cyassl: update to wolfssl version 3.9.6
[openwrt/openwrt.git] / config / Config-kernel.in
1 # Copyright (C) 2006-2014 OpenWrt.org
2 #
3 # This is free software, licensed under the GNU General Public License v2.
4 # See /LICENSE for more information.
5 #
6
7 config KERNEL_BUILD_USER
8 string "Custom Kernel Build User Name"
9 default ""
10 help
11 Sets the Kernel build user string, which for example will be returned
12 by 'uname -a' on running systems.
13 If not set, uses system user at build time.
14
15 config KERNEL_BUILD_DOMAIN
16 string "Custom Kernel Build Domain Name"
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_CRASHLOG
28 bool "Crash logging"
29 depends on !(arm || powerpc || sparc || TARGET_uml)
30 default y
31
32 config KERNEL_SWAP
33 bool "Support for paging of anonymous memory (swap)"
34 default y
35
36 config KERNEL_DEBUG_FS
37 bool "Compile the kernel with debug filesystem enabled"
38 default y
39 help
40 debugfs is a virtual file system that kernel developers use to put
41 debugging files into. Enable this option to be able to read and
42 write to these files. Many common debugging facilities, such as
43 ftrace, require the existence of debugfs.
44
45 config KERNEL_ARM_PMU
46 bool
47 default n
48 depends on (arm || arm64)
49
50 config KERNEL_PERF_EVENTS
51 bool
52 default n
53 select KERNEL_ARM_PMU if (arm || arm64)
54
55 config KERNEL_PROFILING
56 bool "Compile the kernel with profiling enabled"
57 default n
58 select KERNEL_PERF_EVENTS
59 help
60 Enable the extended profiling support mechanisms used by profilers such
61 as OProfile.
62
63 config KERNEL_KALLSYMS
64 bool "Compile the kernel with symbol table information"
65 default y if !SMALL_FLASH
66 help
67 This will give you more information in stack traces from kernel oopses.
68
69 config KERNEL_FTRACE
70 bool "Compile the kernel with tracing support"
71 depends on !TARGET_uml
72 default n
73
74 config KERNEL_FTRACE_SYSCALLS
75 bool "Trace system calls"
76 depends on KERNEL_FTRACE
77 default n
78
79 config KERNEL_ENABLE_DEFAULT_TRACERS
80 bool "Trace process context switches and events"
81 depends on KERNEL_FTRACE
82 default n
83
84 config KERNEL_FUNCTION_TRACER
85 bool "Function tracer"
86 depends on KERNEL_FTRACE
87 default n
88
89 config KERNEL_FUNCTION_GRAPH_TRACER
90 bool "Function graph tracer"
91 depends on KERNEL_FUNCTION_TRACER
92 default n
93
94 config KERNEL_DYNAMIC_FTRACE
95 bool "Enable/disable function tracing dynamically"
96 depends on KERNEL_FUNCTION_TRACER
97 default n
98
99 config KERNEL_FUNCTION_PROFILER
100 bool "Function profiler"
101 depends on KERNEL_FUNCTION_TRACER
102 default n
103
104 config KERNEL_DEBUG_KERNEL
105 bool
106 default n
107
108 config KERNEL_DEBUG_INFO
109 bool "Compile the kernel with debug information"
110 default y
111 select KERNEL_DEBUG_KERNEL
112 help
113 This will compile your kernel and modules with debug information.
114
115 config KERNEL_DEBUG_LL_UART_NONE
116 bool
117 default n
118 depends on arm
119
120 config KERNEL_DEBUG_LL
121 bool
122 default n
123 depends on arm
124 select KERNEL_DEBUG_LL_UART_NONE
125 help
126 ARM low level debugging.
127
128 config KERNEL_DYNAMIC_DEBUG
129 bool "Compile the kernel with dynamic printk"
130 select KERNEL_DEBUG_FS
131 default n
132 help
133 Compiles debug level messages into the kernel, which would not
134 otherwise be available at runtime. These messages can then be
135 enabled/disabled based on various levels of scope - per source file,
136 function, module, format string, and line number. This mechanism
137 implicitly compiles in all pr_debug() and dev_dbg() calls, which
138 enlarges the kernel text size by about 2%.
139
140 config KERNEL_EARLY_PRINTK
141 bool "Compile the kernel with early printk"
142 default y if TARGET_bcm53xx
143 default n
144 depends on arm
145 select KERNEL_DEBUG_KERNEL
146 select KERNEL_DEBUG_LL if arm
147 help
148 Compile the kernel with early printk support. This is only useful for
149 debugging purposes to send messages over the serial console in early boot.
150 Enable this to debug early boot problems.
151
152 config KERNEL_KPROBES
153 bool "Compile the kernel with kprobes support"
154 default n
155 select KERNEL_FTRACE
156 select KERNEL_PERF_EVENTS
157 help
158 Compiles the kernel with KPROBES support, which allows you to trap
159 at almost any kernel address and execute a callback function.
160 register_kprobe() establishes a probepoint and specifies the
161 callback. Kprobes is useful for kernel debugging, non-intrusive
162 instrumentation and testing.
163 If in doubt, say "N".
164
165 config KERNEL_KPROBE_EVENT
166 bool
167 default y if KERNEL_KPROBES
168
169 config KERNEL_AIO
170 bool "Compile the kernel with asynchronous IO support"
171 default n
172
173 config KERNEL_DIRECT_IO
174 bool "Compile the kernel with direct IO support"
175 default n
176
177 config KERNEL_FHANDLE
178 bool "Compile the kernel with support for fhandle syscalls"
179 default n
180
181 config KERNEL_FANOTIFY
182 bool "Compile the kernel with modern file notification support"
183 default n
184
185 config KERNEL_BLK_DEV_BSG
186 bool "Compile the kernel with SCSI generic v4 support for any block device"
187 default n
188
189 config KERNEL_MAGIC_SYSRQ
190 bool "Compile the kernel with SysRq support"
191 default y
192
193 config KERNEL_COREDUMP
194 bool
195
196 config KERNEL_ELF_CORE
197 bool "Enable process core dump support"
198 select KERNEL_COREDUMP
199 default y
200
201 config KERNEL_PROVE_LOCKING
202 bool "Enable kernel lock checking"
203 select KERNEL_DEBUG_KERNEL
204 default n
205
206 config KERNEL_PRINTK_TIME
207 bool "Enable printk timestamps"
208 default y
209
210 config KERNEL_SLUB_DEBUG
211 bool
212
213 config KERNEL_SLUB_DEBUG_ON
214 bool
215
216 config KERNEL_SLABINFO
217 select KERNEL_SLUB_DEBUG
218 select KERNEL_SLUB_DEBUG_ON
219 bool "Enable /proc slab debug info"
220
221 config KERNEL_PROC_PAGE_MONITOR
222 bool "Enable /proc page monitoring"
223
224 config KERNEL_RELAY
225 bool
226
227 config KERNEL_KEXEC
228 bool "Enable kexec support"
229
230 config USE_RFKILL
231 bool "Enable rfkill support"
232 default RFKILL_SUPPORT
233
234 config USE_SPARSE
235 bool "Enable sparse check during kernel build"
236 default n
237
238 config KERNEL_DEVTMPFS
239 bool "Compile the kernel with device tmpfs enabled"
240 default n
241 help
242 devtmpfs is a simple, kernel-managed /dev filesystem. The kernel creates
243 devices nodes for all registered devices ti simplify boot, but leaves more
244 complex tasks to userspace (e.g. udev).
245
246 if KERNEL_DEVTMPFS
247
248 config KERNEL_DEVTMPFS_MOUNT
249 bool "Automatically mount devtmpfs after root filesystem is mounted"
250 default n
251
252 endif
253
254 #
255 # CGROUP support symbols
256 #
257
258 config KERNEL_CGROUPS
259 bool "Enable kernel cgroups"
260 default n
261
262 if KERNEL_CGROUPS
263
264 config KERNEL_CGROUP_DEBUG
265 bool "Example debug cgroup subsystem"
266 default n
267 help
268 This option enables a simple cgroup subsystem that
269 exports useful debugging information about the cgroups
270 framework.
271
272 config KERNEL_FREEZER
273 bool
274 default y if KERNEL_CGROUP_FREEZER
275
276 config KERNEL_CGROUP_FREEZER
277 bool "Freezer cgroup subsystem"
278 default y
279 help
280 Provides a way to freeze and unfreeze all tasks in a
281 cgroup.
282
283 config KERNEL_CGROUP_DEVICE
284 bool "Device controller for cgroups"
285 default y
286 help
287 Provides a cgroup implementing whitelists for devices which
288 a process in the cgroup can mknod or open.
289
290 config KERNEL_CGROUP_PIDS
291 bool "PIDs cgroup subsystem"
292 default y
293 help
294 Provides enforcement of process number limits in the scope of a
295 cgroup.
296
297 config KERNEL_CPUSETS
298 bool "Cpuset support"
299 default n
300 help
301 This option will let you create and manage CPUSETs which
302 allow dynamically partitioning a system into sets of CPUs and
303 Memory Nodes and assigning tasks to run only within those sets.
304 This is primarily useful on large SMP or NUMA systems.
305
306 config KERNEL_PROC_PID_CPUSET
307 bool "Include legacy /proc/<pid>/cpuset file"
308 default n
309 depends on KERNEL_CPUSETS
310
311 config KERNEL_CGROUP_CPUACCT
312 bool "Simple CPU accounting cgroup subsystem"
313 default n
314 help
315 Provides a simple Resource Controller for monitoring the
316 total CPU consumed by the tasks in a cgroup.
317
318 config KERNEL_RESOURCE_COUNTERS
319 bool "Resource counters"
320 default n
321 help
322 This option enables controller independent resource accounting
323 infrastructure that works with cgroups.
324
325 config KERNEL_MM_OWNER
326 bool
327 default y if KERNEL_MEMCG
328
329 config KERNEL_MEMCG
330 bool "Memory Resource Controller for Control Groups"
331 default n
332 depends on KERNEL_RESOURCE_COUNTERS || !LINUX_3_18
333 help
334 Provides a memory resource controller that manages both anonymous
335 memory and page cache. (See Documentation/cgroups/memory.txt)
336
337 Note that setting this option increases fixed memory overhead
338 associated with each page of memory in the system. By this,
339 20(40)bytes/PAGE_SIZE on 32(64)bit system will be occupied by memory
340 usage tracking struct at boot. Total amount of this is printed out
341 at boot.
342
343 Only enable when you're ok with these tradeoffs and really
344 sure you need the memory resource controller. Even when you enable
345 this, you can set "cgroup_disable=memory" at your boot option to
346 disable memory resource controller and you can avoid overheads
347 (but lose benefits of memory resource controller).
348
349 This config option also selects MM_OWNER config option, which
350 could in turn add some fork/exit overhead.
351
352 config KERNEL_MEMCG_SWAP
353 bool "Memory Resource Controller Swap Extension"
354 default n
355 depends on KERNEL_MEMCG
356 help
357 Add swap management feature to memory resource controller. When you
358 enable this, you can limit mem+swap usage per cgroup. In other words,
359 when you disable this, memory resource controller has no cares to
360 usage of swap...a process can exhaust all of the swap. This extension
361 is useful when you want to avoid exhaustion swap but this itself
362 adds more overheads and consumes memory for remembering information.
363 Especially if you use 32bit system or small memory system, please
364 be careful about enabling this. When memory resource controller
365 is disabled by boot option, this will be automatically disabled and
366 there will be no overhead from this. Even when you set this config=y,
367 if boot option "swapaccount=0" is set, swap will not be accounted.
368 Now, memory usage of swap_cgroup is 2 bytes per entry. If swap page
369 size is 4096bytes, 512k per 1Gbytes of swap.
370
371 config KERNEL_MEMCG_SWAP_ENABLED
372 bool "Memory Resource Controller Swap Extension enabled by default"
373 default n
374 depends on KERNEL_MEMCG_SWAP
375 help
376 Memory Resource Controller Swap Extension comes with its price in
377 a bigger memory consumption. General purpose distribution kernels
378 which want to enable the feature but keep it disabled by default
379 and let the user enable it by swapaccount boot command line
380 parameter should have this option unselected.
381
382 Those who want to have the feature enabled by default should
383 select this option (if, for some reason, they need to disable it,
384 then swapaccount=0 does the trick).
385
386
387 config KERNEL_MEMCG_KMEM
388 bool "Memory Resource Controller Kernel Memory accounting (EXPERIMENTAL)"
389 default n
390 depends on KERNEL_MEMCG
391 help
392 The Kernel Memory extension for Memory Resource Controller can limit
393 the amount of memory used by kernel objects in the system. Those are
394 fundamentally different from the entities handled by the standard
395 Memory Controller, which are page-based, and can be swapped. Users of
396 the kmem extension can use it to guarantee that no group of processes
397 will ever exhaust kernel resources alone.
398
399 config KERNEL_CGROUP_PERF
400 bool "Enable perf_event per-cpu per-container group (cgroup) monitoring"
401 select KERNEL_PERF_EVENTS
402 default n
403 help
404 This option extends the per-cpu mode to restrict monitoring to
405 threads which belong to the cgroup specified and run on the
406 designated cpu.
407
408 menuconfig KERNEL_CGROUP_SCHED
409 bool "Group CPU scheduler"
410 default n
411 help
412 This feature lets CPU scheduler recognize task groups and control CPU
413 bandwidth allocation to such task groups. It uses cgroups to group
414 tasks.
415
416 if KERNEL_CGROUP_SCHED
417
418 config KERNEL_FAIR_GROUP_SCHED
419 bool "Group scheduling for SCHED_OTHER"
420 default n
421
422 config KERNEL_CFS_BANDWIDTH
423 bool "CPU bandwidth provisioning for FAIR_GROUP_SCHED"
424 default n
425 depends on KERNEL_FAIR_GROUP_SCHED
426 help
427 This option allows users to define CPU bandwidth rates (limits) for
428 tasks running within the fair group scheduler. Groups with no limit
429 set are considered to be unconstrained and will run with no
430 restriction.
431 See tip/Documentation/scheduler/sched-bwc.txt for more information.
432
433 config KERNEL_RT_GROUP_SCHED
434 bool "Group scheduling for SCHED_RR/FIFO"
435 default n
436 help
437 This feature lets you explicitly allocate real CPU bandwidth
438 to task groups. If enabled, it will also make it impossible to
439 schedule realtime tasks for non-root users until you allocate
440 realtime bandwidth for them.
441
442 endif
443
444 config KERNEL_BLK_CGROUP
445 bool "Block IO controller"
446 default y
447 help
448 Generic block IO controller cgroup interface. This is the common
449 cgroup interface which should be used by various IO controlling
450 policies.
451
452 Currently, CFQ IO scheduler uses it to recognize task groups and
453 control disk bandwidth allocation (proportional time slice allocation)
454 to such task groups. It is also used by bio throttling logic in
455 block layer to implement upper limit in IO rates on a device.
456
457 This option only enables generic Block IO controller infrastructure.
458 One needs to also enable actual IO controlling logic/policy. For
459 enabling proportional weight division of disk bandwidth in CFQ, set
460 CONFIG_CFQ_GROUP_IOSCHED=y; for enabling throttling policy, set
461 CONFIG_BLK_DEV_THROTTLING=y.
462
463 config KERNEL_DEBUG_BLK_CGROUP
464 bool "Enable Block IO controller debugging"
465 default n
466 depends on KERNEL_BLK_CGROUP
467 help
468 Enable some debugging help. Currently it exports additional stat
469 files in a cgroup which can be useful for debugging.
470
471 config KERNEL_NET_CLS_CGROUP
472 bool "Control Group Classifier"
473 default y
474
475 config KERNEL_NETPRIO_CGROUP
476 bool "Network priority cgroup"
477 default y
478
479 endif
480
481 #
482 # Namespace support symbols
483 #
484
485 config KERNEL_NAMESPACES
486 bool "Enable kernel namespaces"
487 default n
488
489 if KERNEL_NAMESPACES
490
491 config KERNEL_UTS_NS
492 bool "UTS namespace"
493 default y
494 help
495 In this namespace, tasks see different info provided
496 with the uname() system call.
497
498 config KERNEL_IPC_NS
499 bool "IPC namespace"
500 default y
501 help
502 In this namespace, tasks work with IPC ids which correspond to
503 different IPC objects in different namespaces.
504
505 config KERNEL_USER_NS
506 bool "User namespace (EXPERIMENTAL)"
507 default y
508 help
509 This allows containers, i.e. vservers, to use user namespaces
510 to provide different user info for different servers.
511
512 config KERNEL_PID_NS
513 bool "PID Namespaces"
514 default y
515 help
516 Support process id namespaces. This allows having multiple
517 processes with the same pid as long as they are in different
518 pid namespaces. This is a building block of containers.
519
520 config KERNEL_NET_NS
521 bool "Network namespace"
522 default y
523 help
524 Allow user space to create what appear to be multiple instances
525 of the network stack.
526
527 endif
528
529 #
530 # LXC related symbols
531 #
532
533 config KERNEL_LXC_MISC
534 bool "Enable miscellaneous LXC related options"
535 default n
536
537 if KERNEL_LXC_MISC
538
539 config KERNEL_DEVPTS_MULTIPLE_INSTANCES
540 bool "Support multiple instances of devpts"
541 default y
542 help
543 Enable support for multiple instances of devpts filesystem.
544 If you want to have isolated PTY namespaces (eg: in containers),
545 say Y here. Otherwise, say N. If enabled, each mount of devpts
546 filesystem with the '-o newinstance' option will create an
547 independent PTY namespace.
548
549 config KERNEL_POSIX_MQUEUE
550 bool "POSIX Message Queues"
551 default y
552 help
553 POSIX variant of message queues is a part of IPC. In POSIX message
554 queues every message has a priority which decides about succession
555 of receiving it by a process. If you want to compile and run
556 programs written e.g. for Solaris with use of its POSIX message
557 queues (functions mq_*) say Y here.
558
559 POSIX message queues are visible as a filesystem called 'mqueue'
560 and can be mounted somewhere if you want to do filesystem
561 operations on message queues.
562
563 endif
564
565 config KERNEL_SECCOMP_FILTER
566 bool
567 default n
568
569 config KERNEL_SECCOMP
570 bool "Enable seccomp support"
571 depends on !(TARGET_uml)
572 select KERNEL_SECCOMP_FILTER
573 default n
574 help
575 Build kernel with support for seccomp.
576
577 #
578 # IPv6 configuration
579 #
580
581 config KERNEL_IPV6
582 def_bool IPV6
583
584 if KERNEL_IPV6
585
586 config KERNEL_IPV6_MULTIPLE_TABLES
587 def_bool y
588
589 config KERNEL_IPV6_SUBTREES
590 def_bool y
591
592 config KERNEL_IPV6_MROUTE
593 def_bool y
594
595 config KERNEL_IPV6_PIMSM_V2
596 def_bool n
597
598 endif
599
600 #
601 # NFS related symbols
602 #
603 config KERNEL_IP_PNP
604 bool "Compile the kernel with rootfs on NFS"
605 help
606 If you want to make your kernel boot off a NFS server as root
607 filesystem, select Y here.
608
609 if KERNEL_IP_PNP
610
611 config KERNEL_IP_PNP_DHCP
612 def_bool y
613
614 config KERNEL_IP_PNP_BOOTP
615 def_bool n
616
617 config KERNEL_IP_PNP_RARP
618 def_bool n
619
620 config KERNEL_NFS_FS
621 def_bool y
622
623 config KERNEL_NFS_V2
624 def_bool y
625
626 config KERNEL_NFS_V3
627 def_bool y
628
629 config KERNEL_ROOT_NFS
630 def_bool y
631
632 endif
633
634 menu "Filesystem ACL and attr support options"
635 config USE_FS_ACL_ATTR
636 bool "Use filesystem ACL and attr support by default"
637 default n
638 help
639 Make using ACLs (e.g. POSIX ACL, NFSv4 ACL) the default
640 for kernel and packages, except tmpfs, flash filesystems,
641 and old NFS. Also enable userspace extended attribute support
642 by default. (OpenWrt already has an expection it will be
643 present in the kernel).
644
645 config KERNEL_FS_POSIX_ACL
646 bool "Enable POSIX ACL support"
647 default y if USE_FS_ACL_ATTR
648
649 config KERNEL_BTRFS_FS_POSIX_ACL
650 bool "Enable POSIX ACL for BtrFS Filesystems"
651 select KERNEL_FS_POSIX_ACL
652 default y if USE_FS_ACL_ATTR
653
654 config KERNEL_EXT4_FS_POSIX_ACL
655 bool "Enable POSIX ACL for Ext4 Filesystems"
656 select KERNEL_FS_POSIX_ACL
657 default y if USE_FS_ACL_ATTR
658
659 config KERNEL_F2FS_FS_POSIX_ACL
660 bool "Enable POSIX ACL for F2FS Filesystems"
661 select KERNEL_FS_POSIX_ACL
662 default n
663
664 config KERNEL_JFFS2_FS_POSIX_ACL
665 bool "Enable POSIX ACL for JFFS2 Filesystems"
666 select KERNEL_FS_POSIX_ACL
667 default n
668
669 config KERNEL_TMPFS_POSIX_ACL
670 bool "Enable POSIX ACL for TMPFS Filesystems"
671 select KERNEL_FS_POSIX_ACL
672 default n
673
674 config KERNEL_CIFS_ACL
675 bool "Enable CIFS ACLs"
676 select KERNEL_FS_POSIX_ACL
677 default y if USE_FS_ACL_ATTR
678
679 config KERNEL_HFS_FS_POSIX_ACL
680 bool "Enable POSIX ACL for HFS Filesystems"
681 select KERNEL_FS_POSIX_ACL
682 default y if USE_FS_ACL_ATTR
683
684 config KERNEL_HFSPLUG_FS_POSIX_ACL
685 bool "Enable POSIX ACL for HFS+ Filesystems"
686 select KERNEL_FS_POSIX_ACL
687 default y if USE_FS_ACL_ATTR
688
689 config KERNEL_NFS_ACL_SUPPORT
690 bool "Enable ACLs for NFS"
691 default y if USE_FS_ACL_ATTR
692
693 config KERNEL_NFS_V3_ACL_SUPPORT
694 bool "Enable ACLs for NFSv3"
695 default n
696
697 config KERNEL_NFSD_V2_ACL_SUPPORT
698 bool "Enable ACLs for NFSDv2"
699 default n
700
701 config KERNEL_NFSD_V3_ACL_SUPPORT
702 bool "Enable ACLs for NFSDv3"
703 default n
704
705 config KERNEL_REISER_FS_POSIX_ACL
706 bool "Enable POSIX ACLs for ReiserFS"
707 select KERNEL_FS_POSIX_ACL
708 default y if USE_FS_ACL_ATTR
709
710 config KERNEL_XFS_POSIX_ACL
711 bool "Enable POSIX ACLs for XFS"
712 select KERNEL_FS_POSIX_ACL
713 default y if USE_FS_ACL_ATTR
714
715 config KERNEL_JFS_POSIX_ACL
716 bool "Enable POSIX ACLs for JFS"
717 select KERNEL_FS_POSIX_ACL
718 default y if USE_FS_ACL_ATTR
719
720 endmenu