xref: /freebsd/sys/conf/NOTES (revision 973d3a82096bc135f6c230e348e2f33c382096bc)
1#
2# NOTES -- Lines that can be cut/pasted into kernel and hints configs.
3#
4# Lines that begin with 'device', 'options', 'machine', 'ident', 'maxusers',
5# 'makeoptions', 'hints', etc. go into the kernel configuration that you
6# run config(8) with.
7#
8# Lines that begin with 'envvar hint.' should go into your hints file.
9# See /boot/device.hints and/or the 'hints' config(8) directive.
10#
11# Please use ``make LINT'' to create an old-style LINT file if you want to
12# do kernel test-builds.
13#
14# This file contains machine independent kernel configuration notes.  For
15# machine dependent notes, look in /sys/<arch>/conf/NOTES.
16#
17
18#
19# NOTES conventions and style guide:
20#
21# Large block comments should begin and end with a line containing only a
22# comment character.
23#
24# To describe a particular object, a block comment (if it exists) should
25# come first.  Next should come device, options, and hints lines in that
26# order.  All device and option lines must be described by a comment that
27# doesn't just expand the device or option name.  Use only a concise
28# comment on the same line if possible.  Very detailed descriptions of
29# devices and subsystems belong in man pages.
30#
31# A space followed by a tab separates 'options' from an option name.  Two
32# spaces followed by a tab separate 'device' from a device name.  Comments
33# after an option or device should use one space after the comment character.
34# To comment out a negative option that disables code and thus should not be
35# enabled for LINT builds, precede 'options' with "#!".
36#
37
38#
39# This is the ``identification'' of the kernel.  Usually this should
40# be the same as the name of your kernel.
41#
42ident		LINT
43
44#
45# The `maxusers' parameter controls the static sizing of a number of
46# internal system tables by a formula defined in subr_param.c.
47# Omitting this parameter or setting it to 0 will cause the system to
48# auto-size based on physical memory.
49#
50maxusers	10
51
52# To statically compile in device wiring instead of /boot/device.hints
53#hints		"LINT.hints"		# Default places to look for devices.
54
55# Use the following to compile in values accessible to the kernel
56# through getenv() (or kenv(1) in userland). The format of the file
57# is 'variable=value', see kenv(1)
58#
59#env		"LINT.env"
60
61#
62# The `makeoptions' parameter allows variables to be passed to the
63# generated Makefile in the build area.
64#
65# CONF_CFLAGS gives some extra compiler flags that are added to ${CFLAGS}
66# after most other flags.  Here we use it to inhibit use of non-optimal
67# gcc built-in functions (e.g., memcmp).
68#
69# DEBUG happens to be magic.
70# The following is equivalent to 'config -g KERNELNAME' and creates
71# 'kernel.debug' compiled with -g debugging as well as a normal
72# 'kernel'.  Use 'make install.debug' to install the debug kernel
73# but that isn't normally necessary as the debug symbols are not loaded
74# by the kernel and are not useful there anyway.
75#
76# KERNEL can be overridden so that you can change the default name of your
77# kernel.
78#
79# MODULES_OVERRIDE can be used to limit modules built to a specific list.
80#
81makeoptions	CONF_CFLAGS=-fno-builtin  #Don't allow use of memcmp, etc.
82#makeoptions	DEBUG=-g		#Build kernel with gdb(1) debug symbols
83#makeoptions	KERNEL=foo		#Build kernel "foo" and install "/foo"
84# Only build ext2fs module plus those parts of the sound system I need.
85#makeoptions	MODULES_OVERRIDE="ext2fs sound/sound sound/driver/maestro3"
86makeoptions	DESTDIR=/tmp
87
88#
89# FreeBSD processes are subject to certain limits to their consumption
90# of system resources.  See getrlimit(2) for more details.  Each
91# resource limit has two values, a "soft" limit and a "hard" limit.
92# The soft limits can be modified during normal system operation, but
93# the hard limits are set at boot time.  Their default values are
94# in sys/<arch>/include/vmparam.h.  There are two ways to change them:
95#
96# 1.  Set the values at kernel build time.  The options below are one
97#     way to allow that limit to grow to 1GB.  They can be increased
98#     further by changing the parameters:
99#
100# 2.  In /boot/loader.conf, set the tunables kern.maxswzone,
101#     kern.maxbcache, kern.maxtsiz, kern.dfldsiz, kern.maxdsiz,
102#     kern.dflssiz, kern.maxssiz and kern.sgrowsiz.
103#
104# The options in /boot/loader.conf override anything in the kernel
105# configuration file.  See the function init_param1 in
106# sys/kern/subr_param.c for more details.
107#
108
109options 	MAXDSIZ=(1024UL*1024*1024)
110options 	MAXSSIZ=(128UL*1024*1024)
111options 	DFLDSIZ=(1024UL*1024*1024)
112
113#
114# BLKDEV_IOSIZE sets the default block size used in user block
115# device I/O.  Note that this value will be overridden by the label
116# when specifying a block device from a label with a non-0
117# partition blocksize.  The default is PAGE_SIZE.
118#
119options 	BLKDEV_IOSIZE=8192
120
121#
122# MAXPHYS and DFLTPHYS
123#
124# These are the maximal and safe 'raw' I/O block device access sizes.
125# Reads and writes will be split into MAXPHYS chunks for known good
126# devices and DFLTPHYS for the rest. Some applications have better
127# performance with larger raw I/O access sizes. Note that certain VM
128# parameters are derived from these values and making them too large
129# can make an unbootable kernel.
130#
131# The defaults are 64K and 128K respectively.
132options 	DFLTPHYS=(64*1024)
133options 	MAXPHYS=(128*1024)
134
135
136# This allows you to actually store this configuration file into
137# the kernel binary itself. See config(8) for more details.
138#
139options 	INCLUDE_CONFIG_FILE     # Include this file in kernel
140
141#
142# Compile-time defaults for various boot parameters
143#
144options 	BOOTVERBOSE=1
145options 	BOOTHOWTO=RB_MULTIPLE
146
147#
148# Compile-time defaults for dmesg boot tagging
149#
150# Default boot tag; may use 'kern.boot_tag' loader tunable to override.  The
151# current boot's tag is also exposed via the 'kern.boot_tag' sysctl.
152options 	BOOT_TAG=\"\"
153# Maximum boot tag size the kernel's static buffer should accommodate.  Maximum
154# size for both BOOT_TAG and the assocated tunable.
155options 	BOOT_TAG_SZ=32
156
157options 	GEOM_BDE		# Disk encryption.
158options 	GEOM_CACHE		# Disk cache.
159options 	GEOM_CONCAT		# Disk concatenation.
160options 	GEOM_ELI		# Disk encryption.
161options 	GEOM_GATE		# Userland services.
162options 	GEOM_JOURNAL		# Journaling.
163options 	GEOM_LABEL		# Providers labelization.
164options 	GEOM_LINUX_LVM		# Linux LVM2 volumes
165options 	GEOM_MAP		# Map based partitioning
166options 	GEOM_MIRROR		# Disk mirroring.
167options 	GEOM_MULTIPATH		# Disk multipath
168options 	GEOM_NOP		# Test class.
169options 	GEOM_PART_APM		# Apple partitioning
170options 	GEOM_PART_BSD		# BSD disklabel
171options 	GEOM_PART_BSD64		# BSD disklabel64
172options 	GEOM_PART_EBR		# Extended Boot Records
173options 	GEOM_PART_GPT		# GPT partitioning
174options 	GEOM_PART_LDM		# Logical Disk Manager
175options 	GEOM_PART_MBR		# MBR partitioning
176options 	GEOM_RAID		# Soft RAID functionality.
177options 	GEOM_RAID3		# RAID3 functionality.
178options 	GEOM_SHSEC		# Shared secret.
179options 	GEOM_STRIPE		# Disk striping.
180options 	GEOM_UZIP		# Read-only compressed disks
181options 	GEOM_VINUM		# Vinum logical volume manager
182options 	GEOM_VIRSTOR		# Virtual storage.
183options 	GEOM_ZERO		# Performance testing helper.
184
185#
186# The root device and filesystem type can be compiled in;
187# this provides a fallback option if the root device cannot
188# be correctly guessed by the bootstrap code, or an override if
189# the RB_DFLTROOT flag (-r) is specified when booting the kernel.
190#
191options 	ROOTDEVNAME=\"ufs:da0s2e\"
192
193
194#####################################################################
195# Scheduler options:
196#
197# Specifying one of SCHED_4BSD or SCHED_ULE is mandatory.  These options
198# select which scheduler is compiled in.
199#
200# SCHED_4BSD is the historical, proven, BSD scheduler.  It has a global run
201# queue and no CPU affinity which makes it suboptimal for SMP.  It has very
202# good interactivity and priority selection.
203#
204# SCHED_ULE provides significant performance advantages over 4BSD on many
205# workloads on SMP machines.  It supports cpu-affinity, per-cpu runqueues
206# and scheduler locks.  It also has a stronger notion of interactivity
207# which leads to better responsiveness even on uniprocessor machines.  This
208# is the default scheduler.
209#
210# SCHED_STATS is a debugging option which keeps some stats in the sysctl
211# tree at 'kern.sched.stats' and is useful for debugging scheduling decisions.
212#
213options 	SCHED_4BSD
214options 	SCHED_STATS
215#options 	SCHED_ULE
216
217#####################################################################
218# SMP OPTIONS:
219#
220# SMP enables building of a Symmetric MultiProcessor Kernel.
221
222# Mandatory:
223options 	SMP			# Symmetric MultiProcessor Kernel
224
225# EARLY_AP_STARTUP releases the Application Processors earlier in the
226# kernel startup process (before devices are probed) rather than at the
227# end.  This is a temporary option for use during the transition from
228# late to early AP startup.
229options 	EARLY_AP_STARTUP
230
231# MAXCPU defines the maximum number of CPUs that can boot in the system.
232# A default value should be already present, for every architecture.
233options 	MAXCPU=32
234
235# NUMA enables use of Non-Uniform Memory Access policies in various kernel
236# subsystems.
237options 	NUMA
238
239# MAXMEMDOM defines the maximum number of memory domains that can boot in the
240# system.  A default value should already be defined by every architecture.
241options 	MAXMEMDOM=2
242
243# ADAPTIVE_MUTEXES changes the behavior of blocking mutexes to spin
244# if the thread that currently owns the mutex is executing on another
245# CPU.  This behavior is enabled by default, so this option can be used
246# to disable it.
247options 	NO_ADAPTIVE_MUTEXES
248
249# ADAPTIVE_RWLOCKS changes the behavior of reader/writer locks to spin
250# if the thread that currently owns the rwlock is executing on another
251# CPU.  This behavior is enabled by default, so this option can be used
252# to disable it.
253options 	NO_ADAPTIVE_RWLOCKS
254
255# ADAPTIVE_SX changes the behavior of sx locks to spin if the thread that
256# currently owns the sx lock is executing on another CPU.
257# This behavior is enabled by default, so this option can be used to
258# disable it.
259options 	NO_ADAPTIVE_SX
260
261# MUTEX_NOINLINE forces mutex operations to call functions to perform each
262# operation rather than inlining the simple cases.  This can be used to
263# shrink the size of the kernel text segment.  Note that this behavior is
264# already implied by the INVARIANT_SUPPORT, INVARIANTS, KTR, LOCK_PROFILING,
265# and WITNESS options.
266options 	MUTEX_NOINLINE
267
268# RWLOCK_NOINLINE forces rwlock operations to call functions to perform each
269# operation rather than inlining the simple cases.  This can be used to
270# shrink the size of the kernel text segment.  Note that this behavior is
271# already implied by the INVARIANT_SUPPORT, INVARIANTS, KTR, LOCK_PROFILING,
272# and WITNESS options.
273options 	RWLOCK_NOINLINE
274
275# SX_NOINLINE forces sx lock operations to call functions to perform each
276# operation rather than inlining the simple cases.  This can be used to
277# shrink the size of the kernel text segment.  Note that this behavior is
278# already implied by the INVARIANT_SUPPORT, INVARIANTS, KTR, LOCK_PROFILING,
279# and WITNESS options.
280options 	SX_NOINLINE
281
282# SMP Debugging Options:
283#
284# CALLOUT_PROFILING enables rudimentary profiling of the callwheel data
285#	  structure used as backend in callout(9).
286# PREEMPTION allows the threads that are in the kernel to be preempted by
287#	  higher priority [interrupt] threads.  It helps with interactivity
288#	  and allows interrupt threads to run sooner rather than waiting.
289# FULL_PREEMPTION instructs the kernel to preempt non-realtime kernel
290#	  threads.  Its sole use is to expose race conditions and other
291#	  bugs during development.  Enabling this option will reduce
292#	  performance and increase the frequency of kernel panics by
293#	  design.  If you aren't sure that you need it then you don't.
294#	  Relies on the PREEMPTION option.  DON'T TURN THIS ON.
295# SLEEPQUEUE_PROFILING enables rudimentary profiling of the hash table
296#	  used to hold active sleep queues as well as sleep wait message
297#	  frequency.
298# TURNSTILE_PROFILING enables rudimentary profiling of the hash table
299#	  used to hold active lock queues.
300# UMTX_PROFILING enables rudimentary profiling of the hash table used
301#	  to hold active lock queues.
302# WITNESS enables the witness code which detects deadlocks and cycles
303#         during locking operations.
304# WITNESS_KDB causes the witness code to drop into the kernel debugger if
305#	  a lock hierarchy violation occurs or if locks are held when going to
306#	  sleep.
307# WITNESS_SKIPSPIN disables the witness checks on spin mutexes.
308options 	PREEMPTION
309options 	FULL_PREEMPTION
310options 	WITNESS
311options 	WITNESS_KDB
312options 	WITNESS_SKIPSPIN
313
314# LOCK_PROFILING - Profiling locks.  See LOCK_PROFILING(9) for details.
315options 	LOCK_PROFILING
316# Set the number of buffers and the hash size.  The hash size MUST be larger
317# than the number of buffers.  Hash size should be prime.
318options 	MPROF_BUFFERS="1536"
319options 	MPROF_HASH_SIZE="1543"
320
321# Profiling for the callout(9) backend.
322options 	CALLOUT_PROFILING
323
324# Profiling for internal hash tables.
325options 	SLEEPQUEUE_PROFILING
326options 	TURNSTILE_PROFILING
327options 	UMTX_PROFILING
328
329# Debugging traces for epoch(9) misuse
330options 	EPOCH_TRACE
331
332#####################################################################
333# COMPATIBILITY OPTIONS
334
335# Old tty interface.
336options 	COMPAT_43TTY
337
338# Note that as a general rule, COMPAT_FREEBSD<n> depends on
339# COMPAT_FREEBSD<n+1>, COMPAT_FREEBSD<n+2>, etc.
340
341# Enable FreeBSD4 compatibility syscalls
342options 	COMPAT_FREEBSD4
343
344# Enable FreeBSD5 compatibility syscalls
345options 	COMPAT_FREEBSD5
346
347# Enable FreeBSD6 compatibility syscalls
348options 	COMPAT_FREEBSD6
349
350# Enable FreeBSD7 compatibility syscalls
351options 	COMPAT_FREEBSD7
352
353# Enable FreeBSD9 compatibility syscalls
354options 	COMPAT_FREEBSD9
355
356# Enable FreeBSD10 compatibility syscalls
357options 	COMPAT_FREEBSD10
358
359# Enable FreeBSD11 compatibility syscalls
360options 	COMPAT_FREEBSD11
361
362# Enable FreeBSD12 compatibility syscalls
363options 	COMPAT_FREEBSD12
364
365# Enable FreeBSD13 compatibility syscalls
366options 	COMPAT_FREEBSD13
367
368# Enable FreeBSD14 compatibility syscalls
369options 	COMPAT_FREEBSD14
370
371# Enable Linux Kernel Programming Interface
372options 	COMPAT_LINUXKPI
373
374#
375# These three options provide support for System V Interface
376# Definition-style interprocess communication, in the form of shared
377# memory, semaphores, and message queues, respectively.
378#
379options 	SYSVSHM
380options 	SYSVSEM
381options 	SYSVMSG
382
383
384#####################################################################
385# DEBUGGING OPTIONS
386
387#
388# Compile with kernel debugger related code.
389#
390options 	KDB
391
392#
393# Print a stack trace of the current thread on the console for a panic.
394#
395options 	KDB_TRACE
396
397#
398# Don't enter the debugger for a panic. Intended for unattended operation
399# where you may want to enter the debugger from the console, but still want
400# the machine to recover from a panic.
401#
402options 	KDB_UNATTENDED
403
404#
405# Enable the ddb debugger backend.
406#
407options 	DDB
408
409#
410# Print the numerical value of symbols in addition to the symbolic
411# representation.
412#
413options 	DDB_NUMSYM
414
415#
416# Enable the remote gdb debugger backend.
417#
418options 	GDB
419
420#
421# Trashes list pointers when they become invalid (i.e., the element is
422# removed from a list).  Relatively inexpensive to enable.
423#
424options 	QUEUE_MACRO_DEBUG_TRASH
425
426#
427# Stores information about the last caller to modify the list object
428# in the list object.  Requires additional memory overhead.
429#
430#options 	QUEUE_MACRO_DEBUG_TRACE
431
432#
433# SYSCTL_DEBUG enables a 'sysctl' debug tree that can be used to dump the
434# contents of the registered sysctl nodes on the console.  It is disabled by
435# default because it generates excessively verbose console output that can
436# interfere with serial console operation.
437#
438options 	SYSCTL_DEBUG
439
440#
441# Enable textdump by default, this disables kernel core dumps.
442#
443options 	TEXTDUMP_PREFERRED
444
445#
446# Enable extra debug messages while performing textdumps.
447#
448options 	TEXTDUMP_VERBOSE
449
450#
451# NO_SYSCTL_DESCR omits the sysctl node descriptions to save space in the
452# resulting kernel.
453options 	NO_SYSCTL_DESCR
454
455#
456# MALLOC_DEBUG_MAXZONES enables multiple uma zones for malloc(9)
457# allocations that are smaller than a page.  The purpose is to isolate
458# different malloc types into hash classes, so that any buffer
459# overruns or use-after-free will usually only affect memory from
460# malloc types in that hash class.  This is purely a debugging tool;
461# by varying the hash function and tracking which hash class was
462# corrupted, the intersection of the hash classes from each instance
463# will point to a single malloc type that is being misused.  At this
464# point inspection or memguard(9) can be used to catch the offending
465# code.
466#
467options 	MALLOC_DEBUG_MAXZONES=8
468
469#
470# DEBUG_MEMGUARD builds and enables memguard(9), a replacement allocator
471# for the kernel used to detect modify-after-free scenarios.  See the
472# memguard(9) man page for more information on usage.
473#
474options 	DEBUG_MEMGUARD
475
476#
477# DEBUG_REDZONE enables buffer underflows and buffer overflows detection for
478# malloc(9).
479#
480options 	DEBUG_REDZONE
481
482#
483# EARLY_PRINTF enables support for calling a special printf (eprintf)
484# very early in the kernel (before cn_init() has been called).  This
485# should only be used for debugging purposes early in boot.  Normally,
486# it is not defined.  It is commented out here because this feature
487# isn't generally available. And the required eputc() isn't defined.
488#
489#options 	EARLY_PRINTF
490
491#
492# KTRACE enables the system-call tracing facility ktrace(2).  To be more
493# SMP-friendly, KTRACE uses a worker thread to process most trace events
494# asynchronously to the thread generating the event.  This requires a
495# pre-allocated store of objects representing trace events.  The
496# KTRACE_REQUEST_POOL option specifies the initial size of this store.
497# The size of the pool can be adjusted both at boottime and runtime via
498# the kern.ktrace_request_pool tunable and sysctl.
499#
500options 	KTRACE			#kernel tracing
501options 	KTRACE_REQUEST_POOL=101
502
503#
504# KTR is a kernel tracing facility imported from BSD/OS.  It is
505# enabled with the KTR option.  KTR_ENTRIES defines the number of
506# entries in the circular trace buffer; it may be an arbitrary number.
507# KTR_BOOT_ENTRIES defines the number of entries during the early boot,
508# before malloc(9) is functional.
509# KTR_COMPILE defines the mask of events to compile into the kernel as
510# defined by the KTR_* constants in <sys/ktr.h>.  KTR_MASK defines the
511# initial value of the ktr_mask variable which determines at runtime
512# what events to trace.  KTR_CPUMASK determines which CPU's log
513# events, with bit X corresponding to CPU X.  The layout of the string
514# passed as KTR_CPUMASK must match a series of bitmasks each of them
515# separated by the "," character (ie:
516# KTR_CPUMASK=0xAF,0xFFFFFFFFFFFFFFFF).  KTR_VERBOSE enables
517# dumping of KTR events to the console by default.  This functionality
518# can be toggled via the debug.ktr_verbose sysctl and defaults to off
519# if KTR_VERBOSE is not defined.  See ktr(4) and ktrdump(8) for details.
520#
521options 	KTR
522options 	KTR_BOOT_ENTRIES=1024
523options 	KTR_ENTRIES=(128*1024)
524options 	KTR_COMPILE=(KTR_ALL)
525options 	KTR_MASK=KTR_INTR
526options 	KTR_CPUMASK=0x3
527options 	KTR_VERBOSE
528
529#
530# ALQ(9) is a facility for the asynchronous queuing of records from the kernel
531# to a vnode, and is employed by services such as ktr(4) to produce trace
532# files based on a kernel event stream.  Records are written asynchronously
533# in a worker thread.
534#
535options 	ALQ
536options 	KTR_ALQ
537
538#
539# The INVARIANTS option is used in a number of source files to enable
540# extra sanity checking of internal structures.  This support is not
541# enabled by default because of the extra time it would take to check
542# for these conditions, which can only occur as a result of
543# programming errors.
544#
545options 	INVARIANTS
546
547#
548# The INVARIANT_SUPPORT option makes us compile in support for
549# verifying some of the internal structures.  It is a prerequisite for
550# 'INVARIANTS', as enabling 'INVARIANTS' will make these functions be
551# called.  The intent is that you can set 'INVARIANTS' for single
552# source files (by changing the source file or specifying it on the
553# command line) if you have 'INVARIANT_SUPPORT' enabled.  Also, if you
554# wish to build a kernel module with 'INVARIANTS', then adding
555# 'INVARIANT_SUPPORT' to your kernel will provide all the necessary
556# infrastructure without the added overhead.
557#
558options 	INVARIANT_SUPPORT
559
560#
561# The KASSERT_PANIC_OPTIONAL option allows kasserts to fire without
562# necessarily inducing a panic.  Panic is the default behavior, but
563# runtime options can configure it either entirely off, or off with a
564# limit.
565#
566options 	KASSERT_PANIC_OPTIONAL
567
568#
569# The DIAGNOSTIC option is used to enable extra debugging information
570# and invariants checking.  The added checks are too expensive or noisy
571# for an INVARIANTS kernel and thus are disabled by default.  It is
572# expected that a kernel configured with DIAGNOSTIC will also have the
573# INVARIANTS option enabled.
574#
575options 	DIAGNOSTIC
576
577#
578# REGRESSION causes optional kernel interfaces necessary only for regression
579# testing to be enabled.  These interfaces may constitute security risks
580# when enabled, as they permit processes to easily modify aspects of the
581# run-time environment to reproduce unlikely or unusual (possibly normally
582# impossible) scenarios.
583#
584options 	REGRESSION
585
586#
587# This option lets some drivers co-exist that can't co-exist in a running
588# system.  This is used to be able to compile all kernel code in one go for
589# quality assurance purposes (like this file, which the option takes it name
590# from.)
591#
592options 	COMPILING_LINT
593
594#
595# STACK enables the stack(9) facility, allowing the capture of kernel stack
596# for the purpose of procinfo(1), etc.  stack(9) will also be compiled in
597# automatically if DDB(4) is compiled into the kernel.
598#
599options 	STACK
600
601#
602# The NUM_CORE_FILES option specifies the limit for the number of core
603# files generated by a particular process, when the core file format
604# specifier includes the %I pattern. Since we only have 1 character for
605# the core count in the format string, meaning the range will be 0-9, the
606# maximum value allowed for this option is 10.
607# This core file limit can be adjusted at runtime via the debug.ncores
608# sysctl.
609#
610options 	NUM_CORE_FILES=5
611
612#
613# The TSLOG option enables timestamped logging of events, especially
614# function entries/exits, in order to track the time spent by the kernel.
615# In particular, this is useful when investigating the early boot process,
616# before it is possible to use more sophisticated tools like DTrace.
617# The TSLOGSIZE option controls the size of the (preallocated, fixed
618# length) buffer used for storing these events (default: 262144 records).
619# The TSLOG_PAGEZERO option enables TSLOG of pmap_zero_page; this must be
620# enabled separately since it typically generates too many records to be
621# useful.
622#
623# For security reasons the TSLOG option should not be enabled on systems
624# used in production.
625#
626options 	TSLOG
627options 	TSLOGSIZE=262144
628
629
630#####################################################################
631# PERFORMANCE MONITORING OPTIONS
632
633#
634# The hwpmc driver that allows the use of in-CPU performance monitoring
635# counters for performance monitoring.  The base kernel needs to be configured
636# with the 'options' line, while the hwpmc device can be either compiled
637# in or loaded as a loadable kernel module.
638#
639# Additional configuration options may be required on specific architectures,
640# please see hwpmc(4).
641
642device		hwpmc			# Driver (also a loadable module)
643options 	HWPMC_DEBUG
644options 	HWPMC_HOOKS		# Other necessary kernel hooks
645
646
647#####################################################################
648# NETWORKING OPTIONS
649
650#
651# Protocol families
652#
653options 	INET			#Internet communications protocols
654options 	INET6			#IPv6 communications protocols
655#
656# Note if you include INET/INET6 or both options
657# You *must* define at least one of the congestion control
658# options or the compile will fail. GENERIC defines
659# options CC_CUBIC. You may want to specify a default
660# if multiple congestion controls are compiled in.
661# The string in default is the name of the
662# cc module as it would appear in the sysctl for
663# setting the default. The code defines CUBIC
664# as default, or the sole cc_module compiled in.
665#
666options 	CC_CDG
667options 	CC_CHD
668options 	CC_CUBIC
669options 	CC_DCTCP
670options 	CC_HD
671options 	CC_HTCP
672options 	CC_NEWRENO
673options 	CC_VEGAS
674options 	CC_DEFAULT=\"cubic\"
675options 	RATELIMIT		# TX rate limiting support
676
677options 	ROUTETABLES=2		# allocated fibs up to 65536. default is 1.
678					# but that would be a bad idea as they are large.
679
680options 	TCP_OFFLOAD		# TCP offload support.
681options  	TCP_RFC7413		# TCP Fast Open
682
683options  	TCPHPTS
684
685# In order to enable IPSEC you MUST also add device crypto to
686# your kernel configuration
687options 	IPSEC			#IP security (requires device crypto)
688
689# Option IPSEC_SUPPORT does not enable IPsec, but makes it possible to
690# load it as a kernel module. You still MUST add device crypto to your kernel
691# configuration.
692options 	IPSEC_SUPPORT
693#options 	IPSEC_DEBUG		#debug for IP security
694
695# Alternative TCP stacks
696options 	TCP_BBR
697options 	TCP_RACK
698
699# TLS framing and encryption/decryption of data over TCP sockets.
700options 	KERN_TLS		# TLS transmit and receive offload
701
702# Netlink kernel/user<>kernel/user messaging interface
703options 	NETLINK
704
705#
706# SMB/CIFS requester
707# NETSMB enables support for SMB protocol, it requires LIBMCHAIN and LIBICONV
708# options.
709options 	NETSMB			#SMB/CIFS requester
710
711# mchain library. It can be either loaded as KLD or compiled into kernel
712options 	LIBMCHAIN
713
714# libalias library, performing NAT
715options 	LIBALIAS
716
717#
718# SCTP is a NEW transport protocol defined by
719# RFC2960 updated by RFC3309 and RFC3758.. and
720# soon to have a new base RFC and many many more
721# extensions. This release supports all the extensions
722# including many drafts (most about to become RFC's).
723# It is the reference implementation of SCTP
724# and is quite well tested.
725#
726# Note YOU MUST have both INET and INET6 defined.
727# You don't have to enable V6, but SCTP is
728# dual stacked and so far we have not torn apart
729# the V6 and V4.. since an association can span
730# both a V6 and V4 address at the SAME time :-)
731#
732# The SCTP_SUPPORT option does not enable SCTP, but provides the necessary
733# support for loading SCTP as a loadable kernel module.
734#
735options 	SCTP
736options 	SCTP_SUPPORT
737
738# There are bunches of options:
739# this one turns on all sorts of
740# nastily printing that you can
741# do. It's all controlled by a
742# bit mask (settable by socket opt and
743# by sysctl). Including will not cause
744# logging until you set the bits.. but it
745# can be quite verbose.. so without this
746# option we don't do any of the tests for
747# bits and prints.. which makes the code run
748# faster.. if you are not debugging don't use.
749options 	SCTP_DEBUG
750
751#
752# All that options after that turn on specific types of
753# logging. You can monitor CWND growth, flight size
754# and all sorts of things. Go look at the code and
755# see. I have used this to produce interesting
756# charts and graphs as well :->
757#
758# I have not yet committed the tools to get and print
759# the logs, I will do that eventually .. before then
760# if you want them send me an email rrs@freebsd.org
761# You basically must have ktr(4) enabled for these
762# and you then set the sysctl to turn on/off various
763# logging bits. Use ktrdump(8) to pull the log and run
764# it through a display program.. and graphs and other
765# things too.
766#
767options 	SCTP_LOCK_LOGGING
768options 	SCTP_MBUF_LOGGING
769options 	SCTP_MBCNT_LOGGING
770options 	SCTP_PACKET_LOGGING
771options 	SCTP_LTRACE_CHUNKS
772options 	SCTP_LTRACE_ERRORS
773
774# OpenFabrics Enterprise Distribution (Infiniband).
775options 	OFED
776options 	OFED_DEBUG_INIT
777
778# Sockets Direct Protocol
779options 	SDP
780options 	SDP_DEBUG
781
782# IP over Infiniband
783options 	IPOIB
784options 	IPOIB_DEBUG
785options 	IPOIB_CM
786
787# altq(9). Enable the base part of the hooks with the ALTQ option.
788# Individual disciplines must be built into the base system and can not be
789# loaded as modules at this point. ALTQ requires a stable TSC so if yours is
790# broken or changes with CPU throttling then you must also have the ALTQ_NOPCC
791# option.
792options 	ALTQ
793options 	ALTQ_CBQ	# Class Based Queueing
794options 	ALTQ_RED	# Random Early Detection
795options 	ALTQ_RIO	# RED In/Out
796options 	ALTQ_CODEL	# CoDel Active Queueing
797options 	ALTQ_HFSC	# Hierarchical Packet Scheduler
798options 	ALTQ_FAIRQ	# Fair Packet Scheduler
799options 	ALTQ_CDNR	# Traffic conditioner
800options 	ALTQ_PRIQ	# Priority Queueing
801options 	ALTQ_NOPCC	# Required if the TSC is unusable
802options 	ALTQ_DEBUG
803
804# netgraph(4). Enable the base netgraph code with the NETGRAPH option.
805# Individual node types can be enabled with the corresponding option
806# listed below; however, this is not strictly necessary as netgraph
807# will automatically load the corresponding KLD module if the node type
808# is not already compiled into the kernel. Each type below has a
809# corresponding man page, e.g., ng_async(8).
810options 	NETGRAPH		# netgraph(4) system
811options 	NETGRAPH_DEBUG		# enable extra debugging, this
812					# affects netgraph(4) and nodes
813# Node types
814options 	NETGRAPH_ASYNC
815options 	NETGRAPH_BLUETOOTH		# ng_bluetooth(4)
816options 	NETGRAPH_BLUETOOTH_HCI		# ng_hci(4)
817options 	NETGRAPH_BLUETOOTH_L2CAP	# ng_l2cap(4)
818options 	NETGRAPH_BLUETOOTH_SOCKET	# ng_btsocket(4)
819options 	NETGRAPH_BLUETOOTH_UBT		# ng_ubt(4)
820options 	NETGRAPH_BLUETOOTH_UBTBCMFW	# ubtbcmfw(4)
821options 	NETGRAPH_BPF
822options 	NETGRAPH_BRIDGE
823options 	NETGRAPH_CAR
824options 	NETGRAPH_CHECKSUM
825options 	NETGRAPH_CISCO
826options 	NETGRAPH_DEFLATE
827options 	NETGRAPH_DEVICE
828options 	NETGRAPH_ECHO
829options 	NETGRAPH_EIFACE
830options 	NETGRAPH_ETHER
831options 	NETGRAPH_FRAME_RELAY
832options 	NETGRAPH_GIF
833options 	NETGRAPH_GIF_DEMUX
834options 	NETGRAPH_HOLE
835options 	NETGRAPH_IFACE
836options 	NETGRAPH_IP_INPUT
837options 	NETGRAPH_IPFW
838options 	NETGRAPH_KSOCKET
839options 	NETGRAPH_L2TP
840options 	NETGRAPH_LMI
841options 	NETGRAPH_MPPC_COMPRESSION
842options 	NETGRAPH_MPPC_ENCRYPTION
843options 	NETGRAPH_NETFLOW
844options 	NETGRAPH_NAT
845options 	NETGRAPH_ONE2MANY
846options 	NETGRAPH_PATCH
847options 	NETGRAPH_PIPE
848options 	NETGRAPH_PPP
849options 	NETGRAPH_PPPOE
850options 	NETGRAPH_PPTPGRE
851options 	NETGRAPH_PRED1
852options 	NETGRAPH_RFC1490
853options 	NETGRAPH_SOCKET
854options 	NETGRAPH_SPLIT
855options 	NETGRAPH_TAG
856options 	NETGRAPH_TCPMSS
857options 	NETGRAPH_TEE
858options 	NETGRAPH_UI
859options 	NETGRAPH_VJC
860options 	NETGRAPH_VLAN
861
862# Network stack virtualization.
863options 	VIMAGE
864options 	VNET_DEBUG	# debug for VIMAGE
865
866#
867# Network interfaces:
868#  The `loop' device is MANDATORY when networking is enabled.
869device		loop
870
871#  The `ether' device provides generic code to handle
872#  Ethernets; it is MANDATORY when an Ethernet device driver is
873#  configured.
874device		ether
875
876#  The `vlan' device implements the VLAN tagging of Ethernet frames
877#  according to IEEE 802.1Q.
878device		vlan
879
880# The `vxlan' device implements the VXLAN encapsulation of Ethernet
881# frames in UDP packets according to RFC7348.
882device		vxlan
883
884#  The `wlan' device provides generic code to support 802.11
885#  drivers, including host AP mode; it is MANDATORY for the wi,
886#  and ath drivers and will eventually be required by all 802.11 drivers.
887device		wlan
888options 	IEEE80211_DEBUG		#enable debugging msgs
889options 	IEEE80211_SUPPORT_MESH	#enable 802.11s D3.0 support
890options 	IEEE80211_SUPPORT_TDMA	#enable TDMA support
891
892#  The `wlan_wep', `wlan_tkip', and `wlan_ccmp' devices provide
893#  support for WEP, TKIP, and AES-CCMP crypto protocols optionally
894#  used with 802.11 devices that depend on the `wlan' module.
895device		wlan_wep
896device		wlan_ccmp
897device		wlan_tkip
898
899#  The `wlan_xauth' device provides support for external (i.e. user-mode)
900#  authenticators for use with 802.11 drivers that use the `wlan'
901#  module and support 802.1x and/or WPA security protocols.
902device		wlan_xauth
903
904#  The `wlan_acl' device provides a MAC-based access control mechanism
905#  for use with 802.11 drivers operating in ap mode and using the
906#  `wlan' module.
907#  The 'wlan_amrr' device provides AMRR transmit rate control algorithm
908device		wlan_acl
909device		wlan_amrr
910
911#  The `bpf' device enables the Berkeley Packet Filter.  Be
912#  aware of the legal and administrative consequences of enabling this
913#  option.  DHCP requires bpf.
914device		bpf
915
916#  The `netmap' device implements memory-mapped access to network
917#  devices from userspace, enabling wire-speed packet capture and
918#  generation even at 10Gbit/s. Requires support in the device
919#  driver. Supported drivers are ixgbe, e1000, re.
920device		netmap
921
922#  The `disc' device implements a minimal network interface,
923#  which throws away all packets sent and never receives any.  It is
924#  included for testing and benchmarking purposes.
925device		disc
926
927# The `epair' device implements a virtual back-to-back connected Ethernet
928# like interface pair.
929device		epair
930
931#  The `edsc' device implements a minimal Ethernet interface,
932#  which discards all packets sent and receives none.
933device		edsc
934
935#  The `tuntap' device implements (user-)ppp, nos-tun(8) and a pty-like virtual
936#  Ethernet interface
937device		tuntap
938
939#  The `gif' device implements IPv6 over IP4 tunneling,
940#  IPv4 over IPv6 tunneling, IPv4 over IPv4 tunneling and
941#  IPv6 over IPv6 tunneling.
942#  The `gre' device implements GRE (Generic Routing Encapsulation) tunneling,
943#  as specified in the RFC 2784 and RFC 2890.
944#  The `me' device implements Minimal Encapsulation within IPv4 as
945#  specified in the RFC 2004.
946#  The XBONEHACK option allows the same pair of addresses to be configured on
947#  multiple gif interfaces.
948device		gif
949device		gre
950device		me
951options 	XBONEHACK
952
953#  The `stf' device implements 6to4 encapsulation.
954device		stf
955
956# The pf packet filter consists of three devices:
957#  The `pf' device provides /dev/pf and the firewall code itself.
958#  The `pflog' device provides the pflog0 interface which logs packets.
959#  The `pfsync' device provides the pfsync0 interface used for
960#   synchronization of firewall state tables (over the net).
961device		pf
962device		pflog
963device		pfsync
964
965# Bridge interface.
966device		if_bridge
967
968# Common Address Redundancy Protocol. See carp(4) for more details.
969device		carp
970
971# IPsec interface.
972device		enc
973
974# Link aggregation interface.
975device		lagg
976
977# WireGuard interface.
978device		wg
979
980#
981# Internet family options:
982#
983# MROUTING enables the kernel multicast packet forwarder, which works
984# with mrouted and XORP.
985#
986# IPFIREWALL enables support for IP firewall construction, in
987# conjunction with the `ipfw' program.  IPFIREWALL_VERBOSE sends
988# logged packets to the system logger.  IPFIREWALL_VERBOSE_LIMIT
989# limits the number of times a matching entry can be logged.
990#
991# WARNING:  IPFIREWALL defaults to a policy of "deny ip from any to any"
992# and if you do not add other rules during startup to allow access,
993# YOU WILL LOCK YOURSELF OUT.  It is suggested that you set firewall_type=open
994# in /etc/rc.conf when first enabling this feature, then refining the
995# firewall rules in /etc/rc.firewall after you've tested that the new kernel
996# feature works properly.
997#
998# IPFIREWALL_DEFAULT_TO_ACCEPT causes the default rule (at boot) to
999# allow everything.  Use with care, if a cracker can crash your
1000# firewall machine, they can get to your protected machines.  However,
1001# if you are using it as an as-needed filter for specific problems as
1002# they arise, then this may be for you.  Changing the default to 'allow'
1003# means that you won't get stuck if the kernel and /sbin/ipfw binary get
1004# out of sync.
1005#
1006# IPDIVERT enables the divert IP sockets, used by ``ipfw divert''.  It
1007# depends on IPFIREWALL if compiled into the kernel.
1008#
1009# IPFIREWALL_NAT adds support for in kernel nat in ipfw, and it requires
1010# LIBALIAS.
1011#
1012# IPFIREWALL_NAT64 adds support for in kernel NAT64 in ipfw.
1013#
1014# IPFIREWALL_NPTV6 adds support for in kernel NPTv6 in ipfw.
1015#
1016# IPFIREWALL_PMOD adds support for protocols modification module. Currently
1017# it supports only TCP MSS modification.
1018#
1019# IPSTEALTH enables code to support stealth forwarding (i.e., forwarding
1020# packets without touching the TTL).  This can be useful to hide firewalls
1021# from traceroute and similar tools.
1022#
1023# PF_DEFAULT_TO_DROP causes the default pf(4) rule to deny everything.
1024#
1025# TCPPCAP enables code which keeps the last n packets sent and received
1026# on a TCP socket.
1027#
1028# TCP_BLACKBOX enables enhanced TCP event logging.
1029#
1030# TCP_HHOOK enables the hhook(9) framework hooks for the TCP stack.
1031#
1032# ROUTE_MPATH provides support for multipath routing.
1033#
1034options 	MROUTING		# Multicast routing
1035options 	IPFIREWALL		#firewall
1036options 	IPFIREWALL_VERBOSE	#enable logging to syslogd(8)
1037options 	IPFIREWALL_VERBOSE_LIMIT=100	#limit verbosity
1038options 	IPFIREWALL_DEFAULT_TO_ACCEPT	#allow everything by default
1039options 	IPFIREWALL_NAT		#ipfw kernel nat support
1040options 	IPFIREWALL_NAT64	#ipfw kernel NAT64 support
1041options 	IPFIREWALL_NPTV6	#ipfw kernel IPv6 NPT support
1042options 	IPDIVERT		#divert sockets
1043options 	IPFILTER		#ipfilter support
1044options 	IPFILTER_LOG		#ipfilter logging
1045options 	IPFILTER_LOOKUP		#ipfilter pools
1046options 	IPFILTER_DEFAULT_BLOCK	#block all packets by default
1047options 	IPSTEALTH		#support for stealth forwarding
1048options 	PF_DEFAULT_TO_DROP	#drop everything by default
1049options 	TCPPCAP
1050options 	TCP_BLACKBOX
1051options 	TCP_HHOOK
1052options 	ROUTE_MPATH
1053
1054# The MBUF_STRESS_TEST option enables options which create
1055# various random failures / extreme cases related to mbuf
1056# functions.  See mbuf(9) for a list of available test cases.
1057# MBUF_PROFILING enables code to profile the mbuf chains
1058# exiting the system (via participating interfaces) and
1059# return a logarithmic histogram of monitored parameters
1060# (e.g. packet size, wasted space, number of mbufs in chain).
1061options 	MBUF_STRESS_TEST
1062options 	MBUF_PROFILING
1063
1064# Statically link in accept filters
1065options 	ACCEPT_FILTER_DATA
1066options 	ACCEPT_FILTER_DNS
1067options 	ACCEPT_FILTER_HTTP
1068
1069# TCP_SIGNATURE adds support for RFC 2385 (TCP-MD5) digests. These are
1070# carried in TCP option 19. This option is commonly used to protect
1071# TCP sessions (e.g. BGP) where IPSEC is not available nor desirable.
1072# This is enabled on a per-socket basis using the TCP_MD5SIG socket option.
1073# This requires the use of 'device crypto' and either 'options IPSEC' or
1074# 'options IPSEC_SUPPORT'.
1075options 	TCP_SIGNATURE		#include support for RFC 2385
1076
1077# DUMMYNET enables the "dummynet" bandwidth limiter.  You need IPFIREWALL
1078# as well.  See dummynet(4) and ipfw(8) for more info.  When you run
1079# DUMMYNET, HZ/kern.hz should be at least 1000 for adequate response.
1080options 	DUMMYNET
1081
1082# The DEBUGNET option enables a basic debug/panic-time networking API.  It
1083# is used by NETDUMP and NETGDB.
1084options 	DEBUGNET
1085
1086# The NETDUMP option enables netdump(4) client support in the kernel.
1087# This allows a panicking kernel to transmit a kernel dump to a remote host.
1088options 	NETDUMP
1089
1090# The NETGDB option enables netgdb(4) support in the kernel.  This allows a
1091# panicking kernel to be debugged as a GDB remote over the network.
1092options 	NETGDB
1093
1094#####################################################################
1095# FILESYSTEM OPTIONS
1096
1097#
1098# Only the root filesystem needs to be statically compiled or preloaded
1099# as module; everything else will be automatically loaded at mount
1100# time.  Some people still prefer to statically compile other
1101# filesystems as well.
1102#
1103# NB: The UNION filesystem was known to be buggy in the past.  It is now
1104# being actively maintained, although there are still some issues being
1105# resolved.
1106#
1107
1108# One of these is mandatory:
1109options 	FFS			#Fast filesystem
1110options 	NFSCL			#Network File System client
1111
1112# The rest are optional:
1113options 	AUTOFS			#Automounter filesystem
1114options 	CD9660			#ISO 9660 filesystem
1115options 	FDESCFS			#File descriptor filesystem
1116options 	FUSEFS			#FUSEFS support module
1117options 	MSDOSFS			#MS DOS File System (FAT, FAT32)
1118options 	NFSLOCKD		#Network Lock Manager
1119options 	NFSD			#Network Filesystem Server
1120options 	KGSSAPI			#Kernel GSSAPI implementation
1121
1122options 	NULLFS			#NULL filesystem
1123options 	PROCFS			#Process filesystem (requires PSEUDOFS)
1124options 	PSEUDOFS		#Pseudo-filesystem framework
1125options 	PSEUDOFS_TRACE		#Debugging support for PSEUDOFS
1126options 	SMBFS			#SMB/CIFS filesystem
1127options 	TMPFS			#Efficient memory filesystem
1128options 	UDF			#Universal Disk Format
1129options 	UNIONFS			#Union filesystem
1130# The xFS_ROOT options REQUIRE the associated ``options xFS''
1131options 	NFS_ROOT		#NFS usable as root device
1132
1133# Soft updates is a technique for improving filesystem speed and
1134# making abrupt shutdown less risky.
1135#
1136options 	SOFTUPDATES
1137
1138# Extended attributes allow additional data to be associated with files,
1139# and is used for ACLs, Capabilities, and MAC labels.
1140# See src/sys/ufs/ufs/README.extattr for more information.
1141options 	UFS_EXTATTR
1142options 	UFS_EXTATTR_AUTOSTART
1143
1144# Access Control List support for UFS filesystems.  The current ACL
1145# implementation requires extended attribute support, UFS_EXTATTR,
1146# for the underlying filesystem.
1147# See src/sys/ufs/ufs/README.acls for more information.
1148options 	UFS_ACL
1149
1150# Directory hashing improves the speed of operations on very large
1151# directories at the expense of some memory.
1152options 	UFS_DIRHASH
1153
1154# Gjournal-based UFS journaling support.
1155options 	UFS_GJOURNAL
1156
1157# Make space in the kernel for a root filesystem on a md device.
1158# Define to the number of kilobytes to reserve for the filesystem.
1159# This is now optional.
1160# If not defined, the root filesystem passed in as the MFS_IMAGE makeoption
1161# will be automatically embedded in the kernel during linking. Its exact size
1162# will be consumed within the kernel.
1163# If defined, the old way of embedding the filesystem in the kernel will be
1164# used. That is to say MD_ROOT_SIZE KB will be allocated in the kernel and
1165# later, the filesystem image passed in as the MFS_IMAGE makeoption will be
1166# dd'd into the reserved space if it fits.
1167options 	MD_ROOT_SIZE=10
1168
1169# Make the md device a potential root device, either with preloaded
1170# images of type mfs_root or md_root.
1171options 	MD_ROOT
1172
1173# Write-protect the md root device so that it may not be mounted writeable.
1174options 	MD_ROOT_READONLY
1175
1176# Allow to read MD image from external memory regions
1177options 	MD_ROOT_MEM
1178
1179# Disk quotas are supported when this option is enabled.
1180options 	QUOTA			#enable disk quotas
1181
1182# If you are running a machine just as a fileserver for PC and MAC
1183# users, using SAMBA, you may consider setting this option
1184# and keeping all those users' directories on a filesystem that is
1185# mounted with the suiddir option. This gives new files the same
1186# ownership as the directory (similar to group). It's a security hole
1187# if you let these users run programs, so confine it to file-servers
1188# (but it'll save you lots of headaches in those cases). Root owned
1189# directories are exempt and X bits are cleared. The suid bit must be
1190# set on the directory as well; see chmod(1). PC owners can't see/set
1191# ownerships so they keep getting their toes trodden on. This saves
1192# you all the support calls as the filesystem it's used on will act as
1193# they expect: "It's my dir so it must be my file".
1194#
1195options 	SUIDDIR
1196
1197# NFS options:
1198options 	NFS_MINATTRTIMO=3	# VREG attrib cache timeout in sec
1199options 	NFS_MAXATTRTIMO=60
1200options 	NFS_MINDIRATTRTIMO=30	# VDIR attrib cache timeout in sec
1201options 	NFS_MAXDIRATTRTIMO=60
1202options 	NFS_DEBUG		# Enable NFS Debugging
1203
1204#
1205# Add support for the EXT2FS filesystem of Linux fame.  Be a bit
1206# careful with this - the ext2fs code has a tendency to lag behind
1207# changes and not be exercised very much, so mounting read/write could
1208# be dangerous (and even mounting read only could result in panics.)
1209#
1210options 	EXT2FS
1211
1212# The system memory devices; /dev/mem, /dev/kmem
1213device		mem
1214
1215# The kernel symbol table device; /dev/ksyms
1216device		ksyms
1217
1218# Optional character code conversion support with LIBICONV.
1219# Each option requires their base file system and LIBICONV.
1220options 	CD9660_ICONV
1221options 	MSDOSFS_ICONV
1222options 	UDF_ICONV
1223
1224
1225#####################################################################
1226# POSIX P1003.1B
1227
1228# Real time extensions added in the 1993 POSIX
1229# _KPOSIX_PRIORITY_SCHEDULING: Build in _POSIX_PRIORITY_SCHEDULING
1230
1231options 	_KPOSIX_PRIORITY_SCHEDULING
1232# p1003_1b_semaphores are very experimental,
1233# user should be ready to assist in debugging if problems arise.
1234options 	P1003_1B_SEMAPHORES
1235
1236# POSIX message queue
1237options 	P1003_1B_MQUEUE
1238
1239#####################################################################
1240# SECURITY POLICY PARAMETERS
1241
1242# Support for BSM audit
1243options 	AUDIT
1244
1245# Support for Mandatory Access Control (MAC):
1246options 	MAC
1247options 	MAC_BIBA
1248options 	MAC_BSDEXTENDED
1249options 	MAC_DDB
1250options 	MAC_IFOFF
1251options 	MAC_IPACL
1252options 	MAC_LOMAC
1253options 	MAC_MLS
1254options 	MAC_NONE
1255options 	MAC_NTPD
1256options 	MAC_PARTITION
1257options 	MAC_PORTACL
1258options 	MAC_PRIORITY
1259options 	MAC_SEEOTHERUIDS
1260options 	MAC_STUB
1261options 	MAC_TEST
1262options 	MAC_VERIEXEC
1263options 	MAC_VERIEXEC_SHA1
1264options 	MAC_VERIEXEC_SHA256
1265options 	MAC_VERIEXEC_SHA384
1266options 	MAC_VERIEXEC_SHA512
1267device		mac_veriexec_parser
1268
1269# Support for Capsicum
1270options 	CAPABILITIES	# fine-grained rights on file descriptors
1271options 	CAPABILITY_MODE	# sandboxes with no global namespace access
1272
1273
1274#####################################################################
1275# CLOCK OPTIONS
1276
1277# The granularity of operation is controlled by the kernel option HZ (default
1278# frequency of 1000 Hz or a period 1ms between calls). Virtual machine guests
1279# use a value of 100. Lower values may lower overhead at the expense of accuracy
1280# of scheduling, though the adaptive tick code reduces that overhead.
1281
1282options 	HZ=100
1283
1284# Enable support for the kernel PLL to use an external PPS signal,
1285# under supervision of [x]ntpd(8)
1286# More info in ntpd documentation: http://www.eecis.udel.edu/~ntp
1287
1288options 	PPS_SYNC
1289
1290# Enable support for generic feed-forward clocks in the kernel.
1291# The feed-forward clock support is an alternative to the feedback oriented
1292# ntpd/system clock approach, and is to be used with a feed-forward
1293# synchronization algorithm such as the RADclock:
1294# More info here: http://www.synclab.org/radclock
1295
1296options 	FFCLOCK
1297
1298
1299#####################################################################
1300# SCSI DEVICES
1301
1302# SCSI DEVICE CONFIGURATION
1303
1304# The SCSI subsystem consists of the `base' SCSI code, a number of
1305# high-level SCSI device `type' drivers, and the low-level host-adapter
1306# device drivers.  The host adapters are listed in the ISA and PCI
1307# device configuration sections below.
1308#
1309# It is possible to wire down your SCSI devices so that a given bus,
1310# target, and LUN always come on line as the same device unit.  In
1311# earlier versions the unit numbers were assigned in the order that
1312# the devices were probed on the SCSI bus.  This means that if you
1313# removed a disk drive, you may have had to rewrite your /etc/fstab
1314# file, and also that you had to be careful when adding a new disk
1315# as it may have been probed earlier and moved your device configuration
1316# around.
1317
1318# This old behavior is maintained as the default behavior.  The unit
1319# assignment begins with the first non-wired down unit for a device
1320# type.  For example, if you wire a disk as "da3" then the first
1321# non-wired disk will be assigned da4.
1322
1323# The syntax for wiring down devices is:
1324
1325envvar		hint.scbus.0.at="ahc0"
1326envvar		hint.scbus.1.at="ahc1"
1327envvar		hint.scbus.1.bus="0"
1328envvar		hint.scbus.3.at="ahc2"
1329envvar		hint.scbus.3.bus="0"
1330envvar		hint.scbus.2.at="ahc2"
1331envvar		hint.scbus.2.bus="1"
1332envvar		hint.da.0.at="scbus0"
1333envvar		hint.da.0.target="0"
1334envvar		hint.da.0.unit="0"
1335envvar		hint.da.1.at="scbus3"
1336envvar		hint.da.1.target="1"
1337envvar		hint.da.2.at="scbus2"
1338envvar		hint.da.2.target="3"
1339envvar		hint.sa.1.at="scbus1"
1340envvar		hint.sa.1.target="6"
1341
1342# "units" (SCSI logical unit number) that are not specified are
1343# treated as if specified as LUN 0.
1344
1345# All SCSI devices allocate as many units as are required.
1346
1347# The ch driver drives SCSI Media Changer ("jukebox") devices.
1348#
1349# The da driver drives SCSI Direct Access ("disk") and Optical Media
1350# ("WORM") devices.
1351#
1352# The sa driver drives SCSI Sequential Access ("tape") devices.
1353#
1354# The cd driver drives SCSI Read Only Direct Access ("cd") devices.
1355#
1356# The ses driver drives SCSI Environment Services ("ses") and
1357# SAF-TE ("SCSI Accessible Fault-Tolerant Enclosure") devices.
1358#
1359# The pt driver drives SCSI Processor devices.
1360#
1361# The sg driver provides a passthrough API that is compatible with the
1362# Linux SG driver.  It will work in conjunction with the Linuxulator
1363# to run linux SG apps.  It can also stand on its own and provide
1364# source level API compatibility for porting apps to FreeBSD.
1365#
1366# Target Mode support is provided here but also requires that a SIM
1367# (SCSI Host Adapter Driver) provide support as well.
1368#
1369# The targ driver provides target mode support as a Processor type device.
1370# It exists to give the minimal context necessary to respond to Inquiry
1371# commands. There is a sample user application that shows how the rest
1372# of the command support might be done in /usr/share/examples/scsi_target.
1373#
1374# The targbh driver provides target mode support and exists to respond
1375# to incoming commands that do not otherwise have a logical unit assigned
1376# to them.
1377#
1378# The pass driver provides a passthrough API to access the CAM subsystem.
1379
1380device		scbus		#base SCSI code
1381device		ch		#SCSI media changers
1382device		da		#SCSI direct access devices (aka disks)
1383device		sa		#SCSI tapes
1384device		cd		#SCSI CD-ROMs
1385device		ses		#Enclosure Services (SES and SAF-TE)
1386device		pt		#SCSI processor
1387device		targ		#SCSI Target Mode Code
1388device		targbh		#SCSI Target Mode Blackhole Device
1389device		pass		#CAM passthrough driver
1390device		sg		#Linux SCSI passthrough
1391device		ctl		#CAM Target Layer
1392
1393# CAM OPTIONS:
1394# debugging options:
1395# CAMDEBUG		Compile in all possible debugging.
1396# CAM_DEBUG_COMPILE	Debug levels to compile in.
1397# CAM_DEBUG_FLAGS	Debug levels to enable on boot.
1398# CAM_DEBUG_BUS		Limit debugging to the given bus.
1399# CAM_DEBUG_TARGET	Limit debugging to the given target.
1400# CAM_DEBUG_LUN		Limit debugging to the given lun.
1401# CAM_DEBUG_DELAY	Delay in us after printing each debug line.
1402# CAM_IO_STATS		Publish additional CAM device statics by sysctl
1403#
1404# CAM_MAX_HIGHPOWER: Maximum number of concurrent high power (start unit) cmds
1405# SCSI_NO_SENSE_STRINGS: When defined disables sense descriptions
1406# SCSI_NO_OP_STRINGS: When defined disables opcode descriptions
1407# SCSI_DELAY: The number of MILLISECONDS to freeze the SIM (scsi adapter)
1408#             queue after a bus reset, and the number of milliseconds to
1409#             freeze the device queue after a bus device reset.  This
1410#             can be changed at boot and runtime with the
1411#             kern.cam.scsi_delay tunable/sysctl.
1412options 	CAMDEBUG
1413options 	CAM_DEBUG_COMPILE=-1
1414options 	CAM_DEBUG_FLAGS=(CAM_DEBUG_INFO|CAM_DEBUG_PROBE|CAM_DEBUG_PERIPH)
1415options 	CAM_DEBUG_BUS=-1
1416options 	CAM_DEBUG_TARGET=-1
1417options 	CAM_DEBUG_LUN=-1
1418options 	CAM_DEBUG_DELAY=1
1419options 	CAM_MAX_HIGHPOWER=4
1420options 	SCSI_NO_SENSE_STRINGS
1421options 	SCSI_NO_OP_STRINGS
1422options 	SCSI_DELAY=5000	# Be pessimistic about Joe SCSI device
1423options 	CAM_IOSCHED_DYNAMIC
1424options 	CAM_IO_STATS
1425options 	CAM_TEST_FAILURE
1426
1427# Options for the CAM CDROM driver:
1428# CHANGER_MIN_BUSY_SECONDS: Guaranteed minimum time quantum for a changer LUN
1429# CHANGER_MAX_BUSY_SECONDS: Maximum time quantum per changer LUN, only
1430#                           enforced if there is I/O waiting for another LUN
1431# The compiled in defaults for these variables are 2 and 10 seconds,
1432# respectively.
1433#
1434# These can also be changed on the fly with the following sysctl variables:
1435# kern.cam.cd.changer.min_busy_seconds
1436# kern.cam.cd.changer.max_busy_seconds
1437#
1438options 	CHANGER_MIN_BUSY_SECONDS=2
1439options 	CHANGER_MAX_BUSY_SECONDS=10
1440
1441# Options for the CAM sequential access driver:
1442# SA_IO_TIMEOUT: Timeout for read/write/wfm  operations, in minutes
1443# SA_SPACE_TIMEOUT: Timeout for space operations, in minutes
1444# SA_REWIND_TIMEOUT: Timeout for rewind operations, in minutes
1445# SA_ERASE_TIMEOUT: Timeout for erase operations, in minutes
1446# SA_1FM_AT_EOD: Default to model which only has a default one filemark at EOT.
1447options 	SA_IO_TIMEOUT=4
1448options 	SA_SPACE_TIMEOUT=60
1449options 	SA_REWIND_TIMEOUT=(2*60)
1450options 	SA_ERASE_TIMEOUT=(4*60)
1451options 	SA_1FM_AT_EOD
1452
1453# Optional timeout for the CAM processor target (pt) device
1454# This is specified in seconds.  The default is 60 seconds.
1455options 	SCSI_PT_DEFAULT_TIMEOUT=60
1456
1457# Optional enable of doing SES passthrough on other devices (e.g., disks)
1458#
1459# Normally disabled because a lot of newer SCSI disks report themselves
1460# as having SES capabilities, but this can then clot up attempts to build
1461# a topology with the SES device that's on the box these drives are in....
1462options 	SES_ENABLE_PASSTHROUGH
1463
1464
1465#####################################################################
1466# MISCELLANEOUS DEVICES AND OPTIONS
1467
1468device		pty		#BSD-style compatibility pseudo ttys
1469device		nmdm		#back-to-back tty devices
1470device		md		#Memory/malloc disk
1471device		snp		#Snoop device - to look at pty/vty/etc..
1472device		ccd		#Concatenated disk driver
1473device		firmware	#firmware(9) support
1474
1475# Kernel side iconv library
1476options 	LIBICONV
1477
1478# Size of the kernel message buffer.  Should be N * pagesize.
1479options 	MSGBUF_SIZE=40960
1480
1481
1482#####################################################################
1483# HARDWARE BUS CONFIGURATION
1484
1485#
1486# PCI bus & PCI options:
1487#
1488device		pci
1489options 	PCI_HP			# PCI-Express native HotPlug
1490options 	PCI_IOV			# PCI SR-IOV support
1491
1492
1493#####################################################################
1494# HARDWARE DEVICE CONFIGURATION
1495
1496# For ISA the required hints are listed.
1497# PCI, CardBus, and SD/MMC are self identifying buses, so
1498# no hints are needed.
1499
1500#
1501# Mandatory devices:
1502#
1503
1504# These options are valid for other keyboard drivers as well.
1505options 	KBD_DISABLE_KEYMAP_LOAD	# refuse to load a keymap
1506options 	KBD_INSTALL_CDEV	# install a CDEV entry in /dev
1507
1508# Define keyboard latency (try 200/15 for a snappy interactive console)
1509options 	KBD_DELAY1=200		# define initial key delay
1510options 	KBD_DELAY2=15		# define key delay
1511
1512device		kbdmux			# keyboard multiplexer
1513options 	KBDMUX_DFLT_KEYMAP	# specify the built-in keymap
1514makeoptions	KBDMUX_DFLT_KEYMAP=it.iso
1515
1516options 	FB_DEBUG		# Frame buffer debugging
1517
1518# Enable experimental features of the syscons terminal emulator (teken).
1519options 	TEKEN_CONS25		# cons25-style terminal emulation
1520options 	TEKEN_UTF8		# UTF-8 output handling
1521
1522# The vt video console driver.
1523device		vt
1524options 	VT_ALT_TO_ESC_HACK=1	# Prepend ESC sequence to ALT keys
1525options 	VT_MAXWINDOWS=16	# Number of virtual consoles
1526options 	VT_TWOBUTTON_MOUSE	# Use right mouse button to paste
1527
1528# The following options set the maximum framebuffer size.
1529options 	VT_FB_MAX_HEIGHT=480
1530options 	VT_FB_MAX_WIDTH=640
1531
1532# The following options will let you change the default vt terminal colors.
1533options 	TERMINAL_NORM_ATTR=(FG_GREEN|BG_BLACK)
1534options 	TERMINAL_KERN_ATTR=(FG_LIGHTRED|BG_BLACK)
1535
1536#
1537# Optional devices:
1538#
1539
1540#
1541# SCSI host adapters:
1542#
1543# aacraid: Adaptec by PMC RAID controllers, Series 6/7/8 and upcoming
1544#          families. Container interface, CAM required.
1545# ahc: Adaptec 274x/284x/2910/293x/294x/394x/3950x/3960x/398X/4944/
1546#      19160x/29160x, aic7770/aic78xx
1547# ahd: Adaptec 29320/39320 Controllers.
1548# isp: Qlogic ISP 1020, 1040 and 1040B PCI SCSI host adapters,
1549#      ISP 1240 Dual Ultra SCSI, ISP 1080 and 1280 (Dual) Ultra2,
1550#      ISP 12160 Ultra3 SCSI,
1551#      Qlogic ISP 2100 and ISP 2200 1Gb Fibre Channel host adapters.
1552#      Qlogic ISP 2300 and ISP 2312 2Gb Fibre Channel host adapters.
1553#      Qlogic ISP 2322 and ISP 6322 2Gb Fibre Channel host adapters.
1554# ispfw: Firmware module for Qlogic host adapters
1555# mpr: LSI-Logic MPT/Fusion Gen 3
1556# mps: LSI-Logic MPT/Fusion Gen 2
1557# mpt: LSI-Logic MPT/Fusion 53c1020 or 53c1030 Ultra4
1558#      or FC9x9 Fibre Channel host adapters.
1559# sym: Symbios/Logic 53C8XX family of PCI-SCSI I/O processors:
1560#      53C810, 53C810A, 53C815, 53C825,  53C825A, 53C860, 53C875,
1561#      53C876, 53C885,  53C895, 53C895A, 53C896,  53C897, 53C1510D,
1562#      53C1010-33, 53C1010-66.
1563
1564device		aacraid
1565device		ahc
1566device		ahd
1567device		isp
1568envvar		hint.isp.0.disable="1"
1569envvar		hint.isp.0.role="3"
1570envvar		hint.isp.0.prefer_iomap="1"
1571envvar		hint.isp.0.prefer_memmap="1"
1572envvar		hint.isp.0.fwload_disable="1"
1573envvar		hint.isp.0.ignore_nvram="1"
1574envvar		hint.isp.0.fullduplex="1"
1575envvar		hint.isp.0.topology="lport"
1576envvar		hint.isp.0.topology="nport"
1577envvar		hint.isp.0.topology="lport-only"
1578envvar		hint.isp.0.topology="nport-only"
1579# we can't get u_int64_t types, nor can we get strings if it's got
1580# a leading 0x, hence this silly dodge.
1581envvar		hint.isp.0.portwnn="w50000000aaaa0000"
1582envvar		hint.isp.0.nodewnn="w50000000aaaa0001"
1583device		ispfw
1584device		mpr			# LSI-Logic MPT-Fusion 3
1585device		mps			# LSI-Logic MPT-Fusion 2
1586device		mpt			# LSI-Logic MPT-Fusion
1587device		sym
1588
1589# The aic7xxx driver will attempt to use memory mapped I/O for all PCI
1590# controllers that have it configured only if this option is set. Unfortunately,
1591# this doesn't work on some motherboards, which prevents it from being the
1592# default.
1593options 	AHC_ALLOW_MEMIO
1594
1595# Dump the contents of the ahc controller configuration PROM.
1596options 	AHC_DUMP_EEPROM
1597
1598# Bitmap of units to enable targetmode operations.
1599options 	AHC_TMODE_ENABLE
1600
1601# Compile in Aic7xxx Debugging code.
1602options 	AHC_DEBUG
1603
1604# Aic7xxx driver debugging options. See sys/dev/aic7xxx/aic7xxx.h
1605options 	AHC_DEBUG_OPTS
1606
1607# Print register bitfields in debug output.  Adds ~128k to driver
1608# See ahc(4).
1609options 	AHC_REG_PRETTY_PRINT
1610
1611# Compile in aic79xx debugging code.
1612options 	AHD_DEBUG
1613
1614# Aic79xx driver debugging options.  Adds ~215k to driver.  See ahd(4).
1615options 	AHD_DEBUG_OPTS=0xFFFFFFFF
1616
1617# Print human-readable register definitions when debugging
1618options 	AHD_REG_PRETTY_PRINT
1619
1620# Bitmap of units to enable targetmode operations.
1621options 	AHD_TMODE_ENABLE
1622
1623# Options used in dev/iscsi (Software iSCSI stack)
1624#
1625options 	ISCSI_INITIATOR_DEBUG=9
1626
1627# Options used in dev/isp/ (Qlogic SCSI/FC driver).
1628#
1629#	ISP_TARGET_MODE		-	enable target mode operation
1630#
1631options 	ISP_TARGET_MODE=1
1632#
1633#	ISP_DEFAULT_ROLES	-	default role
1634#		none=0
1635#		target=1
1636#		initiator=2
1637#		both=3			(not supported currently)
1638#
1639#	ISP_INTERNAL_TARGET		(trivial internal disk target, for testing)
1640#
1641options 	ISP_DEFAULT_ROLES=0
1642
1643#options 	SYM_SETUP_SCSI_DIFF	#-HVD support for 825a, 875, 885
1644					# disabled:0 (default), enabled:1
1645#options 	SYM_SETUP_PCI_PARITY	#-PCI parity checking
1646					# disabled:0, enabled:1 (default)
1647#options 	SYM_SETUP_MAX_LUN	#-Number of LUNs supported
1648					# default:8, range:[1..64]
1649
1650#
1651# Compaq "CISS" RAID controllers (SmartRAID 5* series)
1652# These controllers have a SCSI-like interface, and require the
1653# CAM infrastructure.
1654#
1655device		ciss
1656
1657#
1658# Compaq Smart RAID, Mylex DAC960 and AMI MegaRAID controllers.  Only
1659# one entry is needed; the code will find and configure all supported
1660# controllers.
1661#
1662device		ida		# Compaq Smart RAID
1663device		mlx		# Mylex DAC960
1664device		mfi		# LSI MegaRAID SAS
1665device		mfip		# LSI MegaRAID SAS passthrough, requires CAM
1666options 	MFI_DEBUG
1667device		mrsas		# LSI/Avago MegaRAID SAS/SATA, 6Gb/s and 12Gb/s
1668
1669#
1670# Serial ATA host controllers:
1671#
1672# ahci: Advanced Host Controller Interface (AHCI) compatible
1673# mvs:  Marvell 88SX50XX/88SX60XX/88SX70XX/SoC controllers
1674# siis: SiliconImage SiI3124/SiI3132/SiI3531 controllers
1675#
1676# These drivers are part of cam(4) subsystem. They supersede less featured
1677# ata(4) subsystem drivers, supporting same hardware.
1678
1679device		ahci
1680device		mvs
1681device		siis
1682
1683#
1684# The 'ATA' driver supports all legacy ATA/ATAPI controllers, including
1685# PC Card devices. You only need one "device ata" for it to find all
1686# PCI and PC Card ATA/ATAPI devices on modern machines.
1687# Alternatively, individual bus and chipset drivers may be chosen by using
1688# the 'atacore' driver then selecting the drivers on a per vendor basis.
1689# For example to build a system which only supports a VIA chipset,
1690# omit 'ata' and include the 'atacore', 'atapci' and 'atavia' drivers.
1691device		ata
1692
1693# Modular ATA
1694#device		atacore		# Core ATA functionality
1695#device		ataisa		# ISA bus support
1696#device		atapci		# PCI bus support; only generic chipset support
1697
1698# PCI ATA chipsets
1699#device		ataacard	# ACARD
1700#device		ataacerlabs	# Acer Labs Inc. (ALI)
1701#device		ataamd		# American Micro Devices (AMD)
1702#device		ataati		# ATI
1703#device		atacenatek	# Cenatek
1704#device		atacypress	# Cypress
1705#device		atacyrix	# Cyrix
1706#device		atahighpoint	# HighPoint
1707#device		ataintel	# Intel
1708#device		ataite		# Integrated Technology Inc. (ITE)
1709#device		atajmicron	# JMicron
1710#device		atamarvell	# Marvell
1711#device		atamicron	# Micron
1712#device		atanational	# National
1713#device		atanetcell	# NetCell
1714#device		atanvidia	# nVidia
1715#device		atapromise	# Promise
1716#device		ataserverworks	# ServerWorks
1717#device		atasiliconimage	# Silicon Image Inc. (SiI) (formerly CMD)
1718#device		atasis		# Silicon Integrated Systems Corp.(SiS)
1719#device		atavia		# VIA Technologies Inc.
1720
1721#
1722# For older non-PCI, non-PnPBIOS systems, these are the hints lines to add:
1723envvar		hint.ata.0.at="isa"
1724envvar		hint.ata.0.port="0x1f0"
1725envvar		hint.ata.0.irq="14"
1726envvar		hint.ata.1.at="isa"
1727envvar		hint.ata.1.port="0x170"
1728envvar		hint.ata.1.irq="15"
1729
1730#
1731# uart: generic driver for serial interfaces.
1732#
1733device		uart
1734
1735# Options for uart(4)
1736options 	UART_PPS_ON_CTS		# Do time pulse capturing using CTS
1737					# instead of DCD.
1738options 	UART_POLL_FREQ		# Set polling rate, used when hw has
1739					# no interrupt support (50 Hz default).
1740
1741# The following hint should only be used for pure ISA devices.  It is not
1742# needed otherwise.  Use of hints is strongly discouraged.
1743envvar		hint.uart.0.at="isa"
1744
1745# The following 3 hints are used when the UART is a system device (i.e., a
1746# console or debug port), but only on platforms that don't have any other
1747# means to pass the information to the kernel.  The unit number of the hint
1748# is only used to bundle the hints together.  There is no relation to the
1749# unit number of the probed UART.
1750envvar		hint.uart.0.port="0x3f8"
1751envvar		hint.uart.0.flags="0x10"
1752envvar		hint.uart.0.baud="115200"
1753
1754# `flags' for serial drivers that support consoles, like uart(4):
1755#	0x10	enable console support for this unit.  Other console flags
1756#		(if applicable) are ignored unless this is set.  Enabling
1757#		console support does not make the unit the preferred console.
1758#		Boot with -h or set boot_serial=YES in the loader.
1759#		Currently, at most one unit can have console support; the
1760#		first one (in config file order) with this flag set is
1761#		preferred.
1762#	0x80	use this port for serial line gdb support in ddb.  Also known
1763#		as debug port.
1764#
1765
1766# Options for serial drivers that support consoles:
1767options 	BREAK_TO_DEBUGGER	# A BREAK/DBG on the console goes to
1768					# ddb, if available.
1769
1770# Solaris implements a new BREAK which is initiated by a character
1771# sequence CR ~ ^b which is similar to a familiar pattern used on
1772# Sun servers by the Remote Console.  There are FreeBSD extensions:
1773# CR ~ ^p requests force panic and CR ~ ^r requests a clean reboot.
1774options 	ALT_BREAK_TO_DEBUGGER
1775
1776# Serial Communications Controller
1777# Supports the Freescale/NXP QUad Integrated and Zilog Z8530 multi-channel
1778# communications controllers.
1779device		scc
1780
1781# PCI Universal Communications driver
1782# Supports various multi port PCI I/O cards.
1783device		puc
1784
1785#
1786# Network interfaces:
1787#
1788# MII bus support is required for many PCI Ethernet NICs,
1789# namely those which use MII-compliant transceivers or implement
1790# transceiver control interfaces that operate like an MII.  Adding
1791# "device miibus" to the kernel config pulls in support for the generic
1792# miibus API, the common support for bit-bang'ing the MII and all
1793# of the PHY drivers, including a generic one for PHYs that aren't
1794# specifically handled by an individual driver.  Support for specific
1795# PHYs may be built by adding "device mii", "device mii_bitbang" if
1796# needed by the NIC driver and then adding the appropriate PHY driver.
1797device  	mii		# Minimal MII support
1798device  	mii_bitbang	# Common module for bit-bang'ing the MII
1799device  	miibus		# MII support w/ bit-bang'ing and all PHYs
1800
1801device  	acphy		# Altima Communications AC101
1802device  	amphy		# AMD AM79c873 / Davicom DM910{1,2}
1803device  	atphy		# Attansic/Atheros F1
1804device  	axphy		# Asix Semiconductor AX88x9x
1805device  	bmtphy		# Broadcom BCM5201/BCM5202 and 3Com 3c905C
1806device		bnxt		# Broadcom NetXtreme-C/NetXtreme-E
1807device  	brgphy		# Broadcom BCM54xx/57xx 1000baseTX
1808device  	cgem		# Cadence GEM Gigabit Ethernet
1809device  	ciphy		# Cicada/Vitesse CS/VSC8xxx
1810device  	e1000phy	# Marvell 88E1000 1000/100/10-BT
1811device  	gentbi		# Generic 10-bit 1000BASE-{LX,SX} fiber ifaces
1812device  	icsphy		# ICS ICS1889-1893
1813device  	ip1000phy	# IC Plus IP1000A/IP1001
1814device  	jmphy		# JMicron JMP211/JMP202
1815device  	lxtphy		# Level One LXT-970
1816device  	nsgphy		# NatSemi DP8361/DP83865/DP83891
1817device  	nsphy		# NatSemi DP83840A
1818device  	nsphyter	# NatSemi DP83843/DP83815
1819device  	pnaphy		# HomePNA
1820device  	qsphy		# Quality Semiconductor QS6612
1821device  	rdcphy		# RDC Semiconductor R6040
1822device  	rgephy		# RealTek 8169S/8110S/8211B/8211C
1823device  	rlphy		# RealTek 8139
1824device  	rlswitch	# RealTek 8305
1825device  	smcphy		# SMSC LAN91C111
1826device  	tdkphy		# TDK 89Q2120
1827device  	truephy		# LSI TruePHY
1828device		xmphy		# XaQti XMAC II
1829
1830# ae:   Support for gigabit ethernet adapters based on the Attansic/Atheros
1831#       L2 PCI-Express FastEthernet controllers.
1832# age:  Support for gigabit ethernet adapters based on the Attansic/Atheros
1833#       L1 PCI express gigabit ethernet controllers.
1834# alc:  Support for Atheros AR8131/AR8132 PCIe ethernet controllers.
1835# ale:  Support for Atheros AR8121/AR8113/AR8114 PCIe ethernet controllers.
1836# ath:  Atheros a/b/g WiFi adapters (requires ath_hal and wlan)
1837# bce:	Broadcom NetXtreme II (BCM5706/BCM5708) PCI/PCIe Gigabit Ethernet
1838#       adapters.
1839# bfe:	Broadcom BCM4401 Ethernet adapter.
1840# bge:	Support for gigabit ethernet adapters based on the Broadcom
1841#	BCM570x family of controllers, including the 3Com 3c996-T,
1842#	the Netgear GA302T, the SysKonnect SK-9D21 and SK-9D41, and
1843#	the embedded gigE NICs on Dell PowerEdge 2550 servers.
1844# bnxt:	Broadcom NetXtreme-C and NetXtreme-E PCIe 10/25/50G Ethernet adapters.
1845# bxe:	Broadcom NetXtreme II (BCM5771X/BCM578XX) PCIe 10Gb Ethernet
1846#       adapters.
1847# bwi:	Broadcom BCM430* and BCM431* family of wireless adapters.
1848# bwn:	Broadcom BCM43xx family of wireless adapters.
1849# cas:	Sun Cassini/Cassini+ and National Semiconductor DP83065 Saturn
1850# cxgb: Chelsio T3 based 1GbE/10GbE PCIe Ethernet adapters.
1851# cxgbe:Chelsio T4, T5, and T6-based 1/10/25/40/100GbE PCIe Ethernet
1852#	adapters.
1853# cxgbev: Chelsio T4, T5, and T6-based PCIe Virtual Functions.
1854# dc:   Support for PCI fast ethernet adapters based on the DEC/Intel 21143
1855#       and various workalikes including:
1856#       the ADMtek AL981 Comet and AN985 Centaur, the ASIX Electronics
1857#       AX88140A and AX88141, the Davicom DM9100 and DM9102, the Lite-On
1858#       82c168 and 82c169 PNIC, the Lite-On/Macronix LC82C115 PNIC II
1859#       and the Macronix 98713/98713A/98715/98715A/98725 PMAC. This driver
1860#       replaces the old al, ax, dm, pn and mx drivers.  List of brands:
1861#       Digital DE500-BA, Kingston KNE100TX, D-Link DFE-570TX, SOHOware SFA110,
1862#       SVEC PN102-TX, CNet Pro110B, 120A, and 120B, Compex RL100-TX,
1863#       LinkSys LNE100TX, LNE100TX V2.0, Jaton XpressNet, Alfa Inc GFC2204,
1864#       KNE110TX.
1865# em:   Intel Pro/1000 Gigabit Ethernet 82542, 82543, 82544 based adapters.
1866# fxp:  Intel EtherExpress Pro/100B
1867#	(hint of prefer_iomap can be done to prefer I/O instead of Mem mapping)
1868# gem:  Apple GMAC/Sun ERI/Sun GEM
1869# jme:  JMicron JMC260 Fast Ethernet/JMC250 Gigabit Ethernet based adapters.
1870# le:   AMD Am7900 LANCE and Am79C9xx PCnet
1871# lge:	Support for PCI gigabit ethernet adapters based on the Level 1
1872#	LXT1001 NetCellerator chipset. This includes the D-Link DGE-500SX,
1873#	SMC TigerCard 1000 (SMC9462SX), and some Addtron cards.
1874# lio:  Support for Cavium 23XX Ethernet adapters
1875# malo: Marvell Libertas wireless NICs.
1876# mwl:  Marvell 88W8363 802.11n wireless NICs.
1877#	Requires the mwl firmware module
1878# mwlfw: Marvell 88W8363 firmware
1879# msk:	Support for gigabit ethernet adapters based on the Marvell/SysKonnect
1880#	Yukon II Gigabit controllers, including 88E8021, 88E8022, 88E8061,
1881#	88E8062, 88E8035, 88E8036, 88E8038, 88E8050, 88E8052, 88E8053,
1882#	88E8055, 88E8056 and D-Link 560T/550SX.
1883# mlxfw: Mellanox firmware update module.
1884# mlx5:	Mellanox ConnectX-4 and ConnectX-4 LX IB and Eth shared code module.
1885# mlx5en:Mellanox ConnectX-4 and ConnectX-4 LX PCIe Ethernet adapters.
1886# my:	Myson Fast Ethernet (MTD80X, MTD89X)
1887# nge:	Support for PCI gigabit ethernet adapters based on the National
1888#	Semiconductor DP83820 and DP83821 chipset. This includes the
1889#	SMC EZ Card 1000 (SMC9462TX), D-Link DGE-500T, Asante FriendlyNet
1890#	GigaNIX 1000TA and 1000TPC, the Addtron AEG320T, the Surecom
1891#	EP-320G-TX and the Netgear GA622T.
1892# oce:	Emulex 10 Gbit adapters (OneConnect Ethernet)
1893# ral:	Ralink Technology IEEE 802.11 wireless adapter
1894# re:   RealTek 8139C+/8169/816xS/811xS/8101E PCI/PCIe Ethernet adapter
1895# rl:   Support for PCI fast ethernet adapters based on the RealTek 8129/8139
1896#       chipset.  Note that the RealTek driver defaults to using programmed
1897#       I/O to do register accesses because memory mapped mode seems to cause
1898#       severe lockups on SMP hardware.  This driver also supports the
1899#       Accton EN1207D `Cheetah' adapter, which uses a chip called
1900#       the MPX 5030/5038, which is either a RealTek in disguise or a
1901#       RealTek workalike.  Note that the D-Link DFE-530TX+ uses the RealTek
1902#       chipset and is supported by this driver, not the 'vr' driver.
1903# rtwn: RealTek wireless adapters.
1904# rtwnfw: RealTek wireless firmware.
1905# sge:  Silicon Integrated Systems SiS190/191 Fast/Gigabit Ethernet adapter
1906# sis:  Support for NICs based on the Silicon Integrated Systems SiS 900,
1907#       SiS 7016 and NS DP83815 PCI fast ethernet controller chips.
1908# sk:   Support for the SysKonnect SK-984x series PCI gigabit ethernet NICs.
1909#       This includes the SK-9841 and SK-9842 single port cards (single mode
1910#       and multimode fiber) and the SK-9843 and SK-9844 dual port cards
1911#       (also single mode and multimode).
1912#       The driver will autodetect the number of ports on the card and
1913#       attach each one as a separate network interface.
1914# ste:  Sundance Technologies ST201 PCI fast ethernet controller, includes
1915#       the D-Link DFE-550TX.
1916# stge: Support for gigabit ethernet adapters based on the Sundance/Tamarack
1917#       TC9021 family of controllers, including the Sundance ST2021/ST2023,
1918#       the Sundance/Tamarack TC9021, the D-Link DL-4000 and ASUS NX1101.
1919# ti:   Support for PCI gigabit ethernet NICs based on the Alteon Networks
1920#       Tigon 1 and Tigon 2 chipsets.  This includes the Alteon AceNIC, the
1921#       3Com 3c985, the Netgear GA620 and various others.  Note that you will
1922#       probably want to bump up kern.ipc.nmbclusters a lot to use this driver.
1923# vr:   Support for various fast ethernet adapters based on the VIA
1924#       Technologies VT3043 `Rhine I' and VT86C100A `Rhine II' chips,
1925#       including the D-Link DFE520TX and D-Link DFE530TX (see 'rl' for
1926#       DFE530TX+), the Hawking Technologies PN102TX, and the AOpen/Acer ALN-320.
1927# vte:  DM&P Vortex86 RDC R6040 Fast Ethernet
1928# xl:   Support for the 3Com 3c900, 3c905, 3c905B and 3c905C (Fast)
1929#       Etherlink XL cards and integrated controllers.  This includes the
1930#       integrated 3c905B-TX chips in certain Dell Optiplex and Dell
1931#       Precision desktop machines and the integrated 3c905-TX chips
1932#       in Dell Latitude laptop docking stations.
1933#       Also supported: 3Com 3c980(C)-TX, 3Com 3cSOHO100-TX, 3Com 3c450-TX
1934
1935# PCI Ethernet NICs that use the common MII bus controller code.
1936device		ae		# Attansic/Atheros L2 FastEthernet
1937device		age		# Attansic/Atheros L1 Gigabit Ethernet
1938device		alc		# Atheros AR8131/AR8132 Ethernet
1939device		ale		# Atheros AR8121/AR8113/AR8114 Ethernet
1940device		bce		# Broadcom BCM5706/BCM5708 Gigabit Ethernet
1941device		bfe		# Broadcom BCM440x 10/100 Ethernet
1942device		bge		# Broadcom BCM570xx Gigabit Ethernet
1943device		cas		# Sun Cassini/Cassini+ and NS DP83065 Saturn
1944device		dc		# DEC/Intel 21143 and various workalikes
1945device		et		# Agere ET1310 10/100/Gigabit Ethernet
1946device		fxp		# Intel EtherExpress PRO/100B (82557, 82558)
1947envvar		hint.fxp.0.prefer_iomap="0"
1948device		gem		# Apple GMAC/Sun ERI/Sun GEM
1949device		jme		# JMicron JMC250 Gigabit/JMC260 Fast Ethernet
1950device		lge		# Level 1 LXT1001 gigabit Ethernet
1951device		lio		# Support for Cavium 23XX Ethernet adapters
1952device		mlxfw		# Mellanox firmware update module
1953device		mlx5		# Shared code module between IB and Ethernet
1954device		mlx5en		# Mellanox ConnectX-4 and ConnectX-4 LX
1955device		msk		# Marvell/SysKonnect Yukon II Gigabit Ethernet
1956device		my		# Myson Fast Ethernet (MTD80X, MTD89X)
1957device		nge		# NatSemi DP83820 gigabit Ethernet
1958device		re		# RealTek 8139C+/8169/8169S/8110S
1959device		rl		# RealTek 8129/8139
1960device		sge		# Silicon Integrated Systems SiS190/191
1961device		sis		# Silicon Integrated Systems SiS 900/SiS 7016
1962device		sk		# SysKonnect SK-984x & SK-982x gigabit Ethernet
1963device		ste		# Sundance ST201 (D-Link DFE-550TX)
1964device		stge		# Sundance/Tamarack TC9021 gigabit Ethernet
1965device		vr		# VIA Rhine, Rhine II
1966device		vte		# DM&P Vortex86 RDC R6040 Fast Ethernet
1967device		xl		# 3Com 3c90x (``Boomerang'', ``Cyclone'')
1968
1969# PCI/PCI-X/PCIe Ethernet NICs that use iflib infrastructure
1970device		iflib
1971device		em		# Intel Pro/1000 Gigabit Ethernet
1972device		ix		# Intel Pro/10Gbe PCIE Ethernet
1973device		ixv		# Intel Pro/10Gbe PCIE Ethernet VF
1974
1975# PCI Ethernet NICs.
1976device		cxgb		# Chelsio T3 10 Gigabit Ethernet
1977device		cxgb_t3fw	# Chelsio T3 10 Gigabit Ethernet firmware
1978device		cxgbe		# Chelsio T4-T6 1/10/25/40/100 Gigabit Ethernet
1979device		cxgbev		# Chelsio T4-T6 Virtual Functions
1980device		le		# AMD Am7900 LANCE and Am79C9xx PCnet
1981device		mxge		# Myricom Myri-10G 10GbE NIC
1982device		oce		# Emulex 10 GbE (OneConnect Ethernet)
1983device		ti		# Alteon Networks Tigon I/II gigabit Ethernet
1984
1985# PCI IEEE 802.11 Wireless NICs
1986device		ath		# Atheros pci/cardbus NIC's
1987device		ath_hal		# pci/cardbus chip support
1988#device		ath_ar5210	# AR5210 chips
1989#device		ath_ar5211	# AR5211 chips
1990#device		ath_ar5212	# AR5212 chips
1991#device		ath_rf2413
1992#device		ath_rf2417
1993#device		ath_rf2425
1994#device		ath_rf5111
1995#device		ath_rf5112
1996#device		ath_rf5413
1997#device		ath_ar5416	# AR5416 chips
1998# All of the AR5212 parts have a problem when paired with the AR71xx
1999# CPUS.  These parts have a bug that triggers a fatal bus error on the AR71xx
2000# only.  Details of the exact nature of the bug are sketchy, but some can be
2001# found at https://forum.openwrt.org/viewtopic.php?pid=70060 on pages 4, 5 and
2002# 6.  This option enables this workaround.  There is a performance penalty
2003# for this work around, but without it things don't work at all.  The DMA
2004# from the card usually bursts 128 bytes, but on the affected CPUs, only
2005# 4 are safe.
2006options    	AH_RXCFG_SDMAMW_4BYTES
2007#device		ath_ar9160	# AR9160 chips
2008#device		ath_ar9280	# AR9280 chips
2009#device		ath_ar9285	# AR9285 chips
2010device		ath_rate_sample	# SampleRate tx rate control for ath
2011device		bwi		# Broadcom BCM430* BCM431*
2012device		bwn		# Broadcom BCM43xx
2013device		malo		# Marvell Libertas wireless NICs.
2014device		mwl		# Marvell 88W8363 802.11n wireless NICs.
2015device		mwlfw
2016device		ral		# Ralink Technology RT2500 wireless NICs.
2017device		rtwn		# Realtek wireless NICs
2018device		rtwnfw
2019
2020# Use sf_buf(9) interface for jumbo buffers on ti(4) controllers.
2021#options 	TI_SF_BUF_JUMBO
2022# Turn on the header splitting option for the ti(4) driver firmware.  This
2023# only works for Tigon II chips, and has no effect for Tigon I chips.
2024# This option requires the TI_SF_BUF_JUMBO option above.
2025#options 	TI_JUMBO_HDRSPLIT
2026
2027# These two options allow manipulating the mbuf cluster size and mbuf size,
2028# respectively.  Be very careful with NIC driver modules when changing
2029# these from their default values, because that can potentially cause a
2030# mismatch between the mbuf size assumed by the kernel and the mbuf size
2031# assumed by a module.  The only driver that currently has the ability to
2032# detect a mismatch is ti(4).
2033options 	MCLSHIFT=11	# mbuf cluster shift in bits, 11 == 2KB
2034options 	MSIZE=256	# mbuf size in bytes
2035
2036#
2037# Sound drivers
2038#
2039# sound: The generic sound driver.
2040#
2041
2042device		sound
2043
2044#
2045# snd_*: Device-specific drivers.
2046#
2047# The flags of the device tell the device a bit more info about the
2048# device that normally is obtained through the PnP interface.
2049#	bit  2..0   secondary DMA channel;
2050#	bit  4      set if the board uses two dma channels;
2051#	bit 15..8   board type, overrides autodetection; leave it
2052#		    zero if don't know what to put in (and you don't,
2053#		    since this is unsupported at the moment...).
2054#
2055# snd_als4000:		Avance Logic ALS4000 PCI.
2056# snd_atiixp:		ATI IXP 200/300/400 PCI.
2057# snd_cmi:		CMedia CMI8338/CMI8738 PCI.
2058# snd_cs4281:		Crystal Semiconductor CS4281 PCI.
2059# snd_csa:		Crystal Semiconductor CS461x/428x PCI. (except
2060#			4281)
2061# snd_emu10k1:		Creative EMU10K1 PCI and EMU10K2 (Audigy) PCI.
2062# snd_emu10kx:		Creative SoundBlaster Live! and Audigy
2063# snd_envy24:		VIA Envy24 and compatible, needs snd_spicds.
2064# snd_envy24ht:		VIA Envy24HT and compatible, needs snd_spicds.
2065# snd_es137x:		Ensoniq AudioPCI ES137x PCI.
2066# snd_fm801:		Forte Media FM801 PCI.
2067# snd_hda:		Intel High Definition Audio (Controller) and
2068#			compatible.
2069# snd_hdspe:		RME HDSPe AIO and RayDAT.
2070# snd_ich:		Intel ICH AC'97 and some more audio controllers
2071#			embedded in a chipset, for example nVidia
2072#			nForce controllers.
2073# snd_maestro3:		ESS Technology Maestro-3/Allegro PCI.
2074# snd_neomagic:		Neomagic 256 AV/ZX PCI.
2075# snd_solo:		ESS Solo-1x PCI.
2076# snd_spicds:		SPI codec driver, needed by Envy24/Envy24HT drivers.
2077# snd_t4dwave:		Trident 4DWave DX/NX PCI, Sis 7018 PCI and Acer Labs
2078#			M5451 PCI.
2079# snd_uaudio:		USB audio.
2080# snd_via8233:		VIA VT8233x PCI.
2081# snd_via82c686:	VIA VT82C686A PCI.
2082# snd_vibes:		S3 Sonicvibes PCI.
2083
2084device		snd_als4000
2085device		snd_atiixp
2086device		snd_cmi
2087device		snd_cs4281
2088device		snd_csa
2089device		snd_emu10k1
2090device		snd_emu10kx
2091device		snd_envy24
2092device		snd_envy24ht
2093device		snd_es137x
2094device		snd_fm801
2095device		snd_hda
2096device		snd_hdspe
2097device		snd_ich
2098device		snd_maestro3
2099device		snd_neomagic
2100device		snd_solo
2101device		snd_spicds
2102device		snd_t4dwave
2103device		snd_uaudio
2104device		snd_via8233
2105device		snd_via82c686
2106device		snd_vibes
2107
2108# For non-PnP sound cards:
2109envvar		hint.pcm.0.at="isa"
2110envvar		hint.pcm.0.irq="10"
2111envvar		hint.pcm.0.drq="1"
2112envvar		hint.pcm.0.flags="0x0"
2113envvar		hint.sbc.0.at="isa"
2114envvar		hint.sbc.0.port="0x220"
2115envvar		hint.sbc.0.irq="5"
2116envvar		hint.sbc.0.drq="1"
2117envvar		hint.sbc.0.flags="0x15"
2118envvar		hint.gusc.0.at="isa"
2119envvar		hint.gusc.0.port="0x220"
2120envvar		hint.gusc.0.irq="5"
2121envvar		hint.gusc.0.drq="1"
2122envvar		hint.gusc.0.flags="0x13"
2123
2124#
2125# Following options are intended for debugging/testing purposes:
2126#
2127# SND_DEBUG                    Enable extra debugging code that includes
2128#                              sanity checking and possible increase of
2129#                              verbosity.
2130#
2131# SND_DIAGNOSTIC               Similar in a spirit of INVARIANTS/DIAGNOSTIC,
2132#                              zero tolerance against inconsistencies.
2133#
2134# SND_FEEDER_MULTIFORMAT       By default, only 16/32 bit feeders are compiled
2135#                              in. This options enable most feeder converters
2136#                              except for 8bit. WARNING: May bloat the kernel.
2137#
2138# SND_FEEDER_FULL_MULTIFORMAT  Ditto, but includes 8bit feeders as well.
2139#
2140# SND_FEEDER_RATE_HP           (feeder_rate) High precision 64bit arithmetic
2141#                              as much as possible (the default trying to
2142#                              avoid it). Possible slowdown.
2143#
2144# SND_PCM_64                   (Only applicable for i386/32bit arch)
2145#                              Process 32bit samples through 64bit
2146#                              integer/arithmetic. Slight increase of dynamic
2147#                              range at a cost of possible slowdown.
2148#
2149# SND_OLDSTEREO                Only 2 channels are allowed, effectively
2150#                              disabling multichannel processing.
2151#
2152options 	SND_DEBUG
2153options 	SND_DIAGNOSTIC
2154options 	SND_FEEDER_MULTIFORMAT
2155options 	SND_FEEDER_FULL_MULTIFORMAT
2156options 	SND_FEEDER_RATE_HP
2157options 	SND_PCM_64
2158options 	SND_OLDSTEREO
2159
2160#
2161# Cardbus
2162#
2163# cbb: pci/CardBus bridge implementing YENTA interface
2164# cardbus: CardBus slots
2165device		cbb
2166device		cardbus
2167
2168#
2169# MMC/SD
2170#
2171# mmc 		MMC/SD bus
2172# mmcsd		MMC/SD memory card
2173# sdhci		Generic PCI SD Host Controller
2174# rtsx		Realtek SD card reader (RTS5209, RTS5227, ...)
2175device		mmc
2176device		mmcsd
2177device		sdhci
2178device		rtsx
2179
2180#
2181# SMB bus
2182#
2183# System Management Bus support is provided by the 'smbus' device.
2184# Access to the SMBus device is via the 'smb' device (/dev/smb*),
2185# which is a child of the 'smbus' device.
2186#
2187# Supported devices:
2188# smb		standard I/O through /dev/smb*
2189#
2190# Supported SMB interfaces:
2191# iicsmb	I2C to SMB bridge with any iicbus interface
2192# intpm		Intel PIIX4 (82371AB, 82443MX) Power Management Unit
2193# alpm		Acer Aladdin-IV/V/Pro2 Power Management Unit
2194# ichsmb	Intel ICH SMBus controller chips (82801AA, 82801AB, 82801BA)
2195# viapm		VIA VT82C586B/596B/686A and VT8233 Power Management Unit
2196# amdpm		AMD 756 Power Management Unit
2197# amdsmb	AMD 8111 SMBus 2.0 Controller
2198# nfpm		NVIDIA nForce Power Management Unit
2199# nfsmb		NVIDIA nForce2/3/4 MCP SMBus 2.0 Controller
2200# ismt		Intel SMBus 2.0 controller chips (on Atom S1200, C2000)
2201#
2202device		smbus		# Bus support, required for smb below.
2203
2204device		intpm
2205device		alpm
2206device		ichsmb
2207device		viapm
2208device		amdpm
2209device		amdsmb
2210device		nfpm
2211device		nfsmb
2212device		ismt
2213
2214device		smb
2215
2216# SMBus peripheral devices
2217#
2218# jedec_dimm	Asset and temperature reporting for DDR3 and DDR4 DIMMs
2219#
2220device		jedec_dimm
2221
2222# I2C Bus
2223#
2224# Philips i2c bus support is provided by the `iicbus' device.
2225#
2226# Supported devices:
2227# ic	i2c network interface
2228# iic	i2c standard io
2229# iicsmb i2c to smb bridge. Allow i2c i/o with smb commands.
2230# iicoc simple polling driver for OpenCores I2C controller
2231#
2232# Other:
2233# iicbb	generic I2C bit-banging code (needed by lpbb)
2234#
2235device		iicbus		# Bus support, required for ic/iic/iicsmb below.
2236device		iicbb		# bitbang driver; implements i2c on a pair of gpio pins
2237
2238device		ic
2239device		iic		# userland access to i2c slave devices via ioctl(8)
2240device		iicsmb		# smb over i2c bridge
2241device		iicoc		# OpenCores I2C controller support
2242
2243# I2C bus multiplexer (mux) devices
2244device		iicmux		# i2c mux core driver
2245device		iic_gpiomux	# i2c mux hardware controlled via gpio pins
2246device		ltc430x		# LTC4305 and LTC4306 i2c mux chips
2247
2248# I2C peripheral devices
2249#
2250device		ad7418		# Analog Devices temp and voltage sensor
2251device		ads111x		# Texas Instruments ADS101x and ADS111x ADCs
2252device		ds1307		# Dallas DS1307 RTC and compatible
2253device		ds13rtc		# All Dallas/Maxim ds13xx chips
2254device		ds1672		# Dallas DS1672 RTC
2255device		ds3231		# Dallas DS3231 RTC + temperature
2256device		fan53555	# Fairchild Semi FAN53555/SYR82x Regulator
2257device		icee		# AT24Cxxx and compatible EEPROMs
2258device		isl12xx		# Intersil ISL12xx RTC
2259device		lm75		# LM75 compatible temperature sensor
2260device		nxprtc		# NXP RTCs: PCA/PFC212x PCA/PCF85xx
2261device		rtc8583		# Epson RTC-8583
2262device		s35390a		# Seiko Instruments S-35390A RTC
2263device		sy8106a		# Silergy Corp. SY8106A buck regulator
2264
2265# Parallel-Port Bus
2266#
2267# Parallel port bus support is provided by the `ppbus' device.
2268# Multiple devices may be attached to the parallel port, devices
2269# are automatically probed and attached when found.
2270#
2271# Supported devices:
2272# lpt	Parallel Printer
2273# plip	Parallel network interface
2274# ppi	General-purpose I/O ("Geek Port") + IEEE1284 I/O
2275# pps	Pulse per second Timing Interface
2276# lpbb	Philips official parallel port I2C bit-banging interface
2277# pcfclock Parallel port clock driver.
2278#
2279# Supported interfaces:
2280# ppc	ISA-bus parallel port interfaces.
2281#
2282
2283options 	PPC_PROBE_CHIPSET # Enable chipset specific detection
2284				  # (see flags in ppc(4))
2285options 	DEBUG_1284	# IEEE1284 signaling protocol debug
2286options 	PERIPH_1284	# Makes your computer act as an IEEE1284
2287				# compliant peripheral
2288options 	DONTPROBE_1284	# Avoid boot detection of PnP parallel devices
2289options 	LPT_DEBUG	# Printer driver debug
2290options 	PPC_DEBUG	# Parallel chipset level debug
2291options 	PLIP_DEBUG	# Parallel network IP interface debug
2292options 	PCFCLOCK_VERBOSE         # Verbose pcfclock driver
2293options 	PCFCLOCK_MAX_RETRIES=5   # Maximum read tries (default 10)
2294
2295device		ppc
2296envvar		hint.ppc.0.at="isa"
2297envvar		hint.ppc.0.irq="7"
2298device		ppbus
2299device		lpt
2300device		plip
2301device		ppi
2302device		pps
2303device		lpbb
2304device		pcfclock
2305
2306# General Purpose I/O pins
2307device		dwgpio		# Synopsys DesignWare APB GPIO Controller
2308device  	gpio		# gpio interfaces and bus support
2309device  	gpiobacklight	# sysctl control of gpio-based backlight
2310device  	gpioiic		# i2c via gpio bitbang
2311device  	gpiokeys	# kbd(4) glue for gpio-based key input
2312device  	gpioled		# led(4) gpio glue
2313device  	gpiopower	# event handler for gpio-based powerdown
2314device  	gpiopps		# Pulse per second input from gpio pin
2315device  	gpioregulator	# extres/regulator glue for gpio pin
2316device  	gpiospi		# SPI via gpio bitbang
2317device  	gpioths		# 1-wire temp/humidity sensor on gpio pin
2318
2319# Pulse width modulation
2320device  	pwmbus		# pwm interface and bus support
2321device  	pwmc		# userland control access to pwm outputs
2322
2323#
2324# Etherswitch framework and drivers
2325#
2326# etherswitch	The etherswitch(4) framework
2327# miiproxy	Proxy device for miibus(4) functionality
2328#
2329# Switch hardware support:
2330# arswitch	Atheros switches
2331# ip17x 	IC+ 17x family switches
2332# rtl8366r	Realtek RTL8366 switches
2333# ukswitch	Multi-PHY switches
2334#
2335device		etherswitch
2336device		miiproxy
2337device		arswitch
2338device		ip17x
2339device		rtl8366rb
2340device		ukswitch
2341
2342# Kernel BOOTP support
2343
2344options 	BOOTP		# Use BOOTP to obtain IP address/hostname
2345				# Requires NFSCL and NFS_ROOT
2346options 	BOOTP_NFSROOT	# NFS mount root filesystem using BOOTP info
2347options 	BOOTP_NFSV3	# Use NFS v3 to NFS mount root
2348options 	BOOTP_COMPAT	# Workaround for broken bootp daemons.
2349options 	BOOTP_WIRED_TO=fxp0 # Use interface fxp0 for BOOTP
2350options 	BOOTP_BLOCKSIZE=8192 # Override NFS block size
2351
2352#
2353# Enable software watchdog routines, even if hardware watchdog is present.
2354# By default, software watchdog timer is enabled only if no hardware watchdog
2355# is present.
2356#
2357options 	SW_WATCHDOG
2358
2359#
2360# Add the software deadlock resolver thread.
2361#
2362options 	DEADLKRES
2363
2364#
2365# Disable swapping of stack pages.  This option removes all
2366# code which actually performs swapping, so it's not possible to turn
2367# it back on at run-time.
2368#
2369# This is sometimes usable for systems which don't have any swap space
2370# (see also sysctl "vm.disable_swapspace_pageouts")
2371#
2372#options 	NO_SWAPPING
2373
2374# Set the number of sf_bufs to allocate. sf_bufs are virtual buffers
2375# for sendfile(2) that are used to map file VM pages, and normally
2376# default to a quantity that is roughly 16*MAXUSERS+512. You would
2377# typically want about 4 of these for each simultaneous file send.
2378#
2379options 	NSFBUFS=1024
2380
2381#
2382# Enable extra debugging code for locks.  This stores the filename and
2383# line of whatever acquired the lock in the lock itself, and changes a
2384# number of function calls to pass around the relevant data.  This is
2385# not at all useful unless you are debugging lock code.  Note that
2386# modules should be recompiled as this option modifies KBI.
2387#
2388options 	DEBUG_LOCKS
2389
2390#####################################################################
2391# HID support
2392device		hid		# Generic HID support
2393options 	HID_DEBUG	# enable debug msgs
2394device		hidbus		# HID bus
2395device		hidmap		# HID to evdev mapping
2396device		hidraw		# Raw access driver
2397options 	HIDRAW_MAKE_UHID_ALIAS	# install /dev/uhid alias
2398device		hconf		# Multitouch configuration TLC
2399device		hcons		# Consumer controls
2400device		hgame		# Generic game controllers
2401device		hkbd		# HID keyboard
2402device		hms		# HID mouse
2403device		hmt		# HID multitouch (MS-compatible)
2404device		hpen		# Generic pen driver
2405device		hsctrl		# System controls
2406device		ps4dshock	# Sony PS4 DualShock 4 gamepad driver
2407device		xb360gp		# XBox 360 gamepad driver
2408
2409#####################################################################
2410# USB support
2411# UHCI controller
2412device		uhci
2413# OHCI controller
2414device		ohci
2415# EHCI controller
2416device		ehci
2417# XHCI controller
2418device		xhci
2419# SL811 Controller
2420#device		slhci
2421# General USB code (mandatory for USB)
2422device		usb
2423#
2424# USB Double Bulk Pipe devices
2425device		udbp
2426# USB temperature meter
2427device		ugold
2428# USB LED
2429device		uled
2430# Human Interface Device (anything with buttons and dials)
2431device		uhid
2432# USB keyboard
2433device		ukbd
2434# USB printer
2435device		ulpt
2436# USB mass storage driver (Requires scbus and da)
2437device		umass
2438# USB mass storage driver for device-side mode
2439device		usfs
2440# USB support for Belkin F5U109 and Magic Control Technology serial adapters
2441device		umct
2442# USB modem support
2443device		umodem
2444# USB mouse
2445device		ums
2446# USB touchpad(s)
2447device		atp
2448device		wsp
2449# eGalax USB touch screen
2450device		uep
2451# Diamond Rio 500 MP3 player
2452device		urio
2453# HID-over-USB driver
2454device		usbhid
2455
2456#
2457# USB serial support
2458device		ucom
2459# USB support for 3G modem cards by Option, Novatel, Huawei and Sierra
2460device		u3g
2461# USB support for Technologies ARK3116 based serial adapters
2462device		uark
2463# USB support for Belkin F5U103 and compatible serial adapters
2464device		ubsa
2465# USB support for serial adapters based on the FT8U100AX and FT8U232AM
2466device		uftdi
2467# USB support for some Windows CE based serial communication.
2468device		uipaq
2469# USB support for Prolific PL-2303 serial adapters
2470device		uplcom
2471# USB support for Silicon Laboratories CP2101/CP2102 based USB serial adapters
2472device		uslcom
2473# USB Visor and Palm devices
2474device		uvisor
2475# USB serial support for DDI pocket's PHS
2476device		uvscom
2477#
2478# USB ethernet support
2479device		uether
2480# ADMtek USB ethernet. Supports the LinkSys USB100TX,
2481# the Billionton USB100, the Melco LU-ATX, the D-Link DSB-650TX
2482# and the SMC 2202USB. Also works with the ADMtek AN986 Pegasus
2483# eval board.
2484device		aue
2485
2486# ASIX Electronics AX88172 USB 2.0 ethernet driver. Used in the
2487# LinkSys USB200M and various other adapters.
2488device		axe
2489# ASIX Electronics AX88178A/AX88179 USB 2.0/3.0 gigabit ethernet driver.
2490device		axge
2491
2492#
2493# Devices which communicate using Ethernet over USB, particularly
2494# Communication Device Class (CDC) Ethernet specification. Supports
2495# Sharp Zaurus PDAs, some DOCSIS cable modems and so on.
2496device		cdce
2497#
2498# CATC USB-EL1201A USB ethernet. Supports the CATC Netmate
2499# and Netmate II, and the Belkin F5U111.
2500device		cue
2501#
2502# Kawasaki LSI ethernet. Supports the LinkSys USB10T,
2503# Entrega USB-NET-E45, Peracom Ethernet Adapter, the
2504# 3Com 3c19250, the ADS Technologies USB-10BT, the ATen UC10T,
2505# the Netgear EA101, the D-Link DSB-650, the SMC 2102USB
2506# and 2104USB, and the Corega USB-T.
2507device		kue
2508#
2509# RealTek RTL8150 USB to fast ethernet. Supports the Melco LUA-KTX
2510# and the GREEN HOUSE GH-USB100B.
2511device		rue
2512#
2513# Davicom DM9601E USB to fast ethernet. Supports the Corega FEther USB-TXC.
2514device		udav
2515#
2516# RealTek RTL8152/RTL8153 USB Ethernet driver
2517device		ure
2518#
2519# Moschip MCS7730/MCS7840 USB to fast ethernet. Supports the Sitecom LN030.
2520device		mos
2521#
2522# HSxPA devices from Option N.V
2523device		uhso
2524
2525# Realtek RTL8188SU/RTL8191SU/RTL8192SU wireless driver
2526device		rsu
2527#
2528# Ralink Technology RT2501USB/RT2601USB wireless driver
2529device		rum
2530# Ralink Technology RT2700U/RT2800U/RT3000U wireless driver
2531device		run
2532#
2533# Atheros AR5523 wireless driver
2534device		uath
2535#
2536# Conexant/Intersil PrismGT wireless driver
2537device		upgt
2538#
2539# Ralink Technology RT2500USB wireless driver
2540device		ural
2541#
2542# RNDIS USB ethernet driver
2543device		urndis
2544# Realtek RTL8187B/L wireless driver
2545device		urtw
2546#
2547# ZyDas ZD1211/ZD1211B wireless driver
2548device		zyd
2549#
2550# Sierra USB wireless driver
2551device		usie
2552
2553#
2554# debugging options for the USB subsystem
2555#
2556options 	USB_DEBUG
2557options 	U3G_DEBUG
2558
2559# options for ukbd:
2560options 	UKBD_DFLT_KEYMAP	# specify the built-in keymap
2561makeoptions	UKBD_DFLT_KEYMAP=jp.106
2562
2563# options for uplcom:
2564options 	UPLCOM_INTR_INTERVAL=100	# interrupt pipe interval
2565						# in milliseconds
2566
2567# options for uvscom:
2568options 	UVSCOM_DEFAULT_OPKTSIZE=8	# default output packet size
2569options 	UVSCOM_INTR_INTERVAL=100	# interrupt pipe interval
2570						# in milliseconds
2571
2572#####################################################################
2573# FireWire support
2574
2575device		firewire	# FireWire bus code
2576device		sbp		# SCSI over Firewire (Requires scbus and da)
2577device		sbp_targ	# SBP-2 Target mode  (Requires scbus and targ)
2578device		fwe		# Ethernet over FireWire (non-standard!)
2579device		fwip		# IP over FireWire (RFC2734 and RFC3146)
2580
2581#####################################################################
2582# dcons support (Dumb Console Device)
2583
2584device		dcons			# dumb console driver
2585device		dcons_crom		# FireWire attachment
2586options 	DCONS_BUF_SIZE=16384	# buffer size
2587options 	DCONS_POLL_HZ=100	# polling rate
2588options 	DCONS_FORCE_CONSOLE=0	# force to be the primary console
2589options 	DCONS_FORCE_GDB=1	# force to be the gdb device
2590
2591#####################################################################
2592# crypto subsystem
2593#
2594# This is a port of the OpenBSD crypto framework.  Include this when
2595# configuring IPSEC and when you have a h/w crypto device to accelerate
2596# user applications that link to OpenSSL.
2597#
2598# Drivers are ports from OpenBSD with some simple enhancements that have
2599# been fed back to OpenBSD.
2600
2601device		crypto		# core crypto support
2602
2603# Only install the cryptodev device if you are running tests, or know
2604# specifically why you need it.  In most cases, it is not needed and
2605# will make things slower.
2606device		cryptodev	# /dev/crypto for access to h/w
2607
2608device		rndtest		# FIPS 140-2 entropy tester
2609
2610device		ccr		# Chelsio T6
2611
2612device		hifn		# Hifn 7951, 7781, etc.
2613options 	HIFN_DEBUG	# enable debugging support: hw.hifn.debug
2614options 	HIFN_RNDTEST	# enable rndtest support
2615
2616#####################################################################
2617
2618
2619#
2620# Embedded system options:
2621#
2622# An embedded system might want to run something other than init.
2623options 	INIT_PATH=/sbin/init:/rescue/init
2624
2625# Debug options
2626options 	BUS_DEBUG	# enable newbus debugging
2627options 	DEBUG_VFS_LOCKS	# enable VFS lock debugging
2628options 	SOCKBUF_DEBUG	# enable sockbuf last record/mb tail checking
2629options 	IFMEDIA_DEBUG	# enable debugging in net/if_media.c
2630
2631#
2632# Verbose SYSINIT
2633#
2634# Make the SYSINIT process performed by mi_startup() verbose.  This is very
2635# useful when porting to a new architecture.  If DDB is also enabled, this
2636# will print function names instead of addresses.  If defined with a value
2637# of zero, the verbose code is compiled-in but disabled by default, and can
2638# be enabled with the debug.verbose_sysinit=1 tunable.
2639options 	VERBOSE_SYSINIT
2640
2641#####################################################################
2642# SYSV IPC KERNEL PARAMETERS
2643#
2644# Maximum number of System V semaphores that can be used on the system at
2645# one time.
2646options 	SEMMNI=11
2647
2648# Total number of semaphores system wide
2649options 	SEMMNS=61
2650
2651# Total number of undo structures in system
2652options 	SEMMNU=31
2653
2654# Maximum number of System V semaphores that can be used by a single process
2655# at one time.
2656options 	SEMMSL=61
2657
2658# Maximum number of operations that can be outstanding on a single System V
2659# semaphore at one time.
2660options 	SEMOPM=101
2661
2662# Maximum number of undo operations that can be outstanding on a single
2663# System V semaphore at one time.
2664options 	SEMUME=11
2665
2666# Maximum number of shared memory pages system wide.
2667options 	SHMALL=1025
2668
2669# Maximum size, in bytes, of a single System V shared memory region.
2670options 	SHMMAX=(SHMMAXPGS*PAGE_SIZE+1)
2671options 	SHMMAXPGS=1025
2672
2673# Minimum size, in bytes, of a single System V shared memory region.
2674options 	SHMMIN=2
2675
2676# Maximum number of shared memory regions that can be used on the system
2677# at one time.
2678options 	SHMMNI=33
2679
2680# Maximum number of System V shared memory regions that can be attached to
2681# a single process at one time.
2682options 	SHMSEG=9
2683
2684# Set the amount of time (in seconds) the system will wait before
2685# rebooting automatically when a kernel panic occurs.  If set to (-1),
2686# the system will wait indefinitely until a key is pressed on the
2687# console.
2688options 	PANIC_REBOOT_WAIT_TIME=16
2689
2690# Attempt to bypass the buffer cache and put data directly into the
2691# userland buffer for read operation when O_DIRECT flag is set on the
2692# file.  Both offset and length of the read operation must be
2693# multiples of the physical media sector size.
2694#
2695options 	DIRECTIO
2696
2697# Specify a lower limit for the number of swap I/O buffers.  They are
2698# (among other things) used when bypassing the buffer cache due to
2699# DIRECTIO kernel option enabled and O_DIRECT flag set on file.
2700#
2701options 	NSWBUF_MIN=120
2702
2703#####################################################################
2704
2705# More undocumented options for linting.
2706# Note that documenting these is not considered an affront.
2707
2708options 	CAM_DEBUG_DELAY
2709
2710options 	DEBUG
2711
2712# Kernel filelock debugging.
2713options 	LOCKF_DEBUG
2714
2715# System V compatible message queues
2716# Please note that the values provided here are used to test kernel
2717# building.  The defaults in the sources provide almost the same numbers.
2718# MSGSSZ must be a power of 2 between 8 and 1024.
2719options 	MSGMNB=2049	# Max number of chars in queue
2720options 	MSGMNI=41	# Max number of message queue identifiers
2721options 	MSGSEG=2049	# Max number of message segments
2722options 	MSGSSZ=16	# Size of a message segment
2723options 	MSGTQL=41	# Max number of messages in system
2724
2725options 	NBUF=512	# Number of buffer headers
2726
2727options 	SC_DEBUG_LEVEL=5	# Syscons debug level
2728options 	SC_RENDER_DEBUG	# syscons rendering debugging
2729
2730options 	VFS_BIO_DEBUG	# VFS buffer I/O debugging
2731
2732options 	KSTACK_MAX_PAGES=32 # Maximum pages to give the kernel stack
2733options 	KSTACK_USAGE_PROF
2734
2735# Adaptec Array Controller driver options
2736options 	AAC_DEBUG	# Debugging levels:
2737				# 0 - quiet, only emit warnings
2738				# 1 - noisy, emit major function
2739				#     points and things done
2740				# 2 - extremely noisy, emit trace
2741				#     items in loops, etc.
2742
2743# Resource Accounting
2744options 	RACCT
2745
2746# Resource Limits
2747options 	RCTL
2748
2749# Yet more undocumented options for linting.
2750options 	MAXFILES=999
2751
2752# Random number generator
2753# Alternative algorithm.
2754#options 	RANDOM_FENESTRASX
2755# Allow the CSPRNG algorithm to be loaded as a module.
2756#options 	RANDOM_LOADABLE
2757# Select this to allow high-rate but potentially expensive
2758# harvesting of Slab-Allocator entropy. In very high-rate
2759# situations the value of doing this is dubious at best.
2760options 	RANDOM_ENABLE_UMA	# slab allocator
2761
2762# Select this to allow high-rate but potentially expensive
2763# harvesting of of the m_next pointer in the mbuf. Note that
2764# the m_next pointer is NULL except when receiving > 4K
2765# jumbo frames or sustained bursts by way of LRO. Thus in
2766# the common case it is stirring zero in to the entropy
2767# pool. In cases where it is not NULL it is pointing to one
2768# of a small (in the thousands to 10s of thousands) number
2769# of 256 byte aligned mbufs. Hence it is, even in the best
2770# case, a poor source of entropy. And in the absence of actual
2771# runtime analysis of entropy collection may mislead the user in
2772# to believe that substantially more entropy is being collected
2773# than in fact is - leading to a different class of security
2774# risk. In high packet rate situations ethernet entropy
2775# collection is also very expensive, possibly leading to as
2776# much as a 50% drop in packets received.
2777# This option is present to maintain backwards compatibility
2778# if desired, however it cannot be recommended for use in any
2779# environment.
2780options 	RANDOM_ENABLE_ETHER	# ether_input
2781
2782# Module to enable execution of application via emulators like QEMU
2783options         IMGACT_BINMISC
2784
2785# zlib I/O stream support
2786# This enables support for compressed core dumps.
2787options 	GZIO
2788
2789# zstd support
2790# This enables support for Zstd compressed core dumps, GEOM_UZIP images,
2791# and is required by zfs if statically linked.
2792options 	ZSTDIO
2793
2794# BHND(4) drivers
2795options 	BHND_LOGLEVEL	# Logging threshold level
2796
2797# evdev interface
2798device		evdev		# input event device support
2799options 	EVDEV_SUPPORT	# evdev support in legacy drivers
2800options 	EVDEV_DEBUG	# enable event debug msgs
2801device		uinput		# install /dev/uinput cdev
2802options 	UINPUT_DEBUG	# enable uinput debug msgs
2803
2804# Encrypted kernel crash dumps.
2805options 	EKCD
2806
2807# Serial Peripheral Interface (SPI) support.
2808device		spibus		# Bus support.
2809device		at45d		# DataFlash driver
2810device		cqspi		#
2811device		mx25l		# SPIFlash driver
2812device		n25q		#
2813device		spigen		# Generic access to SPI devices from userland.
2814# Enable legacy /dev/spigenN name aliases for /dev/spigenX.Y devices.
2815options 	SPIGEN_LEGACY_CDEVNAME # legacy device names for spigen
2816
2817# Compression supports.
2818device		zlib		# gzip/zlib compression/decompression library
2819device		xz		# xz_embedded LZMA de-compression library
2820
2821# Kernel support for stats(3).
2822options 	STATS
2823