config/Config-kernel.in

   1 # SPDX-License-Identifier: GPL-2.0-only
   2 #
   3 # Copyright (C) 2006-2014 OpenWrt.org
   4
   5 config KERNEL_BUILD_USER
   6         string "Custom Kernel Build User Name"
   7         default "builder" if BUILDBOT
   8         default ""
   9         help
  10           Sets the Kernel build user string, which for example will be returned
  11           by 'uname -a' on running systems.
  12           If not set, uses system user at build time.
  13
  14 config KERNEL_BUILD_DOMAIN
  15         string "Custom Kernel Build Domain Name"
  16         default "buildhost" if BUILDBOT
  17         default ""
  18         help
  19           Sets the Kernel build domain string, which for example will be
  20           returned by 'uname -a' on running systems.
  21           If not set, uses system hostname at build time.
  22
  23 config KERNEL_PRINTK
  24         bool "Enable support for printk"
  25         default y
  26
  27 config KERNEL_SWAP
  28         bool "Support for paging of anonymous memory (swap)"
  29         default y if !SMALL_FLASH
  30
  31 config KERNEL_PROC_STRIPPED
  32         bool "Strip non-essential /proc functionality to reduce code size"
  33         default y if SMALL_FLASH
  34
  35 config KERNEL_DEBUG_FS
  36         bool "Compile the kernel with debug filesystem enabled"
  37         default y
  38         help
  39           debugfs is a virtual file system that kernel developers use to put
  40           debugging files into. Enable this option to be able to read and
  41           write to these files. Many common debugging facilities, such as
  42           ftrace, require the existence of debugfs.
  43
  44 config KERNEL_MIPS_FP_SUPPORT
  45         bool
  46         default y if TARGET_pistachio
  47
  48 config KERNEL_ARM_PMU
  49         bool
  50         depends on (arm || aarch64)
  51
  52 config KERNEL_X86_VSYSCALL_EMULATION
  53         bool "Enable vsyscall emulation"
  54         depends on x86_64
  55         help
  56           This enables emulation of the legacy vsyscall page.  Disabling
  57           it is roughly equivalent to booting with vsyscall=none, except
  58           that it will also disable the helpful warning if a program
  59           tries to use a vsyscall.  With this option set to N, offending
  60           programs will just segfault, citing addresses of the form
  61           0xffffffffff600?00.
  62
  63           This option is required by many programs built before 2013, and
  64           care should be used even with newer programs if set to N.
  65
  66           Disabling this option saves about 7K of kernel size and
  67           possibly 4K of additional runtime pagetable memory.
  68
  69 config KERNEL_PERF_EVENTS
  70         bool "Compile the kernel with performance events and counters"
  71         select KERNEL_ARM_PMU if (arm || aarch64)
  72
  73 config KERNEL_PROFILING
  74         bool "Compile the kernel with profiling enabled"
  75         select KERNEL_PERF_EVENTS
  76         help
  77           Enable the extended profiling support mechanisms used by profilers such
  78           as OProfile.
  79
  80 config KERNEL_RPI_AXIPERF
  81         bool "Compile the kernel with RaspberryPi AXI Performance monitors"
  82         default y
  83         depends on KERNEL_PERF_EVENTS && TARGET_bcm27xx
  84
  85 config KERNEL_UBSAN
  86         bool "Compile the kernel with undefined behaviour sanity checker"
  87         help
  88           This option enables undefined behaviour sanity checker
  89           Compile-time instrumentation is used to detect various undefined
  90           behaviours in runtime. Various types of checks may be enabled
  91           via boot parameter ubsan_handle
  92           (see: Documentation/dev-tools/ubsan.rst).
  93
  94 config KERNEL_UBSAN_SANITIZE_ALL
  95         bool "Enable instrumentation for the entire kernel"
  96         depends on KERNEL_UBSAN
  97         default y
  98         help
  99           This option activates instrumentation for the entire kernel.
 100           If you don't enable this option, you have to explicitly specify
 101           UBSAN_SANITIZE := y for the files/directories you want to check for UB.
 102           Enabling this option will get kernel image size increased
 103           significantly.
 104
 105 config KERNEL_UBSAN_ALIGNMENT
 106         bool "Enable checking of pointers alignment"
 107         depends on KERNEL_UBSAN
 108         help
 109           This option enables detection of unaligned memory accesses.
 110           Enabling this option on architectures that support unaligned
 111           accesses may produce a lot of false positives.
 112
 113 config KERNEL_UBSAN_BOUNDS
 114         bool "Perform array index bounds checking"
 115         depends on KERNEL_UBSAN
 116         help
 117           This option enables detection of directly indexed out of bounds array
 118           accesses, where the array size is known at compile time. Note that
 119           this does not protect array overflows via bad calls to the
 120           {str,mem}*cpy() family of functions (that is addressed by
 121           FORTIFY_SOURCE).
 122
 123 config KERNEL_UBSAN_NULL
 124         bool "Enable checking of null pointers"
 125         depends on KERNEL_UBSAN
 126         help
 127           This option enables detection of memory accesses via a
 128           null pointer.
 129
 130 config KERNEL_UBSAN_TRAP
 131         bool "On Sanitizer warnings, abort the running kernel code"
 132         depends on KERNEL_UBSAN
 133         help
 134           Building kernels with Sanitizer features enabled tends to grow the
 135           kernel size by around 5%, due to adding all the debugging text on
 136           failure paths. To avoid this, Sanitizer instrumentation can just
 137           issue a trap. This reduces the kernel size overhead but turns all
 138           warnings (including potentially harmless conditions) into full
 139           exceptions that abort the running kernel code (regardless of context,
 140           locks held, etc), which may destabilize the system. For some system
 141           builders this is an acceptable trade-off.
 142
 143 config KERNEL_KASAN
 144         bool "Compile the kernel with KASan: runtime memory debugger"
 145         select KERNEL_SLUB_DEBUG
 146         depends on (x86_64 || aarch64)
 147         help
 148           Enables kernel address sanitizer - runtime memory debugger,
 149           designed to find out-of-bounds accesses and use-after-free bugs.
 150           This is strictly a debugging feature and it requires a gcc version
 151           of 4.9.2 or later. Detection of out of bounds accesses to stack or
 152           global variables requires gcc 5.0 or later.
 153           This feature consumes about 1/8 of available memory and brings about
 154           ~x3 performance slowdown.
 155           For better error detection enable CONFIG_STACKTRACE.
 156           Currently CONFIG_KASAN doesn't work with CONFIG_DEBUG_SLAB
 157           (the resulting kernel does not boot).
 158
 159 config KERNEL_KASAN_EXTRA
 160         bool "KAsan: extra checks"
 161         depends on KERNEL_KASAN && KERNEL_DEBUG_KERNEL
 162         help
 163           This enables further checks in the kernel address sanitizer, for now
 164           it only includes the address-use-after-scope check that can lead
 165           to excessive kernel stack usage, frame size warnings and longer
 166           compile time.
 167           https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81715 has more
 168
 169 config KERNEL_KASAN_VMALLOC
 170         bool "Back mappings in vmalloc space with real shadow memory"
 171         depends on KERNEL_KASAN
 172         help
 173           By default, the shadow region for vmalloc space is the read-only
 174           zero page. This means that KASAN cannot detect errors involving
 175           vmalloc space.
 176
 177           Enabling this option will hook in to vmap/vmalloc and back those
 178           mappings with real shadow memory allocated on demand. This allows
 179           for KASAN to detect more sorts of errors (and to support vmapped
 180           stacks), but at the cost of higher memory usage.
 181
 182           This option depends on HAVE_ARCH_KASAN_VMALLOC, but we can't
 183           depend on that in here, so it is possible that enabling this
 184           will have no effect.
 185
 186 if KERNEL_KASAN
 187         config KERNEL_KASAN_GENERIC
 188         def_bool y
 189
 190         config KERNEL_KASAN_SW_TAGS
 191         def_bool n
 192 endif
 193
 194 choice
 195         prompt "Instrumentation type"
 196         depends on KERNEL_KASAN
 197         default KERNEL_KASAN_OUTLINE
 198
 199 config KERNEL_KASAN_OUTLINE
 200         bool "Outline instrumentation"
 201         help
 202           Before every memory access compiler insert function call
 203           __asan_load*/__asan_store*. These functions performs check
 204           of shadow memory. This is slower than inline instrumentation,
 205           however it doesn't bloat size of kernel's .text section so
 206           much as inline does.
 207
 208 config KERNEL_KASAN_INLINE
 209         bool "Inline instrumentation"
 210         help
 211           Compiler directly inserts code checking shadow memory before
 212           memory accesses. This is faster than outline (in some workloads
 213           it gives about x2 boost over outline instrumentation), but
 214           make kernel's .text size much bigger.
 215           This requires a gcc version of 5.0 or later.
 216
 217 endchoice
 218
 219 config KERNEL_KCOV
 220         bool "Compile the kernel with code coverage for fuzzing"
 221         select KERNEL_DEBUG_FS
 222         help
 223           KCOV exposes kernel code coverage information in a form suitable
 224           for coverage-guided fuzzing (randomized testing).
 225
 226           If RANDOMIZE_BASE is enabled, PC values will not be stable across
 227           different machines and across reboots. If you need stable PC values,
 228           disable RANDOMIZE_BASE.
 229
 230           For more details, see Documentation/kcov.txt.
 231
 232 config KERNEL_KCOV_ENABLE_COMPARISONS
 233         bool "Enable comparison operands collection by KCOV"
 234         depends on KERNEL_KCOV
 235         help
 236           KCOV also exposes operands of every comparison in the instrumented
 237           code along with operand sizes and PCs of the comparison instructions.
 238           These operands can be used by fuzzing engines to improve the quality
 239           of fuzzing coverage.
 240
 241 config KERNEL_KCOV_INSTRUMENT_ALL
 242         bool "Instrument all code by default"
 243         depends on KERNEL_KCOV
 244         default y if KERNEL_KCOV
 245         help
 246           If you are doing generic system call fuzzing (like e.g. syzkaller),
 247           then you will want to instrument the whole kernel and you should
 248           say y here. If you are doing more targeted fuzzing (like e.g.
 249           filesystem fuzzing with AFL) then you will want to enable coverage
 250           for more specific subsets of files, and should say n here.
 251
 252 config KERNEL_TASKSTATS
 253         bool "Compile the kernel with task resource/io statistics and accounting"
 254         help
 255           Enable the collection and publishing of task/io statistics and
 256           accounting.  Enable this option to enable i/o monitoring in system
 257           monitors.
 258
 259 if KERNEL_TASKSTATS
 260
 261         config KERNEL_TASK_DELAY_ACCT
 262                 def_bool y
 263
 264         config KERNEL_TASK_IO_ACCOUNTING
 265                 def_bool y
 266
 267         config KERNEL_TASK_XACCT
 268                 def_bool y
 269
 270 endif
 271
 272 config KERNEL_KALLSYMS
 273         bool "Compile the kernel with symbol table information"
 274         default y if !SMALL_FLASH
 275         help
 276           This will give you more information in stack traces from kernel oopses.
 277
 278 config KERNEL_FTRACE
 279         bool "Compile the kernel with tracing support"
 280         depends on !TARGET_uml
 281
 282 config KERNEL_FTRACE_SYSCALLS
 283         bool "Trace system calls"
 284         depends on KERNEL_FTRACE
 285
 286 config KERNEL_ENABLE_DEFAULT_TRACERS
 287         bool "Trace process context switches and events"
 288         depends on KERNEL_FTRACE
 289
 290 config KERNEL_FUNCTION_TRACER
 291         bool "Function tracer"
 292         depends on KERNEL_FTRACE
 293
 294 config KERNEL_FUNCTION_GRAPH_TRACER
 295         bool "Function graph tracer"
 296         depends on KERNEL_FUNCTION_TRACER
 297
 298 config KERNEL_DYNAMIC_FTRACE
 299         bool "Enable/disable function tracing dynamically"
 300         depends on KERNEL_FUNCTION_TRACER
 301
 302 config KERNEL_FUNCTION_PROFILER
 303         bool "Function profiler"
 304         depends on KERNEL_FUNCTION_TRACER
 305
 306 config KERNEL_IRQSOFF_TRACER
 307         bool "Interrupts-off Latency Tracer"
 308         depends on KERNEL_FTRACE
 309         help
 310           This option measures the time spent in irqs-off critical
 311           sections, with microsecond accuracy.
 312
 313           The default measurement method is a maximum search, which is
 314           disabled by default and can be runtime (re-)started
 315           via:
 316
 317               echo 0 > /sys/kernel/debug/tracing/tracing_max_latency
 318
 319           (Note that kernel size and overhead increase with this option
 320           enabled. This option and the preempt-off timing option can be
 321           used together or separately.)
 322
 323 config KERNEL_PREEMPT_TRACER
 324         bool "Preemption-off Latency Tracer"
 325         depends on KERNEL_FTRACE
 326         help
 327           This option measures the time spent in preemption-off critical
 328           sections, with microsecond accuracy.
 329
 330           The default measurement method is a maximum search, which is
 331           disabled by default and can be runtime (re-)started
 332           via:
 333
 334               echo 0 > /sys/kernel/debug/tracing/tracing_max_latency
 335
 336           (Note that kernel size and overhead increase with this option
 337           enabled. This option and the irqs-off timing option can be
 338           used together or separately.)
 339
 340 config KERNEL_HIST_TRIGGERS
 341         bool "Histogram triggers"
 342         depends on KERNEL_FTRACE
 343         help
 344           Hist triggers allow one or more arbitrary trace event fields to be
 345           aggregated into hash tables and dumped to stdout by reading a
 346           debugfs/tracefs file. They're useful for gathering quick and dirty
 347           (though precise) summaries of event activity as an initial guide for
 348           further investigation using more advanced tools.
 349
 350           Inter-event tracing of quantities such as latencies is also
 351           supported using hist triggers under this option.
 352
 353 config KERNEL_DEBUG_KERNEL
 354         bool
 355
 356 config KERNEL_DEBUG_INFO
 357         bool "Compile the kernel with debug information"
 358         default y if !SMALL_FLASH
 359         select KERNEL_DEBUG_KERNEL
 360         help
 361           This will compile your kernel and modules with debug information.
 362
 363 config KERNEL_DEBUG_INFO_BTF
 364
 365         bool "Enable additional BTF type information"
 366         depends on !HOST_OS_MACOS
 367         depends on KERNEL_DEBUG_INFO && !KERNEL_DEBUG_INFO_REDUCED
 368         select DWARVES
 369         help
 370           Generate BPF Type Format (BTF) information from DWARF debug info.
 371           Turning this on expects presence of pahole tool, which will convert
 372           DWARF type info into equivalent deduplicated BTF type info.
 373
 374           Required to run BPF CO-RE applications.
 375
 376 config KERNEL_DEBUG_INFO_REDUCED
 377         bool "Reduce debugging information"
 378         default y
 379         depends on KERNEL_DEBUG_INFO
 380         help
 381           If you say Y here gcc is instructed to generate less debugging
 382           information for structure types. This means that tools that
 383           need full debugging information (like kgdb or systemtap) won't
 384           be happy. But if you merely need debugging information to
 385           resolve line numbers there is no loss. Advantage is that
 386           build directory object sizes shrink dramatically over a full
 387           DEBUG_INFO build and compile times are reduced too.
 388           Only works with newer gcc versions.
 389
 390 config KERNEL_DEBUG_LL_UART_NONE
 391         bool
 392         depends on arm
 393
 394 config KERNEL_DEBUG_LL
 395         bool
 396         depends on arm
 397         select KERNEL_DEBUG_LL_UART_NONE
 398         help
 399           ARM low level debugging.
 400
 401 config KERNEL_DEBUG_VIRTUAL
 402         bool "Compile the kernel with VM translations debugging"
 403         select KERNEL_DEBUG_KERNEL
 404         help
 405           Enable checks sanity checks to catch invalid uses of
 406           virt_to_phys()/phys_to_virt() against the non-linear address space.
 407
 408 config KERNEL_DYNAMIC_DEBUG
 409         bool "Compile the kernel with dynamic printk"
 410         select KERNEL_DEBUG_FS
 411         help
 412           Compiles debug level messages into the kernel, which would not
 413           otherwise be available at runtime. These messages can then be
 414           enabled/disabled based on various levels of scope - per source file,
 415           function, module, format string, and line number. This mechanism
 416           implicitly compiles in all pr_debug() and dev_dbg() calls, which
 417           enlarges the kernel text size by about 2%.
 418
 419 config KERNEL_EARLY_PRINTK
 420         bool "Compile the kernel with early printk"
 421         default y if TARGET_bcm53xx
 422         depends on arm
 423         select KERNEL_DEBUG_KERNEL
 424         select KERNEL_DEBUG_LL if arm
 425         help
 426           Compile the kernel with early printk support.  This is only useful for
 427           debugging purposes to send messages over the serial console in early boot.
 428           Enable this to debug early boot problems.
 429
 430 config KERNEL_KPROBES
 431         bool "Compile the kernel with kprobes support"
 432         select KERNEL_FTRACE
 433         select KERNEL_PERF_EVENTS
 434         help
 435           Compiles the kernel with KPROBES support, which allows you to trap
 436           at almost any kernel address and execute a callback function.
 437           register_kprobe() establishes a probepoint and specifies the
 438           callback. Kprobes is useful for kernel debugging, non-intrusive
 439           instrumentation and testing.
 440           If in doubt, say "N".
 441
 442 config KERNEL_KPROBE_EVENTS
 443         bool
 444         default y if KERNEL_KPROBES
 445
 446 config KERNEL_BPF_EVENTS
 447         bool "Compile the kernel with BPF event support"
 448         select KERNEL_KPROBES
 449         help
 450           Allows to attach BPF programs to kprobe, uprobe and tracepoint events.
 451           This is required to use BPF maps of type BPF_MAP_TYPE_PERF_EVENT_ARRAY
 452           for sending data from BPF programs to user-space for post-processing
 453           or logging.
 454
 455 config KERNEL_BPF_KPROBE_OVERRIDE
 456         bool
 457         depends on KERNEL_KPROBES
 458
 459 config KERNEL_AIO
 460         bool "Compile the kernel with asynchronous IO support"
 461         default y if !SMALL_FLASH
 462
 463 config KERNEL_IO_URING
 464         bool "Compile the kernel with io_uring support"
 465         default y if !SMALL_FLASH
 466
 467 config KERNEL_FHANDLE
 468         bool "Compile the kernel with support for fhandle syscalls"
 469         default y if !SMALL_FLASH
 470
 471 config KERNEL_FANOTIFY
 472         bool "Compile the kernel with modern file notification support"
 473         default y if !SMALL_FLASH
 474
 475 config KERNEL_BLK_DEV_BSG
 476         bool "Compile the kernel with SCSI generic v4 support for any block device"
 477
 478 config KERNEL_TRANSPARENT_HUGEPAGE
 479         bool
 480
 481 choice
 482         prompt "Transparent Hugepage Support sysfs defaults"
 483         depends on KERNEL_TRANSPARENT_HUGEPAGE
 484         default KERNEL_TRANSPARENT_HUGEPAGE_ALWAYS
 485
 486         config KERNEL_TRANSPARENT_HUGEPAGE_ALWAYS
 487                 bool "always"
 488
 489         config KERNEL_TRANSPARENT_HUGEPAGE_MADVISE
 490                 bool "madvise"
 491 endchoice
 492
 493 config KERNEL_HUGETLBFS
 494         bool
 495
 496 config KERNEL_HUGETLB_PAGE
 497         bool "Compile the kernel with HugeTLB support"
 498         select KERNEL_TRANSPARENT_HUGEPAGE
 499         select KERNEL_HUGETLBFS
 500
 501 config KERNEL_MAGIC_SYSRQ
 502         bool "Compile the kernel with SysRq support"
 503         default y
 504
 505 config KERNEL_DEBUG_PINCTRL
 506         bool "Compile the kernel with pinctrl debugging"
 507         select KERNEL_DEBUG_KERNEL
 508
 509 config KERNEL_DEBUG_GPIO
 510         bool "Compile the kernel with gpio debugging"
 511         select KERNEL_DEBUG_KERNEL
 512
 513 config KERNEL_COREDUMP
 514         bool
 515
 516 config KERNEL_ELF_CORE
 517         bool "Enable process core dump support"
 518         select KERNEL_COREDUMP
 519         default y if !SMALL_FLASH
 520
 521 config KERNEL_PROVE_LOCKING
 522         bool "Enable kernel lock checking"
 523         select KERNEL_DEBUG_KERNEL
 524
 525 config KERNEL_SOFTLOCKUP_DETECTOR
 526         bool "Compile the kernel with detect Soft Lockups"
 527         depends on KERNEL_DEBUG_KERNEL
 528         help
 529           Say Y here to enable the kernel to act as a watchdog to detect
 530           soft lockups.
 531
 532           Softlockups are bugs that cause the kernel to loop in kernel
 533           mode for more than 20 seconds, without giving other tasks a
 534           chance to run.  The current stack trace is displayed upon
 535           detection and the system will stay locked up.
 536
 537 config KERNEL_DETECT_HUNG_TASK
 538         bool "Compile the kernel with detect Hung Tasks"
 539         depends on KERNEL_DEBUG_KERNEL
 540         default KERNEL_SOFTLOCKUP_DETECTOR
 541         help
 542           Say Y here to enable the kernel to detect "hung tasks",
 543           which are bugs that cause the task to be stuck in
 544           uninterruptible "D" state indefinitely.
 545
 546           When a hung task is detected, the kernel will print the
 547           current stack trace (which you should report), but the
 548           task will stay in uninterruptible state. If lockdep is
 549           enabled then all held locks will also be reported. This
 550           feature has negligible overhead.
 551
 552 config KERNEL_WQ_WATCHDOG
 553         bool "Compile the kernel with detect Workqueue Stalls"
 554         depends on KERNEL_DEBUG_KERNEL
 555         help
 556           Say Y here to enable stall detection on workqueues.  If a
 557           worker pool doesn't make forward progress on a pending work
 558           item for over a given amount of time, 30s by default, a
 559           warning message is printed along with dump of workqueue
 560           state.  This can be configured through kernel parameter
 561           "workqueue.watchdog_thresh" and its sysfs counterpart.
 562
 563 config KERNEL_DEBUG_ATOMIC_SLEEP
 564         bool "Compile the kernel with sleep inside atomic section checking"
 565         depends on KERNEL_DEBUG_KERNEL
 566         help
 567           If you say Y here, various routines which may sleep will become very
 568           noisy if they are called inside atomic sections: when a spinlock is
 569           held, inside an rcu read side critical section, inside preempt disabled
 570           sections, inside an interrupt, etc...
 571
 572 config KERNEL_DEBUG_VM
 573         bool "Compile the kernel with debug VM"
 574         depends on KERNEL_DEBUG_KERNEL
 575         help
 576           Enable this to turn on extended checks in the virtual-memory system
 577           that may impact performance.
 578
 579           If unsure, say N.
 580
 581 config KERNEL_PRINTK_TIME
 582         bool "Enable printk timestamps"
 583         default y
 584
 585 config KERNEL_SLUB_DEBUG
 586         bool
 587
 588 config KERNEL_SLUB_DEBUG_ON
 589         bool
 590
 591 config KERNEL_SLABINFO
 592         select KERNEL_SLUB_DEBUG
 593         select KERNEL_SLUB_DEBUG_ON
 594         bool "Enable /proc slab debug info"
 595
 596 config KERNEL_PROC_PAGE_MONITOR
 597         bool "Enable /proc page monitoring"
 598
 599 config KERNEL_RELAY
 600         bool
 601
 602 config KERNEL_KEXEC
 603         bool "Enable kexec support"
 604
 605 config KERNEL_PROC_VMCORE
 606         bool
 607
 608 config KERNEL_PROC_KCORE
 609         bool
 610
 611 config KERNEL_CRASH_DUMP
 612         depends on i386 || x86_64 || arm || armeb
 613         select KERNEL_KEXEC
 614         select KERNEL_PROC_VMCORE
 615         select KERNEL_PROC_KCORE
 616         bool "Enable support for kexec crashdump"
 617         default y
 618
 619 config USE_RFKILL
 620         bool "Enable rfkill support"
 621         default RFKILL_SUPPORT
 622
 623 config USE_SPARSE
 624         bool "Enable sparse check during kernel build"
 625
 626 config KERNEL_DEVTMPFS
 627         bool "Compile the kernel with device tmpfs enabled"
 628         help
 629           devtmpfs is a simple, kernel-managed /dev filesystem. The kernel creates
 630           devices nodes for all registered devices to simplify boot, but leaves more
 631           complex tasks to userspace (e.g. udev).
 632
 633 if KERNEL_DEVTMPFS
 634
 635         config KERNEL_DEVTMPFS_MOUNT
 636                 bool "Automatically mount devtmpfs after root filesystem is mounted"
 637
 638 endif
 639
 640 config KERNEL_KEYS
 641         bool "Enable kernel access key retention support"
 642         default !SMALL_FLASH
 643
 644 config KERNEL_PERSISTENT_KEYRINGS
 645         bool "Enable kernel persistent keyrings"
 646         depends on KERNEL_KEYS
 647
 648 config KERNEL_KEYS_REQUEST_CACHE
 649         bool "Enable temporary caching of the last request_key() result"
 650         depends on KERNEL_KEYS
 651
 652 config KERNEL_BIG_KEYS
 653         bool "Enable large payload keys on kernel keyrings"
 654         depends on KERNEL_KEYS
 655
 656 #
 657 # CGROUP support symbols
 658 #
 659
 660 config KERNEL_CGROUPS
 661         bool "Enable kernel cgroups"
 662         default y if !SMALL_FLASH
 663
 664 if KERNEL_CGROUPS
 665
 666         config KERNEL_CGROUP_DEBUG
 667                 bool "Example debug cgroup subsystem"
 668                 help
 669                   This option enables a simple cgroup subsystem that
 670                   exports useful debugging information about the cgroups
 671                   framework.
 672
 673         config KERNEL_FREEZER
 674                 bool
 675
 676         config KERNEL_CGROUP_FREEZER
 677                 bool "legacy Freezer cgroup subsystem"
 678                 select KERNEL_FREEZER
 679                 help
 680                   Provides a way to freeze and unfreeze all tasks in a
 681                   cgroup.
 682                   (legacy cgroup1-only controller, in cgroup2 freezer
 683                   is integrated in the Memory controller)
 684
 685         config KERNEL_CGROUP_DEVICE
 686                 bool "legacy Device controller for cgroups"
 687                 help
 688                   Provides a cgroup implementing whitelists for devices which
 689                   a process in the cgroup can mknod or open.
 690                   (legacy cgroup1-only controller)
 691
 692         config KERNEL_CGROUP_HUGETLB
 693                 bool "HugeTLB controller"
 694                 select KERNEL_HUGETLB_PAGE
 695
 696         config KERNEL_CGROUP_PIDS
 697                 bool "PIDs cgroup subsystem"
 698                 default y
 699                 help
 700                   Provides enforcement of process number limits in the scope of a
 701                   cgroup.
 702
 703         config KERNEL_CGROUP_RDMA
 704                 bool "RDMA controller for cgroups"
 705                 default y
 706
 707         config KERNEL_CGROUP_BPF
 708                 bool "Support for eBPF programs attached to cgroups"
 709                 default y
 710
 711         config KERNEL_CPUSETS
 712                 bool "Cpuset support"
 713                 default y
 714                 help
 715                   This option will let you create and manage CPUSETs which
 716                   allow dynamically partitioning a system into sets of CPUs and
 717                   Memory Nodes and assigning tasks to run only within those sets.
 718                   This is primarily useful on large SMP or NUMA systems.
 719
 720         config KERNEL_PROC_PID_CPUSET
 721                 bool "Include legacy /proc/<pid>/cpuset file"
 722                 depends on KERNEL_CPUSETS
 723
 724         config KERNEL_CGROUP_CPUACCT
 725                 bool "Simple CPU accounting cgroup subsystem"
 726                 default y
 727                 help
 728                   Provides a simple Resource Controller for monitoring the
 729                   total CPU consumed by the tasks in a cgroup.
 730
 731         config KERNEL_RESOURCE_COUNTERS
 732                 bool "Resource counters"
 733                 default y
 734                 help
 735                   This option enables controller independent resource accounting
 736                   infrastructure that works with cgroups.
 737
 738         config KERNEL_MM_OWNER
 739                 bool
 740                 default y if KERNEL_MEMCG
 741
 742         config KERNEL_MEMCG
 743                 bool "Memory Resource Controller for Control Groups"
 744                 default y
 745                 select KERNEL_FREEZER
 746                 depends on KERNEL_RESOURCE_COUNTERS
 747                 help
 748                   Provides a memory resource controller that manages both anonymous
 749                   memory and page cache. (See Documentation/cgroups/memory.txt)
 750
 751                   Note that setting this option increases fixed memory overhead
 752                   associated with each page of memory in the system. By this,
 753                   20(40)bytes/PAGE_SIZE on 32(64)bit system will be occupied by memory
 754                   usage tracking struct at boot. Total amount of this is printed out
 755                   at boot.
 756
 757                   Only enable when you're ok with these tradeoffs and really
 758                   sure you need the memory resource controller. Even when you enable
 759                   this, you can set "cgroup_disable=memory" at your boot option to
 760                   disable memory resource controller and you can avoid overheads
 761                   (but lose benefits of memory resource controller).
 762
 763                   This config option also selects MM_OWNER config option, which
 764                   could in turn add some fork/exit overhead.
 765
 766         config KERNEL_MEMCG_SWAP
 767                 bool "Memory Resource Controller Swap Extension"
 768                 default y
 769                 depends on KERNEL_MEMCG
 770                 help
 771                   Add swap management feature to memory resource controller. When you
 772                   enable this, you can limit mem+swap usage per cgroup. In other words,
 773                   when you disable this, memory resource controller has no cares to
 774                   usage of swap...a process can exhaust all of the swap. This extension
 775                   is useful when you want to avoid exhaustion swap but this itself
 776                   adds more overheads and consumes memory for remembering information.
 777                   Especially if you use 32bit system or small memory system, please
 778                   be careful about enabling this. When memory resource controller
 779                   is disabled by boot option, this will be automatically disabled and
 780                   there will be no overhead from this. Even when you set this config=y,
 781                   if boot option "swapaccount=0" is set, swap will not be accounted.
 782                   Now, memory usage of swap_cgroup is 2 bytes per entry. If swap page
 783                   size is 4096bytes, 512k per 1Gbytes of swap.
 784
 785         config KERNEL_MEMCG_SWAP_ENABLED
 786                 bool "Memory Resource Controller Swap Extension enabled by default"
 787                 depends on KERNEL_MEMCG_SWAP
 788                 help
 789                   Memory Resource Controller Swap Extension comes with its price in
 790                   a bigger memory consumption. General purpose distribution kernels
 791                   which want to enable the feature but keep it disabled by default
 792                   and let the user enable it by swapaccount boot command line
 793                   parameter should have this option unselected.
 794
 795                   Those who want to have the feature enabled by default should
 796                   select this option (if, for some reason, they need to disable it,
 797                   then swapaccount=0 does the trick).
 798
 799
 800         config KERNEL_MEMCG_KMEM
 801                 bool "Memory Resource Controller Kernel Memory accounting (EXPERIMENTAL)"
 802                 default y
 803                 depends on KERNEL_MEMCG
 804                 help
 805                   The Kernel Memory extension for Memory Resource Controller can limit
 806                   the amount of memory used by kernel objects in the system. Those are
 807                   fundamentally different from the entities handled by the standard
 808                   Memory Controller, which are page-based, and can be swapped. Users of
 809                   the kmem extension can use it to guarantee that no group of processes
 810                   will ever exhaust kernel resources alone.
 811
 812         config KERNEL_CGROUP_PERF
 813                 bool "Enable perf_event per-cpu per-container group (cgroup) monitoring"
 814                 select KERNEL_PERF_EVENTS
 815                 help
 816                   This option extends the per-cpu mode to restrict monitoring to
 817                   threads which belong to the cgroup specified and run on the
 818                   designated cpu.
 819
 820         menuconfig KERNEL_CGROUP_SCHED
 821                 bool "Group CPU scheduler"
 822                 default y
 823                 help
 824                   This feature lets CPU scheduler recognize task groups and control CPU
 825                   bandwidth allocation to such task groups. It uses cgroups to group
 826                   tasks.
 827
 828         if KERNEL_CGROUP_SCHED
 829
 830                 config KERNEL_FAIR_GROUP_SCHED
 831                         bool "Group scheduling for SCHED_OTHER"
 832                         default y
 833
 834                 config KERNEL_CFS_BANDWIDTH
 835                         bool "CPU bandwidth provisioning for FAIR_GROUP_SCHED"
 836                         default y
 837                         depends on KERNEL_FAIR_GROUP_SCHED
 838                         help
 839                           This option allows users to define CPU bandwidth rates (limits) for
 840                           tasks running within the fair group scheduler.  Groups with no limit
 841                           set are considered to be unconstrained and will run with no
 842                           restriction.
 843                           See tip/Documentation/scheduler/sched-bwc.txt for more information.
 844
 845                 config KERNEL_RT_GROUP_SCHED
 846                         bool "Group scheduling for SCHED_RR/FIFO"
 847                         default y
 848                         help
 849                           This feature lets you explicitly allocate real CPU bandwidth
 850                           to task groups. If enabled, it will also make it impossible to
 851                           schedule realtime tasks for non-root users until you allocate
 852                           realtime bandwidth for them.
 853
 854         endif
 855
 856         config KERNEL_BLK_CGROUP
 857                 bool "Block IO controller"
 858                 default y
 859                 help
 860                   Generic block IO controller cgroup interface. This is the common
 861                   cgroup interface which should be used by various IO controlling
 862                   policies.
 863
 864                   Currently, CFQ IO scheduler uses it to recognize task groups and
 865                   control disk bandwidth allocation (proportional time slice allocation)
 866                   to such task groups. It is also used by bio throttling logic in
 867                   block layer to implement upper limit in IO rates on a device.
 868
 869                   This option only enables generic Block IO controller infrastructure.
 870                   One needs to also enable actual IO controlling logic/policy. For
 871                   enabling proportional weight division of disk bandwidth in CFQ, set
 872                   CONFIG_CFQ_GROUP_IOSCHED=y; for enabling throttling policy, set
 873                   CONFIG_BLK_DEV_THROTTLING=y.
 874
 875         if KERNEL_BLK_CGROUP
 876
 877                 config KERNEL_CFQ_GROUP_IOSCHED
 878                         bool "Proportional weight of disk bandwidth in CFQ"
 879
 880                 config KERNEL_BLK_DEV_THROTTLING
 881                         bool "Enable throttling policy"
 882                         default y
 883
 884                 config KERNEL_BLK_DEV_THROTTLING_LOW
 885                         bool "Block throttling .low limit interface support (EXPERIMENTAL)"
 886                         depends on KERNEL_BLK_DEV_THROTTLING
 887         endif
 888
 889         config KERNEL_DEBUG_BLK_CGROUP
 890                 bool "Enable Block IO controller debugging"
 891                 depends on KERNEL_BLK_CGROUP
 892                 help
 893                   Enable some debugging help. Currently it exports additional stat
 894                   files in a cgroup which can be useful for debugging.
 895
 896         config KERNEL_NET_CLS_CGROUP
 897                 bool "legacy Control Group Classifier"
 898
 899         config KERNEL_CGROUP_NET_CLASSID
 900                 bool "legacy Network classid cgroup"
 901
 902         config KERNEL_CGROUP_NET_PRIO
 903                 bool "legacy Network priority cgroup"
 904
 905 endif
 906
 907 #
 908 # Namespace support symbols
 909 #
 910
 911 config KERNEL_NAMESPACES
 912         bool "Enable kernel namespaces"
 913         default y if !SMALL_FLASH
 914
 915 if KERNEL_NAMESPACES
 916
 917         config KERNEL_UTS_NS
 918                 bool "UTS namespace"
 919                 default y
 920                 help
 921                   In this namespace, tasks see different info provided
 922                   with the uname() system call.
 923
 924         config KERNEL_IPC_NS
 925                 bool "IPC namespace"
 926                 default y
 927                 help
 928                   In this namespace, tasks work with IPC ids which correspond to
 929                   different IPC objects in different namespaces.
 930
 931         config KERNEL_USER_NS
 932                 bool "User namespace (EXPERIMENTAL)"
 933                 default y
 934                 help
 935                   This allows containers, i.e. vservers, to use user namespaces
 936                   to provide different user info for different servers.
 937
 938         config KERNEL_PID_NS
 939                 bool "PID Namespaces"
 940                 default y
 941                 help
 942                   Support process id namespaces. This allows having multiple
 943                   processes with the same pid as long as they are in different
 944                   pid namespaces. This is a building block of containers.
 945
 946         config KERNEL_NET_NS
 947                 bool "Network namespace"
 948                 default y
 949                 help
 950                   Allow user space to create what appear to be multiple instances
 951                   of the network stack.
 952
 953 endif
 954
 955 config KERNEL_DEVPTS_MULTIPLE_INSTANCES
 956         bool "Support multiple instances of devpts"
 957         default y if !SMALL_FLASH
 958         help
 959           Enable support for multiple instances of devpts filesystem.
 960           If you want to have isolated PTY namespaces (eg: in containers),
 961           say Y here. Otherwise, say N. If enabled, each mount of devpts
 962           filesystem with the '-o newinstance' option will create an
 963           independent PTY namespace.
 964
 965 config KERNEL_POSIX_MQUEUE
 966         bool "POSIX Message Queues"
 967         default y if !SMALL_FLASH
 968         help
 969           POSIX variant of message queues is a part of IPC. In POSIX message
 970           queues every message has a priority which decides about succession
 971           of receiving it by a process. If you want to compile and run
 972           programs written e.g. for Solaris with use of its POSIX message
 973           queues (functions mq_*) say Y here.
 974
 975           POSIX message queues are visible as a filesystem called 'mqueue'
 976           and can be mounted somewhere if you want to do filesystem
 977           operations on message queues.
 978
 979
 980 config KERNEL_SECCOMP_FILTER
 981         bool
 982         default y if !SMALL_FLASH
 983
 984 config KERNEL_SECCOMP
 985         bool "Enable seccomp support"
 986                 depends on !(TARGET_uml)
 987                 select KERNEL_SECCOMP_FILTER
 988                 default y if !SMALL_FLASH
 989                 help
 990                   Build kernel with support for seccomp.
 991
 992 #
 993 # IPv4 configuration
 994 #
 995
 996 config KERNEL_IP_MROUTE
 997         bool "Enable IPv4 multicast routing"
 998         default y
 999         help
1000           Multicast routing requires a multicast routing daemon in
1001           addition to kernel support.
1002
1003 if KERNEL_IP_MROUTE
1004
1005         config KERNEL_IP_MROUTE_MULTIPLE_TABLES
1006                 def_bool y
1007
1008         config KERNEL_IP_PIMSM_V1
1009                 def_bool y
1010
1011         config KERNEL_IP_PIMSM_V2
1012                 def_bool y
1013
1014 endif
1015
1016 #
1017 # IPv6 configuration
1018 #
1019
1020 config KERNEL_IPV6
1021         def_bool IPV6
1022
1023 if KERNEL_IPV6
1024
1025         config KERNEL_IPV6_MULTIPLE_TABLES
1026                 def_bool y
1027
1028         config KERNEL_IPV6_SUBTREES
1029                 def_bool y
1030
1031         config KERNEL_IPV6_MROUTE
1032                 bool "Enable IPv6 multicast routing"
1033                 default y
1034                 help
1035                   Multicast routing requires a multicast routing daemon in
1036                   addition to kernel support.
1037
1038         if KERNEL_IPV6_MROUTE
1039
1040                 config KERNEL_IPV6_MROUTE_MULTIPLE_TABLES
1041                         def_bool y
1042
1043                 config KERNEL_IPV6_PIMSM_V2
1044                         def_bool y
1045
1046         endif
1047
1048         config KERNEL_IPV6_SEG6_LWTUNNEL
1049                 bool "Enable support for lightweight tunnels"
1050                 default y if !SMALL_FLASH
1051                 help
1052                   Using lwtunnel (needed for IPv6 segment routing) requires ip-full package.
1053
1054         config KERNEL_LWTUNNEL_BPF
1055                 def_bool n
1056
1057 endif
1058
1059 #
1060 # Miscellaneous network configuration
1061 #
1062
1063 config KERNEL_NET_L3_MASTER_DEV
1064         bool "L3 Master device support"
1065         help
1066           This module provides glue between core networking code and device
1067           drivers to support L3 master devices like VRF.
1068
1069 config KERNEL_WIRELESS_EXT
1070         def_bool n
1071
1072 config KERNEL_WEXT_CORE
1073         def_bool KERNEL_WIRELESS_EXT
1074
1075 config KERNEL_WEXT_PRIV
1076         def_bool KERNEL_WIRELESS_EXT
1077
1078 config KERNEL_WEXT_PROC
1079         def_bool KERNEL_WIRELESS_EXT
1080
1081 config KERNEL_WEXT_SPY
1082         def_bool KERNEL_WIRELESS_EXT
1083
1084 config KERNEL_PAGE_POOL
1085         def_bool n
1086
1087 config KERNEL_PAGE_POOL_STATS
1088         bool "Page pool stats support"
1089         depends on KERNEL_PAGE_POOL
1090         depends on !LINUX_5_10
1091
1092 #
1093 # NFS related symbols
1094 #
1095 config KERNEL_IP_PNP
1096         bool "Compile the kernel with rootfs on NFS"
1097         help
1098            If you want to make your kernel boot off a NFS server as root
1099            filesystem, select Y here.
1100
1101 if KERNEL_IP_PNP
1102
1103         config KERNEL_IP_PNP_DHCP
1104                 def_bool y
1105
1106         config KERNEL_IP_PNP_BOOTP
1107                 def_bool n
1108
1109         config KERNEL_IP_PNP_RARP
1110                 def_bool n
1111
1112         config KERNEL_NFS_FS
1113                 def_bool y
1114
1115         config KERNEL_NFS_V2
1116                 def_bool y
1117
1118         config KERNEL_NFS_V3
1119                 def_bool y
1120
1121         config KERNEL_ROOT_NFS
1122                 def_bool y
1123
1124 endif
1125
1126 menu "Filesystem ACL and attr support options"
1127         config USE_FS_ACL_ATTR
1128                 bool "Use filesystem ACL and attr support by default"
1129                 help
1130                   Make using ACLs (e.g. POSIX ACL, NFSv4 ACL) the default
1131                   for kernel and packages, except tmpfs, flash filesystems,
1132                   and old NFS.  Also enable userspace extended attribute support
1133                   by default.  (OpenWrt already has an expection it will be
1134                   present in the kernel).
1135
1136         config KERNEL_FS_POSIX_ACL
1137                 bool "Enable POSIX ACL support"
1138                 default y if USE_FS_ACL_ATTR
1139
1140         config KERNEL_BTRFS_FS_POSIX_ACL
1141                 bool "Enable POSIX ACL for BtrFS Filesystems"
1142                 select KERNEL_FS_POSIX_ACL
1143                 default y if USE_FS_ACL_ATTR
1144
1145         config KERNEL_EXT4_FS_POSIX_ACL
1146                 bool "Enable POSIX ACL for Ext4 Filesystems"
1147                 select KERNEL_FS_POSIX_ACL
1148                 default y if USE_FS_ACL_ATTR
1149
1150         config KERNEL_F2FS_FS_POSIX_ACL
1151                 bool "Enable POSIX ACL for F2FS Filesystems"
1152                 select KERNEL_FS_POSIX_ACL
1153
1154         config KERNEL_JFFS2_FS_POSIX_ACL
1155                 bool "Enable POSIX ACL for JFFS2 Filesystems"
1156                 select KERNEL_FS_POSIX_ACL
1157
1158         config KERNEL_TMPFS_POSIX_ACL
1159                 bool "Enable POSIX ACL for TMPFS Filesystems"
1160                 select KERNEL_FS_POSIX_ACL
1161
1162         config KERNEL_CIFS_ACL
1163                 bool "Enable CIFS ACLs"
1164                 select KERNEL_FS_POSIX_ACL
1165                 default y if USE_FS_ACL_ATTR
1166
1167         config KERNEL_HFS_FS_POSIX_ACL
1168                 bool "Enable POSIX ACL for HFS Filesystems"
1169                 select KERNEL_FS_POSIX_ACL
1170                 default y if USE_FS_ACL_ATTR
1171
1172         config KERNEL_HFSPLUS_FS_POSIX_ACL
1173                 bool "Enable POSIX ACL for HFS+ Filesystems"
1174                 select KERNEL_FS_POSIX_ACL
1175                 default y if USE_FS_ACL_ATTR
1176
1177         config KERNEL_NFS_ACL_SUPPORT
1178                 bool "Enable ACLs for NFS"
1179                 default y if USE_FS_ACL_ATTR
1180
1181         config KERNEL_NFS_V3_ACL_SUPPORT
1182                 bool "Enable ACLs for NFSv3"
1183
1184         config KERNEL_NFSD_V2_ACL_SUPPORT
1185                 bool "Enable ACLs for NFSDv2"
1186
1187         config KERNEL_NFSD_V3_ACL_SUPPORT
1188                 bool "Enable ACLs for NFSDv3"
1189
1190         config KERNEL_REISER_FS_POSIX_ACL
1191                 bool "Enable POSIX ACLs for ReiserFS"
1192                 select KERNEL_FS_POSIX_ACL
1193                 default y if USE_FS_ACL_ATTR
1194
1195         config KERNEL_XFS_POSIX_ACL
1196                 bool "Enable POSIX ACLs for XFS"
1197                 select KERNEL_FS_POSIX_ACL
1198                 default y if USE_FS_ACL_ATTR
1199
1200         config KERNEL_JFS_POSIX_ACL
1201                 bool "Enable POSIX ACLs for JFS"
1202                 select KERNEL_FS_POSIX_ACL
1203                 default y if USE_FS_ACL_ATTR
1204
1205 endmenu
1206
1207 config KERNEL_DEVMEM
1208         bool "/dev/mem virtual device support"
1209         help
1210           Say Y here if you want to support the /dev/mem device.
1211           The /dev/mem device is used to access areas of physical
1212           memory.
1213
1214 config KERNEL_DEVKMEM
1215         bool "/dev/kmem virtual device support"
1216         help
1217           Say Y here if you want to support the /dev/kmem device. The
1218           /dev/kmem device is rarely used, but can be used for certain
1219           kind of kernel debugging operations.
1220
1221 config KERNEL_SQUASHFS_FRAGMENT_CACHE_SIZE
1222         int "Number of squashfs fragments cached"
1223         default 2 if (SMALL_FLASH && !LOW_MEMORY_FOOTPRINT)
1224         default 3
1225
1226 config KERNEL_SQUASHFS_XATTR
1227         bool "Squashfs XATTR support"
1228
1229 #
1230 # compile optimization setting
1231 #
1232 choice
1233         prompt "Compiler optimization level"
1234         default KERNEL_CC_OPTIMIZE_FOR_SIZE if SMALL_FLASH
1235
1236 config KERNEL_CC_OPTIMIZE_FOR_PERFORMANCE
1237         bool "Optimize for performance"
1238         help
1239           This is the default optimization level for the kernel, building
1240           with the "-O2" compiler flag for best performance and most
1241           helpful compile-time warnings.
1242
1243 config KERNEL_CC_OPTIMIZE_FOR_SIZE
1244         bool "Optimize for size"
1245         help
1246           Enabling this option will pass "-Os" instead of "-O2" to
1247           your compiler resulting in a smaller kernel.
1248
1249 endchoice
1250
1251 config KERNEL_AUDIT
1252         bool "Auditing support"
1253
1254 config KERNEL_SECURITY
1255         bool "Enable different security models"
1256
1257 config KERNEL_SECURITY_NETWORK
1258         bool "Socket and Networking Security Hooks"
1259         select KERNEL_SECURITY
1260
1261 config KERNEL_SECURITY_SELINUX
1262         bool "NSA SELinux Support"
1263         select KERNEL_SECURITY_NETWORK
1264         select KERNEL_AUDIT
1265
1266 config KERNEL_SECURITY_SELINUX_BOOTPARAM
1267         bool "NSA SELinux boot parameter"
1268         depends on KERNEL_SECURITY_SELINUX
1269         default y
1270
1271 config KERNEL_SECURITY_SELINUX_DISABLE
1272         bool "NSA SELinux runtime disable"
1273         depends on KERNEL_SECURITY_SELINUX
1274
1275 config KERNEL_SECURITY_SELINUX_DEVELOP
1276         bool "NSA SELinux Development Support"
1277         depends on KERNEL_SECURITY_SELINUX
1278         default y
1279
1280 config KERNEL_SECURITY_SELINUX_SIDTAB_HASH_BITS
1281         int
1282         depends on KERNEL_SECURITY_SELINUX
1283         default 9
1284
1285 config KERNEL_SECURITY_SELINUX_SID2STR_CACHE_SIZE
1286         int
1287         depends on KERNEL_SECURITY_SELINUX
1288         default 256
1289
1290 config KERNEL_LSM
1291         string
1292         default "lockdown,yama,loadpin,safesetid,integrity,selinux"
1293         depends on KERNEL_SECURITY_SELINUX
1294
1295 config KERNEL_EXT4_FS_SECURITY
1296         bool "Ext4 Security Labels"
1297
1298 config KERNEL_F2FS_FS_SECURITY
1299         bool "F2FS Security Labels"
1300
1301 config KERNEL_UBIFS_FS_SECURITY
1302         bool "UBIFS Security Labels"
1303
1304 config KERNEL_JFFS2_FS_SECURITY
1305         bool "JFFS2 Security Labels"