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         default n
 465
 466 config KERNEL_AIO
 467         bool "Compile the kernel with asynchronous IO support"
 468         default y if !SMALL_FLASH
 469
 470 config KERNEL_IO_URING
 471         bool "Compile the kernel with io_uring support"
 472         default y if !SMALL_FLASH
 473
 474 config KERNEL_FHANDLE
 475         bool "Compile the kernel with support for fhandle syscalls"
 476         default y if !SMALL_FLASH
 477
 478 config KERNEL_FANOTIFY
 479         bool "Compile the kernel with modern file notification support"
 480         default y if !SMALL_FLASH
 481
 482 config KERNEL_BLK_DEV_BSG
 483         bool "Compile the kernel with SCSI generic v4 support for any block device"
 484
 485 config KERNEL_TRANSPARENT_HUGEPAGE
 486         bool
 487
 488 choice
 489         prompt "Transparent Hugepage Support sysfs defaults"
 490         depends on KERNEL_TRANSPARENT_HUGEPAGE
 491         default KERNEL_TRANSPARENT_HUGEPAGE_ALWAYS
 492
 493         config KERNEL_TRANSPARENT_HUGEPAGE_ALWAYS
 494                 bool "always"
 495
 496         config KERNEL_TRANSPARENT_HUGEPAGE_MADVISE
 497                 bool "madvise"
 498 endchoice
 499
 500 config KERNEL_HUGETLBFS
 501         bool
 502
 503 config KERNEL_HUGETLB_PAGE
 504         bool "Compile the kernel with HugeTLB support"
 505         select KERNEL_TRANSPARENT_HUGEPAGE
 506         select KERNEL_HUGETLBFS
 507
 508 config KERNEL_MAGIC_SYSRQ
 509         bool "Compile the kernel with SysRq support"
 510         default y
 511
 512 config KERNEL_DEBUG_PINCTRL
 513         bool "Compile the kernel with pinctrl debugging"
 514         select KERNEL_DEBUG_KERNEL
 515
 516 config KERNEL_DEBUG_GPIO
 517         bool "Compile the kernel with gpio debugging"
 518         select KERNEL_DEBUG_KERNEL
 519
 520 config KERNEL_COREDUMP
 521         bool
 522
 523 config KERNEL_ELF_CORE
 524         bool "Enable process core dump support"
 525         select KERNEL_COREDUMP
 526         default y if !SMALL_FLASH
 527
 528 config KERNEL_PROVE_LOCKING
 529         bool "Enable kernel lock checking"
 530         select KERNEL_DEBUG_KERNEL
 531
 532 config KERNEL_SOFTLOCKUP_DETECTOR
 533         bool "Compile the kernel with detect Soft Lockups"
 534         depends on KERNEL_DEBUG_KERNEL
 535         help
 536           Say Y here to enable the kernel to act as a watchdog to detect
 537           soft lockups.
 538
 539           Softlockups are bugs that cause the kernel to loop in kernel
 540           mode for more than 20 seconds, without giving other tasks a
 541           chance to run.  The current stack trace is displayed upon
 542           detection and the system will stay locked up.
 543
 544 config KERNEL_DETECT_HUNG_TASK
 545         bool "Compile the kernel with detect Hung Tasks"
 546         depends on KERNEL_DEBUG_KERNEL
 547         default KERNEL_SOFTLOCKUP_DETECTOR
 548         help
 549           Say Y here to enable the kernel to detect "hung tasks",
 550           which are bugs that cause the task to be stuck in
 551           uninterruptible "D" state indefinitely.
 552
 553           When a hung task is detected, the kernel will print the
 554           current stack trace (which you should report), but the
 555           task will stay in uninterruptible state. If lockdep is
 556           enabled then all held locks will also be reported. This
 557           feature has negligible overhead.
 558
 559 config KERNEL_WQ_WATCHDOG
 560         bool "Compile the kernel with detect Workqueue Stalls"
 561         depends on KERNEL_DEBUG_KERNEL
 562         help
 563           Say Y here to enable stall detection on workqueues.  If a
 564           worker pool doesn't make forward progress on a pending work
 565           item for over a given amount of time, 30s by default, a
 566           warning message is printed along with dump of workqueue
 567           state.  This can be configured through kernel parameter
 568           "workqueue.watchdog_thresh" and its sysfs counterpart.
 569
 570 config KERNEL_DEBUG_ATOMIC_SLEEP
 571         bool "Compile the kernel with sleep inside atomic section checking"
 572         depends on KERNEL_DEBUG_KERNEL
 573         help
 574           If you say Y here, various routines which may sleep will become very
 575           noisy if they are called inside atomic sections: when a spinlock is
 576           held, inside an rcu read side critical section, inside preempt disabled
 577           sections, inside an interrupt, etc...
 578
 579 config KERNEL_DEBUG_VM
 580         bool "Compile the kernel with debug VM"
 581         depends on KERNEL_DEBUG_KERNEL
 582         help
 583           Enable this to turn on extended checks in the virtual-memory system
 584           that may impact performance.
 585
 586           If unsure, say N.
 587
 588 config KERNEL_PRINTK_TIME
 589         bool "Enable printk timestamps"
 590         default y
 591
 592 config KERNEL_SLUB_DEBUG
 593         bool
 594
 595 config KERNEL_SLUB_DEBUG_ON
 596         bool
 597
 598 config KERNEL_SLABINFO
 599         select KERNEL_SLUB_DEBUG
 600         select KERNEL_SLUB_DEBUG_ON
 601         bool "Enable /proc slab debug info"
 602
 603 config KERNEL_PROC_PAGE_MONITOR
 604         bool "Enable /proc page monitoring"
 605
 606 config KERNEL_RELAY
 607         bool
 608
 609 config KERNEL_KEXEC
 610         bool "Enable kexec support"
 611
 612 config KERNEL_PROC_VMCORE
 613         bool
 614
 615 config KERNEL_PROC_KCORE
 616         bool
 617
 618 config KERNEL_CRASH_DUMP
 619         depends on i386 || x86_64 || arm || armeb
 620         select KERNEL_KEXEC
 621         select KERNEL_PROC_VMCORE
 622         select KERNEL_PROC_KCORE
 623         bool "Enable support for kexec crashdump"
 624         default y
 625
 626 config USE_RFKILL
 627         bool "Enable rfkill support"
 628         default RFKILL_SUPPORT
 629
 630 config USE_SPARSE
 631         bool "Enable sparse check during kernel build"
 632
 633 config KERNEL_DEVTMPFS
 634         bool "Compile the kernel with device tmpfs enabled"
 635         help
 636           devtmpfs is a simple, kernel-managed /dev filesystem. The kernel creates
 637           devices nodes for all registered devices to simplify boot, but leaves more
 638           complex tasks to userspace (e.g. udev).
 639
 640 if KERNEL_DEVTMPFS
 641
 642         config KERNEL_DEVTMPFS_MOUNT
 643                 bool "Automatically mount devtmpfs after root filesystem is mounted"
 644
 645 endif
 646
 647 config KERNEL_KEYS
 648         bool "Enable kernel access key retention support"
 649         default !SMALL_FLASH
 650
 651 config KERNEL_PERSISTENT_KEYRINGS
 652         bool "Enable kernel persistent keyrings"
 653         depends on KERNEL_KEYS
 654
 655 config KERNEL_KEYS_REQUEST_CACHE
 656         bool "Enable temporary caching of the last request_key() result"
 657         depends on KERNEL_KEYS
 658
 659 config KERNEL_BIG_KEYS
 660         bool "Enable large payload keys on kernel keyrings"
 661         depends on KERNEL_KEYS
 662
 663 #
 664 # CGROUP support symbols
 665 #
 666
 667 config KERNEL_CGROUPS
 668         bool "Enable kernel cgroups"
 669         default y if !SMALL_FLASH
 670
 671 if KERNEL_CGROUPS
 672
 673         config KERNEL_CGROUP_DEBUG
 674                 bool "Example debug cgroup subsystem"
 675                 help
 676                   This option enables a simple cgroup subsystem that
 677                   exports useful debugging information about the cgroups
 678                   framework.
 679
 680         config KERNEL_FREEZER
 681                 bool
 682
 683         config KERNEL_CGROUP_FREEZER
 684                 bool "legacy Freezer cgroup subsystem"
 685                 select KERNEL_FREEZER
 686                 help
 687                   Provides a way to freeze and unfreeze all tasks in a
 688                   cgroup.
 689                   (legacy cgroup1-only controller, in cgroup2 freezer
 690                   is integrated in the Memory controller)
 691
 692         config KERNEL_CGROUP_DEVICE
 693                 bool "legacy Device controller for cgroups"
 694                 help
 695                   Provides a cgroup implementing whitelists for devices which
 696                   a process in the cgroup can mknod or open.
 697                   (legacy cgroup1-only controller)
 698
 699         config KERNEL_CGROUP_HUGETLB
 700                 bool "HugeTLB controller"
 701                 select KERNEL_HUGETLB_PAGE
 702
 703         config KERNEL_CGROUP_PIDS
 704                 bool "PIDs cgroup subsystem"
 705                 default y
 706                 help
 707                   Provides enforcement of process number limits in the scope of a
 708                   cgroup.
 709
 710         config KERNEL_CGROUP_RDMA
 711                 bool "RDMA controller for cgroups"
 712                 default y
 713
 714         config KERNEL_CGROUP_BPF
 715                 bool "Support for eBPF programs attached to cgroups"
 716                 default y
 717
 718         config KERNEL_CPUSETS
 719                 bool "Cpuset support"
 720                 default y
 721                 help
 722                   This option will let you create and manage CPUSETs which
 723                   allow dynamically partitioning a system into sets of CPUs and
 724                   Memory Nodes and assigning tasks to run only within those sets.
 725                   This is primarily useful on large SMP or NUMA systems.
 726
 727         config KERNEL_PROC_PID_CPUSET
 728                 bool "Include legacy /proc/<pid>/cpuset file"
 729                 depends on KERNEL_CPUSETS
 730
 731         config KERNEL_CGROUP_CPUACCT
 732                 bool "Simple CPU accounting cgroup subsystem"
 733                 default y
 734                 help
 735                   Provides a simple Resource Controller for monitoring the
 736                   total CPU consumed by the tasks in a cgroup.
 737
 738         config KERNEL_RESOURCE_COUNTERS
 739                 bool "Resource counters"
 740                 default y
 741                 help
 742                   This option enables controller independent resource accounting
 743                   infrastructure that works with cgroups.
 744
 745         config KERNEL_MM_OWNER
 746                 bool
 747                 default y if KERNEL_MEMCG
 748
 749         config KERNEL_MEMCG
 750                 bool "Memory Resource Controller for Control Groups"
 751                 default y
 752                 select KERNEL_FREEZER
 753                 depends on KERNEL_RESOURCE_COUNTERS
 754                 help
 755                   Provides a memory resource controller that manages both anonymous
 756                   memory and page cache. (See Documentation/cgroups/memory.txt)
 757
 758                   Note that setting this option increases fixed memory overhead
 759                   associated with each page of memory in the system. By this,
 760                   20(40)bytes/PAGE_SIZE on 32(64)bit system will be occupied by memory
 761                   usage tracking struct at boot. Total amount of this is printed out
 762                   at boot.
 763
 764                   Only enable when you're ok with these tradeoffs and really
 765                   sure you need the memory resource controller. Even when you enable
 766                   this, you can set "cgroup_disable=memory" at your boot option to
 767                   disable memory resource controller and you can avoid overheads
 768                   (but lose benefits of memory resource controller).
 769
 770                   This config option also selects MM_OWNER config option, which
 771                   could in turn add some fork/exit overhead.
 772
 773         config KERNEL_MEMCG_SWAP
 774                 bool "Memory Resource Controller Swap Extension"
 775                 default y
 776                 depends on KERNEL_MEMCG
 777                 help
 778                   Add swap management feature to memory resource controller. When you
 779                   enable this, you can limit mem+swap usage per cgroup. In other words,
 780                   when you disable this, memory resource controller has no cares to
 781                   usage of swap...a process can exhaust all of the swap. This extension
 782                   is useful when you want to avoid exhaustion swap but this itself
 783                   adds more overheads and consumes memory for remembering information.
 784                   Especially if you use 32bit system or small memory system, please
 785                   be careful about enabling this. When memory resource controller
 786                   is disabled by boot option, this will be automatically disabled and
 787                   there will be no overhead from this. Even when you set this config=y,
 788                   if boot option "swapaccount=0" is set, swap will not be accounted.
 789                   Now, memory usage of swap_cgroup is 2 bytes per entry. If swap page
 790                   size is 4096bytes, 512k per 1Gbytes of swap.
 791
 792         config KERNEL_MEMCG_SWAP_ENABLED
 793                 bool "Memory Resource Controller Swap Extension enabled by default"
 794                 depends on KERNEL_MEMCG_SWAP
 795                 help
 796                   Memory Resource Controller Swap Extension comes with its price in
 797                   a bigger memory consumption. General purpose distribution kernels
 798                   which want to enable the feature but keep it disabled by default
 799                   and let the user enable it by swapaccount boot command line
 800                   parameter should have this option unselected.
 801
 802                   Those who want to have the feature enabled by default should
 803                   select this option (if, for some reason, they need to disable it,
 804                   then swapaccount=0 does the trick).
 805
 806
 807         config KERNEL_MEMCG_KMEM
 808                 bool "Memory Resource Controller Kernel Memory accounting (EXPERIMENTAL)"
 809                 default y
 810                 depends on KERNEL_MEMCG
 811                 help
 812                   The Kernel Memory extension for Memory Resource Controller can limit
 813                   the amount of memory used by kernel objects in the system. Those are
 814                   fundamentally different from the entities handled by the standard
 815                   Memory Controller, which are page-based, and can be swapped. Users of
 816                   the kmem extension can use it to guarantee that no group of processes
 817                   will ever exhaust kernel resources alone.
 818
 819         config KERNEL_CGROUP_PERF
 820                 bool "Enable perf_event per-cpu per-container group (cgroup) monitoring"
 821                 select KERNEL_PERF_EVENTS
 822                 help
 823                   This option extends the per-cpu mode to restrict monitoring to
 824                   threads which belong to the cgroup specified and run on the
 825                   designated cpu.
 826
 827         menuconfig KERNEL_CGROUP_SCHED
 828                 bool "Group CPU scheduler"
 829                 default y
 830                 help
 831                   This feature lets CPU scheduler recognize task groups and control CPU
 832                   bandwidth allocation to such task groups. It uses cgroups to group
 833                   tasks.
 834
 835         if KERNEL_CGROUP_SCHED
 836
 837                 config KERNEL_FAIR_GROUP_SCHED
 838                         bool "Group scheduling for SCHED_OTHER"
 839                         default y
 840
 841                 config KERNEL_CFS_BANDWIDTH
 842                         bool "CPU bandwidth provisioning for FAIR_GROUP_SCHED"
 843                         default y
 844                         depends on KERNEL_FAIR_GROUP_SCHED
 845                         help
 846                           This option allows users to define CPU bandwidth rates (limits) for
 847                           tasks running within the fair group scheduler.  Groups with no limit
 848                           set are considered to be unconstrained and will run with no
 849                           restriction.
 850                           See tip/Documentation/scheduler/sched-bwc.txt for more information.
 851
 852                 config KERNEL_RT_GROUP_SCHED
 853                         bool "Group scheduling for SCHED_RR/FIFO"
 854                         default y
 855                         help
 856                           This feature lets you explicitly allocate real CPU bandwidth
 857                           to task groups. If enabled, it will also make it impossible to
 858                           schedule realtime tasks for non-root users until you allocate
 859                           realtime bandwidth for them.
 860
 861         endif
 862
 863         config KERNEL_BLK_CGROUP
 864                 bool "Block IO controller"
 865                 default y
 866                 help
 867                   Generic block IO controller cgroup interface. This is the common
 868                   cgroup interface which should be used by various IO controlling
 869                   policies.
 870
 871                   Currently, CFQ IO scheduler uses it to recognize task groups and
 872                   control disk bandwidth allocation (proportional time slice allocation)
 873                   to such task groups. It is also used by bio throttling logic in
 874                   block layer to implement upper limit in IO rates on a device.
 875
 876                   This option only enables generic Block IO controller infrastructure.
 877                   One needs to also enable actual IO controlling logic/policy. For
 878                   enabling proportional weight division of disk bandwidth in CFQ, set
 879                   CONFIG_CFQ_GROUP_IOSCHED=y; for enabling throttling policy, set
 880                   CONFIG_BLK_DEV_THROTTLING=y.
 881
 882         if KERNEL_BLK_CGROUP
 883
 884                 config KERNEL_CFQ_GROUP_IOSCHED
 885                         bool "Proportional weight of disk bandwidth in CFQ"
 886
 887                 config KERNEL_BLK_DEV_THROTTLING
 888                         bool "Enable throttling policy"
 889                         default y
 890
 891                 config KERNEL_BLK_DEV_THROTTLING_LOW
 892                         bool "Block throttling .low limit interface support (EXPERIMENTAL)"
 893                         depends on KERNEL_BLK_DEV_THROTTLING
 894         endif
 895
 896         config KERNEL_DEBUG_BLK_CGROUP
 897                 bool "Enable Block IO controller debugging"
 898                 depends on KERNEL_BLK_CGROUP
 899                 help
 900                   Enable some debugging help. Currently it exports additional stat
 901                   files in a cgroup which can be useful for debugging.
 902
 903         config KERNEL_NET_CLS_CGROUP
 904                 bool "legacy Control Group Classifier"
 905
 906         config KERNEL_CGROUP_NET_CLASSID
 907                 bool "legacy Network classid cgroup"
 908
 909         config KERNEL_CGROUP_NET_PRIO
 910                 bool "legacy Network priority cgroup"
 911
 912 endif
 913
 914 #
 915 # Namespace support symbols
 916 #
 917
 918 config KERNEL_NAMESPACES
 919         bool "Enable kernel namespaces"
 920         default y if !SMALL_FLASH
 921
 922 if KERNEL_NAMESPACES
 923
 924         config KERNEL_UTS_NS
 925                 bool "UTS namespace"
 926                 default y
 927                 help
 928                   In this namespace, tasks see different info provided
 929                   with the uname() system call.
 930
 931         config KERNEL_IPC_NS
 932                 bool "IPC namespace"
 933                 default y
 934                 help
 935                   In this namespace, tasks work with IPC ids which correspond to
 936                   different IPC objects in different namespaces.
 937
 938         config KERNEL_USER_NS
 939                 bool "User namespace (EXPERIMENTAL)"
 940                 default y
 941                 help
 942                   This allows containers, i.e. vservers, to use user namespaces
 943                   to provide different user info for different servers.
 944
 945         config KERNEL_PID_NS
 946                 bool "PID Namespaces"
 947                 default y
 948                 help
 949                   Support process id namespaces. This allows having multiple
 950                   processes with the same pid as long as they are in different
 951                   pid namespaces. This is a building block of containers.
 952
 953         config KERNEL_NET_NS
 954                 bool "Network namespace"
 955                 default y
 956                 help
 957                   Allow user space to create what appear to be multiple instances
 958                   of the network stack.
 959
 960 endif
 961
 962 config KERNEL_DEVPTS_MULTIPLE_INSTANCES
 963         bool "Support multiple instances of devpts"
 964         default y if !SMALL_FLASH
 965         help
 966           Enable support for multiple instances of devpts filesystem.
 967           If you want to have isolated PTY namespaces (eg: in containers),
 968           say Y here. Otherwise, say N. If enabled, each mount of devpts
 969           filesystem with the '-o newinstance' option will create an
 970           independent PTY namespace.
 971
 972 config KERNEL_POSIX_MQUEUE
 973         bool "POSIX Message Queues"
 974         default y if !SMALL_FLASH
 975         help
 976           POSIX variant of message queues is a part of IPC. In POSIX message
 977           queues every message has a priority which decides about succession
 978           of receiving it by a process. If you want to compile and run
 979           programs written e.g. for Solaris with use of its POSIX message
 980           queues (functions mq_*) say Y here.
 981
 982           POSIX message queues are visible as a filesystem called 'mqueue'
 983           and can be mounted somewhere if you want to do filesystem
 984           operations on message queues.
 985
 986
 987 config KERNEL_SECCOMP_FILTER
 988         bool
 989         default y if !SMALL_FLASH
 990
 991 config KERNEL_SECCOMP
 992         bool "Enable seccomp support"
 993                 depends on !(TARGET_uml)
 994                 select KERNEL_SECCOMP_FILTER
 995                 default y if !SMALL_FLASH
 996                 help
 997                   Build kernel with support for seccomp.
 998
 999 #
1000 # IPv4 configuration
1001 #
1002
1003 config KERNEL_IP_MROUTE
1004         bool "Enable IPv4 multicast routing"
1005         default y
1006         help
1007           Multicast routing requires a multicast routing daemon in
1008           addition to kernel support.
1009
1010 if KERNEL_IP_MROUTE
1011
1012         config KERNEL_IP_MROUTE_MULTIPLE_TABLES
1013                 def_bool y
1014
1015         config KERNEL_IP_PIMSM_V1
1016                 def_bool y
1017
1018         config KERNEL_IP_PIMSM_V2
1019                 def_bool y
1020
1021 endif
1022
1023 #
1024 # IPv6 configuration
1025 #
1026
1027 config KERNEL_IPV6
1028         def_bool IPV6
1029
1030 if KERNEL_IPV6
1031
1032         config KERNEL_IPV6_MULTIPLE_TABLES
1033                 def_bool y
1034
1035         config KERNEL_IPV6_SUBTREES
1036                 def_bool y
1037
1038         config KERNEL_IPV6_MROUTE
1039                 bool "Enable IPv6 multicast routing"
1040                 default y
1041                 help
1042                   Multicast routing requires a multicast routing daemon in
1043                   addition to kernel support.
1044
1045         if KERNEL_IPV6_MROUTE
1046
1047                 config KERNEL_IPV6_MROUTE_MULTIPLE_TABLES
1048                         def_bool y
1049
1050                 config KERNEL_IPV6_PIMSM_V2
1051                         def_bool y
1052
1053         endif
1054
1055         config KERNEL_IPV6_SEG6_LWTUNNEL
1056                 bool "Enable support for lightweight tunnels"
1057                 default y if !SMALL_FLASH
1058                 help
1059                   Using lwtunnel (needed for IPv6 segment routing) requires ip-full package.
1060
1061         config KERNEL_LWTUNNEL_BPF
1062                 def_bool n
1063
1064 endif
1065
1066 #
1067 # Miscellaneous network configuration
1068 #
1069
1070 config KERNEL_NET_L3_MASTER_DEV
1071         bool "L3 Master device support"
1072         help
1073           This module provides glue between core networking code and device
1074           drivers to support L3 master devices like VRF.
1075
1076 config KERNEL_WIRELESS_EXT
1077         def_bool n
1078
1079 config KERNEL_WEXT_CORE
1080         def_bool KERNEL_WIRELESS_EXT
1081
1082 config KERNEL_WEXT_PRIV
1083         def_bool KERNEL_WIRELESS_EXT
1084
1085 config KERNEL_WEXT_PROC
1086         def_bool KERNEL_WIRELESS_EXT
1087
1088 config KERNEL_WEXT_SPY
1089         def_bool KERNEL_WIRELESS_EXT
1090
1091 config KERNEL_PAGE_POOL
1092         def_bool n
1093
1094 config KERNEL_PAGE_POOL_STATS
1095         bool "Page pool stats support"
1096         depends on KERNEL_PAGE_POOL
1097         depends on !LINUX_5_10
1098
1099 #
1100 # NFS related symbols
1101 #
1102 config KERNEL_IP_PNP
1103         bool "Compile the kernel with rootfs on NFS"
1104         help
1105            If you want to make your kernel boot off a NFS server as root
1106            filesystem, select Y here.
1107
1108 if KERNEL_IP_PNP
1109
1110         config KERNEL_IP_PNP_DHCP
1111                 def_bool y
1112
1113         config KERNEL_IP_PNP_BOOTP
1114                 def_bool n
1115
1116         config KERNEL_IP_PNP_RARP
1117                 def_bool n
1118
1119         config KERNEL_NFS_FS
1120                 def_bool y
1121
1122         config KERNEL_NFS_V2
1123                 def_bool y
1124
1125         config KERNEL_NFS_V3
1126                 def_bool y
1127
1128         config KERNEL_ROOT_NFS
1129                 def_bool y
1130
1131 endif
1132
1133 menu "Filesystem ACL and attr support options"
1134         config USE_FS_ACL_ATTR
1135                 bool "Use filesystem ACL and attr support by default"
1136                 help
1137                   Make using ACLs (e.g. POSIX ACL, NFSv4 ACL) the default
1138                   for kernel and packages, except tmpfs, flash filesystems,
1139                   and old NFS.  Also enable userspace extended attribute support
1140                   by default.  (OpenWrt already has an expection it will be
1141                   present in the kernel).
1142
1143         config KERNEL_FS_POSIX_ACL
1144                 bool "Enable POSIX ACL support"
1145                 default y if USE_FS_ACL_ATTR
1146
1147         config KERNEL_BTRFS_FS_POSIX_ACL
1148                 bool "Enable POSIX ACL for BtrFS Filesystems"
1149                 select KERNEL_FS_POSIX_ACL
1150                 default y if USE_FS_ACL_ATTR
1151
1152         config KERNEL_EXT4_FS_POSIX_ACL
1153                 bool "Enable POSIX ACL for Ext4 Filesystems"
1154                 select KERNEL_FS_POSIX_ACL
1155                 default y if USE_FS_ACL_ATTR
1156
1157         config KERNEL_F2FS_FS_POSIX_ACL
1158                 bool "Enable POSIX ACL for F2FS Filesystems"
1159                 select KERNEL_FS_POSIX_ACL
1160
1161         config KERNEL_JFFS2_FS_POSIX_ACL
1162                 bool "Enable POSIX ACL for JFFS2 Filesystems"
1163                 select KERNEL_FS_POSIX_ACL
1164
1165         config KERNEL_TMPFS_POSIX_ACL
1166                 bool "Enable POSIX ACL for TMPFS Filesystems"
1167                 select KERNEL_FS_POSIX_ACL
1168
1169         config KERNEL_CIFS_ACL
1170                 bool "Enable CIFS ACLs"
1171                 select KERNEL_FS_POSIX_ACL
1172                 default y if USE_FS_ACL_ATTR
1173
1174         config KERNEL_HFS_FS_POSIX_ACL
1175                 bool "Enable POSIX ACL for HFS Filesystems"
1176                 select KERNEL_FS_POSIX_ACL
1177                 default y if USE_FS_ACL_ATTR
1178
1179         config KERNEL_HFSPLUS_FS_POSIX_ACL
1180                 bool "Enable POSIX ACL for HFS+ Filesystems"
1181                 select KERNEL_FS_POSIX_ACL
1182                 default y if USE_FS_ACL_ATTR
1183
1184         config KERNEL_NFS_ACL_SUPPORT
1185                 bool "Enable ACLs for NFS"
1186                 default y if USE_FS_ACL_ATTR
1187
1188         config KERNEL_NFS_V3_ACL_SUPPORT
1189                 bool "Enable ACLs for NFSv3"
1190
1191         config KERNEL_NFSD_V2_ACL_SUPPORT
1192                 bool "Enable ACLs for NFSDv2"
1193
1194         config KERNEL_NFSD_V3_ACL_SUPPORT
1195                 bool "Enable ACLs for NFSDv3"
1196
1197         config KERNEL_REISER_FS_POSIX_ACL
1198                 bool "Enable POSIX ACLs for ReiserFS"
1199                 select KERNEL_FS_POSIX_ACL
1200                 default y if USE_FS_ACL_ATTR
1201
1202         config KERNEL_XFS_POSIX_ACL
1203                 bool "Enable POSIX ACLs for XFS"
1204                 select KERNEL_FS_POSIX_ACL
1205                 default y if USE_FS_ACL_ATTR
1206
1207         config KERNEL_JFS_POSIX_ACL
1208                 bool "Enable POSIX ACLs for JFS"
1209                 select KERNEL_FS_POSIX_ACL
1210                 default y if USE_FS_ACL_ATTR
1211
1212 endmenu
1213
1214 config KERNEL_DEVMEM
1215         bool "/dev/mem virtual device support"
1216         help
1217           Say Y here if you want to support the /dev/mem device.
1218           The /dev/mem device is used to access areas of physical
1219           memory.
1220
1221 config KERNEL_DEVKMEM
1222         bool "/dev/kmem virtual device support"
1223         help
1224           Say Y here if you want to support the /dev/kmem device. The
1225           /dev/kmem device is rarely used, but can be used for certain
1226           kind of kernel debugging operations.
1227
1228 config KERNEL_SQUASHFS_FRAGMENT_CACHE_SIZE
1229         int "Number of squashfs fragments cached"
1230         default 2 if (SMALL_FLASH && !LOW_MEMORY_FOOTPRINT)
1231         default 3
1232
1233 config KERNEL_SQUASHFS_XATTR
1234         bool "Squashfs XATTR support"
1235
1236 #
1237 # compile optimization setting
1238 #
1239 choice
1240         prompt "Compiler optimization level"
1241         default KERNEL_CC_OPTIMIZE_FOR_SIZE if SMALL_FLASH
1242
1243 config KERNEL_CC_OPTIMIZE_FOR_PERFORMANCE
1244         bool "Optimize for performance"
1245         help
1246           This is the default optimization level for the kernel, building
1247           with the "-O2" compiler flag for best performance and most
1248           helpful compile-time warnings.
1249
1250 config KERNEL_CC_OPTIMIZE_FOR_SIZE
1251         bool "Optimize for size"
1252         help
1253           Enabling this option will pass "-Os" instead of "-O2" to
1254           your compiler resulting in a smaller kernel.
1255
1256 endchoice
1257
1258 config KERNEL_AUDIT
1259         bool "Auditing support"
1260
1261 config KERNEL_SECURITY
1262         bool "Enable different security models"
1263
1264 config KERNEL_SECURITY_NETWORK
1265         bool "Socket and Networking Security Hooks"
1266         select KERNEL_SECURITY
1267
1268 config KERNEL_SECURITY_SELINUX
1269         bool "NSA SELinux Support"
1270         select KERNEL_SECURITY_NETWORK
1271         select KERNEL_AUDIT
1272
1273 config KERNEL_SECURITY_SELINUX_BOOTPARAM
1274         bool "NSA SELinux boot parameter"
1275         depends on KERNEL_SECURITY_SELINUX
1276         default y
1277
1278 config KERNEL_SECURITY_SELINUX_DISABLE
1279         bool "NSA SELinux runtime disable"
1280         depends on KERNEL_SECURITY_SELINUX
1281
1282 config KERNEL_SECURITY_SELINUX_DEVELOP
1283         bool "NSA SELinux Development Support"
1284         depends on KERNEL_SECURITY_SELINUX
1285         default y
1286
1287 config KERNEL_SECURITY_SELINUX_SIDTAB_HASH_BITS
1288         int
1289         depends on KERNEL_SECURITY_SELINUX
1290         default 9
1291
1292 config KERNEL_SECURITY_SELINUX_SID2STR_CACHE_SIZE
1293         int
1294         depends on KERNEL_SECURITY_SELINUX
1295         default 256
1296
1297 config KERNEL_LSM
1298         string
1299         default "lockdown,yama,loadpin,safesetid,integrity,selinux"
1300         depends on KERNEL_SECURITY_SELINUX
1301
1302 config KERNEL_EXT4_FS_SECURITY
1303         bool "Ext4 Security Labels"
1304
1305 config KERNEL_F2FS_FS_SECURITY
1306         bool "F2FS Security Labels"
1307
1308 config KERNEL_UBIFS_FS_SECURITY
1309         bool "UBIFS Security Labels"
1310
1311 config KERNEL_JFFS2_FS_SECURITY
1312         bool "JFFS2 Security Labels"