config/Config-kernel.in

   1 # SPDX-License-Identifier: GPL-2.0-only
   2 #
   3 # Copyright (C) 2006-2014 OpenWrt.org
   4
   5 config KERNEL_BUILD_USER
   6         string "Custom Kernel Build User Name"
   7         default "builder" if BUILDBOT
   8         default ""
   9         help
  10           Sets the Kernel build user string, which for example will be returned
  11           by 'uname -a' on running systems.
  12           If not set, uses system user at build time.
  13
  14 config KERNEL_BUILD_DOMAIN
  15         string "Custom Kernel Build Domain Name"
  16         default "buildhost" if BUILDBOT
  17         default ""
  18         help
  19           Sets the Kernel build domain string, which for example will be
  20           returned by 'uname -a' on running systems.
  21           If not set, uses system hostname at build time.
  22
  23 config KERNEL_PRINTK
  24         bool "Enable support for printk"
  25         default y
  26
  27 config KERNEL_SWAP
  28         bool "Support for paging of anonymous memory (swap)"
  29         default y if !SMALL_FLASH
  30
  31 config KERNEL_PROC_STRIPPED
  32         bool "Strip non-essential /proc functionality to reduce code size"
  33         default y if SMALL_FLASH
  34
  35 config KERNEL_DEBUG_FS
  36         bool "Compile the kernel with debug filesystem enabled"
  37         default y
  38         help
  39           debugfs is a virtual file system that kernel developers use to put
  40           debugging files into. Enable this option to be able to read and
  41           write to these files. Many common debugging facilities, such as
  42           ftrace, require the existence of debugfs.
  43
  44 config KERNEL_MIPS_FP_SUPPORT
  45         bool
  46         default y if TARGET_pistachio
  47
  48 config KERNEL_ARM_PMU
  49         bool
  50         depends on (arm || aarch64)
  51
  52 config KERNEL_X86_VSYSCALL_EMULATION
  53         bool "Enable vsyscall emulation"
  54         depends on x86_64
  55         help
  56           This enables emulation of the legacy vsyscall page.  Disabling
  57           it is roughly equivalent to booting with vsyscall=none, except
  58           that it will also disable the helpful warning if a program
  59           tries to use a vsyscall.  With this option set to N, offending
  60           programs will just segfault, citing addresses of the form
  61           0xffffffffff600?00.
  62
  63           This option is required by many programs built before 2013, and
  64           care should be used even with newer programs if set to N.
  65
  66           Disabling this option saves about 7K of kernel size and
  67           possibly 4K of additional runtime pagetable memory.
  68
  69 config KERNEL_PERF_EVENTS
  70         bool "Compile the kernel with performance events and counters"
  71         select KERNEL_ARM_PMU if (arm || aarch64)
  72
  73 config KERNEL_PROFILING
  74         bool "Compile the kernel with profiling enabled"
  75         select KERNEL_PERF_EVENTS
  76         help
  77           Enable the extended profiling support mechanisms used by profilers such
  78           as OProfile.
  79
  80 config KERNEL_RPI_AXIPERF
  81         bool "Compile the kernel with RaspberryPi AXI Performance monitors"
  82         default y
  83         depends on KERNEL_PERF_EVENTS && TARGET_bcm27xx
  84
  85 config KERNEL_UBSAN
  86         bool "Compile the kernel with undefined behaviour sanity checker"
  87         help
  88           This option enables undefined behaviour sanity checker
  89           Compile-time instrumentation is used to detect various undefined
  90           behaviours in runtime. Various types of checks may be enabled
  91           via boot parameter ubsan_handle
  92           (see: Documentation/dev-tools/ubsan.rst).
  93
  94 config KERNEL_UBSAN_SANITIZE_ALL
  95         bool "Enable instrumentation for the entire kernel"
  96         depends on KERNEL_UBSAN
  97         default y
  98         help
  99           This option activates instrumentation for the entire kernel.
 100           If you don't enable this option, you have to explicitly specify
 101           UBSAN_SANITIZE := y for the files/directories you want to check for UB.
 102           Enabling this option will get kernel image size increased
 103           significantly.
 104
 105 config KERNEL_UBSAN_ALIGNMENT
 106         bool "Enable checking of pointers alignment"
 107         depends on KERNEL_UBSAN
 108         help
 109           This option enables detection of unaligned memory accesses.
 110           Enabling this option on architectures that support unaligned
 111           accesses may produce a lot of false positives.
 112
 113 config KERNEL_UBSAN_BOUNDS
 114         bool "Perform array index bounds checking"
 115         depends on KERNEL_UBSAN
 116         help
 117           This option enables detection of directly indexed out of bounds array
 118           accesses, where the array size is known at compile time. Note that
 119           this does not protect array overflows via bad calls to the
 120           {str,mem}*cpy() family of functions (that is addressed by
 121           FORTIFY_SOURCE).
 122
 123 config KERNEL_UBSAN_NULL
 124         bool "Enable checking of null pointers"
 125         depends on KERNEL_UBSAN
 126         help
 127           This option enables detection of memory accesses via a
 128           null pointer.
 129
 130 config KERNEL_UBSAN_TRAP
 131         bool "On Sanitizer warnings, abort the running kernel code"
 132         depends on KERNEL_UBSAN
 133         help
 134           Building kernels with Sanitizer features enabled tends to grow the
 135           kernel size by around 5%, due to adding all the debugging text on
 136           failure paths. To avoid this, Sanitizer instrumentation can just
 137           issue a trap. This reduces the kernel size overhead but turns all
 138           warnings (including potentially harmless conditions) into full
 139           exceptions that abort the running kernel code (regardless of context,
 140           locks held, etc), which may destabilize the system. For some system
 141           builders this is an acceptable trade-off.
 142
 143 config KERNEL_KASAN
 144         bool "Compile the kernel with KASan: runtime memory debugger"
 145         select KERNEL_SLUB_DEBUG
 146         depends on (x86_64 || aarch64)
 147         help
 148           Enables kernel address sanitizer - runtime memory debugger,
 149           designed to find out-of-bounds accesses and use-after-free bugs.
 150           This is strictly a debugging feature and it requires a gcc version
 151           of 4.9.2 or later. Detection of out of bounds accesses to stack or
 152           global variables requires gcc 5.0 or later.
 153           This feature consumes about 1/8 of available memory and brings about
 154           ~x3 performance slowdown.
 155           For better error detection enable CONFIG_STACKTRACE.
 156           Currently CONFIG_KASAN doesn't work with CONFIG_DEBUG_SLAB
 157           (the resulting kernel does not boot).
 158
 159 config KERNEL_KASAN_EXTRA
 160         bool "KAsan: extra checks"
 161         depends on KERNEL_KASAN && KERNEL_DEBUG_KERNEL
 162         help
 163           This enables further checks in the kernel address sanitizer, for now
 164           it only includes the address-use-after-scope check that can lead
 165           to excessive kernel stack usage, frame size warnings and longer
 166           compile time.
 167           https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81715 has more
 168
 169 config KERNEL_KASAN_VMALLOC
 170         bool "Back mappings in vmalloc space with real shadow memory"
 171         depends on KERNEL_KASAN
 172         help
 173           By default, the shadow region for vmalloc space is the read-only
 174           zero page. This means that KASAN cannot detect errors involving
 175           vmalloc space.
 176
 177           Enabling this option will hook in to vmap/vmalloc and back those
 178           mappings with real shadow memory allocated on demand. This allows
 179           for KASAN to detect more sorts of errors (and to support vmapped
 180           stacks), but at the cost of higher memory usage.
 181
 182           This option depends on HAVE_ARCH_KASAN_VMALLOC, but we can't
 183           depend on that in here, so it is possible that enabling this
 184           will have no effect.
 185
 186 if KERNEL_KASAN
 187         config KERNEL_KASAN_GENERIC
 188         def_bool y
 189
 190         config KERNEL_KASAN_SW_TAGS
 191         def_bool n
 192 endif
 193
 194 choice
 195         prompt "Instrumentation type"
 196         depends on KERNEL_KASAN
 197         default KERNEL_KASAN_OUTLINE
 198
 199 config KERNEL_KASAN_OUTLINE
 200         bool "Outline instrumentation"
 201         help
 202           Before every memory access compiler insert function call
 203           __asan_load*/__asan_store*. These functions performs check
 204           of shadow memory. This is slower than inline instrumentation,
 205           however it doesn't bloat size of kernel's .text section so
 206           much as inline does.
 207
 208 config KERNEL_KASAN_INLINE
 209         bool "Inline instrumentation"
 210         help
 211           Compiler directly inserts code checking shadow memory before
 212           memory accesses. This is faster than outline (in some workloads
 213           it gives about x2 boost over outline instrumentation), but
 214           make kernel's .text size much bigger.
 215           This requires a gcc version of 5.0 or later.
 216
 217 endchoice
 218
 219 config KERNEL_KCOV
 220         bool "Compile the kernel with code coverage for fuzzing"
 221         select KERNEL_DEBUG_FS
 222         help
 223           KCOV exposes kernel code coverage information in a form suitable
 224           for coverage-guided fuzzing (randomized testing).
 225
 226           If RANDOMIZE_BASE is enabled, PC values will not be stable across
 227           different machines and across reboots. If you need stable PC values,
 228           disable RANDOMIZE_BASE.
 229
 230           For more details, see Documentation/kcov.txt.
 231
 232 config KERNEL_KCOV_ENABLE_COMPARISONS
 233         bool "Enable comparison operands collection by KCOV"
 234         depends on KERNEL_KCOV
 235         help
 236           KCOV also exposes operands of every comparison in the instrumented
 237           code along with operand sizes and PCs of the comparison instructions.
 238           These operands can be used by fuzzing engines to improve the quality
 239           of fuzzing coverage.
 240
 241 config KERNEL_KCOV_INSTRUMENT_ALL
 242         bool "Instrument all code by default"
 243         depends on KERNEL_KCOV
 244         default y if KERNEL_KCOV
 245         help
 246           If you are doing generic system call fuzzing (like e.g. syzkaller),
 247           then you will want to instrument the whole kernel and you should
 248           say y here. If you are doing more targeted fuzzing (like e.g.
 249           filesystem fuzzing with AFL) then you will want to enable coverage
 250           for more specific subsets of files, and should say n here.
 251
 252 config KERNEL_TASKSTATS
 253         bool "Compile the kernel with task resource/io statistics and accounting"
 254         help
 255           Enable the collection and publishing of task/io statistics and
 256           accounting.  Enable this option to enable i/o monitoring in system
 257           monitors.
 258
 259 if KERNEL_TASKSTATS
 260
 261         config KERNEL_TASK_DELAY_ACCT
 262                 def_bool y
 263
 264         config KERNEL_TASK_IO_ACCOUNTING
 265                 def_bool y
 266
 267         config KERNEL_TASK_XACCT
 268                 def_bool y
 269
 270 endif
 271
 272 config KERNEL_KALLSYMS
 273         bool "Compile the kernel with symbol table information"
 274         default y if !SMALL_FLASH
 275         help
 276           This will give you more information in stack traces from kernel oopses.
 277
 278 config KERNEL_FTRACE
 279         bool "Compile the kernel with tracing support"
 280         depends on !TARGET_uml
 281
 282 config KERNEL_FTRACE_SYSCALLS
 283         bool "Trace system calls"
 284         depends on KERNEL_FTRACE
 285
 286 config KERNEL_ENABLE_DEFAULT_TRACERS
 287         bool "Trace process context switches and events"
 288         depends on KERNEL_FTRACE
 289
 290 config KERNEL_FUNCTION_TRACER
 291         bool "Function tracer"
 292         depends on KERNEL_FTRACE
 293
 294 config KERNEL_FUNCTION_GRAPH_TRACER
 295         bool "Function graph tracer"
 296         depends on KERNEL_FUNCTION_TRACER
 297
 298 config KERNEL_DYNAMIC_FTRACE
 299         bool "Enable/disable function tracing dynamically"
 300         depends on KERNEL_FUNCTION_TRACER
 301
 302 config KERNEL_FUNCTION_PROFILER
 303         bool "Function profiler"
 304         depends on KERNEL_FUNCTION_TRACER
 305
 306 config KERNEL_IRQSOFF_TRACER
 307         bool "Interrupts-off Latency Tracer"
 308         depends on KERNEL_FTRACE
 309         help
 310           This option measures the time spent in irqs-off critical
 311           sections, with microsecond accuracy.
 312
 313           The default measurement method is a maximum search, which is
 314           disabled by default and can be runtime (re-)started
 315           via:
 316
 317               echo 0 > /sys/kernel/debug/tracing/tracing_max_latency
 318
 319           (Note that kernel size and overhead increase with this option
 320           enabled. This option and the preempt-off timing option can be
 321           used together or separately.)
 322
 323 config KERNEL_PREEMPT_TRACER
 324         bool "Preemption-off Latency Tracer"
 325         depends on KERNEL_FTRACE
 326         help
 327           This option measures the time spent in preemption-off critical
 328           sections, with microsecond accuracy.
 329
 330           The default measurement method is a maximum search, which is
 331           disabled by default and can be runtime (re-)started
 332           via:
 333
 334               echo 0 > /sys/kernel/debug/tracing/tracing_max_latency
 335
 336           (Note that kernel size and overhead increase with this option
 337           enabled. This option and the irqs-off timing option can be
 338           used together or separately.)
 339
 340 config KERNEL_HIST_TRIGGERS
 341         bool "Histogram triggers"
 342         depends on KERNEL_FTRACE
 343         help
 344           Hist triggers allow one or more arbitrary trace event fields to be
 345           aggregated into hash tables and dumped to stdout by reading a
 346           debugfs/tracefs file. They're useful for gathering quick and dirty
 347           (though precise) summaries of event activity as an initial guide for
 348           further investigation using more advanced tools.
 349
 350           Inter-event tracing of quantities such as latencies is also
 351           supported using hist triggers under this option.
 352
 353 config KERNEL_DEBUG_KERNEL
 354         bool
 355
 356 config KERNEL_DEBUG_INFO
 357         bool "Compile the kernel with debug information"
 358         default y if !SMALL_FLASH
 359         select KERNEL_DEBUG_KERNEL
 360         help
 361           This will compile your kernel and modules with debug information.
 362
 363 config KERNEL_DEBUG_INFO_BTF
 364
 365         bool "Enable additional BTF type information"
 366         depends on !HOST_OS_MACOS
 367         depends on KERNEL_DEBUG_INFO && !KERNEL_DEBUG_INFO_REDUCED
 368         select DWARVES
 369         help
 370           Generate BPF Type Format (BTF) information from DWARF debug info.
 371           Turning this on expects presence of pahole tool, which will convert
 372           DWARF type info into equivalent deduplicated BTF type info.
 373
 374           Required to run BPF CO-RE applications.
 375
 376 config KERNEL_DEBUG_INFO_REDUCED
 377         bool "Reduce debugging information"
 378         default y
 379         depends on KERNEL_DEBUG_INFO
 380         help
 381           If you say Y here gcc is instructed to generate less debugging
 382           information for structure types. This means that tools that
 383           need full debugging information (like kgdb or systemtap) won't
 384           be happy. But if you merely need debugging information to
 385           resolve line numbers there is no loss. Advantage is that
 386           build directory object sizes shrink dramatically over a full
 387           DEBUG_INFO build and compile times are reduced too.
 388           Only works with newer gcc versions.
 389
 390 config KERNEL_FRAME_WARN
 391         int
 392         range 0 8192
 393         default 1280 if KERNEL_KASAN && !ARCH_64BIT
 394         default 1024 if !ARCH_64BIT
 395         default 2048 if ARCH_64BIT
 396         help
 397           Tell the compiler to warn at build time for stack frames larger than this.
 398           Setting this too low will cause a lot of warnings.
 399           Setting it to 0 disables the warning.
 400
 401 # KERNEL_DEBUG_LL symbols must have the default value set as otherwise
 402 # KConfig wont evaluate them unless KERNEL_EARLY_PRINTK is selected
 403 # which means that buildroot wont override the DEBUG_LL symbols in target
 404 # kernel configurations and lead to devices that dont have working console
 405 config KERNEL_DEBUG_LL_UART_NONE
 406         bool
 407         default n
 408         depends on arm
 409
 410 config KERNEL_DEBUG_LL
 411         bool
 412         default n
 413         depends on arm
 414         select KERNEL_DEBUG_LL_UART_NONE
 415         help
 416           ARM low level debugging.
 417
 418 config KERNEL_DEBUG_VIRTUAL
 419         bool "Compile the kernel with VM translations debugging"
 420         select KERNEL_DEBUG_KERNEL
 421         help
 422           Enable checks sanity checks to catch invalid uses of
 423           virt_to_phys()/phys_to_virt() against the non-linear address space.
 424
 425 config KERNEL_DYNAMIC_DEBUG
 426         bool "Compile the kernel with dynamic printk"
 427         select KERNEL_DEBUG_FS
 428         help
 429           Compiles debug level messages into the kernel, which would not
 430           otherwise be available at runtime. These messages can then be
 431           enabled/disabled based on various levels of scope - per source file,
 432           function, module, format string, and line number. This mechanism
 433           implicitly compiles in all pr_debug() and dev_dbg() calls, which
 434           enlarges the kernel text size by about 2%.
 435
 436 config KERNEL_EARLY_PRINTK
 437         bool "Compile the kernel with early printk"
 438         default y if TARGET_bcm53xx
 439         depends on arm
 440         select KERNEL_DEBUG_KERNEL
 441         select KERNEL_DEBUG_LL if arm
 442         help
 443           Compile the kernel with early printk support.  This is only useful for
 444           debugging purposes to send messages over the serial console in early boot.
 445           Enable this to debug early boot problems.
 446
 447 config KERNEL_KPROBES
 448         bool "Compile the kernel with kprobes support"
 449         select KERNEL_FTRACE
 450         select KERNEL_PERF_EVENTS
 451         help
 452           Compiles the kernel with KPROBES support, which allows you to trap
 453           at almost any kernel address and execute a callback function.
 454           register_kprobe() establishes a probepoint and specifies the
 455           callback. Kprobes is useful for kernel debugging, non-intrusive
 456           instrumentation and testing.
 457           If in doubt, say "N".
 458
 459 config KERNEL_KPROBE_EVENTS
 460         bool
 461         default y if KERNEL_KPROBES
 462
 463 config KERNEL_BPF_EVENTS
 464         bool "Compile the kernel with BPF event support"
 465         select KERNEL_KPROBES
 466         help
 467           Allows to attach BPF programs to kprobe, uprobe and tracepoint events.
 468           This is required to use BPF maps of type BPF_MAP_TYPE_PERF_EVENT_ARRAY
 469           for sending data from BPF programs to user-space for post-processing
 470           or logging.
 471
 472 config KERNEL_BPF_KPROBE_OVERRIDE
 473         bool
 474         depends on KERNEL_KPROBES
 475         default n
 476
 477 config KERNEL_AIO
 478         bool "Compile the kernel with asynchronous IO support"
 479         default y if !SMALL_FLASH
 480
 481 config KERNEL_IO_URING
 482         bool "Compile the kernel with io_uring support"
 483         depends on !SMALL_FLASH
 484         default y if (x86_64 || aarch64)
 485
 486 config KERNEL_FHANDLE
 487         bool "Compile the kernel with support for fhandle syscalls"
 488         default y if !SMALL_FLASH
 489
 490 config KERNEL_FANOTIFY
 491         bool "Compile the kernel with modern file notification support"
 492         default y if !SMALL_FLASH
 493
 494 config KERNEL_BLK_DEV_BSG
 495         bool "Compile the kernel with SCSI generic v4 support for any block device"
 496
 497 config KERNEL_TRANSPARENT_HUGEPAGE
 498         bool
 499
 500 choice
 501         prompt "Transparent Hugepage Support sysfs defaults"
 502         depends on KERNEL_TRANSPARENT_HUGEPAGE
 503         default KERNEL_TRANSPARENT_HUGEPAGE_ALWAYS
 504
 505         config KERNEL_TRANSPARENT_HUGEPAGE_ALWAYS
 506                 bool "always"
 507
 508         config KERNEL_TRANSPARENT_HUGEPAGE_MADVISE
 509                 bool "madvise"
 510 endchoice
 511
 512 config KERNEL_HUGETLBFS
 513         bool
 514
 515 config KERNEL_HUGETLB_PAGE
 516         bool "Compile the kernel with HugeTLB support"
 517         select KERNEL_TRANSPARENT_HUGEPAGE
 518         select KERNEL_HUGETLBFS
 519
 520 config KERNEL_MAGIC_SYSRQ
 521         bool "Compile the kernel with SysRq support"
 522         default y
 523
 524 config KERNEL_DEBUG_PINCTRL
 525         bool "Compile the kernel with pinctrl debugging"
 526         select KERNEL_DEBUG_KERNEL
 527
 528 config KERNEL_DEBUG_GPIO
 529         bool "Compile the kernel with gpio debugging"
 530         select KERNEL_DEBUG_KERNEL
 531
 532 config KERNEL_COREDUMP
 533         bool
 534
 535 config KERNEL_ELF_CORE
 536         bool "Enable process core dump support"
 537         select KERNEL_COREDUMP
 538         default y if !SMALL_FLASH
 539
 540 config KERNEL_PROVE_LOCKING
 541         bool "Enable kernel lock checking"
 542         select KERNEL_DEBUG_KERNEL
 543
 544 config KERNEL_SOFTLOCKUP_DETECTOR
 545         bool "Compile the kernel with detect Soft Lockups"
 546         depends on KERNEL_DEBUG_KERNEL
 547         help
 548           Say Y here to enable the kernel to act as a watchdog to detect
 549           soft lockups.
 550
 551           Softlockups are bugs that cause the kernel to loop in kernel
 552           mode for more than 20 seconds, without giving other tasks a
 553           chance to run.  The current stack trace is displayed upon
 554           detection and the system will stay locked up.
 555
 556 config KERNEL_HARDLOCKUP_DETECTOR
 557         bool "Compile the kernel with detect Hard Lockups"
 558         depends on KERNEL_DEBUG_KERNEL
 559         help
 560           Say Y here to enable the kernel to act as a watchdog to detect
 561           hard lockups.
 562
 563           Hardlockups are bugs that cause the CPU to loop in kernel mode
 564           for more than 10 seconds, without letting other interrupts have a
 565           chance to run.  The current stack trace is displayed upon detection
 566           and the system will stay locked up.
 567
 568 config KERNEL_DETECT_HUNG_TASK
 569         bool "Compile the kernel with detect Hung Tasks"
 570         depends on KERNEL_DEBUG_KERNEL
 571         default KERNEL_SOFTLOCKUP_DETECTOR
 572         help
 573           Say Y here to enable the kernel to detect "hung tasks",
 574           which are bugs that cause the task to be stuck in
 575           uninterruptible "D" state indefinitely.
 576
 577           When a hung task is detected, the kernel will print the
 578           current stack trace (which you should report), but the
 579           task will stay in uninterruptible state. If lockdep is
 580           enabled then all held locks will also be reported. This
 581           feature has negligible overhead.
 582
 583 config KERNEL_WQ_WATCHDOG
 584         bool "Compile the kernel with detect Workqueue Stalls"
 585         depends on KERNEL_DEBUG_KERNEL
 586         help
 587           Say Y here to enable stall detection on workqueues.  If a
 588           worker pool doesn't make forward progress on a pending work
 589           item for over a given amount of time, 30s by default, a
 590           warning message is printed along with dump of workqueue
 591           state.  This can be configured through kernel parameter
 592           "workqueue.watchdog_thresh" and its sysfs counterpart.
 593
 594 config KERNEL_DEBUG_ATOMIC_SLEEP
 595         bool "Compile the kernel with sleep inside atomic section checking"
 596         depends on KERNEL_DEBUG_KERNEL
 597         help
 598           If you say Y here, various routines which may sleep will become very
 599           noisy if they are called inside atomic sections: when a spinlock is
 600           held, inside an rcu read side critical section, inside preempt disabled
 601           sections, inside an interrupt, etc...
 602
 603 config KERNEL_DEBUG_VM
 604         bool "Compile the kernel with debug VM"
 605         depends on KERNEL_DEBUG_KERNEL
 606         help
 607           Enable this to turn on extended checks in the virtual-memory system
 608           that may impact performance.
 609
 610           If unsure, say N.
 611
 612 config KERNEL_PRINTK_TIME
 613         bool "Enable printk timestamps"
 614         default y
 615
 616 config KERNEL_SLUB_DEBUG
 617         bool
 618
 619 config KERNEL_SLUB_DEBUG_ON
 620         bool
 621
 622 config KERNEL_SLABINFO
 623         select KERNEL_SLUB_DEBUG
 624         select KERNEL_SLUB_DEBUG_ON
 625         bool "Enable /proc slab debug info"
 626
 627 config KERNEL_PROC_PAGE_MONITOR
 628         bool "Enable /proc page monitoring"
 629
 630 config KERNEL_RELAY
 631         bool
 632
 633 config KERNEL_KEXEC
 634         bool "Enable kexec support"
 635
 636 config KERNEL_PROC_VMCORE
 637         bool
 638
 639 config KERNEL_PROC_KCORE
 640         bool
 641
 642 config KERNEL_CRASH_DUMP
 643         depends on i386 || x86_64 || arm || armeb
 644         select KERNEL_KEXEC
 645         select KERNEL_PROC_VMCORE
 646         select KERNEL_PROC_KCORE
 647         bool "Enable support for kexec crashdump"
 648         default y
 649
 650 config USE_RFKILL
 651         bool "Enable rfkill support"
 652         default RFKILL_SUPPORT
 653
 654 config USE_SPARSE
 655         bool "Enable sparse check during kernel build"
 656
 657 config KERNEL_DEVTMPFS
 658         bool "Compile the kernel with device tmpfs enabled"
 659         help
 660           devtmpfs is a simple, kernel-managed /dev filesystem. The kernel creates
 661           devices nodes for all registered devices to simplify boot, but leaves more
 662           complex tasks to userspace (e.g. udev).
 663
 664 if KERNEL_DEVTMPFS
 665
 666         config KERNEL_DEVTMPFS_MOUNT
 667                 bool "Automatically mount devtmpfs after root filesystem is mounted"
 668
 669 endif
 670
 671 config KERNEL_KEYS
 672         bool "Enable kernel access key retention support"
 673         default !SMALL_FLASH
 674
 675 config KERNEL_PERSISTENT_KEYRINGS
 676         bool "Enable kernel persistent keyrings"
 677         depends on KERNEL_KEYS
 678
 679 config KERNEL_KEYS_REQUEST_CACHE
 680         bool "Enable temporary caching of the last request_key() result"
 681         depends on KERNEL_KEYS
 682
 683 config KERNEL_BIG_KEYS
 684         bool "Enable large payload keys on kernel keyrings"
 685         depends on KERNEL_KEYS
 686
 687 #
 688 # CGROUP support symbols
 689 #
 690
 691 config KERNEL_CGROUPS
 692         bool "Enable kernel cgroups"
 693         default y if !SMALL_FLASH
 694
 695 if KERNEL_CGROUPS
 696
 697         config KERNEL_CGROUP_DEBUG
 698                 bool "Example debug cgroup subsystem"
 699                 help
 700                   This option enables a simple cgroup subsystem that
 701                   exports useful debugging information about the cgroups
 702                   framework.
 703
 704         config KERNEL_FREEZER
 705                 bool
 706
 707         config KERNEL_CGROUP_FREEZER
 708                 bool "legacy Freezer cgroup subsystem"
 709                 select KERNEL_FREEZER
 710                 help
 711                   Provides a way to freeze and unfreeze all tasks in a
 712                   cgroup.
 713                   (legacy cgroup1-only controller, in cgroup2 freezer
 714                   is integrated in the Memory controller)
 715
 716         config KERNEL_CGROUP_DEVICE
 717                 bool "legacy Device controller for cgroups"
 718                 help
 719                   Provides a cgroup implementing whitelists for devices which
 720                   a process in the cgroup can mknod or open.
 721                   (legacy cgroup1-only controller)
 722
 723         config KERNEL_CGROUP_HUGETLB
 724                 bool "HugeTLB controller"
 725                 select KERNEL_HUGETLB_PAGE
 726
 727         config KERNEL_CGROUP_PIDS
 728                 bool "PIDs cgroup subsystem"
 729                 default y
 730                 help
 731                   Provides enforcement of process number limits in the scope of a
 732                   cgroup.
 733
 734         config KERNEL_CGROUP_RDMA
 735                 bool "RDMA controller for cgroups"
 736                 default y
 737
 738         config KERNEL_CGROUP_BPF
 739                 bool "Support for eBPF programs attached to cgroups"
 740                 default y
 741
 742         config KERNEL_CPUSETS
 743                 bool "Cpuset support"
 744                 default y
 745                 help
 746                   This option will let you create and manage CPUSETs which
 747                   allow dynamically partitioning a system into sets of CPUs and
 748                   Memory Nodes and assigning tasks to run only within those sets.
 749                   This is primarily useful on large SMP or NUMA systems.
 750
 751         config KERNEL_PROC_PID_CPUSET
 752                 bool "Include legacy /proc/<pid>/cpuset file"
 753                 depends on KERNEL_CPUSETS
 754
 755         config KERNEL_CGROUP_CPUACCT
 756                 bool "Simple CPU accounting cgroup subsystem"
 757                 default y
 758                 help
 759                   Provides a simple Resource Controller for monitoring the
 760                   total CPU consumed by the tasks in a cgroup.
 761
 762         config KERNEL_RESOURCE_COUNTERS
 763                 bool "Resource counters"
 764                 default y
 765                 help
 766                   This option enables controller independent resource accounting
 767                   infrastructure that works with cgroups.
 768
 769         config KERNEL_MM_OWNER
 770                 bool
 771                 default y if KERNEL_MEMCG
 772
 773         config KERNEL_MEMCG
 774                 bool "Memory Resource Controller for Control Groups"
 775                 default y
 776                 select KERNEL_FREEZER
 777                 depends on KERNEL_RESOURCE_COUNTERS
 778                 help
 779                   Provides a memory resource controller that manages both anonymous
 780                   memory and page cache. (See Documentation/cgroups/memory.txt)
 781
 782                   Note that setting this option increases fixed memory overhead
 783                   associated with each page of memory in the system. By this,
 784                   20(40)bytes/PAGE_SIZE on 32(64)bit system will be occupied by memory
 785                   usage tracking struct at boot. Total amount of this is printed out
 786                   at boot.
 787
 788                   Only enable when you're ok with these tradeoffs and really
 789                   sure you need the memory resource controller. Even when you enable
 790                   this, you can set "cgroup_disable=memory" at your boot option to
 791                   disable memory resource controller and you can avoid overheads
 792                   (but lose benefits of memory resource controller).
 793
 794                   This config option also selects MM_OWNER config option, which
 795                   could in turn add some fork/exit overhead.
 796
 797         config KERNEL_MEMCG_SWAP
 798                 bool "Memory Resource Controller Swap Extension"
 799                 default y
 800                 depends on KERNEL_MEMCG
 801                 help
 802                   Add swap management feature to memory resource controller. When you
 803                   enable this, you can limit mem+swap usage per cgroup. In other words,
 804                   when you disable this, memory resource controller has no cares to
 805                   usage of swap...a process can exhaust all of the swap. This extension
 806                   is useful when you want to avoid exhaustion swap but this itself
 807                   adds more overheads and consumes memory for remembering information.
 808                   Especially if you use 32bit system or small memory system, please
 809                   be careful about enabling this. When memory resource controller
 810                   is disabled by boot option, this will be automatically disabled and
 811                   there will be no overhead from this. Even when you set this config=y,
 812                   if boot option "swapaccount=0" is set, swap will not be accounted.
 813                   Now, memory usage of swap_cgroup is 2 bytes per entry. If swap page
 814                   size is 4096bytes, 512k per 1Gbytes of swap.
 815
 816         config KERNEL_MEMCG_SWAP_ENABLED
 817                 bool "Memory Resource Controller Swap Extension enabled by default"
 818                 depends on KERNEL_MEMCG_SWAP
 819                 help
 820                   Memory Resource Controller Swap Extension comes with its price in
 821                   a bigger memory consumption. General purpose distribution kernels
 822                   which want to enable the feature but keep it disabled by default
 823                   and let the user enable it by swapaccount boot command line
 824                   parameter should have this option unselected.
 825
 826                   Those who want to have the feature enabled by default should
 827                   select this option (if, for some reason, they need to disable it,
 828                   then swapaccount=0 does the trick).
 829
 830
 831         config KERNEL_MEMCG_KMEM
 832                 bool "Memory Resource Controller Kernel Memory accounting (EXPERIMENTAL)"
 833                 default y
 834                 depends on KERNEL_MEMCG
 835                 help
 836                   The Kernel Memory extension for Memory Resource Controller can limit
 837                   the amount of memory used by kernel objects in the system. Those are
 838                   fundamentally different from the entities handled by the standard
 839                   Memory Controller, which are page-based, and can be swapped. Users of
 840                   the kmem extension can use it to guarantee that no group of processes
 841                   will ever exhaust kernel resources alone.
 842
 843         config KERNEL_CGROUP_PERF
 844                 bool "Enable perf_event per-cpu per-container group (cgroup) monitoring"
 845                 select KERNEL_PERF_EVENTS
 846                 help
 847                   This option extends the per-cpu mode to restrict monitoring to
 848                   threads which belong to the cgroup specified and run on the
 849                   designated cpu.
 850
 851         menuconfig KERNEL_CGROUP_SCHED
 852                 bool "Group CPU scheduler"
 853                 default y
 854                 help
 855                   This feature lets CPU scheduler recognize task groups and control CPU
 856                   bandwidth allocation to such task groups. It uses cgroups to group
 857                   tasks.
 858
 859         if KERNEL_CGROUP_SCHED
 860
 861                 config KERNEL_FAIR_GROUP_SCHED
 862                         bool "Group scheduling for SCHED_OTHER"
 863                         default y
 864
 865                 config KERNEL_CFS_BANDWIDTH
 866                         bool "CPU bandwidth provisioning for FAIR_GROUP_SCHED"
 867                         default y
 868                         depends on KERNEL_FAIR_GROUP_SCHED
 869                         help
 870                           This option allows users to define CPU bandwidth rates (limits) for
 871                           tasks running within the fair group scheduler.  Groups with no limit
 872                           set are considered to be unconstrained and will run with no
 873                           restriction.
 874                           See tip/Documentation/scheduler/sched-bwc.txt for more information.
 875
 876                 config KERNEL_RT_GROUP_SCHED
 877                         bool "Group scheduling for SCHED_RR/FIFO"
 878                         default y
 879                         help
 880                           This feature lets you explicitly allocate real CPU bandwidth
 881                           to task groups. If enabled, it will also make it impossible to
 882                           schedule realtime tasks for non-root users until you allocate
 883                           realtime bandwidth for them.
 884
 885         endif
 886
 887         config KERNEL_BLK_CGROUP
 888                 bool "Block IO controller"
 889                 default y
 890                 help
 891                   Generic block IO controller cgroup interface. This is the common
 892                   cgroup interface which should be used by various IO controlling
 893                   policies.
 894
 895                   Currently, CFQ IO scheduler uses it to recognize task groups and
 896                   control disk bandwidth allocation (proportional time slice allocation)
 897                   to such task groups. It is also used by bio throttling logic in
 898                   block layer to implement upper limit in IO rates on a device.
 899
 900                   This option only enables generic Block IO controller infrastructure.
 901                   One needs to also enable actual IO controlling logic/policy. For
 902                   enabling proportional weight division of disk bandwidth in CFQ, set
 903                   CONFIG_CFQ_GROUP_IOSCHED=y; for enabling throttling policy, set
 904                   CONFIG_BLK_DEV_THROTTLING=y.
 905
 906         if KERNEL_BLK_CGROUP
 907
 908                 config KERNEL_CFQ_GROUP_IOSCHED
 909                         bool "Proportional weight of disk bandwidth in CFQ"
 910
 911                 config KERNEL_BLK_DEV_THROTTLING
 912                         bool "Enable throttling policy"
 913                         default y
 914
 915                 config KERNEL_BLK_DEV_THROTTLING_LOW
 916                         bool "Block throttling .low limit interface support (EXPERIMENTAL)"
 917                         depends on KERNEL_BLK_DEV_THROTTLING
 918         endif
 919
 920         config KERNEL_DEBUG_BLK_CGROUP
 921                 bool "Enable Block IO controller debugging"
 922                 depends on KERNEL_BLK_CGROUP
 923                 help
 924                   Enable some debugging help. Currently it exports additional stat
 925                   files in a cgroup which can be useful for debugging.
 926
 927         config KERNEL_NET_CLS_CGROUP
 928                 bool "legacy Control Group Classifier"
 929
 930         config KERNEL_CGROUP_NET_CLASSID
 931                 bool "legacy Network classid cgroup"
 932
 933         config KERNEL_CGROUP_NET_PRIO
 934                 bool "legacy Network priority cgroup"
 935
 936 endif
 937
 938 #
 939 # Namespace support symbols
 940 #
 941
 942 config KERNEL_NAMESPACES
 943         bool "Enable kernel namespaces"
 944         default y if !SMALL_FLASH
 945
 946 if KERNEL_NAMESPACES
 947
 948         config KERNEL_UTS_NS
 949                 bool "UTS namespace"
 950                 default y
 951                 help
 952                   In this namespace, tasks see different info provided
 953                   with the uname() system call.
 954
 955         config KERNEL_IPC_NS
 956                 bool "IPC namespace"
 957                 default y
 958                 help
 959                   In this namespace, tasks work with IPC ids which correspond to
 960                   different IPC objects in different namespaces.
 961
 962         config KERNEL_USER_NS
 963                 bool "User namespace (EXPERIMENTAL)"
 964                 default y
 965                 help
 966                   This allows containers, i.e. vservers, to use user namespaces
 967                   to provide different user info for different servers.
 968
 969         config KERNEL_PID_NS
 970                 bool "PID Namespaces"
 971                 default y
 972                 help
 973                   Support process id namespaces. This allows having multiple
 974                   processes with the same pid as long as they are in different
 975                   pid namespaces. This is a building block of containers.
 976
 977         config KERNEL_NET_NS
 978                 bool "Network namespace"
 979                 default y
 980                 help
 981                   Allow user space to create what appear to be multiple instances
 982                   of the network stack.
 983
 984 endif
 985
 986 config KERNEL_DEVPTS_MULTIPLE_INSTANCES
 987         bool "Support multiple instances of devpts"
 988         default y if !SMALL_FLASH
 989         help
 990           Enable support for multiple instances of devpts filesystem.
 991           If you want to have isolated PTY namespaces (eg: in containers),
 992           say Y here. Otherwise, say N. If enabled, each mount of devpts
 993           filesystem with the '-o newinstance' option will create an
 994           independent PTY namespace.
 995
 996 config KERNEL_POSIX_MQUEUE
 997         bool "POSIX Message Queues"
 998         default y if !SMALL_FLASH
 999         help
1000           POSIX variant of message queues is a part of IPC. In POSIX message
1001           queues every message has a priority which decides about succession
1002           of receiving it by a process. If you want to compile and run
1003           programs written e.g. for Solaris with use of its POSIX message
1004           queues (functions mq_*) say Y here.
1005
1006           POSIX message queues are visible as a filesystem called 'mqueue'
1007           and can be mounted somewhere if you want to do filesystem
1008           operations on message queues.
1009
1010
1011 config KERNEL_SECCOMP_FILTER
1012         bool
1013         default y if !SMALL_FLASH
1014
1015 config KERNEL_SECCOMP
1016         bool "Enable seccomp support"
1017                 depends on !(TARGET_uml)
1018                 select KERNEL_SECCOMP_FILTER
1019                 default y if !SMALL_FLASH
1020                 help
1021                   Build kernel with support for seccomp.
1022
1023 #
1024 # IPv4 configuration
1025 #
1026
1027 config KERNEL_IP_MROUTE
1028         bool "Enable IPv4 multicast routing"
1029         default y
1030         help
1031           Multicast routing requires a multicast routing daemon in
1032           addition to kernel support.
1033
1034 if KERNEL_IP_MROUTE
1035
1036         config KERNEL_IP_MROUTE_MULTIPLE_TABLES
1037                 def_bool y
1038
1039         config KERNEL_IP_PIMSM_V1
1040                 def_bool y
1041
1042         config KERNEL_IP_PIMSM_V2
1043                 def_bool y
1044
1045 endif
1046
1047 #
1048 # IPv6 configuration
1049 #
1050
1051 config KERNEL_IPV6
1052         def_bool IPV6
1053
1054 if KERNEL_IPV6
1055
1056         config KERNEL_IPV6_MULTIPLE_TABLES
1057                 def_bool y
1058
1059         config KERNEL_IPV6_SUBTREES
1060                 def_bool y
1061
1062         config KERNEL_IPV6_MROUTE
1063                 bool "Enable IPv6 multicast routing"
1064                 default y
1065                 help
1066                   Multicast routing requires a multicast routing daemon in
1067                   addition to kernel support.
1068
1069         if KERNEL_IPV6_MROUTE
1070
1071                 config KERNEL_IPV6_MROUTE_MULTIPLE_TABLES
1072                         def_bool y
1073
1074                 config KERNEL_IPV6_PIMSM_V2
1075                         def_bool y
1076
1077         endif
1078
1079         config KERNEL_IPV6_SEG6_LWTUNNEL
1080                 bool "Enable support for lightweight tunnels"
1081                 default y if !SMALL_FLASH
1082                 help
1083                   Using lwtunnel (needed for IPv6 segment routing) requires ip-full package.
1084
1085         config KERNEL_LWTUNNEL_BPF
1086                 def_bool n
1087
1088 endif
1089
1090 #
1091 # Miscellaneous network configuration
1092 #
1093
1094 config KERNEL_NET_L3_MASTER_DEV
1095         bool "L3 Master device support"
1096         help
1097           This module provides glue between core networking code and device
1098           drivers to support L3 master devices like VRF.
1099
1100 config KERNEL_WIRELESS_EXT
1101         def_bool n
1102
1103 config KERNEL_WEXT_CORE
1104         def_bool KERNEL_WIRELESS_EXT
1105
1106 config KERNEL_WEXT_PRIV
1107         def_bool KERNEL_WIRELESS_EXT
1108
1109 config KERNEL_WEXT_PROC
1110         def_bool KERNEL_WIRELESS_EXT
1111
1112 config KERNEL_WEXT_SPY
1113         def_bool KERNEL_WIRELESS_EXT
1114
1115 config KERNEL_PAGE_POOL
1116         def_bool n
1117
1118 config KERNEL_PAGE_POOL_STATS
1119         bool "Page pool stats support"
1120         depends on KERNEL_PAGE_POOL
1121
1122 #
1123 # NFS related symbols
1124 #
1125 config KERNEL_IP_PNP
1126         bool "Compile the kernel with rootfs on NFS"
1127         help
1128            If you want to make your kernel boot off a NFS server as root
1129            filesystem, select Y here.
1130
1131 if KERNEL_IP_PNP
1132
1133         config KERNEL_IP_PNP_DHCP
1134                 def_bool y
1135
1136         config KERNEL_IP_PNP_BOOTP
1137                 def_bool n
1138
1139         config KERNEL_IP_PNP_RARP
1140                 def_bool n
1141
1142         config KERNEL_NFS_FS
1143                 def_bool y
1144
1145         config KERNEL_NFS_V2
1146                 def_bool y
1147
1148         config KERNEL_NFS_V3
1149                 def_bool y
1150
1151         config KERNEL_ROOT_NFS
1152                 def_bool y
1153
1154 endif
1155
1156 menu "Filesystem ACL and attr support options"
1157         config USE_FS_ACL_ATTR
1158                 bool "Use filesystem ACL and attr support by default"
1159                 help
1160                   Make using ACLs (e.g. POSIX ACL, NFSv4 ACL) the default
1161                   for kernel and packages, except tmpfs, flash filesystems,
1162                   and old NFS.  Also enable userspace extended attribute support
1163                   by default.  (OpenWrt already has an expection it will be
1164                   present in the kernel).
1165
1166         config KERNEL_FS_POSIX_ACL
1167                 bool "Enable POSIX ACL support"
1168                 default y if USE_FS_ACL_ATTR
1169
1170         config KERNEL_BTRFS_FS_POSIX_ACL
1171                 bool "Enable POSIX ACL for BtrFS Filesystems"
1172                 select KERNEL_FS_POSIX_ACL
1173                 default y if USE_FS_ACL_ATTR
1174
1175         config KERNEL_EXT4_FS_POSIX_ACL
1176                 bool "Enable POSIX ACL for Ext4 Filesystems"
1177                 select KERNEL_FS_POSIX_ACL
1178                 default y if USE_FS_ACL_ATTR
1179
1180         config KERNEL_F2FS_FS_POSIX_ACL
1181                 bool "Enable POSIX ACL for F2FS Filesystems"
1182                 select KERNEL_FS_POSIX_ACL
1183
1184         config KERNEL_JFFS2_FS_POSIX_ACL
1185                 bool "Enable POSIX ACL for JFFS2 Filesystems"
1186                 select KERNEL_FS_POSIX_ACL
1187
1188         config KERNEL_TMPFS_POSIX_ACL
1189                 bool "Enable POSIX ACL for TMPFS Filesystems"
1190                 select KERNEL_FS_POSIX_ACL
1191
1192         config KERNEL_CIFS_ACL
1193                 bool "Enable CIFS ACLs"
1194                 select KERNEL_FS_POSIX_ACL
1195                 default y if USE_FS_ACL_ATTR
1196
1197         config KERNEL_HFS_FS_POSIX_ACL
1198                 bool "Enable POSIX ACL for HFS Filesystems"
1199                 select KERNEL_FS_POSIX_ACL
1200                 default y if USE_FS_ACL_ATTR
1201
1202         config KERNEL_HFSPLUS_FS_POSIX_ACL
1203                 bool "Enable POSIX ACL for HFS+ Filesystems"
1204                 select KERNEL_FS_POSIX_ACL
1205                 default y if USE_FS_ACL_ATTR
1206
1207         config KERNEL_NFS_ACL_SUPPORT
1208                 bool "Enable ACLs for NFS"
1209                 default y if USE_FS_ACL_ATTR
1210
1211         config KERNEL_NFS_V3_ACL_SUPPORT
1212                 bool "Enable ACLs for NFSv3"
1213
1214         config KERNEL_NFSD_V2_ACL_SUPPORT
1215                 bool "Enable ACLs for NFSDv2"
1216
1217         config KERNEL_NFSD_V3_ACL_SUPPORT
1218                 bool "Enable ACLs for NFSDv3"
1219
1220         config KERNEL_REISER_FS_POSIX_ACL
1221                 bool "Enable POSIX ACLs for ReiserFS"
1222                 select KERNEL_FS_POSIX_ACL
1223                 default y if USE_FS_ACL_ATTR
1224
1225         config KERNEL_XFS_POSIX_ACL
1226                 bool "Enable POSIX ACLs for XFS"
1227                 select KERNEL_FS_POSIX_ACL
1228                 default y if USE_FS_ACL_ATTR
1229
1230         config KERNEL_JFS_POSIX_ACL
1231                 bool "Enable POSIX ACLs for JFS"
1232                 select KERNEL_FS_POSIX_ACL
1233                 default y if USE_FS_ACL_ATTR
1234
1235 endmenu
1236
1237 config KERNEL_DEVMEM
1238         bool "/dev/mem virtual device support"
1239         help
1240           Say Y here if you want to support the /dev/mem device.
1241           The /dev/mem device is used to access areas of physical
1242           memory.
1243
1244 config KERNEL_DEVKMEM
1245         bool "/dev/kmem virtual device support"
1246         help
1247           Say Y here if you want to support the /dev/kmem device. The
1248           /dev/kmem device is rarely used, but can be used for certain
1249           kind of kernel debugging operations.
1250
1251 config KERNEL_SQUASHFS_FRAGMENT_CACHE_SIZE
1252         int "Number of squashfs fragments cached"
1253         default 2 if (SMALL_FLASH && !LOW_MEMORY_FOOTPRINT)
1254         default 3
1255
1256 config KERNEL_SQUASHFS_XATTR
1257         bool "Squashfs XATTR support"
1258
1259 #
1260 # compile optimization setting
1261 #
1262 choice
1263         prompt "Compiler optimization level"
1264         default KERNEL_CC_OPTIMIZE_FOR_SIZE if SMALL_FLASH
1265
1266 config KERNEL_CC_OPTIMIZE_FOR_PERFORMANCE
1267         bool "Optimize for performance"
1268         help
1269           This is the default optimization level for the kernel, building
1270           with the "-O2" compiler flag for best performance and most
1271           helpful compile-time warnings.
1272
1273 config KERNEL_CC_OPTIMIZE_FOR_SIZE
1274         bool "Optimize for size"
1275         help
1276           Enabling this option will pass "-Os" instead of "-O2" to
1277           your compiler resulting in a smaller kernel.
1278
1279 endchoice
1280
1281 config KERNEL_AUDIT
1282         bool "Auditing support"
1283
1284 config KERNEL_SECURITY
1285         bool "Enable different security models"
1286
1287 config KERNEL_SECURITY_NETWORK
1288         bool "Socket and Networking Security Hooks"
1289         select KERNEL_SECURITY
1290
1291 config KERNEL_SECURITY_SELINUX
1292         bool "NSA SELinux Support"
1293         select KERNEL_SECURITY_NETWORK
1294         select KERNEL_AUDIT
1295
1296 config KERNEL_SECURITY_SELINUX_BOOTPARAM
1297         bool "NSA SELinux boot parameter"
1298         depends on KERNEL_SECURITY_SELINUX
1299         default y
1300
1301 config KERNEL_SECURITY_SELINUX_DISABLE
1302         bool "NSA SELinux runtime disable"
1303         depends on KERNEL_SECURITY_SELINUX
1304
1305 config KERNEL_SECURITY_SELINUX_DEVELOP
1306         bool "NSA SELinux Development Support"
1307         depends on KERNEL_SECURITY_SELINUX
1308         default y
1309
1310 config KERNEL_SECURITY_SELINUX_SIDTAB_HASH_BITS
1311         int
1312         depends on KERNEL_SECURITY_SELINUX
1313         default 9
1314
1315 config KERNEL_SECURITY_SELINUX_SID2STR_CACHE_SIZE
1316         int
1317         depends on KERNEL_SECURITY_SELINUX
1318         default 256
1319
1320 config KERNEL_LSM
1321         string
1322         default "lockdown,yama,loadpin,safesetid,integrity,selinux"
1323         depends on KERNEL_SECURITY_SELINUX
1324
1325 config KERNEL_EXT4_FS_SECURITY
1326         bool "Ext4 Security Labels"
1327
1328 config KERNEL_F2FS_FS_SECURITY
1329         bool "F2FS Security Labels"
1330
1331 config KERNEL_UBIFS_FS_SECURITY
1332         bool "UBIFS Security Labels"
1333
1334 config KERNEL_JFFS2_FS_SECURITY
1335         bool "JFFS2 Security Labels"