | config PCMCIA | |
728 | def_bool n | |
729 | ||
730 | config CCW | |
731 | def_bool y | |
732 | ||
733 | source "drivers/Kconfig" | |
734 | ||
735 | source "fs/Kconfig" | |
736 | ||
737 | source "arch/s390/Kconfig.debug" | |
738 | ||
739 | source "security/Kconfig" | |
740 | ||
741 | source "crypto/Kconfig" | |
742 | ||
743 | source "lib/Kconfig" | |
744 | ||
745 | menu "Virtualization" | |
684de39b | 746 | |
1da177e4 | 747 | config PFAULT |
6f9a3c33 MS |
748 | def_bool y |
749 | prompt "Pseudo page fault support" | |
1da177e4 LT |
750 | help |
751 | Select this option, if you want to use PFAULT pseudo page fault | |
752 | handling under VM. If running native or in LPAR, this option | |
753 | has no effect. If your VM does not support PFAULT, PAGEEX | |
754 | pseudo page fault handling will be used. | |
755 | Note that VM 4.2 supports PFAULT but has a bug in its | |
756 | implementation that causes some problems. | |
757 | Everybody who wants to run Linux under VM != VM4.2 should select | |
758 | this option. | |
759 | ||
760 | config SHARED_KERNEL | |
0eccc783 HC |
761 | bool "VM shared kernel support" |
762 | depends on !JUMP_LABEL | |
1da177e4 LT |
763 | help |
764 | Select this option, if you want to share the text segment of the | |
765 | Linux kernel between different VM guests. This reduces memory | |
766 | usage with lots of guests but greatly increases kernel size. | |
9c9c1761 HC |
767 | Also if a kernel was IPL'ed from a shared segment the kexec system |
768 | call will not work. | |
1da177e4 LT |
769 | You should only select this option if you know what you are |
770 | doing and want to exploit this feature. | |
771 | ||
772 | config CMM | |
6f9a3c33 MS |
773 | def_tristate n |
774 | prompt "Cooperative memory management" | |
1da177e4 LT |
775 | help |
776 | Select this option, if you want to enable the kernel interface | |
777 | to reduce the memory size of the system. This is accomplished | |
778 | by allocating pages of memory and put them "on hold". This only | |
779 | makes sense for a system running under VM where the unused pages | |
780 | will be reused by VM for other guest systems. The interface | |
781 | allows an external monitor to balance memory of many systems. | |
782 | Everybody who wants to run Linux under VM should select this | |
783 | option. | |
784 | ||
1da177e4 | 785 | config CMM_IUCV |
6f9a3c33 MS |
786 | def_bool y |
787 | prompt "IUCV special message interface to cooperative memory management" | |
1da177e4 LT |
788 | depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV) |
789 | help | |
790 | Select this option to enable the special message interface to | |
791 | the cooperative memory management. | |
792 | ||
1da177e4 | 793 | config APPLDATA_BASE |
6f9a3c33 MS |
794 | def_bool n |
795 | prompt "Linux - VM Monitor Stream, base infrastructure" | |
c185b783 | 796 | depends on PROC_FS |
1da177e4 LT |
797 | help |
798 | This provides a kernel interface for creating and updating z/VM APPLDATA | |
799 | monitor records. The monitor records are updated at certain time | |
800 | intervals, once the timer is started. | |
801 | Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer, | |
802 | i.e. enables or disables monitoring on the Linux side. | |
803 | A custom interval value (in seconds) can be written to | |
804 | /proc/appldata/interval. | |
805 | ||
806 | Defaults are 60 seconds interval and timer off. | |
807 | The /proc entries can also be read from, showing the current settings. | |
808 | ||
809 | config APPLDATA_MEM | |
6f9a3c33 MS |
810 | def_tristate m |
811 | prompt "Monitor memory management statistics" | |
62fb2ba3 | 812 | depends on APPLDATA_BASE && VM_EVENT_COUNTERS |
1da177e4 LT |
813 | help |
814 | This provides memory management related data to the Linux - VM Monitor | |
815 | Stream, like paging/swapping rate, memory utilisation, etc. | |
816 | Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM | |
817 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
818 | on the z/VM side. | |
819 | ||
820 | Default is disabled. | |
821 | The /proc entry can also be read from, showing the current settings. | |
822 | ||
823 | This can also be compiled as a module, which will be called | |
824 | appldata_mem.o. | |
825 | ||
826 | config APPLDATA_OS | |
6f9a3c33 MS |
827 | def_tristate m |
828 | prompt "Monitor OS statistics" | |
1da177e4 LT |
829 | depends on APPLDATA_BASE |
830 | help | |
831 | This provides OS related data to the Linux - VM Monitor Stream, like | |
832 | CPU utilisation, etc. | |
833 | Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM | |
834 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
835 | on the z/VM side. | |
836 | ||
837 | Default is disabled. | |
838 | This can also be compiled as a module, which will be called | |
839 | appldata_os.o. | |
840 | ||
841 | config APPLDATA_NET_SUM | |
6f9a3c33 MS |
842 | def_tristate m |
843 | prompt "Monitor overall network statistics" | |
70193af9 | 844 | depends on APPLDATA_BASE && NET |
1da177e4 LT |
845 | help |
846 | This provides network related data to the Linux - VM Monitor Stream, | |
847 | currently there is only a total sum of network I/O statistics, no | |
848 | per-interface data. | |
849 | Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM | |
850 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
851 | on the z/VM side. | |
852 | ||
853 | Default is disabled. | |
854 | This can also be compiled as a module, which will be called | |
855 | appldata_net_sum.o. | |
856 | ||
24bbb1fa | 857 | config S390_HYPFS_FS |
6f9a3c33 MS |
858 | def_bool y |
859 | prompt "s390 hypervisor file system support" | |
24bbb1fa | 860 | select SYS_HYPERVISOR |
24bbb1fa MH |
861 | help |
862 | This is a virtual file system intended to provide accounting | |
863 | information in an s390 hypervisor environment. | |
864 | ||
843c48fd | 865 | source "arch/s390/kvm/Kconfig" |
411ed322 | 866 | |
fa587743 | 867 | config S390_GUEST |
6f9a3c33 | 868 | def_bool y |
510cf5a6 | 869 | prompt "s390 support for virtio devices" |
79b6f7fb | 870 | select TTY |
80629b0b | 871 | select VIRTUALIZATION |
fa587743 | 872 | select VIRTIO |
faeba830 | 873 | select VIRTIO_CONSOLE |
fa587743 | 874 | help |
bdd1fc27 CH |
875 | Enabling this option adds support for virtio based paravirtual device |
876 | drivers on s390. | |
1da177e4 | 877 | |
20766c08 | 878 | Select this option if you want to run the kernel as a guest under |
bdd1fc27 | 879 | the KVM hypervisor. |
155af2f9 | 880 | |
3b2fbb3f CH |
881 | config S390_GUEST_OLD_TRANSPORT |
882 | def_bool y | |
883 | prompt "Guest support for old s390 virtio transport (DEPRECATED)" | |
884 | depends on S390_GUEST | |
885 | help | |
886 | Enable this option to add support for the old s390-virtio | |
887 | transport (i.e. virtio devices NOT based on virtio-ccw). This | |
888 | type of virtio devices is only available on the experimental | |
889 | kuli userspace or with old (< 2.6) qemu. If you are running | |
890 | with a modern version of qemu (which supports virtio-ccw since | |
891 | 1.4 and uses it by default since version 2.4), you probably won't | |
892 | need this. | |
893 | ||
155af2f9 | 894 | endmenu |