xref: /freebsd/sys/conf/NOTES (revision dd3603749cb7f20a628f04d595b105962b21a3d2)
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_CACHE		# Disk cache.
158options 	GEOM_CONCAT		# Disk concatenation.
159options 	GEOM_ELI		# Disk encryption.
160options 	GEOM_GATE		# Userland services.
161options 	GEOM_JOURNAL		# Journaling.
162options 	GEOM_LABEL		# Providers labelization.
163options 	GEOM_LINUX_LVM		# Linux LVM2 volumes
164options 	GEOM_MAP		# Map based partitioning
165options 	GEOM_MIRROR		# Disk mirroring.
166options 	GEOM_MULTIPATH		# Disk multipath
167options 	GEOM_NOP		# Test class.
168options 	GEOM_PART_APM		# Apple partitioning
169options 	GEOM_PART_BSD		# BSD disklabel
170options 	GEOM_PART_BSD64		# BSD disklabel64
171options 	GEOM_PART_EBR		# Extended Boot Records
172options 	GEOM_PART_GPT		# GPT partitioning
173options 	GEOM_PART_LDM		# Logical Disk Manager
174options 	GEOM_PART_MBR		# MBR partitioning
175options 	GEOM_RAID		# Soft RAID functionality.
176options 	GEOM_RAID3		# RAID3 functionality.
177options 	GEOM_SHSEC		# Shared secret.
178options 	GEOM_STRIPE		# Disk striping.
179options 	GEOM_UZIP		# Read-only compressed disks
180options 	GEOM_VIRSTOR		# Virtual storage.
181options 	GEOM_ZERO		# Performance testing helper.
182
183#
184# The root device and filesystem type can be compiled in;
185# this provides a fallback option if the root device cannot
186# be correctly guessed by the bootstrap code, or an override if
187# the RB_DFLTROOT flag (-r) is specified when booting the kernel.
188#
189options 	ROOTDEVNAME=\"ufs:da0s2e\"
190
191
192#####################################################################
193# Scheduler options:
194#
195# Specifying one of SCHED_4BSD or SCHED_ULE is mandatory.  These options
196# select which scheduler is compiled in.
197#
198# SCHED_4BSD is the historical, proven, BSD scheduler.  It has a global run
199# queue and no CPU affinity which makes it suboptimal for SMP.  It has very
200# good interactivity and priority selection.
201#
202# SCHED_ULE provides significant performance advantages over 4BSD on many
203# workloads on SMP machines.  It supports cpu-affinity, per-cpu runqueues
204# and scheduler locks.  It also has a stronger notion of interactivity
205# which leads to better responsiveness even on uniprocessor machines.  This
206# is the default scheduler.
207#
208# SCHED_STATS is a debugging option which keeps some stats in the sysctl
209# tree at 'kern.sched.stats' and is useful for debugging scheduling decisions.
210#
211options 	SCHED_4BSD
212options 	SCHED_STATS
213#options 	SCHED_ULE
214
215#####################################################################
216# SMP OPTIONS:
217#
218# SMP enables building of a Symmetric MultiProcessor Kernel.
219
220# Mandatory:
221options 	SMP			# Symmetric MultiProcessor Kernel
222
223# EARLY_AP_STARTUP releases the Application Processors earlier in the
224# kernel startup process (before devices are probed) rather than at the
225# end.  This is a temporary option for use during the transition from
226# late to early AP startup.
227options 	EARLY_AP_STARTUP
228
229# MAXCPU defines the maximum number of CPUs that can boot in the system.
230# A default value should be already present, for every architecture.
231options 	MAXCPU=32
232
233# NUMA enables use of Non-Uniform Memory Access policies in various kernel
234# subsystems.
235options 	NUMA
236
237# MAXMEMDOM defines the maximum number of memory domains that can boot in the
238# system.  A default value should already be defined by every architecture.
239options 	MAXMEMDOM=2
240
241# ADAPTIVE_MUTEXES changes the behavior of blocking mutexes to spin
242# if the thread that currently owns the mutex is executing on another
243# CPU.  This behavior is enabled by default, so this option can be used
244# to disable it.
245options 	NO_ADAPTIVE_MUTEXES
246
247# ADAPTIVE_RWLOCKS changes the behavior of reader/writer locks to spin
248# if the thread that currently owns the rwlock is executing on another
249# CPU.  This behavior is enabled by default, so this option can be used
250# to disable it.
251options 	NO_ADAPTIVE_RWLOCKS
252
253# ADAPTIVE_SX changes the behavior of sx locks to spin if the thread that
254# currently owns the sx lock is executing on another CPU.
255# This behavior is enabled by default, so this option can be used to
256# disable it.
257options 	NO_ADAPTIVE_SX
258
259# MUTEX_NOINLINE forces mutex operations to call functions to perform each
260# operation rather than inlining the simple cases.  This can be used to
261# shrink the size of the kernel text segment.  Note that this behavior is
262# already implied by the INVARIANT_SUPPORT, INVARIANTS, KTR, LOCK_PROFILING,
263# and WITNESS options.
264options 	MUTEX_NOINLINE
265
266# RWLOCK_NOINLINE forces rwlock operations to call functions to perform each
267# operation rather than inlining the simple cases.  This can be used to
268# shrink the size of the kernel text segment.  Note that this behavior is
269# already implied by the INVARIANT_SUPPORT, INVARIANTS, KTR, LOCK_PROFILING,
270# and WITNESS options.
271options 	RWLOCK_NOINLINE
272
273# SX_NOINLINE forces sx lock operations to call functions to perform each
274# operation rather than inlining the simple cases.  This can be used to
275# shrink the size of the kernel text segment.  Note that this behavior is
276# already implied by the INVARIANT_SUPPORT, INVARIANTS, KTR, LOCK_PROFILING,
277# and WITNESS options.
278options 	SX_NOINLINE
279
280# SMP Debugging Options:
281#
282# CALLOUT_PROFILING enables rudimentary profiling of the callwheel data
283#	  structure used as backend in callout(9).
284# PREEMPTION allows the threads that are in the kernel to be preempted by
285#	  higher priority [interrupt] threads.  It helps with interactivity
286#	  and allows interrupt threads to run sooner rather than waiting.
287# FULL_PREEMPTION instructs the kernel to preempt non-realtime kernel
288#	  threads.  Its sole use is to expose race conditions and other
289#	  bugs during development.  Enabling this option will reduce
290#	  performance and increase the frequency of kernel panics by
291#	  design.  If you aren't sure that you need it then you don't.
292#	  Relies on the PREEMPTION option.  DON'T TURN THIS ON.
293# SLEEPQUEUE_PROFILING enables rudimentary profiling of the hash table
294#	  used to hold active sleep queues as well as sleep wait message
295#	  frequency.
296# TURNSTILE_PROFILING enables rudimentary profiling of the hash table
297#	  used to hold active lock queues.
298# UMTX_PROFILING enables rudimentary profiling of the hash table used
299#	  to hold active lock queues.
300# WITNESS enables the witness code which detects deadlocks and cycles
301#         during locking operations.
302# WITNESS_KDB causes the witness code to drop into the kernel debugger if
303#	  a lock hierarchy violation occurs or if locks are held when going to
304#	  sleep.
305# WITNESS_SKIPSPIN disables the witness checks on spin mutexes.
306options 	PREEMPTION
307options 	FULL_PREEMPTION
308options 	WITNESS
309options 	WITNESS_KDB
310options 	WITNESS_SKIPSPIN
311
312# LOCK_PROFILING - Profiling locks.  See LOCK_PROFILING(9) for details.
313options 	LOCK_PROFILING
314# Set the number of buffers and the hash size.  The hash size MUST be larger
315# than the number of buffers.  Hash size should be prime.
316options 	MPROF_BUFFERS="1536"
317options 	MPROF_HASH_SIZE="1543"
318
319# Profiling for the callout(9) backend.
320options 	CALLOUT_PROFILING
321
322# Profiling for internal hash tables.
323options 	SLEEPQUEUE_PROFILING
324options 	TURNSTILE_PROFILING
325options 	UMTX_PROFILING
326
327# Debugging traces for epoch(9) misuse
328options 	EPOCH_TRACE
329
330#####################################################################
331# COMPATIBILITY OPTIONS
332
333# Old tty interface.
334options 	COMPAT_43TTY
335
336# Note that as a general rule, COMPAT_FREEBSD<n> depends on
337# COMPAT_FREEBSD<n+1>, COMPAT_FREEBSD<n+2>, etc.
338
339# Enable FreeBSD4 compatibility syscalls
340options 	COMPAT_FREEBSD4
341
342# Enable FreeBSD5 compatibility syscalls
343options 	COMPAT_FREEBSD5
344
345# Enable FreeBSD6 compatibility syscalls
346options 	COMPAT_FREEBSD6
347
348# Enable FreeBSD7 compatibility syscalls
349options 	COMPAT_FREEBSD7
350
351# Enable FreeBSD9 compatibility syscalls
352options 	COMPAT_FREEBSD9
353
354# Enable FreeBSD10 compatibility syscalls
355options 	COMPAT_FREEBSD10
356
357# Enable FreeBSD11 compatibility syscalls
358options 	COMPAT_FREEBSD11
359
360# Enable FreeBSD12 compatibility syscalls
361options 	COMPAT_FREEBSD12
362
363# Enable FreeBSD13 compatibility syscalls
364options 	COMPAT_FREEBSD13
365
366# Enable FreeBSD14 compatibility syscalls
367options 	COMPAT_FREEBSD14
368
369# Enable Linux Kernel Programming Interface
370options 	COMPAT_LINUXKPI
371
372#
373# These three options provide support for System V Interface
374# Definition-style interprocess communication, in the form of shared
375# memory, semaphores, and message queues, respectively.
376#
377options 	SYSVSHM
378options 	SYSVSEM
379options 	SYSVMSG
380
381
382#####################################################################
383# DEBUGGING OPTIONS
384
385#
386# Compile with kernel debugger related code.
387#
388options 	KDB
389
390#
391# Print a stack trace of the current thread on the console for a panic.
392#
393options 	KDB_TRACE
394
395#
396# Don't enter the debugger for a panic. Intended for unattended operation
397# where you may want to enter the debugger from the console, but still want
398# the machine to recover from a panic.
399#
400options 	KDB_UNATTENDED
401
402#
403# Enable the ddb debugger backend.
404#
405options 	DDB
406
407#
408# Print the numerical value of symbols in addition to the symbolic
409# representation.
410#
411options 	DDB_NUMSYM
412
413#
414# Enable the remote gdb debugger backend.
415#
416options 	GDB
417
418#
419# Trashes list pointers when they become invalid (i.e., the element is
420# removed from a list).  Relatively inexpensive to enable.
421#
422options 	QUEUE_MACRO_DEBUG_TRASH
423
424#
425# Stores information about the last caller to modify the list object
426# in the list object.  Requires additional memory overhead.
427#
428#options 	QUEUE_MACRO_DEBUG_TRACE
429
430#
431# SYSCTL_DEBUG enables a 'sysctl' debug tree that can be used to dump the
432# contents of the registered sysctl nodes on the console.  It is disabled by
433# default because it generates excessively verbose console output that can
434# interfere with serial console operation.
435#
436options 	SYSCTL_DEBUG
437
438#
439# Enable textdump by default, this disables kernel core dumps.
440#
441options 	TEXTDUMP_PREFERRED
442
443#
444# Enable extra debug messages while performing textdumps.
445#
446options 	TEXTDUMP_VERBOSE
447
448#
449# NO_SYSCTL_DESCR omits the sysctl node descriptions to save space in the
450# resulting kernel.
451options 	NO_SYSCTL_DESCR
452
453#
454# MALLOC_DEBUG_MAXZONES enables multiple uma zones for malloc(9)
455# allocations that are smaller than a page.  The purpose is to isolate
456# different malloc types into hash classes, so that any buffer
457# overruns or use-after-free will usually only affect memory from
458# malloc types in that hash class.  This is purely a debugging tool;
459# by varying the hash function and tracking which hash class was
460# corrupted, the intersection of the hash classes from each instance
461# will point to a single malloc type that is being misused.  At this
462# point inspection or memguard(9) can be used to catch the offending
463# code.
464#
465options 	MALLOC_DEBUG_MAXZONES=8
466
467#
468# DEBUG_MEMGUARD builds and enables memguard(9), a replacement allocator
469# for the kernel used to detect modify-after-free scenarios.  See the
470# memguard(9) man page for more information on usage.
471#
472options 	DEBUG_MEMGUARD
473
474#
475# DEBUG_REDZONE enables buffer underflows and buffer overflows detection for
476# malloc(9).
477#
478options 	DEBUG_REDZONE
479
480#
481# EARLY_PRINTF enables support for calling a special printf (eprintf)
482# very early in the kernel (before cn_init() has been called).  This
483# should only be used for debugging purposes early in boot.  Normally,
484# it is not defined.  It is commented out here because this feature
485# isn't generally available. And the required eputc() isn't defined.
486#
487#options 	EARLY_PRINTF
488
489#
490# KTRACE enables the system-call tracing facility ktrace(2).  To be more
491# SMP-friendly, KTRACE uses a worker thread to process most trace events
492# asynchronously to the thread generating the event.  This requires a
493# pre-allocated store of objects representing trace events.  The
494# KTRACE_REQUEST_POOL option specifies the initial size of this store.
495# The size of the pool can be adjusted both at boottime and runtime via
496# the kern.ktrace_request_pool tunable and sysctl.
497#
498options 	KTRACE			#kernel tracing
499options 	KTRACE_REQUEST_POOL=101
500
501#
502# KTR is a kernel tracing facility imported from BSD/OS.  It is
503# enabled with the KTR option.  KTR_ENTRIES defines the number of
504# entries in the circular trace buffer; it may be an arbitrary number.
505# KTR_BOOT_ENTRIES defines the number of entries during the early boot,
506# before malloc(9) is functional.
507# KTR_COMPILE defines the mask of events to compile into the kernel as
508# defined by the KTR_* constants in <sys/ktr.h>.  KTR_MASK defines the
509# initial value of the ktr_mask variable which determines at runtime
510# what events to trace.  KTR_CPUMASK determines which CPU's log
511# events, with bit X corresponding to CPU X.  The layout of the string
512# passed as KTR_CPUMASK must match a series of bitmasks each of them
513# separated by the "," character (ie:
514# KTR_CPUMASK=0xAF,0xFFFFFFFFFFFFFFFF).  KTR_VERBOSE enables
515# dumping of KTR events to the console by default.  This functionality
516# can be toggled via the debug.ktr_verbose sysctl and defaults to off
517# if KTR_VERBOSE is not defined.  See ktr(4) and ktrdump(8) for details.
518#
519options 	KTR
520options 	KTR_BOOT_ENTRIES=1024
521options 	KTR_ENTRIES=(128*1024)
522options 	KTR_COMPILE=(KTR_ALL)
523options 	KTR_MASK=KTR_INTR
524options 	KTR_CPUMASK=0x3
525options 	KTR_VERBOSE
526
527#
528# ALQ(9) is a facility for the asynchronous queuing of records from the kernel
529# to a vnode, and is employed by services such as ktr(4) to produce trace
530# files based on a kernel event stream.  Records are written asynchronously
531# in a worker thread.
532#
533options 	ALQ
534options 	KTR_ALQ
535
536#
537# The INVARIANTS option is used in a number of source files to enable
538# extra sanity checking of internal structures.  This support is not
539# enabled by default because of the extra time it would take to check
540# for these conditions, which can only occur as a result of
541# programming errors.
542#
543options 	INVARIANTS
544
545#
546# The INVARIANT_SUPPORT option makes us compile in support for
547# verifying some of the internal structures.  It is a prerequisite for
548# 'INVARIANTS', as enabling 'INVARIANTS' will make these functions be
549# called.  The intent is that you can set 'INVARIANTS' for single
550# source files (by changing the source file or specifying it on the
551# command line) if you have 'INVARIANT_SUPPORT' enabled.  Also, if you
552# wish to build a kernel module with 'INVARIANTS', then adding
553# 'INVARIANT_SUPPORT' to your kernel will provide all the necessary
554# infrastructure without the added overhead.
555#
556options 	INVARIANT_SUPPORT
557
558#
559# The KASSERT_PANIC_OPTIONAL option allows kasserts to fire without
560# necessarily inducing a panic.  Panic is the default behavior, but
561# runtime options can configure it either entirely off, or off with a
562# limit.
563#
564options 	KASSERT_PANIC_OPTIONAL
565
566#
567# The DIAGNOSTIC option is used to enable extra debugging information
568# and invariants checking.  The added checks are too expensive or noisy
569# for an INVARIANTS kernel and thus are disabled by default.  It is
570# expected that a kernel configured with DIAGNOSTIC will also have the
571# INVARIANTS option enabled.
572#
573options 	DIAGNOSTIC
574
575#
576# REGRESSION causes optional kernel interfaces necessary only for regression
577# testing to be enabled.  These interfaces may constitute security risks
578# when enabled, as they permit processes to easily modify aspects of the
579# run-time environment to reproduce unlikely or unusual (possibly normally
580# impossible) scenarios.
581#
582options 	REGRESSION
583
584#
585# This option lets some drivers co-exist that can't co-exist in a running
586# system.  This is used to be able to compile all kernel code in one go for
587# quality assurance purposes (like this file, which the option takes it name
588# from.)
589#
590options 	COMPILING_LINT
591
592#
593# STACK enables the stack(9) facility, allowing the capture of kernel stack
594# for the purpose of procinfo(1), etc.  stack(9) will also be compiled in
595# automatically if DDB(4) is compiled into the kernel.
596#
597options 	STACK
598
599#
600# The NUM_CORE_FILES option specifies the limit for the number of core
601# files generated by a particular process, when the core file format
602# specifier includes the %I pattern. Since we only have 1 character for
603# the core count in the format string, meaning the range will be 0-9, the
604# maximum value allowed for this option is 10.
605# This core file limit can be adjusted at runtime via the debug.ncores
606# sysctl.
607#
608options 	NUM_CORE_FILES=5
609
610#
611# The TSLOG option enables timestamped logging of events, especially
612# function entries/exits, in order to track the time spent by the kernel.
613# In particular, this is useful when investigating the early boot process,
614# before it is possible to use more sophisticated tools like DTrace.
615# The TSLOGSIZE option controls the size of the (preallocated, fixed
616# length) buffer used for storing these events (default: 262144 records).
617# The TSLOG_PAGEZERO option enables TSLOG of pmap_zero_page; this must be
618# enabled separately since it typically generates too many records to be
619# useful.
620#
621# For security reasons the TSLOG option should not be enabled on systems
622# used in production.
623#
624options 	TSLOG
625options 	TSLOGSIZE=262144
626
627
628#####################################################################
629# PERFORMANCE MONITORING OPTIONS
630
631#
632# The hwpmc driver that allows the use of in-CPU performance monitoring
633# counters for performance monitoring.  The base kernel needs to be configured
634# with the 'options' line, while the hwpmc device can be either compiled
635# in or loaded as a loadable kernel module.
636#
637# Additional configuration options may be required on specific architectures,
638# please see hwpmc(4).
639
640device		hwpmc			# Driver (also a loadable module)
641options 	HWPMC_DEBUG
642options 	HWPMC_HOOKS		# Other necessary kernel hooks
643
644
645#####################################################################
646# NETWORKING OPTIONS
647
648#
649# Protocol families
650#
651options 	INET			#Internet communications protocols
652options 	INET6			#IPv6 communications protocols
653#
654# Note if you include INET/INET6 or both options
655# You *must* define at least one of the congestion control
656# options or the compile will fail. GENERIC defines
657# options CC_CUBIC. You may want to specify a default
658# if multiple congestion controls are compiled in.
659# The string in default is the name of the
660# cc module as it would appear in the sysctl for
661# setting the default. The code defines CUBIC
662# as default, or the sole cc_module compiled in.
663#
664options 	CC_CDG
665options 	CC_CHD
666options 	CC_CUBIC
667options 	CC_DCTCP
668options 	CC_HD
669options 	CC_HTCP
670options 	CC_NEWRENO
671options 	CC_VEGAS
672options 	CC_DEFAULT=\"cubic\"
673options 	RATELIMIT		# TX rate limiting support
674
675options 	ROUTETABLES=2		# allocated fibs up to 65536. default is 1.
676					# but that would be a bad idea as they are large.
677
678options 	TCP_OFFLOAD		# TCP offload support.
679options  	TCP_RFC7413		# TCP Fast Open
680
681options  	TCPHPTS
682
683# In order to enable IPSEC you MUST also add device crypto to
684# your kernel configuration
685options 	IPSEC			#IP security (requires device crypto)
686
687# Option IPSEC_SUPPORT does not enable IPsec, but makes it possible to
688# load it as a kernel module. You still MUST add device crypto to your kernel
689# configuration.
690options 	IPSEC_SUPPORT
691#options 	IPSEC_DEBUG		#debug for IP security
692
693# Alternative TCP stacks
694options 	TCP_BBR
695options 	TCP_RACK
696
697# TLS framing and encryption/decryption of data over TCP sockets.
698options 	KERN_TLS		# TLS transmit and receive offload
699
700# Netlink kernel/user<>kernel/user messaging interface
701options 	NETLINK
702
703#
704# SMB/CIFS requester
705# NETSMB enables support for SMB protocol, it requires LIBMCHAIN and LIBICONV
706# options.
707options 	NETSMB			#SMB/CIFS requester
708
709# mchain library. It can be either loaded as KLD or compiled into kernel
710options 	LIBMCHAIN
711
712# libalias library, performing NAT
713options 	LIBALIAS
714
715#
716# SCTP is a NEW transport protocol defined by
717# RFC2960 updated by RFC3309 and RFC3758.. and
718# soon to have a new base RFC and many many more
719# extensions. This release supports all the extensions
720# including many drafts (most about to become RFC's).
721# It is the reference implementation of SCTP
722# and is quite well tested.
723#
724# Note YOU MUST have both INET and INET6 defined.
725# You don't have to enable V6, but SCTP is
726# dual stacked and so far we have not torn apart
727# the V6 and V4.. since an association can span
728# both a V6 and V4 address at the SAME time :-)
729#
730# The SCTP_SUPPORT option does not enable SCTP, but provides the necessary
731# support for loading SCTP as a loadable kernel module.
732#
733options 	SCTP
734options 	SCTP_SUPPORT
735
736# There are bunches of options:
737# this one turns on all sorts of
738# nastily printing that you can
739# do. It's all controlled by a
740# bit mask (settable by socket opt and
741# by sysctl). Including will not cause
742# logging until you set the bits.. but it
743# can be quite verbose.. so without this
744# option we don't do any of the tests for
745# bits and prints.. which makes the code run
746# faster.. if you are not debugging don't use.
747options 	SCTP_DEBUG
748
749#
750# All that options after that turn on specific types of
751# logging. You can monitor CWND growth, flight size
752# and all sorts of things. Go look at the code and
753# see. I have used this to produce interesting
754# charts and graphs as well :->
755#
756# I have not yet committed the tools to get and print
757# the logs, I will do that eventually .. before then
758# if you want them send me an email rrs@freebsd.org
759# You basically must have ktr(4) enabled for these
760# and you then set the sysctl to turn on/off various
761# logging bits. Use ktrdump(8) to pull the log and run
762# it through a display program.. and graphs and other
763# things too.
764#
765options 	SCTP_LOCK_LOGGING
766options 	SCTP_MBUF_LOGGING
767options 	SCTP_MBCNT_LOGGING
768options 	SCTP_PACKET_LOGGING
769options 	SCTP_LTRACE_CHUNKS
770options 	SCTP_LTRACE_ERRORS
771
772# OpenFabrics Enterprise Distribution (Infiniband).
773options 	OFED
774options 	OFED_DEBUG_INIT
775
776# Sockets Direct Protocol
777options 	SDP
778options 	SDP_DEBUG
779
780# IP over Infiniband
781options 	IPOIB
782options 	IPOIB_DEBUG
783options 	IPOIB_CM
784
785# altq(9). Enable the base part of the hooks with the ALTQ option.
786# Individual disciplines must be built into the base system and can not be
787# loaded as modules at this point. ALTQ requires a stable TSC so if yours is
788# broken or changes with CPU throttling then you must also have the ALTQ_NOPCC
789# option.
790options 	ALTQ
791options 	ALTQ_CBQ	# Class Based Queueing
792options 	ALTQ_RED	# Random Early Detection
793options 	ALTQ_RIO	# RED In/Out
794options 	ALTQ_CODEL	# CoDel Active Queueing
795options 	ALTQ_HFSC	# Hierarchical Packet Scheduler
796options 	ALTQ_FAIRQ	# Fair Packet Scheduler
797options 	ALTQ_CDNR	# Traffic conditioner
798options 	ALTQ_PRIQ	# Priority Queueing
799options 	ALTQ_NOPCC	# Required if the TSC is unusable
800options 	ALTQ_DEBUG
801
802# netgraph(4). Enable the base netgraph code with the NETGRAPH option.
803# Individual node types can be enabled with the corresponding option
804# listed below; however, this is not strictly necessary as netgraph
805# will automatically load the corresponding KLD module if the node type
806# is not already compiled into the kernel. Each type below has a
807# corresponding man page, e.g., ng_async(8).
808options 	NETGRAPH		# netgraph(4) system
809options 	NETGRAPH_DEBUG		# enable extra debugging, this
810					# affects netgraph(4) and nodes
811# Node types
812options 	NETGRAPH_ASYNC
813options 	NETGRAPH_BLUETOOTH		# ng_bluetooth(4)
814options 	NETGRAPH_BLUETOOTH_HCI		# ng_hci(4)
815options 	NETGRAPH_BLUETOOTH_L2CAP	# ng_l2cap(4)
816options 	NETGRAPH_BLUETOOTH_SOCKET	# ng_btsocket(4)
817options 	NETGRAPH_BLUETOOTH_UBT		# ng_ubt(4)
818options 	NETGRAPH_BLUETOOTH_UBTBCMFW	# ubtbcmfw(4)
819options 	NETGRAPH_BPF
820options 	NETGRAPH_BRIDGE
821options 	NETGRAPH_CAR
822options 	NETGRAPH_CHECKSUM
823options 	NETGRAPH_CISCO
824options 	NETGRAPH_DEFLATE
825options 	NETGRAPH_DEVICE
826options 	NETGRAPH_ECHO
827options 	NETGRAPH_EIFACE
828options 	NETGRAPH_ETHER
829options 	NETGRAPH_FRAME_RELAY
830options 	NETGRAPH_GIF
831options 	NETGRAPH_GIF_DEMUX
832options 	NETGRAPH_HOLE
833options 	NETGRAPH_IFACE
834options 	NETGRAPH_IP_INPUT
835options 	NETGRAPH_IPFW
836options 	NETGRAPH_KSOCKET
837options 	NETGRAPH_L2TP
838options 	NETGRAPH_LMI
839options 	NETGRAPH_MPPC_COMPRESSION
840options 	NETGRAPH_MPPC_ENCRYPTION
841options 	NETGRAPH_NETFLOW
842options 	NETGRAPH_NAT
843options 	NETGRAPH_ONE2MANY
844options 	NETGRAPH_PATCH
845options 	NETGRAPH_PIPE
846options 	NETGRAPH_PPP
847options 	NETGRAPH_PPPOE
848options 	NETGRAPH_PPTPGRE
849options 	NETGRAPH_PRED1
850options 	NETGRAPH_RFC1490
851options 	NETGRAPH_SOCKET
852options 	NETGRAPH_SPLIT
853options 	NETGRAPH_TAG
854options 	NETGRAPH_TCPMSS
855options 	NETGRAPH_TEE
856options 	NETGRAPH_UI
857options 	NETGRAPH_VJC
858options 	NETGRAPH_VLAN
859
860# Network stack virtualization.
861options 	VIMAGE
862options 	VNET_DEBUG	# debug for VIMAGE
863
864#
865# Network interfaces:
866#  The `loop' device is MANDATORY when networking is enabled.
867device		loop
868
869#  The `ether' device provides generic code to handle
870#  Ethernets; it is MANDATORY when an Ethernet device driver is
871#  configured.
872device		ether
873
874#  The `vlan' device implements the VLAN tagging of Ethernet frames
875#  according to IEEE 802.1Q.
876device		vlan
877
878# The `vxlan' device implements the VXLAN encapsulation of Ethernet
879# frames in UDP packets according to RFC7348.
880device		vxlan
881
882#  The `wlan' device provides generic code to support 802.11
883#  drivers, including host AP mode; it is MANDATORY for the wi,
884#  and ath drivers and will eventually be required by all 802.11 drivers.
885device		wlan
886options 	IEEE80211_DEBUG		#enable debugging msgs
887options 	IEEE80211_DEBUG_REFCNT
888options 	IEEE80211_SUPPORT_MESH	#enable 802.11s D3.0 support
889options 	IEEE80211_SUPPORT_TDMA	#enable TDMA support
890
891#  The `wlan_wep', `wlan_tkip', and `wlan_ccmp' devices provide
892#  support for WEP, TKIP, and AES-CCMP crypto protocols optionally
893#  used with 802.11 devices that depend on the `wlan' module.
894device		wlan_wep
895device		wlan_ccmp
896device		wlan_tkip
897
898#  The `wlan_xauth' device provides support for external (i.e. user-mode)
899#  authenticators for use with 802.11 drivers that use the `wlan'
900#  module and support 802.1x and/or WPA security protocols.
901device		wlan_xauth
902
903#  The `wlan_acl' device provides a MAC-based access control mechanism
904#  for use with 802.11 drivers operating in ap mode and using the
905#  `wlan' module.
906#  The 'wlan_amrr' device provides AMRR transmit rate control algorithm
907device		wlan_acl
908device		wlan_amrr
909
910#  The `bpf' device enables the Berkeley Packet Filter.  Be
911#  aware of the legal and administrative consequences of enabling this
912#  option.  DHCP requires bpf.
913device		bpf
914
915#  The `netmap' device implements memory-mapped access to network
916#  devices from userspace, enabling wire-speed packet capture and
917#  generation even at 10Gbit/s. Requires support in the device
918#  driver. Supported drivers are ixgbe, e1000, re.
919device		netmap
920
921#  The `disc' device implements a minimal network interface,
922#  which throws away all packets sent and never receives any.  It is
923#  included for testing and benchmarking purposes.
924device		disc
925
926# The `epair' device implements a virtual back-to-back connected Ethernet
927# like interface pair.
928device		epair
929
930#  The `edsc' device implements a minimal Ethernet interface,
931#  which discards all packets sent and receives none.
932device		edsc
933
934#  The `tuntap' device implements (user-)ppp, nos-tun(8) and a pty-like virtual
935#  Ethernet interface
936device		tuntap
937
938#  The `gif' device implements IPv6 over IP4 tunneling,
939#  IPv4 over IPv6 tunneling, IPv4 over IPv4 tunneling and
940#  IPv6 over IPv6 tunneling.
941#  The `gre' device implements GRE (Generic Routing Encapsulation) tunneling,
942#  as specified in the RFC 2784 and RFC 2890.
943#  The `me' device implements Minimal Encapsulation within IPv4 as
944#  specified in the RFC 2004.
945#  The XBONEHACK option allows the same pair of addresses to be configured on
946#  multiple gif interfaces.
947device		gif
948device		gre
949device		me
950options 	XBONEHACK
951
952#  The `stf' device implements 6to4 encapsulation.
953device		stf
954
955# The pf packet filter consists of three devices:
956#  The `pf' device provides /dev/pf and the firewall code itself.
957#  The `pflog' device provides the pflog0 interface which logs packets.
958#  The `pfsync' device provides the pfsync0 interface used for
959#   synchronization of firewall state tables (over the net).
960device		pf
961device		pflog
962device		pfsync
963
964# Bridge interface.
965device		if_bridge
966
967# Common Address Redundancy Protocol. See carp(4) for more details.
968device		carp
969
970# IPsec interface.
971device		enc
972
973# Link aggregation interface.
974device		lagg
975
976# WireGuard interface.
977device		wg
978
979# dummymbuf – mbuf alteration pfil hooks
980device		dummymbuf
981
982#
983# Internet family options:
984#
985# MROUTING enables the kernel multicast packet forwarder, which works
986# with mrouted and XORP.
987#
988# IPFIREWALL enables support for IP firewall construction, in
989# conjunction with the `ipfw' program.  IPFIREWALL_VERBOSE sends
990# logged packets to the system logger.  IPFIREWALL_VERBOSE_LIMIT
991# limits the number of times a matching entry can be logged.
992#
993# WARNING:  IPFIREWALL defaults to a policy of "deny ip from any to any"
994# and if you do not add other rules during startup to allow access,
995# YOU WILL LOCK YOURSELF OUT.  It is suggested that you set firewall_type=open
996# in /etc/rc.conf when first enabling this feature, then refining the
997# firewall rules in /etc/rc.firewall after you've tested that the new kernel
998# feature works properly.
999#
1000# IPFIREWALL_DEFAULT_TO_ACCEPT causes the default rule (at boot) to
1001# allow everything.  Use with care, if a cracker can crash your
1002# firewall machine, they can get to your protected machines.  However,
1003# if you are using it as an as-needed filter for specific problems as
1004# they arise, then this may be for you.  Changing the default to 'allow'
1005# means that you won't get stuck if the kernel and /sbin/ipfw binary get
1006# out of sync.
1007#
1008# IPDIVERT enables the divert IP sockets, used by ``ipfw divert''.  It
1009# depends on IPFIREWALL if compiled into the kernel.
1010#
1011# IPFIREWALL_NAT adds support for in kernel nat in ipfw, and it requires
1012# LIBALIAS.
1013#
1014# IPFIREWALL_NAT64 adds support for in kernel NAT64 in ipfw.
1015#
1016# IPFIREWALL_NPTV6 adds support for in kernel NPTv6 in ipfw.
1017#
1018# IPFIREWALL_PMOD adds support for protocols modification module. Currently
1019# it supports only TCP MSS modification.
1020#
1021# IPSTEALTH enables code to support stealth forwarding (i.e., forwarding
1022# packets without touching the TTL).  This can be useful to hide firewalls
1023# from traceroute and similar tools.
1024#
1025# PF_DEFAULT_TO_DROP causes the default pf(4) rule to deny everything.
1026#
1027# TCPPCAP enables code which keeps the last n packets sent and received
1028# on a TCP socket.
1029#
1030# TCP_BLACKBOX enables enhanced TCP event logging.
1031#
1032# TCP_HHOOK enables the hhook(9) framework hooks for the TCP stack.
1033# SOCKET_HHOOK enables the hhook(9) framework hooks for socket operations.
1034#
1035# ROUTE_MPATH provides support for multipath routing.
1036#
1037options 	MROUTING		# Multicast routing
1038options 	IPFIREWALL		#firewall
1039options 	IPFIREWALL_VERBOSE	#enable logging to syslogd(8)
1040options 	IPFIREWALL_VERBOSE_LIMIT=100	#limit verbosity
1041options 	IPFIREWALL_DEFAULT_TO_ACCEPT	#allow everything by default
1042options 	IPFIREWALL_NAT		#ipfw kernel nat support
1043options 	IPFIREWALL_NAT64	#ipfw kernel NAT64 support
1044options 	IPFIREWALL_NPTV6	#ipfw kernel IPv6 NPT support
1045options 	IPDIVERT		#divert sockets
1046options 	IPFILTER		#ipfilter support
1047options 	IPFILTER_LOG		#ipfilter logging
1048options 	IPFILTER_LOOKUP		#ipfilter pools
1049options 	IPFILTER_DEFAULT_BLOCK	#block all packets by default
1050options 	IPSTEALTH		#support for stealth forwarding
1051options 	PF_DEFAULT_TO_DROP	#drop everything by default
1052options 	TCPPCAP
1053options 	TCP_BLACKBOX
1054options 	TCP_HHOOK
1055options		SOCKET_HHOOK
1056options 	ROUTE_MPATH
1057
1058# The MBUF_STRESS_TEST option enables options which create
1059# various random failures / extreme cases related to mbuf
1060# functions.  See mbuf(9) for a list of available test cases.
1061# MBUF_PROFILING enables code to profile the mbuf chains
1062# exiting the system (via participating interfaces) and
1063# return a logarithmic histogram of monitored parameters
1064# (e.g. packet size, wasted space, number of mbufs in chain).
1065options 	MBUF_STRESS_TEST
1066options 	MBUF_PROFILING
1067
1068# Statically link in accept filters
1069options 	ACCEPT_FILTER_DATA
1070options 	ACCEPT_FILTER_DNS
1071options 	ACCEPT_FILTER_HTTP
1072options		ACCEPT_FILTER_TLS
1073
1074# TCP_SIGNATURE adds support for RFC 2385 (TCP-MD5) digests. These are
1075# carried in TCP option 19. This option is commonly used to protect
1076# TCP sessions (e.g. BGP) where IPSEC is not available nor desirable.
1077# This is enabled on a per-socket basis using the TCP_MD5SIG socket option.
1078# This requires the use of 'device crypto' and either 'options IPSEC' or
1079# 'options IPSEC_SUPPORT'.
1080options 	TCP_SIGNATURE		#include support for RFC 2385
1081
1082# DUMMYNET enables the "dummynet" bandwidth limiter.  You need IPFIREWALL
1083# as well.  See dummynet(4) and ipfw(8) for more info.  When you run
1084# DUMMYNET, HZ/kern.hz should be at least 1000 for adequate response.
1085options 	DUMMYNET
1086
1087# The DEBUGNET option enables a basic debug/panic-time networking API.  It
1088# is used by NETDUMP and NETGDB.
1089options 	DEBUGNET
1090
1091# The NETDUMP option enables netdump(4) client support in the kernel.
1092# This allows a panicking kernel to transmit a kernel dump to a remote host.
1093options 	NETDUMP
1094
1095# The NETGDB option enables netgdb(4) support in the kernel.  This allows a
1096# panicking kernel to be debugged as a GDB remote over the network.
1097options 	NETGDB
1098
1099#####################################################################
1100# FILESYSTEM OPTIONS
1101
1102#
1103# Only the root filesystem needs to be statically compiled or preloaded
1104# as module; everything else will be automatically loaded at mount
1105# time.  Some people still prefer to statically compile other
1106# filesystems as well.
1107#
1108# NB: The UNION filesystem was known to be buggy in the past.  It is now
1109# being actively maintained, although there are still some issues being
1110# resolved.
1111#
1112
1113# One of these is mandatory:
1114options 	FFS			#Fast filesystem
1115options 	NFSCL			#Network File System client
1116
1117# The rest are optional:
1118options 	AUTOFS			#Automounter filesystem
1119options 	CD9660			#ISO 9660 filesystem
1120options 	FDESCFS			#File descriptor filesystem
1121options 	FUSEFS			#FUSEFS support module
1122options 	MSDOSFS			#MS DOS File System (FAT, FAT32)
1123options 	NFSLOCKD		#Network Lock Manager
1124options 	NFSD			#Network Filesystem Server
1125options 	KGSSAPI			#Kernel GSSAPI implementation
1126
1127options 	NULLFS			#NULL filesystem
1128options 	PROCFS			#Process filesystem (requires PSEUDOFS)
1129options 	PSEUDOFS		#Pseudo-filesystem framework
1130options 	PSEUDOFS_TRACE		#Debugging support for PSEUDOFS
1131options 	SMBFS			#SMB/CIFS filesystem
1132options 	TMPFS			#Efficient memory filesystem
1133options 	UDF			#Universal Disk Format
1134options 	UNIONFS			#Union filesystem
1135# The xFS_ROOT options REQUIRE the associated ``options xFS''
1136options 	NFS_ROOT		#NFS usable as root device
1137
1138# Soft updates is a technique for improving filesystem speed and
1139# making abrupt shutdown less risky.
1140#
1141options 	SOFTUPDATES
1142
1143# Extended attributes allow additional data to be associated with files,
1144# and is used for ACLs, Capabilities, and MAC labels.
1145# See src/sys/ufs/ufs/README.extattr for more information.
1146options 	UFS_EXTATTR
1147options 	UFS_EXTATTR_AUTOSTART
1148
1149# Access Control List support for UFS filesystems.  The current ACL
1150# implementation requires extended attribute support, UFS_EXTATTR,
1151# for the underlying filesystem.
1152# See src/sys/ufs/ufs/README.acls for more information.
1153options 	UFS_ACL
1154
1155# Directory hashing improves the speed of operations on very large
1156# directories at the expense of some memory.
1157options 	UFS_DIRHASH
1158
1159# Gjournal-based UFS journaling support.
1160options 	UFS_GJOURNAL
1161
1162# Make space in the kernel for a root filesystem on a md device.
1163# Define to the number of kilobytes to reserve for the filesystem.
1164# This is now optional.
1165# If not defined, the root filesystem passed in as the MFS_IMAGE makeoption
1166# will be automatically embedded in the kernel during linking. Its exact size
1167# will be consumed within the kernel.
1168# If defined, the old way of embedding the filesystem in the kernel will be
1169# used. That is to say MD_ROOT_SIZE KB will be allocated in the kernel and
1170# later, the filesystem image passed in as the MFS_IMAGE makeoption will be
1171# dd'd into the reserved space if it fits.
1172options 	MD_ROOT_SIZE=10
1173
1174# Make the md device a potential root device, either with preloaded
1175# images of type mfs_root or md_root.
1176options 	MD_ROOT
1177
1178# Write-protect the md root device so that it may not be mounted writeable.
1179options 	MD_ROOT_READONLY
1180
1181# Allow to read MD image from external memory regions
1182options 	MD_ROOT_MEM
1183
1184# Disk quotas are supported when this option is enabled.
1185options 	QUOTA			#enable disk quotas
1186
1187# If you are running a machine just as a fileserver for PC and MAC
1188# users, using SAMBA, you may consider setting this option
1189# and keeping all those users' directories on a filesystem that is
1190# mounted with the suiddir option. This gives new files the same
1191# ownership as the directory (similar to group). It's a security hole
1192# if you let these users run programs, so confine it to file-servers
1193# (but it'll save you lots of headaches in those cases). Root owned
1194# directories are exempt and X bits are cleared. The suid bit must be
1195# set on the directory as well; see chmod(1). PC owners can't see/set
1196# ownerships so they keep getting their toes trodden on. This saves
1197# you all the support calls as the filesystem it's used on will act as
1198# they expect: "It's my dir so it must be my file".
1199#
1200options 	SUIDDIR
1201
1202# NFS options:
1203options 	NFS_MINATTRTIMO=3	# VREG attrib cache timeout in sec
1204options 	NFS_MAXATTRTIMO=60
1205options 	NFS_MINDIRATTRTIMO=30	# VDIR attrib cache timeout in sec
1206options 	NFS_MAXDIRATTRTIMO=60
1207options 	NFS_DEBUG		# Enable NFS Debugging
1208
1209#
1210# Add support for the EXT2FS filesystem of Linux fame.  Be a bit
1211# careful with this - the ext2fs code has a tendency to lag behind
1212# changes and not be exercised very much, so mounting read/write could
1213# be dangerous (and even mounting read only could result in panics.)
1214#
1215options 	EXT2FS
1216
1217# The system memory devices; /dev/mem, /dev/kmem
1218device		mem
1219
1220# The kernel symbol table device; /dev/ksyms
1221device		ksyms
1222
1223# Optional character code conversion support with LIBICONV.
1224# Each option requires their base file system and LIBICONV.
1225options 	CD9660_ICONV
1226options 	MSDOSFS_ICONV
1227options 	UDF_ICONV
1228
1229
1230#####################################################################
1231# POSIX P1003.1B
1232
1233# Real time extensions added in the 1993 POSIX
1234# _KPOSIX_PRIORITY_SCHEDULING: Build in _POSIX_PRIORITY_SCHEDULING
1235
1236options 	_KPOSIX_PRIORITY_SCHEDULING
1237# p1003_1b_semaphores are very experimental,
1238# user should be ready to assist in debugging if problems arise.
1239options 	P1003_1B_SEMAPHORES
1240
1241# POSIX message queue
1242options 	P1003_1B_MQUEUE
1243
1244#####################################################################
1245# SECURITY POLICY PARAMETERS
1246
1247# Support for BSM audit
1248options 	AUDIT
1249
1250# Support for Mandatory Access Control (MAC):
1251options 	MAC
1252options 	MAC_BIBA
1253options 	MAC_BSDEXTENDED
1254options 	MAC_DDB
1255options 	MAC_IFOFF
1256options 	MAC_IPACL
1257options 	MAC_LOMAC
1258options 	MAC_MLS
1259options 	MAC_NONE
1260options 	MAC_NTPD
1261options 	MAC_PARTITION
1262options 	MAC_PORTACL
1263options 	MAC_PRIORITY
1264options 	MAC_SEEOTHERUIDS
1265options 	MAC_STUB
1266options 	MAC_TEST
1267options 	MAC_VERIEXEC
1268options 	MAC_VERIEXEC_SHA1
1269options 	MAC_VERIEXEC_SHA256
1270options 	MAC_VERIEXEC_SHA384
1271options 	MAC_VERIEXEC_SHA512
1272device		mac_veriexec_parser
1273
1274# Support for Capsicum
1275options 	CAPABILITIES	# fine-grained rights on file descriptors
1276options 	CAPABILITY_MODE	# sandboxes with no global namespace access
1277
1278
1279#####################################################################
1280# CLOCK OPTIONS
1281
1282# The granularity of operation is controlled by the kernel option HZ (default
1283# frequency of 1000 Hz or a period 1ms between calls). Virtual machine guests
1284# use a value of 100. Lower values may lower overhead at the expense of accuracy
1285# of scheduling, though the adaptive tick code reduces that overhead.
1286
1287options 	HZ=100
1288
1289# Enable support for the kernel PLL to use an external PPS signal,
1290# under supervision of [x]ntpd(8)
1291# More info in ntpd documentation: http://www.eecis.udel.edu/~ntp
1292
1293options 	PPS_SYNC
1294
1295# Enable support for generic feed-forward clocks in the kernel.
1296# The feed-forward clock support is an alternative to the feedback oriented
1297# ntpd/system clock approach, and is to be used with a feed-forward
1298# synchronization algorithm such as the RADclock:
1299# More info here: http://www.synclab.org/radclock
1300
1301options 	FFCLOCK
1302
1303
1304#####################################################################
1305# SCSI DEVICES
1306
1307# SCSI DEVICE CONFIGURATION
1308
1309# The SCSI subsystem consists of the `base' SCSI code, a number of
1310# high-level SCSI device `type' drivers, and the low-level host-adapter
1311# device drivers.  The host adapters are listed in the ISA and PCI
1312# device configuration sections below.
1313#
1314# It is possible to wire down your SCSI devices so that a given bus,
1315# target, and LUN always come on line as the same device unit.  In
1316# earlier versions the unit numbers were assigned in the order that
1317# the devices were probed on the SCSI bus.  This means that if you
1318# removed a disk drive, you may have had to rewrite your /etc/fstab
1319# file, and also that you had to be careful when adding a new disk
1320# as it may have been probed earlier and moved your device configuration
1321# around.
1322
1323# This old behavior is maintained as the default behavior.  The unit
1324# assignment begins with the first non-wired down unit for a device
1325# type.  For example, if you wire a disk as "da3" then the first
1326# non-wired disk will be assigned da4.
1327
1328# The syntax for wiring down devices is:
1329
1330envvar		hint.scbus.0.at="ahc0"
1331envvar		hint.scbus.1.at="ahc1"
1332envvar		hint.scbus.1.bus="0"
1333envvar		hint.scbus.3.at="ahc2"
1334envvar		hint.scbus.3.bus="0"
1335envvar		hint.scbus.2.at="ahc2"
1336envvar		hint.scbus.2.bus="1"
1337envvar		hint.da.0.at="scbus0"
1338envvar		hint.da.0.target="0"
1339envvar		hint.da.0.unit="0"
1340envvar		hint.da.1.at="scbus3"
1341envvar		hint.da.1.target="1"
1342envvar		hint.da.2.at="scbus2"
1343envvar		hint.da.2.target="3"
1344envvar		hint.sa.1.at="scbus1"
1345envvar		hint.sa.1.target="6"
1346
1347# "units" (SCSI logical unit number) that are not specified are
1348# treated as if specified as LUN 0.
1349
1350# All SCSI devices allocate as many units as are required.
1351
1352# The ch driver drives SCSI Media Changer ("jukebox") devices.
1353#
1354# The da driver drives SCSI Direct Access ("disk") and Optical Media
1355# ("WORM") devices.
1356#
1357# The sa driver drives SCSI Sequential Access ("tape") devices.
1358#
1359# The cd driver drives SCSI Read Only Direct Access ("cd") devices.
1360#
1361# The ses driver drives SCSI Environment Services ("ses") and
1362# SAF-TE ("SCSI Accessible Fault-Tolerant Enclosure") devices.
1363#
1364# The pt driver drives SCSI Processor devices.
1365#
1366# The sg driver provides a passthrough API that is compatible with the
1367# Linux SG driver.  It will work in conjunction with the Linuxulator
1368# to run linux SG apps.  It can also stand on its own and provide
1369# source level API compatibility for porting apps to FreeBSD.
1370#
1371# Target Mode support is provided here but also requires that a SIM
1372# (SCSI Host Adapter Driver) provide support as well.
1373#
1374# The targ driver provides target mode support as a Processor type device.
1375# It exists to give the minimal context necessary to respond to Inquiry
1376# commands. There is a sample user application that shows how the rest
1377# of the command support might be done in /usr/share/examples/scsi_target.
1378#
1379# The targbh driver provides target mode support and exists to respond
1380# to incoming commands that do not otherwise have a logical unit assigned
1381# to them.
1382#
1383# The pass driver provides a passthrough API to access the CAM subsystem.
1384
1385device		scbus		#base SCSI code
1386device		ch		#SCSI media changers
1387device		da		#SCSI direct access devices (aka disks)
1388device		sa		#SCSI tapes
1389device		cd		#SCSI CD-ROMs
1390device		ses		#Enclosure Services (SES and SAF-TE)
1391device		pt		#SCSI processor
1392device		targ		#SCSI Target Mode Code
1393device		targbh		#SCSI Target Mode Blackhole Device
1394device		pass		#CAM passthrough driver
1395device		sg		#Linux SCSI passthrough
1396device		ctl		#CAM Target Layer
1397
1398# CAM OPTIONS:
1399# debugging options:
1400# CAMDEBUG		Compile in all possible debugging.
1401# CAM_DEBUG_COMPILE	Debug levels to compile in.
1402# CAM_DEBUG_FLAGS	Debug levels to enable on boot.
1403# CAM_DEBUG_BUS		Limit debugging to the given bus.
1404# CAM_DEBUG_TARGET	Limit debugging to the given target.
1405# CAM_DEBUG_LUN		Limit debugging to the given lun.
1406# CAM_DEBUG_DELAY	Delay in us after printing each debug line.
1407# CAM_IO_STATS		Publish additional CAM device statics by sysctl
1408#
1409# CAM_MAX_HIGHPOWER: Maximum number of concurrent high power (start unit) cmds
1410# SCSI_NO_SENSE_STRINGS: When defined disables sense descriptions
1411# SCSI_NO_OP_STRINGS: When defined disables opcode descriptions
1412# SCSI_DELAY: The number of MILLISECONDS to freeze the SIM (scsi adapter)
1413#             queue after a bus reset, and the number of milliseconds to
1414#             freeze the device queue after a bus device reset.  This
1415#             can be changed at boot and runtime with the
1416#             kern.cam.scsi_delay tunable/sysctl.
1417options 	CAMDEBUG
1418options 	CAM_DEBUG_COMPILE=-1
1419options 	CAM_DEBUG_FLAGS=(CAM_DEBUG_INFO|CAM_DEBUG_PROBE|CAM_DEBUG_PERIPH)
1420options 	CAM_DEBUG_BUS=-1
1421options 	CAM_DEBUG_TARGET=-1
1422options 	CAM_DEBUG_LUN=-1
1423options 	CAM_DEBUG_DELAY=1
1424options 	CAM_MAX_HIGHPOWER=4
1425options 	SCSI_NO_SENSE_STRINGS
1426options 	SCSI_NO_OP_STRINGS
1427options 	SCSI_DELAY=5000	# Be pessimistic about Joe SCSI device
1428options 	CAM_IOSCHED_DYNAMIC
1429options 	CAM_IO_STATS
1430options 	CAM_TEST_FAILURE
1431
1432# Options for the CAM CDROM driver:
1433# CHANGER_MIN_BUSY_SECONDS: Guaranteed minimum time quantum for a changer LUN
1434# CHANGER_MAX_BUSY_SECONDS: Maximum time quantum per changer LUN, only
1435#                           enforced if there is I/O waiting for another LUN
1436# The compiled in defaults for these variables are 2 and 10 seconds,
1437# respectively.
1438#
1439# These can also be changed on the fly with the following sysctl variables:
1440# kern.cam.cd.changer.min_busy_seconds
1441# kern.cam.cd.changer.max_busy_seconds
1442#
1443options 	CHANGER_MIN_BUSY_SECONDS=2
1444options 	CHANGER_MAX_BUSY_SECONDS=10
1445
1446# Options for the CAM sequential access driver:
1447# SA_IO_TIMEOUT: Timeout for read/write/wfm  operations, in minutes
1448# SA_SPACE_TIMEOUT: Timeout for space operations, in minutes
1449# SA_REWIND_TIMEOUT: Timeout for rewind operations, in minutes
1450# SA_ERASE_TIMEOUT: Timeout for erase operations, in minutes
1451# SA_1FM_AT_EOD: Default to model which only has a default one filemark at EOT.
1452options 	SA_IO_TIMEOUT=4
1453options 	SA_SPACE_TIMEOUT=60
1454options 	SA_REWIND_TIMEOUT=(2*60)
1455options 	SA_ERASE_TIMEOUT=(4*60)
1456options 	SA_1FM_AT_EOD
1457
1458# Optional timeout for the CAM processor target (pt) device
1459# This is specified in seconds.  The default is 60 seconds.
1460options 	SCSI_PT_DEFAULT_TIMEOUT=60
1461
1462# Optional enable of doing SES passthrough on other devices (e.g., disks)
1463#
1464# Normally disabled because a lot of newer SCSI disks report themselves
1465# as having SES capabilities, but this can then clot up attempts to build
1466# a topology with the SES device that's on the box these drives are in....
1467options 	SES_ENABLE_PASSTHROUGH
1468
1469# iSCSI
1470#
1471# iSCSI permits access to SCSI peripherals over a network connection
1472# (e.g. via a TCP/IP socket)
1473
1474device		cfiscsi		# CAM Target Layer iSCSI target frontend
1475device		iscsi		# iSCSI initiator
1476device		iser		# iSCSI Extensions for RDMA (iSER) initiator
1477
1478
1479#####################################################################
1480# MISCELLANEOUS DEVICES AND OPTIONS
1481
1482device		pty		#BSD-style compatibility pseudo ttys
1483device		nmdm		#back-to-back tty devices
1484device		md		#Memory/malloc disk
1485device		snp		#Snoop device - to look at pty/vty/etc..
1486device		ccd		#Concatenated disk driver
1487device		firmware	#firmware(9) support
1488
1489# Kernel side iconv library
1490options 	LIBICONV
1491
1492# Size of the kernel message buffer.  Should be N * pagesize.
1493options 	MSGBUF_SIZE=40960
1494
1495
1496#####################################################################
1497# HARDWARE BUS CONFIGURATION
1498
1499#
1500# PCI bus & PCI options:
1501#
1502device		pci
1503options 	PCI_HP			# PCI-Express native HotPlug
1504options 	PCI_IOV			# PCI SR-IOV support
1505
1506
1507#####################################################################
1508# HARDWARE DEVICE CONFIGURATION
1509
1510# For ISA the required hints are listed.
1511# PCI, CardBus, and SD/MMC are self identifying buses, so
1512# no hints are needed.
1513
1514#
1515# Mandatory devices:
1516#
1517
1518# These options are valid for other keyboard drivers as well.
1519options 	KBD_DISABLE_KEYMAP_LOAD	# refuse to load a keymap
1520options 	KBD_INSTALL_CDEV	# install a CDEV entry in /dev
1521
1522# Define keyboard latency (try 200/15 for a snappy interactive console)
1523options 	KBD_DELAY1=200		# define initial key delay
1524options 	KBD_DELAY2=15		# define key delay
1525
1526device		kbdmux			# keyboard multiplexer
1527options 	KBDMUX_DFLT_KEYMAP	# specify the built-in keymap
1528makeoptions	KBDMUX_DFLT_KEYMAP=it.iso
1529
1530options 	FB_DEBUG		# Frame buffer debugging
1531
1532# Enable experimental features of the syscons terminal emulator (teken).
1533options 	TEKEN_CONS25		# cons25-style terminal emulation
1534options 	TEKEN_UTF8		# UTF-8 output handling
1535
1536# The vt video console driver.
1537device		vt
1538options 	VT_ALT_TO_ESC_HACK=1	# Prepend ESC sequence to ALT keys
1539options 	VT_MAXWINDOWS=16	# Number of virtual consoles
1540options 	VT_TWOBUTTON_MOUSE	# Use right mouse button to paste
1541
1542# The following options set the maximum framebuffer size.
1543options 	VT_FB_MAX_HEIGHT=480
1544options 	VT_FB_MAX_WIDTH=640
1545
1546# The following options will let you change the default vt terminal colors.
1547options 	TERMINAL_NORM_ATTR=(FG_GREEN|BG_BLACK)
1548options 	TERMINAL_KERN_ATTR=(FG_LIGHTRED|BG_BLACK)
1549
1550#
1551# Optional devices:
1552#
1553
1554#
1555# SCSI host adapters:
1556#
1557# aacraid: Adaptec by PMC RAID controllers, Series 6/7/8 and upcoming
1558#          families. Container interface, CAM required.
1559# ahc: Adaptec 274x/284x/2910/293x/294x/394x/3950x/3960x/398X/4944/
1560#      19160x/29160x, aic7770/aic78xx
1561# ahd: Adaptec 29320/39320 Controllers.
1562# isp: Qlogic ISP 1020, 1040 and 1040B PCI SCSI host adapters,
1563#      ISP 1240 Dual Ultra SCSI, ISP 1080 and 1280 (Dual) Ultra2,
1564#      ISP 12160 Ultra3 SCSI,
1565#      Qlogic ISP 2100 and ISP 2200 1Gb Fibre Channel host adapters.
1566#      Qlogic ISP 2300 and ISP 2312 2Gb Fibre Channel host adapters.
1567#      Qlogic ISP 2322 and ISP 6322 2Gb Fibre Channel host adapters.
1568# ispfw: Firmware module for Qlogic host adapters
1569# mpr: LSI-Logic MPT/Fusion Gen 3
1570# mps: LSI-Logic MPT/Fusion Gen 2
1571# mpt: LSI-Logic MPT/Fusion 53c1020 or 53c1030 Ultra4
1572#      or FC9x9 Fibre Channel host adapters.
1573# sym: Symbios/Logic 53C8XX family of PCI-SCSI I/O processors:
1574#      53C810, 53C810A, 53C815, 53C825,  53C825A, 53C860, 53C875,
1575#      53C876, 53C885,  53C895, 53C895A, 53C896,  53C897, 53C1510D,
1576#      53C1010-33, 53C1010-66.
1577
1578device		aacraid
1579device		ahc
1580device		ahd
1581device		isp
1582envvar		hint.isp.0.disable="1"
1583envvar		hint.isp.0.role="3"
1584envvar		hint.isp.0.prefer_iomap="1"
1585envvar		hint.isp.0.prefer_memmap="1"
1586envvar		hint.isp.0.fwload_disable="1"
1587envvar		hint.isp.0.ignore_nvram="1"
1588envvar		hint.isp.0.fullduplex="1"
1589envvar		hint.isp.0.topology="lport"
1590envvar		hint.isp.0.topology="nport"
1591envvar		hint.isp.0.topology="lport-only"
1592envvar		hint.isp.0.topology="nport-only"
1593# we can't get u_int64_t types, nor can we get strings if it's got
1594# a leading 0x, hence this silly dodge.
1595envvar		hint.isp.0.portwnn="w50000000aaaa0000"
1596envvar		hint.isp.0.nodewnn="w50000000aaaa0001"
1597device		ispfw
1598device		mpr			# LSI-Logic MPT-Fusion 3
1599device		mps			# LSI-Logic MPT-Fusion 2
1600device		mpt			# LSI-Logic MPT-Fusion
1601device		sym
1602
1603# The aic7xxx driver will attempt to use memory mapped I/O for all PCI
1604# controllers that have it configured only if this option is set. Unfortunately,
1605# this doesn't work on some motherboards, which prevents it from being the
1606# default.
1607options 	AHC_ALLOW_MEMIO
1608
1609# Dump the contents of the ahc controller configuration PROM.
1610options 	AHC_DUMP_EEPROM
1611
1612# Bitmap of units to enable targetmode operations.
1613options 	AHC_TMODE_ENABLE
1614
1615# Compile in Aic7xxx Debugging code.
1616options 	AHC_DEBUG
1617
1618# Aic7xxx driver debugging options. See sys/dev/aic7xxx/aic7xxx.h
1619options 	AHC_DEBUG_OPTS
1620
1621# Print register bitfields in debug output.  Adds ~128k to driver
1622# See ahc(4).
1623options 	AHC_REG_PRETTY_PRINT
1624
1625# Compile in aic79xx debugging code.
1626options 	AHD_DEBUG
1627
1628# Aic79xx driver debugging options.  Adds ~215k to driver.  See ahd(4).
1629options 	AHD_DEBUG_OPTS=0xFFFFFFFF
1630
1631# Print human-readable register definitions when debugging
1632options 	AHD_REG_PRETTY_PRINT
1633
1634# Bitmap of units to enable targetmode operations.
1635options 	AHD_TMODE_ENABLE
1636
1637# Options used in dev/isp/ (Qlogic SCSI/FC driver).
1638#
1639#	ISP_TARGET_MODE		-	enable target mode operation
1640#
1641options 	ISP_TARGET_MODE=1
1642#
1643#	ISP_DEFAULT_ROLES	-	default role
1644#		none=0
1645#		target=1
1646#		initiator=2
1647#		both=3			(not supported currently)
1648#
1649#	ISP_INTERNAL_TARGET		(trivial internal disk target, for testing)
1650#
1651options 	ISP_DEFAULT_ROLES=0
1652
1653#options 	SYM_SETUP_SCSI_DIFF	#-HVD support for 825a, 875, 885
1654					# disabled:0 (default), enabled:1
1655#options 	SYM_SETUP_PCI_PARITY	#-PCI parity checking
1656					# disabled:0, enabled:1 (default)
1657#options 	SYM_SETUP_MAX_LUN	#-Number of LUNs supported
1658					# default:8, range:[1..64]
1659
1660#
1661# Compaq "CISS" RAID controllers (SmartRAID 5* series)
1662# These controllers have a SCSI-like interface, and require the
1663# CAM infrastructure.
1664#
1665device		ciss
1666
1667#
1668# Compaq Smart RAID, Mylex DAC960 and AMI MegaRAID controllers.  Only
1669# one entry is needed; the code will find and configure all supported
1670# controllers.
1671#
1672device		ida		# Compaq Smart RAID
1673device		mlx		# Mylex DAC960
1674device		mfi		# LSI MegaRAID SAS
1675device		mfip		# LSI MegaRAID SAS passthrough, requires CAM
1676options 	MFI_DEBUG
1677device		mrsas		# LSI/Avago MegaRAID SAS/SATA, 6Gb/s and 12Gb/s
1678
1679# NVM Express
1680#
1681# nvme:	PCI-express NVM Express host controllers
1682# nvmf:	NVM Express over Fabrics host
1683# nvmft: NVM Express over Fabrics CAM Target Layer frontend
1684# nvmf_tcp: TCP transport for NVM Express over Fabrics
1685# nda:	CAM NVMe disk driver
1686# nvd:	non-CAM NVMe disk driver
1687
1688device		nvme		# PCI-express NVMe host driver
1689options 	NVME_USE_NVD=1	# Use nvd(4) instead of the CAM nda(4) driver
1690device		nvmf		# NVMeoF host driver
1691device		nvmft		# NVMeoF ctl(4) frontend
1692device		nvmf_tcp	# NVMeoF TCP transport
1693device		nda		# NVMe direct access devices (aka disks)
1694device		nvd		# expose NVMe namespaces as disks, depends on nvme
1695
1696#
1697# Serial ATA host controllers:
1698#
1699# ahci: Advanced Host Controller Interface (AHCI) compatible
1700# mvs:  Marvell 88SX50XX/88SX60XX/88SX70XX/SoC controllers
1701# siis: SiliconImage SiI3124/SiI3132/SiI3531 controllers
1702#
1703# These drivers are part of cam(4) subsystem. They supersede less featured
1704# ata(4) subsystem drivers, supporting same hardware.
1705
1706device		ahci		# AHCI-compatible SATA controllers
1707device		mvs		# Marvell 88SX50XX/88SX60XX/88SX70XX/SoC SATA
1708device		siis		# SiliconImage SiI3124/SiI3132/SiI3531 SATA
1709device		ada		# ATA/SATA direct access devices (aka disks)
1710
1711#
1712# The 'ATA' driver supports all legacy ATA/ATAPI controllers, including
1713# PC Card devices. You only need one "device ata" for it to find all
1714# PCI and PC Card ATA/ATAPI devices on modern machines.
1715# Alternatively, individual bus and chipset drivers may be chosen by using
1716# the 'atacore' driver then selecting the drivers on a per vendor basis.
1717# For example to build a system which only supports a VIA chipset,
1718# omit 'ata' and include the 'atacore', 'atapci' and 'atavia' drivers.
1719device		ata		# Legacy ATA/SATA controllers
1720
1721# Modular ATA
1722#device		atacore		# Core ATA functionality
1723#device		ataisa		# ISA bus support
1724#device		atapci		# PCI bus support; only generic chipset support
1725
1726# PCI ATA chipsets
1727#device		ataacard	# ACARD
1728#device		ataacerlabs	# Acer Labs Inc. (ALI)
1729#device		ataamd		# American Micro Devices (AMD)
1730#device		ataati		# ATI
1731#device		atacenatek	# Cenatek
1732#device		atacypress	# Cypress
1733#device		atacyrix	# Cyrix
1734#device		atahighpoint	# HighPoint
1735#device		ataintel	# Intel
1736#device		ataite		# Integrated Technology Inc. (ITE)
1737#device		atajmicron	# JMicron
1738#device		atamarvell	# Marvell
1739#device		atamicron	# Micron
1740#device		atanational	# National
1741#device		atanetcell	# NetCell
1742#device		atanvidia	# nVidia
1743#device		atapromise	# Promise
1744#device		ataserverworks	# ServerWorks
1745#device		atasiliconimage	# Silicon Image Inc. (SiI) (formerly CMD)
1746#device		atasis		# Silicon Integrated Systems Corp.(SiS)
1747#device		atavia		# VIA Technologies Inc.
1748
1749#
1750# For older non-PCI, non-PnPBIOS systems, these are the hints lines to add:
1751envvar		hint.ata.0.at="isa"
1752envvar		hint.ata.0.port="0x1f0"
1753envvar		hint.ata.0.irq="14"
1754envvar		hint.ata.1.at="isa"
1755envvar		hint.ata.1.port="0x170"
1756envvar		hint.ata.1.irq="15"
1757
1758#
1759# uart: generic driver for serial interfaces.
1760#
1761device		uart
1762
1763# Options for uart(4)
1764options 	UART_PPS_ON_CTS		# Do time pulse capturing using CTS
1765					# instead of DCD.
1766options 	UART_POLL_FREQ		# Set polling rate, used when hw has
1767					# no interrupt support (50 Hz default).
1768
1769# The following hint should only be used for pure ISA devices.  It is not
1770# needed otherwise.  Use of hints is strongly discouraged.
1771envvar		hint.uart.0.at="isa"
1772
1773# The following 3 hints are used when the UART is a system device (i.e., a
1774# console or debug port), but only on platforms that don't have any other
1775# means to pass the information to the kernel.  The unit number of the hint
1776# is only used to bundle the hints together.  There is no relation to the
1777# unit number of the probed UART.
1778envvar		hint.uart.0.port="0x3f8"
1779envvar		hint.uart.0.flags="0x10"
1780envvar		hint.uart.0.baud="115200"
1781
1782# `flags' for serial drivers that support consoles, like uart(4):
1783#	0x10	enable console support for this unit.  Other console flags
1784#		(if applicable) are ignored unless this is set.  Enabling
1785#		console support does not make the unit the preferred console.
1786#		Boot with -h or set boot_serial=YES in the loader.
1787#		Currently, at most one unit can have console support; the
1788#		first one (in config file order) with this flag set is
1789#		preferred.
1790#	0x80	use this port for serial line gdb support in ddb.  Also known
1791#		as debug port.
1792#
1793
1794# Options for serial drivers that support consoles:
1795options 	BREAK_TO_DEBUGGER	# A BREAK/DBG on the console goes to
1796					# ddb, if available.
1797
1798# Solaris implements a new BREAK which is initiated by a character
1799# sequence CR ~ ^b which is similar to a familiar pattern used on
1800# Sun servers by the Remote Console.  There are FreeBSD extensions:
1801# CR ~ ^p requests force panic and CR ~ ^r requests a clean reboot.
1802options 	ALT_BREAK_TO_DEBUGGER
1803
1804# Serial Communications Controller
1805# Supports the Freescale/NXP QUad Integrated and Zilog Z8530 multi-channel
1806# communications controllers.
1807device		scc
1808
1809# PCI Universal Communications driver
1810# Supports various multi port PCI I/O cards.
1811device		puc
1812
1813#
1814# Network interfaces:
1815#
1816# MII bus support is required for many PCI Ethernet NICs,
1817# namely those which use MII-compliant transceivers or implement
1818# transceiver control interfaces that operate like an MII.  Adding
1819# "device miibus" to the kernel config pulls in support for the generic
1820# miibus API, the common support for bit-bang'ing the MII and all
1821# of the PHY drivers, including a generic one for PHYs that aren't
1822# specifically handled by an individual driver.  Support for specific
1823# PHYs may be built by adding "device mii", "device mii_bitbang" if
1824# needed by the NIC driver and then adding the appropriate PHY driver.
1825device  	mii		# Minimal MII support
1826device  	mii_bitbang	# Common module for bit-bang'ing the MII
1827device  	miibus		# MII support w/ bit-bang'ing and all PHYs
1828
1829device  	acphy		# Altima Communications AC101
1830device  	amphy		# AMD AM79c873 / Davicom DM910{1,2}
1831device  	atphy		# Attansic/Atheros F1
1832device  	axphy		# Asix Semiconductor AX88x9x
1833device  	bmtphy		# Broadcom BCM5201/BCM5202 and 3Com 3c905C
1834device		bnxt		# Broadcom NetXtreme-C/NetXtreme-E
1835device  	brgphy		# Broadcom BCM54xx/57xx 1000baseTX
1836device  	cgem		# Cadence GEM Gigabit Ethernet
1837device  	ciphy		# Cicada/Vitesse CS/VSC8xxx
1838device  	e1000phy	# Marvell 88E1000 1000/100/10-BT
1839device  	gentbi		# Generic 10-bit 1000BASE-{LX,SX} fiber ifaces
1840device  	icsphy		# ICS ICS1889-1893
1841device  	ip1000phy	# IC Plus IP1000A/IP1001
1842device  	jmphy		# JMicron JMP211/JMP202
1843device  	lxtphy		# Level One LXT-970
1844device  	nsgphy		# NatSemi DP8361/DP83865/DP83891
1845device  	nsphy		# NatSemi DP83840A
1846device  	nsphyter	# NatSemi DP83843/DP83815
1847device  	pnaphy		# HomePNA
1848device  	qsphy		# Quality Semiconductor QS6612
1849device  	rdcphy		# RDC Semiconductor R6040
1850device  	rgephy		# RealTek 8169S/8110S/8211B/8211C
1851device  	rlphy		# RealTek 8139
1852device  	rlswitch	# RealTek 8305
1853device  	smcphy		# SMSC LAN91C111
1854device  	tdkphy		# TDK 89Q2120
1855device  	truephy		# LSI TruePHY
1856device		xmphy		# XaQti XMAC II
1857
1858# ae:   Support for gigabit ethernet adapters based on the Attansic/Atheros
1859#       L2 PCI-Express FastEthernet controllers.
1860# age:  Support for gigabit ethernet adapters based on the Attansic/Atheros
1861#       L1 PCI express gigabit ethernet controllers.
1862# alc:  Support for Atheros AR8131/AR8132 PCIe ethernet controllers.
1863# ale:  Support for Atheros AR8121/AR8113/AR8114 PCIe ethernet controllers.
1864# ath:  Atheros a/b/g WiFi adapters (requires ath_hal and wlan)
1865# bce:	Broadcom NetXtreme II (BCM5706/BCM5708) PCI/PCIe Gigabit Ethernet
1866#       adapters.
1867# bfe:	Broadcom BCM4401 Ethernet adapter.
1868# bge:	Support for gigabit ethernet adapters based on the Broadcom
1869#	BCM570x family of controllers, including the 3Com 3c996-T,
1870#	the Netgear GA302T, the SysKonnect SK-9D21 and SK-9D41, and
1871#	the embedded gigE NICs on Dell PowerEdge 2550 servers.
1872# bnxt:	Broadcom NetXtreme-C and NetXtreme-E PCIe 10/25/50G Ethernet adapters.
1873# bxe:	Broadcom NetXtreme II (BCM5771X/BCM578XX) PCIe 10Gb Ethernet
1874#       adapters.
1875# bwi:	Broadcom BCM430* and BCM431* family of wireless adapters.
1876# bwn:	Broadcom BCM43xx family of wireless adapters.
1877# cas:	Sun Cassini/Cassini+ and National Semiconductor DP83065 Saturn
1878# cxgb: Chelsio T3 based 1GbE/10GbE PCIe Ethernet adapters.
1879# cxgbe:Chelsio T4, T5, and T6-based 1/10/25/40/100GbE PCIe Ethernet
1880#	adapters.
1881# cxgbev: Chelsio T4, T5, and T6-based PCIe Virtual Functions.
1882# dc:   Support for PCI fast ethernet adapters based on the DEC/Intel 21143
1883#       and various workalikes including:
1884#       the ADMtek AL981 Comet and AN985 Centaur, the ASIX Electronics
1885#       AX88140A and AX88141, the Davicom DM9100 and DM9102, the Lite-On
1886#       82c168 and 82c169 PNIC, the Lite-On/Macronix LC82C115 PNIC II
1887#       and the Macronix 98713/98713A/98715/98715A/98725 PMAC. This driver
1888#       replaces the old al, ax, dm, pn and mx drivers.  List of brands:
1889#       Digital DE500-BA, Kingston KNE100TX, D-Link DFE-570TX, SOHOware SFA110,
1890#       SVEC PN102-TX, CNet Pro110B, 120A, and 120B, Compex RL100-TX,
1891#       LinkSys LNE100TX, LNE100TX V2.0, Jaton XpressNet, Alfa Inc GFC2204,
1892#       KNE110TX.
1893# em:   Intel Pro/1000 Gigabit Ethernet 82542, 82543, 82544 based adapters.
1894# fxp:  Intel EtherExpress Pro/100B
1895#	(hint of prefer_iomap can be done to prefer I/O instead of Mem mapping)
1896# gem:  Apple GMAC/Sun ERI/Sun GEM
1897# jme:  JMicron JMC260 Fast Ethernet/JMC250 Gigabit Ethernet based adapters.
1898# le:   AMD Am7900 LANCE and Am79C9xx PCnet
1899# lge:	Support for PCI gigabit ethernet adapters based on the Level 1
1900#	LXT1001 NetCellerator chipset. This includes the D-Link DGE-500SX,
1901#	SMC TigerCard 1000 (SMC9462SX), and some Addtron cards.
1902# lio:  Support for Cavium 23XX Ethernet adapters
1903# malo: Marvell Libertas wireless NICs.
1904# mwl:  Marvell 88W8363 802.11n wireless NICs.
1905#	Requires the mwl firmware module
1906# mwlfw: Marvell 88W8363 firmware
1907# msk:	Support for gigabit ethernet adapters based on the Marvell/SysKonnect
1908#	Yukon II Gigabit controllers, including 88E8021, 88E8022, 88E8061,
1909#	88E8062, 88E8035, 88E8036, 88E8038, 88E8050, 88E8052, 88E8053,
1910#	88E8055, 88E8056 and D-Link 560T/550SX.
1911# mlxfw: Mellanox firmware update module.
1912# mlx5:	Mellanox ConnectX-4 and ConnectX-4 LX IB and Eth shared code module.
1913# mlx5en:Mellanox ConnectX-4 and ConnectX-4 LX PCIe Ethernet adapters.
1914# my:	Myson Fast Ethernet (MTD80X, MTD89X)
1915# nge:	Support for PCI gigabit ethernet adapters based on the National
1916#	Semiconductor DP83820 and DP83821 chipset. This includes the
1917#	SMC EZ Card 1000 (SMC9462TX), D-Link DGE-500T, Asante FriendlyNet
1918#	GigaNIX 1000TA and 1000TPC, the Addtron AEG320T, the Surecom
1919#	EP-320G-TX and the Netgear GA622T.
1920# oce:	Emulex 10 Gbit adapters (OneConnect Ethernet)
1921# ral:	Ralink Technology IEEE 802.11 wireless adapter
1922# re:   RealTek 8139C+/8169/816xS/811xS/8101E PCI/PCIe Ethernet adapter
1923# rl:   Support for PCI fast ethernet adapters based on the RealTek 8129/8139
1924#       chipset.  Note that the RealTek driver defaults to using programmed
1925#       I/O to do register accesses because memory mapped mode seems to cause
1926#       severe lockups on SMP hardware.  This driver also supports the
1927#       Accton EN1207D `Cheetah' adapter, which uses a chip called
1928#       the MPX 5030/5038, which is either a RealTek in disguise or a
1929#       RealTek workalike.  Note that the D-Link DFE-530TX+ uses the RealTek
1930#       chipset and is supported by this driver, not the 'vr' driver.
1931# rtwn: RealTek wireless adapters.
1932# rtwnfw: RealTek wireless firmware.
1933# sge:  Silicon Integrated Systems SiS190/191 Fast/Gigabit Ethernet adapter
1934# sis:  Support for NICs based on the Silicon Integrated Systems SiS 900,
1935#       SiS 7016 and NS DP83815 PCI fast ethernet controller chips.
1936# sk:   Support for the SysKonnect SK-984x series PCI gigabit ethernet NICs.
1937#       This includes the SK-9841 and SK-9842 single port cards (single mode
1938#       and multimode fiber) and the SK-9843 and SK-9844 dual port cards
1939#       (also single mode and multimode).
1940#       The driver will autodetect the number of ports on the card and
1941#       attach each one as a separate network interface.
1942# ste:  Sundance Technologies ST201 PCI fast ethernet controller, includes
1943#       the D-Link DFE-550TX.
1944# stge: Support for gigabit ethernet adapters based on the Sundance/Tamarack
1945#       TC9021 family of controllers, including the Sundance ST2021/ST2023,
1946#       the Sundance/Tamarack TC9021, the D-Link DL-4000 and ASUS NX1101.
1947# ti:   Support for PCI gigabit ethernet NICs based on the Alteon Networks
1948#       Tigon 1 and Tigon 2 chipsets.  This includes the Alteon AceNIC, the
1949#       3Com 3c985, the Netgear GA620 and various others.  Note that you will
1950#       probably want to bump up kern.ipc.nmbclusters a lot to use this driver.
1951# vr:   Support for various fast ethernet adapters based on the VIA
1952#       Technologies VT3043 `Rhine I' and VT86C100A `Rhine II' chips,
1953#       including the D-Link DFE520TX and D-Link DFE530TX (see 'rl' for
1954#       DFE530TX+), the Hawking Technologies PN102TX, and the AOpen/Acer ALN-320.
1955# vte:  DM&P Vortex86 RDC R6040 Fast Ethernet
1956# xl:   Support for the 3Com 3c900, 3c905, 3c905B and 3c905C (Fast)
1957#       Etherlink XL cards and integrated controllers.  This includes the
1958#       integrated 3c905B-TX chips in certain Dell Optiplex and Dell
1959#       Precision desktop machines and the integrated 3c905-TX chips
1960#       in Dell Latitude laptop docking stations.
1961#       Also supported: 3Com 3c980(C)-TX, 3Com 3cSOHO100-TX, 3Com 3c450-TX
1962
1963# PCI Ethernet NICs that use the common MII bus controller code.
1964device		ae		# Attansic/Atheros L2 FastEthernet
1965device		age		# Attansic/Atheros L1 Gigabit Ethernet
1966device		alc		# Atheros AR8131/AR8132 Ethernet
1967device		ale		# Atheros AR8121/AR8113/AR8114 Ethernet
1968device		bce		# Broadcom BCM5706/BCM5708 Gigabit Ethernet
1969device		bfe		# Broadcom BCM440x 10/100 Ethernet
1970device		bge		# Broadcom BCM570xx Gigabit Ethernet
1971device		cas		# Sun Cassini/Cassini+ and NS DP83065 Saturn
1972device		dc		# DEC/Intel 21143 and various workalikes
1973device		et		# Agere ET1310 10/100/Gigabit Ethernet
1974device		fxp		# Intel EtherExpress PRO/100B (82557, 82558)
1975envvar		hint.fxp.0.prefer_iomap="0"
1976device		gem		# Apple GMAC/Sun ERI/Sun GEM
1977device		jme		# JMicron JMC250 Gigabit/JMC260 Fast Ethernet
1978device		lge		# Level 1 LXT1001 gigabit Ethernet
1979device		lio		# Support for Cavium 23XX Ethernet adapters
1980device		mlxfw		# Mellanox firmware update module
1981device		mlx5		# Shared code module between IB and Ethernet
1982device		mlx5en		# Mellanox ConnectX-4 and ConnectX-4 LX
1983device		msk		# Marvell/SysKonnect Yukon II Gigabit Ethernet
1984device		my		# Myson Fast Ethernet (MTD80X, MTD89X)
1985device		nge		# NatSemi DP83820 gigabit Ethernet
1986device		re		# RealTek 8139C+/8169/8169S/8110S
1987device		rl		# RealTek 8129/8139
1988device		sge		# Silicon Integrated Systems SiS190/191
1989device		sis		# Silicon Integrated Systems SiS 900/SiS 7016
1990device		sk		# SysKonnect SK-984x & SK-982x gigabit Ethernet
1991device		ste		# Sundance ST201 (D-Link DFE-550TX)
1992device		stge		# Sundance/Tamarack TC9021 gigabit Ethernet
1993device		vr		# VIA Rhine, Rhine II
1994device		vte		# DM&P Vortex86 RDC R6040 Fast Ethernet
1995device		xl		# 3Com 3c90x (``Boomerang'', ``Cyclone'')
1996
1997# PCI/PCI-X/PCIe Ethernet NICs that use iflib infrastructure
1998device		iflib
1999device		em		# Intel Pro/1000 Gigabit Ethernet
2000device		ix		# Intel Pro/10Gbe PCIE Ethernet
2001device		ixv		# Intel Pro/10Gbe PCIE Ethernet VF
2002
2003# PCI Ethernet NICs.
2004device		cxgb		# Chelsio T3 10 Gigabit Ethernet
2005device		cxgb_t3fw	# Chelsio T3 10 Gigabit Ethernet firmware
2006device		cxgbe		# Chelsio T4-T6 1/10/25/40/100 Gigabit Ethernet
2007device		cxgbev		# Chelsio T4-T6 Virtual Functions
2008device		le		# AMD Am7900 LANCE and Am79C9xx PCnet
2009device		mxge		# Myricom Myri-10G 10GbE NIC
2010device		oce		# Emulex 10 GbE (OneConnect Ethernet)
2011device		ti		# Alteon Networks Tigon I/II gigabit Ethernet
2012
2013# PCI IEEE 802.11 Wireless NICs
2014device		ath		# Atheros pci/cardbus NIC's
2015device		ath_hal		# pci/cardbus chip support
2016#device		ath_ar5210	# AR5210 chips
2017#device		ath_ar5211	# AR5211 chips
2018#device		ath_ar5212	# AR5212 chips
2019#device		ath_rf2413
2020#device		ath_rf2417
2021#device		ath_rf2425
2022#device		ath_rf5111
2023#device		ath_rf5112
2024#device		ath_rf5413
2025#device		ath_ar5416	# AR5416 chips
2026# All of the AR5212 parts have a problem when paired with the AR71xx
2027# CPUS.  These parts have a bug that triggers a fatal bus error on the AR71xx
2028# only.  Details of the exact nature of the bug are sketchy, but some can be
2029# found at https://forum.openwrt.org/viewtopic.php?pid=70060 on pages 4, 5 and
2030# 6.  This option enables this workaround.  There is a performance penalty
2031# for this work around, but without it things don't work at all.  The DMA
2032# from the card usually bursts 128 bytes, but on the affected CPUs, only
2033# 4 are safe.
2034options    	AH_RXCFG_SDMAMW_4BYTES
2035#device		ath_ar9160	# AR9160 chips
2036#device		ath_ar9280	# AR9280 chips
2037#device		ath_ar9285	# AR9285 chips
2038device		ath_rate_sample	# SampleRate tx rate control for ath
2039device		bwi		# Broadcom BCM430* BCM431*
2040device		bwn		# Broadcom BCM43xx
2041device		malo		# Marvell Libertas wireless NICs.
2042device		mwl		# Marvell 88W8363 802.11n wireless NICs.
2043device		mwlfw
2044device		ral		# Ralink Technology RT2500 wireless NICs.
2045device		rtwn		# Realtek wireless NICs
2046device		rtwnfw
2047
2048# Use sf_buf(9) interface for jumbo buffers on ti(4) controllers.
2049#options 	TI_SF_BUF_JUMBO
2050# Turn on the header splitting option for the ti(4) driver firmware.  This
2051# only works for Tigon II chips, and has no effect for Tigon I chips.
2052# This option requires the TI_SF_BUF_JUMBO option above.
2053#options 	TI_JUMBO_HDRSPLIT
2054
2055# These two options allow manipulating the mbuf cluster size and mbuf size,
2056# respectively.  Be very careful with NIC driver modules when changing
2057# these from their default values, because that can potentially cause a
2058# mismatch between the mbuf size assumed by the kernel and the mbuf size
2059# assumed by a module.  The only driver that currently has the ability to
2060# detect a mismatch is ti(4).
2061options 	MCLSHIFT=11	# mbuf cluster shift in bits, 11 == 2KB
2062options 	MSIZE=256	# mbuf size in bytes
2063
2064#
2065# Sound drivers
2066#
2067# sound: The generic sound driver.
2068#
2069
2070device		sound
2071
2072#
2073# snd_*: Device-specific drivers.
2074#
2075# The flags of the device tell the device a bit more info about the
2076# device that normally is obtained through the PnP interface.
2077#	bit  2..0   secondary DMA channel;
2078#	bit  4      set if the board uses two dma channels;
2079#	bit 15..8   board type, overrides autodetection; leave it
2080#		    zero if don't know what to put in (and you don't,
2081#		    since this is unsupported at the moment...).
2082#
2083# snd_als4000:		Avance Logic ALS4000 PCI.
2084# snd_atiixp:		ATI IXP 200/300/400 PCI.
2085# snd_cmi:		CMedia CMI8338/CMI8738 PCI.
2086# snd_cs4281:		Crystal Semiconductor CS4281 PCI.
2087# snd_csa:		Crystal Semiconductor CS461x/428x PCI. (except
2088#			4281)
2089# snd_emu10k1:		Creative EMU10K1 PCI and EMU10K2 (Audigy) PCI.
2090# snd_emu10kx:		Creative SoundBlaster Live! and Audigy
2091# snd_envy24:		VIA Envy24 and compatible, needs snd_spicds.
2092# snd_envy24ht:		VIA Envy24HT and compatible, needs snd_spicds.
2093# snd_es137x:		Ensoniq AudioPCI ES137x PCI.
2094# snd_fm801:		Forte Media FM801 PCI.
2095# snd_hda:		Intel High Definition Audio (Controller) and
2096#			compatible.
2097# snd_hdsp:		RME HDSP 9632 and HDSP 9652
2098# snd_hdspe:		RME HDSPe AIO and RayDAT.
2099# snd_ich:		Intel ICH AC'97 and some more audio controllers
2100#			embedded in a chipset, for example nVidia
2101#			nForce controllers.
2102# snd_maestro3:		ESS Technology Maestro-3/Allegro PCI.
2103# snd_neomagic:		Neomagic 256 AV/ZX PCI.
2104# snd_solo:		ESS Solo-1x PCI.
2105# snd_spicds:		SPI codec driver, needed by Envy24/Envy24HT drivers.
2106# snd_t4dwave:		Trident 4DWave DX/NX PCI, Sis 7018 PCI and Acer Labs
2107#			M5451 PCI.
2108# snd_uaudio:		USB audio.
2109# snd_via8233:		VIA VT8233x PCI.
2110# snd_via82c686:	VIA VT82C686A PCI.
2111# snd_vibes:		S3 Sonicvibes PCI.
2112
2113device		snd_als4000
2114device		snd_atiixp
2115device		snd_cmi
2116device		snd_cs4281
2117device		snd_csa
2118device		snd_emu10k1
2119device		snd_emu10kx
2120device		snd_envy24
2121device		snd_envy24ht
2122device		snd_es137x
2123device		snd_fm801
2124device		snd_hda
2125device		snd_hdsp
2126device		snd_hdspe
2127device		snd_ich
2128device		snd_maestro3
2129device		snd_neomagic
2130device		snd_solo
2131device		snd_spicds
2132device		snd_t4dwave
2133device		snd_uaudio
2134device		snd_via8233
2135device		snd_via82c686
2136device		snd_vibes
2137
2138# For non-PnP sound cards:
2139envvar		hint.pcm.0.at="isa"
2140envvar		hint.pcm.0.irq="10"
2141envvar		hint.pcm.0.drq="1"
2142envvar		hint.pcm.0.flags="0x0"
2143envvar		hint.sbc.0.at="isa"
2144envvar		hint.sbc.0.port="0x220"
2145envvar		hint.sbc.0.irq="5"
2146envvar		hint.sbc.0.drq="1"
2147envvar		hint.sbc.0.flags="0x15"
2148envvar		hint.gusc.0.at="isa"
2149envvar		hint.gusc.0.port="0x220"
2150envvar		hint.gusc.0.irq="5"
2151envvar		hint.gusc.0.drq="1"
2152envvar		hint.gusc.0.flags="0x13"
2153
2154#
2155# Following options are intended for debugging/testing purposes:
2156#
2157# SND_DEBUG                    Enable extra debugging code that includes
2158#                              sanity checking and possible increase of
2159#                              verbosity.
2160#
2161# SND_DIAGNOSTIC               Similar in a spirit of INVARIANTS/DIAGNOSTIC,
2162#                              zero tolerance against inconsistencies.
2163#
2164# SND_FEEDER_MULTIFORMAT       By default, only 16/32 bit feeders are compiled
2165#                              in. This options enable most feeder converters
2166#                              except for 8bit. WARNING: May bloat the kernel.
2167#
2168# SND_FEEDER_FULL_MULTIFORMAT  Ditto, but includes 8bit feeders as well.
2169#
2170# SND_FEEDER_RATE_HP           (feeder_rate) High precision 64bit arithmetic
2171#                              as much as possible (the default trying to
2172#                              avoid it). Possible slowdown.
2173#
2174# SND_PCM_64                   (Only applicable for i386/32bit arch)
2175#                              Process 32bit samples through 64bit
2176#                              integer/arithmetic. Slight increase of dynamic
2177#                              range at a cost of possible slowdown.
2178#
2179# SND_OLDSTEREO                Only 2 channels are allowed, effectively
2180#                              disabling multichannel processing.
2181#
2182options 	SND_DEBUG
2183options 	SND_DIAGNOSTIC
2184options 	SND_FEEDER_MULTIFORMAT
2185options 	SND_FEEDER_FULL_MULTIFORMAT
2186options 	SND_FEEDER_RATE_HP
2187options 	SND_PCM_64
2188options 	SND_OLDSTEREO
2189
2190#
2191# Cardbus
2192#
2193# cbb: pci/CardBus bridge implementing YENTA interface
2194# cardbus: CardBus slots
2195device		cbb
2196device		cardbus
2197
2198#
2199# MMC/SD
2200#
2201# mmc 		MMC/SD bus
2202# mmcsd		MMC/SD memory card
2203# sdhci		Generic PCI SD Host Controller
2204# rtsx		Realtek SD card reader (RTS5209, RTS5227, ...)
2205device		mmc
2206device		mmcsd
2207device		sdhci
2208device		rtsx
2209
2210#
2211# SMB bus
2212#
2213# System Management Bus support is provided by the 'smbus' device.
2214# Access to the SMBus device is via the 'smb' device (/dev/smb*),
2215# which is a child of the 'smbus' device.
2216#
2217# Supported devices:
2218# smb		standard I/O through /dev/smb*
2219#
2220# Supported SMB interfaces:
2221# iicsmb	I2C to SMB bridge with any iicbus interface
2222# intpm		Intel PIIX4 (82371AB, 82443MX) Power Management Unit
2223# alpm		Acer Aladdin-IV/V/Pro2 Power Management Unit
2224# ichsmb	Intel ICH SMBus controller chips (82801AA, 82801AB, 82801BA)
2225# viapm		VIA VT82C586B/596B/686A and VT8233 Power Management Unit
2226# amdpm		AMD 756 Power Management Unit
2227# amdsmb	AMD 8111 SMBus 2.0 Controller
2228# nfpm		NVIDIA nForce Power Management Unit
2229# nfsmb		NVIDIA nForce2/3/4 MCP SMBus 2.0 Controller
2230# ismt		Intel SMBus 2.0 controller chips (on Atom S1200, C2000)
2231#
2232device		smbus		# Bus support, required for smb below.
2233
2234device		intpm
2235options 	ENABLE_ALART	# Control alarm on Intel intpm driver
2236device		alpm
2237device		ichsmb
2238device		viapm
2239device		amdpm
2240device		amdsmb
2241device		nfpm
2242device		nfsmb
2243device		ismt
2244
2245device		smb
2246
2247# SMBus peripheral devices
2248#
2249# jedec_dimm	Asset and temperature reporting for DDR3 and DDR4 DIMMs
2250#
2251device		jedec_dimm
2252
2253# I2C Bus
2254#
2255# Philips i2c bus support is provided by the `iicbus' device.
2256#
2257# Supported devices:
2258# ic	i2c network interface
2259# iic	i2c standard io
2260# iicsmb i2c to smb bridge. Allow i2c i/o with smb commands.
2261# iicoc simple polling driver for OpenCores I2C controller
2262#
2263# Other:
2264# iicbb	generic I2C bit-banging code (needed by lpbb)
2265#
2266device		iicbus		# Bus support, required for ic/iic/iicsmb below.
2267device		iicbb		# bitbang driver; implements i2c on a pair of gpio pins
2268
2269device		ic
2270device		iic		# userland access to i2c slave devices via ioctl(8)
2271device		iicsmb		# smb over i2c bridge
2272device		iicoc		# OpenCores I2C controller support
2273
2274# I2C bus multiplexer (mux) devices
2275device		iicmux		# i2c mux core driver
2276device		iic_gpiomux	# i2c mux hardware controlled via gpio pins
2277device		ltc430x		# LTC4305 and LTC4306 i2c mux chips
2278
2279# I2C peripheral devices
2280#
2281device		ad7418		# Analog Devices temp and voltage sensor
2282device		ads111x		# Texas Instruments ADS101x and ADS111x ADCs
2283device		ds1307		# Dallas DS1307 RTC and compatible
2284device		ds13rtc		# All Dallas/Maxim ds13xx chips
2285device		ds1672		# Dallas DS1672 RTC
2286device		ds3231		# Dallas DS3231 RTC + temperature
2287device		fan53555	# Fairchild Semi FAN53555/SYR82x Regulator
2288device		icee		# AT24Cxxx and compatible EEPROMs
2289device		isl12xx		# Intersil ISL12xx RTC
2290device		lm75		# LM75 compatible temperature sensor
2291device		nxprtc		# NXP RTCs: PCA/PFC212x PCA/PCF85xx
2292device		rtc8583		# Epson RTC-8583
2293device		s35390a		# Seiko Instruments S-35390A RTC
2294device		sy8106a		# Silergy Corp. SY8106A buck regulator
2295
2296# Parallel-Port Bus
2297#
2298# Parallel port bus support is provided by the `ppbus' device.
2299# Multiple devices may be attached to the parallel port, devices
2300# are automatically probed and attached when found.
2301#
2302# Supported devices:
2303# lpt	Parallel Printer
2304# plip	Parallel network interface
2305# ppi	General-purpose I/O ("Geek Port") + IEEE1284 I/O
2306# pps	Pulse per second Timing Interface
2307# lpbb	Philips official parallel port I2C bit-banging interface
2308# pcfclock Parallel port clock driver.
2309#
2310# Supported interfaces:
2311# ppc	ISA-bus parallel port interfaces.
2312#
2313
2314options 	PPC_PROBE_CHIPSET # Enable chipset specific detection
2315				  # (see flags in ppc(4))
2316options 	DEBUG_1284	# IEEE1284 signaling protocol debug
2317options 	PERIPH_1284	# Makes your computer act as an IEEE1284
2318				# compliant peripheral
2319options 	DONTPROBE_1284	# Avoid boot detection of PnP parallel devices
2320options 	LPT_DEBUG	# Printer driver debug
2321options 	PPC_DEBUG	# Parallel chipset level debug
2322options 	PLIP_DEBUG	# Parallel network IP interface debug
2323options 	PCFCLOCK_VERBOSE         # Verbose pcfclock driver
2324options 	PCFCLOCK_MAX_RETRIES=5   # Maximum read tries (default 10)
2325
2326device		ppc
2327envvar		hint.ppc.0.at="isa"
2328envvar		hint.ppc.0.irq="7"
2329device		ppbus
2330device		lpt
2331device		plip
2332device		ppi
2333device		pps
2334device		lpbb
2335device		pcfclock
2336
2337# General Purpose I/O pins
2338device		dwgpio		# Synopsys DesignWare APB GPIO Controller
2339device  	gpio		# gpio interfaces and bus support
2340device  	gpiobacklight	# sysctl control of gpio-based backlight
2341device  	gpioiic		# i2c via gpio bitbang
2342device  	gpiokeys	# kbd(4) glue for gpio-based key input
2343device  	gpioled		# led(4) gpio glue
2344device  	gpiopower	# event handler for gpio-based powerdown
2345device  	gpiopps		# Pulse per second input from gpio pin
2346device  	gpioregulator	# extres/regulator glue for gpio pin
2347device  	gpiospi		# SPI via gpio bitbang
2348device  	gpioths		# 1-wire temp/humidity sensor on gpio pin
2349
2350# Pulse width modulation
2351device  	pwmbus		# pwm interface and bus support
2352device  	pwmc		# userland control access to pwm outputs
2353
2354#
2355# Etherswitch framework and drivers
2356#
2357# etherswitch	The etherswitch(4) framework
2358# miiproxy	Proxy device for miibus(4) functionality
2359#
2360# Switch hardware support:
2361# arswitch	Atheros switches
2362# ip17x 	IC+ 17x family switches
2363# rtl8366r	Realtek RTL8366 switches
2364# ukswitch	Multi-PHY switches
2365#
2366device		etherswitch
2367device		miiproxy
2368device		arswitch
2369device		ip17x
2370device		rtl8366rb
2371device		ukswitch
2372
2373# Kernel BOOTP support
2374
2375options 	BOOTP		# Use BOOTP to obtain IP address/hostname
2376				# Requires NFSCL and NFS_ROOT
2377options 	BOOTP_NFSROOT	# NFS mount root filesystem using BOOTP info
2378options 	BOOTP_NFSV3	# Use NFS v3 to NFS mount root
2379options 	BOOTP_COMPAT	# Workaround for broken bootp daemons.
2380options 	BOOTP_WIRED_TO=fxp0 # Use interface fxp0 for BOOTP
2381options 	BOOTP_BLOCKSIZE=8192 # Override NFS block size
2382
2383#
2384# Enable software watchdog routines, even if hardware watchdog is present.
2385# By default, software watchdog timer is enabled only if no hardware watchdog
2386# is present.
2387#
2388options 	SW_WATCHDOG
2389
2390#
2391# Add the software deadlock resolver thread.
2392#
2393options 	DEADLKRES
2394
2395# Set the number of sf_bufs to allocate. sf_bufs are virtual buffers
2396# for sendfile(2) that are used to map file VM pages, and normally
2397# default to a quantity that is roughly 16*MAXUSERS+512. You would
2398# typically want about 4 of these for each simultaneous file send.
2399#
2400options 	NSFBUFS=1024
2401
2402#
2403# Enable extra debugging code for locks.  This stores the filename and
2404# line of whatever acquired the lock in the lock itself, and changes a
2405# number of function calls to pass around the relevant data.  This is
2406# not at all useful unless you are debugging lock code.  Note that
2407# modules should be recompiled as this option modifies KBI.
2408#
2409options 	DEBUG_LOCKS
2410
2411#
2412# VirtIO support
2413#
2414# The virtio entry provides a generic bus for use by the device drivers.
2415# It must be combined with an interface that communicates with the host.
2416# Multiple such interfaces are defined by the VirtIO specification
2417# including PCI and MMIO.
2418#
2419device		virtio		# Generic VirtIO bus (required)
2420device		virtio_mmio	# VirtIO MMIO Interface
2421device		virtio_pci	# VirtIO PCI Interface
2422device		vtnet		# VirtIO Ethernet device
2423device		virtio_balloon	# VirtIO Memory Balloon device
2424device		virtio_blk	# VirtIO Block device
2425device		virtio_console	# VirtIO Console device
2426device		virtio_gpu	# VirtIO GPU device
2427device		virtio_random	# VirtIO Entropy device
2428device		virtio_scmi	# VirtIO SCMI device
2429device		virtio_scsi	# VirtIO SCSI device
2430
2431#####################################################################
2432# HID support
2433device		hid		# Generic HID support
2434options 	HID_DEBUG	# enable debug msgs
2435device		hidbus		# HID bus
2436device		hidmap		# HID to evdev mapping
2437device		hidraw		# Raw access driver
2438options 	HIDRAW_MAKE_UHID_ALIAS	# install /dev/uhid alias
2439device		hconf		# Multitouch configuration TLC
2440device		hcons		# Consumer controls
2441device		hgame		# Generic game controllers
2442device		hkbd		# HID keyboard
2443device		hms		# HID mouse
2444device		hmt		# HID multitouch (MS-compatible)
2445device		hpen		# Generic pen driver
2446device		hsctrl		# System controls
2447device		ps4dshock	# Sony PS4 DualShock 4 gamepad driver
2448device		xb360gp		# XBox 360 gamepad driver
2449
2450#####################################################################
2451# USB support
2452# UHCI controller
2453device		uhci
2454# OHCI controller
2455device		ohci
2456# EHCI controller
2457device		ehci
2458# XHCI controller
2459device		xhci
2460# SL811 Controller
2461#device		slhci
2462# General USB code (mandatory for USB)
2463device		usb
2464#
2465# USB Double Bulk Pipe devices
2466device		udbp
2467# USB temperature meter
2468device		ugold
2469# USB LED
2470device		uled
2471# Human Interface Device (anything with buttons and dials)
2472device		uhid
2473# USB keyboard
2474device		ukbd
2475# USB printer
2476device		ulpt
2477# USB mass storage driver (Requires scbus and da)
2478device		umass
2479# USB mass storage driver for device-side mode
2480device		usfs
2481# USB support for Belkin F5U109 and Magic Control Technology serial adapters
2482device		umct
2483# USB modem support
2484device		umodem
2485# USB mouse
2486device		ums
2487# USB touchpad(s)
2488device		atp
2489device		wsp
2490# eGalax USB touch screen
2491device		uep
2492# Diamond Rio 500 MP3 player
2493device		urio
2494# HID-over-USB driver
2495device		usbhid
2496
2497#
2498# USB serial support
2499device		ucom
2500# USB support for 3G modem cards by Option, Novatel, Huawei and Sierra
2501device		u3g
2502# USB support for Technologies ARK3116 based serial adapters
2503device		uark
2504# USB support for Belkin F5U103 and compatible serial adapters
2505device		ubsa
2506# USB support for serial adapters based on the FT8U100AX and FT8U232AM
2507device		uftdi
2508# USB support for some Windows CE based serial communication.
2509device		uipaq
2510# USB support for Prolific PL-2303 serial adapters
2511device		uplcom
2512# USB support for Silicon Laboratories CP2101/CP2102 based USB serial adapters
2513device		uslcom
2514# USB Visor and Palm devices
2515device		uvisor
2516# USB serial support for DDI pocket's PHS
2517device		uvscom
2518#
2519# USB ethernet support
2520device		uether
2521# ADMtek USB ethernet. Supports the LinkSys USB100TX,
2522# the Billionton USB100, the Melco LU-ATX, the D-Link DSB-650TX
2523# and the SMC 2202USB. Also works with the ADMtek AN986 Pegasus
2524# eval board.
2525device		aue
2526
2527# ASIX Electronics AX88172 USB 2.0 ethernet driver. Used in the
2528# LinkSys USB200M and various other adapters.
2529device		axe
2530# ASIX Electronics AX88178A/AX88179 USB 2.0/3.0 gigabit ethernet driver.
2531device		axge
2532
2533#
2534# Devices which communicate using Ethernet over USB, particularly
2535# Communication Device Class (CDC) Ethernet specification. Supports
2536# Sharp Zaurus PDAs, some DOCSIS cable modems and so on.
2537device		cdce
2538#
2539# CATC USB-EL1201A USB ethernet. Supports the CATC Netmate
2540# and Netmate II, and the Belkin F5U111.
2541device		cue
2542#
2543# Kawasaki LSI ethernet. Supports the LinkSys USB10T,
2544# Entrega USB-NET-E45, Peracom Ethernet Adapter, the
2545# 3Com 3c19250, the ADS Technologies USB-10BT, the ATen UC10T,
2546# the Netgear EA101, the D-Link DSB-650, the SMC 2102USB
2547# and 2104USB, and the Corega USB-T.
2548device		kue
2549#
2550# RealTek RTL8150 USB to fast ethernet. Supports the Melco LUA-KTX
2551# and the GREEN HOUSE GH-USB100B.
2552device		rue
2553#
2554# Davicom DM9601E USB to fast ethernet. Supports the Corega FEther USB-TXC.
2555device		udav
2556#
2557# RealTek RTL8152/RTL8153 USB Ethernet driver
2558device		ure
2559#
2560# Moschip MCS7730/MCS7840 USB to fast ethernet. Supports the Sitecom LN030.
2561device		mos
2562#
2563# HSxPA devices from Option N.V
2564device		uhso
2565
2566# Realtek RTL8188SU/RTL8191SU/RTL8192SU wireless driver
2567device		rsu
2568#
2569# Ralink Technology RT2501USB/RT2601USB wireless driver
2570device		rum
2571# Ralink Technology RT2700U/RT2800U/RT3000U wireless driver
2572device		run
2573#
2574# Atheros AR5523 wireless driver
2575device		uath
2576#
2577# Conexant/Intersil PrismGT wireless driver
2578device		upgt
2579#
2580# Ralink Technology RT2500USB wireless driver
2581device		ural
2582#
2583# RNDIS USB ethernet driver
2584device		urndis
2585# Realtek RTL8187B/L wireless driver
2586device		urtw
2587#
2588# ZyDas ZD1211/ZD1211B wireless driver
2589device		zyd
2590#
2591# Sierra USB wireless driver
2592device		usie
2593
2594#
2595# debugging options for the USB subsystem
2596#
2597options 	USB_DEBUG
2598options 	U3G_DEBUG
2599
2600# options for ukbd:
2601options 	UKBD_DFLT_KEYMAP	# specify the built-in keymap
2602makeoptions	UKBD_DFLT_KEYMAP=jp.106
2603
2604# options for uplcom:
2605options 	UPLCOM_INTR_INTERVAL=100	# interrupt pipe interval
2606						# in milliseconds
2607
2608# options for uvscom:
2609options 	UVSCOM_DEFAULT_OPKTSIZE=8	# default output packet size
2610options 	UVSCOM_INTR_INTERVAL=100	# interrupt pipe interval
2611						# in milliseconds
2612
2613#####################################################################
2614# FireWire support
2615
2616device		firewire	# FireWire bus code
2617device		sbp		# SCSI over Firewire (Requires scbus and da)
2618device		sbp_targ	# SBP-2 Target mode  (Requires scbus and targ)
2619device		fwe		# Ethernet over FireWire (non-standard!)
2620device		fwip		# IP over FireWire (RFC2734 and RFC3146)
2621
2622#####################################################################
2623# dcons support (Dumb Console Device)
2624
2625device		dcons			# dumb console driver
2626device		dcons_crom		# FireWire attachment
2627options 	DCONS_BUF_SIZE=16384	# buffer size
2628options 	DCONS_POLL_HZ=100	# polling rate
2629options 	DCONS_FORCE_CONSOLE=0	# force to be the primary console
2630options 	DCONS_FORCE_GDB=1	# force to be the gdb device
2631
2632#####################################################################
2633# crypto subsystem
2634#
2635# This is a port of the OpenBSD crypto framework.  Include this when
2636# configuring IPSEC and when you have a h/w crypto device to accelerate
2637# user applications that link to OpenSSL.
2638#
2639# Drivers are ports from OpenBSD with some simple enhancements that have
2640# been fed back to OpenBSD.
2641
2642device		crypto		# core crypto support
2643
2644# Only install the cryptodev device if you are running tests, or know
2645# specifically why you need it.  In most cases, it is not needed and
2646# will make things slower.
2647device		cryptodev	# /dev/crypto for access to h/w
2648
2649device		rndtest		# FIPS 140-2 entropy tester
2650
2651device		ccr		# Chelsio T6
2652
2653device		hifn		# Hifn 7951, 7781, etc.
2654options 	HIFN_DEBUG	# enable debugging support: hw.hifn.debug
2655options 	HIFN_RNDTEST	# enable rndtest support
2656
2657device		safe		# SafeNet 1141
2658options 	SAFE_DEBUG	# enable debugging support: hw.safe.debug
2659options 	SAFE_RNDTEST	# enable rndtest support
2660
2661#####################################################################
2662
2663
2664#
2665# Embedded system options:
2666#
2667# An embedded system might want to run something other than init.
2668options 	INIT_PATH=/sbin/init:/rescue/init
2669
2670# Debug options
2671options 	BUS_DEBUG	# enable newbus debugging
2672options 	DEBUG_VFS_LOCKS	# enable VFS lock debugging
2673options 	SOCKBUF_DEBUG	# enable sockbuf last record/mb tail checking
2674options 	IFMEDIA_DEBUG	# enable debugging in net/if_media.c
2675
2676#
2677# Verbose SYSINIT
2678#
2679# Make the SYSINIT process performed by mi_startup() verbose.  This is very
2680# useful when porting to a new architecture.  If DDB is also enabled, this
2681# will print function names instead of addresses.  If defined with a value
2682# of zero, the verbose code is compiled-in but disabled by default, and can
2683# be enabled with the debug.verbose_sysinit=1 tunable.
2684options 	VERBOSE_SYSINIT
2685
2686#####################################################################
2687# SYSV IPC KERNEL PARAMETERS
2688#
2689# Maximum number of System V semaphores that can be used on the system at
2690# one time.
2691options 	SEMMNI=11
2692
2693# Total number of semaphores system wide
2694options 	SEMMNS=61
2695
2696# Total number of undo structures in system
2697options 	SEMMNU=31
2698
2699# Maximum number of System V semaphores that can be used by a single process
2700# at one time.
2701options 	SEMMSL=61
2702
2703# Maximum number of operations that can be outstanding on a single System V
2704# semaphore at one time.
2705options 	SEMOPM=101
2706
2707# Maximum number of undo operations that can be outstanding on a single
2708# System V semaphore at one time.
2709options 	SEMUME=11
2710
2711# Maximum number of shared memory pages system wide.
2712options 	SHMALL=1025
2713
2714# Maximum size, in bytes, of a single System V shared memory region.
2715options 	SHMMAX=(SHMMAXPGS*PAGE_SIZE+1)
2716options 	SHMMAXPGS=1025
2717
2718# Minimum size, in bytes, of a single System V shared memory region.
2719options 	SHMMIN=2
2720
2721# Maximum number of shared memory regions that can be used on the system
2722# at one time.
2723options 	SHMMNI=33
2724
2725# Maximum number of System V shared memory regions that can be attached to
2726# a single process at one time.
2727options 	SHMSEG=9
2728
2729# Set the amount of time (in seconds) the system will wait before
2730# rebooting automatically when a kernel panic occurs.  If set to (-1),
2731# the system will wait indefinitely until a key is pressed on the
2732# console.
2733options 	PANIC_REBOOT_WAIT_TIME=16
2734
2735# Attempt to bypass the buffer cache and put data directly into the
2736# userland buffer for read operation when O_DIRECT flag is set on the
2737# file.  Both offset and length of the read operation must be
2738# multiples of the physical media sector size.
2739#
2740options 	DIRECTIO
2741
2742# Specify a lower limit for the number of swap I/O buffers.  They are
2743# (among other things) used when bypassing the buffer cache due to
2744# DIRECTIO kernel option enabled and O_DIRECT flag set on file.
2745#
2746options 	NSWBUF_MIN=120
2747
2748#####################################################################
2749
2750# More undocumented options for linting.
2751# Note that documenting these is not considered an affront.
2752
2753options 	CAM_DEBUG_DELAY
2754
2755options 	DEBUG
2756
2757# Kernel filelock debugging.
2758options 	LOCKF_DEBUG
2759
2760# System V compatible message queues
2761# Please note that the values provided here are used to test kernel
2762# building.  The defaults in the sources provide almost the same numbers.
2763# MSGSSZ must be a power of 2 between 8 and 1024.
2764options 	MSGMNB=2049	# Max number of chars in queue
2765options 	MSGMNI=41	# Max number of message queue identifiers
2766options 	MSGSEG=2049	# Max number of message segments
2767options 	MSGSSZ=16	# Size of a message segment
2768options 	MSGTQL=41	# Max number of messages in system
2769
2770options 	NBUF=512	# Number of buffer headers
2771
2772options 	SC_DEBUG_LEVEL=5	# Syscons debug level
2773options 	SC_RENDER_DEBUG	# syscons rendering debugging
2774
2775options 	VFS_BIO_DEBUG	# VFS buffer I/O debugging
2776
2777options 	KSTACK_MAX_PAGES=32 # Maximum pages to give the kernel stack
2778options 	KSTACK_USAGE_PROF
2779
2780# Adaptec Array Controller driver options
2781options 	AAC_DEBUG	# Debugging levels:
2782				# 0 - quiet, only emit warnings
2783				# 1 - noisy, emit major function
2784				#     points and things done
2785				# 2 - extremely noisy, emit trace
2786				#     items in loops, etc.
2787
2788# Resource Accounting
2789options 	RACCT
2790
2791# Resource Limits
2792options 	RCTL
2793
2794# Yet more undocumented options for linting.
2795options 	MAXFILES=999
2796
2797# Random number generator
2798# Alternative algorithm.
2799#options 	RANDOM_FENESTRASX
2800# Allow the CSPRNG algorithm to be loaded as a module.
2801#options 	RANDOM_LOADABLE
2802# Select this to allow high-rate but potentially expensive
2803# harvesting of Slab-Allocator entropy. In very high-rate
2804# situations the value of doing this is dubious at best.
2805options 	RANDOM_ENABLE_UMA	# slab allocator
2806
2807# Select this to allow high-rate but potentially expensive
2808# harvesting of the m_next pointer in the mbuf. Note that
2809# the m_next pointer is NULL except when receiving > 4K
2810# jumbo frames or sustained bursts by way of LRO. Thus in
2811# the common case it is stirring zero in to the entropy
2812# pool. In cases where it is not NULL it is pointing to one
2813# of a small (in the thousands to 10s of thousands) number
2814# of 256 byte aligned mbufs. Hence it is, even in the best
2815# case, a poor source of entropy. And in the absence of actual
2816# runtime analysis of entropy collection may mislead the user in
2817# to believe that substantially more entropy is being collected
2818# than in fact is - leading to a different class of security
2819# risk. In high packet rate situations ethernet entropy
2820# collection is also very expensive, possibly leading to as
2821# much as a 50% drop in packets received.
2822# This option is present to maintain backwards compatibility
2823# if desired, however it cannot be recommended for use in any
2824# environment.
2825options 	RANDOM_ENABLE_ETHER	# ether_input
2826
2827# Module to enable execution of application via emulators like QEMU
2828options         IMGACT_BINMISC
2829
2830# zlib I/O stream support
2831# This enables support for compressed core dumps.
2832options 	GZIO
2833
2834# zstd support
2835# This enables support for Zstd compressed core dumps, GEOM_UZIP images,
2836# and is required by zfs if statically linked.
2837options 	ZSTDIO
2838
2839# BHND(4) drivers
2840options 	BHND_LOGLEVEL	# Logging threshold level
2841
2842# evdev interface
2843device		evdev		# input event device support
2844options 	EVDEV_SUPPORT	# evdev support in legacy drivers
2845options 	EVDEV_DEBUG	# enable event debug msgs
2846device		uinput		# install /dev/uinput cdev
2847options 	UINPUT_DEBUG	# enable uinput debug msgs
2848
2849# Encrypted kernel crash dumps.
2850options 	EKCD
2851
2852# Serial Peripheral Interface (SPI) support.
2853device		spibus		# Bus support.
2854device		at45d		# DataFlash driver
2855device		cqspi		#
2856device		mx25l		# SPIFlash driver
2857device		n25q		#
2858device		spigen		# Generic access to SPI devices from userland.
2859# Enable legacy /dev/spigenN name aliases for /dev/spigenX.Y devices.
2860options 	SPIGEN_LEGACY_CDEVNAME # legacy device names for spigen
2861
2862# Compression supports.
2863device		zlib		# gzip/zlib compression/decompression library
2864device		xz		# xz_embedded LZMA de-compression library
2865
2866# Kernel support for stats(3).
2867options 	STATS
2868
2869# File system monitoring
2870device		filemon		# file monitoring for make(1) meta-mode
2871