Kconfig 23.0 KB
Newer Older
L
Linus Torvalds 已提交
1
config MMU
2
	def_bool y
L
Linus Torvalds 已提交
3

4
config ZONE_DMA
5
	def_bool y
6

7 8 9
config CPU_BIG_ENDIAN
	def_bool y

I
Ingo Molnar 已提交
10
config LOCKDEP_SUPPORT
11
	def_bool y
I
Ingo Molnar 已提交
12

13
config STACKTRACE_SUPPORT
14
	def_bool y
15

L
Linus Torvalds 已提交
16 17 18 19
config RWSEM_GENERIC_SPINLOCK
	bool

config RWSEM_XCHGADD_ALGORITHM
20
	def_bool y
L
Linus Torvalds 已提交
21

22
config ARCH_HAS_ILOG2_U32
M
Martin Schwidefsky 已提交
23
	def_bool n
24 25

config ARCH_HAS_ILOG2_U64
M
Martin Schwidefsky 已提交
26
	def_bool n
27

28
config GENERIC_HWEIGHT
29
	def_bool y
30

H
Heiko Carstens 已提交
31
config GENERIC_BUG
M
Martin Schwidefsky 已提交
32
	def_bool y if BUG
H
Heiko Carstens 已提交
33

34 35 36
config GENERIC_BUG_RELATIVE_POINTERS
	def_bool y

37
config ARCH_DMA_ADDR_T_64BIT
H
Heiko Carstens 已提交
38
	def_bool y
39

40
config GENERIC_LOCKBREAK
M
Martin Schwidefsky 已提交
41
	def_bool y if SMP && PREEMPT
42

43
config PGSTE
M
Martin Schwidefsky 已提交
44
	def_bool y if KVM
45

A
Akinobu Mita 已提交
46 47 48
config ARCH_SUPPORTS_DEBUG_PAGEALLOC
	def_bool y

49 50
config KEXEC
	def_bool y
51
	select KEXEC_CORE
52 53 54 55

config AUDIT_ARCH
	def_bool y

56
config NO_IOPORT_MAP
J
Jan Glauber 已提交
57 58 59 60 61
	def_bool y

config PCI_QUIRKS
	def_bool n

62
config ARCH_SUPPORTS_UPROBES
H
Heiko Carstens 已提交
63
	def_bool y
64

H
Heiko Carstens 已提交
65 66 67
config DEBUG_RODATA
	def_bool y

68
config S390
69
	def_bool y
70
	select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
71
	select ARCH_HAS_DEVMEM_IS_ALLOWED
72
	select ARCH_HAS_ELF_RANDOMIZE
73
	select ARCH_HAS_GCOV_PROFILE_ALL
H
Heiko Carstens 已提交
74
	select ARCH_HAS_KCOV
H
Heiko Carstens 已提交
75
	select ARCH_HAS_SG_CHAIN
C
Christian Borntraeger 已提交
76
	select ARCH_HAS_UBSAN_SANITIZE_ALL
77
	select ARCH_HAVE_NMI_SAFE_CMPXCHG
78 79 80 81
	select ARCH_INLINE_READ_LOCK
	select ARCH_INLINE_READ_LOCK_BH
	select ARCH_INLINE_READ_LOCK_IRQ
	select ARCH_INLINE_READ_LOCK_IRQSAVE
82
	select ARCH_INLINE_READ_TRYLOCK
83 84 85 86
	select ARCH_INLINE_READ_UNLOCK
	select ARCH_INLINE_READ_UNLOCK_BH
	select ARCH_INLINE_READ_UNLOCK_IRQ
	select ARCH_INLINE_READ_UNLOCK_IRQRESTORE
87 88 89 90 91 92 93 94 95 96
	select ARCH_INLINE_SPIN_LOCK
	select ARCH_INLINE_SPIN_LOCK_BH
	select ARCH_INLINE_SPIN_LOCK_IRQ
	select ARCH_INLINE_SPIN_LOCK_IRQSAVE
	select ARCH_INLINE_SPIN_TRYLOCK
	select ARCH_INLINE_SPIN_TRYLOCK_BH
	select ARCH_INLINE_SPIN_UNLOCK
	select ARCH_INLINE_SPIN_UNLOCK_BH
	select ARCH_INLINE_SPIN_UNLOCK_IRQ
	select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE
97 98 99 100
	select ARCH_INLINE_WRITE_LOCK
	select ARCH_INLINE_WRITE_LOCK_BH
	select ARCH_INLINE_WRITE_LOCK_IRQ
	select ARCH_INLINE_WRITE_LOCK_IRQSAVE
101
	select ARCH_INLINE_WRITE_TRYLOCK
102 103 104 105
	select ARCH_INLINE_WRITE_UNLOCK
	select ARCH_INLINE_WRITE_UNLOCK_BH
	select ARCH_INLINE_WRITE_UNLOCK_IRQ
	select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
106
	select ARCH_SAVE_PAGE_KEYS if HIBERNATION
107
	select ARCH_SUPPORTS_ATOMIC_RMW
108
	select ARCH_SUPPORTS_NUMA_BALANCING
109
	select ARCH_USE_BUILTIN_BSWAP
110
	select ARCH_USE_CMPXCHG_LOCKREF
111
	select ARCH_WANTS_DYNAMIC_TASK_STRUCT
112
	select ARCH_WANTS_PROT_NUMA_PROT_NONE
C
Christian Borntraeger 已提交
113
	select ARCH_WANTS_UBSAN_NO_NULL
114
	select ARCH_WANT_IPC_PARSE_VERSION
115 116
	select BUILDTIME_EXTABLE_SORT
	select CLONE_BACKWARDS2
117
	select DYNAMIC_FTRACE if FUNCTION_TRACER
118
	select GENERIC_CLOCKEVENTS
119
	select GENERIC_CPU_AUTOPROBE
120
	select GENERIC_CPU_DEVICES if !SMP
121
	select GENERIC_FIND_FIRST_BIT
122
	select GENERIC_SMP_IDLE_THREAD
123
	select GENERIC_TIME_VSYSCALL
124
	select HAVE_ALIGNED_STRUCT_PAGE if SLUB
125
	select HAVE_ARCH_AUDITSYSCALL
126
	select HAVE_ARCH_EARLY_PFN_TO_NID
127
	select HAVE_ARCH_HARDENED_USERCOPY
H
Heiko Carstens 已提交
128
	select HAVE_ARCH_JUMP_LABEL
129
	select CPU_NO_EFFICIENT_FFS if !HAVE_MARCH_Z9_109_FEATURES
130
	select HAVE_ARCH_SECCOMP_FILTER
131
	select HAVE_ARCH_SOFT_DIRTY
132
	select HAVE_ARCH_TRACEHOOK
H
Heiko Carstens 已提交
133
	select HAVE_ARCH_TRANSPARENT_HUGEPAGE
134
	select HAVE_EBPF_JIT if PACK_STACK && HAVE_MARCH_Z196_FEATURES
135 136 137
	select HAVE_CMPXCHG_DOUBLE
	select HAVE_CMPXCHG_LOCAL
	select HAVE_DEBUG_KMEMLEAK
138
	select HAVE_DMA_API_DEBUG
H
Heiko Carstens 已提交
139 140
	select HAVE_DYNAMIC_FTRACE
	select HAVE_DYNAMIC_FTRACE_WITH_REGS
141
	select HAVE_EFFICIENT_UNALIGNED_ACCESS
J
Jiri Slaby 已提交
142
	select HAVE_EXIT_THREAD
143
	select HAVE_FTRACE_MCOUNT_RECORD
H
Heiko Carstens 已提交
144 145
	select HAVE_FUNCTION_GRAPH_TRACER
	select HAVE_FUNCTION_TRACER
146
	select HAVE_FUTEX_CMPXCHG if FUTEX
147 148
	select HAVE_KERNEL_BZIP2
	select HAVE_KERNEL_GZIP
149
	select HAVE_KERNEL_LZ4
150 151 152 153 154
	select HAVE_KERNEL_LZMA
	select HAVE_KERNEL_LZO
	select HAVE_KERNEL_XZ
	select HAVE_KPROBES
	select HAVE_KRETPROBES
H
Heiko Carstens 已提交
155
	select HAVE_KVM
J
Jiri Slaby 已提交
156
	select HAVE_LIVEPATCH
157 158
	select HAVE_MEMBLOCK
	select HAVE_MEMBLOCK_NODE_MAP
159
	select HAVE_MEMBLOCK_PHYS_MAP
160
	select HAVE_MOD_ARCH_SPECIFIC
161 162 163 164 165
	select HAVE_OPROFILE
	select HAVE_PERF_EVENTS
	select HAVE_REGS_AND_STACK_ACCESS_API
	select HAVE_SYSCALL_TRACEPOINTS
	select HAVE_VIRT_CPU_ACCOUNTING
166
	select MODULES_USE_ELF_RELA
167
	select NO_BOOTMEM
168
	select OLD_SIGACTION
H
Heiko Carstens 已提交
169
	select OLD_SIGSUSPEND3
S
Sebastian Ott 已提交
170
	select SPARSE_IRQ
171
	select SYSCTL_EXCEPTION_TRACE
172
	select TTY
173
	select VIRT_CPU_ACCOUNTING
H
Heiko Carstens 已提交
174
	select VIRT_TO_BUS
175
	select HAVE_NMI
176

L
Linus Torvalds 已提交
177

178
config SCHED_OMIT_FRAME_POINTER
M
Martin Schwidefsky 已提交
179
	def_bool y
180

181 182
config PGTABLE_LEVELS
	int
183
	default 4
184

L
Linus Torvalds 已提交
185 186
source "init/Kconfig"

187 188
source "kernel/Kconfig.freezer"

J
Jiri Slaby 已提交
189 190
source "kernel/livepatch/Kconfig"

191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211
menu "Processor type and features"

config HAVE_MARCH_Z900_FEATURES
	def_bool n

config HAVE_MARCH_Z990_FEATURES
	def_bool n
	select HAVE_MARCH_Z900_FEATURES

config HAVE_MARCH_Z9_109_FEATURES
	def_bool n
	select HAVE_MARCH_Z990_FEATURES

config HAVE_MARCH_Z10_FEATURES
	def_bool n
	select HAVE_MARCH_Z9_109_FEATURES

config HAVE_MARCH_Z196_FEATURES
	def_bool n
	select HAVE_MARCH_Z10_FEATURES

212 213 214 215
config HAVE_MARCH_ZEC12_FEATURES
	def_bool n
	select HAVE_MARCH_Z196_FEATURES

216 217 218 219
config HAVE_MARCH_Z13_FEATURES
	def_bool n
	select HAVE_MARCH_ZEC12_FEATURES

220 221
choice
	prompt "Processor type"
222
	default MARCH_Z196
L
Linus Torvalds 已提交
223

224 225
config MARCH_Z900
	bool "IBM zSeries model z800 and z900"
H
Heiko Carstens 已提交
226
	select HAVE_MARCH_Z900_FEATURES
227 228 229 230 231 232 233
	help
	  Select this to enable optimizations for model z800/z900 (2064 and
	  2066 series). This will enable some optimizations that are not
	  available on older ESA/390 (31 Bit) only CPUs.

config MARCH_Z990
	bool "IBM zSeries model z890 and z990"
H
Heiko Carstens 已提交
234
	select HAVE_MARCH_Z990_FEATURES
235 236 237 238 239 240 241
	help
	  Select this to enable optimizations for model z890/z990 (2084 and
	  2086 series). The kernel will be slightly faster but will not work
	  on older machines.

config MARCH_Z9_109
	bool "IBM System z9"
H
Heiko Carstens 已提交
242
	select HAVE_MARCH_Z9_109_FEATURES
243 244 245 246 247 248 249
	help
	  Select this to enable optimizations for IBM System z9 (2094 and
	  2096 series). The kernel will be slightly faster but will not work
	  on older machines.

config MARCH_Z10
	bool "IBM System z10"
H
Heiko Carstens 已提交
250
	select HAVE_MARCH_Z10_FEATURES
251 252 253 254 255 256 257
	help
	  Select this to enable optimizations for IBM System z10 (2097 and
	  2098 series). The kernel will be slightly faster but will not work
	  on older machines.

config MARCH_Z196
	bool "IBM zEnterprise 114 and 196"
H
Heiko Carstens 已提交
258
	select HAVE_MARCH_Z196_FEATURES
259 260 261 262
	help
	  Select this to enable optimizations for IBM zEnterprise 114 and 196
	  (2818 and 2817 series). The kernel will be slightly faster but will
	  not work on older machines.
L
Linus Torvalds 已提交
263

264
config MARCH_ZEC12
265
	bool "IBM zBC12 and zEC12"
H
Heiko Carstens 已提交
266
	select HAVE_MARCH_ZEC12_FEATURES
267
	help
268 269 270
	  Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and
	  2827 series). The kernel will be slightly faster but will not work on
	  older machines.
271

272
config MARCH_Z13
273
	bool "IBM z13s and z13"
H
Heiko Carstens 已提交
274
	select HAVE_MARCH_Z13_FEATURES
275
	help
276 277 278
	  Select this to enable optimizations for IBM z13s and z13 (2965 and
	  2964 series). The kernel will be slightly faster but will not work on
	  older machines.
279

280
endchoice
L
Linus Torvalds 已提交
281

282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299
config MARCH_Z900_TUNE
	def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT

config MARCH_Z990_TUNE
	def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT

config MARCH_Z9_109_TUNE
	def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT

config MARCH_Z10_TUNE
	def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT

config MARCH_Z196_TUNE
	def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT

config MARCH_ZEC12_TUNE
	def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT

300 301 302
config MARCH_Z13_TUNE
	def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT

303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337
choice
	prompt "Tune code generation"
	default TUNE_DEFAULT
	help
	  Cause the compiler to tune (-mtune) the generated code for a machine.
	  This will make the code run faster on the selected machine but
	  somewhat slower on other machines.
	  This option only changes how the compiler emits instructions, not the
	  selection of instructions itself, so the resulting kernel will run on
	  all other machines.

config TUNE_DEFAULT
	bool "Default"
	help
	  Tune the generated code for the target processor for which the kernel
	  will be compiled.

config TUNE_Z900
	bool "IBM zSeries model z800 and z900"

config TUNE_Z990
	bool "IBM zSeries model z890 and z990"

config TUNE_Z9_109
	bool "IBM System z9"

config TUNE_Z10
	bool "IBM System z10"

config TUNE_Z196
	bool "IBM zEnterprise 114 and 196"

config TUNE_ZEC12
	bool "IBM zBC12 and zEC12"

338 339 340
config TUNE_Z13
	bool "IBM z13"

341 342
endchoice

343
config 64BIT
M
Martin Schwidefsky 已提交
344
	def_bool y
345

346 347 348 349 350
config COMPAT
	def_bool y
	prompt "Kernel support for 31 bit emulation"
	select COMPAT_BINFMT_ELF if BINFMT_ELF
	select ARCH_WANT_OLD_COMPAT_IPC
351
	select COMPAT_OLD_SIGACTION
352
	depends on MULTIUSER
353 354 355 356 357 358 359 360 361 362 363 364
	help
	  Select this option if you want to enable your system kernel to
	  handle system-calls from ELF binaries for 31 bit ESA.  This option
	  (and some other stuff like libraries and such) is needed for
	  executing 31 bit applications.  It is safe to say "Y".

config SYSVIPC_COMPAT
	def_bool y if COMPAT && SYSVIPC

config KEYS_COMPAT
	def_bool y if COMPAT && KEYS

L
Linus Torvalds 已提交
365
config SMP
M
Martin Schwidefsky 已提交
366 367
	def_bool y
	prompt "Symmetric multi-processing support"
L
Linus Torvalds 已提交
368 369 370 371 372
	---help---
	  This enables support for systems with more than one CPU. If you have
	  a system with only one CPU, like most personal computers, say N. If
	  you have a system with more than one CPU, say Y.

373
	  If you say N here, the kernel will run on uni- and multiprocessor
L
Linus Torvalds 已提交
374 375
	  machines, but will use only one CPU of a multiprocessor machine. If
	  you say Y here, the kernel will run on many, but not all,
376
	  uniprocessor machines. On a uniprocessor machine, the kernel
L
Linus Torvalds 已提交
377 378
	  will run faster if you say N here.

A
Adrian Bunk 已提交
379 380
	  See also the SMP-HOWTO available at
	  <http://www.tldp.org/docs.html#howto>.
L
Linus Torvalds 已提交
381 382 383 384

	  Even if you don't know what to do here, say Y.

config NR_CPUS
385 386
	int "Maximum number of CPUs (2-512)"
	range 2 512
L
Linus Torvalds 已提交
387
	depends on SMP
H
Heiko Carstens 已提交
388
	default "64"
L
Linus Torvalds 已提交
389 390
	help
	  This allows you to specify the maximum number of CPUs which this
391
	  kernel will support. The maximum supported value is 512 and the
L
Linus Torvalds 已提交
392 393 394 395 396 397
	  minimum value which makes sense is 2.

	  This is purely to save memory - each supported CPU adds
	  approximately sixteen kilobytes to the kernel image.

config HOTPLUG_CPU
M
Martin Schwidefsky 已提交
398 399
	def_bool y
	prompt "Support for hot-pluggable CPUs"
L
Linus Torvalds 已提交
400 401 402 403 404 405
	depends on SMP
	help
	  Say Y here to be able to turn CPUs off and on. CPUs
	  can be controlled through /sys/devices/system/cpu/cpu#.
	  Say N if you want to disable CPU hotplug.

406 407 408 409 410 411 412 413 414 415
# Some NUMA nodes have memory ranges that span
# other nodes.	Even though a pfn is valid and
# between a node's start and end pfns, it may not
# reside on that node.	See memmap_init_zone()
# for details. <- They meant memory holes!
config NODES_SPAN_OTHER_NODES
	def_bool NUMA

config NUMA
	bool "NUMA support"
416
	depends on SMP && SCHED_TOPOLOGY
417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438
	default n
	help
	  Enable NUMA support

	  This option adds NUMA support to the kernel.

	  An operation mode can be selected by appending
	  numa=<method> to the kernel command line.

	  The default behaviour is identical to appending numa=plain to
	  the command line. This will create just one node with all
	  available memory and all CPUs in it.

config NODES_SHIFT
	int "Maximum NUMA nodes (as a power of 2)"
	range 1 10
	depends on NUMA
	default "4"
	help
	  Specify the maximum number of NUMA nodes available on the target
	  system. Increases memory reserved to accommodate various tables.

439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474
menu "Select NUMA modes"
	depends on NUMA

config NUMA_EMU
	bool "NUMA emulation"
	default y
	help
	  Numa emulation mode will split the available system memory into
	  equal chunks which then are distributed over the configured number
	  of nodes in a round-robin manner.

	  The number of fake nodes is limited by the number of available memory
	  chunks (i.e. memory size / fake size) and the number of supported
	  nodes in the kernel.

	  The CPUs are assigned to the nodes in a way that partially respects
	  the original machine topology (if supported by the machine).
	  Fair distribution of the CPUs is not guaranteed.

config EMU_SIZE
	hex "NUMA emulation memory chunk size"
	default 0x10000000
	range 0x400000 0x100000000
	depends on NUMA_EMU
	help
	  Select the default size by which the memory is chopped and then
	  assigned to emulated NUMA nodes.

	  This can be overridden by specifying

	  emu_size=<n>

	  on the kernel command line where also suffixes K, M, G, and T are
	  supported.

endmenu
475 476 477

config SCHED_SMT
	def_bool n
478

479
config SCHED_MC
480
	def_bool n
481

482
config SCHED_BOOK
M
Martin Schwidefsky 已提交
483 484
	def_bool n

485 486 487
config SCHED_DRAWER
	def_bool n

M
Martin Schwidefsky 已提交
488
config SCHED_TOPOLOGY
M
Martin Schwidefsky 已提交
489
	def_bool y
M
Martin Schwidefsky 已提交
490
	prompt "Topology scheduler support"
491
	depends on SMP
M
Martin Schwidefsky 已提交
492
	select SCHED_SMT
493
	select SCHED_MC
M
Martin Schwidefsky 已提交
494
	select SCHED_BOOK
495
	select SCHED_DRAWER
496
	help
M
Martin Schwidefsky 已提交
497 498 499
	  Topology scheduler support improves the CPU scheduler's decision
	  making when dealing with machines that have multi-threading,
	  multiple cores or multiple books.
500

501 502 503
source kernel/Kconfig.preempt

source kernel/Kconfig.hz
L
Linus Torvalds 已提交
504

505
endmenu
L
Linus Torvalds 已提交
506

507
menu "Memory setup"
508

509
config ARCH_SPARSEMEM_ENABLE
M
Martin Schwidefsky 已提交
510
	def_bool y
511 512
	select SPARSEMEM_VMEMMAP_ENABLE
	select SPARSEMEM_VMEMMAP
513

514 515
config ARCH_SPARSEMEM_DEFAULT
	def_bool y
L
Linus Torvalds 已提交
516

517 518
config ARCH_SELECT_MEMORY_MODEL
	def_bool y
L
Linus Torvalds 已提交
519

520 521
config ARCH_ENABLE_MEMORY_HOTPLUG
	def_bool y if SPARSEMEM
522

523 524
config ARCH_ENABLE_MEMORY_HOTREMOVE
	def_bool y
525

526 527 528
config ARCH_ENABLE_SPLIT_PMD_PTLOCK
	def_bool y

529 530 531
config FORCE_MAX_ZONEORDER
	int
	default "9"
532

533
source "mm/Kconfig"
L
Linus Torvalds 已提交
534 535

config PACK_STACK
M
Martin Schwidefsky 已提交
536 537
	def_bool y
	prompt "Pack kernel stack"
L
Linus Torvalds 已提交
538 539 540 541 542 543 544 545 546 547 548 549
	help
	  This option enables the compiler option -mkernel-backchain if it
	  is available. If the option is available the compiler supports
	  the new stack layout which dramatically reduces the minimum stack
	  frame size. With an old compiler a non-leaf function needs a
	  minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With
	  -mkernel-backchain the minimum size drops to 16 byte on 31 bit
	  and 24 byte on 64 bit.

	  Say Y if you are unsure.

config CHECK_STACK
M
Martin Schwidefsky 已提交
550 551
	def_bool y
	prompt "Detect kernel stack overflow"
L
Linus Torvalds 已提交
552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573
	help
	  This option enables the compiler option -mstack-guard and
	  -mstack-size if they are available. If the compiler supports them
	  it will emit additional code to each function prolog to trigger
	  an illegal operation if the kernel stack is about to overflow.

	  Say N if you are unsure.

config STACK_GUARD
	int "Size of the guard area (128-1024)"
	range 128 1024
	depends on CHECK_STACK
	default "256"
	help
	  This allows you to specify the size of the guard area at the lower
	  end of the kernel stack. If the kernel stack points into the guard
	  area on function entry an illegal operation is triggered. The size
	  needs to be a power of 2. Please keep in mind that the size of an
	  interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
	  The minimum size for the stack guard should be 256 for 31 bit and
	  512 for 64 bit.

574
config WARN_DYNAMIC_STACK
M
Martin Schwidefsky 已提交
575
	def_bool n
576
	prompt "Emit compiler warnings for function with dynamic stack usage"
L
Linus Torvalds 已提交
577
	help
578 579 580
	  This option enables the compiler option -mwarn-dynamicstack. If the
	  compiler supports this options generates warnings for functions
	  that dynamically allocate stack space using alloca.
L
Linus Torvalds 已提交
581 582 583

	  Say N if you are unsure.

584
endmenu
585

586
menu "I/O subsystem"
L
Linus Torvalds 已提交
587 588

config QDIO
M
Martin Schwidefsky 已提交
589 590
	def_tristate y
	prompt "QDIO support"
L
Linus Torvalds 已提交
591
	---help---
592
	  This driver provides the Queued Direct I/O base support for
593
	  IBM System z.
L
Linus Torvalds 已提交
594 595 596 597 598 599

	  To compile this driver as a module, choose M here: the
	  module will be called qdio.

	  If unsure, say Y.

J
Jan Glauber 已提交
600 601 602
menuconfig PCI
	bool "PCI support"
	select PCI_MSI
603
	select IOMMU_SUPPORT
J
Jan Glauber 已提交
604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632
	help
	  Enable PCI support.

if PCI

config PCI_NR_FUNCTIONS
	int "Maximum number of PCI functions (1-4096)"
	range 1 4096
	default "64"
	help
	  This allows you to specify the maximum number of PCI functions which
	  this kernel will support.

source "drivers/pci/Kconfig"

endif	# PCI

config PCI_DOMAINS
	def_bool PCI

config HAS_IOMEM
	def_bool PCI

config IOMMU_HELPER
	def_bool PCI

config NEED_SG_DMA_LENGTH
	def_bool PCI

J
Jan Glauber 已提交
633 634 635
config NEED_DMA_MAP_STATE
	def_bool PCI

636
config CHSC_SCH
637
	def_tristate m
M
Martin Schwidefsky 已提交
638
	prompt "Support for CHSC subchannels"
639 640 641 642 643 644 645 646 647 648 649 650 651 652
	help
	  This driver allows usage of CHSC subchannels. A CHSC subchannel
	  is usually present on LPAR only.
	  The driver creates a device /dev/chsc, which may be used to
	  obtain I/O configuration information about the machine and
	  to issue asynchronous chsc commands (DANGEROUS).
	  You will usually only want to use this interface on a special
	  LPAR designated for system management.

	  To compile this driver as a module, choose M here: the
	  module will be called chsc_sch.

	  If unsure, say N.

S
Sebastian Ott 已提交
653 654 655 656 657 658
config SCM_BUS
	def_bool y
	prompt "SCM bus driver"
	help
	  Bus driver for Storage Class Memory.

659 660 661 662 663 664 665 666 667 668 669
config EADM_SCH
	def_tristate m
	prompt "Support for EADM subchannels"
	depends on SCM_BUS
	help
	  This driver allows usage of EADM subchannels. EADM subchannels act
	  as a communication vehicle for SCM increments.

	  To compile this driver as a module, choose M here: the
	  module will be called eadm_sch.

670 671 672 673 674 675
endmenu

menu "Dump support"

config CRASH_DUMP
	bool "kernel crash dumps"
H
Heiko Carstens 已提交
676
	depends on SMP
677 678 679 680 681 682 683
	select KEXEC
	help
	  Generate crash dump after being started by kexec.
	  Crash dump kernels are loaded in the main kernel with kexec-tools
	  into a specially reserved region and then later executed after
	  a crash by kdump/kexec.
	  Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this.
684 685
	  This option also enables s390 zfcpdump.
	  See also <file:Documentation/s390/zfcpdump.txt>
686 687 688 689

endmenu

menu "Executable file formats / Emulations"
L
Linus Torvalds 已提交
690 691 692

source "fs/Kconfig.binfmt"

693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714
config SECCOMP
	def_bool y
	prompt "Enable seccomp to safely compute untrusted bytecode"
	depends on PROC_FS
	help
	  This kernel feature is useful for number crunching applications
	  that may need to compute untrusted bytecode during their
	  execution. By using pipes or other transports made available to
	  the process as file descriptors supporting the read/write
	  syscalls, it's possible to isolate those applications in
	  their own address space using seccomp. Once seccomp is
	  enabled via /proc/<pid>/seccomp, it cannot be disabled
	  and the task is only allowed to execute a few safe syscalls
	  defined by each seccomp mode.

	  If unsure, say Y.

endmenu

menu "Power Management"

config ARCH_HIBERNATION_POSSIBLE
H
Heiko Carstens 已提交
715
	def_bool y
716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741

source "kernel/power/Kconfig"

endmenu

source "net/Kconfig"

config PCMCIA
	def_bool n

config CCW
	def_bool y

source "drivers/Kconfig"

source "fs/Kconfig"

source "arch/s390/Kconfig.debug"

source "security/Kconfig"

source "crypto/Kconfig"

source "lib/Kconfig"

menu "Virtualization"
H
Heiko Carstens 已提交
742

L
Linus Torvalds 已提交
743
config PFAULT
M
Martin Schwidefsky 已提交
744 745
	def_bool y
	prompt "Pseudo page fault support"
L
Linus Torvalds 已提交
746 747 748 749 750 751 752 753 754 755 756
	help
	  Select this option, if you want to use PFAULT pseudo page fault
	  handling under VM. If running native or in LPAR, this option
	  has no effect. If your VM does not support PFAULT, PAGEEX
	  pseudo page fault handling will be used.
	  Note that VM 4.2 supports PFAULT but has a bug in its
	  implementation that causes some problems.
	  Everybody who wants to run Linux under VM != VM4.2 should select
	  this option.

config SHARED_KERNEL
757 758
	bool "VM shared kernel support"
	depends on !JUMP_LABEL
L
Linus Torvalds 已提交
759 760 761 762
	help
	  Select this option, if you want to share the text segment of the
	  Linux kernel between different VM guests. This reduces memory
	  usage with lots of guests but greatly increases kernel size.
H
Heiko Carstens 已提交
763 764
	  Also if a kernel was IPL'ed from a shared segment the kexec system
	  call will not work.
L
Linus Torvalds 已提交
765 766 767 768
	  You should only select this option if you know what you are
	  doing and want to exploit this feature.

config CMM
M
Martin Schwidefsky 已提交
769 770
	def_tristate n
	prompt "Cooperative memory management"
L
Linus Torvalds 已提交
771 772 773 774 775 776 777 778 779 780 781
	help
	  Select this option, if you want to enable the kernel interface
	  to reduce the memory size of the system. This is accomplished
	  by allocating pages of memory and put them "on hold". This only
	  makes sense for a system running under VM where the unused pages
	  will be reused by VM for other guest systems. The interface
	  allows an external monitor to balance memory of many systems.
	  Everybody who wants to run Linux under VM should select this
	  option.

config CMM_IUCV
M
Martin Schwidefsky 已提交
782 783
	def_bool y
	prompt "IUCV special message interface to cooperative memory management"
L
Linus Torvalds 已提交
784 785 786 787 788 789
	depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
	help
	  Select this option to enable the special message interface to
	  the cooperative memory management.

config APPLDATA_BASE
M
Martin Schwidefsky 已提交
790 791
	def_bool n
	prompt "Linux - VM Monitor Stream, base infrastructure"
M
Martin Schwidefsky 已提交
792
	depends on PROC_FS
L
Linus Torvalds 已提交
793 794 795 796 797 798 799 800 801 802 803 804 805
	help
	  This provides a kernel interface for creating and updating z/VM APPLDATA
	  monitor records. The monitor records are updated at certain time
	  intervals, once the timer is started.
	  Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
	  i.e. enables or disables monitoring on the Linux side.
	  A custom interval value (in seconds) can be written to
	  /proc/appldata/interval.

	  Defaults are 60 seconds interval and timer off.
	  The /proc entries can also be read from, showing the current settings.

config APPLDATA_MEM
M
Martin Schwidefsky 已提交
806 807
	def_tristate m
	prompt "Monitor memory management statistics"
808
	depends on APPLDATA_BASE && VM_EVENT_COUNTERS
L
Linus Torvalds 已提交
809 810 811 812 813 814 815 816 817 818 819 820 821 822
	help
	  This provides memory management related data to the Linux - VM Monitor
	  Stream, like paging/swapping rate, memory utilisation, etc.
	  Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
	  APPLDATA monitor record, i.e. enables or disables monitoring this record
	  on the z/VM side.

	  Default is disabled.
	  The /proc entry can also be read from, showing the current settings.

	  This can also be compiled as a module, which will be called
	  appldata_mem.o.

config APPLDATA_OS
M
Martin Schwidefsky 已提交
823 824
	def_tristate m
	prompt "Monitor OS statistics"
L
Linus Torvalds 已提交
825 826 827 828 829 830 831 832 833 834 835 836 837
	depends on APPLDATA_BASE
	help
	  This provides OS related data to the Linux - VM Monitor Stream, like
	  CPU utilisation, etc.
	  Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
	  APPLDATA monitor record, i.e. enables or disables monitoring this record
	  on the z/VM side.

	  Default is disabled.
	  This can also be compiled as a module, which will be called
	  appldata_os.o.

config APPLDATA_NET_SUM
M
Martin Schwidefsky 已提交
838 839
	def_tristate m
	prompt "Monitor overall network statistics"
840
	depends on APPLDATA_BASE && NET
L
Linus Torvalds 已提交
841 842 843 844 845 846 847 848 849 850 851 852
	help
	  This provides network related data to the Linux - VM Monitor Stream,
	  currently there is only a total sum of network I/O statistics, no
	  per-interface data.
	  Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
	  APPLDATA monitor record, i.e. enables or disables monitoring this record
	  on the z/VM side.

	  Default is disabled.
	  This can also be compiled as a module, which will be called
	  appldata_net_sum.o.

M
Michael Holzheu 已提交
853
config S390_HYPFS_FS
M
Martin Schwidefsky 已提交
854 855
	def_bool y
	prompt "s390 hypervisor file system support"
M
Michael Holzheu 已提交
856 857 858 859 860
	select SYS_HYPERVISOR
	help
	  This is a virtual file system intended to provide accounting
	  information in an s390 hypervisor environment.

861
source "arch/s390/kvm/Kconfig"
M
Michael Holzheu 已提交
862

863
config S390_GUEST
M
Martin Schwidefsky 已提交
864
	def_bool y
865
	prompt "s390 support for virtio devices"
866
	select TTY
867
	select VIRTUALIZATION
868
	select VIRTIO
869
	select VIRTIO_CONSOLE
870
	help
871 872
	  Enabling this option adds support for virtio based paravirtual device
	  drivers on s390.
L
Linus Torvalds 已提交
873

874
	  Select this option if you want to run the kernel as a guest under
875
	  the KVM hypervisor.
876

877 878 879 880 881 882 883 884 885 886 887 888 889
config S390_GUEST_OLD_TRANSPORT
	def_bool y
	prompt "Guest support for old s390 virtio transport (DEPRECATED)"
	depends on S390_GUEST
	help
	  Enable this option to add support for the old s390-virtio
	  transport (i.e. virtio devices NOT based on virtio-ccw). This
	  type of virtio devices is only available on the experimental
	  kuli userspace or with old (< 2.6) qemu. If you are running
	  with a modern version of qemu (which supports virtio-ccw since
	  1.4 and uses it by default since version 2.4), you probably won't
	  need this.

890
endmenu