Kconfig 17 KB

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  1. config SCHED_MC
  2. def_bool y
  3. depends on SMP
  4. config MMU
  5. def_bool y
  6. config ZONE_DMA
  7. def_bool y
  8. depends on 64BIT
  9. config LOCKDEP_SUPPORT
  10. def_bool y
  11. config STACKTRACE_SUPPORT
  12. def_bool y
  13. config HAVE_LATENCYTOP_SUPPORT
  14. def_bool y
  15. config RWSEM_GENERIC_SPINLOCK
  16. bool
  17. config RWSEM_XCHGADD_ALGORITHM
  18. def_bool y
  19. config ARCH_HAS_ILOG2_U32
  20. bool
  21. default n
  22. config ARCH_HAS_ILOG2_U64
  23. bool
  24. default n
  25. config GENERIC_HWEIGHT
  26. def_bool y
  27. config GENERIC_TIME
  28. def_bool y
  29. config GENERIC_TIME_VSYSCALL
  30. def_bool y
  31. config GENERIC_CLOCKEVENTS
  32. def_bool y
  33. config GENERIC_BUG
  34. bool
  35. depends on BUG
  36. default y
  37. config GENERIC_BUG_RELATIVE_POINTERS
  38. def_bool y
  39. config NO_IOMEM
  40. def_bool y
  41. config NO_DMA
  42. def_bool y
  43. config GENERIC_LOCKBREAK
  44. bool
  45. default y
  46. depends on SMP && PREEMPT
  47. config PGSTE
  48. bool
  49. default y if KVM
  50. config VIRT_CPU_ACCOUNTING
  51. def_bool y
  52. config ARCH_SUPPORTS_DEBUG_PAGEALLOC
  53. def_bool y
  54. config S390
  55. def_bool y
  56. select USE_GENERIC_SMP_HELPERS if SMP
  57. select HAVE_SYSCALL_WRAPPERS
  58. select HAVE_FUNCTION_TRACER
  59. select HAVE_FUNCTION_TRACE_MCOUNT_TEST
  60. select HAVE_FTRACE_MCOUNT_RECORD
  61. select HAVE_SYSCALL_TRACEPOINTS
  62. select HAVE_DYNAMIC_FTRACE
  63. select HAVE_FUNCTION_GRAPH_TRACER
  64. select HAVE_REGS_AND_STACK_ACCESS_API
  65. select HAVE_DEFAULT_NO_SPIN_MUTEXES
  66. select HAVE_OPROFILE
  67. select HAVE_KPROBES
  68. select HAVE_KRETPROBES
  69. select HAVE_KVM if 64BIT
  70. select HAVE_ARCH_TRACEHOOK
  71. select INIT_ALL_POSSIBLE
  72. select HAVE_PERF_EVENTS
  73. select HAVE_KERNEL_GZIP
  74. select HAVE_KERNEL_BZIP2
  75. select HAVE_KERNEL_LZMA
  76. select HAVE_KERNEL_LZO
  77. select ARCH_INLINE_SPIN_TRYLOCK
  78. select ARCH_INLINE_SPIN_TRYLOCK_BH
  79. select ARCH_INLINE_SPIN_LOCK
  80. select ARCH_INLINE_SPIN_LOCK_BH
  81. select ARCH_INLINE_SPIN_LOCK_IRQ
  82. select ARCH_INLINE_SPIN_LOCK_IRQSAVE
  83. select ARCH_INLINE_SPIN_UNLOCK
  84. select ARCH_INLINE_SPIN_UNLOCK_BH
  85. select ARCH_INLINE_SPIN_UNLOCK_IRQ
  86. select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE
  87. select ARCH_INLINE_READ_TRYLOCK
  88. select ARCH_INLINE_READ_LOCK
  89. select ARCH_INLINE_READ_LOCK_BH
  90. select ARCH_INLINE_READ_LOCK_IRQ
  91. select ARCH_INLINE_READ_LOCK_IRQSAVE
  92. select ARCH_INLINE_READ_UNLOCK
  93. select ARCH_INLINE_READ_UNLOCK_BH
  94. select ARCH_INLINE_READ_UNLOCK_IRQ
  95. select ARCH_INLINE_READ_UNLOCK_IRQRESTORE
  96. select ARCH_INLINE_WRITE_TRYLOCK
  97. select ARCH_INLINE_WRITE_LOCK
  98. select ARCH_INLINE_WRITE_LOCK_BH
  99. select ARCH_INLINE_WRITE_LOCK_IRQ
  100. select ARCH_INLINE_WRITE_LOCK_IRQSAVE
  101. select ARCH_INLINE_WRITE_UNLOCK
  102. select ARCH_INLINE_WRITE_UNLOCK_BH
  103. select ARCH_INLINE_WRITE_UNLOCK_IRQ
  104. select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
  105. config SCHED_OMIT_FRAME_POINTER
  106. bool
  107. default y
  108. source "init/Kconfig"
  109. source "kernel/Kconfig.freezer"
  110. menu "Base setup"
  111. comment "Processor type and features"
  112. source "kernel/time/Kconfig"
  113. config 64BIT
  114. bool "64 bit kernel"
  115. help
  116. Select this option if you have a 64 bit IBM zSeries machine
  117. and want to use the 64 bit addressing mode.
  118. config 32BIT
  119. bool
  120. default y if !64BIT
  121. config KTIME_SCALAR
  122. def_bool 32BIT
  123. config SMP
  124. bool "Symmetric multi-processing support"
  125. ---help---
  126. This enables support for systems with more than one CPU. If you have
  127. a system with only one CPU, like most personal computers, say N. If
  128. you have a system with more than one CPU, say Y.
  129. If you say N here, the kernel will run on single and multiprocessor
  130. machines, but will use only one CPU of a multiprocessor machine. If
  131. you say Y here, the kernel will run on many, but not all,
  132. singleprocessor machines. On a singleprocessor machine, the kernel
  133. will run faster if you say N here.
  134. See also the SMP-HOWTO available at
  135. <http://www.tldp.org/docs.html#howto>.
  136. Even if you don't know what to do here, say Y.
  137. config NR_CPUS
  138. int "Maximum number of CPUs (2-64)"
  139. range 2 64
  140. depends on SMP
  141. default "32" if !64BIT
  142. default "64" if 64BIT
  143. help
  144. This allows you to specify the maximum number of CPUs which this
  145. kernel will support. The maximum supported value is 64 and the
  146. minimum value which makes sense is 2.
  147. This is purely to save memory - each supported CPU adds
  148. approximately sixteen kilobytes to the kernel image.
  149. config HOTPLUG_CPU
  150. bool "Support for hot-pluggable CPUs"
  151. depends on SMP
  152. select HOTPLUG
  153. default n
  154. help
  155. Say Y here to be able to turn CPUs off and on. CPUs
  156. can be controlled through /sys/devices/system/cpu/cpu#.
  157. Say N if you want to disable CPU hotplug.
  158. config MATHEMU
  159. bool "IEEE FPU emulation"
  160. depends on MARCH_G5
  161. help
  162. This option is required for IEEE compliant floating point arithmetic
  163. on older S/390 machines. Say Y unless you know your machine doesn't
  164. need this.
  165. config COMPAT
  166. bool "Kernel support for 31 bit emulation"
  167. depends on 64BIT
  168. select COMPAT_BINFMT_ELF
  169. help
  170. Select this option if you want to enable your system kernel to
  171. handle system-calls from ELF binaries for 31 bit ESA. This option
  172. (and some other stuff like libraries and such) is needed for
  173. executing 31 bit applications. It is safe to say "Y".
  174. config SYSVIPC_COMPAT
  175. bool
  176. depends on COMPAT && SYSVIPC
  177. default y
  178. config AUDIT_ARCH
  179. bool
  180. default y
  181. config S390_EXEC_PROTECT
  182. bool "Data execute protection"
  183. help
  184. This option allows to enable a buffer overflow protection for user
  185. space programs and it also selects the addressing mode option above.
  186. The kernel parameter noexec=on will enable this feature and also
  187. switch the addressing modes, default is disabled. Enabling this (via
  188. kernel parameter) on machines earlier than IBM System z9-109 EC/BC
  189. will reduce system performance.
  190. comment "Code generation options"
  191. choice
  192. prompt "Processor type"
  193. default MARCH_G5
  194. config MARCH_G5
  195. bool "S/390 model G5 and G6"
  196. depends on !64BIT
  197. help
  198. Select this to build a 31 bit kernel that works
  199. on all S/390 and zSeries machines.
  200. config MARCH_Z900
  201. bool "IBM eServer zSeries model z800 and z900"
  202. help
  203. Select this to optimize for zSeries machines. This
  204. will enable some optimizations that are not available
  205. on older 31 bit only CPUs.
  206. config MARCH_Z990
  207. bool "IBM eServer zSeries model z890 and z990"
  208. help
  209. Select this enable optimizations for model z890/z990.
  210. This will be slightly faster but does not work on
  211. older machines such as the z900.
  212. config MARCH_Z9_109
  213. bool "IBM System z9"
  214. help
  215. Select this to enable optimizations for IBM System z9-109, IBM
  216. System z9 Enterprise Class (z9 EC), and IBM System z9 Business
  217. Class (z9 BC). The kernel will be slightly faster but will not
  218. work on older machines such as the z990, z890, z900, and z800.
  219. config MARCH_Z10
  220. bool "IBM System z10"
  221. help
  222. Select this to enable optimizations for IBM System z10. The
  223. kernel will be slightly faster but will not work on older
  224. machines such as the z990, z890, z900, z800, z9-109, z9-ec
  225. and z9-bc.
  226. endchoice
  227. config PACK_STACK
  228. bool "Pack kernel stack"
  229. help
  230. This option enables the compiler option -mkernel-backchain if it
  231. is available. If the option is available the compiler supports
  232. the new stack layout which dramatically reduces the minimum stack
  233. frame size. With an old compiler a non-leaf function needs a
  234. minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With
  235. -mkernel-backchain the minimum size drops to 16 byte on 31 bit
  236. and 24 byte on 64 bit.
  237. Say Y if you are unsure.
  238. config SMALL_STACK
  239. bool "Use 8kb for kernel stack instead of 16kb"
  240. depends on PACK_STACK && 64BIT && !LOCKDEP
  241. help
  242. If you say Y here and the compiler supports the -mkernel-backchain
  243. option the kernel will use a smaller kernel stack size. The reduced
  244. size is 8kb instead of 16kb. This allows to run more threads on a
  245. system and reduces the pressure on the memory management for higher
  246. order page allocations.
  247. Say N if you are unsure.
  248. config CHECK_STACK
  249. bool "Detect kernel stack overflow"
  250. help
  251. This option enables the compiler option -mstack-guard and
  252. -mstack-size if they are available. If the compiler supports them
  253. it will emit additional code to each function prolog to trigger
  254. an illegal operation if the kernel stack is about to overflow.
  255. Say N if you are unsure.
  256. config STACK_GUARD
  257. int "Size of the guard area (128-1024)"
  258. range 128 1024
  259. depends on CHECK_STACK
  260. default "256"
  261. help
  262. This allows you to specify the size of the guard area at the lower
  263. end of the kernel stack. If the kernel stack points into the guard
  264. area on function entry an illegal operation is triggered. The size
  265. needs to be a power of 2. Please keep in mind that the size of an
  266. interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
  267. The minimum size for the stack guard should be 256 for 31 bit and
  268. 512 for 64 bit.
  269. config WARN_STACK
  270. bool "Emit compiler warnings for function with broken stack usage"
  271. help
  272. This option enables the compiler options -mwarn-framesize and
  273. -mwarn-dynamicstack. If the compiler supports these options it
  274. will generate warnings for function which either use alloca or
  275. create a stack frame bigger than CONFIG_WARN_STACK_SIZE.
  276. Say N if you are unsure.
  277. config WARN_STACK_SIZE
  278. int "Maximum frame size considered safe (128-2048)"
  279. range 128 2048
  280. depends on WARN_STACK
  281. default "2048"
  282. help
  283. This allows you to specify the maximum frame size a function may
  284. have without the compiler complaining about it.
  285. config ARCH_POPULATES_NODE_MAP
  286. def_bool y
  287. comment "Kernel preemption"
  288. source "kernel/Kconfig.preempt"
  289. config ARCH_SPARSEMEM_ENABLE
  290. def_bool y
  291. select SPARSEMEM_VMEMMAP_ENABLE
  292. select SPARSEMEM_VMEMMAP
  293. select SPARSEMEM_STATIC if !64BIT
  294. config ARCH_SPARSEMEM_DEFAULT
  295. def_bool y
  296. config ARCH_SELECT_MEMORY_MODEL
  297. def_bool y
  298. config ARCH_ENABLE_MEMORY_HOTPLUG
  299. def_bool y
  300. depends on SPARSEMEM
  301. config ARCH_ENABLE_MEMORY_HOTREMOVE
  302. def_bool y
  303. config ARCH_HIBERNATION_POSSIBLE
  304. def_bool y if 64BIT
  305. source "mm/Kconfig"
  306. comment "I/O subsystem configuration"
  307. config QDIO
  308. tristate "QDIO support"
  309. ---help---
  310. This driver provides the Queued Direct I/O base support for
  311. IBM System z.
  312. To compile this driver as a module, choose M here: the
  313. module will be called qdio.
  314. If unsure, say Y.
  315. config CHSC_SCH
  316. tristate "Support for CHSC subchannels"
  317. help
  318. This driver allows usage of CHSC subchannels. A CHSC subchannel
  319. is usually present on LPAR only.
  320. The driver creates a device /dev/chsc, which may be used to
  321. obtain I/O configuration information about the machine and
  322. to issue asynchronous chsc commands (DANGEROUS).
  323. You will usually only want to use this interface on a special
  324. LPAR designated for system management.
  325. To compile this driver as a module, choose M here: the
  326. module will be called chsc_sch.
  327. If unsure, say N.
  328. comment "Misc"
  329. config IPL
  330. bool "Builtin IPL record support"
  331. help
  332. If you want to use the produced kernel to IPL directly from a
  333. device, you have to merge a bootsector specific to the device
  334. into the first bytes of the kernel. You will have to select the
  335. IPL device.
  336. choice
  337. prompt "IPL method generated into head.S"
  338. depends on IPL
  339. default IPL_VM
  340. help
  341. Select "tape" if you want to IPL the image from a Tape.
  342. Select "vm_reader" if you are running under VM/ESA and want
  343. to IPL the image from the emulated card reader.
  344. config IPL_TAPE
  345. bool "tape"
  346. config IPL_VM
  347. bool "vm_reader"
  348. endchoice
  349. source "fs/Kconfig.binfmt"
  350. config FORCE_MAX_ZONEORDER
  351. int
  352. default "9"
  353. config PFAULT
  354. bool "Pseudo page fault support"
  355. help
  356. Select this option, if you want to use PFAULT pseudo page fault
  357. handling under VM. If running native or in LPAR, this option
  358. has no effect. If your VM does not support PFAULT, PAGEEX
  359. pseudo page fault handling will be used.
  360. Note that VM 4.2 supports PFAULT but has a bug in its
  361. implementation that causes some problems.
  362. Everybody who wants to run Linux under VM != VM4.2 should select
  363. this option.
  364. config SHARED_KERNEL
  365. bool "VM shared kernel support"
  366. help
  367. Select this option, if you want to share the text segment of the
  368. Linux kernel between different VM guests. This reduces memory
  369. usage with lots of guests but greatly increases kernel size.
  370. Also if a kernel was IPL'ed from a shared segment the kexec system
  371. call will not work.
  372. You should only select this option if you know what you are
  373. doing and want to exploit this feature.
  374. config CMM
  375. tristate "Cooperative memory management"
  376. help
  377. Select this option, if you want to enable the kernel interface
  378. to reduce the memory size of the system. This is accomplished
  379. by allocating pages of memory and put them "on hold". This only
  380. makes sense for a system running under VM where the unused pages
  381. will be reused by VM for other guest systems. The interface
  382. allows an external monitor to balance memory of many systems.
  383. Everybody who wants to run Linux under VM should select this
  384. option.
  385. config CMM_IUCV
  386. bool "IUCV special message interface to cooperative memory management"
  387. depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
  388. help
  389. Select this option to enable the special message interface to
  390. the cooperative memory management.
  391. config APPLDATA_BASE
  392. bool "Linux - VM Monitor Stream, base infrastructure"
  393. depends on PROC_FS
  394. help
  395. This provides a kernel interface for creating and updating z/VM APPLDATA
  396. monitor records. The monitor records are updated at certain time
  397. intervals, once the timer is started.
  398. Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
  399. i.e. enables or disables monitoring on the Linux side.
  400. A custom interval value (in seconds) can be written to
  401. /proc/appldata/interval.
  402. Defaults are 60 seconds interval and timer off.
  403. The /proc entries can also be read from, showing the current settings.
  404. config APPLDATA_MEM
  405. tristate "Monitor memory management statistics"
  406. depends on APPLDATA_BASE && VM_EVENT_COUNTERS
  407. help
  408. This provides memory management related data to the Linux - VM Monitor
  409. Stream, like paging/swapping rate, memory utilisation, etc.
  410. Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
  411. APPLDATA monitor record, i.e. enables or disables monitoring this record
  412. on the z/VM side.
  413. Default is disabled.
  414. The /proc entry can also be read from, showing the current settings.
  415. This can also be compiled as a module, which will be called
  416. appldata_mem.o.
  417. config APPLDATA_OS
  418. tristate "Monitor OS statistics"
  419. depends on APPLDATA_BASE
  420. help
  421. This provides OS related data to the Linux - VM Monitor Stream, like
  422. CPU utilisation, etc.
  423. Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
  424. APPLDATA monitor record, i.e. enables or disables monitoring this record
  425. on the z/VM side.
  426. Default is disabled.
  427. This can also be compiled as a module, which will be called
  428. appldata_os.o.
  429. config APPLDATA_NET_SUM
  430. tristate "Monitor overall network statistics"
  431. depends on APPLDATA_BASE && NET
  432. help
  433. This provides network related data to the Linux - VM Monitor Stream,
  434. currently there is only a total sum of network I/O statistics, no
  435. per-interface data.
  436. Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
  437. APPLDATA monitor record, i.e. enables or disables monitoring this record
  438. on the z/VM side.
  439. Default is disabled.
  440. This can also be compiled as a module, which will be called
  441. appldata_net_sum.o.
  442. source kernel/Kconfig.hz
  443. config S390_HYPFS_FS
  444. bool "s390 hypervisor file system support"
  445. select SYS_HYPERVISOR
  446. default y
  447. help
  448. This is a virtual file system intended to provide accounting
  449. information in an s390 hypervisor environment.
  450. config KEXEC
  451. bool "kexec system call"
  452. help
  453. kexec is a system call that implements the ability to shutdown your
  454. current kernel, and to start another kernel. It is like a reboot
  455. but is independent of hardware/microcode support.
  456. config ZFCPDUMP
  457. bool "zfcpdump support"
  458. select SMP
  459. default n
  460. help
  461. Select this option if you want to build an zfcpdump enabled kernel.
  462. Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this.
  463. config S390_GUEST
  464. bool "s390 guest support for KVM (EXPERIMENTAL)"
  465. depends on 64BIT && EXPERIMENTAL
  466. select VIRTIO
  467. select VIRTIO_RING
  468. select VIRTIO_CONSOLE
  469. help
  470. Select this option if you want to run the kernel as a guest under
  471. the KVM hypervisor. This will add detection for KVM as well as a
  472. virtio transport. If KVM is detected, the virtio console will be
  473. the default console.
  474. config SECCOMP
  475. bool "Enable seccomp to safely compute untrusted bytecode"
  476. depends on PROC_FS
  477. default y
  478. help
  479. This kernel feature is useful for number crunching applications
  480. that may need to compute untrusted bytecode during their
  481. execution. By using pipes or other transports made available to
  482. the process as file descriptors supporting the read/write
  483. syscalls, it's possible to isolate those applications in
  484. their own address space using seccomp. Once seccomp is
  485. enabled via /proc/<pid>/seccomp, it cannot be disabled
  486. and the task is only allowed to execute a few safe syscalls
  487. defined by each seccomp mode.
  488. If unsure, say Y.
  489. endmenu
  490. menu "Power Management"
  491. source "kernel/power/Kconfig"
  492. endmenu
  493. source "net/Kconfig"
  494. config PCMCIA
  495. def_bool n
  496. config CCW
  497. def_bool y
  498. source "drivers/Kconfig"
  499. source "fs/Kconfig"
  500. source "arch/s390/Kconfig.debug"
  501. source "security/Kconfig"
  502. source "crypto/Kconfig"
  503. source "lib/Kconfig"
  504. source "arch/s390/kvm/Kconfig"