Kconfig 23 KB

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  1. config MMU
  2. def_bool y
  3. config ZONE_DMA
  4. def_bool y
  5. config CPU_BIG_ENDIAN
  6. def_bool y
  7. config LOCKDEP_SUPPORT
  8. def_bool y
  9. config STACKTRACE_SUPPORT
  10. def_bool y
  11. config RWSEM_GENERIC_SPINLOCK
  12. bool
  13. config RWSEM_XCHGADD_ALGORITHM
  14. def_bool y
  15. config ARCH_HAS_ILOG2_U32
  16. def_bool n
  17. config ARCH_HAS_ILOG2_U64
  18. def_bool n
  19. config GENERIC_HWEIGHT
  20. def_bool y
  21. config GENERIC_BUG
  22. def_bool y if BUG
  23. config GENERIC_BUG_RELATIVE_POINTERS
  24. def_bool y
  25. config ARCH_DMA_ADDR_T_64BIT
  26. def_bool y
  27. config GENERIC_LOCKBREAK
  28. def_bool y if SMP && PREEMPT
  29. config PGSTE
  30. def_bool y if KVM
  31. config ARCH_SUPPORTS_DEBUG_PAGEALLOC
  32. def_bool y
  33. config KEXEC
  34. def_bool y
  35. select KEXEC_CORE
  36. config AUDIT_ARCH
  37. def_bool y
  38. config NO_IOPORT_MAP
  39. def_bool y
  40. config PCI_QUIRKS
  41. def_bool n
  42. config ARCH_SUPPORTS_UPROBES
  43. def_bool y
  44. config DEBUG_RODATA
  45. def_bool y
  46. config S390
  47. def_bool y
  48. select ARCH_HAS_DEVMEM_IS_ALLOWED
  49. select ARCH_HAS_ELF_RANDOMIZE
  50. select ARCH_HAS_GCOV_PROFILE_ALL
  51. select ARCH_HAS_GIGANTIC_PAGE
  52. select ARCH_HAS_KCOV
  53. select ARCH_HAS_SG_CHAIN
  54. select ARCH_HAS_UBSAN_SANITIZE_ALL
  55. select ARCH_HAVE_NMI_SAFE_CMPXCHG
  56. select ARCH_INLINE_READ_LOCK
  57. select ARCH_INLINE_READ_LOCK_BH
  58. select ARCH_INLINE_READ_LOCK_IRQ
  59. select ARCH_INLINE_READ_LOCK_IRQSAVE
  60. select ARCH_INLINE_READ_TRYLOCK
  61. select ARCH_INLINE_READ_UNLOCK
  62. select ARCH_INLINE_READ_UNLOCK_BH
  63. select ARCH_INLINE_READ_UNLOCK_IRQ
  64. select ARCH_INLINE_READ_UNLOCK_IRQRESTORE
  65. select ARCH_INLINE_SPIN_LOCK
  66. select ARCH_INLINE_SPIN_LOCK_BH
  67. select ARCH_INLINE_SPIN_LOCK_IRQ
  68. select ARCH_INLINE_SPIN_LOCK_IRQSAVE
  69. select ARCH_INLINE_SPIN_TRYLOCK
  70. select ARCH_INLINE_SPIN_TRYLOCK_BH
  71. select ARCH_INLINE_SPIN_UNLOCK
  72. select ARCH_INLINE_SPIN_UNLOCK_BH
  73. select ARCH_INLINE_SPIN_UNLOCK_IRQ
  74. select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE
  75. select ARCH_INLINE_WRITE_LOCK
  76. select ARCH_INLINE_WRITE_LOCK_BH
  77. select ARCH_INLINE_WRITE_LOCK_IRQ
  78. select ARCH_INLINE_WRITE_LOCK_IRQSAVE
  79. select ARCH_INLINE_WRITE_TRYLOCK
  80. select ARCH_INLINE_WRITE_UNLOCK
  81. select ARCH_INLINE_WRITE_UNLOCK_BH
  82. select ARCH_INLINE_WRITE_UNLOCK_IRQ
  83. select ARCH_INLINE_WRITE_UNLOCK_IRQRESTORE
  84. select ARCH_SAVE_PAGE_KEYS if HIBERNATION
  85. select ARCH_SUPPORTS_ATOMIC_RMW
  86. select ARCH_SUPPORTS_NUMA_BALANCING
  87. select ARCH_USE_BUILTIN_BSWAP
  88. select ARCH_USE_CMPXCHG_LOCKREF
  89. select ARCH_WANTS_DYNAMIC_TASK_STRUCT
  90. select ARCH_WANTS_PROT_NUMA_PROT_NONE
  91. select ARCH_WANTS_UBSAN_NO_NULL
  92. select ARCH_WANT_IPC_PARSE_VERSION
  93. select BUILDTIME_EXTABLE_SORT
  94. select CLONE_BACKWARDS2
  95. select DYNAMIC_FTRACE if FUNCTION_TRACER
  96. select GENERIC_CLOCKEVENTS
  97. select GENERIC_CPU_AUTOPROBE
  98. select GENERIC_CPU_DEVICES if !SMP
  99. select GENERIC_FIND_FIRST_BIT
  100. select GENERIC_SMP_IDLE_THREAD
  101. select GENERIC_TIME_VSYSCALL
  102. select HAVE_ALIGNED_STRUCT_PAGE if SLUB
  103. select HAVE_ARCH_AUDITSYSCALL
  104. select HAVE_ARCH_EARLY_PFN_TO_NID
  105. select HAVE_ARCH_HARDENED_USERCOPY
  106. select HAVE_ARCH_JUMP_LABEL
  107. select CPU_NO_EFFICIENT_FFS if !HAVE_MARCH_Z9_109_FEATURES
  108. select HAVE_ARCH_SECCOMP_FILTER
  109. select HAVE_ARCH_SOFT_DIRTY
  110. select HAVE_ARCH_TRACEHOOK
  111. select HAVE_ARCH_TRANSPARENT_HUGEPAGE
  112. select HAVE_EBPF_JIT if PACK_STACK && HAVE_MARCH_Z196_FEATURES
  113. select HAVE_CMPXCHG_DOUBLE
  114. select HAVE_CMPXCHG_LOCAL
  115. select HAVE_DEBUG_KMEMLEAK
  116. select HAVE_DMA_API_DEBUG
  117. select HAVE_DYNAMIC_FTRACE
  118. select HAVE_DYNAMIC_FTRACE_WITH_REGS
  119. select HAVE_EFFICIENT_UNALIGNED_ACCESS
  120. select HAVE_EXIT_THREAD
  121. select HAVE_FTRACE_MCOUNT_RECORD
  122. select HAVE_FUNCTION_GRAPH_TRACER
  123. select HAVE_FUNCTION_TRACER
  124. select HAVE_FUTEX_CMPXCHG if FUTEX
  125. select HAVE_KERNEL_BZIP2
  126. select HAVE_KERNEL_GZIP
  127. select HAVE_KERNEL_LZ4
  128. select HAVE_KERNEL_LZMA
  129. select HAVE_KERNEL_LZO
  130. select HAVE_KERNEL_XZ
  131. select HAVE_KPROBES
  132. select HAVE_KRETPROBES
  133. select HAVE_KVM
  134. select HAVE_LIVEPATCH
  135. select HAVE_MEMBLOCK
  136. select HAVE_MEMBLOCK_NODE_MAP
  137. select HAVE_MEMBLOCK_PHYS_MAP
  138. select HAVE_MOD_ARCH_SPECIFIC
  139. select HAVE_OPROFILE
  140. select HAVE_PERF_EVENTS
  141. select HAVE_REGS_AND_STACK_ACCESS_API
  142. select HAVE_SYSCALL_TRACEPOINTS
  143. select HAVE_VIRT_CPU_ACCOUNTING
  144. select MODULES_USE_ELF_RELA
  145. select NO_BOOTMEM
  146. select OLD_SIGACTION
  147. select OLD_SIGSUSPEND3
  148. select SPARSE_IRQ
  149. select SYSCTL_EXCEPTION_TRACE
  150. select TTY
  151. select VIRT_CPU_ACCOUNTING
  152. select VIRT_TO_BUS
  153. select HAVE_NMI
  154. config SCHED_OMIT_FRAME_POINTER
  155. def_bool y
  156. config PGTABLE_LEVELS
  157. int
  158. default 4
  159. source "init/Kconfig"
  160. source "kernel/Kconfig.freezer"
  161. source "kernel/livepatch/Kconfig"
  162. menu "Processor type and features"
  163. config HAVE_MARCH_Z900_FEATURES
  164. def_bool n
  165. config HAVE_MARCH_Z990_FEATURES
  166. def_bool n
  167. select HAVE_MARCH_Z900_FEATURES
  168. config HAVE_MARCH_Z9_109_FEATURES
  169. def_bool n
  170. select HAVE_MARCH_Z990_FEATURES
  171. config HAVE_MARCH_Z10_FEATURES
  172. def_bool n
  173. select HAVE_MARCH_Z9_109_FEATURES
  174. config HAVE_MARCH_Z196_FEATURES
  175. def_bool n
  176. select HAVE_MARCH_Z10_FEATURES
  177. config HAVE_MARCH_ZEC12_FEATURES
  178. def_bool n
  179. select HAVE_MARCH_Z196_FEATURES
  180. config HAVE_MARCH_Z13_FEATURES
  181. def_bool n
  182. select HAVE_MARCH_ZEC12_FEATURES
  183. choice
  184. prompt "Processor type"
  185. default MARCH_Z196
  186. config MARCH_Z900
  187. bool "IBM zSeries model z800 and z900"
  188. select HAVE_MARCH_Z900_FEATURES
  189. help
  190. Select this to enable optimizations for model z800/z900 (2064 and
  191. 2066 series). This will enable some optimizations that are not
  192. available on older ESA/390 (31 Bit) only CPUs.
  193. config MARCH_Z990
  194. bool "IBM zSeries model z890 and z990"
  195. select HAVE_MARCH_Z990_FEATURES
  196. help
  197. Select this to enable optimizations for model z890/z990 (2084 and
  198. 2086 series). The kernel will be slightly faster but will not work
  199. on older machines.
  200. config MARCH_Z9_109
  201. bool "IBM System z9"
  202. select HAVE_MARCH_Z9_109_FEATURES
  203. help
  204. Select this to enable optimizations for IBM System z9 (2094 and
  205. 2096 series). The kernel will be slightly faster but will not work
  206. on older machines.
  207. config MARCH_Z10
  208. bool "IBM System z10"
  209. select HAVE_MARCH_Z10_FEATURES
  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. config MARCH_Z196
  215. bool "IBM zEnterprise 114 and 196"
  216. select HAVE_MARCH_Z196_FEATURES
  217. help
  218. Select this to enable optimizations for IBM zEnterprise 114 and 196
  219. (2818 and 2817 series). The kernel will be slightly faster but will
  220. not work on older machines.
  221. config MARCH_ZEC12
  222. bool "IBM zBC12 and zEC12"
  223. select HAVE_MARCH_ZEC12_FEATURES
  224. help
  225. Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and
  226. 2827 series). The kernel will be slightly faster but will not work on
  227. older machines.
  228. config MARCH_Z13
  229. bool "IBM z13s and z13"
  230. select HAVE_MARCH_Z13_FEATURES
  231. help
  232. Select this to enable optimizations for IBM z13s and z13 (2965 and
  233. 2964 series). The kernel will be slightly faster but will not work on
  234. older machines.
  235. endchoice
  236. config MARCH_Z900_TUNE
  237. def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT
  238. config MARCH_Z990_TUNE
  239. def_bool TUNE_Z990 || MARCH_Z990 && TUNE_DEFAULT
  240. config MARCH_Z9_109_TUNE
  241. def_bool TUNE_Z9_109 || MARCH_Z9_109 && TUNE_DEFAULT
  242. config MARCH_Z10_TUNE
  243. def_bool TUNE_Z10 || MARCH_Z10 && TUNE_DEFAULT
  244. config MARCH_Z196_TUNE
  245. def_bool TUNE_Z196 || MARCH_Z196 && TUNE_DEFAULT
  246. config MARCH_ZEC12_TUNE
  247. def_bool TUNE_ZEC12 || MARCH_ZEC12 && TUNE_DEFAULT
  248. config MARCH_Z13_TUNE
  249. def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT
  250. choice
  251. prompt "Tune code generation"
  252. default TUNE_DEFAULT
  253. help
  254. Cause the compiler to tune (-mtune) the generated code for a machine.
  255. This will make the code run faster on the selected machine but
  256. somewhat slower on other machines.
  257. This option only changes how the compiler emits instructions, not the
  258. selection of instructions itself, so the resulting kernel will run on
  259. all other machines.
  260. config TUNE_DEFAULT
  261. bool "Default"
  262. help
  263. Tune the generated code for the target processor for which the kernel
  264. will be compiled.
  265. config TUNE_Z900
  266. bool "IBM zSeries model z800 and z900"
  267. config TUNE_Z990
  268. bool "IBM zSeries model z890 and z990"
  269. config TUNE_Z9_109
  270. bool "IBM System z9"
  271. config TUNE_Z10
  272. bool "IBM System z10"
  273. config TUNE_Z196
  274. bool "IBM zEnterprise 114 and 196"
  275. config TUNE_ZEC12
  276. bool "IBM zBC12 and zEC12"
  277. config TUNE_Z13
  278. bool "IBM z13"
  279. endchoice
  280. config 64BIT
  281. def_bool y
  282. config COMPAT
  283. def_bool y
  284. prompt "Kernel support for 31 bit emulation"
  285. select COMPAT_BINFMT_ELF if BINFMT_ELF
  286. select ARCH_WANT_OLD_COMPAT_IPC
  287. select COMPAT_OLD_SIGACTION
  288. depends on MULTIUSER
  289. help
  290. Select this option if you want to enable your system kernel to
  291. handle system-calls from ELF binaries for 31 bit ESA. This option
  292. (and some other stuff like libraries and such) is needed for
  293. executing 31 bit applications. It is safe to say "Y".
  294. config SYSVIPC_COMPAT
  295. def_bool y if COMPAT && SYSVIPC
  296. config KEYS_COMPAT
  297. def_bool y if COMPAT && KEYS
  298. config SMP
  299. def_bool y
  300. prompt "Symmetric multi-processing support"
  301. ---help---
  302. This enables support for systems with more than one CPU. If you have
  303. a system with only one CPU, like most personal computers, say N. If
  304. you have a system with more than one CPU, say Y.
  305. If you say N here, the kernel will run on uni- and multiprocessor
  306. machines, but will use only one CPU of a multiprocessor machine. If
  307. you say Y here, the kernel will run on many, but not all,
  308. uniprocessor machines. On a uniprocessor machine, the kernel
  309. will run faster if you say N here.
  310. See also the SMP-HOWTO available at
  311. <http://www.tldp.org/docs.html#howto>.
  312. Even if you don't know what to do here, say Y.
  313. config NR_CPUS
  314. int "Maximum number of CPUs (2-512)"
  315. range 2 512
  316. depends on SMP
  317. default "64"
  318. help
  319. This allows you to specify the maximum number of CPUs which this
  320. kernel will support. The maximum supported value is 512 and the
  321. minimum value which makes sense is 2.
  322. This is purely to save memory - each supported CPU adds
  323. approximately sixteen kilobytes to the kernel image.
  324. config HOTPLUG_CPU
  325. def_bool y
  326. prompt "Support for hot-pluggable CPUs"
  327. depends on SMP
  328. help
  329. Say Y here to be able to turn CPUs off and on. CPUs
  330. can be controlled through /sys/devices/system/cpu/cpu#.
  331. Say N if you want to disable CPU hotplug.
  332. # Some NUMA nodes have memory ranges that span
  333. # other nodes. Even though a pfn is valid and
  334. # between a node's start and end pfns, it may not
  335. # reside on that node. See memmap_init_zone()
  336. # for details. <- They meant memory holes!
  337. config NODES_SPAN_OTHER_NODES
  338. def_bool NUMA
  339. config NUMA
  340. bool "NUMA support"
  341. depends on SMP && SCHED_TOPOLOGY
  342. default n
  343. help
  344. Enable NUMA support
  345. This option adds NUMA support to the kernel.
  346. An operation mode can be selected by appending
  347. numa=<method> to the kernel command line.
  348. The default behaviour is identical to appending numa=plain to
  349. the command line. This will create just one node with all
  350. available memory and all CPUs in it.
  351. config NODES_SHIFT
  352. int "Maximum NUMA nodes (as a power of 2)"
  353. range 1 10
  354. depends on NUMA
  355. default "4"
  356. help
  357. Specify the maximum number of NUMA nodes available on the target
  358. system. Increases memory reserved to accommodate various tables.
  359. menu "Select NUMA modes"
  360. depends on NUMA
  361. config NUMA_EMU
  362. bool "NUMA emulation"
  363. default y
  364. help
  365. Numa emulation mode will split the available system memory into
  366. equal chunks which then are distributed over the configured number
  367. of nodes in a round-robin manner.
  368. The number of fake nodes is limited by the number of available memory
  369. chunks (i.e. memory size / fake size) and the number of supported
  370. nodes in the kernel.
  371. The CPUs are assigned to the nodes in a way that partially respects
  372. the original machine topology (if supported by the machine).
  373. Fair distribution of the CPUs is not guaranteed.
  374. config EMU_SIZE
  375. hex "NUMA emulation memory chunk size"
  376. default 0x10000000
  377. range 0x400000 0x100000000
  378. depends on NUMA_EMU
  379. help
  380. Select the default size by which the memory is chopped and then
  381. assigned to emulated NUMA nodes.
  382. This can be overridden by specifying
  383. emu_size=<n>
  384. on the kernel command line where also suffixes K, M, G, and T are
  385. supported.
  386. endmenu
  387. config SCHED_SMT
  388. def_bool n
  389. config SCHED_MC
  390. def_bool n
  391. config SCHED_BOOK
  392. def_bool n
  393. config SCHED_DRAWER
  394. def_bool n
  395. config SCHED_TOPOLOGY
  396. def_bool y
  397. prompt "Topology scheduler support"
  398. depends on SMP
  399. select SCHED_SMT
  400. select SCHED_MC
  401. select SCHED_BOOK
  402. select SCHED_DRAWER
  403. help
  404. Topology scheduler support improves the CPU scheduler's decision
  405. making when dealing with machines that have multi-threading,
  406. multiple cores or multiple books.
  407. source kernel/Kconfig.preempt
  408. source kernel/Kconfig.hz
  409. endmenu
  410. menu "Memory setup"
  411. config ARCH_SPARSEMEM_ENABLE
  412. def_bool y
  413. select SPARSEMEM_VMEMMAP_ENABLE
  414. select SPARSEMEM_VMEMMAP
  415. config ARCH_SPARSEMEM_DEFAULT
  416. def_bool y
  417. config ARCH_SELECT_MEMORY_MODEL
  418. def_bool y
  419. config ARCH_ENABLE_MEMORY_HOTPLUG
  420. def_bool y if SPARSEMEM
  421. config ARCH_ENABLE_MEMORY_HOTREMOVE
  422. def_bool y
  423. config ARCH_ENABLE_SPLIT_PMD_PTLOCK
  424. def_bool y
  425. config FORCE_MAX_ZONEORDER
  426. int
  427. default "9"
  428. source "mm/Kconfig"
  429. config PACK_STACK
  430. def_bool y
  431. prompt "Pack kernel stack"
  432. help
  433. This option enables the compiler option -mkernel-backchain if it
  434. is available. If the option is available the compiler supports
  435. the new stack layout which dramatically reduces the minimum stack
  436. frame size. With an old compiler a non-leaf function needs a
  437. minimum of 96 bytes on 31 bit and 160 bytes on 64 bit. With
  438. -mkernel-backchain the minimum size drops to 16 byte on 31 bit
  439. and 24 byte on 64 bit.
  440. Say Y if you are unsure.
  441. config CHECK_STACK
  442. def_bool y
  443. prompt "Detect kernel stack overflow"
  444. help
  445. This option enables the compiler option -mstack-guard and
  446. -mstack-size if they are available. If the compiler supports them
  447. it will emit additional code to each function prolog to trigger
  448. an illegal operation if the kernel stack is about to overflow.
  449. Say N if you are unsure.
  450. config STACK_GUARD
  451. int "Size of the guard area (128-1024)"
  452. range 128 1024
  453. depends on CHECK_STACK
  454. default "256"
  455. help
  456. This allows you to specify the size of the guard area at the lower
  457. end of the kernel stack. If the kernel stack points into the guard
  458. area on function entry an illegal operation is triggered. The size
  459. needs to be a power of 2. Please keep in mind that the size of an
  460. interrupt frame is 184 bytes for 31 bit and 328 bytes on 64 bit.
  461. The minimum size for the stack guard should be 256 for 31 bit and
  462. 512 for 64 bit.
  463. config WARN_DYNAMIC_STACK
  464. def_bool n
  465. prompt "Emit compiler warnings for function with dynamic stack usage"
  466. help
  467. This option enables the compiler option -mwarn-dynamicstack. If the
  468. compiler supports this options generates warnings for functions
  469. that dynamically allocate stack space using alloca.
  470. Say N if you are unsure.
  471. endmenu
  472. menu "I/O subsystem"
  473. config QDIO
  474. def_tristate y
  475. prompt "QDIO support"
  476. ---help---
  477. This driver provides the Queued Direct I/O base support for
  478. IBM System z.
  479. To compile this driver as a module, choose M here: the
  480. module will be called qdio.
  481. If unsure, say Y.
  482. menuconfig PCI
  483. bool "PCI support"
  484. select PCI_MSI
  485. select IOMMU_SUPPORT
  486. help
  487. Enable PCI support.
  488. if PCI
  489. config PCI_NR_FUNCTIONS
  490. int "Maximum number of PCI functions (1-4096)"
  491. range 1 4096
  492. default "64"
  493. help
  494. This allows you to specify the maximum number of PCI functions which
  495. this kernel will support.
  496. source "drivers/pci/Kconfig"
  497. endif # PCI
  498. config PCI_DOMAINS
  499. def_bool PCI
  500. config HAS_IOMEM
  501. def_bool PCI
  502. config IOMMU_HELPER
  503. def_bool PCI
  504. config NEED_SG_DMA_LENGTH
  505. def_bool PCI
  506. config NEED_DMA_MAP_STATE
  507. def_bool PCI
  508. config CHSC_SCH
  509. def_tristate m
  510. prompt "Support for CHSC subchannels"
  511. help
  512. This driver allows usage of CHSC subchannels. A CHSC subchannel
  513. is usually present on LPAR only.
  514. The driver creates a device /dev/chsc, which may be used to
  515. obtain I/O configuration information about the machine and
  516. to issue asynchronous chsc commands (DANGEROUS).
  517. You will usually only want to use this interface on a special
  518. LPAR designated for system management.
  519. To compile this driver as a module, choose M here: the
  520. module will be called chsc_sch.
  521. If unsure, say N.
  522. config SCM_BUS
  523. def_bool y
  524. prompt "SCM bus driver"
  525. help
  526. Bus driver for Storage Class Memory.
  527. config EADM_SCH
  528. def_tristate m
  529. prompt "Support for EADM subchannels"
  530. depends on SCM_BUS
  531. help
  532. This driver allows usage of EADM subchannels. EADM subchannels act
  533. as a communication vehicle for SCM increments.
  534. To compile this driver as a module, choose M here: the
  535. module will be called eadm_sch.
  536. endmenu
  537. menu "Dump support"
  538. config CRASH_DUMP
  539. bool "kernel crash dumps"
  540. depends on SMP
  541. select KEXEC
  542. help
  543. Generate crash dump after being started by kexec.
  544. Crash dump kernels are loaded in the main kernel with kexec-tools
  545. into a specially reserved region and then later executed after
  546. a crash by kdump/kexec.
  547. Refer to <file:Documentation/s390/zfcpdump.txt> for more details on this.
  548. This option also enables s390 zfcpdump.
  549. See also <file:Documentation/s390/zfcpdump.txt>
  550. endmenu
  551. menu "Executable file formats / Emulations"
  552. source "fs/Kconfig.binfmt"
  553. config SECCOMP
  554. def_bool y
  555. prompt "Enable seccomp to safely compute untrusted bytecode"
  556. depends on PROC_FS
  557. help
  558. This kernel feature is useful for number crunching applications
  559. that may need to compute untrusted bytecode during their
  560. execution. By using pipes or other transports made available to
  561. the process as file descriptors supporting the read/write
  562. syscalls, it's possible to isolate those applications in
  563. their own address space using seccomp. Once seccomp is
  564. enabled via /proc/<pid>/seccomp, it cannot be disabled
  565. and the task is only allowed to execute a few safe syscalls
  566. defined by each seccomp mode.
  567. If unsure, say Y.
  568. endmenu
  569. menu "Power Management"
  570. config ARCH_HIBERNATION_POSSIBLE
  571. def_bool y
  572. source "kernel/power/Kconfig"
  573. endmenu
  574. source "net/Kconfig"
  575. config PCMCIA
  576. def_bool n
  577. config CCW
  578. def_bool y
  579. source "drivers/Kconfig"
  580. source "fs/Kconfig"
  581. source "arch/s390/Kconfig.debug"
  582. source "security/Kconfig"
  583. source "crypto/Kconfig"
  584. source "lib/Kconfig"
  585. menu "Virtualization"
  586. config PFAULT
  587. def_bool y
  588. prompt "Pseudo page fault support"
  589. help
  590. Select this option, if you want to use PFAULT pseudo page fault
  591. handling under VM. If running native or in LPAR, this option
  592. has no effect. If your VM does not support PFAULT, PAGEEX
  593. pseudo page fault handling will be used.
  594. Note that VM 4.2 supports PFAULT but has a bug in its
  595. implementation that causes some problems.
  596. Everybody who wants to run Linux under VM != VM4.2 should select
  597. this option.
  598. config SHARED_KERNEL
  599. bool "VM shared kernel support"
  600. depends on !JUMP_LABEL
  601. help
  602. Select this option, if you want to share the text segment of the
  603. Linux kernel between different VM guests. This reduces memory
  604. usage with lots of guests but greatly increases kernel size.
  605. Also if a kernel was IPL'ed from a shared segment the kexec system
  606. call will not work.
  607. You should only select this option if you know what you are
  608. doing and want to exploit this feature.
  609. config CMM
  610. def_tristate n
  611. prompt "Cooperative memory management"
  612. help
  613. Select this option, if you want to enable the kernel interface
  614. to reduce the memory size of the system. This is accomplished
  615. by allocating pages of memory and put them "on hold". This only
  616. makes sense for a system running under VM where the unused pages
  617. will be reused by VM for other guest systems. The interface
  618. allows an external monitor to balance memory of many systems.
  619. Everybody who wants to run Linux under VM should select this
  620. option.
  621. config CMM_IUCV
  622. def_bool y
  623. prompt "IUCV special message interface to cooperative memory management"
  624. depends on CMM && (SMSGIUCV=y || CMM=SMSGIUCV)
  625. help
  626. Select this option to enable the special message interface to
  627. the cooperative memory management.
  628. config APPLDATA_BASE
  629. def_bool n
  630. prompt "Linux - VM Monitor Stream, base infrastructure"
  631. depends on PROC_FS
  632. help
  633. This provides a kernel interface for creating and updating z/VM APPLDATA
  634. monitor records. The monitor records are updated at certain time
  635. intervals, once the timer is started.
  636. Writing 1 or 0 to /proc/appldata/timer starts(1) or stops(0) the timer,
  637. i.e. enables or disables monitoring on the Linux side.
  638. A custom interval value (in seconds) can be written to
  639. /proc/appldata/interval.
  640. Defaults are 60 seconds interval and timer off.
  641. The /proc entries can also be read from, showing the current settings.
  642. config APPLDATA_MEM
  643. def_tristate m
  644. prompt "Monitor memory management statistics"
  645. depends on APPLDATA_BASE && VM_EVENT_COUNTERS
  646. help
  647. This provides memory management related data to the Linux - VM Monitor
  648. Stream, like paging/swapping rate, memory utilisation, etc.
  649. Writing 1 or 0 to /proc/appldata/memory creates(1) or removes(0) a z/VM
  650. APPLDATA monitor record, i.e. enables or disables monitoring this record
  651. on the z/VM side.
  652. Default is disabled.
  653. The /proc entry can also be read from, showing the current settings.
  654. This can also be compiled as a module, which will be called
  655. appldata_mem.o.
  656. config APPLDATA_OS
  657. def_tristate m
  658. prompt "Monitor OS statistics"
  659. depends on APPLDATA_BASE
  660. help
  661. This provides OS related data to the Linux - VM Monitor Stream, like
  662. CPU utilisation, etc.
  663. Writing 1 or 0 to /proc/appldata/os creates(1) or removes(0) a z/VM
  664. APPLDATA monitor record, i.e. enables or disables monitoring this record
  665. on the z/VM side.
  666. Default is disabled.
  667. This can also be compiled as a module, which will be called
  668. appldata_os.o.
  669. config APPLDATA_NET_SUM
  670. def_tristate m
  671. prompt "Monitor overall network statistics"
  672. depends on APPLDATA_BASE && NET
  673. help
  674. This provides network related data to the Linux - VM Monitor Stream,
  675. currently there is only a total sum of network I/O statistics, no
  676. per-interface data.
  677. Writing 1 or 0 to /proc/appldata/net_sum creates(1) or removes(0) a z/VM
  678. APPLDATA monitor record, i.e. enables or disables monitoring this record
  679. on the z/VM side.
  680. Default is disabled.
  681. This can also be compiled as a module, which will be called
  682. appldata_net_sum.o.
  683. config S390_HYPFS_FS
  684. def_bool y
  685. prompt "s390 hypervisor file system support"
  686. select SYS_HYPERVISOR
  687. help
  688. This is a virtual file system intended to provide accounting
  689. information in an s390 hypervisor environment.
  690. source "arch/s390/kvm/Kconfig"
  691. config S390_GUEST
  692. def_bool y
  693. prompt "s390 support for virtio devices"
  694. select TTY
  695. select VIRTUALIZATION
  696. select VIRTIO
  697. select VIRTIO_CONSOLE
  698. help
  699. Enabling this option adds support for virtio based paravirtual device
  700. drivers on s390.
  701. Select this option if you want to run the kernel as a guest under
  702. the KVM hypervisor.
  703. config S390_GUEST_OLD_TRANSPORT
  704. def_bool y
  705. prompt "Guest support for old s390 virtio transport (DEPRECATED)"
  706. depends on S390_GUEST
  707. help
  708. Enable this option to add support for the old s390-virtio
  709. transport (i.e. virtio devices NOT based on virtio-ccw). This
  710. type of virtio devices is only available on the experimental
  711. kuli userspace or with old (< 2.6) qemu. If you are running
  712. with a modern version of qemu (which supports virtio-ccw since
  713. 1.4 and uses it by default since version 2.4), you probably won't
  714. need this.
  715. endmenu