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