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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 | |
2b105ff9 | 7 | config LOCKDEP_SUPPORT |
61d48c2c | 8 | def_bool y |
2b105ff9 | 9 | |
5bdc9b44 | 10 | config STACKTRACE_SUPPORT |
61d48c2c | 11 | def_bool y |
5bdc9b44 | 12 | |
a3afe70b HC |
13 | config HAVE_LATENCYTOP_SUPPORT |
14 | def_bool y | |
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 |
0e0d04a8 | 67 | select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE |
93bead43 | 68 | select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS |
2b68f6ca | 69 | select ARCH_HAS_ELF_RANDOMIZE |
957e3fac | 70 | select ARCH_HAS_GCOV_PROFILE_ALL |
47523c98 | 71 | select ARCH_HAS_SG_CHAIN |
0e0d04a8 | 72 | select ARCH_HAVE_NMI_SAFE_CMPXCHG |
6beb0009 TG |
73 | select ARCH_INLINE_READ_LOCK |
74 | select ARCH_INLINE_READ_LOCK_BH | |
75 | select ARCH_INLINE_READ_LOCK_IRQ | |
76 | select ARCH_INLINE_READ_LOCK_IRQSAVE | |
0e0d04a8 | 77 | select ARCH_INLINE_READ_TRYLOCK |
6beb0009 TG |
78 | select ARCH_INLINE_READ_UNLOCK |
79 | select ARCH_INLINE_READ_UNLOCK_BH | |
80 | select ARCH_INLINE_READ_UNLOCK_IRQ | |
81 | select ARCH_INLINE_READ_UNLOCK_IRQRESTORE | |
0e0d04a8 HC |
82 | select ARCH_INLINE_SPIN_LOCK |
83 | select ARCH_INLINE_SPIN_LOCK_BH | |
84 | select ARCH_INLINE_SPIN_LOCK_IRQ | |
85 | select ARCH_INLINE_SPIN_LOCK_IRQSAVE | |
86 | select ARCH_INLINE_SPIN_TRYLOCK | |
87 | select ARCH_INLINE_SPIN_TRYLOCK_BH | |
88 | select ARCH_INLINE_SPIN_UNLOCK | |
89 | select ARCH_INLINE_SPIN_UNLOCK_BH | |
90 | select ARCH_INLINE_SPIN_UNLOCK_IRQ | |
91 | select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE | |
6beb0009 TG |
92 | select ARCH_INLINE_WRITE_LOCK |
93 | select ARCH_INLINE_WRITE_LOCK_BH | |
94 | select ARCH_INLINE_WRITE_LOCK_IRQ | |
95 | select ARCH_INLINE_WRITE_LOCK_IRQSAVE | |
0e0d04a8 | 96 | select ARCH_INLINE_WRITE_TRYLOCK |
6beb0009 TG |
97 | select ARCH_INLINE_WRITE_UNLOCK |
98 | select ARCH_INLINE_WRITE_UNLOCK_BH | |
99 | select ARCH_INLINE_WRITE_UNLOCK_IRQ | |
100 | select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE | |
0e0d04a8 | 101 | select ARCH_SAVE_PAGE_KEYS if HIBERNATION |
36e7fdaa | 102 | select ARCH_SUPPORTS_ATOMIC_RMW |
a763bc8b | 103 | select ARCH_SUPPORTS_NUMA_BALANCING |
295d8fa9 | 104 | select ARCH_USE_BUILTIN_BSWAP |
efc1d23b | 105 | select ARCH_USE_CMPXCHG_LOCKREF |
a763bc8b | 106 | select ARCH_WANTS_PROT_NUMA_PROT_NONE |
c1d7e01d | 107 | select ARCH_WANT_IPC_PARSE_VERSION |
0e0d04a8 HC |
108 | select BUILDTIME_EXTABLE_SORT |
109 | select CLONE_BACKWARDS2 | |
5d6a0163 | 110 | select DYNAMIC_FTRACE if FUNCTION_TRACER |
0e0d04a8 | 111 | select GENERIC_CLOCKEVENTS |
8f00b3e2 | 112 | select GENERIC_CPU_AUTOPROBE |
0e0d04a8 | 113 | select GENERIC_CPU_DEVICES if !SMP |
746479cd | 114 | select GENERIC_FIND_FIRST_BIT |
e80e7813 | 115 | select GENERIC_SMP_IDLE_THREAD |
79c74ecb | 116 | select GENERIC_TIME_VSYSCALL |
0e0d04a8 | 117 | select HAVE_ALIGNED_STRUCT_PAGE if SLUB |
7a017721 | 118 | select HAVE_ARCH_AUDITSYSCALL |
a763bc8b | 119 | select HAVE_ARCH_EARLY_PFN_TO_NID |
5a79859a | 120 | select HAVE_ARCH_JUMP_LABEL |
c63cb468 | 121 | select HAVE_ARCH_SECCOMP_FILTER |
5614dd92 | 122 | select HAVE_ARCH_SOFT_DIRTY |
0e0d04a8 | 123 | select HAVE_ARCH_TRACEHOOK |
5a79859a | 124 | select HAVE_ARCH_TRANSPARENT_HUGEPAGE |
77a87f0c | 125 | select HAVE_BPF_JIT if PACK_STACK && HAVE_MARCH_Z196_FEATURES |
0e0d04a8 HC |
126 | select HAVE_CMPXCHG_DOUBLE |
127 | select HAVE_CMPXCHG_LOCAL | |
0e0d04a8 | 128 | select HAVE_DEBUG_KMEMLEAK |
5a79859a HC |
129 | select HAVE_DYNAMIC_FTRACE |
130 | select HAVE_DYNAMIC_FTRACE_WITH_REGS | |
0e0d04a8 | 131 | select HAVE_FTRACE_MCOUNT_RECORD |
5a79859a HC |
132 | select HAVE_FUNCTION_GRAPH_TRACER |
133 | select HAVE_FUNCTION_TRACER | |
03b8c7b6 | 134 | select HAVE_FUTEX_CMPXCHG if FUTEX |
0e0d04a8 HC |
135 | select HAVE_KERNEL_BZIP2 |
136 | select HAVE_KERNEL_GZIP | |
8e2872ce | 137 | select HAVE_KERNEL_LZ4 |
0e0d04a8 HC |
138 | select HAVE_KERNEL_LZMA |
139 | select HAVE_KERNEL_LZO | |
140 | select HAVE_KERNEL_XZ | |
141 | select HAVE_KPROBES | |
142 | select HAVE_KRETPROBES | |
5a79859a | 143 | select HAVE_KVM |
21042d43 | 144 | select HAVE_LIVEPATCH |
0e0d04a8 HC |
145 | select HAVE_MEMBLOCK |
146 | select HAVE_MEMBLOCK_NODE_MAP | |
50be6345 | 147 | select HAVE_MEMBLOCK_PHYS_MAP |
786d35d4 | 148 | select HAVE_MOD_ARCH_SPECIFIC |
0e0d04a8 HC |
149 | select HAVE_OPROFILE |
150 | select HAVE_PERF_EVENTS | |
151 | select HAVE_REGS_AND_STACK_ACCESS_API | |
152 | select HAVE_SYSCALL_TRACEPOINTS | |
0e0d04a8 | 153 | select HAVE_VIRT_CPU_ACCOUNTING |
786d35d4 | 154 | select MODULES_USE_ELF_RELA |
50be6345 | 155 | select NO_BOOTMEM |
7eddd99c | 156 | select OLD_SIGACTION |
93bead43 | 157 | select OLD_SIGSUSPEND3 |
0e0d04a8 | 158 | select SYSCTL_EXCEPTION_TRACE |
0563416b | 159 | select TTY |
0e0d04a8 | 160 | select VIRT_CPU_ACCOUNTING |
93bead43 | 161 | select VIRT_TO_BUS |
3a368f74 | 162 | |
1da177e4 | 163 | |
fca3e357 | 164 | config SCHED_OMIT_FRAME_POINTER |
6f9a3c33 | 165 | def_bool y |
fca3e357 | 166 | |
c81956c9 KS |
167 | config PGTABLE_LEVELS |
168 | int | |
c095a949 | 169 | default 4 |
c81956c9 | 170 | |
1da177e4 LT |
171 | source "init/Kconfig" |
172 | ||
dc52ddc0 MH |
173 | source "kernel/Kconfig.freezer" |
174 | ||
21042d43 JS |
175 | source "kernel/livepatch/Kconfig" |
176 | ||
843c48fd JG |
177 | menu "Processor type and features" |
178 | ||
179 | config HAVE_MARCH_Z900_FEATURES | |
180 | def_bool n | |
181 | ||
182 | config HAVE_MARCH_Z990_FEATURES | |
183 | def_bool n | |
184 | select HAVE_MARCH_Z900_FEATURES | |
185 | ||
186 | config HAVE_MARCH_Z9_109_FEATURES | |
187 | def_bool n | |
188 | select HAVE_MARCH_Z990_FEATURES | |
189 | ||
190 | config HAVE_MARCH_Z10_FEATURES | |
191 | def_bool n | |
192 | select HAVE_MARCH_Z9_109_FEATURES | |
193 | ||
194 | config HAVE_MARCH_Z196_FEATURES | |
195 | def_bool n | |
196 | select HAVE_MARCH_Z10_FEATURES | |
197 | ||
991c1505 HC |
198 | config HAVE_MARCH_ZEC12_FEATURES |
199 | def_bool n | |
200 | select HAVE_MARCH_Z196_FEATURES | |
201 | ||
f8b2dcbd MS |
202 | config HAVE_MARCH_Z13_FEATURES |
203 | def_bool n | |
204 | select HAVE_MARCH_ZEC12_FEATURES | |
205 | ||
843c48fd JG |
206 | choice |
207 | prompt "Processor type" | |
5a79859a | 208 | default MARCH_Z900 |
1da177e4 | 209 | |
843c48fd JG |
210 | config MARCH_Z900 |
211 | bool "IBM zSeries model z800 and z900" | |
5a79859a | 212 | select HAVE_MARCH_Z900_FEATURES |
843c48fd JG |
213 | help |
214 | Select this to enable optimizations for model z800/z900 (2064 and | |
215 | 2066 series). This will enable some optimizations that are not | |
216 | available on older ESA/390 (31 Bit) only CPUs. | |
217 | ||
218 | config MARCH_Z990 | |
219 | bool "IBM zSeries model z890 and z990" | |
5a79859a | 220 | select HAVE_MARCH_Z990_FEATURES |
843c48fd JG |
221 | help |
222 | Select this to enable optimizations for model z890/z990 (2084 and | |
223 | 2086 series). The kernel will be slightly faster but will not work | |
224 | on older machines. | |
225 | ||
226 | config MARCH_Z9_109 | |
227 | bool "IBM System z9" | |
5a79859a | 228 | select HAVE_MARCH_Z9_109_FEATURES |
843c48fd JG |
229 | help |
230 | Select this to enable optimizations for IBM System z9 (2094 and | |
231 | 2096 series). The kernel will be slightly faster but will not work | |
232 | on older machines. | |
233 | ||
234 | config MARCH_Z10 | |
235 | bool "IBM System z10" | |
5a79859a | 236 | select HAVE_MARCH_Z10_FEATURES |
843c48fd JG |
237 | help |
238 | Select this to enable optimizations for IBM System z10 (2097 and | |
239 | 2098 series). The kernel will be slightly faster but will not work | |
240 | on older machines. | |
241 | ||
242 | config MARCH_Z196 | |
243 | bool "IBM zEnterprise 114 and 196" | |
5a79859a | 244 | select HAVE_MARCH_Z196_FEATURES |
843c48fd JG |
245 | help |
246 | Select this to enable optimizations for IBM zEnterprise 114 and 196 | |
247 | (2818 and 2817 series). The kernel will be slightly faster but will | |
248 | not work on older machines. | |
1da177e4 | 249 | |
991c1505 | 250 | config MARCH_ZEC12 |
59471227 | 251 | bool "IBM zBC12 and zEC12" |
5a79859a | 252 | select HAVE_MARCH_ZEC12_FEATURES |
991c1505 | 253 | help |
59471227 HC |
254 | Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and |
255 | 2827 series). The kernel will be slightly faster but will not work on | |
256 | older machines. | |
991c1505 | 257 | |
f8b2dcbd MS |
258 | config MARCH_Z13 |
259 | bool "IBM z13" | |
5a79859a | 260 | select HAVE_MARCH_Z13_FEATURES |
f8b2dcbd MS |
261 | help |
262 | Select this to enable optimizations for IBM z13 (2964 series). | |
263 | The kernel will be slightly faster but will not work on older | |
264 | machines. | |
265 | ||
843c48fd | 266 | endchoice |
1da177e4 | 267 | |
1db9e051 HC |
268 | config MARCH_Z900_TUNE |
269 | def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT | |
270 | ||
271 | config MARCH_Z990_TUNE | |
272 | def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT | |
273 | ||
274 | config MARCH_Z9_109_TUNE | |
275 | def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT | |
276 | ||
277 | config MARCH_Z10_TUNE | |
278 | def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT | |
279 | ||
280 | config MARCH_Z196_TUNE | |
281 | def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT | |
282 | ||
283 | config MARCH_ZEC12_TUNE | |
284 | def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT | |
285 | ||
f8b2dcbd MS |
286 | config MARCH_Z13_TUNE |
287 | def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT | |
288 | ||
1db9e051 HC |
289 | choice |
290 | prompt "Tune code generation" | |
291 | default TUNE_DEFAULT | |
292 | help | |
293 | Cause the compiler to tune (-mtune) the generated code for a machine. | |
294 | This will make the code run faster on the selected machine but | |
295 | somewhat slower on other machines. | |
296 | This option only changes how the compiler emits instructions, not the | |
297 | selection of instructions itself, so the resulting kernel will run on | |
298 | all other machines. | |
299 | ||
300 | config TUNE_DEFAULT | |
301 | bool "Default" | |
302 | help | |
303 | Tune the generated code for the target processor for which the kernel | |
304 | will be compiled. | |
305 | ||
1db9e051 HC |
306 | config TUNE_Z900 |
307 | bool "IBM zSeries model z800 and z900" | |
308 | ||
309 | config TUNE_Z990 | |
310 | bool "IBM zSeries model z890 and z990" | |
311 | ||
312 | config TUNE_Z9_109 | |
313 | bool "IBM System z9" | |
314 | ||
315 | config TUNE_Z10 | |
316 | bool "IBM System z10" | |
317 | ||
318 | config TUNE_Z196 | |
319 | bool "IBM zEnterprise 114 and 196" | |
320 | ||
321 | config TUNE_ZEC12 | |
322 | bool "IBM zBC12 and zEC12" | |
323 | ||
f8b2dcbd MS |
324 | config TUNE_Z13 |
325 | bool "IBM z13" | |
326 | ||
1db9e051 HC |
327 | endchoice |
328 | ||
347a8dc3 | 329 | config 64BIT |
6f9a3c33 | 330 | def_bool y |
d9f7a745 | 331 | |
843c48fd JG |
332 | config COMPAT |
333 | def_bool y | |
334 | prompt "Kernel support for 31 bit emulation" | |
843c48fd JG |
335 | select COMPAT_BINFMT_ELF if BINFMT_ELF |
336 | select ARCH_WANT_OLD_COMPAT_IPC | |
7eddd99c | 337 | select COMPAT_OLD_SIGACTION |
2813893f | 338 | depends on MULTIUSER |
843c48fd JG |
339 | help |
340 | Select this option if you want to enable your system kernel to | |
341 | handle system-calls from ELF binaries for 31 bit ESA. This option | |
342 | (and some other stuff like libraries and such) is needed for | |
343 | executing 31 bit applications. It is safe to say "Y". | |
344 | ||
345 | config SYSVIPC_COMPAT | |
346 | def_bool y if COMPAT && SYSVIPC | |
347 | ||
348 | config KEYS_COMPAT | |
349 | def_bool y if COMPAT && KEYS | |
350 | ||
1da177e4 | 351 | config SMP |
6f9a3c33 MS |
352 | def_bool y |
353 | prompt "Symmetric multi-processing support" | |
1da177e4 LT |
354 | ---help--- |
355 | This enables support for systems with more than one CPU. If you have | |
356 | a system with only one CPU, like most personal computers, say N. If | |
357 | you have a system with more than one CPU, say Y. | |
358 | ||
4a474157 | 359 | If you say N here, the kernel will run on uni- and multiprocessor |
1da177e4 LT |
360 | machines, but will use only one CPU of a multiprocessor machine. If |
361 | you say Y here, the kernel will run on many, but not all, | |
4a474157 | 362 | uniprocessor machines. On a uniprocessor machine, the kernel |
1da177e4 LT |
363 | will run faster if you say N here. |
364 | ||
03502faa AB |
365 | See also the SMP-HOWTO available at |
366 | <http://www.tldp.org/docs.html#howto>. | |
1da177e4 LT |
367 | |
368 | Even if you don't know what to do here, say Y. | |
369 | ||
370 | config NR_CPUS | |
5c75a0da HC |
371 | int "Maximum number of CPUs (2-512)" |
372 | range 2 512 | |
1da177e4 | 373 | depends on SMP |
5a79859a | 374 | default "64" |
1da177e4 LT |
375 | help |
376 | This allows you to specify the maximum number of CPUs which this | |
5c75a0da | 377 | kernel will support. The maximum supported value is 512 and the |
1da177e4 LT |
378 | minimum value which makes sense is 2. |
379 | ||
380 | This is purely to save memory - each supported CPU adds | |
381 | approximately sixteen kilobytes to the kernel image. | |
382 | ||
383 | config HOTPLUG_CPU | |
6f9a3c33 MS |
384 | def_bool y |
385 | prompt "Support for hot-pluggable CPUs" | |
1da177e4 | 386 | depends on SMP |
1da177e4 LT |
387 | help |
388 | Say Y here to be able to turn CPUs off and on. CPUs | |
389 | can be controlled through /sys/devices/system/cpu/cpu#. | |
390 | Say N if you want to disable CPU hotplug. | |
391 | ||
3a368f74 PH |
392 | # Some NUMA nodes have memory ranges that span |
393 | # other nodes. Even though a pfn is valid and | |
394 | # between a node's start and end pfns, it may not | |
395 | # reside on that node. See memmap_init_zone() | |
396 | # for details. <- They meant memory holes! | |
397 | config NODES_SPAN_OTHER_NODES | |
398 | def_bool NUMA | |
399 | ||
400 | config NUMA | |
401 | bool "NUMA support" | |
c095a949 | 402 | depends on SMP && SCHED_TOPOLOGY |
3a368f74 PH |
403 | default n |
404 | help | |
405 | Enable NUMA support | |
406 | ||
407 | This option adds NUMA support to the kernel. | |
408 | ||
409 | An operation mode can be selected by appending | |
410 | numa=<method> to the kernel command line. | |
411 | ||
412 | The default behaviour is identical to appending numa=plain to | |
413 | the command line. This will create just one node with all | |
414 | available memory and all CPUs in it. | |
415 | ||
416 | config NODES_SHIFT | |
417 | int "Maximum NUMA nodes (as a power of 2)" | |
418 | range 1 10 | |
419 | depends on NUMA | |
420 | default "4" | |
421 | help | |
422 | Specify the maximum number of NUMA nodes available on the target | |
423 | system. Increases memory reserved to accommodate various tables. | |
424 | ||
c29a7baf MH |
425 | menu "Select NUMA modes" |
426 | depends on NUMA | |
427 | ||
428 | config NUMA_EMU | |
429 | bool "NUMA emulation" | |
430 | default y | |
431 | help | |
432 | Numa emulation mode will split the available system memory into | |
433 | equal chunks which then are distributed over the configured number | |
434 | of nodes in a round-robin manner. | |
435 | ||
436 | The number of fake nodes is limited by the number of available memory | |
437 | chunks (i.e. memory size / fake size) and the number of supported | |
438 | nodes in the kernel. | |
439 | ||
440 | The CPUs are assigned to the nodes in a way that partially respects | |
441 | the original machine topology (if supported by the machine). | |
442 | Fair distribution of the CPUs is not guaranteed. | |
443 | ||
444 | config EMU_SIZE | |
445 | hex "NUMA emulation memory chunk size" | |
446 | default 0x10000000 | |
447 | range 0x400000 0x100000000 | |
448 | depends on NUMA_EMU | |
449 | help | |
450 | Select the default size by which the memory is chopped and then | |
451 | assigned to emulated NUMA nodes. | |
452 | ||
453 | This can be overridden by specifying | |
454 | ||
455 | emu_size=<n> | |
456 | ||
457 | on the kernel command line where also suffixes K, M, G, and T are | |
458 | supported. | |
459 | ||
460 | endmenu | |
9236b4dd HC |
461 | |
462 | config SCHED_SMT | |
463 | def_bool n | |
c29a7baf | 464 | |
8d11e021 | 465 | config SCHED_MC |
83a24e32 | 466 | def_bool n |
8d11e021 | 467 | |
4cb14bc8 | 468 | config SCHED_BOOK |
10ad34bc MS |
469 | def_bool n |
470 | ||
471 | config SCHED_TOPOLOGY | |
6f9a3c33 | 472 | def_bool y |
10ad34bc | 473 | prompt "Topology scheduler support" |
83a24e32 | 474 | depends on SMP |
10ad34bc | 475 | select SCHED_SMT |
83a24e32 | 476 | select SCHED_MC |
10ad34bc | 477 | select SCHED_BOOK |
4cb14bc8 | 478 | help |
10ad34bc MS |
479 | Topology scheduler support improves the CPU scheduler's decision |
480 | making when dealing with machines that have multi-threading, | |
481 | multiple cores or multiple books. | |
4cb14bc8 | 482 | |
843c48fd JG |
483 | source kernel/Kconfig.preempt |
484 | ||
843c48fd | 485 | source kernel/Kconfig.hz |
1da177e4 | 486 | |
843c48fd | 487 | endmenu |
1da177e4 | 488 | |
843c48fd | 489 | menu "Memory setup" |
1d057720 | 490 | |
843c48fd | 491 | config ARCH_SPARSEMEM_ENABLE |
6f9a3c33 | 492 | def_bool y |
843c48fd JG |
493 | select SPARSEMEM_VMEMMAP_ENABLE |
494 | select SPARSEMEM_VMEMMAP | |
e65e1fc2 | 495 | |
843c48fd JG |
496 | config ARCH_SPARSEMEM_DEFAULT |
497 | def_bool y | |
1da177e4 | 498 | |
843c48fd JG |
499 | config ARCH_SELECT_MEMORY_MODEL |
500 | def_bool y | |
1da177e4 | 501 | |
843c48fd JG |
502 | config ARCH_ENABLE_MEMORY_HOTPLUG |
503 | def_bool y if SPARSEMEM | |
0efa4703 | 504 | |
843c48fd JG |
505 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
506 | def_bool y | |
e37f50e1 | 507 | |
ec66ad66 MS |
508 | config ARCH_ENABLE_SPLIT_PMD_PTLOCK |
509 | def_bool y | |
ec66ad66 | 510 | |
843c48fd JG |
511 | config FORCE_MAX_ZONEORDER |
512 | int | |
513 | default "9" | |
f861e405 | 514 | |
843c48fd | 515 | source "mm/Kconfig" |
1da177e4 LT |
516 | |
517 | config PACK_STACK | |
6f9a3c33 MS |
518 | def_bool y |
519 | prompt "Pack kernel stack" | |
1da177e4 LT |
520 | help |
521 | This option enables the compiler option -mkernel-backchain if it | |
522 | is available. If the option is available the compiler supports | |
523 | the new stack layout which dramatically reduces the minimum stack | |
524 | frame size. With an old compiler a non-leaf function needs a | |
525 | minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With | |
526 | -mkernel-backchain the minimum size drops to 16 byte on 31 bit | |
527 | and 24 byte on 64 bit. | |
528 | ||
529 | Say Y if you are unsure. | |
530 | ||
1da177e4 | 531 | config CHECK_STACK |
6f9a3c33 MS |
532 | def_bool y |
533 | prompt "Detect kernel stack overflow" | |
1da177e4 LT |
534 | help |
535 | This option enables the compiler option -mstack-guard and | |
536 | -mstack-size if they are available. If the compiler supports them | |
537 | it will emit additional code to each function prolog to trigger | |
538 | an illegal operation if the kernel stack is about to overflow. | |
539 | ||
540 | Say N if you are unsure. | |
541 | ||
542 | config STACK_GUARD | |
543 | int "Size of the guard area (128-1024)" | |
544 | range 128 1024 | |
545 | depends on CHECK_STACK | |
546 | default "256" | |
547 | help | |
548 | This allows you to specify the size of the guard area at the lower | |
549 | end of the kernel stack. If the kernel stack points into the guard | |
550 | area on function entry an illegal operation is triggered. The size | |
551 | needs to be a power of 2. Please keep in mind that the size of an | |
552 | interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit. | |
553 | The minimum size for the stack guard should be 256 for 31 bit and | |
554 | 512 for 64 bit. | |
555 | ||
2c190da4 | 556 | config WARN_DYNAMIC_STACK |
6f9a3c33 | 557 | def_bool n |
2c190da4 | 558 | prompt "Emit compiler warnings for function with dynamic stack usage" |
1da177e4 | 559 | help |
2c190da4 JG |
560 | This option enables the compiler option -mwarn-dynamicstack. If the |
561 | compiler supports this options generates warnings for functions | |
562 | that dynamically allocate stack space using alloca. | |
1da177e4 LT |
563 | |
564 | Say N if you are unsure. | |
565 | ||
843c48fd | 566 | endmenu |
3f22ab27 | 567 | |
843c48fd | 568 | menu "I/O subsystem" |
1da177e4 | 569 | |
1da177e4 | 570 | config QDIO |
6f9a3c33 MS |
571 | def_tristate y |
572 | prompt "QDIO support" | |
1da177e4 | 573 | ---help--- |
8129ee16 | 574 | This driver provides the Queued Direct I/O base support for |
efca13bc | 575 | IBM System z. |
1da177e4 LT |
576 | |
577 | To compile this driver as a module, choose M here: the | |
578 | module will be called qdio. | |
579 | ||
580 | If unsure, say Y. | |
581 | ||
c8717a3d JG |
582 | menuconfig PCI |
583 | bool "PCI support" | |
90114d65 | 584 | select HAVE_DMA_ATTRS |
c8717a3d | 585 | select PCI_MSI |
8128f23c | 586 | select IOMMU_SUPPORT |
c8717a3d JG |
587 | help |
588 | Enable PCI support. | |
589 | ||
590 | if PCI | |
591 | ||
592 | config PCI_NR_FUNCTIONS | |
593 | int "Maximum number of PCI functions (1-4096)" | |
594 | range 1 4096 | |
595 | default "64" | |
596 | help | |
597 | This allows you to specify the maximum number of PCI functions which | |
598 | this kernel will support. | |
599 | ||
1f44a225 MS |
600 | config PCI_NR_MSI |
601 | int "Maximum number of MSI interrupts (64-32768)" | |
602 | range 64 32768 | |
603 | default "256" | |
604 | help | |
605 | This defines the number of virtual interrupts the kernel will | |
606 | provide for MSI interrupts. If you configure your system to have | |
607 | too few drivers will fail to allocate MSI interrupts for all | |
608 | PCI devices. | |
609 | ||
c8717a3d JG |
610 | source "drivers/pci/Kconfig" |
611 | source "drivers/pci/pcie/Kconfig" | |
612 | source "drivers/pci/hotplug/Kconfig" | |
613 | ||
614 | endif # PCI | |
615 | ||
616 | config PCI_DOMAINS | |
617 | def_bool PCI | |
618 | ||
619 | config HAS_IOMEM | |
620 | def_bool PCI | |
621 | ||
622 | config IOMMU_HELPER | |
623 | def_bool PCI | |
624 | ||
625 | config HAS_DMA | |
626 | def_bool PCI | |
627 | select HAVE_DMA_API_DEBUG | |
628 | ||
629 | config NEED_SG_DMA_LENGTH | |
630 | def_bool PCI | |
631 | ||
91630032 JG |
632 | config NEED_DMA_MAP_STATE |
633 | def_bool PCI | |
634 | ||
9d92a7e1 | 635 | config CHSC_SCH |
d9c11b1e | 636 | def_tristate m |
6f9a3c33 | 637 | prompt "Support for CHSC subchannels" |
9d92a7e1 CH |
638 | help |
639 | This driver allows usage of CHSC subchannels. A CHSC subchannel | |
640 | is usually present on LPAR only. | |
641 | The driver creates a device /dev/chsc, which may be used to | |
642 | obtain I/O configuration information about the machine and | |
643 | to issue asynchronous chsc commands (DANGEROUS). | |
644 | You will usually only want to use this interface on a special | |
645 | LPAR designated for system management. | |
646 | ||
647 | To compile this driver as a module, choose M here: the | |
648 | module will be called chsc_sch. | |
649 | ||
650 | If unsure, say N. | |
651 | ||
1d1c8f78 SO |
652 | config SCM_BUS |
653 | def_bool y | |
1d1c8f78 SO |
654 | prompt "SCM bus driver" |
655 | help | |
656 | Bus driver for Storage Class Memory. | |
657 | ||
eadb86ab SO |
658 | config EADM_SCH |
659 | def_tristate m | |
660 | prompt "Support for EADM subchannels" | |
661 | depends on SCM_BUS | |
662 | help | |
663 | This driver allows usage of EADM subchannels. EADM subchannels act | |
664 | as a communication vehicle for SCM increments. | |
665 | ||
666 | To compile this driver as a module, choose M here: the | |
667 | module will be called eadm_sch. | |
668 | ||
843c48fd JG |
669 | endmenu |
670 | ||
671 | menu "Dump support" | |
672 | ||
673 | config CRASH_DUMP | |
674 | bool "kernel crash dumps" | |
5a79859a | 675 | depends on SMP |
843c48fd JG |
676 | select KEXEC |
677 | help | |
678 | Generate crash dump after being started by kexec. | |
679 | Crash dump kernels are loaded in the main kernel with kexec-tools | |
680 | into a specially reserved region and then later executed after | |
681 | a crash by kdump/kexec. | |
843c48fd | 682 | Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this. |
bf28a597 MH |
683 | This option also enables s390 zfcpdump. |
684 | See also <file:Documentation/s390/zfcpdump.txt> | |
843c48fd JG |
685 | |
686 | endmenu | |
687 | ||
688 | menu "Executable file formats / Emulations" | |
1da177e4 | 689 | |
1da177e4 LT |
690 | source "fs/Kconfig.binfmt" |
691 | ||
843c48fd JG |
692 | config SECCOMP |
693 | def_bool y | |
694 | prompt "Enable seccomp to safely compute untrusted bytecode" | |
695 | depends on PROC_FS | |
696 | help | |
697 | This kernel feature is useful for number crunching applications | |
698 | that may need to compute untrusted bytecode during their | |
699 | execution. By using pipes or other transports made available to | |
700 | the process as file descriptors supporting the read/write | |
701 | syscalls, it's possible to isolate those applications in | |
702 | their own address space using seccomp. Once seccomp is | |
703 | enabled via /proc/<pid>/seccomp, it cannot be disabled | |
704 | and the task is only allowed to execute a few safe syscalls | |
705 | defined by each seccomp mode. | |
706 | ||
707 | If unsure, say Y. | |
708 | ||
709 | endmenu | |
710 | ||
711 | menu "Power Management" | |
712 | ||
713 | config ARCH_HIBERNATION_POSSIBLE | |
5a79859a | 714 | def_bool y |
843c48fd JG |
715 | |
716 | source "kernel/power/Kconfig" | |
717 | ||
718 | endmenu | |
719 | ||
720 | source "net/Kconfig" | |
721 | ||
722 | config PCMCIA | |
723 | def_bool n | |
724 | ||
725 | config CCW | |
726 | def_bool y | |
727 | ||
728 | source "drivers/Kconfig" | |
729 | ||
730 | source "fs/Kconfig" | |
731 | ||
732 | source "arch/s390/Kconfig.debug" | |
733 | ||
734 | source "security/Kconfig" | |
735 | ||
736 | source "crypto/Kconfig" | |
737 | ||
738 | source "lib/Kconfig" | |
739 | ||
740 | menu "Virtualization" | |
684de39b | 741 | |
1da177e4 | 742 | config PFAULT |
6f9a3c33 MS |
743 | def_bool y |
744 | prompt "Pseudo page fault support" | |
1da177e4 LT |
745 | help |
746 | Select this option, if you want to use PFAULT pseudo page fault | |
747 | handling under VM. If running native or in LPAR, this option | |
748 | has no effect. If your VM does not support PFAULT, PAGEEX | |
749 | pseudo page fault handling will be used. | |
750 | Note that VM 4.2 supports PFAULT but has a bug in its | |
751 | implementation that causes some problems. | |
752 | Everybody who wants to run Linux under VM != VM4.2 should select | |
753 | this option. | |
754 | ||
755 | config SHARED_KERNEL | |
0eccc783 HC |
756 | bool "VM shared kernel support" |
757 | depends on !JUMP_LABEL | |
1da177e4 LT |
758 | help |
759 | Select this option, if you want to share the text segment of the | |
760 | Linux kernel between different VM guests. This reduces memory | |
761 | usage with lots of guests but greatly increases kernel size. | |
9c9c1761 HC |
762 | Also if a kernel was IPL'ed from a shared segment the kexec system |
763 | call will not work. | |
1da177e4 LT |
764 | You should only select this option if you know what you are |
765 | doing and want to exploit this feature. | |
766 | ||
767 | config CMM | |
6f9a3c33 MS |
768 | def_tristate n |
769 | prompt "Cooperative memory management" | |
1da177e4 LT |
770 | help |
771 | Select this option, if you want to enable the kernel interface | |
772 | to reduce the memory size of the system. This is accomplished | |
773 | by allocating pages of memory and put them "on hold". This only | |
774 | makes sense for a system running under VM where the unused pages | |
775 | will be reused by VM for other guest systems. The interface | |
776 | allows an external monitor to balance memory of many systems. | |
777 | Everybody who wants to run Linux under VM should select this | |
778 | option. | |
779 | ||
1da177e4 | 780 | config CMM_IUCV |
6f9a3c33 MS |
781 | def_bool y |
782 | prompt "IUCV special message interface to cooperative memory management" | |
1da177e4 LT |
783 | depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV) |
784 | help | |
785 | Select this option to enable the special message interface to | |
786 | the cooperative memory management. | |
787 | ||
1da177e4 | 788 | config APPLDATA_BASE |
6f9a3c33 MS |
789 | def_bool n |
790 | prompt "Linux - VM Monitor Stream, base infrastructure" | |
c185b783 | 791 | depends on PROC_FS |
1da177e4 LT |
792 | help |
793 | This provides a kernel interface for creating and updating z/VM APPLDATA | |
794 | monitor records. The monitor records are updated at certain time | |
795 | intervals, once the timer is started. | |
796 | Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer, | |
797 | i.e. enables or disables monitoring on the Linux side. | |
798 | A custom interval value (in seconds) can be written to | |
799 | /proc/appldata/interval. | |
800 | ||
801 | Defaults are 60 seconds interval and timer off. | |
802 | The /proc entries can also be read from, showing the current settings. | |
803 | ||
804 | config APPLDATA_MEM | |
6f9a3c33 MS |
805 | def_tristate m |
806 | prompt "Monitor memory management statistics" | |
62fb2ba3 | 807 | depends on APPLDATA_BASE && VM_EVENT_COUNTERS |
1da177e4 LT |
808 | help |
809 | This provides memory management related data to the Linux - VM Monitor | |
810 | Stream, like paging/swapping rate, memory utilisation, etc. | |
811 | Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM | |
812 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
813 | on the z/VM side. | |
814 | ||
815 | Default is disabled. | |
816 | The /proc entry can also be read from, showing the current settings. | |
817 | ||
818 | This can also be compiled as a module, which will be called | |
819 | appldata_mem.o. | |
820 | ||
821 | config APPLDATA_OS | |
6f9a3c33 MS |
822 | def_tristate m |
823 | prompt "Monitor OS statistics" | |
1da177e4 LT |
824 | depends on APPLDATA_BASE |
825 | help | |
826 | This provides OS related data to the Linux - VM Monitor Stream, like | |
827 | CPU utilisation, etc. | |
828 | Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM | |
829 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
830 | on the z/VM side. | |
831 | ||
832 | Default is disabled. | |
833 | This can also be compiled as a module, which will be called | |
834 | appldata_os.o. | |
835 | ||
836 | config APPLDATA_NET_SUM | |
6f9a3c33 MS |
837 | def_tristate m |
838 | prompt "Monitor overall network statistics" | |
70193af9 | 839 | depends on APPLDATA_BASE && NET |
1da177e4 LT |
840 | help |
841 | This provides network related data to the Linux - VM Monitor Stream, | |
842 | currently there is only a total sum of network I/O statistics, no | |
843 | per-interface data. | |
844 | Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM | |
845 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
846 | on the z/VM side. | |
847 | ||
848 | Default is disabled. | |
849 | This can also be compiled as a module, which will be called | |
850 | appldata_net_sum.o. | |
851 | ||
24bbb1fa | 852 | config S390_HYPFS_FS |
6f9a3c33 MS |
853 | def_bool y |
854 | prompt "s390 hypervisor file system support" | |
24bbb1fa | 855 | select SYS_HYPERVISOR |
24bbb1fa MH |
856 | help |
857 | This is a virtual file system intended to provide accounting | |
858 | information in an s390 hypervisor environment. | |
859 | ||
843c48fd | 860 | source "arch/s390/kvm/Kconfig" |
411ed322 | 861 | |
fa587743 | 862 | config S390_GUEST |
6f9a3c33 | 863 | def_bool y |
510cf5a6 | 864 | prompt "s390 support for virtio devices" |
79b6f7fb | 865 | select TTY |
80629b0b | 866 | select VIRTUALIZATION |
fa587743 | 867 | select VIRTIO |
faeba830 | 868 | select VIRTIO_CONSOLE |
fa587743 | 869 | help |
bdd1fc27 CH |
870 | Enabling this option adds support for virtio based paravirtual device |
871 | drivers on s390. | |
1da177e4 | 872 | |
20766c08 | 873 | Select this option if you want to run the kernel as a guest under |
bdd1fc27 | 874 | the KVM hypervisor. |
155af2f9 HJP |
875 | |
876 | endmenu |