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 # KERNEL_DEBUG_LL symbols must have the default value set as otherwise
 391 # KConfig wont evaluate them unless KERNEL_EARLY_PRINTK is selected
 392 # which means that buildroot wont override the DEBUG_LL symbols in target
 393 # kernel configurations and lead to devices that dont have working console
 394 config KERNEL_DEBUG_LL_UART_NONE
 395         bool
 396         default n
 397         depends on arm
 398
 399 config KERNEL_DEBUG_LL
 400         bool
 401         default n
 402         depends on arm
 403         select KERNEL_DEBUG_LL_UART_NONE
 404         help
 405           ARM low level debugging.
 406
 407 config KERNEL_DEBUG_VIRTUAL
 408         bool "Compile the kernel with VM translations debugging"
 409         select KERNEL_DEBUG_KERNEL
 410         help
 411           Enable checks sanity checks to catch invalid uses of
 412           virt_to_phys()/phys_to_virt() against the non-linear address space.
 413
 414 config KERNEL_DYNAMIC_DEBUG
 415         bool "Compile the kernel with dynamic printk"
 416         select KERNEL_DEBUG_FS
 417         help
 418           Compiles debug level messages into the kernel, which would not
 419           otherwise be available at runtime. These messages can then be
 420           enabled/disabled based on various levels of scope - per source file,
 421           function, module, format string, and line number. This mechanism
 422           implicitly compiles in all pr_debug() and dev_dbg() calls, which
 423           enlarges the kernel text size by about 2%.
 424
 425 config KERNEL_EARLY_PRINTK
 426         bool "Compile the kernel with early printk"
 427         default y if TARGET_bcm53xx
 428         depends on arm
 429         select KERNEL_DEBUG_KERNEL
 430         select KERNEL_DEBUG_LL if arm
 431         help
 432           Compile the kernel with early printk support.  This is only useful for
 433           debugging purposes to send messages over the serial console in early boot.
 434           Enable this to debug early boot problems.
 435
 436 config KERNEL_KPROBES
 437         bool "Compile the kernel with kprobes support"
 438         select KERNEL_FTRACE
 439         select KERNEL_PERF_EVENTS
 440         help
 441           Compiles the kernel with KPROBES support, which allows you to trap
 442           at almost any kernel address and execute a callback function.
 443           register_kprobe() establishes a probepoint and specifies the
 444           callback. Kprobes is useful for kernel debugging, non-intrusive
 445           instrumentation and testing.
 446           If in doubt, say "N".
 447
 448 config KERNEL_KPROBE_EVENTS
 449         bool
 450         default y if KERNEL_KPROBES
 451
 452 config KERNEL_BPF_EVENTS
 453         bool "Compile the kernel with BPF event support"
 454         select KERNEL_KPROBES
 455         help
 456           Allows to attach BPF programs to kprobe, uprobe and tracepoint events.
 457           This is required to use BPF maps of type BPF_MAP_TYPE_PERF_EVENT_ARRAY
 458           for sending data from BPF programs to user-space for post-processing
 459           or logging.
 460
 461 config KERNEL_BPF_KPROBE_OVERRIDE
 462         bool
 463         depends on KERNEL_KPROBES
 464
 465 config KERNEL_AIO
 466         bool "Compile the kernel with asynchronous IO support"
 467         default y if !SMALL_FLASH
 468
 469 config KERNEL_IO_URING
 470         bool "Compile the kernel with io_uring support"
 471         default y if !SMALL_FLASH
 472
 473 config KERNEL_FHANDLE
 474         bool "Compile the kernel with support for fhandle syscalls"
 475         default y if !SMALL_FLASH
 476
 477 config KERNEL_FANOTIFY
 478         bool "Compile the kernel with modern file notification support"
 479         default y if !SMALL_FLASH
 480
 481 config KERNEL_BLK_DEV_BSG
 482         bool "Compile the kernel with SCSI generic v4 support for any block device"
 483
 484 config KERNEL_TRANSPARENT_HUGEPAGE
 485         bool
 486
 487 choice
 488         prompt "Transparent Hugepage Support sysfs defaults"
 489         depends on KERNEL_TRANSPARENT_HUGEPAGE
 490         default KERNEL_TRANSPARENT_HUGEPAGE_ALWAYS
 491
 492         config KERNEL_TRANSPARENT_HUGEPAGE_ALWAYS
 493                 bool "always"
 494
 495         config KERNEL_TRANSPARENT_HUGEPAGE_MADVISE
 496                 bool "madvise"
 497 endchoice
 498
 499 config KERNEL_HUGETLBFS
 500         bool
 501
 502 config KERNEL_HUGETLB_PAGE
 503         bool "Compile the kernel with HugeTLB support"
 504         select KERNEL_TRANSPARENT_HUGEPAGE
 505         select KERNEL_HUGETLBFS
 506
 507 config KERNEL_MAGIC_SYSRQ
 508         bool "Compile the kernel with SysRq support"
 509         default y
 510
 511 config KERNEL_DEBUG_PINCTRL
 512         bool "Compile the kernel with pinctrl debugging"
 513         select KERNEL_DEBUG_KERNEL
 514
 515 config KERNEL_DEBUG_GPIO
 516         bool "Compile the kernel with gpio debugging"
 517         select KERNEL_DEBUG_KERNEL
 518
 519 config KERNEL_COREDUMP
 520         bool
 521
 522 config KERNEL_ELF_CORE
 523         bool "Enable process core dump support"
 524         select KERNEL_COREDUMP
 525         default y if !SMALL_FLASH
 526
 527 config KERNEL_PROVE_LOCKING
 528         bool "Enable kernel lock checking"
 529         select KERNEL_DEBUG_KERNEL
 530
 531 config KERNEL_SOFTLOCKUP_DETECTOR
 532         bool "Compile the kernel with detect Soft Lockups"
 533         depends on KERNEL_DEBUG_KERNEL
 534         help
 535           Say Y here to enable the kernel to act as a watchdog to detect
 536           soft lockups.
 537
 538           Softlockups are bugs that cause the kernel to loop in kernel
 539           mode for more than 20 seconds, without giving other tasks a
 540           chance to run.  The current stack trace is displayed upon
 541           detection and the system will stay locked up.
 542
 543 config KERNEL_DETECT_HUNG_TASK
 544         bool "Compile the kernel with detect Hung Tasks"
 545         depends on KERNEL_DEBUG_KERNEL
 546         default KERNEL_SOFTLOCKUP_DETECTOR
 547         help
 548           Say Y here to enable the kernel to detect "hung tasks",
 549           which are bugs that cause the task to be stuck in
 550           uninterruptible "D" state indefinitely.
 551
 552           When a hung task is detected, the kernel will print the
 553           current stack trace (which you should report), but the
 554           task will stay in uninterruptible state. If lockdep is
 555           enabled then all held locks will also be reported. This
 556           feature has negligible overhead.
 557
 558 config KERNEL_WQ_WATCHDOG
 559         bool "Compile the kernel with detect Workqueue Stalls"
 560         depends on KERNEL_DEBUG_KERNEL
 561         help
 562           Say Y here to enable stall detection on workqueues.  If a
 563           worker pool doesn't make forward progress on a pending work
 564           item for over a given amount of time, 30s by default, a
 565           warning message is printed along with dump of workqueue
 566           state.  This can be configured through kernel parameter
 567           "workqueue.watchdog_thresh" and its sysfs counterpart.
 568
 569 config KERNEL_DEBUG_ATOMIC_SLEEP
 570         bool "Compile the kernel with sleep inside atomic section checking"
 571         depends on KERNEL_DEBUG_KERNEL
 572         help
 573           If you say Y here, various routines which may sleep will become very
 574           noisy if they are called inside atomic sections: when a spinlock is
 575           held, inside an rcu read side critical section, inside preempt disabled
 576           sections, inside an interrupt, etc...
 577
 578 config KERNEL_DEBUG_VM
 579         bool "Compile the kernel with debug VM"
 580         depends on KERNEL_DEBUG_KERNEL
 581         help
 582           Enable this to turn on extended checks in the virtual-memory system
 583           that may impact performance.
 584
 585           If unsure, say N.
 586
 587 config KERNEL_PRINTK_TIME
 588         bool "Enable printk timestamps"
 589         default y
 590
 591 config KERNEL_SLUB_DEBUG
 592         bool
 593
 594 config KERNEL_SLUB_DEBUG_ON
 595         bool
 596
 597 config KERNEL_SLABINFO
 598         select KERNEL_SLUB_DEBUG
 599         select KERNEL_SLUB_DEBUG_ON
 600         bool "Enable /proc slab debug info"
 601
 602 config KERNEL_PROC_PAGE_MONITOR
 603         bool "Enable /proc page monitoring"
 604
 605 config KERNEL_RELAY
 606         bool
 607
 608 config KERNEL_KEXEC
 609         bool "Enable kexec support"
 610
 611 config KERNEL_PROC_VMCORE
 612         bool
 613
 614 config KERNEL_PROC_KCORE
 615         bool
 616
 617 config KERNEL_CRASH_DUMP
 618         depends on i386 || x86_64 || arm || armeb
 619         select KERNEL_KEXEC
 620         select KERNEL_PROC_VMCORE
 621         select KERNEL_PROC_KCORE
 622         bool "Enable support for kexec crashdump"
 623         default y
 624
 625 config USE_RFKILL
 626         bool "Enable rfkill support"
 627         default RFKILL_SUPPORT
 628
 629 config USE_SPARSE
 630         bool "Enable sparse check during kernel build"
 631
 632 config KERNEL_DEVTMPFS
 633         bool "Compile the kernel with device tmpfs enabled"
 634         help
 635           devtmpfs is a simple, kernel-managed /dev filesystem. The kernel creates
 636           devices nodes for all registered devices to simplify boot, but leaves more
 637           complex tasks to userspace (e.g. udev).
 638
 639 if KERNEL_DEVTMPFS
 640
 641         config KERNEL_DEVTMPFS_MOUNT
 642                 bool "Automatically mount devtmpfs after root filesystem is mounted"
 643
 644 endif
 645
 646 config KERNEL_KEYS
 647         bool "Enable kernel access key retention support"
 648         default !SMALL_FLASH
 649
 650 config KERNEL_PERSISTENT_KEYRINGS
 651         bool "Enable kernel persistent keyrings"
 652         depends on KERNEL_KEYS
 653
 654 config KERNEL_KEYS_REQUEST_CACHE
 655         bool "Enable temporary caching of the last request_key() result"
 656         depends on KERNEL_KEYS
 657
 658 config KERNEL_BIG_KEYS
 659         bool "Enable large payload keys on kernel keyrings"
 660         depends on KERNEL_KEYS
 661
 662 #
 663 # CGROUP support symbols
 664 #
 665
 666 config KERNEL_CGROUPS
 667         bool "Enable kernel cgroups"
 668         default y if !SMALL_FLASH
 669
 670 if KERNEL_CGROUPS
 671
 672         config KERNEL_CGROUP_DEBUG
 673                 bool "Example debug cgroup subsystem"
 674                 help
 675                   This option enables a simple cgroup subsystem that
 676                   exports useful debugging information about the cgroups
 677                   framework.
 678
 679         config KERNEL_FREEZER
 680                 bool
 681
 682         config KERNEL_CGROUP_FREEZER
 683                 bool "legacy Freezer cgroup subsystem"
 684                 select KERNEL_FREEZER
 685                 help
 686                   Provides a way to freeze and unfreeze all tasks in a
 687                   cgroup.
 688                   (legacy cgroup1-only controller, in cgroup2 freezer
 689                   is integrated in the Memory controller)
 690
 691         config KERNEL_CGROUP_DEVICE
 692                 bool "legacy Device controller for cgroups"
 693                 help
 694                   Provides a cgroup implementing whitelists for devices which
 695                   a process in the cgroup can mknod or open.
 696                   (legacy cgroup1-only controller)
 697
 698         config KERNEL_CGROUP_HUGETLB
 699                 bool "HugeTLB controller"
 700                 select KERNEL_HUGETLB_PAGE
 701
 702         config KERNEL_CGROUP_PIDS
 703                 bool "PIDs cgroup subsystem"
 704                 default y
 705                 help
 706                   Provides enforcement of process number limits in the scope of a
 707                   cgroup.
 708
 709         config KERNEL_CGROUP_RDMA
 710                 bool "RDMA controller for cgroups"
 711                 default y
 712
 713         config KERNEL_CGROUP_BPF
 714                 bool "Support for eBPF programs attached to cgroups"
 715                 default y
 716
 717         config KERNEL_CPUSETS
 718                 bool "Cpuset support"
 719                 default y
 720                 help
 721                   This option will let you create and manage CPUSETs which
 722                   allow dynamically partitioning a system into sets of CPUs and
 723                   Memory Nodes and assigning tasks to run only within those sets.
 724                   This is primarily useful on large SMP or NUMA systems.
 725
 726         config KERNEL_PROC_PID_CPUSET
 727                 bool "Include legacy /proc/<pid>/cpuset file"
 728                 depends on KERNEL_CPUSETS
 729
 730         config KERNEL_CGROUP_CPUACCT
 731                 bool "Simple CPU accounting cgroup subsystem"
 732                 default y
 733                 help
 734                   Provides a simple Resource Controller for monitoring the
 735                   total CPU consumed by the tasks in a cgroup.
 736
 737         config KERNEL_RESOURCE_COUNTERS
 738                 bool "Resource counters"
 739                 default y
 740                 help
 741                   This option enables controller independent resource accounting
 742                   infrastructure that works with cgroups.
 743
 744         config KERNEL_MM_OWNER
 745                 bool
 746                 default y if KERNEL_MEMCG
 747
 748         config KERNEL_MEMCG
 749                 bool "Memory Resource Controller for Control Groups"
 750                 default y
 751                 select KERNEL_FREEZER
 752                 depends on KERNEL_RESOURCE_COUNTERS
 753                 help
 754                   Provides a memory resource controller that manages both anonymous
 755                   memory and page cache. (See Documentation/cgroups/memory.txt)
 756
 757                   Note that setting this option increases fixed memory overhead
 758                   associated with each page of memory in the system. By this,
 759                   20(40)bytes/PAGE_SIZE on 32(64)bit system will be occupied by memory
 760                   usage tracking struct at boot. Total amount of this is printed out
 761                   at boot.
 762
 763                   Only enable when you're ok with these tradeoffs and really
 764                   sure you need the memory resource controller. Even when you enable
 765                   this, you can set "cgroup_disable=memory" at your boot option to
 766                   disable memory resource controller and you can avoid overheads
 767                   (but lose benefits of memory resource controller).
 768
 769                   This config option also selects MM_OWNER config option, which
 770                   could in turn add some fork/exit overhead.
 771
 772         config KERNEL_MEMCG_SWAP
 773                 bool "Memory Resource Controller Swap Extension"
 774                 default y
 775                 depends on KERNEL_MEMCG
 776                 help
 777                   Add swap management feature to memory resource controller. When you
 778                   enable this, you can limit mem+swap usage per cgroup. In other words,
 779                   when you disable this, memory resource controller has no cares to
 780                   usage of swap...a process can exhaust all of the swap. This extension
 781                   is useful when you want to avoid exhaustion swap but this itself
 782                   adds more overheads and consumes memory for remembering information.
 783                   Especially if you use 32bit system or small memory system, please
 784                   be careful about enabling this. When memory resource controller
 785                   is disabled by boot option, this will be automatically disabled and
 786                   there will be no overhead from this. Even when you set this config=y,
 787                   if boot option "swapaccount=0" is set, swap will not be accounted.
 788                   Now, memory usage of swap_cgroup is 2 bytes per entry. If swap page
 789                   size is 4096bytes, 512k per 1Gbytes of swap.
 790
 791         config KERNEL_MEMCG_SWAP_ENABLED
 792                 bool "Memory Resource Controller Swap Extension enabled by default"
 793                 depends on KERNEL_MEMCG_SWAP
 794                 help
 795                   Memory Resource Controller Swap Extension comes with its price in
 796                   a bigger memory consumption. General purpose distribution kernels
 797                   which want to enable the feature but keep it disabled by default
 798                   and let the user enable it by swapaccount boot command line
 799                   parameter should have this option unselected.
 800
 801                   Those who want to have the feature enabled by default should
 802                   select this option (if, for some reason, they need to disable it,
 803                   then swapaccount=0 does the trick).
 804
 805
 806         config KERNEL_MEMCG_KMEM
 807                 bool "Memory Resource Controller Kernel Memory accounting (EXPERIMENTAL)"
 808                 default y
 809                 depends on KERNEL_MEMCG
 810                 help
 811                   The Kernel Memory extension for Memory Resource Controller can limit
 812                   the amount of memory used by kernel objects in the system. Those are
 813                   fundamentally different from the entities handled by the standard
 814                   Memory Controller, which are page-based, and can be swapped. Users of
 815                   the kmem extension can use it to guarantee that no group of processes
 816                   will ever exhaust kernel resources alone.
 817
 818         config KERNEL_CGROUP_PERF
 819                 bool "Enable perf_event per-cpu per-container group (cgroup) monitoring"
 820                 select KERNEL_PERF_EVENTS
 821                 help
 822                   This option extends the per-cpu mode to restrict monitoring to
 823                   threads which belong to the cgroup specified and run on the
 824                   designated cpu.
 825
 826         menuconfig KERNEL_CGROUP_SCHED
 827                 bool "Group CPU scheduler"
 828                 default y
 829                 help
 830                   This feature lets CPU scheduler recognize task groups and control CPU
 831                   bandwidth allocation to such task groups. It uses cgroups to group
 832                   tasks.
 833
 834         if KERNEL_CGROUP_SCHED
 835
 836                 config KERNEL_FAIR_GROUP_SCHED
 837                         bool "Group scheduling for SCHED_OTHER"
 838                         default y
 839
 840                 config KERNEL_CFS_BANDWIDTH
 841                         bool "CPU bandwidth provisioning for FAIR_GROUP_SCHED"
 842                         default y
 843                         depends on KERNEL_FAIR_GROUP_SCHED
 844                         help
 845                           This option allows users to define CPU bandwidth rates (limits) for
 846                           tasks running within the fair group scheduler.  Groups with no limit
 847                           set are considered to be unconstrained and will run with no
 848                           restriction.
 849                           See tip/Documentation/scheduler/sched-bwc.txt for more information.
 850
 851                 config KERNEL_RT_GROUP_SCHED
 852                         bool "Group scheduling for SCHED_RR/FIFO"
 853                         default y
 854                         help
 855                           This feature lets you explicitly allocate real CPU bandwidth
 856                           to task groups. If enabled, it will also make it impossible to
 857                           schedule realtime tasks for non-root users until you allocate
 858                           realtime bandwidth for them.
 859
 860         endif
 861
 862         config KERNEL_BLK_CGROUP
 863                 bool "Block IO controller"
 864                 default y
 865                 help
 866                   Generic block IO controller cgroup interface. This is the common
 867                   cgroup interface which should be used by various IO controlling
 868                   policies.
 869
 870                   Currently, CFQ IO scheduler uses it to recognize task groups and
 871                   control disk bandwidth allocation (proportional time slice allocation)
 872                   to such task groups. It is also used by bio throttling logic in
 873                   block layer to implement upper limit in IO rates on a device.
 874
 875                   This option only enables generic Block IO controller infrastructure.
 876                   One needs to also enable actual IO controlling logic/policy. For
 877                   enabling proportional weight division of disk bandwidth in CFQ, set
 878                   CONFIG_CFQ_GROUP_IOSCHED=y; for enabling throttling policy, set
 879                   CONFIG_BLK_DEV_THROTTLING=y.
 880
 881         if KERNEL_BLK_CGROUP
 882
 883                 config KERNEL_CFQ_GROUP_IOSCHED
 884                         bool "Proportional weight of disk bandwidth in CFQ"
 885
 886                 config KERNEL_BLK_DEV_THROTTLING
 887                         bool "Enable throttling policy"
 888                         default y
 889
 890                 config KERNEL_BLK_DEV_THROTTLING_LOW
 891                         bool "Block throttling .low limit interface support (EXPERIMENTAL)"
 892                         depends on KERNEL_BLK_DEV_THROTTLING
 893         endif
 894
 895         config KERNEL_DEBUG_BLK_CGROUP
 896                 bool "Enable Block IO controller debugging"
 897                 depends on KERNEL_BLK_CGROUP
 898                 help
 899                   Enable some debugging help. Currently it exports additional stat
 900                   files in a cgroup which can be useful for debugging.
 901
 902         config KERNEL_NET_CLS_CGROUP
 903                 bool "legacy Control Group Classifier"
 904
 905         config KERNEL_CGROUP_NET_CLASSID
 906                 bool "legacy Network classid cgroup"
 907
 908         config KERNEL_CGROUP_NET_PRIO
 909                 bool "legacy Network priority cgroup"
 910
 911 endif
 912
 913 #
 914 # Namespace support symbols
 915 #
 916
 917 config KERNEL_NAMESPACES
 918         bool "Enable kernel namespaces"
 919         default y if !SMALL_FLASH
 920
 921 if KERNEL_NAMESPACES
 922
 923         config KERNEL_UTS_NS
 924                 bool "UTS namespace"
 925                 default y
 926                 help
 927                   In this namespace, tasks see different info provided
 928                   with the uname() system call.
 929
 930         config KERNEL_IPC_NS
 931                 bool "IPC namespace"
 932                 default y
 933                 help
 934                   In this namespace, tasks work with IPC ids which correspond to
 935                   different IPC objects in different namespaces.
 936
 937         config KERNEL_USER_NS
 938                 bool "User namespace (EXPERIMENTAL)"
 939                 default y
 940                 help
 941                   This allows containers, i.e. vservers, to use user namespaces
 942                   to provide different user info for different servers.
 943
 944         config KERNEL_PID_NS
 945                 bool "PID Namespaces"
 946                 default y
 947                 help
 948                   Support process id namespaces. This allows having multiple
 949                   processes with the same pid as long as they are in different
 950                   pid namespaces. This is a building block of containers.
 951
 952         config KERNEL_NET_NS
 953                 bool "Network namespace"
 954                 default y
 955                 help
 956                   Allow user space to create what appear to be multiple instances
 957                   of the network stack.
 958
 959 endif
 960
 961 config KERNEL_DEVPTS_MULTIPLE_INSTANCES
 962         bool "Support multiple instances of devpts"
 963         default y if !SMALL_FLASH
 964         help
 965           Enable support for multiple instances of devpts filesystem.
 966           If you want to have isolated PTY namespaces (eg: in containers),
 967           say Y here. Otherwise, say N. If enabled, each mount of devpts
 968           filesystem with the '-o newinstance' option will create an
 969           independent PTY namespace.
 970
 971 config KERNEL_POSIX_MQUEUE
 972         bool "POSIX Message Queues"
 973         default y if !SMALL_FLASH
 974         help
 975           POSIX variant of message queues is a part of IPC. In POSIX message
 976           queues every message has a priority which decides about succession
 977           of receiving it by a process. If you want to compile and run
 978           programs written e.g. for Solaris with use of its POSIX message
 979           queues (functions mq_*) say Y here.
 980
 981           POSIX message queues are visible as a filesystem called 'mqueue'
 982           and can be mounted somewhere if you want to do filesystem
 983           operations on message queues.
 984
 985
 986 config KERNEL_SECCOMP_FILTER
 987         bool
 988         default y if !SMALL_FLASH
 989
 990 config KERNEL_SECCOMP
 991         bool "Enable seccomp support"
 992                 depends on !(TARGET_uml)
 993                 select KERNEL_SECCOMP_FILTER
 994                 default y if !SMALL_FLASH
 995                 help
 996                   Build kernel with support for seccomp.
 997
 998 #
 999 # IPv4 configuration
1000 #
1001
1002 config KERNEL_IP_MROUTE
1003         bool "Enable IPv4 multicast routing"
1004         default y
1005         help
1006           Multicast routing requires a multicast routing daemon in
1007           addition to kernel support.
1008
1009 if KERNEL_IP_MROUTE
1010
1011         config KERNEL_IP_MROUTE_MULTIPLE_TABLES
1012                 def_bool y
1013
1014         config KERNEL_IP_PIMSM_V1
1015                 def_bool y
1016
1017         config KERNEL_IP_PIMSM_V2
1018                 def_bool y
1019
1020 endif
1021
1022 #
1023 # IPv6 configuration
1024 #
1025
1026 config KERNEL_IPV6
1027         def_bool IPV6
1028
1029 if KERNEL_IPV6
1030
1031         config KERNEL_IPV6_MULTIPLE_TABLES
1032                 def_bool y
1033
1034         config KERNEL_IPV6_SUBTREES
1035                 def_bool y
1036
1037         config KERNEL_IPV6_MROUTE
1038                 bool "Enable IPv6 multicast routing"
1039                 default y
1040                 help
1041                   Multicast routing requires a multicast routing daemon in
1042                   addition to kernel support.
1043
1044         if KERNEL_IPV6_MROUTE
1045
1046                 config KERNEL_IPV6_MROUTE_MULTIPLE_TABLES
1047                         def_bool y
1048
1049                 config KERNEL_IPV6_PIMSM_V2
1050                         def_bool y
1051
1052         endif
1053
1054         config KERNEL_IPV6_SEG6_LWTUNNEL
1055                 bool "Enable support for lightweight tunnels"
1056                 default y if !SMALL_FLASH
1057                 help
1058                   Using lwtunnel (needed for IPv6 segment routing) requires ip-full package.
1059
1060         config KERNEL_LWTUNNEL_BPF
1061                 def_bool n
1062
1063 endif
1064
1065 #
1066 # Miscellaneous network configuration
1067 #
1068
1069 config KERNEL_NET_L3_MASTER_DEV
1070         bool "L3 Master device support"
1071         help
1072           This module provides glue between core networking code and device
1073           drivers to support L3 master devices like VRF.
1074
1075 config KERNEL_WIRELESS_EXT
1076         def_bool n
1077
1078 config KERNEL_WEXT_CORE
1079         def_bool KERNEL_WIRELESS_EXT
1080
1081 config KERNEL_WEXT_PRIV
1082         def_bool KERNEL_WIRELESS_EXT
1083
1084 config KERNEL_WEXT_PROC
1085         def_bool KERNEL_WIRELESS_EXT
1086
1087 config KERNEL_WEXT_SPY
1088         def_bool KERNEL_WIRELESS_EXT
1089
1090 config KERNEL_PAGE_POOL
1091         def_bool n
1092
1093 config KERNEL_PAGE_POOL_STATS
1094         bool "Page pool stats support"
1095         depends on KERNEL_PAGE_POOL
1096         depends on !LINUX_5_10
1097
1098 #
1099 # NFS related symbols
1100 #
1101 config KERNEL_IP_PNP
1102         bool "Compile the kernel with rootfs on NFS"
1103         help
1104            If you want to make your kernel boot off a NFS server as root
1105            filesystem, select Y here.
1106
1107 if KERNEL_IP_PNP
1108
1109         config KERNEL_IP_PNP_DHCP
1110                 def_bool y
1111
1112         config KERNEL_IP_PNP_BOOTP
1113                 def_bool n
1114
1115         config KERNEL_IP_PNP_RARP
1116                 def_bool n
1117
1118         config KERNEL_NFS_FS
1119                 def_bool y
1120
1121         config KERNEL_NFS_V2
1122                 def_bool y
1123
1124         config KERNEL_NFS_V3
1125                 def_bool y
1126
1127         config KERNEL_ROOT_NFS
1128                 def_bool y
1129
1130 endif
1131
1132 menu "Filesystem ACL and attr support options"
1133         config USE_FS_ACL_ATTR
1134                 bool "Use filesystem ACL and attr support by default"
1135                 help
1136                   Make using ACLs (e.g. POSIX ACL, NFSv4 ACL) the default
1137                   for kernel and packages, except tmpfs, flash filesystems,
1138                   and old NFS.  Also enable userspace extended attribute support
1139                   by default.  (OpenWrt already has an expection it will be
1140                   present in the kernel).
1141
1142         config KERNEL_FS_POSIX_ACL
1143                 bool "Enable POSIX ACL support"
1144                 default y if USE_FS_ACL_ATTR
1145
1146         config KERNEL_BTRFS_FS_POSIX_ACL
1147                 bool "Enable POSIX ACL for BtrFS Filesystems"
1148                 select KERNEL_FS_POSIX_ACL
1149                 default y if USE_FS_ACL_ATTR
1150
1151         config KERNEL_EXT4_FS_POSIX_ACL
1152                 bool "Enable POSIX ACL for Ext4 Filesystems"
1153                 select KERNEL_FS_POSIX_ACL
1154                 default y if USE_FS_ACL_ATTR
1155
1156         config KERNEL_F2FS_FS_POSIX_ACL
1157                 bool "Enable POSIX ACL for F2FS Filesystems"
1158                 select KERNEL_FS_POSIX_ACL
1159
1160         config KERNEL_JFFS2_FS_POSIX_ACL
1161                 bool "Enable POSIX ACL for JFFS2 Filesystems"
1162                 select KERNEL_FS_POSIX_ACL
1163
1164         config KERNEL_TMPFS_POSIX_ACL
1165                 bool "Enable POSIX ACL for TMPFS Filesystems"
1166                 select KERNEL_FS_POSIX_ACL
1167
1168         config KERNEL_CIFS_ACL
1169                 bool "Enable CIFS ACLs"
1170                 select KERNEL_FS_POSIX_ACL
1171                 default y if USE_FS_ACL_ATTR
1172
1173         config KERNEL_HFS_FS_POSIX_ACL
1174                 bool "Enable POSIX ACL for HFS Filesystems"
1175                 select KERNEL_FS_POSIX_ACL
1176                 default y if USE_FS_ACL_ATTR
1177
1178         config KERNEL_HFSPLUS_FS_POSIX_ACL
1179                 bool "Enable POSIX ACL for HFS+ Filesystems"
1180                 select KERNEL_FS_POSIX_ACL
1181                 default y if USE_FS_ACL_ATTR
1182
1183         config KERNEL_NFS_ACL_SUPPORT
1184                 bool "Enable ACLs for NFS"
1185                 default y if USE_FS_ACL_ATTR
1186
1187         config KERNEL_NFS_V3_ACL_SUPPORT
1188                 bool "Enable ACLs for NFSv3"
1189
1190         config KERNEL_NFSD_V2_ACL_SUPPORT
1191                 bool "Enable ACLs for NFSDv2"
1192
1193         config KERNEL_NFSD_V3_ACL_SUPPORT
1194                 bool "Enable ACLs for NFSDv3"
1195
1196         config KERNEL_REISER_FS_POSIX_ACL
1197                 bool "Enable POSIX ACLs for ReiserFS"
1198                 select KERNEL_FS_POSIX_ACL
1199                 default y if USE_FS_ACL_ATTR
1200
1201         config KERNEL_XFS_POSIX_ACL
1202                 bool "Enable POSIX ACLs for XFS"
1203                 select KERNEL_FS_POSIX_ACL
1204                 default y if USE_FS_ACL_ATTR
1205
1206         config KERNEL_JFS_POSIX_ACL
1207                 bool "Enable POSIX ACLs for JFS"
1208                 select KERNEL_FS_POSIX_ACL
1209                 default y if USE_FS_ACL_ATTR
1210
1211 endmenu
1212
1213 config KERNEL_DEVMEM
1214         bool "/dev/mem virtual device support"
1215         help
1216           Say Y here if you want to support the /dev/mem device.
1217           The /dev/mem device is used to access areas of physical
1218           memory.
1219
1220 config KERNEL_DEVKMEM
1221         bool "/dev/kmem virtual device support"
1222         help
1223           Say Y here if you want to support the /dev/kmem device. The
1224           /dev/kmem device is rarely used, but can be used for certain
1225           kind of kernel debugging operations.
1226
1227 config KERNEL_SQUASHFS_FRAGMENT_CACHE_SIZE
1228         int "Number of squashfs fragments cached"
1229         default 2 if (SMALL_FLASH && !LOW_MEMORY_FOOTPRINT)
1230         default 3
1231
1232 config KERNEL_SQUASHFS_XATTR
1233         bool "Squashfs XATTR support"
1234
1235 #
1236 # compile optimization setting
1237 #
1238 choice
1239         prompt "Compiler optimization level"
1240         default KERNEL_CC_OPTIMIZE_FOR_SIZE if SMALL_FLASH
1241
1242 config KERNEL_CC_OPTIMIZE_FOR_PERFORMANCE
1243         bool "Optimize for performance"
1244         help
1245           This is the default optimization level for the kernel, building
1246           with the "-O2" compiler flag for best performance and most
1247           helpful compile-time warnings.
1248
1249 config KERNEL_CC_OPTIMIZE_FOR_SIZE
1250         bool "Optimize for size"
1251         help
1252           Enabling this option will pass "-Os" instead of "-O2" to
1253           your compiler resulting in a smaller kernel.
1254
1255 endchoice
1256
1257 config KERNEL_AUDIT
1258         bool "Auditing support"
1259
1260 config KERNEL_SECURITY
1261         bool "Enable different security models"
1262
1263 config KERNEL_SECURITY_NETWORK
1264         bool "Socket and Networking Security Hooks"
1265         select KERNEL_SECURITY
1266
1267 config KERNEL_SECURITY_SELINUX
1268         bool "NSA SELinux Support"
1269         select KERNEL_SECURITY_NETWORK
1270         select KERNEL_AUDIT
1271
1272 config KERNEL_SECURITY_SELINUX_BOOTPARAM
1273         bool "NSA SELinux boot parameter"
1274         depends on KERNEL_SECURITY_SELINUX
1275         default y
1276
1277 config KERNEL_SECURITY_SELINUX_DISABLE
1278         bool "NSA SELinux runtime disable"
1279         depends on KERNEL_SECURITY_SELINUX
1280
1281 config KERNEL_SECURITY_SELINUX_DEVELOP
1282         bool "NSA SELinux Development Support"
1283         depends on KERNEL_SECURITY_SELINUX
1284         default y
1285
1286 config KERNEL_SECURITY_SELINUX_SIDTAB_HASH_BITS
1287         int
1288         depends on KERNEL_SECURITY_SELINUX
1289         default 9
1290
1291 config KERNEL_SECURITY_SELINUX_SID2STR_CACHE_SIZE
1292         int
1293         depends on KERNEL_SECURITY_SELINUX
1294         default 256
1295
1296 config KERNEL_LSM
1297         string
1298         default "lockdown,yama,loadpin,safesetid,integrity,selinux"
1299         depends on KERNEL_SECURITY_SELINUX
1300
1301 config KERNEL_EXT4_FS_SECURITY
1302         bool "Ext4 Security Labels"
1303
1304 config KERNEL_F2FS_FS_SECURITY
1305         bool "F2FS Security Labels"
1306
1307 config KERNEL_UBIFS_FS_SECURITY
1308         bool "UBIFS Security Labels"
1309
1310 config KERNEL_JFFS2_FS_SECURITY
1311         bool "JFFS2 Security Labels"