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_MODULE_ALLOW_BTF_MISMATCH
 377         bool "Allow loading modules with non-matching BTF type info"
 378         depends on KERNEL_DEBUG_INFO_BTF
 379         help
 380           For modules whose split BTF does not match vmlinux, load without
 381           BTF rather than refusing to load. The default behavior with
 382           module BTF enabled is to reject modules with such mismatches;
 383           this option will still load module BTF where possible but ignore
 384           it when a mismatch is found.
 385
 386 config KERNEL_DEBUG_INFO_REDUCED
 387         bool "Reduce debugging information"
 388         default y
 389         depends on KERNEL_DEBUG_INFO
 390         help
 391           If you say Y here gcc is instructed to generate less debugging
 392           information for structure types. This means that tools that
 393           need full debugging information (like kgdb or systemtap) won't
 394           be happy. But if you merely need debugging information to
 395           resolve line numbers there is no loss. Advantage is that
 396           build directory object sizes shrink dramatically over a full
 397           DEBUG_INFO build and compile times are reduced too.
 398           Only works with newer gcc versions.
 399
 400 # KERNEL_DEBUG_LL symbols must have the default value set as otherwise
 401 # KConfig wont evaluate them unless KERNEL_EARLY_PRINTK is selected
 402 # which means that buildroot wont override the DEBUG_LL symbols in target
 403 # kernel configurations and lead to devices that dont have working console
 404 config KERNEL_DEBUG_LL_UART_NONE
 405         bool
 406         default n
 407         depends on arm
 408
 409 config KERNEL_DEBUG_LL
 410         bool
 411         default n
 412         depends on arm
 413         select KERNEL_DEBUG_LL_UART_NONE
 414         help
 415           ARM low level debugging.
 416
 417 config KERNEL_DEBUG_VIRTUAL
 418         bool "Compile the kernel with VM translations debugging"
 419         select KERNEL_DEBUG_KERNEL
 420         help
 421           Enable checks sanity checks to catch invalid uses of
 422           virt_to_phys()/phys_to_virt() against the non-linear address space.
 423
 424 config KERNEL_DYNAMIC_DEBUG
 425         bool "Compile the kernel with dynamic printk"
 426         select KERNEL_DEBUG_FS
 427         help
 428           Compiles debug level messages into the kernel, which would not
 429           otherwise be available at runtime. These messages can then be
 430           enabled/disabled based on various levels of scope - per source file,
 431           function, module, format string, and line number. This mechanism
 432           implicitly compiles in all pr_debug() and dev_dbg() calls, which
 433           enlarges the kernel text size by about 2%.
 434
 435 config KERNEL_EARLY_PRINTK
 436         bool "Compile the kernel with early printk"
 437         default y if TARGET_bcm53xx
 438         depends on arm
 439         select KERNEL_DEBUG_KERNEL
 440         select KERNEL_DEBUG_LL if arm
 441         help
 442           Compile the kernel with early printk support.  This is only useful for
 443           debugging purposes to send messages over the serial console in early boot.
 444           Enable this to debug early boot problems.
 445
 446 config KERNEL_KPROBES
 447         bool "Compile the kernel with kprobes support"
 448         select KERNEL_FTRACE
 449         select KERNEL_PERF_EVENTS
 450         help
 451           Compiles the kernel with KPROBES support, which allows you to trap
 452           at almost any kernel address and execute a callback function.
 453           register_kprobe() establishes a probepoint and specifies the
 454           callback. Kprobes is useful for kernel debugging, non-intrusive
 455           instrumentation and testing.
 456           If in doubt, say "N".
 457
 458 config KERNEL_KPROBE_EVENTS
 459         bool
 460         default y if KERNEL_KPROBES
 461
 462 config KERNEL_BPF_EVENTS
 463         bool "Compile the kernel with BPF event support"
 464         select KERNEL_KPROBES
 465         help
 466           Allows to attach BPF programs to kprobe, uprobe and tracepoint events.
 467           This is required to use BPF maps of type BPF_MAP_TYPE_PERF_EVENT_ARRAY
 468           for sending data from BPF programs to user-space for post-processing
 469           or logging.
 470
 471 config KERNEL_BPF_KPROBE_OVERRIDE
 472         bool
 473         depends on KERNEL_KPROBES
 474         default n
 475
 476 config KERNEL_AIO
 477         bool "Compile the kernel with asynchronous IO support"
 478         default y if !SMALL_FLASH
 479
 480 config KERNEL_IO_URING
 481         bool "Compile the kernel with io_uring support"
 482         depends on !SMALL_FLASH
 483         default y if (x86_64 || aarch64)
 484
 485 config KERNEL_FHANDLE
 486         bool "Compile the kernel with support for fhandle syscalls"
 487         default y if !SMALL_FLASH
 488
 489 config KERNEL_FANOTIFY
 490         bool "Compile the kernel with modern file notification support"
 491         default y if !SMALL_FLASH
 492
 493 config KERNEL_BLK_DEV_BSG
 494         bool "Compile the kernel with SCSI generic v4 support for any block device"
 495
 496 config KERNEL_TRANSPARENT_HUGEPAGE
 497         bool
 498
 499 choice
 500         prompt "Transparent Hugepage Support sysfs defaults"
 501         depends on KERNEL_TRANSPARENT_HUGEPAGE
 502         default KERNEL_TRANSPARENT_HUGEPAGE_ALWAYS
 503
 504         config KERNEL_TRANSPARENT_HUGEPAGE_ALWAYS
 505                 bool "always"
 506
 507         config KERNEL_TRANSPARENT_HUGEPAGE_MADVISE
 508                 bool "madvise"
 509 endchoice
 510
 511 config KERNEL_HUGETLBFS
 512         bool
 513
 514 config KERNEL_HUGETLB_PAGE
 515         bool "Compile the kernel with HugeTLB support"
 516         select KERNEL_TRANSPARENT_HUGEPAGE
 517         select KERNEL_HUGETLBFS
 518
 519 config KERNEL_MAGIC_SYSRQ
 520         bool "Compile the kernel with SysRq support"
 521         default y
 522
 523 config KERNEL_DEBUG_PINCTRL
 524         bool "Compile the kernel with pinctrl debugging"
 525         select KERNEL_DEBUG_KERNEL
 526
 527 config KERNEL_DEBUG_GPIO
 528         bool "Compile the kernel with gpio debugging"
 529         select KERNEL_DEBUG_KERNEL
 530
 531 config KERNEL_COREDUMP
 532         bool
 533
 534 config KERNEL_ELF_CORE
 535         bool "Enable process core dump support"
 536         select KERNEL_COREDUMP
 537         default y if !SMALL_FLASH
 538
 539 config KERNEL_PROVE_LOCKING
 540         bool "Enable kernel lock checking"
 541         select KERNEL_DEBUG_KERNEL
 542
 543 config KERNEL_SOFTLOCKUP_DETECTOR
 544         bool "Compile the kernel with detect Soft Lockups"
 545         depends on KERNEL_DEBUG_KERNEL
 546         help
 547           Say Y here to enable the kernel to act as a watchdog to detect
 548           soft lockups.
 549
 550           Softlockups are bugs that cause the kernel to loop in kernel
 551           mode for more than 20 seconds, without giving other tasks a
 552           chance to run.  The current stack trace is displayed upon
 553           detection and the system will stay locked up.
 554
 555 config KERNEL_HARDLOCKUP_DETECTOR
 556         bool "Compile the kernel with detect Hard Lockups"
 557         depends on KERNEL_DEBUG_KERNEL
 558         help
 559           Say Y here to enable the kernel to act as a watchdog to detect
 560           hard lockups.
 561
 562           Hardlockups are bugs that cause the CPU to loop in kernel mode
 563           for more than 10 seconds, without letting other interrupts have a
 564           chance to run.  The current stack trace is displayed upon detection
 565           and the system will stay locked up.
 566
 567 config KERNEL_DETECT_HUNG_TASK
 568         bool "Compile the kernel with detect Hung Tasks"
 569         depends on KERNEL_DEBUG_KERNEL
 570         default KERNEL_SOFTLOCKUP_DETECTOR
 571         help
 572           Say Y here to enable the kernel to detect "hung tasks",
 573           which are bugs that cause the task to be stuck in
 574           uninterruptible "D" state indefinitely.
 575
 576           When a hung task is detected, the kernel will print the
 577           current stack trace (which you should report), but the
 578           task will stay in uninterruptible state. If lockdep is
 579           enabled then all held locks will also be reported. This
 580           feature has negligible overhead.
 581
 582 config KERNEL_WQ_WATCHDOG
 583         bool "Compile the kernel with detect Workqueue Stalls"
 584         depends on KERNEL_DEBUG_KERNEL
 585         help
 586           Say Y here to enable stall detection on workqueues.  If a
 587           worker pool doesn't make forward progress on a pending work
 588           item for over a given amount of time, 30s by default, a
 589           warning message is printed along with dump of workqueue
 590           state.  This can be configured through kernel parameter
 591           "workqueue.watchdog_thresh" and its sysfs counterpart.
 592
 593 config KERNEL_DEBUG_ATOMIC_SLEEP
 594         bool "Compile the kernel with sleep inside atomic section checking"
 595         depends on KERNEL_DEBUG_KERNEL
 596         help
 597           If you say Y here, various routines which may sleep will become very
 598           noisy if they are called inside atomic sections: when a spinlock is
 599           held, inside an rcu read side critical section, inside preempt disabled
 600           sections, inside an interrupt, etc...
 601
 602 config KERNEL_DEBUG_VM
 603         bool "Compile the kernel with debug VM"
 604         depends on KERNEL_DEBUG_KERNEL
 605         help
 606           Enable this to turn on extended checks in the virtual-memory system
 607           that may impact performance.
 608
 609           If unsure, say N.
 610
 611 config KERNEL_PRINTK_TIME
 612         bool "Enable printk timestamps"
 613         default y
 614
 615 config KERNEL_SLUB_DEBUG
 616         bool
 617
 618 config KERNEL_SLUB_DEBUG_ON
 619         bool
 620
 621 config KERNEL_SLABINFO
 622         select KERNEL_SLUB_DEBUG
 623         select KERNEL_SLUB_DEBUG_ON
 624         bool "Enable /proc slab debug info"
 625
 626 config KERNEL_PROC_PAGE_MONITOR
 627         bool "Enable /proc page monitoring"
 628
 629 config KERNEL_RELAY
 630         bool
 631
 632 config KERNEL_KEXEC
 633         bool "Enable kexec support"
 634
 635 config KERNEL_PROC_VMCORE
 636         bool
 637
 638 config KERNEL_PROC_KCORE
 639         bool
 640
 641 config KERNEL_CRASH_DUMP
 642         depends on i386 || x86_64 || arm || armeb
 643         select KERNEL_KEXEC
 644         select KERNEL_PROC_VMCORE
 645         select KERNEL_PROC_KCORE
 646         bool "Enable support for kexec crashdump"
 647         default y
 648
 649 config USE_RFKILL
 650         bool "Enable rfkill support"
 651         default RFKILL_SUPPORT
 652
 653 config USE_SPARSE
 654         bool "Enable sparse check during kernel build"
 655
 656 config KERNEL_DEVTMPFS
 657         bool "Compile the kernel with device tmpfs enabled"
 658         help
 659           devtmpfs is a simple, kernel-managed /dev filesystem. The kernel creates
 660           devices nodes for all registered devices to simplify boot, but leaves more
 661           complex tasks to userspace (e.g. udev).
 662
 663 if KERNEL_DEVTMPFS
 664
 665         config KERNEL_DEVTMPFS_MOUNT
 666                 bool "Automatically mount devtmpfs after root filesystem is mounted"
 667
 668 endif
 669
 670 config KERNEL_KEYS
 671         bool "Enable kernel access key retention support"
 672         default !SMALL_FLASH
 673
 674 config KERNEL_PERSISTENT_KEYRINGS
 675         bool "Enable kernel persistent keyrings"
 676         depends on KERNEL_KEYS
 677
 678 config KERNEL_KEYS_REQUEST_CACHE
 679         bool "Enable temporary caching of the last request_key() result"
 680         depends on KERNEL_KEYS
 681
 682 config KERNEL_BIG_KEYS
 683         bool "Enable large payload keys on kernel keyrings"
 684         depends on KERNEL_KEYS
 685
 686 #
 687 # CGROUP support symbols
 688 #
 689
 690 config KERNEL_CGROUPS
 691         bool "Enable kernel cgroups"
 692         default y if !SMALL_FLASH
 693
 694 if KERNEL_CGROUPS
 695
 696         config KERNEL_CGROUP_DEBUG
 697                 bool "Example debug cgroup subsystem"
 698                 help
 699                   This option enables a simple cgroup subsystem that
 700                   exports useful debugging information about the cgroups
 701                   framework.
 702
 703         config KERNEL_FREEZER
 704                 bool
 705
 706         config KERNEL_CGROUP_FREEZER
 707                 bool "legacy Freezer cgroup subsystem"
 708                 select KERNEL_FREEZER
 709                 help
 710                   Provides a way to freeze and unfreeze all tasks in a
 711                   cgroup.
 712                   (legacy cgroup1-only controller, in cgroup2 freezer
 713                   is integrated in the Memory controller)
 714
 715         config KERNEL_CGROUP_DEVICE
 716                 bool "legacy Device controller for cgroups"
 717                 help
 718                   Provides a cgroup implementing whitelists for devices which
 719                   a process in the cgroup can mknod or open.
 720                   (legacy cgroup1-only controller)
 721
 722         config KERNEL_CGROUP_HUGETLB
 723                 bool "HugeTLB controller"
 724                 select KERNEL_HUGETLB_PAGE
 725
 726         config KERNEL_CGROUP_PIDS
 727                 bool "PIDs cgroup subsystem"
 728                 default y
 729                 help
 730                   Provides enforcement of process number limits in the scope of a
 731                   cgroup.
 732
 733         config KERNEL_CGROUP_RDMA
 734                 bool "RDMA controller for cgroups"
 735                 default y
 736
 737         config KERNEL_CGROUP_BPF
 738                 bool "Support for eBPF programs attached to cgroups"
 739                 default y
 740
 741         config KERNEL_CPUSETS
 742                 bool "Cpuset support"
 743                 default y
 744                 help
 745                   This option will let you create and manage CPUSETs which
 746                   allow dynamically partitioning a system into sets of CPUs and
 747                   Memory Nodes and assigning tasks to run only within those sets.
 748                   This is primarily useful on large SMP or NUMA systems.
 749
 750         config KERNEL_PROC_PID_CPUSET
 751                 bool "Include legacy /proc/<pid>/cpuset file"
 752                 depends on KERNEL_CPUSETS
 753
 754         config KERNEL_CGROUP_CPUACCT
 755                 bool "Simple CPU accounting cgroup subsystem"
 756                 default y
 757                 help
 758                   Provides a simple Resource Controller for monitoring the
 759                   total CPU consumed by the tasks in a cgroup.
 760
 761         config KERNEL_RESOURCE_COUNTERS
 762                 bool "Resource counters"
 763                 default y
 764                 help
 765                   This option enables controller independent resource accounting
 766                   infrastructure that works with cgroups.
 767
 768         config KERNEL_MM_OWNER
 769                 bool
 770                 default y if KERNEL_MEMCG
 771
 772         config KERNEL_MEMCG
 773                 bool "Memory Resource Controller for Control Groups"
 774                 default y
 775                 select KERNEL_FREEZER
 776                 depends on KERNEL_RESOURCE_COUNTERS
 777                 help
 778                   Provides a memory resource controller that manages both anonymous
 779                   memory and page cache. (See Documentation/cgroups/memory.txt)
 780
 781                   Note that setting this option increases fixed memory overhead
 782                   associated with each page of memory in the system. By this,
 783                   20(40)bytes/PAGE_SIZE on 32(64)bit system will be occupied by memory
 784                   usage tracking struct at boot. Total amount of this is printed out
 785                   at boot.
 786
 787                   Only enable when you're ok with these tradeoffs and really
 788                   sure you need the memory resource controller. Even when you enable
 789                   this, you can set "cgroup_disable=memory" at your boot option to
 790                   disable memory resource controller and you can avoid overheads
 791                   (but lose benefits of memory resource controller).
 792
 793                   This config option also selects MM_OWNER config option, which
 794                   could in turn add some fork/exit overhead.
 795
 796         config KERNEL_MEMCG_SWAP
 797                 bool "Memory Resource Controller Swap Extension"
 798                 default y
 799                 depends on KERNEL_MEMCG
 800                 help
 801                   Add swap management feature to memory resource controller. When you
 802                   enable this, you can limit mem+swap usage per cgroup. In other words,
 803                   when you disable this, memory resource controller has no cares to
 804                   usage of swap...a process can exhaust all of the swap. This extension
 805                   is useful when you want to avoid exhaustion swap but this itself
 806                   adds more overheads and consumes memory for remembering information.
 807                   Especially if you use 32bit system or small memory system, please
 808                   be careful about enabling this. When memory resource controller
 809                   is disabled by boot option, this will be automatically disabled and
 810                   there will be no overhead from this. Even when you set this config=y,
 811                   if boot option "swapaccount=0" is set, swap will not be accounted.
 812                   Now, memory usage of swap_cgroup is 2 bytes per entry. If swap page
 813                   size is 4096bytes, 512k per 1Gbytes of swap.
 814
 815         config KERNEL_MEMCG_SWAP_ENABLED
 816                 bool "Memory Resource Controller Swap Extension enabled by default"
 817                 depends on KERNEL_MEMCG_SWAP
 818                 help
 819                   Memory Resource Controller Swap Extension comes with its price in
 820                   a bigger memory consumption. General purpose distribution kernels
 821                   which want to enable the feature but keep it disabled by default
 822                   and let the user enable it by swapaccount boot command line
 823                   parameter should have this option unselected.
 824
 825                   Those who want to have the feature enabled by default should
 826                   select this option (if, for some reason, they need to disable it,
 827                   then swapaccount=0 does the trick).
 828
 829
 830         config KERNEL_MEMCG_KMEM
 831                 bool "Memory Resource Controller Kernel Memory accounting (EXPERIMENTAL)"
 832                 default y
 833                 depends on KERNEL_MEMCG
 834                 help
 835                   The Kernel Memory extension for Memory Resource Controller can limit
 836                   the amount of memory used by kernel objects in the system. Those are
 837                   fundamentally different from the entities handled by the standard
 838                   Memory Controller, which are page-based, and can be swapped. Users of
 839                   the kmem extension can use it to guarantee that no group of processes
 840                   will ever exhaust kernel resources alone.
 841
 842         config KERNEL_CGROUP_PERF
 843                 bool "Enable perf_event per-cpu per-container group (cgroup) monitoring"
 844                 select KERNEL_PERF_EVENTS
 845                 help
 846                   This option extends the per-cpu mode to restrict monitoring to
 847                   threads which belong to the cgroup specified and run on the
 848                   designated cpu.
 849
 850         menuconfig KERNEL_CGROUP_SCHED
 851                 bool "Group CPU scheduler"
 852                 default y
 853                 help
 854                   This feature lets CPU scheduler recognize task groups and control CPU
 855                   bandwidth allocation to such task groups. It uses cgroups to group
 856                   tasks.
 857
 858         if KERNEL_CGROUP_SCHED
 859
 860                 config KERNEL_FAIR_GROUP_SCHED
 861                         bool "Group scheduling for SCHED_OTHER"
 862                         default y
 863
 864                 config KERNEL_CFS_BANDWIDTH
 865                         bool "CPU bandwidth provisioning for FAIR_GROUP_SCHED"
 866                         default y
 867                         depends on KERNEL_FAIR_GROUP_SCHED
 868                         help
 869                           This option allows users to define CPU bandwidth rates (limits) for
 870                           tasks running within the fair group scheduler.  Groups with no limit
 871                           set are considered to be unconstrained and will run with no
 872                           restriction.
 873                           See tip/Documentation/scheduler/sched-bwc.txt for more information.
 874
 875                 config KERNEL_RT_GROUP_SCHED
 876                         bool "Group scheduling for SCHED_RR/FIFO"
 877                         default y
 878                         help
 879                           This feature lets you explicitly allocate real CPU bandwidth
 880                           to task groups. If enabled, it will also make it impossible to
 881                           schedule realtime tasks for non-root users until you allocate
 882                           realtime bandwidth for them.
 883
 884         endif
 885
 886         config KERNEL_BLK_CGROUP
 887                 bool "Block IO controller"
 888                 default y
 889                 help
 890                   Generic block IO controller cgroup interface. This is the common
 891                   cgroup interface which should be used by various IO controlling
 892                   policies.
 893
 894                   Currently, CFQ IO scheduler uses it to recognize task groups and
 895                   control disk bandwidth allocation (proportional time slice allocation)
 896                   to such task groups. It is also used by bio throttling logic in
 897                   block layer to implement upper limit in IO rates on a device.
 898
 899                   This option only enables generic Block IO controller infrastructure.
 900                   One needs to also enable actual IO controlling logic/policy. For
 901                   enabling proportional weight division of disk bandwidth in CFQ, set
 902                   CONFIG_CFQ_GROUP_IOSCHED=y; for enabling throttling policy, set
 903                   CONFIG_BLK_DEV_THROTTLING=y.
 904
 905         if KERNEL_BLK_CGROUP
 906
 907                 config KERNEL_CFQ_GROUP_IOSCHED
 908                         bool "Proportional weight of disk bandwidth in CFQ"
 909
 910                 config KERNEL_BLK_DEV_THROTTLING
 911                         bool "Enable throttling policy"
 912                         default y
 913
 914                 config KERNEL_BLK_DEV_THROTTLING_LOW
 915                         bool "Block throttling .low limit interface support (EXPERIMENTAL)"
 916                         depends on KERNEL_BLK_DEV_THROTTLING
 917         endif
 918
 919         config KERNEL_DEBUG_BLK_CGROUP
 920                 bool "Enable Block IO controller debugging"
 921                 depends on KERNEL_BLK_CGROUP
 922                 help
 923                   Enable some debugging help. Currently it exports additional stat
 924                   files in a cgroup which can be useful for debugging.
 925
 926         config KERNEL_NET_CLS_CGROUP
 927                 bool "legacy Control Group Classifier"
 928
 929         config KERNEL_CGROUP_NET_CLASSID
 930                 bool "legacy Network classid cgroup"
 931
 932         config KERNEL_CGROUP_NET_PRIO
 933                 bool "legacy Network priority cgroup"
 934
 935 endif
 936
 937 #
 938 # Namespace support symbols
 939 #
 940
 941 config KERNEL_NAMESPACES
 942         bool "Enable kernel namespaces"
 943         default y if !SMALL_FLASH
 944
 945 if KERNEL_NAMESPACES
 946
 947         config KERNEL_UTS_NS
 948                 bool "UTS namespace"
 949                 default y
 950                 help
 951                   In this namespace, tasks see different info provided
 952                   with the uname() system call.
 953
 954         config KERNEL_IPC_NS
 955                 bool "IPC namespace"
 956                 default y
 957                 help
 958                   In this namespace, tasks work with IPC ids which correspond to
 959                   different IPC objects in different namespaces.
 960
 961         config KERNEL_USER_NS
 962                 bool "User namespace (EXPERIMENTAL)"
 963                 default y
 964                 help
 965                   This allows containers, i.e. vservers, to use user namespaces
 966                   to provide different user info for different servers.
 967
 968         config KERNEL_PID_NS
 969                 bool "PID Namespaces"
 970                 default y
 971                 help
 972                   Support process id namespaces. This allows having multiple
 973                   processes with the same pid as long as they are in different
 974                   pid namespaces. This is a building block of containers.
 975
 976         config KERNEL_NET_NS
 977                 bool "Network namespace"
 978                 default y
 979                 help
 980                   Allow user space to create what appear to be multiple instances
 981                   of the network stack.
 982
 983 endif
 984
 985 config KERNEL_DEVPTS_MULTIPLE_INSTANCES
 986         bool "Support multiple instances of devpts"
 987         default y if !SMALL_FLASH
 988         help
 989           Enable support for multiple instances of devpts filesystem.
 990           If you want to have isolated PTY namespaces (eg: in containers),
 991           say Y here. Otherwise, say N. If enabled, each mount of devpts
 992           filesystem with the '-o newinstance' option will create an
 993           independent PTY namespace.
 994
 995 config KERNEL_POSIX_MQUEUE
 996         bool "POSIX Message Queues"
 997         default y if !SMALL_FLASH
 998         help
 999           POSIX variant of message queues is a part of IPC. In POSIX message
1000           queues every message has a priority which decides about succession
1001           of receiving it by a process. If you want to compile and run
1002           programs written e.g. for Solaris with use of its POSIX message
1003           queues (functions mq_*) say Y here.
1004
1005           POSIX message queues are visible as a filesystem called 'mqueue'
1006           and can be mounted somewhere if you want to do filesystem
1007           operations on message queues.
1008
1009
1010 config KERNEL_SECCOMP_FILTER
1011         bool
1012         default y if !SMALL_FLASH
1013
1014 config KERNEL_SECCOMP
1015         bool "Enable seccomp support"
1016                 depends on !(TARGET_uml)
1017                 select KERNEL_SECCOMP_FILTER
1018                 default y if !SMALL_FLASH
1019                 help
1020                   Build kernel with support for seccomp.
1021
1022 #
1023 # IPv4 configuration
1024 #
1025
1026 config KERNEL_IP_MROUTE
1027         bool "Enable IPv4 multicast routing"
1028         default y
1029         help
1030           Multicast routing requires a multicast routing daemon in
1031           addition to kernel support.
1032
1033 if KERNEL_IP_MROUTE
1034
1035         config KERNEL_IP_MROUTE_MULTIPLE_TABLES
1036                 def_bool y
1037
1038         config KERNEL_IP_PIMSM_V1
1039                 def_bool y
1040
1041         config KERNEL_IP_PIMSM_V2
1042                 def_bool y
1043
1044 endif
1045
1046 #
1047 # IPv6 configuration
1048 #
1049
1050 config KERNEL_IPV6
1051         def_bool IPV6
1052
1053 if KERNEL_IPV6
1054
1055         config KERNEL_IPV6_MULTIPLE_TABLES
1056                 def_bool y
1057
1058         config KERNEL_IPV6_SUBTREES
1059                 def_bool y
1060
1061         config KERNEL_IPV6_MROUTE
1062                 bool "Enable IPv6 multicast routing"
1063                 default y
1064                 help
1065                   Multicast routing requires a multicast routing daemon in
1066                   addition to kernel support.
1067
1068         if KERNEL_IPV6_MROUTE
1069
1070                 config KERNEL_IPV6_MROUTE_MULTIPLE_TABLES
1071                         def_bool y
1072
1073                 config KERNEL_IPV6_PIMSM_V2
1074                         def_bool y
1075
1076         endif
1077
1078         config KERNEL_IPV6_SEG6_LWTUNNEL
1079                 bool "Enable support for lightweight tunnels"
1080                 default y if !SMALL_FLASH
1081                 help
1082                   Using lwtunnel (needed for IPv6 segment routing) requires ip-full package.
1083
1084         config KERNEL_LWTUNNEL_BPF
1085                 def_bool n
1086
1087 endif
1088
1089 #
1090 # Miscellaneous network configuration
1091 #
1092
1093 config KERNEL_NET_L3_MASTER_DEV
1094         bool "L3 Master device support"
1095         help
1096           This module provides glue between core networking code and device
1097           drivers to support L3 master devices like VRF.
1098
1099 config KERNEL_WIRELESS_EXT
1100         def_bool n
1101
1102 config KERNEL_WEXT_CORE
1103         def_bool KERNEL_WIRELESS_EXT
1104
1105 config KERNEL_WEXT_PRIV
1106         def_bool KERNEL_WIRELESS_EXT
1107
1108 config KERNEL_WEXT_PROC
1109         def_bool KERNEL_WIRELESS_EXT
1110
1111 config KERNEL_WEXT_SPY
1112         def_bool KERNEL_WIRELESS_EXT
1113
1114 config KERNEL_PAGE_POOL
1115         def_bool n
1116
1117 config KERNEL_PAGE_POOL_STATS
1118         bool "Page pool stats support"
1119         depends on KERNEL_PAGE_POOL
1120
1121 #
1122 # NFS related symbols
1123 #
1124 config KERNEL_IP_PNP
1125         bool "Compile the kernel with rootfs on NFS"
1126         help
1127            If you want to make your kernel boot off a NFS server as root
1128            filesystem, select Y here.
1129
1130 if KERNEL_IP_PNP
1131
1132         config KERNEL_IP_PNP_DHCP
1133                 def_bool y
1134
1135         config KERNEL_IP_PNP_BOOTP
1136                 def_bool n
1137
1138         config KERNEL_IP_PNP_RARP
1139                 def_bool n
1140
1141         config KERNEL_NFS_FS
1142                 def_bool y
1143
1144         config KERNEL_NFS_V2
1145                 def_bool y
1146
1147         config KERNEL_NFS_V3
1148                 def_bool y
1149
1150         config KERNEL_ROOT_NFS
1151                 def_bool y
1152
1153 endif
1154
1155 menu "Filesystem ACL and attr support options"
1156         config USE_FS_ACL_ATTR
1157                 bool "Use filesystem ACL and attr support by default"
1158                 help
1159                   Make using ACLs (e.g. POSIX ACL, NFSv4 ACL) the default
1160                   for kernel and packages, except tmpfs, flash filesystems,
1161                   and old NFS.  Also enable userspace extended attribute support
1162                   by default.  (OpenWrt already has an expection it will be
1163                   present in the kernel).
1164
1165         config KERNEL_FS_POSIX_ACL
1166                 bool "Enable POSIX ACL support"
1167                 default y if USE_FS_ACL_ATTR
1168
1169         config KERNEL_BTRFS_FS_POSIX_ACL
1170                 bool "Enable POSIX ACL for BtrFS Filesystems"
1171                 select KERNEL_FS_POSIX_ACL
1172                 default y if USE_FS_ACL_ATTR
1173
1174         config KERNEL_EXT4_FS_POSIX_ACL
1175                 bool "Enable POSIX ACL for Ext4 Filesystems"
1176                 select KERNEL_FS_POSIX_ACL
1177                 default y if USE_FS_ACL_ATTR
1178
1179         config KERNEL_F2FS_FS_POSIX_ACL
1180                 bool "Enable POSIX ACL for F2FS Filesystems"
1181                 select KERNEL_FS_POSIX_ACL
1182
1183         config KERNEL_JFFS2_FS_POSIX_ACL
1184                 bool "Enable POSIX ACL for JFFS2 Filesystems"
1185                 select KERNEL_FS_POSIX_ACL
1186
1187         config KERNEL_TMPFS_POSIX_ACL
1188                 bool "Enable POSIX ACL for TMPFS Filesystems"
1189                 select KERNEL_FS_POSIX_ACL
1190
1191         config KERNEL_CIFS_ACL
1192                 bool "Enable CIFS ACLs"
1193                 select KERNEL_FS_POSIX_ACL
1194                 default y if USE_FS_ACL_ATTR
1195
1196         config KERNEL_HFS_FS_POSIX_ACL
1197                 bool "Enable POSIX ACL for HFS Filesystems"
1198                 select KERNEL_FS_POSIX_ACL
1199                 default y if USE_FS_ACL_ATTR
1200
1201         config KERNEL_HFSPLUS_FS_POSIX_ACL
1202                 bool "Enable POSIX ACL for HFS+ Filesystems"
1203                 select KERNEL_FS_POSIX_ACL
1204                 default y if USE_FS_ACL_ATTR
1205
1206         config KERNEL_NFS_ACL_SUPPORT
1207                 bool "Enable ACLs for NFS"
1208                 default y if USE_FS_ACL_ATTR
1209
1210         config KERNEL_NFS_V3_ACL_SUPPORT
1211                 bool "Enable ACLs for NFSv3"
1212
1213         config KERNEL_NFSD_V2_ACL_SUPPORT
1214                 bool "Enable ACLs for NFSDv2"
1215
1216         config KERNEL_NFSD_V3_ACL_SUPPORT
1217                 bool "Enable ACLs for NFSDv3"
1218
1219         config KERNEL_REISER_FS_POSIX_ACL
1220                 bool "Enable POSIX ACLs for ReiserFS"
1221                 select KERNEL_FS_POSIX_ACL
1222                 default y if USE_FS_ACL_ATTR
1223
1224         config KERNEL_XFS_POSIX_ACL
1225                 bool "Enable POSIX ACLs for XFS"
1226                 select KERNEL_FS_POSIX_ACL
1227                 default y if USE_FS_ACL_ATTR
1228
1229         config KERNEL_JFS_POSIX_ACL
1230                 bool "Enable POSIX ACLs for JFS"
1231                 select KERNEL_FS_POSIX_ACL
1232                 default y if USE_FS_ACL_ATTR
1233
1234 endmenu
1235
1236 config KERNEL_DEVMEM
1237         bool "/dev/mem virtual device support"
1238         help
1239           Say Y here if you want to support the /dev/mem device.
1240           The /dev/mem device is used to access areas of physical
1241           memory.
1242
1243 config KERNEL_DEVKMEM
1244         bool "/dev/kmem virtual device support"
1245         help
1246           Say Y here if you want to support the /dev/kmem device. The
1247           /dev/kmem device is rarely used, but can be used for certain
1248           kind of kernel debugging operations.
1249
1250 config KERNEL_SQUASHFS_FRAGMENT_CACHE_SIZE
1251         int "Number of squashfs fragments cached"
1252         default 2 if (SMALL_FLASH && !LOW_MEMORY_FOOTPRINT)
1253         default 3
1254
1255 config KERNEL_SQUASHFS_XATTR
1256         bool "Squashfs XATTR support"
1257
1258 #
1259 # compile optimization setting
1260 #
1261 choice
1262         prompt "Compiler optimization level"
1263         default KERNEL_CC_OPTIMIZE_FOR_SIZE if SMALL_FLASH
1264
1265 config KERNEL_CC_OPTIMIZE_FOR_PERFORMANCE
1266         bool "Optimize for performance"
1267         help
1268           This is the default optimization level for the kernel, building
1269           with the "-O2" compiler flag for best performance and most
1270           helpful compile-time warnings.
1271
1272 config KERNEL_CC_OPTIMIZE_FOR_SIZE
1273         bool "Optimize for size"
1274         help
1275           Enabling this option will pass "-Os" instead of "-O2" to
1276           your compiler resulting in a smaller kernel.
1277
1278 endchoice
1279
1280 config KERNEL_AUDIT
1281         bool "Auditing support"
1282
1283 config KERNEL_SECURITY
1284         bool "Enable different security models"
1285
1286 config KERNEL_SECURITY_NETWORK
1287         bool "Socket and Networking Security Hooks"
1288         select KERNEL_SECURITY
1289
1290 config KERNEL_SECURITY_SELINUX
1291         bool "NSA SELinux Support"
1292         select KERNEL_SECURITY_NETWORK
1293         select KERNEL_AUDIT
1294
1295 config KERNEL_SECURITY_SELINUX_BOOTPARAM
1296         bool "NSA SELinux boot parameter"
1297         depends on KERNEL_SECURITY_SELINUX
1298         default y
1299
1300 config KERNEL_SECURITY_SELINUX_DISABLE
1301         bool "NSA SELinux runtime disable"
1302         depends on KERNEL_SECURITY_SELINUX
1303
1304 config KERNEL_SECURITY_SELINUX_DEVELOP
1305         bool "NSA SELinux Development Support"
1306         depends on KERNEL_SECURITY_SELINUX
1307         default y
1308
1309 config KERNEL_SECURITY_SELINUX_SIDTAB_HASH_BITS
1310         int
1311         depends on KERNEL_SECURITY_SELINUX
1312         default 9
1313
1314 config KERNEL_SECURITY_SELINUX_SID2STR_CACHE_SIZE
1315         int
1316         depends on KERNEL_SECURITY_SELINUX
1317         default 256
1318
1319 config KERNEL_LSM
1320         string
1321         default "lockdown,yama,loadpin,safesetid,integrity,selinux"
1322         depends on KERNEL_SECURITY_SELINUX
1323
1324 config KERNEL_EXT4_FS_SECURITY
1325         bool "Ext4 Security Labels"
1326
1327 config KERNEL_F2FS_FS_SECURITY
1328         bool "F2FS Security Labels"
1329
1330 config KERNEL_UBIFS_FS_SECURITY
1331         bool "UBIFS Security Labels"
1332
1333 config KERNEL_JFFS2_FS_SECURITY
1334         bool "JFFS2 Security Labels"