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 | |
1da177e4 LT |
13 | config RWSEM_GENERIC_SPINLOCK |
14 | bool | |
15 | ||
16 | config RWSEM_XCHGADD_ALGORITHM | |
61d48c2c | 17 | def_bool y |
1da177e4 | 18 | |
f0d1b0b3 | 19 | config ARCH_HAS_ILOG2_U32 |
6f9a3c33 | 20 | def_bool n |
f0d1b0b3 DH |
21 | |
22 | config ARCH_HAS_ILOG2_U64 | |
6f9a3c33 | 23 | def_bool n |
f0d1b0b3 | 24 | |
7e33db4e | 25 | config GENERIC_HWEIGHT |
61d48c2c | 26 | def_bool y |
7e33db4e | 27 | |
c0007f1a | 28 | config GENERIC_BUG |
6f9a3c33 | 29 | def_bool y if BUG |
c0007f1a | 30 | |
52499f40 HC |
31 | config GENERIC_BUG_RELATIVE_POINTERS |
32 | def_bool y | |
33 | ||
eca577ef | 34 | config ARCH_DMA_ADDR_T_64BIT |
5a79859a | 35 | def_bool y |
eca577ef | 36 | |
b6b40c53 | 37 | config GENERIC_LOCKBREAK |
6f9a3c33 | 38 | def_bool y if SMP && PREEMPT |
b6b40c53 | 39 | |
402b0862 | 40 | config PGSTE |
6f9a3c33 | 41 | def_bool y if KVM |
402b0862 | 42 | |
6a11f75b AM |
43 | config ARCH_SUPPORTS_DEBUG_PAGEALLOC |
44 | def_bool y | |
45 | ||
843c48fd JG |
46 | config KEXEC |
47 | def_bool y | |
2965faa5 | 48 | select KEXEC_CORE |
843c48fd JG |
49 | |
50 | config AUDIT_ARCH | |
51 | def_bool y | |
52 | ||
ce816fa8 | 53 | config NO_IOPORT_MAP |
c8717a3d JG |
54 | def_bool y |
55 | ||
56 | config PCI_QUIRKS | |
57 | def_bool n | |
58 | ||
2a0a5b22 | 59 | config ARCH_SUPPORTS_UPROBES |
5a79859a | 60 | def_bool y |
2a0a5b22 | 61 | |
347a8dc3 | 62 | config S390 |
61d48c2c | 63 | def_bool y |
0e0d04a8 | 64 | select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE |
93bead43 | 65 | select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS |
21266be9 | 66 | select ARCH_HAS_DEVMEM_IS_ALLOWED |
2b68f6ca | 67 | select ARCH_HAS_ELF_RANDOMIZE |
957e3fac | 68 | select ARCH_HAS_GCOV_PROFILE_ALL |
47523c98 | 69 | select ARCH_HAS_SG_CHAIN |
0e0d04a8 | 70 | select ARCH_HAVE_NMI_SAFE_CMPXCHG |
6beb0009 TG |
71 | select ARCH_INLINE_READ_LOCK |
72 | select ARCH_INLINE_READ_LOCK_BH | |
73 | select ARCH_INLINE_READ_LOCK_IRQ | |
74 | select ARCH_INLINE_READ_LOCK_IRQSAVE | |
0e0d04a8 | 75 | select ARCH_INLINE_READ_TRYLOCK |
6beb0009 TG |
76 | select ARCH_INLINE_READ_UNLOCK |
77 | select ARCH_INLINE_READ_UNLOCK_BH | |
78 | select ARCH_INLINE_READ_UNLOCK_IRQ | |
79 | select ARCH_INLINE_READ_UNLOCK_IRQRESTORE | |
0e0d04a8 HC |
80 | select ARCH_INLINE_SPIN_LOCK |
81 | select ARCH_INLINE_SPIN_LOCK_BH | |
82 | select ARCH_INLINE_SPIN_LOCK_IRQ | |
83 | select ARCH_INLINE_SPIN_LOCK_IRQSAVE | |
84 | select ARCH_INLINE_SPIN_TRYLOCK | |
85 | select ARCH_INLINE_SPIN_TRYLOCK_BH | |
86 | select ARCH_INLINE_SPIN_UNLOCK | |
87 | select ARCH_INLINE_SPIN_UNLOCK_BH | |
88 | select ARCH_INLINE_SPIN_UNLOCK_IRQ | |
89 | select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE | |
6beb0009 TG |
90 | select ARCH_INLINE_WRITE_LOCK |
91 | select ARCH_INLINE_WRITE_LOCK_BH | |
92 | select ARCH_INLINE_WRITE_LOCK_IRQ | |
93 | select ARCH_INLINE_WRITE_LOCK_IRQSAVE | |
0e0d04a8 | 94 | select ARCH_INLINE_WRITE_TRYLOCK |
6beb0009 TG |
95 | select ARCH_INLINE_WRITE_UNLOCK |
96 | select ARCH_INLINE_WRITE_UNLOCK_BH | |
97 | select ARCH_INLINE_WRITE_UNLOCK_IRQ | |
98 | select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE | |
0e0d04a8 | 99 | select ARCH_SAVE_PAGE_KEYS if HIBERNATION |
36e7fdaa | 100 | select ARCH_SUPPORTS_ATOMIC_RMW |
a763bc8b | 101 | select ARCH_SUPPORTS_NUMA_BALANCING |
295d8fa9 | 102 | select ARCH_USE_BUILTIN_BSWAP |
efc1d23b | 103 | select ARCH_USE_CMPXCHG_LOCKREF |
a763bc8b | 104 | select ARCH_WANTS_PROT_NUMA_PROT_NONE |
c1d7e01d | 105 | select ARCH_WANT_IPC_PARSE_VERSION |
0e0d04a8 HC |
106 | select BUILDTIME_EXTABLE_SORT |
107 | select CLONE_BACKWARDS2 | |
5d6a0163 | 108 | select DYNAMIC_FTRACE if FUNCTION_TRACER |
0e0d04a8 | 109 | select GENERIC_CLOCKEVENTS |
8f00b3e2 | 110 | select GENERIC_CPU_AUTOPROBE |
0e0d04a8 | 111 | select GENERIC_CPU_DEVICES if !SMP |
746479cd | 112 | select GENERIC_FIND_FIRST_BIT |
e80e7813 | 113 | select GENERIC_SMP_IDLE_THREAD |
79c74ecb | 114 | select GENERIC_TIME_VSYSCALL |
0e0d04a8 | 115 | select HAVE_ALIGNED_STRUCT_PAGE if SLUB |
7a017721 | 116 | select HAVE_ARCH_AUDITSYSCALL |
a763bc8b | 117 | select HAVE_ARCH_EARLY_PFN_TO_NID |
5a79859a | 118 | select HAVE_ARCH_JUMP_LABEL |
c63cb468 | 119 | select HAVE_ARCH_SECCOMP_FILTER |
5614dd92 | 120 | select HAVE_ARCH_SOFT_DIRTY |
0e0d04a8 | 121 | select HAVE_ARCH_TRACEHOOK |
5a79859a | 122 | select HAVE_ARCH_TRANSPARENT_HUGEPAGE |
77a87f0c | 123 | select HAVE_BPF_JIT if PACK_STACK && HAVE_MARCH_Z196_FEATURES |
0e0d04a8 HC |
124 | select HAVE_CMPXCHG_DOUBLE |
125 | select HAVE_CMPXCHG_LOCAL | |
0e0d04a8 | 126 | select HAVE_DEBUG_KMEMLEAK |
5a79859a HC |
127 | select HAVE_DYNAMIC_FTRACE |
128 | select HAVE_DYNAMIC_FTRACE_WITH_REGS | |
0e0d04a8 | 129 | select HAVE_FTRACE_MCOUNT_RECORD |
5a79859a HC |
130 | select HAVE_FUNCTION_GRAPH_TRACER |
131 | select HAVE_FUNCTION_TRACER | |
03b8c7b6 | 132 | select HAVE_FUTEX_CMPXCHG if FUTEX |
0e0d04a8 HC |
133 | select HAVE_KERNEL_BZIP2 |
134 | select HAVE_KERNEL_GZIP | |
8e2872ce | 135 | select HAVE_KERNEL_LZ4 |
0e0d04a8 HC |
136 | select HAVE_KERNEL_LZMA |
137 | select HAVE_KERNEL_LZO | |
138 | select HAVE_KERNEL_XZ | |
139 | select HAVE_KPROBES | |
140 | select HAVE_KRETPROBES | |
5a79859a | 141 | select HAVE_KVM |
21042d43 | 142 | select HAVE_LIVEPATCH |
0e0d04a8 HC |
143 | select HAVE_MEMBLOCK |
144 | select HAVE_MEMBLOCK_NODE_MAP | |
50be6345 | 145 | select HAVE_MEMBLOCK_PHYS_MAP |
786d35d4 | 146 | select HAVE_MOD_ARCH_SPECIFIC |
0e0d04a8 HC |
147 | select HAVE_OPROFILE |
148 | select HAVE_PERF_EVENTS | |
149 | select HAVE_REGS_AND_STACK_ACCESS_API | |
150 | select HAVE_SYSCALL_TRACEPOINTS | |
0e0d04a8 | 151 | select HAVE_VIRT_CPU_ACCOUNTING |
786d35d4 | 152 | select MODULES_USE_ELF_RELA |
50be6345 | 153 | select NO_BOOTMEM |
7eddd99c | 154 | select OLD_SIGACTION |
93bead43 | 155 | select OLD_SIGSUSPEND3 |
0e0d04a8 | 156 | select SYSCTL_EXCEPTION_TRACE |
0563416b | 157 | select TTY |
0e0d04a8 | 158 | select VIRT_CPU_ACCOUNTING |
93bead43 | 159 | select VIRT_TO_BUS |
3a368f74 | 160 | |
1da177e4 | 161 | |
fca3e357 | 162 | config SCHED_OMIT_FRAME_POINTER |
6f9a3c33 | 163 | def_bool y |
fca3e357 | 164 | |
c81956c9 KS |
165 | config PGTABLE_LEVELS |
166 | int | |
c095a949 | 167 | default 4 |
c81956c9 | 168 | |
1da177e4 LT |
169 | source "init/Kconfig" |
170 | ||
dc52ddc0 MH |
171 | source "kernel/Kconfig.freezer" |
172 | ||
21042d43 JS |
173 | source "kernel/livepatch/Kconfig" |
174 | ||
843c48fd JG |
175 | menu "Processor type and features" |
176 | ||
177 | config HAVE_MARCH_Z900_FEATURES | |
178 | def_bool n | |
179 | ||
180 | config HAVE_MARCH_Z990_FEATURES | |
181 | def_bool n | |
182 | select HAVE_MARCH_Z900_FEATURES | |
183 | ||
184 | config HAVE_MARCH_Z9_109_FEATURES | |
185 | def_bool n | |
186 | select HAVE_MARCH_Z990_FEATURES | |
187 | ||
188 | config HAVE_MARCH_Z10_FEATURES | |
189 | def_bool n | |
190 | select HAVE_MARCH_Z9_109_FEATURES | |
191 | ||
192 | config HAVE_MARCH_Z196_FEATURES | |
193 | def_bool n | |
194 | select HAVE_MARCH_Z10_FEATURES | |
195 | ||
991c1505 HC |
196 | config HAVE_MARCH_ZEC12_FEATURES |
197 | def_bool n | |
198 | select HAVE_MARCH_Z196_FEATURES | |
199 | ||
f8b2dcbd MS |
200 | config HAVE_MARCH_Z13_FEATURES |
201 | def_bool n | |
202 | select HAVE_MARCH_ZEC12_FEATURES | |
203 | ||
843c48fd JG |
204 | choice |
205 | prompt "Processor type" | |
5a79859a | 206 | default MARCH_Z900 |
1da177e4 | 207 | |
843c48fd JG |
208 | config MARCH_Z900 |
209 | bool "IBM zSeries model z800 and z900" | |
5a79859a | 210 | select HAVE_MARCH_Z900_FEATURES |
843c48fd JG |
211 | help |
212 | Select this to enable optimizations for model z800/z900 (2064 and | |
213 | 2066 series). This will enable some optimizations that are not | |
214 | available on older ESA/390 (31 Bit) only CPUs. | |
215 | ||
216 | config MARCH_Z990 | |
217 | bool "IBM zSeries model z890 and z990" | |
5a79859a | 218 | select HAVE_MARCH_Z990_FEATURES |
843c48fd JG |
219 | help |
220 | Select this to enable optimizations for model z890/z990 (2084 and | |
221 | 2086 series). The kernel will be slightly faster but will not work | |
222 | on older machines. | |
223 | ||
224 | config MARCH_Z9_109 | |
225 | bool "IBM System z9" | |
5a79859a | 226 | select HAVE_MARCH_Z9_109_FEATURES |
843c48fd JG |
227 | help |
228 | Select this to enable optimizations for IBM System z9 (2094 and | |
229 | 2096 series). The kernel will be slightly faster but will not work | |
230 | on older machines. | |
231 | ||
232 | config MARCH_Z10 | |
233 | bool "IBM System z10" | |
5a79859a | 234 | select HAVE_MARCH_Z10_FEATURES |
843c48fd JG |
235 | help |
236 | Select this to enable optimizations for IBM System z10 (2097 and | |
237 | 2098 series). The kernel will be slightly faster but will not work | |
238 | on older machines. | |
239 | ||
240 | config MARCH_Z196 | |
241 | bool "IBM zEnterprise 114 and 196" | |
5a79859a | 242 | select HAVE_MARCH_Z196_FEATURES |
843c48fd JG |
243 | help |
244 | Select this to enable optimizations for IBM zEnterprise 114 and 196 | |
245 | (2818 and 2817 series). The kernel will be slightly faster but will | |
246 | not work on older machines. | |
1da177e4 | 247 | |
991c1505 | 248 | config MARCH_ZEC12 |
59471227 | 249 | bool "IBM zBC12 and zEC12" |
5a79859a | 250 | select HAVE_MARCH_ZEC12_FEATURES |
991c1505 | 251 | help |
59471227 HC |
252 | Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and |
253 | 2827 series). The kernel will be slightly faster but will not work on | |
254 | older machines. | |
991c1505 | 255 | |
f8b2dcbd MS |
256 | config MARCH_Z13 |
257 | bool "IBM z13" | |
5a79859a | 258 | select HAVE_MARCH_Z13_FEATURES |
f8b2dcbd MS |
259 | help |
260 | Select this to enable optimizations for IBM z13 (2964 series). | |
261 | The kernel will be slightly faster but will not work on older | |
262 | machines. | |
263 | ||
843c48fd | 264 | endchoice |
1da177e4 | 265 | |
1db9e051 HC |
266 | config MARCH_Z900_TUNE |
267 | def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT | |
268 | ||
269 | config MARCH_Z990_TUNE | |
270 | def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT | |
271 | ||
272 | config MARCH_Z9_109_TUNE | |
273 | def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT | |
274 | ||
275 | config MARCH_Z10_TUNE | |
276 | def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT | |
277 | ||
278 | config MARCH_Z196_TUNE | |
279 | def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT | |
280 | ||
281 | config MARCH_ZEC12_TUNE | |
282 | def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT | |
283 | ||
f8b2dcbd MS |
284 | config MARCH_Z13_TUNE |
285 | def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT | |
286 | ||
1db9e051 HC |
287 | choice |
288 | prompt "Tune code generation" | |
289 | default TUNE_DEFAULT | |
290 | help | |
291 | Cause the compiler to tune (-mtune) the generated code for a machine. | |
292 | This will make the code run faster on the selected machine but | |
293 | somewhat slower on other machines. | |
294 | This option only changes how the compiler emits instructions, not the | |
295 | selection of instructions itself, so the resulting kernel will run on | |
296 | all other machines. | |
297 | ||
298 | config TUNE_DEFAULT | |
299 | bool "Default" | |
300 | help | |
301 | Tune the generated code for the target processor for which the kernel | |
302 | will be compiled. | |
303 | ||
1db9e051 HC |
304 | config TUNE_Z900 |
305 | bool "IBM zSeries model z800 and z900" | |
306 | ||
307 | config TUNE_Z990 | |
308 | bool "IBM zSeries model z890 and z990" | |
309 | ||
310 | config TUNE_Z9_109 | |
311 | bool "IBM System z9" | |
312 | ||
313 | config TUNE_Z10 | |
314 | bool "IBM System z10" | |
315 | ||
316 | config TUNE_Z196 | |
317 | bool "IBM zEnterprise 114 and 196" | |
318 | ||
319 | config TUNE_ZEC12 | |
320 | bool "IBM zBC12 and zEC12" | |
321 | ||
f8b2dcbd MS |
322 | config TUNE_Z13 |
323 | bool "IBM z13" | |
324 | ||
1db9e051 HC |
325 | endchoice |
326 | ||
347a8dc3 | 327 | config 64BIT |
6f9a3c33 | 328 | def_bool y |
d9f7a745 | 329 | |
843c48fd JG |
330 | config COMPAT |
331 | def_bool y | |
332 | prompt "Kernel support for 31 bit emulation" | |
843c48fd JG |
333 | select COMPAT_BINFMT_ELF if BINFMT_ELF |
334 | select ARCH_WANT_OLD_COMPAT_IPC | |
7eddd99c | 335 | select COMPAT_OLD_SIGACTION |
2813893f | 336 | depends on MULTIUSER |
843c48fd JG |
337 | help |
338 | Select this option if you want to enable your system kernel to | |
339 | handle system-calls from ELF binaries for 31 bit ESA. This option | |
340 | (and some other stuff like libraries and such) is needed for | |
341 | executing 31 bit applications. It is safe to say "Y". | |
342 | ||
343 | config SYSVIPC_COMPAT | |
344 | def_bool y if COMPAT && SYSVIPC | |
345 | ||
346 | config KEYS_COMPAT | |
347 | def_bool y if COMPAT && KEYS | |
348 | ||
1da177e4 | 349 | config SMP |
6f9a3c33 MS |
350 | def_bool y |
351 | prompt "Symmetric multi-processing support" | |
1da177e4 LT |
352 | ---help--- |
353 | This enables support for systems with more than one CPU. If you have | |
354 | a system with only one CPU, like most personal computers, say N. If | |
355 | you have a system with more than one CPU, say Y. | |
356 | ||
4a474157 | 357 | If you say N here, the kernel will run on uni- and multiprocessor |
1da177e4 LT |
358 | machines, but will use only one CPU of a multiprocessor machine. If |
359 | you say Y here, the kernel will run on many, but not all, | |
4a474157 | 360 | uniprocessor machines. On a uniprocessor machine, the kernel |
1da177e4 LT |
361 | will run faster if you say N here. |
362 | ||
03502faa AB |
363 | See also the SMP-HOWTO available at |
364 | <http://www.tldp.org/docs.html#howto>. | |
1da177e4 LT |
365 | |
366 | Even if you don't know what to do here, say Y. | |
367 | ||
368 | config NR_CPUS | |
5c75a0da HC |
369 | int "Maximum number of CPUs (2-512)" |
370 | range 2 512 | |
1da177e4 | 371 | depends on SMP |
5a79859a | 372 | default "64" |
1da177e4 LT |
373 | help |
374 | This allows you to specify the maximum number of CPUs which this | |
5c75a0da | 375 | kernel will support. The maximum supported value is 512 and the |
1da177e4 LT |
376 | minimum value which makes sense is 2. |
377 | ||
378 | This is purely to save memory - each supported CPU adds | |
379 | approximately sixteen kilobytes to the kernel image. | |
380 | ||
381 | config HOTPLUG_CPU | |
6f9a3c33 MS |
382 | def_bool y |
383 | prompt "Support for hot-pluggable CPUs" | |
1da177e4 | 384 | depends on SMP |
1da177e4 LT |
385 | help |
386 | Say Y here to be able to turn CPUs off and on. CPUs | |
387 | can be controlled through /sys/devices/system/cpu/cpu#. | |
388 | Say N if you want to disable CPU hotplug. | |
389 | ||
3a368f74 PH |
390 | # Some NUMA nodes have memory ranges that span |
391 | # other nodes. Even though a pfn is valid and | |
392 | # between a node's start and end pfns, it may not | |
393 | # reside on that node. See memmap_init_zone() | |
394 | # for details. <- They meant memory holes! | |
395 | config NODES_SPAN_OTHER_NODES | |
396 | def_bool NUMA | |
397 | ||
398 | config NUMA | |
399 | bool "NUMA support" | |
c095a949 | 400 | depends on SMP && SCHED_TOPOLOGY |
3a368f74 PH |
401 | default n |
402 | help | |
403 | Enable NUMA support | |
404 | ||
405 | This option adds NUMA support to the kernel. | |
406 | ||
407 | An operation mode can be selected by appending | |
408 | numa=<method> to the kernel command line. | |
409 | ||
410 | The default behaviour is identical to appending numa=plain to | |
411 | the command line. This will create just one node with all | |
412 | available memory and all CPUs in it. | |
413 | ||
414 | config NODES_SHIFT | |
415 | int "Maximum NUMA nodes (as a power of 2)" | |
416 | range 1 10 | |
417 | depends on NUMA | |
418 | default "4" | |
419 | help | |
420 | Specify the maximum number of NUMA nodes available on the target | |
421 | system. Increases memory reserved to accommodate various tables. | |
422 | ||
c29a7baf MH |
423 | menu "Select NUMA modes" |
424 | depends on NUMA | |
425 | ||
426 | config NUMA_EMU | |
427 | bool "NUMA emulation" | |
428 | default y | |
429 | help | |
430 | Numa emulation mode will split the available system memory into | |
431 | equal chunks which then are distributed over the configured number | |
432 | of nodes in a round-robin manner. | |
433 | ||
434 | The number of fake nodes is limited by the number of available memory | |
435 | chunks (i.e. memory size / fake size) and the number of supported | |
436 | nodes in the kernel. | |
437 | ||
438 | The CPUs are assigned to the nodes in a way that partially respects | |
439 | the original machine topology (if supported by the machine). | |
440 | Fair distribution of the CPUs is not guaranteed. | |
441 | ||
442 | config EMU_SIZE | |
443 | hex "NUMA emulation memory chunk size" | |
444 | default 0x10000000 | |
445 | range 0x400000 0x100000000 | |
446 | depends on NUMA_EMU | |
447 | help | |
448 | Select the default size by which the memory is chopped and then | |
449 | assigned to emulated NUMA nodes. | |
450 | ||
451 | This can be overridden by specifying | |
452 | ||
453 | emu_size=<n> | |
454 | ||
455 | on the kernel command line where also suffixes K, M, G, and T are | |
456 | supported. | |
457 | ||
458 | endmenu | |
9236b4dd HC |
459 | |
460 | config SCHED_SMT | |
461 | def_bool n | |
c29a7baf | 462 | |
8d11e021 | 463 | config SCHED_MC |
83a24e32 | 464 | def_bool n |
8d11e021 | 465 | |
4cb14bc8 | 466 | config SCHED_BOOK |
10ad34bc MS |
467 | def_bool n |
468 | ||
469 | config SCHED_TOPOLOGY | |
6f9a3c33 | 470 | def_bool y |
10ad34bc | 471 | prompt "Topology scheduler support" |
83a24e32 | 472 | depends on SMP |
10ad34bc | 473 | select SCHED_SMT |
83a24e32 | 474 | select SCHED_MC |
10ad34bc | 475 | select SCHED_BOOK |
4cb14bc8 | 476 | help |
10ad34bc MS |
477 | Topology scheduler support improves the CPU scheduler's decision |
478 | making when dealing with machines that have multi-threading, | |
479 | multiple cores or multiple books. | |
4cb14bc8 | 480 | |
843c48fd JG |
481 | source kernel/Kconfig.preempt |
482 | ||
843c48fd | 483 | source kernel/Kconfig.hz |
1da177e4 | 484 | |
843c48fd | 485 | endmenu |
1da177e4 | 486 | |
843c48fd | 487 | menu "Memory setup" |
1d057720 | 488 | |
843c48fd | 489 | config ARCH_SPARSEMEM_ENABLE |
6f9a3c33 | 490 | def_bool y |
843c48fd JG |
491 | select SPARSEMEM_VMEMMAP_ENABLE |
492 | select SPARSEMEM_VMEMMAP | |
e65e1fc2 | 493 | |
843c48fd JG |
494 | config ARCH_SPARSEMEM_DEFAULT |
495 | def_bool y | |
1da177e4 | 496 | |
843c48fd JG |
497 | config ARCH_SELECT_MEMORY_MODEL |
498 | def_bool y | |
1da177e4 | 499 | |
843c48fd JG |
500 | config ARCH_ENABLE_MEMORY_HOTPLUG |
501 | def_bool y if SPARSEMEM | |
0efa4703 | 502 | |
843c48fd JG |
503 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
504 | def_bool y | |
e37f50e1 | 505 | |
ec66ad66 MS |
506 | config ARCH_ENABLE_SPLIT_PMD_PTLOCK |
507 | def_bool y | |
ec66ad66 | 508 | |
843c48fd JG |
509 | config FORCE_MAX_ZONEORDER |
510 | int | |
511 | default "9" | |
f861e405 | 512 | |
843c48fd | 513 | source "mm/Kconfig" |
1da177e4 LT |
514 | |
515 | config PACK_STACK | |
6f9a3c33 MS |
516 | def_bool y |
517 | prompt "Pack kernel stack" | |
1da177e4 LT |
518 | help |
519 | This option enables the compiler option -mkernel-backchain if it | |
520 | is available. If the option is available the compiler supports | |
521 | the new stack layout which dramatically reduces the minimum stack | |
522 | frame size. With an old compiler a non-leaf function needs a | |
523 | minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With | |
524 | -mkernel-backchain the minimum size drops to 16 byte on 31 bit | |
525 | and 24 byte on 64 bit. | |
526 | ||
527 | Say Y if you are unsure. | |
528 | ||
1da177e4 | 529 | config CHECK_STACK |
6f9a3c33 MS |
530 | def_bool y |
531 | prompt "Detect kernel stack overflow" | |
1da177e4 LT |
532 | help |
533 | This option enables the compiler option -mstack-guard and | |
534 | -mstack-size if they are available. If the compiler supports them | |
535 | it will emit additional code to each function prolog to trigger | |
536 | an illegal operation if the kernel stack is about to overflow. | |
537 | ||
538 | Say N if you are unsure. | |
539 | ||
540 | config STACK_GUARD | |
541 | int "Size of the guard area (128-1024)" | |
542 | range 128 1024 | |
543 | depends on CHECK_STACK | |
544 | default "256" | |
545 | help | |
546 | This allows you to specify the size of the guard area at the lower | |
547 | end of the kernel stack. If the kernel stack points into the guard | |
548 | area on function entry an illegal operation is triggered. The size | |
549 | needs to be a power of 2. Please keep in mind that the size of an | |
550 | interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit. | |
551 | The minimum size for the stack guard should be 256 for 31 bit and | |
552 | 512 for 64 bit. | |
553 | ||
2c190da4 | 554 | config WARN_DYNAMIC_STACK |
6f9a3c33 | 555 | def_bool n |
2c190da4 | 556 | prompt "Emit compiler warnings for function with dynamic stack usage" |
1da177e4 | 557 | help |
2c190da4 JG |
558 | This option enables the compiler option -mwarn-dynamicstack. If the |
559 | compiler supports this options generates warnings for functions | |
560 | that dynamically allocate stack space using alloca. | |
1da177e4 LT |
561 | |
562 | Say N if you are unsure. | |
563 | ||
843c48fd | 564 | endmenu |
3f22ab27 | 565 | |
843c48fd | 566 | menu "I/O subsystem" |
1da177e4 | 567 | |
1da177e4 | 568 | config QDIO |
6f9a3c33 MS |
569 | def_tristate y |
570 | prompt "QDIO support" | |
1da177e4 | 571 | ---help--- |
8129ee16 | 572 | This driver provides the Queued Direct I/O base support for |
efca13bc | 573 | IBM System z. |
1da177e4 LT |
574 | |
575 | To compile this driver as a module, choose M here: the | |
576 | module will be called qdio. | |
577 | ||
578 | If unsure, say Y. | |
579 | ||
c8717a3d JG |
580 | menuconfig PCI |
581 | bool "PCI support" | |
c8717a3d | 582 | select PCI_MSI |
8128f23c | 583 | select IOMMU_SUPPORT |
c8717a3d JG |
584 | help |
585 | Enable PCI support. | |
586 | ||
587 | if PCI | |
588 | ||
589 | config PCI_NR_FUNCTIONS | |
590 | int "Maximum number of PCI functions (1-4096)" | |
591 | range 1 4096 | |
592 | default "64" | |
593 | help | |
594 | This allows you to specify the maximum number of PCI functions which | |
595 | this kernel will support. | |
596 | ||
1f44a225 MS |
597 | config PCI_NR_MSI |
598 | int "Maximum number of MSI interrupts (64-32768)" | |
599 | range 64 32768 | |
600 | default "256" | |
601 | help | |
602 | This defines the number of virtual interrupts the kernel will | |
603 | provide for MSI interrupts. If you configure your system to have | |
604 | too few drivers will fail to allocate MSI interrupts for all | |
605 | PCI devices. | |
606 | ||
c8717a3d JG |
607 | source "drivers/pci/Kconfig" |
608 | source "drivers/pci/pcie/Kconfig" | |
609 | source "drivers/pci/hotplug/Kconfig" | |
610 | ||
611 | endif # PCI | |
612 | ||
613 | config PCI_DOMAINS | |
614 | def_bool PCI | |
615 | ||
616 | config HAS_IOMEM | |
617 | def_bool PCI | |
618 | ||
619 | config IOMMU_HELPER | |
620 | def_bool PCI | |
621 | ||
622 | config HAS_DMA | |
623 | def_bool PCI | |
624 | select HAVE_DMA_API_DEBUG | |
625 | ||
626 | config NEED_SG_DMA_LENGTH | |
627 | def_bool PCI | |
628 | ||
91630032 JG |
629 | config NEED_DMA_MAP_STATE |
630 | def_bool PCI | |
631 | ||
9d92a7e1 | 632 | config CHSC_SCH |
d9c11b1e | 633 | def_tristate m |
6f9a3c33 | 634 | prompt "Support for CHSC subchannels" |
9d92a7e1 CH |
635 | help |
636 | This driver allows usage of CHSC subchannels. A CHSC subchannel | |
637 | is usually present on LPAR only. | |
638 | The driver creates a device /dev/chsc, which may be used to | |
639 | obtain I/O configuration information about the machine and | |
640 | to issue asynchronous chsc commands (DANGEROUS). | |
641 | You will usually only want to use this interface on a special | |
642 | LPAR designated for system management. | |
643 | ||
644 | To compile this driver as a module, choose M here: the | |
645 | module will be called chsc_sch. | |
646 | ||
647 | If unsure, say N. | |
648 | ||
1d1c8f78 SO |
649 | config SCM_BUS |
650 | def_bool y | |
1d1c8f78 SO |
651 | prompt "SCM bus driver" |
652 | help | |
653 | Bus driver for Storage Class Memory. | |
654 | ||
eadb86ab SO |
655 | config EADM_SCH |
656 | def_tristate m | |
657 | prompt "Support for EADM subchannels" | |
658 | depends on SCM_BUS | |
659 | help | |
660 | This driver allows usage of EADM subchannels. EADM subchannels act | |
661 | as a communication vehicle for SCM increments. | |
662 | ||
663 | To compile this driver as a module, choose M here: the | |
664 | module will be called eadm_sch. | |
665 | ||
843c48fd JG |
666 | endmenu |
667 | ||
668 | menu "Dump support" | |
669 | ||
670 | config CRASH_DUMP | |
671 | bool "kernel crash dumps" | |
5a79859a | 672 | depends on SMP |
843c48fd JG |
673 | select KEXEC |
674 | help | |
675 | Generate crash dump after being started by kexec. | |
676 | Crash dump kernels are loaded in the main kernel with kexec-tools | |
677 | into a specially reserved region and then later executed after | |
678 | a crash by kdump/kexec. | |
843c48fd | 679 | Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this. |
bf28a597 MH |
680 | This option also enables s390 zfcpdump. |
681 | See also <file:Documentation/s390/zfcpdump.txt> | |
843c48fd JG |
682 | |
683 | endmenu | |
684 | ||
685 | menu "Executable file formats / Emulations" | |
1da177e4 | 686 | |
1da177e4 LT |
687 | source "fs/Kconfig.binfmt" |
688 | ||
843c48fd JG |
689 | config SECCOMP |
690 | def_bool y | |
691 | prompt "Enable seccomp to safely compute untrusted bytecode" | |
692 | depends on PROC_FS | |
693 | help | |
694 | This kernel feature is useful for number crunching applications | |
695 | that may need to compute untrusted bytecode during their | |
696 | execution. By using pipes or other transports made available to | |
697 | the process as file descriptors supporting the read/write | |
698 | syscalls, it's possible to isolate those applications in | |
699 | their own address space using seccomp. Once seccomp is | |
700 | enabled via /proc/<pid>/seccomp, it cannot be disabled | |
701 | and the task is only allowed to execute a few safe syscalls | |
702 | defined by each seccomp mode. | |
703 | ||
704 | If unsure, say Y. | |
705 | ||
706 | endmenu | |
707 | ||
708 | menu "Power Management" | |
709 | ||
710 | config ARCH_HIBERNATION_POSSIBLE | |
5a79859a | 711 | def_bool y |
843c48fd JG |
712 | |
713 | source "kernel/power/Kconfig" | |
714 | ||
715 | endmenu | |
716 | ||
717 | source "net/Kconfig" | |
718 | ||
719 | config PCMCIA | |
720 | def_bool n | |
721 | ||
722 | config CCW | |
723 | def_bool y | |
724 | ||
725 | source "drivers/Kconfig" | |
726 | ||
727 | source "fs/Kconfig" | |
728 | ||
729 | source "arch/s390/Kconfig.debug" | |
730 | ||
731 | source "security/Kconfig" | |
732 | ||
733 | source "crypto/Kconfig" | |
734 | ||
735 | source "lib/Kconfig" | |
736 | ||
737 | menu "Virtualization" | |
684de39b | 738 | |
1da177e4 | 739 | config PFAULT |
6f9a3c33 MS |
740 | def_bool y |
741 | prompt "Pseudo page fault support" | |
1da177e4 LT |
742 | help |
743 | Select this option, if you want to use PFAULT pseudo page fault | |
744 | handling under VM. If running native or in LPAR, this option | |
745 | has no effect. If your VM does not support PFAULT, PAGEEX | |
746 | pseudo page fault handling will be used. | |
747 | Note that VM 4.2 supports PFAULT but has a bug in its | |
748 | implementation that causes some problems. | |
749 | Everybody who wants to run Linux under VM != VM4.2 should select | |
750 | this option. | |
751 | ||
752 | config SHARED_KERNEL | |
0eccc783 HC |
753 | bool "VM shared kernel support" |
754 | depends on !JUMP_LABEL | |
1da177e4 LT |
755 | help |
756 | Select this option, if you want to share the text segment of the | |
757 | Linux kernel between different VM guests. This reduces memory | |
758 | usage with lots of guests but greatly increases kernel size. | |
9c9c1761 HC |
759 | Also if a kernel was IPL'ed from a shared segment the kexec system |
760 | call will not work. | |
1da177e4 LT |
761 | You should only select this option if you know what you are |
762 | doing and want to exploit this feature. | |
763 | ||
764 | config CMM | |
6f9a3c33 MS |
765 | def_tristate n |
766 | prompt "Cooperative memory management" | |
1da177e4 LT |
767 | help |
768 | Select this option, if you want to enable the kernel interface | |
769 | to reduce the memory size of the system. This is accomplished | |
770 | by allocating pages of memory and put them "on hold". This only | |
771 | makes sense for a system running under VM where the unused pages | |
772 | will be reused by VM for other guest systems. The interface | |
773 | allows an external monitor to balance memory of many systems. | |
774 | Everybody who wants to run Linux under VM should select this | |
775 | option. | |
776 | ||
1da177e4 | 777 | config CMM_IUCV |
6f9a3c33 MS |
778 | def_bool y |
779 | prompt "IUCV special message interface to cooperative memory management" | |
1da177e4 LT |
780 | depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV) |
781 | help | |
782 | Select this option to enable the special message interface to | |
783 | the cooperative memory management. | |
784 | ||
1da177e4 | 785 | config APPLDATA_BASE |
6f9a3c33 MS |
786 | def_bool n |
787 | prompt "Linux - VM Monitor Stream, base infrastructure" | |
c185b783 | 788 | depends on PROC_FS |
1da177e4 LT |
789 | help |
790 | This provides a kernel interface for creating and updating z/VM APPLDATA | |
791 | monitor records. The monitor records are updated at certain time | |
792 | intervals, once the timer is started. | |
793 | Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer, | |
794 | i.e. enables or disables monitoring on the Linux side. | |
795 | A custom interval value (in seconds) can be written to | |
796 | /proc/appldata/interval. | |
797 | ||
798 | Defaults are 60 seconds interval and timer off. | |
799 | The /proc entries can also be read from, showing the current settings. | |
800 | ||
801 | config APPLDATA_MEM | |
6f9a3c33 MS |
802 | def_tristate m |
803 | prompt "Monitor memory management statistics" | |
62fb2ba3 | 804 | depends on APPLDATA_BASE && VM_EVENT_COUNTERS |
1da177e4 LT |
805 | help |
806 | This provides memory management related data to the Linux - VM Monitor | |
807 | Stream, like paging/swapping rate, memory utilisation, etc. | |
808 | Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM | |
809 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
810 | on the z/VM side. | |
811 | ||
812 | Default is disabled. | |
813 | The /proc entry can also be read from, showing the current settings. | |
814 | ||
815 | This can also be compiled as a module, which will be called | |
816 | appldata_mem.o. | |
817 | ||
818 | config APPLDATA_OS | |
6f9a3c33 MS |
819 | def_tristate m |
820 | prompt "Monitor OS statistics" | |
1da177e4 LT |
821 | depends on APPLDATA_BASE |
822 | help | |
823 | This provides OS related data to the Linux - VM Monitor Stream, like | |
824 | CPU utilisation, etc. | |
825 | Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM | |
826 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
827 | on the z/VM side. | |
828 | ||
829 | Default is disabled. | |
830 | This can also be compiled as a module, which will be called | |
831 | appldata_os.o. | |
832 | ||
833 | config APPLDATA_NET_SUM | |
6f9a3c33 MS |
834 | def_tristate m |
835 | prompt "Monitor overall network statistics" | |
70193af9 | 836 | depends on APPLDATA_BASE && NET |
1da177e4 LT |
837 | help |
838 | This provides network related data to the Linux - VM Monitor Stream, | |
839 | currently there is only a total sum of network I/O statistics, no | |
840 | per-interface data. | |
841 | Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM | |
842 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
843 | on the z/VM side. | |
844 | ||
845 | Default is disabled. | |
846 | This can also be compiled as a module, which will be called | |
847 | appldata_net_sum.o. | |
848 | ||
24bbb1fa | 849 | config S390_HYPFS_FS |
6f9a3c33 MS |
850 | def_bool y |
851 | prompt "s390 hypervisor file system support" | |
24bbb1fa | 852 | select SYS_HYPERVISOR |
24bbb1fa MH |
853 | help |
854 | This is a virtual file system intended to provide accounting | |
855 | information in an s390 hypervisor environment. | |
856 | ||
843c48fd | 857 | source "arch/s390/kvm/Kconfig" |
411ed322 | 858 | |
fa587743 | 859 | config S390_GUEST |
6f9a3c33 | 860 | def_bool y |
510cf5a6 | 861 | prompt "s390 support for virtio devices" |
79b6f7fb | 862 | select TTY |
80629b0b | 863 | select VIRTUALIZATION |
fa587743 | 864 | select VIRTIO |
faeba830 | 865 | select VIRTIO_CONSOLE |
fa587743 | 866 | help |
bdd1fc27 CH |
867 | Enabling this option adds support for virtio based paravirtual device |
868 | drivers on s390. | |
1da177e4 | 869 | |
20766c08 | 870 | Select this option if you want to run the kernel as a guest under |
bdd1fc27 | 871 | the KVM hypervisor. |
155af2f9 HJP |
872 | |
873 | endmenu |