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 | ||
23db764d | 37 | config NO_IOMEM |
5ea81769 AV |
38 | def_bool y |
39 | ||
411f0f3e HC |
40 | config NO_DMA |
41 | def_bool y | |
42 | ||
eca577ef FT |
43 | config ARCH_DMA_ADDR_T_64BIT |
44 | def_bool 64BIT | |
45 | ||
b6b40c53 | 46 | config GENERIC_LOCKBREAK |
6f9a3c33 | 47 | def_bool y if SMP && PREEMPT |
b6b40c53 | 48 | |
402b0862 | 49 | config PGSTE |
6f9a3c33 | 50 | def_bool y if KVM |
402b0862 | 51 | |
6a11f75b AM |
52 | config ARCH_SUPPORTS_DEBUG_PAGEALLOC |
53 | def_bool y | |
54 | ||
843c48fd JG |
55 | config KEXEC |
56 | def_bool y | |
57 | ||
58 | config AUDIT_ARCH | |
59 | def_bool y | |
60 | ||
347a8dc3 | 61 | config S390 |
61d48c2c | 62 | def_bool y |
ca9fc75a | 63 | select USE_GENERIC_SMP_HELPERS if SMP |
5d3b56f9 | 64 | select GENERIC_CPU_DEVICES if !SMP |
ed6bb619 | 65 | select HAVE_SYSCALL_WRAPPERS |
5d360a75 | 66 | select HAVE_FUNCTION_TRACER |
8b4488f8 | 67 | select HAVE_FUNCTION_TRACE_MCOUNT_TEST |
dfd9f7ab | 68 | select HAVE_FTRACE_MCOUNT_RECORD |
b25c477b | 69 | select HAVE_C_RECORDMCOUNT |
66700001 | 70 | select HAVE_SYSCALL_TRACEPOINTS |
7ac57a89 | 71 | select SYSCTL_EXCEPTION_TRACE |
dfd9f7ab | 72 | select HAVE_DYNAMIC_FTRACE |
88dbd203 | 73 | select HAVE_FUNCTION_GRAPH_TRACER |
952974ac | 74 | select HAVE_REGS_AND_STACK_ACCESS_API |
42d4b839 | 75 | select HAVE_OPROFILE |
3f550096 | 76 | select HAVE_KPROBES |
9edddaa2 | 77 | select HAVE_KRETPROBES |
77b455f1 | 78 | select HAVE_KVM if 64BIT |
753c4dd6 | 79 | select HAVE_ARCH_TRACEHOOK |
98a79d6a | 80 | select INIT_ALL_POSSIBLE |
e360adbe | 81 | select HAVE_IRQ_WORK |
cdd6c482 | 82 | select HAVE_PERF_EVENTS |
df013ffb | 83 | select ARCH_HAVE_NMI_SAFE_CMPXCHG |
b69ec42b | 84 | select HAVE_DEBUG_KMEMLEAK |
1844c9bc MS |
85 | select HAVE_KERNEL_GZIP |
86 | select HAVE_KERNEL_BZIP2 | |
87 | select HAVE_KERNEL_LZMA | |
cdf56649 | 88 | select HAVE_KERNEL_LZO |
d7b081ac | 89 | select HAVE_KERNEL_XZ |
34b133f8 | 90 | select HAVE_ARCH_MUTEX_CPU_RELAX |
5373db88 | 91 | select HAVE_ARCH_JUMP_LABEL if !MARCH_G5 |
c10302ef | 92 | select HAVE_BPF_JIT if 64BIT && PACK_STACK |
85055dd8 | 93 | select ARCH_SAVE_PAGE_KEYS if HIBERNATION |
7463449b | 94 | select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE |
ff38df37 TH |
95 | select HAVE_MEMBLOCK |
96 | select HAVE_MEMBLOCK_NODE_MAP | |
2e30db95 | 97 | select HAVE_CMPXCHG_LOCAL |
b1d6b40c | 98 | select HAVE_CMPXCHG_DOUBLE |
4bffbb34 | 99 | select HAVE_ALIGNED_STRUCT_PAGE if SLUB |
b952741c FW |
100 | select HAVE_VIRT_CPU_ACCOUNTING |
101 | select VIRT_CPU_ACCOUNTING | |
ff38df37 | 102 | select ARCH_DISCARD_MEMBLOCK |
3193a98d | 103 | select BUILDTIME_EXTABLE_SORT |
6beb0009 TG |
104 | select ARCH_INLINE_SPIN_TRYLOCK |
105 | select ARCH_INLINE_SPIN_TRYLOCK_BH | |
106 | select ARCH_INLINE_SPIN_LOCK | |
107 | select ARCH_INLINE_SPIN_LOCK_BH | |
108 | select ARCH_INLINE_SPIN_LOCK_IRQ | |
109 | select ARCH_INLINE_SPIN_LOCK_IRQSAVE | |
110 | select ARCH_INLINE_SPIN_UNLOCK | |
111 | select ARCH_INLINE_SPIN_UNLOCK_BH | |
112 | select ARCH_INLINE_SPIN_UNLOCK_IRQ | |
113 | select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE | |
114 | select ARCH_INLINE_READ_TRYLOCK | |
115 | select ARCH_INLINE_READ_LOCK | |
116 | select ARCH_INLINE_READ_LOCK_BH | |
117 | select ARCH_INLINE_READ_LOCK_IRQ | |
118 | select ARCH_INLINE_READ_LOCK_IRQSAVE | |
119 | select ARCH_INLINE_READ_UNLOCK | |
120 | select ARCH_INLINE_READ_UNLOCK_BH | |
121 | select ARCH_INLINE_READ_UNLOCK_IRQ | |
122 | select ARCH_INLINE_READ_UNLOCK_IRQRESTORE | |
123 | select ARCH_INLINE_WRITE_TRYLOCK | |
124 | select ARCH_INLINE_WRITE_LOCK | |
125 | select ARCH_INLINE_WRITE_LOCK_BH | |
126 | select ARCH_INLINE_WRITE_LOCK_IRQ | |
127 | select ARCH_INLINE_WRITE_LOCK_IRQSAVE | |
128 | select ARCH_INLINE_WRITE_UNLOCK | |
129 | select ARCH_INLINE_WRITE_UNLOCK_BH | |
130 | select ARCH_INLINE_WRITE_UNLOCK_IRQ | |
131 | select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE | |
af1839eb | 132 | select HAVE_UID16 if 32BIT |
c1d7e01d | 133 | select ARCH_WANT_IPC_PARSE_VERSION |
0f58aac9 | 134 | select HAVE_ARCH_TRANSPARENT_HUGEPAGE if 64BIT |
e80e7813 | 135 | select GENERIC_SMP_IDLE_THREAD |
70639421 | 136 | select GENERIC_TIME_VSYSCALL_OLD |
a6527b92 AMG |
137 | select GENERIC_CLOCKEVENTS |
138 | select KTIME_SCALAR if 32BIT | |
c63cb468 | 139 | select HAVE_ARCH_SECCOMP_FILTER |
f9a7e025 | 140 | select GENERIC_KERNEL_THREAD |
786d35d4 DH |
141 | select HAVE_MOD_ARCH_SPECIFIC |
142 | select MODULES_USE_ELF_RELA | |
1da177e4 | 143 | |
fca3e357 | 144 | config SCHED_OMIT_FRAME_POINTER |
6f9a3c33 | 145 | def_bool y |
fca3e357 | 146 | |
1da177e4 LT |
147 | source "init/Kconfig" |
148 | ||
dc52ddc0 MH |
149 | source "kernel/Kconfig.freezer" |
150 | ||
843c48fd JG |
151 | menu "Processor type and features" |
152 | ||
153 | config HAVE_MARCH_Z900_FEATURES | |
154 | def_bool n | |
155 | ||
156 | config HAVE_MARCH_Z990_FEATURES | |
157 | def_bool n | |
158 | select HAVE_MARCH_Z900_FEATURES | |
159 | ||
160 | config HAVE_MARCH_Z9_109_FEATURES | |
161 | def_bool n | |
162 | select HAVE_MARCH_Z990_FEATURES | |
163 | ||
164 | config HAVE_MARCH_Z10_FEATURES | |
165 | def_bool n | |
166 | select HAVE_MARCH_Z9_109_FEATURES | |
167 | ||
168 | config HAVE_MARCH_Z196_FEATURES | |
169 | def_bool n | |
170 | select HAVE_MARCH_Z10_FEATURES | |
171 | ||
172 | choice | |
173 | prompt "Processor type" | |
174 | default MARCH_G5 | |
175 | ||
176 | config MARCH_G5 | |
177 | bool "System/390 model G5 and G6" | |
178 | depends on !64BIT | |
179 | help | |
180 | Select this to build a 31 bit kernel that works | |
181 | on all ESA/390 and z/Architecture machines. | |
1da177e4 | 182 | |
843c48fd JG |
183 | config MARCH_Z900 |
184 | bool "IBM zSeries model z800 and z900" | |
185 | select HAVE_MARCH_Z900_FEATURES if 64BIT | |
186 | help | |
187 | Select this to enable optimizations for model z800/z900 (2064 and | |
188 | 2066 series). This will enable some optimizations that are not | |
189 | available on older ESA/390 (31 Bit) only CPUs. | |
190 | ||
191 | config MARCH_Z990 | |
192 | bool "IBM zSeries model z890 and z990" | |
193 | select HAVE_MARCH_Z990_FEATURES if 64BIT | |
194 | help | |
195 | Select this to enable optimizations for model z890/z990 (2084 and | |
196 | 2086 series). The kernel will be slightly faster but will not work | |
197 | on older machines. | |
198 | ||
199 | config MARCH_Z9_109 | |
200 | bool "IBM System z9" | |
201 | select HAVE_MARCH_Z9_109_FEATURES if 64BIT | |
202 | help | |
203 | Select this to enable optimizations for IBM System z9 (2094 and | |
204 | 2096 series). The kernel will be slightly faster but will not work | |
205 | on older machines. | |
206 | ||
207 | config MARCH_Z10 | |
208 | bool "IBM System z10" | |
209 | select HAVE_MARCH_Z10_FEATURES if 64BIT | |
210 | help | |
211 | Select this to enable optimizations for IBM System z10 (2097 and | |
212 | 2098 series). The kernel will be slightly faster but will not work | |
213 | on older machines. | |
214 | ||
215 | config MARCH_Z196 | |
216 | bool "IBM zEnterprise 114 and 196" | |
217 | select HAVE_MARCH_Z196_FEATURES if 64BIT | |
218 | help | |
219 | Select this to enable optimizations for IBM zEnterprise 114 and 196 | |
220 | (2818 and 2817 series). The kernel will be slightly faster but will | |
221 | not work on older machines. | |
1da177e4 | 222 | |
843c48fd | 223 | endchoice |
1da177e4 | 224 | |
347a8dc3 | 225 | config 64BIT |
6f9a3c33 MS |
226 | def_bool y |
227 | prompt "64 bit kernel" | |
1da177e4 | 228 | help |
db81a23d | 229 | Select this option if you have an IBM z/Architecture machine |
1da177e4 LT |
230 | and want to use the 64 bit addressing mode. |
231 | ||
d9f7a745 | 232 | config 32BIT |
6f9a3c33 | 233 | def_bool y if !64BIT |
d9f7a745 | 234 | |
843c48fd JG |
235 | config COMPAT |
236 | def_bool y | |
237 | prompt "Kernel support for 31 bit emulation" | |
238 | depends on 64BIT | |
239 | select COMPAT_BINFMT_ELF if BINFMT_ELF | |
240 | select ARCH_WANT_OLD_COMPAT_IPC | |
241 | help | |
242 | Select this option if you want to enable your system kernel to | |
243 | handle system-calls from ELF binaries for 31 bit ESA. This option | |
244 | (and some other stuff like libraries and such) is needed for | |
245 | executing 31 bit applications. It is safe to say "Y". | |
246 | ||
247 | config SYSVIPC_COMPAT | |
248 | def_bool y if COMPAT && SYSVIPC | |
249 | ||
250 | config KEYS_COMPAT | |
251 | def_bool y if COMPAT && KEYS | |
252 | ||
1da177e4 | 253 | config SMP |
6f9a3c33 MS |
254 | def_bool y |
255 | prompt "Symmetric multi-processing support" | |
1da177e4 LT |
256 | ---help--- |
257 | This enables support for systems with more than one CPU. If you have | |
258 | a system with only one CPU, like most personal computers, say N. If | |
259 | you have a system with more than one CPU, say Y. | |
260 | ||
261 | If you say N here, the kernel will run on single and multiprocessor | |
262 | machines, but will use only one CPU of a multiprocessor machine. If | |
263 | you say Y here, the kernel will run on many, but not all, | |
264 | singleprocessor machines. On a singleprocessor machine, the kernel | |
265 | will run faster if you say N here. | |
266 | ||
03502faa AB |
267 | See also the SMP-HOWTO available at |
268 | <http://www.tldp.org/docs.html#howto>. | |
1da177e4 LT |
269 | |
270 | Even if you don't know what to do here, say Y. | |
271 | ||
272 | config NR_CPUS | |
273 | int "Maximum number of CPUs (2-64)" | |
274 | range 2 64 | |
275 | depends on SMP | |
057c5cb3 HC |
276 | default "32" if !64BIT |
277 | default "64" if 64BIT | |
1da177e4 LT |
278 | help |
279 | This allows you to specify the maximum number of CPUs which this | |
280 | kernel will support. The maximum supported value is 64 and the | |
281 | minimum value which makes sense is 2. | |
282 | ||
283 | This is purely to save memory - each supported CPU adds | |
284 | approximately sixteen kilobytes to the kernel image. | |
285 | ||
286 | config HOTPLUG_CPU | |
6f9a3c33 MS |
287 | def_bool y |
288 | prompt "Support for hot-pluggable CPUs" | |
1da177e4 LT |
289 | depends on SMP |
290 | select HOTPLUG | |
1da177e4 LT |
291 | help |
292 | Say Y here to be able to turn CPUs off and on. CPUs | |
293 | can be controlled through /sys/devices/system/cpu/cpu#. | |
294 | Say N if you want to disable CPU hotplug. | |
295 | ||
8d11e021 | 296 | config SCHED_MC |
83a24e32 | 297 | def_bool n |
8d11e021 | 298 | |
4cb14bc8 | 299 | config SCHED_BOOK |
6f9a3c33 MS |
300 | def_bool y |
301 | prompt "Book scheduler support" | |
83a24e32 HC |
302 | depends on SMP |
303 | select SCHED_MC | |
4cb14bc8 HC |
304 | help |
305 | Book scheduler support improves the CPU scheduler's decision making | |
306 | when dealing with machines that have several books. | |
307 | ||
843c48fd JG |
308 | source kernel/Kconfig.preempt |
309 | ||
1da177e4 | 310 | config MATHEMU |
6f9a3c33 MS |
311 | def_bool y |
312 | prompt "IEEE FPU emulation" | |
1da177e4 LT |
313 | depends on MARCH_G5 |
314 | help | |
315 | This option is required for IEEE compliant floating point arithmetic | |
db81a23d | 316 | on older ESA/390 machines. Say Y unless you know your machine doesn't |
1da177e4 LT |
317 | need this. |
318 | ||
843c48fd | 319 | source kernel/Kconfig.hz |
1da177e4 | 320 | |
843c48fd | 321 | endmenu |
1da177e4 | 322 | |
843c48fd | 323 | menu "Memory setup" |
1d057720 | 324 | |
843c48fd | 325 | config ARCH_SPARSEMEM_ENABLE |
6f9a3c33 | 326 | def_bool y |
843c48fd JG |
327 | select SPARSEMEM_VMEMMAP_ENABLE |
328 | select SPARSEMEM_VMEMMAP | |
329 | select SPARSEMEM_STATIC if !64BIT | |
e65e1fc2 | 330 | |
843c48fd JG |
331 | config ARCH_SPARSEMEM_DEFAULT |
332 | def_bool y | |
1da177e4 | 333 | |
843c48fd JG |
334 | config ARCH_SELECT_MEMORY_MODEL |
335 | def_bool y | |
1da177e4 | 336 | |
843c48fd JG |
337 | config ARCH_ENABLE_MEMORY_HOTPLUG |
338 | def_bool y if SPARSEMEM | |
0efa4703 | 339 | |
843c48fd JG |
340 | config ARCH_ENABLE_MEMORY_HOTREMOVE |
341 | def_bool y | |
e37f50e1 | 342 | |
843c48fd JG |
343 | config FORCE_MAX_ZONEORDER |
344 | int | |
345 | default "9" | |
f861e405 | 346 | |
843c48fd | 347 | source "mm/Kconfig" |
1da177e4 LT |
348 | |
349 | config PACK_STACK | |
6f9a3c33 MS |
350 | def_bool y |
351 | prompt "Pack kernel stack" | |
1da177e4 LT |
352 | help |
353 | This option enables the compiler option -mkernel-backchain if it | |
354 | is available. If the option is available the compiler supports | |
355 | the new stack layout which dramatically reduces the minimum stack | |
356 | frame size. With an old compiler a non-leaf function needs a | |
357 | minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With | |
358 | -mkernel-backchain the minimum size drops to 16 byte on 31 bit | |
359 | and 24 byte on 64 bit. | |
360 | ||
361 | Say Y if you are unsure. | |
362 | ||
363 | config SMALL_STACK | |
6f9a3c33 MS |
364 | def_bool n |
365 | prompt "Use 8kb for kernel stack instead of 16kb" | |
7f5a8ba6 | 366 | depends on PACK_STACK && 64BIT && !LOCKDEP |
1da177e4 LT |
367 | help |
368 | If you say Y here and the compiler supports the -mkernel-backchain | |
7f5a8ba6 HC |
369 | option the kernel will use a smaller kernel stack size. The reduced |
370 | size is 8kb instead of 16kb. This allows to run more threads on a | |
371 | system and reduces the pressure on the memory management for higher | |
372 | order page allocations. | |
1da177e4 LT |
373 | |
374 | Say N if you are unsure. | |
375 | ||
1da177e4 | 376 | config CHECK_STACK |
6f9a3c33 MS |
377 | def_bool y |
378 | prompt "Detect kernel stack overflow" | |
1da177e4 LT |
379 | help |
380 | This option enables the compiler option -mstack-guard and | |
381 | -mstack-size if they are available. If the compiler supports them | |
382 | it will emit additional code to each function prolog to trigger | |
383 | an illegal operation if the kernel stack is about to overflow. | |
384 | ||
385 | Say N if you are unsure. | |
386 | ||
387 | config STACK_GUARD | |
388 | int "Size of the guard area (128-1024)" | |
389 | range 128 1024 | |
390 | depends on CHECK_STACK | |
391 | default "256" | |
392 | help | |
393 | This allows you to specify the size of the guard area at the lower | |
394 | end of the kernel stack. If the kernel stack points into the guard | |
395 | area on function entry an illegal operation is triggered. The size | |
396 | needs to be a power of 2. Please keep in mind that the size of an | |
397 | interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit. | |
398 | The minimum size for the stack guard should be 256 for 31 bit and | |
399 | 512 for 64 bit. | |
400 | ||
2c190da4 | 401 | config WARN_DYNAMIC_STACK |
6f9a3c33 | 402 | def_bool n |
2c190da4 | 403 | prompt "Emit compiler warnings for function with dynamic stack usage" |
1da177e4 | 404 | help |
2c190da4 JG |
405 | This option enables the compiler option -mwarn-dynamicstack. If the |
406 | compiler supports this options generates warnings for functions | |
407 | that dynamically allocate stack space using alloca. | |
1da177e4 LT |
408 | |
409 | Say N if you are unsure. | |
410 | ||
843c48fd | 411 | endmenu |
3f22ab27 | 412 | |
843c48fd | 413 | menu "I/O subsystem" |
1da177e4 | 414 | |
1da177e4 | 415 | config QDIO |
6f9a3c33 MS |
416 | def_tristate y |
417 | prompt "QDIO support" | |
1da177e4 | 418 | ---help--- |
8129ee16 | 419 | This driver provides the Queued Direct I/O base support for |
efca13bc | 420 | IBM System z. |
1da177e4 LT |
421 | |
422 | To compile this driver as a module, choose M here: the | |
423 | module will be called qdio. | |
424 | ||
425 | If unsure, say Y. | |
426 | ||
9d92a7e1 | 427 | config CHSC_SCH |
d9c11b1e | 428 | def_tristate m |
6f9a3c33 | 429 | prompt "Support for CHSC subchannels" |
9d92a7e1 CH |
430 | help |
431 | This driver allows usage of CHSC subchannels. A CHSC subchannel | |
432 | is usually present on LPAR only. | |
433 | The driver creates a device /dev/chsc, which may be used to | |
434 | obtain I/O configuration information about the machine and | |
435 | to issue asynchronous chsc commands (DANGEROUS). | |
436 | You will usually only want to use this interface on a special | |
437 | LPAR designated for system management. | |
438 | ||
439 | To compile this driver as a module, choose M here: the | |
440 | module will be called chsc_sch. | |
441 | ||
442 | If unsure, say N. | |
443 | ||
1d1c8f78 SO |
444 | config SCM_BUS |
445 | def_bool y | |
446 | depends on 64BIT | |
447 | prompt "SCM bus driver" | |
448 | help | |
449 | Bus driver for Storage Class Memory. | |
450 | ||
eadb86ab SO |
451 | config EADM_SCH |
452 | def_tristate m | |
453 | prompt "Support for EADM subchannels" | |
454 | depends on SCM_BUS | |
455 | help | |
456 | This driver allows usage of EADM subchannels. EADM subchannels act | |
457 | as a communication vehicle for SCM increments. | |
458 | ||
459 | To compile this driver as a module, choose M here: the | |
460 | module will be called eadm_sch. | |
461 | ||
843c48fd JG |
462 | endmenu |
463 | ||
464 | menu "Dump support" | |
465 | ||
466 | config CRASH_DUMP | |
467 | bool "kernel crash dumps" | |
468 | depends on 64BIT && SMP | |
469 | select KEXEC | |
470 | help | |
471 | Generate crash dump after being started by kexec. | |
472 | Crash dump kernels are loaded in the main kernel with kexec-tools | |
473 | into a specially reserved region and then later executed after | |
474 | a crash by kdump/kexec. | |
475 | For more details see Documentation/kdump/kdump.txt | |
476 | ||
477 | config ZFCPDUMP | |
478 | def_bool n | |
479 | prompt "zfcpdump support" | |
480 | select SMP | |
481 | help | |
482 | Select this option if you want to build an zfcpdump enabled kernel. | |
483 | Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this. | |
484 | ||
485 | endmenu | |
486 | ||
487 | menu "Executable file formats / Emulations" | |
1da177e4 | 488 | |
1da177e4 LT |
489 | source "fs/Kconfig.binfmt" |
490 | ||
843c48fd JG |
491 | config SECCOMP |
492 | def_bool y | |
493 | prompt "Enable seccomp to safely compute untrusted bytecode" | |
494 | depends on PROC_FS | |
495 | help | |
496 | This kernel feature is useful for number crunching applications | |
497 | that may need to compute untrusted bytecode during their | |
498 | execution. By using pipes or other transports made available to | |
499 | the process as file descriptors supporting the read/write | |
500 | syscalls, it's possible to isolate those applications in | |
501 | their own address space using seccomp. Once seccomp is | |
502 | enabled via /proc/<pid>/seccomp, it cannot be disabled | |
503 | and the task is only allowed to execute a few safe syscalls | |
504 | defined by each seccomp mode. | |
505 | ||
506 | If unsure, say Y. | |
507 | ||
508 | endmenu | |
509 | ||
510 | menu "Power Management" | |
511 | ||
512 | config ARCH_HIBERNATION_POSSIBLE | |
513 | def_bool y if 64BIT | |
514 | ||
515 | source "kernel/power/Kconfig" | |
516 | ||
517 | endmenu | |
518 | ||
519 | source "net/Kconfig" | |
520 | ||
521 | config PCMCIA | |
522 | def_bool n | |
523 | ||
524 | config CCW | |
525 | def_bool y | |
526 | ||
527 | source "drivers/Kconfig" | |
528 | ||
529 | source "fs/Kconfig" | |
530 | ||
531 | source "arch/s390/Kconfig.debug" | |
532 | ||
533 | source "security/Kconfig" | |
534 | ||
535 | source "crypto/Kconfig" | |
536 | ||
537 | source "lib/Kconfig" | |
538 | ||
539 | menu "Virtualization" | |
684de39b | 540 | |
1da177e4 | 541 | config PFAULT |
6f9a3c33 MS |
542 | def_bool y |
543 | prompt "Pseudo page fault support" | |
1da177e4 LT |
544 | help |
545 | Select this option, if you want to use PFAULT pseudo page fault | |
546 | handling under VM. If running native or in LPAR, this option | |
547 | has no effect. If your VM does not support PFAULT, PAGEEX | |
548 | pseudo page fault handling will be used. | |
549 | Note that VM 4.2 supports PFAULT but has a bug in its | |
550 | implementation that causes some problems. | |
551 | Everybody who wants to run Linux under VM != VM4.2 should select | |
552 | this option. | |
553 | ||
554 | config SHARED_KERNEL | |
0eccc783 HC |
555 | bool "VM shared kernel support" |
556 | depends on !JUMP_LABEL | |
1da177e4 LT |
557 | help |
558 | Select this option, if you want to share the text segment of the | |
559 | Linux kernel between different VM guests. This reduces memory | |
560 | usage with lots of guests but greatly increases kernel size. | |
9c9c1761 HC |
561 | Also if a kernel was IPL'ed from a shared segment the kexec system |
562 | call will not work. | |
1da177e4 LT |
563 | You should only select this option if you know what you are |
564 | doing and want to exploit this feature. | |
565 | ||
566 | config CMM | |
6f9a3c33 MS |
567 | def_tristate n |
568 | prompt "Cooperative memory management" | |
1da177e4 LT |
569 | help |
570 | Select this option, if you want to enable the kernel interface | |
571 | to reduce the memory size of the system. This is accomplished | |
572 | by allocating pages of memory and put them "on hold". This only | |
573 | makes sense for a system running under VM where the unused pages | |
574 | will be reused by VM for other guest systems. The interface | |
575 | allows an external monitor to balance memory of many systems. | |
576 | Everybody who wants to run Linux under VM should select this | |
577 | option. | |
578 | ||
1da177e4 | 579 | config CMM_IUCV |
6f9a3c33 MS |
580 | def_bool y |
581 | prompt "IUCV special message interface to cooperative memory management" | |
1da177e4 LT |
582 | depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV) |
583 | help | |
584 | Select this option to enable the special message interface to | |
585 | the cooperative memory management. | |
586 | ||
1da177e4 | 587 | config APPLDATA_BASE |
6f9a3c33 MS |
588 | def_bool n |
589 | prompt "Linux - VM Monitor Stream, base infrastructure" | |
c185b783 | 590 | depends on PROC_FS |
1da177e4 LT |
591 | help |
592 | This provides a kernel interface for creating and updating z/VM APPLDATA | |
593 | monitor records. The monitor records are updated at certain time | |
594 | intervals, once the timer is started. | |
595 | Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer, | |
596 | i.e. enables or disables monitoring on the Linux side. | |
597 | A custom interval value (in seconds) can be written to | |
598 | /proc/appldata/interval. | |
599 | ||
600 | Defaults are 60 seconds interval and timer off. | |
601 | The /proc entries can also be read from, showing the current settings. | |
602 | ||
603 | config APPLDATA_MEM | |
6f9a3c33 MS |
604 | def_tristate m |
605 | prompt "Monitor memory management statistics" | |
62fb2ba3 | 606 | depends on APPLDATA_BASE && VM_EVENT_COUNTERS |
1da177e4 LT |
607 | help |
608 | This provides memory management related data to the Linux - VM Monitor | |
609 | Stream, like paging/swapping rate, memory utilisation, etc. | |
610 | Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM | |
611 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
612 | on the z/VM side. | |
613 | ||
614 | Default is disabled. | |
615 | The /proc entry can also be read from, showing the current settings. | |
616 | ||
617 | This can also be compiled as a module, which will be called | |
618 | appldata_mem.o. | |
619 | ||
620 | config APPLDATA_OS | |
6f9a3c33 MS |
621 | def_tristate m |
622 | prompt "Monitor OS statistics" | |
1da177e4 LT |
623 | depends on APPLDATA_BASE |
624 | help | |
625 | This provides OS related data to the Linux - VM Monitor Stream, like | |
626 | CPU utilisation, etc. | |
627 | Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM | |
628 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
629 | on the z/VM side. | |
630 | ||
631 | Default is disabled. | |
632 | This can also be compiled as a module, which will be called | |
633 | appldata_os.o. | |
634 | ||
635 | config APPLDATA_NET_SUM | |
6f9a3c33 MS |
636 | def_tristate m |
637 | prompt "Monitor overall network statistics" | |
70193af9 | 638 | depends on APPLDATA_BASE && NET |
1da177e4 LT |
639 | help |
640 | This provides network related data to the Linux - VM Monitor Stream, | |
641 | currently there is only a total sum of network I/O statistics, no | |
642 | per-interface data. | |
643 | Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM | |
644 | APPLDATA monitor record, i.e. enables or disables monitoring this record | |
645 | on the z/VM side. | |
646 | ||
647 | Default is disabled. | |
648 | This can also be compiled as a module, which will be called | |
649 | appldata_net_sum.o. | |
650 | ||
24bbb1fa | 651 | config S390_HYPFS_FS |
6f9a3c33 MS |
652 | def_bool y |
653 | prompt "s390 hypervisor file system support" | |
24bbb1fa | 654 | select SYS_HYPERVISOR |
24bbb1fa MH |
655 | help |
656 | This is a virtual file system intended to provide accounting | |
657 | information in an s390 hypervisor environment. | |
658 | ||
843c48fd | 659 | source "arch/s390/kvm/Kconfig" |
411ed322 | 660 | |
fa587743 | 661 | config S390_GUEST |
6f9a3c33 | 662 | def_bool y |
bdd1fc27 | 663 | prompt "s390 support for virtio devices (EXPERIMENTAL)" |
fa587743 | 664 | depends on 64BIT && EXPERIMENTAL |
80629b0b | 665 | select VIRTUALIZATION |
fa587743 | 666 | select VIRTIO |
faeba830 | 667 | select VIRTIO_CONSOLE |
fa587743 | 668 | help |
bdd1fc27 CH |
669 | Enabling this option adds support for virtio based paravirtual device |
670 | drivers on s390. | |
1da177e4 | 671 | |
20766c08 | 672 | Select this option if you want to run the kernel as a guest under |
bdd1fc27 | 673 | the KVM hypervisor. |
155af2f9 HJP |
674 | |
675 | endmenu |