The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/conf/NOTES

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    1 # $FreeBSD$
    2 #
    3 # NOTES -- Lines that can be cut/pasted into kernel and hints configs.
    4 #
    5 # Lines that begin with 'device', 'options', 'machine', 'ident', 'maxusers',
    6 # 'makeoptions', 'hints', etc. go into the kernel configuration that you
    7 # run config(8) with.
    8 #
    9 # Lines that begin with 'hint.' are NOT for config(8), they go into your
   10 # hints file.  See /boot/device.hints and/or the 'hints' config(8) directive.
   11 #
   12 # Please use ``make LINT'' to create an old-style LINT file if you want to
   13 # do kernel test-builds.
   14 #
   15 # This file contains machine independent kernel configuration notes.  For
   16 # machine dependent notes, look in /sys/<arch>/conf/NOTES.
   17 #
   18 
   19 #
   20 # NOTES conventions and style guide:
   21 #
   22 # Large block comments should begin and end with a line containing only a
   23 # comment character.
   24 #
   25 # To describe a particular object, a block comment (if it exists) should
   26 # come first.  Next should come device, options, and hints lines in that
   27 # order.  All device and option lines must be described by a comment that
   28 # doesn't just expand the device or option name.  Use only a concise
   29 # comment on the same line if possible.  Very detailed descriptions of
   30 # devices and subsystems belong in man pages.
   31 #
   32 # A space followed by a tab separates 'options' from an option name.  Two
   33 # spaces followed by a tab separate 'device' from a device name.  Comments
   34 # after an option or device should use one space after the comment character.
   35 # To comment out a negative option that disables code and thus should not be
   36 # enabled for LINT builds, precede 'options' with "#!".
   37 #
   38 
   39 #
   40 # This is the ``identification'' of the kernel.  Usually this should
   41 # be the same as the name of your kernel.
   42 #
   43 ident           LINT
   44 
   45 #
   46 # The `maxusers' parameter controls the static sizing of a number of
   47 # internal system tables by a formula defined in subr_param.c.
   48 # Omitting this parameter or setting it to 0 will cause the system to
   49 # auto-size based on physical memory.
   50 #
   51 maxusers        10
   52 
   53 # To statically compile in device wiring instead of /boot/device.hints
   54 #hints          "LINT.hints"            # Default places to look for devices.
   55 
   56 # Use the following to compile in values accessible to the kernel
   57 # through getenv() (or kenv(1) in userland). The format of the file
   58 # is 'variable=value', see kenv(1)
   59 #
   60 #env            "LINT.env"
   61 
   62 #
   63 # The `makeoptions' parameter allows variables to be passed to the
   64 # generated Makefile in the build area.
   65 #
   66 # CONF_CFLAGS gives some extra compiler flags that are added to ${CFLAGS}
   67 # after most other flags.  Here we use it to inhibit use of non-optimal
   68 # gcc built-in functions (e.g., memcmp).
   69 #
   70 # DEBUG happens to be magic.
   71 # The following is equivalent to 'config -g KERNELNAME' and creates
   72 # 'kernel.debug' compiled with -g debugging as well as a normal
   73 # 'kernel'.  Use 'make install.debug' to install the debug kernel
   74 # but that isn't normally necessary as the debug symbols are not loaded
   75 # by the kernel and are not useful there anyway.
   76 #
   77 # KERNEL can be overridden so that you can change the default name of your
   78 # kernel.
   79 #
   80 # MODULES_OVERRIDE can be used to limit modules built to a specific list.
   81 #
   82 makeoptions     CONF_CFLAGS=-fno-builtin  #Don't allow use of memcmp, etc.
   83 #makeoptions    DEBUG=-g                #Build kernel with gdb(1) debug symbols
   84 #makeoptions    KERNEL=foo              #Build kernel "foo" and install "/foo"
   85 # Only build ext2fs module plus those parts of the sound system I need.
   86 #makeoptions    MODULES_OVERRIDE="ext2fs sound/sound sound/driver/maestro3"
   87 makeoptions     DESTDIR=/tmp
   88 
   89 #
   90 # FreeBSD processes are subject to certain limits to their consumption
   91 # of system resources.  See getrlimit(2) for more details.  Each
   92 # resource limit has two values, a "soft" limit and a "hard" limit.
   93 # The soft limits can be modified during normal system operation, but
   94 # the hard limits are set at boot time.  Their default values are
   95 # in sys/<arch>/include/vmparam.h.  There are two ways to change them:
   96 # 
   97 # 1.  Set the values at kernel build time.  The options below are one
   98 #     way to allow that limit to grow to 1GB.  They can be increased
   99 #     further by changing the parameters:
  100 #       
  101 # 2.  In /boot/loader.conf, set the tunables kern.maxswzone,
  102 #     kern.maxbcache, kern.maxtsiz, kern.dfldsiz, kern.maxdsiz,
  103 #     kern.dflssiz, kern.maxssiz and kern.sgrowsiz.
  104 #
  105 # The options in /boot/loader.conf override anything in the kernel
  106 # configuration file.  See the function init_param1 in
  107 # sys/kern/subr_param.c for more details.
  108 #
  109 
  110 options         MAXDSIZ=(1024UL*1024*1024)
  111 options         MAXSSIZ=(128UL*1024*1024)
  112 options         DFLDSIZ=(1024UL*1024*1024)
  113 
  114 #
  115 # BLKDEV_IOSIZE sets the default block size used in user block
  116 # device I/O.  Note that this value will be overridden by the label
  117 # when specifying a block device from a label with a non-0
  118 # partition blocksize.  The default is PAGE_SIZE.
  119 #
  120 options         BLKDEV_IOSIZE=8192
  121 
  122 #
  123 # MAXPHYS and DFLTPHYS
  124 #
  125 # These are the maximal and safe 'raw' I/O block device access sizes.
  126 # Reads and writes will be split into MAXPHYS chunks for known good
  127 # devices and DFLTPHYS for the rest. Some applications have better
  128 # performance with larger raw I/O access sizes. Note that certain VM
  129 # parameters are derived from these values and making them too large
  130 # can make an an unbootable kernel.
  131 #
  132 # The defaults are 64K and 128K respectively.
  133 options         DFLTPHYS=(64*1024)
  134 options         MAXPHYS=(128*1024)
  135 
  136 
  137 # This allows you to actually store this configuration file into
  138 # the kernel binary itself. See config(8) for more details.
  139 #
  140 options         INCLUDE_CONFIG_FILE     # Include this file in kernel
  141 
  142 #
  143 # Compile-time defaults for various boot parameters
  144 #
  145 options         BOOTVERBOSE=1
  146 options         BOOTHOWTO=RB_MULTIPLE
  147 
  148 options         GEOM_AES                # Don't use, use GEOM_BDE
  149 options         GEOM_BDE                # Disk encryption.
  150 options         GEOM_BSD                # BSD disklabels
  151 options         GEOM_CACHE              # Disk cache.
  152 options         GEOM_CONCAT             # Disk concatenation.
  153 options         GEOM_ELI                # Disk encryption.
  154 options         GEOM_FOX                # Redundant path mitigation
  155 options         GEOM_GATE               # Userland services.
  156 options         GEOM_JOURNAL            # Journaling.
  157 options         GEOM_LABEL              # Providers labelization.
  158 options         GEOM_LINUX_LVM          # Linux LVM2 volumes
  159 options         GEOM_MAP                # Map based partitioning
  160 options         GEOM_MBR                # DOS/MBR partitioning
  161 options         GEOM_MIRROR             # Disk mirroring.
  162 options         GEOM_MULTIPATH          # Disk multipath
  163 options         GEOM_NOP                # Test class.
  164 options         GEOM_PART_APM           # Apple partitioning
  165 options         GEOM_PART_BSD           # BSD disklabel
  166 options         GEOM_PART_BSD64         # BSD disklabel64
  167 options         GEOM_PART_EBR           # Extended Boot Records
  168 options         GEOM_PART_EBR_COMPAT    # Backward compatible partition names
  169 options         GEOM_PART_GPT           # GPT partitioning
  170 options         GEOM_PART_LDM           # Logical Disk Manager
  171 options         GEOM_PART_MBR           # MBR partitioning
  172 options         GEOM_PART_PC98          # PC-9800 disk partitioning
  173 options         GEOM_PART_VTOC8         # SMI VTOC8 disk label
  174 options         GEOM_PC98               # NEC PC9800 partitioning
  175 options         GEOM_RAID               # Soft RAID functionality.
  176 options         GEOM_RAID3              # RAID3 functionality.
  177 options         GEOM_SHSEC              # Shared secret.
  178 options         GEOM_STRIPE             # Disk striping.
  179 options         GEOM_SUNLABEL           # Sun/Solaris partitioning
  180 options         GEOM_UNCOMPRESS         # Read-only compressed disks (lzma, zip)
  181 options         GEOM_UZIP               # Read-only compressed disks
  182 options         GEOM_VINUM              # Vinum logical volume manager
  183 options         GEOM_VIRSTOR            # Virtual storage.
  184 options         GEOM_VOL                # Volume names from UFS superblock
  185 options         GEOM_ZERO               # Performance testing helper.
  186 
  187 #
  188 # The root device and filesystem type can be compiled in;
  189 # this provides a fallback option if the root device cannot
  190 # be correctly guessed by the bootstrap code, or an override if
  191 # the RB_DFLTROOT flag (-r) is specified when booting the kernel.
  192 #
  193 options         ROOTDEVNAME=\"ufs:da0s2e\"
  194 
  195 
  196 #####################################################################
  197 # Scheduler options:
  198 #
  199 # Specifying one of SCHED_4BSD or SCHED_ULE is mandatory.  These options
  200 # select which scheduler is compiled in.
  201 #
  202 # SCHED_4BSD is the historical, proven, BSD scheduler.  It has a global run
  203 # queue and no CPU affinity which makes it suboptimal for SMP.  It has very
  204 # good interactivity and priority selection.
  205 #
  206 # SCHED_ULE provides significant performance advantages over 4BSD on many
  207 # workloads on SMP machines.  It supports cpu-affinity, per-cpu runqueues
  208 # and scheduler locks.  It also has a stronger notion of interactivity 
  209 # which leads to better responsiveness even on uniprocessor machines.  This
  210 # is the default scheduler.
  211 #
  212 # SCHED_STATS is a debugging option which keeps some stats in the sysctl
  213 # tree at 'kern.sched.stats' and is useful for debugging scheduling decisions.
  214 #
  215 options         SCHED_4BSD
  216 options         SCHED_STATS
  217 #options        SCHED_ULE
  218 
  219 #####################################################################
  220 # SMP OPTIONS:
  221 #
  222 # SMP enables building of a Symmetric MultiProcessor Kernel.
  223 
  224 # Mandatory:
  225 options         SMP                     # Symmetric MultiProcessor Kernel
  226 
  227 # MAXCPU defines the maximum number of CPUs that can boot in the system.
  228 # A default value should be already present, for every architecture.
  229 options         MAXCPU=32
  230 
  231 # MAXMEMDOM defines the maximum number of memory domains that can boot in the
  232 # system.  A default value should already be defined by every architecture.
  233 options         MAXMEMDOM=1
  234 
  235 # ADAPTIVE_MUTEXES changes the behavior of blocking mutexes to spin
  236 # if the thread that currently owns the mutex is executing on another
  237 # CPU.  This behavior is enabled by default, so this option can be used
  238 # to disable it.
  239 options         NO_ADAPTIVE_MUTEXES
  240 
  241 # ADAPTIVE_RWLOCKS changes the behavior of reader/writer locks to spin
  242 # if the thread that currently owns the rwlock is executing on another
  243 # CPU.  This behavior is enabled by default, so this option can be used
  244 # to disable it.
  245 options         NO_ADAPTIVE_RWLOCKS
  246 
  247 # ADAPTIVE_SX changes the behavior of sx locks to spin if the thread that
  248 # currently owns the sx lock is executing on another CPU.
  249 # This behavior is enabled by default, so this option can be used to
  250 # disable it.
  251 options         NO_ADAPTIVE_SX
  252 
  253 # MUTEX_NOINLINE forces mutex operations to call functions to perform each
  254 # operation rather than inlining the simple cases.  This can be used to
  255 # shrink the size of the kernel text segment.  Note that this behavior is
  256 # already implied by the INVARIANT_SUPPORT, INVARIANTS, KTR, LOCK_PROFILING,
  257 # and WITNESS options.
  258 options         MUTEX_NOINLINE
  259 
  260 # RWLOCK_NOINLINE forces rwlock operations to call functions to perform each
  261 # operation rather than inlining the simple cases.  This can be used to
  262 # shrink the size of the kernel text segment.  Note that this behavior is
  263 # already implied by the INVARIANT_SUPPORT, INVARIANTS, KTR, LOCK_PROFILING,
  264 # and WITNESS options.
  265 options         RWLOCK_NOINLINE
  266 
  267 # SX_NOINLINE forces sx lock operations to call functions to perform each
  268 # operation rather than inlining the simple cases.  This can be used to
  269 # shrink the size of the kernel text segment.  Note that this behavior is
  270 # already implied by the INVARIANT_SUPPORT, INVARIANTS, KTR, LOCK_PROFILING,
  271 # and WITNESS options.
  272 options         SX_NOINLINE
  273 
  274 # SMP Debugging Options:
  275 #
  276 # CALLOUT_PROFILING enables rudimentary profiling of the callwheel data
  277 #         structure used as backend in callout(9).
  278 # PREEMPTION allows the threads that are in the kernel to be preempted by
  279 #         higher priority [interrupt] threads.  It helps with interactivity
  280 #         and allows interrupt threads to run sooner rather than waiting.
  281 #         WARNING! Only tested on amd64 and i386.
  282 # FULL_PREEMPTION instructs the kernel to preempt non-realtime kernel
  283 #         threads.  Its sole use is to expose race conditions and other
  284 #         bugs during development.  Enabling this option will reduce
  285 #         performance and increase the frequency of kernel panics by
  286 #         design.  If you aren't sure that you need it then you don't.
  287 #         Relies on the PREEMPTION option.  DON'T TURN THIS ON.
  288 # MUTEX_DEBUG enables various extra assertions in the mutex code.
  289 # SLEEPQUEUE_PROFILING enables rudimentary profiling of the hash table
  290 #         used to hold active sleep queues as well as sleep wait message
  291 #         frequency.
  292 # TURNSTILE_PROFILING enables rudimentary profiling of the hash table
  293 #         used to hold active lock queues.
  294 # UMTX_PROFILING enables rudimentary profiling of the hash table used 
  295 #         to hold active lock queues.
  296 # WITNESS enables the witness code which detects deadlocks and cycles
  297 #         during locking operations.
  298 # WITNESS_KDB causes the witness code to drop into the kernel debugger if
  299 #         a lock hierarchy violation occurs or if locks are held when going to
  300 #         sleep.
  301 # WITNESS_SKIPSPIN disables the witness checks on spin mutexes.
  302 options         PREEMPTION
  303 options         FULL_PREEMPTION
  304 options         MUTEX_DEBUG
  305 options         WITNESS
  306 options         WITNESS_KDB
  307 options         WITNESS_SKIPSPIN
  308 
  309 # LOCK_PROFILING - Profiling locks.  See LOCK_PROFILING(9) for details.
  310 options         LOCK_PROFILING
  311 # Set the number of buffers and the hash size.  The hash size MUST be larger
  312 # than the number of buffers.  Hash size should be prime.
  313 options         MPROF_BUFFERS="1536"
  314 options         MPROF_HASH_SIZE="1543"
  315 
  316 # Profiling for the callout(9) backend.
  317 options         CALLOUT_PROFILING
  318 
  319 # Profiling for internal hash tables.
  320 options         SLEEPQUEUE_PROFILING
  321 options         TURNSTILE_PROFILING
  322 options         UMTX_PROFILING
  323 
  324 
  325 #####################################################################
  326 # COMPATIBILITY OPTIONS
  327 
  328 #
  329 # Implement system calls compatible with 4.3BSD and older versions of
  330 # FreeBSD.  You probably do NOT want to remove this as much current code
  331 # still relies on the 4.3 emulation.  Note that some architectures that
  332 # are supported by FreeBSD do not include support for certain important
  333 # aspects of this compatibility option, namely those related to the
  334 # signal delivery mechanism.
  335 #
  336 options         COMPAT_43
  337 
  338 # Old tty interface.
  339 options         COMPAT_43TTY
  340 
  341 # Note that as a general rule, COMPAT_FREEBSD<n> depends on
  342 # COMPAT_FREEBSD<n+1>, COMPAT_FREEBSD<n+2>, etc.
  343 
  344 # Enable FreeBSD4 compatibility syscalls
  345 options         COMPAT_FREEBSD4
  346 
  347 # Enable FreeBSD5 compatibility syscalls
  348 options         COMPAT_FREEBSD5
  349 
  350 # Enable FreeBSD6 compatibility syscalls
  351 options         COMPAT_FREEBSD6
  352 
  353 # Enable FreeBSD7 compatibility syscalls
  354 options         COMPAT_FREEBSD7
  355 
  356 # Enable Linux Kernel Programming Interface
  357 #options        COMPAT_LINUXKPI
  358 
  359 #
  360 # These three options provide support for System V Interface
  361 # Definition-style interprocess communication, in the form of shared
  362 # memory, semaphores, and message queues, respectively.
  363 #
  364 options         SYSVSHM
  365 options         SYSVSEM
  366 options         SYSVMSG
  367 
  368 
  369 #####################################################################
  370 # DEBUGGING OPTIONS
  371 
  372 #
  373 # Compile with kernel debugger related code.
  374 #
  375 options         KDB
  376 
  377 #
  378 # Print a stack trace of the current thread on the console for a panic.
  379 #
  380 options         KDB_TRACE
  381 
  382 #
  383 # Don't enter the debugger for a panic. Intended for unattended operation
  384 # where you may want to enter the debugger from the console, but still want
  385 # the machine to recover from a panic.
  386 #
  387 options         KDB_UNATTENDED
  388 
  389 #
  390 # Enable the ddb debugger backend.
  391 #
  392 options         DDB
  393 
  394 #
  395 # Print the numerical value of symbols in addition to the symbolic
  396 # representation.
  397 #
  398 options         DDB_NUMSYM
  399 
  400 #
  401 # Enable the remote gdb debugger backend.
  402 #
  403 options         GDB
  404 
  405 #
  406 # SYSCTL_DEBUG enables a 'sysctl' debug tree that can be used to dump the
  407 # contents of the registered sysctl nodes on the console.  It is disabled by
  408 # default because it generates excessively verbose console output that can
  409 # interfere with serial console operation.
  410 #
  411 options         SYSCTL_DEBUG
  412 
  413 #
  414 # Enable textdump by default, this disables kernel core dumps.
  415 #
  416 options         TEXTDUMP_PREFERRED
  417 
  418 #
  419 # Enable extra debug messages while performing textdumps.
  420 #
  421 options         TEXTDUMP_VERBOSE
  422 
  423 #
  424 # NO_SYSCTL_DESCR omits the sysctl node descriptions to save space in the
  425 # resulting kernel.
  426 options         NO_SYSCTL_DESCR
  427 
  428 #
  429 # MALLOC_DEBUG_MAXZONES enables multiple uma zones for malloc(9)
  430 # allocations that are smaller than a page.  The purpose is to isolate
  431 # different malloc types into hash classes, so that any buffer
  432 # overruns or use-after-free will usually only affect memory from
  433 # malloc types in that hash class.  This is purely a debugging tool;
  434 # by varying the hash function and tracking which hash class was
  435 # corrupted, the intersection of the hash classes from each instance
  436 # will point to a single malloc type that is being misused.  At this
  437 # point inspection or memguard(9) can be used to catch the offending
  438 # code.
  439 #
  440 options         MALLOC_DEBUG_MAXZONES=8
  441 
  442 #
  443 # DEBUG_MEMGUARD builds and enables memguard(9), a replacement allocator
  444 # for the kernel used to detect modify-after-free scenarios.  See the
  445 # memguard(9) man page for more information on usage.
  446 #
  447 options         DEBUG_MEMGUARD
  448 
  449 #
  450 # DEBUG_REDZONE enables buffer underflows and buffer overflows detection for
  451 # malloc(9).
  452 #
  453 options         DEBUG_REDZONE
  454 
  455 #
  456 # KTRACE enables the system-call tracing facility ktrace(2).  To be more
  457 # SMP-friendly, KTRACE uses a worker thread to process most trace events
  458 # asynchronously to the thread generating the event.  This requires a
  459 # pre-allocated store of objects representing trace events.  The
  460 # KTRACE_REQUEST_POOL option specifies the initial size of this store.
  461 # The size of the pool can be adjusted both at boottime and runtime via
  462 # the kern.ktrace_request_pool tunable and sysctl.
  463 #
  464 options         KTRACE                  #kernel tracing
  465 options         KTRACE_REQUEST_POOL=101
  466 
  467 #
  468 # KTR is a kernel tracing facility imported from BSD/OS.  It is
  469 # enabled with the KTR option.  KTR_ENTRIES defines the number of
  470 # entries in the circular trace buffer; it may be an arbitrary number.
  471 # KTR_BOOT_ENTRIES defines the number of entries during the early boot,
  472 # before malloc(9) is functional.
  473 # KTR_COMPILE defines the mask of events to compile into the kernel as
  474 # defined by the KTR_* constants in <sys/ktr.h>.  KTR_MASK defines the
  475 # initial value of the ktr_mask variable which determines at runtime
  476 # what events to trace.  KTR_CPUMASK determines which CPU's log
  477 # events, with bit X corresponding to CPU X.  The layout of the string
  478 # passed as KTR_CPUMASK must match a series of bitmasks each of them
  479 # separated by the "," character (ie:
  480 # KTR_CPUMASK=0xAF,0xFFFFFFFFFFFFFFFF).  KTR_VERBOSE enables
  481 # dumping of KTR events to the console by default.  This functionality
  482 # can be toggled via the debug.ktr_verbose sysctl and defaults to off
  483 # if KTR_VERBOSE is not defined.  See ktr(4) and ktrdump(8) for details.
  484 #
  485 options         KTR
  486 options         KTR_BOOT_ENTRIES=1024
  487 options         KTR_ENTRIES=(128*1024)
  488 options         KTR_COMPILE=(KTR_INTR|KTR_PROC)
  489 options         KTR_MASK=KTR_INTR
  490 options         KTR_CPUMASK=0x3
  491 options         KTR_VERBOSE
  492 
  493 #
  494 # ALQ(9) is a facility for the asynchronous queuing of records from the kernel
  495 # to a vnode, and is employed by services such as ktr(4) to produce trace
  496 # files based on a kernel event stream.  Records are written asynchronously
  497 # in a worker thread.
  498 #
  499 options         ALQ
  500 options         KTR_ALQ
  501 
  502 #
  503 # The INVARIANTS option is used in a number of source files to enable
  504 # extra sanity checking of internal structures.  This support is not
  505 # enabled by default because of the extra time it would take to check
  506 # for these conditions, which can only occur as a result of
  507 # programming errors.
  508 #
  509 options         INVARIANTS
  510 
  511 #
  512 # The INVARIANT_SUPPORT option makes us compile in support for
  513 # verifying some of the internal structures.  It is a prerequisite for
  514 # 'INVARIANTS', as enabling 'INVARIANTS' will make these functions be
  515 # called.  The intent is that you can set 'INVARIANTS' for single
  516 # source files (by changing the source file or specifying it on the
  517 # command line) if you have 'INVARIANT_SUPPORT' enabled.  Also, if you
  518 # wish to build a kernel module with 'INVARIANTS', then adding
  519 # 'INVARIANT_SUPPORT' to your kernel will provide all the necessary
  520 # infrastructure without the added overhead.
  521 #
  522 options         INVARIANT_SUPPORT
  523 
  524 #
  525 # The DIAGNOSTIC option is used to enable extra debugging information
  526 # from some parts of the kernel.  As this makes everything more noisy,
  527 # it is disabled by default.
  528 #
  529 options         DIAGNOSTIC
  530 
  531 #
  532 # REGRESSION causes optional kernel interfaces necessary only for regression
  533 # testing to be enabled.  These interfaces may constitute security risks
  534 # when enabled, as they permit processes to easily modify aspects of the
  535 # run-time environment to reproduce unlikely or unusual (possibly normally
  536 # impossible) scenarios.
  537 #
  538 options         REGRESSION
  539 
  540 #
  541 # This option lets some drivers co-exist that can't co-exist in a running
  542 # system.  This is used to be able to compile all kernel code in one go for
  543 # quality assurance purposes (like this file, which the option takes it name
  544 # from.)
  545 #
  546 options         COMPILING_LINT
  547 
  548 #
  549 # STACK enables the stack(9) facility, allowing the capture of kernel stack
  550 # for the purpose of procinfo(1), etc.  stack(9) will also be compiled in
  551 # automatically if DDB(4) is compiled into the kernel.
  552 #
  553 options         STACK
  554 
  555 
  556 #####################################################################
  557 # PERFORMANCE MONITORING OPTIONS
  558 
  559 #
  560 # The hwpmc driver that allows the use of in-CPU performance monitoring
  561 # counters for performance monitoring.  The base kernel needs to be configured
  562 # with the 'options' line, while the hwpmc device can be either compiled
  563 # in or loaded as a loadable kernel module.
  564 #
  565 # Additional configuration options may be required on specific architectures,
  566 # please see hwpmc(4).
  567 
  568 device          hwpmc                   # Driver (also a loadable module)
  569 options         HWPMC_DEBUG
  570 options         HWPMC_HOOKS             # Other necessary kernel hooks
  571 
  572 
  573 #####################################################################
  574 # NETWORKING OPTIONS
  575 
  576 #
  577 # Protocol families
  578 #
  579 options         INET                    #Internet communications protocols
  580 options         INET6                   #IPv6 communications protocols
  581 
  582 options         ROUTETABLES=2           # allocated fibs up to 65536. default is 1.
  583                                         # but that would be a bad idea as they are large.
  584 
  585 options         TCP_OFFLOAD             # TCP offload support.
  586 
  587 # In order to enable IPSEC you MUST also add device crypto to 
  588 # your kernel configuration
  589 options         IPSEC                   #IP security (requires device crypto)
  590 #options        IPSEC_DEBUG             #debug for IP security
  591 #
  592 # #DEPRECATED#
  593 # Set IPSEC_FILTERTUNNEL to change the default of the sysctl to force packets
  594 # coming through a tunnel to be processed by any configured packet filtering
  595 # twice. The default is that packets coming out of a tunnel are _not_ processed;
  596 # they are assumed trusted.
  597 #
  598 # IPSEC history is preserved for such packets, and can be filtered
  599 # using ipfw(8)'s 'ipsec' keyword, when this option is enabled.
  600 #
  601 #options        IPSEC_FILTERTUNNEL      #filter ipsec packets from a tunnel
  602 #
  603 # Set IPSEC_NAT_T to enable NAT-Traversal support.  This enables
  604 # optional UDP encapsulation of ESP packets.
  605 #
  606 options         IPSEC_NAT_T             #NAT-T support, UDP encap of ESP
  607 
  608 options         IPX                     #IPX/SPX communications protocols
  609 
  610 options         NETATALK                #Appletalk communications protocols
  611 options         NETATALKDEBUG           #Appletalk debugging
  612 
  613 #
  614 # SMB/CIFS requester
  615 # NETSMB enables support for SMB protocol, it requires LIBMCHAIN and LIBICONV
  616 # options.
  617 options         NETSMB                  #SMB/CIFS requester
  618 
  619 # mchain library. It can be either loaded as KLD or compiled into kernel
  620 options         LIBMCHAIN
  621 
  622 # libalias library, performing NAT
  623 options         LIBALIAS
  624 
  625 # flowtable cache
  626 options         FLOWTABLE
  627 
  628 #
  629 # SCTP is a NEW transport protocol defined by
  630 # RFC2960 updated by RFC3309 and RFC3758.. and
  631 # soon to have a new base RFC and many many more
  632 # extensions. This release supports all the extensions
  633 # including many drafts (most about to become RFC's).
  634 # It is the reference implementation of SCTP
  635 # and is quite well tested.
  636 #
  637 # Note YOU MUST have both INET and INET6 defined.
  638 # You don't have to enable V6, but SCTP is 
  639 # dual stacked and so far we have not torn apart
  640 # the V6 and V4.. since an association can span
  641 # both a V6 and V4 address at the SAME time :-)
  642 #
  643 options         SCTP
  644 # There are bunches of options:
  645 # this one turns on all sorts of
  646 # nastily printing that you can
  647 # do. It's all controlled by a
  648 # bit mask (settable by socket opt and
  649 # by sysctl). Including will not cause
  650 # logging until you set the bits.. but it
  651 # can be quite verbose.. so without this
  652 # option we don't do any of the tests for
  653 # bits and prints.. which makes the code run
  654 # faster.. if you are not debugging don't use.
  655 options         SCTP_DEBUG
  656 #
  657 # This option turns off the CRC32c checksum. Basically,
  658 # you will not be able to talk to anyone else who
  659 # has not done this. Its more for experimentation to
  660 # see how much CPU the CRC32c really takes. Most new
  661 # cards for TCP support checksum offload.. so this 
  662 # option gives you a "view" into what SCTP would be
  663 # like with such an offload (which only exists in
  664 # high in iSCSI boards so far). With the new
  665 # splitting 8's algorithm its not as bad as it used
  666 # to be.. but it does speed things up try only
  667 # for in a captured lab environment :-)
  668 options         SCTP_WITH_NO_CSUM
  669 #
  670 
  671 #
  672 # All that options after that turn on specific types of
  673 # logging. You can monitor CWND growth, flight size
  674 # and all sorts of things. Go look at the code and
  675 # see. I have used this to produce interesting 
  676 # charts and graphs as well :->
  677 # 
  678 # I have not yet committed the tools to get and print
  679 # the logs, I will do that eventually .. before then
  680 # if you want them send me an email rrs@freebsd.org
  681 # You basically must have ktr(4) enabled for these
  682 # and you then set the sysctl to turn on/off various
  683 # logging bits. Use ktrdump(8) to pull the log and run
  684 # it through a display program.. and graphs and other
  685 # things too.
  686 #
  687 options         SCTP_LOCK_LOGGING
  688 options         SCTP_MBUF_LOGGING
  689 options         SCTP_MBCNT_LOGGING
  690 options         SCTP_PACKET_LOGGING
  691 options         SCTP_LTRACE_CHUNKS
  692 options         SCTP_LTRACE_ERRORS
  693 
  694 
  695 # altq(9). Enable the base part of the hooks with the ALTQ option.
  696 # Individual disciplines must be built into the base system and can not be
  697 # loaded as modules at this point. ALTQ requires a stable TSC so if yours is
  698 # broken or changes with CPU throttling then you must also have the ALTQ_NOPCC
  699 # option.
  700 options         ALTQ
  701 options         ALTQ_CBQ        # Class Based Queueing
  702 options         ALTQ_RED        # Random Early Detection
  703 options         ALTQ_RIO        # RED In/Out
  704 options         ALTQ_CODEL      # CoDel Active Queueing
  705 options         ALTQ_HFSC       # Hierarchical Packet Scheduler
  706 options         ALTQ_FAIRQ      # Fair Packet Scheduler
  707 options         ALTQ_CDNR       # Traffic conditioner
  708 options         ALTQ_PRIQ       # Priority Queueing
  709 options         ALTQ_NOPCC      # Required if the TSC is unusable
  710 options         ALTQ_DEBUG
  711 
  712 # netgraph(4). Enable the base netgraph code with the NETGRAPH option.
  713 # Individual node types can be enabled with the corresponding option
  714 # listed below; however, this is not strictly necessary as netgraph
  715 # will automatically load the corresponding KLD module if the node type
  716 # is not already compiled into the kernel. Each type below has a
  717 # corresponding man page, e.g., ng_async(8).
  718 options         NETGRAPH                # netgraph(4) system
  719 options         NETGRAPH_DEBUG          # enable extra debugging, this
  720                                         # affects netgraph(4) and nodes
  721 # Node types
  722 options         NETGRAPH_ASYNC
  723 options         NETGRAPH_ATMLLC
  724 options         NETGRAPH_ATM_ATMPIF
  725 options         NETGRAPH_BLUETOOTH              # ng_bluetooth(4)
  726 options         NETGRAPH_BLUETOOTH_BT3C         # ng_bt3c(4)
  727 options         NETGRAPH_BLUETOOTH_HCI          # ng_hci(4)
  728 options         NETGRAPH_BLUETOOTH_L2CAP        # ng_l2cap(4)
  729 options         NETGRAPH_BLUETOOTH_SOCKET       # ng_btsocket(4)
  730 options         NETGRAPH_BLUETOOTH_UBT          # ng_ubt(4)
  731 options         NETGRAPH_BLUETOOTH_UBTBCMFW     # ubtbcmfw(4)
  732 options         NETGRAPH_BPF
  733 options         NETGRAPH_BRIDGE
  734 options         NETGRAPH_CAR
  735 options         NETGRAPH_CISCO
  736 options         NETGRAPH_DEFLATE
  737 options         NETGRAPH_DEVICE
  738 options         NETGRAPH_ECHO
  739 options         NETGRAPH_EIFACE
  740 options         NETGRAPH_ETHER
  741 options         NETGRAPH_FEC
  742 options         NETGRAPH_FRAME_RELAY
  743 options         NETGRAPH_GIF
  744 options         NETGRAPH_GIF_DEMUX
  745 options         NETGRAPH_HOLE
  746 options         NETGRAPH_IFACE
  747 options         NETGRAPH_IP_INPUT
  748 options         NETGRAPH_IPFW
  749 options         NETGRAPH_KSOCKET
  750 options         NETGRAPH_L2TP
  751 options         NETGRAPH_LMI
  752 options         NETGRAPH_MPPC_COMPRESSION
  753 options         NETGRAPH_MPPC_ENCRYPTION
  754 options         NETGRAPH_NETFLOW
  755 options         NETGRAPH_NAT
  756 options         NETGRAPH_ONE2MANY
  757 options         NETGRAPH_PATCH
  758 options         NETGRAPH_PIPE
  759 options         NETGRAPH_PPP
  760 options         NETGRAPH_PPPOE
  761 options         NETGRAPH_PPTPGRE
  762 options         NETGRAPH_PRED1
  763 options         NETGRAPH_RFC1490
  764 options         NETGRAPH_SOCKET
  765 options         NETGRAPH_SPLIT
  766 options         NETGRAPH_SPPP
  767 options         NETGRAPH_TAG
  768 options         NETGRAPH_TCPMSS
  769 options         NETGRAPH_TEE
  770 options         NETGRAPH_UI
  771 options         NETGRAPH_VJC
  772 options         NETGRAPH_VLAN
  773 
  774 # NgATM - Netgraph ATM
  775 options         NGATM_ATM
  776 options         NGATM_ATMBASE
  777 options         NGATM_SSCOP
  778 options         NGATM_SSCFU
  779 options         NGATM_UNI
  780 options         NGATM_CCATM
  781 
  782 device          mn      # Munich32x/Falc54 Nx64kbit/sec cards.
  783 
  784 # Network stack virtualization.
  785 #options        VIMAGE
  786 #options        VNET_DEBUG      # debug for VIMAGE
  787 
  788 #
  789 # Network interfaces:
  790 #  The `loop' device is MANDATORY when networking is enabled.
  791 device          loop
  792 
  793 #  The `ether' device provides generic code to handle
  794 #  Ethernets; it is MANDATORY when an Ethernet device driver is
  795 #  configured or token-ring is enabled.
  796 device          ether
  797 
  798 #  The `vlan' device implements the VLAN tagging of Ethernet frames
  799 #  according to IEEE 802.1Q.
  800 device          vlan
  801 
  802 # The `vxlan' device implements the VXLAN encapsulation of Ethernet
  803 # frames in UDP packets according to RFC7348.
  804 device          vxlan
  805 
  806 #  The `wlan' device provides generic code to support 802.11
  807 #  drivers, including host AP mode; it is MANDATORY for the wi,
  808 #  and ath drivers and will eventually be required by all 802.11 drivers.
  809 device          wlan
  810 options         IEEE80211_DEBUG         #enable debugging msgs
  811 options         IEEE80211_AMPDU_AGE     #age frames in AMPDU reorder q's
  812 options         IEEE80211_SUPPORT_MESH  #enable 802.11s D3.0 support
  813 options         IEEE80211_SUPPORT_TDMA  #enable TDMA support
  814 
  815 #  The `wlan_wep', `wlan_tkip', and `wlan_ccmp' devices provide
  816 #  support for WEP, TKIP, and AES-CCMP crypto protocols optionally
  817 #  used with 802.11 devices that depend on the `wlan' module.
  818 device          wlan_wep
  819 device          wlan_ccmp
  820 device          wlan_tkip
  821 
  822 #  The `wlan_xauth' device provides support for external (i.e. user-mode)
  823 #  authenticators for use with 802.11 drivers that use the `wlan'
  824 #  module and support 802.1x and/or WPA security protocols.
  825 device          wlan_xauth
  826 
  827 #  The `wlan_acl' device provides a MAC-based access control mechanism
  828 #  for use with 802.11 drivers operating in ap mode and using the
  829 #  `wlan' module.
  830 #  The 'wlan_amrr' device provides AMRR transmit rate control algorithm
  831 device          wlan_acl
  832 device          wlan_amrr
  833 
  834 # Generic TokenRing
  835 device          token
  836 
  837 #  The `fddi' device provides generic code to support FDDI.
  838 device          fddi
  839 
  840 #  The `arcnet' device provides generic code to support Arcnet.
  841 device          arcnet
  842 
  843 #  The `sppp' device serves a similar role for certain types
  844 #  of synchronous PPP links (like `cx', `ar').
  845 device          sppp
  846 
  847 #  The `bpf' device enables the Berkeley Packet Filter.  Be
  848 #  aware of the legal and administrative consequences of enabling this
  849 #  option.  DHCP requires bpf.
  850 device          bpf
  851 
  852 #  The `netmap' device implements memory-mapped access to network
  853 #  devices from userspace, enabling wire-speed packet capture and
  854 #  generation even at 10Gbit/s. Requires support in the device
  855 #  driver. Supported drivers are ixgbe, e1000, re.
  856 device          netmap
  857 
  858 #  The `disc' device implements a minimal network interface,
  859 #  which throws away all packets sent and never receives any.  It is
  860 #  included for testing and benchmarking purposes.
  861 device          disc
  862 
  863 # The `epair' device implements a virtual back-to-back connected Ethernet
  864 # like interface pair.
  865 device          epair
  866 
  867 #  The `edsc' device implements a minimal Ethernet interface,
  868 #  which discards all packets sent and receives none.
  869 device          edsc
  870 
  871 #  The `tap' device is a pty-like virtual Ethernet interface
  872 device          tap
  873 
  874 #  The `tun' device implements (user-)ppp and nos-tun(8)
  875 device          tun
  876 
  877 #  The `gif' device implements IPv6 over IP4 tunneling,
  878 #  IPv4 over IPv6 tunneling, IPv4 over IPv4 tunneling and
  879 #  IPv6 over IPv6 tunneling.
  880 #  The `gre' device implements GRE (Generic Routing Encapsulation) tunneling,
  881 #  as specified in the RFC 2784 and RFC 2890.
  882 #  The `me' device implements Minimal Encapsulation within IPv4 as
  883 #  specified in the RFC 2004.
  884 #  The XBONEHACK option allows the same pair of addresses to be configured on
  885 #  multiple gif interfaces.
  886 device          gif
  887 device          gre
  888 device          me
  889 options         XBONEHACK
  890 
  891 #  The `faith' device captures packets sent to it and diverts them
  892 #  to the IPv4/IPv6 translation daemon.
  893 #  The `stf' device implements 6to4 encapsulation.
  894 device          faith
  895 device          stf
  896 
  897 #  The `ef' device provides support for multiple ethernet frame types
  898 #  specified via ETHER_* options. See ef(4) for details.
  899 device          ef
  900 options         ETHER_II                # enable Ethernet_II frame
  901 options         ETHER_8023              # enable Ethernet_802.3 (Novell) frame
  902 options         ETHER_8022              # enable Ethernet_802.2 frame
  903 options         ETHER_SNAP              # enable Ethernet_802.2/SNAP frame
  904 
  905 # The pf packet filter consists of three devices:
  906 #  The `pf' device provides /dev/pf and the firewall code itself.
  907 #  The `pflog' device provides the pflog0 interface which logs packets.
  908 #  The `pfsync' device provides the pfsync0 interface used for
  909 #   synchronization of firewall state tables (over the net).
  910 device          pf
  911 device          pflog
  912 device          pfsync
  913 
  914 # Bridge interface.
  915 device          if_bridge
  916 
  917 # Common Address Redundancy Protocol. See carp(4) for more details.
  918 device          carp
  919 
  920 # IPsec interface.
  921 device          enc
  922 
  923 # Link aggregation interface.
  924 device          lagg
  925 
  926 #
  927 # Internet family options:
  928 #
  929 # MROUTING enables the kernel multicast packet forwarder, which works
  930 # with mrouted and XORP.
  931 #
  932 # IPFIREWALL enables support for IP firewall construction, in
  933 # conjunction with the `ipfw' program.  IPFIREWALL_VERBOSE sends
  934 # logged packets to the system logger.  IPFIREWALL_VERBOSE_LIMIT
  935 # limits the number of times a matching entry can be logged.
  936 #
  937 # WARNING:  IPFIREWALL defaults to a policy of "deny ip from any to any"
  938 # and if you do not add other rules during startup to allow access,
  939 # YOU WILL LOCK YOURSELF OUT.  It is suggested that you set firewall_type=open
  940 # in /etc/rc.conf when first enabling this feature, then refining the
  941 # firewall rules in /etc/rc.firewall after you've tested that the new kernel
  942 # feature works properly.
  943 #
  944 # IPFIREWALL_DEFAULT_TO_ACCEPT causes the default rule (at boot) to
  945 # allow everything.  Use with care, if a cracker can crash your
  946 # firewall machine, they can get to your protected machines.  However,
  947 # if you are using it as an as-needed filter for specific problems as
  948 # they arise, then this may be for you.  Changing the default to 'allow'
  949 # means that you won't get stuck if the kernel and /sbin/ipfw binary get
  950 # out of sync.
  951 #
  952 # IPDIVERT enables the divert IP sockets, used by ``ipfw divert''.  It
  953 # depends on IPFIREWALL if compiled into the kernel.
  954 #
  955 # IPFIREWALL_NAT adds support for in kernel nat in ipfw, and it requires
  956 # LIBALIAS.
  957 #
  958 # IPSTEALTH enables code to support stealth forwarding (i.e., forwarding
  959 # packets without touching the TTL).  This can be useful to hide firewalls
  960 # from traceroute and similar tools.
  961 #
  962 # PF_DEFAULT_TO_DROP causes the default pf(4) rule to deny everything.
  963 #
  964 # TCPDEBUG enables code which keeps traces of the TCP state machine
  965 # for sockets with the SO_DEBUG option set, which can then be examined
  966 # using the trpt(8) utility.
  967 #
  968 # RADIX_MPATH provides support for equal-cost multi-path routing.
  969 #
  970 options         MROUTING                # Multicast routing
  971 options         IPFIREWALL              #firewall
  972 options         IPFIREWALL_VERBOSE      #enable logging to syslogd(8)
  973 options         IPFIREWALL_VERBOSE_LIMIT=100    #limit verbosity
  974 options         IPFIREWALL_DEFAULT_TO_ACCEPT    #allow everything by default
  975 options         IPFIREWALL_NAT          #ipfw kernel nat support
  976 options         IPDIVERT                #divert sockets
  977 options         IPFILTER                #ipfilter support
  978 options         IPFILTER_LOG            #ipfilter logging
  979 options         IPFILTER_LOOKUP         #ipfilter pools
  980 options         IPFILTER_DEFAULT_BLOCK  #block all packets by default
  981 options         IPSTEALTH               #support for stealth forwarding
  982 options         PF_DEFAULT_TO_DROP      #drop everything by default
  983 options         TCPDEBUG
  984 options         RADIX_MPATH
  985 
  986 # The MBUF_STRESS_TEST option enables options which create
  987 # various random failures / extreme cases related to mbuf
  988 # functions.  See mbuf(9) for a list of available test cases.
  989 # MBUF_PROFILING enables code to profile the mbuf chains
  990 # exiting the system (via participating interfaces) and
  991 # return a logarithmic histogram of monitored parameters
  992 # (e.g. packet size, wasted space, number of mbufs in chain).
  993 options         MBUF_STRESS_TEST
  994 options         MBUF_PROFILING
  995 
  996 # Statically link in accept filters
  997 options         ACCEPT_FILTER_DATA
  998 options         ACCEPT_FILTER_DNS
  999 options         ACCEPT_FILTER_HTTP
 1000 
 1001 # TCP_SIGNATURE adds support for RFC 2385 (TCP-MD5) digests. These are
 1002 # carried in TCP option 19. This option is commonly used to protect
 1003 # TCP sessions (e.g. BGP) where IPSEC is not available nor desirable.
 1004 # This is enabled on a per-socket basis using the TCP_MD5SIG socket option.
 1005 # This requires the use of 'device crypto', 'options IPSEC'
 1006 # or 'device cryptodev'.
 1007 options         TCP_SIGNATURE           #include support for RFC 2385
 1008 
 1009 # DUMMYNET enables the "dummynet" bandwidth limiter.  You need IPFIREWALL
 1010 # as well.  See dummynet(4) and ipfw(8) for more info.  When you run
 1011 # DUMMYNET it is advisable to also have at least "options HZ=1000" to achieve
 1012 # a smooth scheduling of the traffic.
 1013 options         DUMMYNET
 1014 
 1015 #####################################################################
 1016 # FILESYSTEM OPTIONS
 1017 
 1018 #
 1019 # Only the root filesystem needs to be statically compiled or preloaded
 1020 # as module; everything else will be automatically loaded at mount
 1021 # time.  Some people still prefer to statically compile other
 1022 # filesystems as well.
 1023 #
 1024 # NB: The UNION filesystem was known to be buggy in the past.  It is now
 1025 # being actively maintained, although there are still some issues being
 1026 # resolved.
 1027 #
 1028 
 1029 # One of these is mandatory:
 1030 options         FFS                     #Fast filesystem
 1031 options         NFSCLIENT               #Network File System client
 1032 
 1033 # The rest are optional:
 1034 options         AUTOFS                  #Automounter filesystem
 1035 options         CD9660                  #ISO 9660 filesystem
 1036 options         FDESCFS                 #File descriptor filesystem
 1037 options         FUSE                    #FUSE support module
 1038 options         MSDOSFS                 #MS DOS File System (FAT, FAT32)
 1039 options         NFSSERVER               #Network File System server
 1040 options         NFSLOCKD                #Network Lock Manager
 1041 options         NFSCL                   #New Network Filesystem Client
 1042 options         NFSD                    #New Network Filesystem Server
 1043 options         KGSSAPI                 #Kernel GSSAPI implementation
 1044 
 1045 options         NULLFS                  #NULL filesystem
 1046 options         PROCFS                  #Process filesystem (requires PSEUDOFS)
 1047 options         PSEUDOFS                #Pseudo-filesystem framework
 1048 options         PSEUDOFS_TRACE          #Debugging support for PSEUDOFS
 1049 options         SMBFS                   #SMB/CIFS filesystem
 1050 options         TMPFS                   #Efficient memory filesystem
 1051 options         UDF                     #Universal Disk Format
 1052 options         UNIONFS                 #Union filesystem
 1053 # The xFS_ROOT options REQUIRE the associated ``options xFS''
 1054 options         NFS_ROOT                #NFS usable as root device
 1055 
 1056 # Soft updates is a technique for improving filesystem speed and
 1057 # making abrupt shutdown less risky.
 1058 #
 1059 options         SOFTUPDATES
 1060 
 1061 # Extended attributes allow additional data to be associated with files,
 1062 # and is used for ACLs, Capabilities, and MAC labels.
 1063 # See src/sys/ufs/ufs/README.extattr for more information.
 1064 options         UFS_EXTATTR
 1065 options         UFS_EXTATTR_AUTOSTART
 1066 
 1067 # Access Control List support for UFS filesystems.  The current ACL
 1068 # implementation requires extended attribute support, UFS_EXTATTR,
 1069 # for the underlying filesystem.
 1070 # See src/sys/ufs/ufs/README.acls for more information.
 1071 options         UFS_ACL
 1072 
 1073 # Directory hashing improves the speed of operations on very large
 1074 # directories at the expense of some memory.
 1075 options         UFS_DIRHASH
 1076 
 1077 # Gjournal-based UFS journaling support.
 1078 options         UFS_GJOURNAL
 1079 
 1080 # Make space in the kernel for a root filesystem on a md device.
 1081 # Define to the number of kilobytes to reserve for the filesystem.
 1082 options         MD_ROOT_SIZE=10
 1083 
 1084 # Make the md device a potential root device, either with preloaded
 1085 # images of type mfs_root or md_root.
 1086 options         MD_ROOT
 1087 
 1088 # Disk quotas are supported when this option is enabled.
 1089 options         QUOTA                   #enable disk quotas
 1090 
 1091 # If you are running a machine just as a fileserver for PC and MAC
 1092 # users, using SAMBA or Netatalk, you may consider setting this option
 1093 # and keeping all those users' directories on a filesystem that is
 1094 # mounted with the suiddir option. This gives new files the same
 1095 # ownership as the directory (similar to group). It's a security hole
 1096 # if you let these users run programs, so confine it to file-servers
 1097 # (but it'll save you lots of headaches in those cases). Root owned
 1098 # directories are exempt and X bits are cleared. The suid bit must be
 1099 # set on the directory as well; see chmod(1). PC owners can't see/set
 1100 # ownerships so they keep getting their toes trodden on. This saves
 1101 # you all the support calls as the filesystem it's used on will act as
 1102 # they expect: "It's my dir so it must be my file".
 1103 #
 1104 options         SUIDDIR
 1105 
 1106 # NFS options:
 1107 options         NFS_MINATTRTIMO=3       # VREG attrib cache timeout in sec
 1108 options         NFS_MAXATTRTIMO=60
 1109 options         NFS_MINDIRATTRTIMO=30   # VDIR attrib cache timeout in sec
 1110 options         NFS_MAXDIRATTRTIMO=60
 1111 options         NFS_GATHERDELAY=10      # Default write gather delay (msec)
 1112 options         NFS_WDELAYHASHSIZ=16    # and with this
 1113 options         NFS_DEBUG               # Enable NFS Debugging
 1114 
 1115 #
 1116 # Add support for the EXT2FS filesystem of Linux fame.  Be a bit
 1117 # careful with this - the ext2fs code has a tendency to lag behind
 1118 # changes and not be exercised very much, so mounting read/write could
 1119 # be dangerous (and even mounting read only could result in panics.)
 1120 #
 1121 options         EXT2FS
 1122 
 1123 #
 1124 # Add support for the ReiserFS filesystem (used in Linux). Currently,
 1125 # this is limited to read-only access.
 1126 #
 1127 options         REISERFS
 1128 
 1129 # Use real implementations of the aio_* system calls.  There are numerous
 1130 # stability and security issues in the current aio code that make it
 1131 # unsuitable for inclusion on machines with untrusted local users.
 1132 options         VFS_AIO
 1133 
 1134 # Cryptographically secure random number generator; /dev/random
 1135 device          random
 1136 
 1137 # The system memory devices; /dev/mem, /dev/kmem
 1138 device          mem
 1139 
 1140 # The kernel symbol table device; /dev/ksyms
 1141 device          ksyms
 1142 
 1143 # Optional character code conversion support with LIBICONV.
 1144 # Each option requires their base file system and LIBICONV.
 1145 options         CD9660_ICONV
 1146 options         MSDOSFS_ICONV
 1147 options         UDF_ICONV
 1148 
 1149 
 1150 #####################################################################
 1151 # POSIX P1003.1B
 1152 
 1153 # Real time extensions added in the 1993 POSIX
 1154 # _KPOSIX_PRIORITY_SCHEDULING: Build in _POSIX_PRIORITY_SCHEDULING
 1155 
 1156 options         _KPOSIX_PRIORITY_SCHEDULING
 1157 # p1003_1b_semaphores are very experimental,
 1158 # user should be ready to assist in debugging if problems arise.
 1159 options         P1003_1B_SEMAPHORES
 1160 
 1161 # POSIX message queue
 1162 options         P1003_1B_MQUEUE
 1163 
 1164 #####################################################################
 1165 # SECURITY POLICY PARAMETERS
 1166 
 1167 # Support for BSM audit
 1168 options         AUDIT
 1169 
 1170 # Support for Mandatory Access Control (MAC):
 1171 options         MAC
 1172 options         MAC_BIBA
 1173 options         MAC_BSDEXTENDED
 1174 options         MAC_IFOFF
 1175 options         MAC_LOMAC
 1176 options         MAC_MLS
 1177 options         MAC_NONE
 1178 options         MAC_PARTITION
 1179 options         MAC_PORTACL
 1180 options         MAC_SEEOTHERUIDS
 1181 options         MAC_STUB
 1182 options         MAC_TEST
 1183 
 1184 # Support for Capsicum
 1185 options         CAPABILITIES    # fine-grained rights on file descriptors
 1186 options         CAPABILITY_MODE # sandboxes with no global namespace access
 1187 
 1188 # Support for process descriptors
 1189 options         PROCDESC
 1190 
 1191 
 1192 #####################################################################
 1193 # CLOCK OPTIONS
 1194 
 1195 # The granularity of operation is controlled by the kernel option HZ whose
 1196 # default value (1000 on most architectures) means a granularity of 1ms
 1197 # (1s/HZ).  Historically, the default was 100, but finer granularity is
 1198 # required for DUMMYNET and other systems on modern hardware.  There are
 1199 # reasonable arguments that HZ should, in fact, be 100 still; consider,
 1200 # that reducing the granularity too much might cause excessive overhead in
 1201 # clock interrupt processing, potentially causing ticks to be missed and thus
 1202 # actually reducing the accuracy of operation.
 1203 
 1204 options         HZ=100
 1205 
 1206 # Enable support for the kernel PLL to use an external PPS signal,
 1207 # under supervision of [x]ntpd(8)
 1208 # More info in ntpd documentation: http://www.eecis.udel.edu/~ntp
 1209 
 1210 options         PPS_SYNC
 1211 
 1212 # Enable support for generic feed-forward clocks in the kernel.
 1213 # The feed-forward clock support is an alternative to the feedback oriented
 1214 # ntpd/system clock approach, and is to be used with a feed-forward
 1215 # synchronization algorithm such as the RADclock:
 1216 # More info here: http://www.synclab.org/radclock
 1217 
 1218 options         FFCLOCK
 1219 
 1220 
 1221 #####################################################################
 1222 # SCSI DEVICES
 1223 
 1224 # SCSI DEVICE CONFIGURATION
 1225 
 1226 # The SCSI subsystem consists of the `base' SCSI code, a number of
 1227 # high-level SCSI device `type' drivers, and the low-level host-adapter
 1228 # device drivers.  The host adapters are listed in the ISA and PCI
 1229 # device configuration sections below.
 1230 #
 1231 # It is possible to wire down your SCSI devices so that a given bus,
 1232 # target, and LUN always come on line as the same device unit.  In
 1233 # earlier versions the unit numbers were assigned in the order that
 1234 # the devices were probed on the SCSI bus.  This means that if you
 1235 # removed a disk drive, you may have had to rewrite your /etc/fstab
 1236 # file, and also that you had to be careful when adding a new disk
 1237 # as it may have been probed earlier and moved your device configuration
 1238 # around.  (See also option GEOM_VOL for a different solution to this
 1239 # problem.)
 1240 
 1241 # This old behavior is maintained as the default behavior.  The unit
 1242 # assignment begins with the first non-wired down unit for a device
 1243 # type.  For example, if you wire a disk as "da3" then the first
 1244 # non-wired disk will be assigned da4.
 1245 
 1246 # The syntax for wiring down devices is:
 1247 
 1248 hint.scbus.0.at="ahc0"
 1249 hint.scbus.1.at="ahc1"
 1250 hint.scbus.1.bus="0"
 1251 hint.scbus.3.at="ahc2"
 1252 hint.scbus.3.bus="0"
 1253 hint.scbus.2.at="ahc2"
 1254 hint.scbus.2.bus="1"
 1255 hint.da.0.at="scbus0"
 1256 hint.da.0.target="0"
 1257 hint.da.0.unit="0"
 1258 hint.da.1.at="scbus3"
 1259 hint.da.1.target="1"
 1260 hint.da.2.at="scbus2"
 1261 hint.da.2.target="3"
 1262 hint.sa.1.at="scbus1"
 1263 hint.sa.1.target="6"
 1264 
 1265 # "units" (SCSI logical unit number) that are not specified are
 1266 # treated as if specified as LUN 0.
 1267 
 1268 # All SCSI devices allocate as many units as are required.
 1269 
 1270 # The ch driver drives SCSI Media Changer ("jukebox") devices.
 1271 #
 1272 # The da driver drives SCSI Direct Access ("disk") and Optical Media
 1273 # ("WORM") devices.
 1274 #
 1275 # The sa driver drives SCSI Sequential Access ("tape") devices.
 1276 #
 1277 # The cd driver drives SCSI Read Only Direct Access ("cd") devices.
 1278 #
 1279 # The ses driver drives SCSI Environment Services ("ses") and
 1280 # SAF-TE ("SCSI Accessible Fault-Tolerant Enclosure") devices.
 1281 #
 1282 # The pt driver drives SCSI Processor devices.
 1283 #
 1284 # The sg driver provides a passthrough API that is compatible with the
 1285 # Linux SG driver.  It will work in conjunction with the COMPAT_LINUX
 1286 # option to run linux SG apps.  It can also stand on its own and provide
 1287 # source level API compatibility for porting apps to FreeBSD.
 1288 #
 1289 # Target Mode support is provided here but also requires that a SIM
 1290 # (SCSI Host Adapter Driver) provide support as well.
 1291 #
 1292 # The targ driver provides target mode support as a Processor type device.
 1293 # It exists to give the minimal context necessary to respond to Inquiry
 1294 # commands. There is a sample user application that shows how the rest
 1295 # of the command support might be done in /usr/share/examples/scsi_target.
 1296 #
 1297 # The targbh driver provides target mode support and exists to respond
 1298 # to incoming commands that do not otherwise have a logical unit assigned
 1299 # to them.
 1300 #
 1301 # The "unknown" device (uk? in pre-2.0.5) is now part of the base SCSI
 1302 # configuration as the "pass" driver.
 1303 
 1304 device          scbus           #base SCSI code
 1305 device          ch              #SCSI media changers
 1306 device          da              #SCSI direct access devices (aka disks)
 1307 device          sa              #SCSI tapes
 1308 device          cd              #SCSI CD-ROMs
 1309 device          ses             #Enclosure Services (SES and SAF-TE)
 1310 device          pt              #SCSI processor
 1311 device          targ            #SCSI Target Mode Code
 1312 device          targbh          #SCSI Target Mode Blackhole Device
 1313 device          pass            #CAM passthrough driver
 1314 device          sg              #Linux SCSI passthrough
 1315 device          ctl             #CAM Target Layer
 1316 
 1317 # CAM OPTIONS:
 1318 # debugging options:
 1319 # CAMDEBUG              Compile in all possible debugging.
 1320 # CAM_DEBUG_COMPILE     Debug levels to compile in.
 1321 # CAM_DEBUG_FLAGS       Debug levels to enable on boot.
 1322 # CAM_DEBUG_BUS         Limit debugging to the given bus.
 1323 # CAM_DEBUG_TARGET      Limit debugging to the given target.
 1324 # CAM_DEBUG_LUN         Limit debugging to the given lun.
 1325 # CAM_DEBUG_DELAY       Delay in us after printing each debug line.
 1326 #
 1327 # CAM_MAX_HIGHPOWER: Maximum number of concurrent high power (start unit) cmds
 1328 # SCSI_NO_SENSE_STRINGS: When defined disables sense descriptions
 1329 # SCSI_NO_OP_STRINGS: When defined disables opcode descriptions
 1330 # SCSI_DELAY: The number of MILLISECONDS to freeze the SIM (scsi adapter)
 1331 #             queue after a bus reset, and the number of milliseconds to
 1332 #             freeze the device queue after a bus device reset.  This
 1333 #             can be changed at boot and runtime with the
 1334 #             kern.cam.scsi_delay tunable/sysctl.
 1335 options         CAMDEBUG
 1336 options         CAM_DEBUG_COMPILE=-1
 1337 options         CAM_DEBUG_FLAGS=(CAM_DEBUG_INFO|CAM_DEBUG_PROBE|CAM_DEBUG_PERIPH)
 1338 options         CAM_DEBUG_BUS=-1
 1339 options         CAM_DEBUG_TARGET=-1
 1340 options         CAM_DEBUG_LUN=-1
 1341 options         CAM_DEBUG_DELAY=1
 1342 options         CAM_MAX_HIGHPOWER=4
 1343 options         SCSI_NO_SENSE_STRINGS
 1344 options         SCSI_NO_OP_STRINGS
 1345 options         SCSI_DELAY=5000 # Be pessimistic about Joe SCSI device
 1346 
 1347 # Options for the CAM CDROM driver:
 1348 # CHANGER_MIN_BUSY_SECONDS: Guaranteed minimum time quantum for a changer LUN
 1349 # CHANGER_MAX_BUSY_SECONDS: Maximum time quantum per changer LUN, only
 1350 #                           enforced if there is I/O waiting for another LUN
 1351 # The compiled in defaults for these variables are 2 and 10 seconds,
 1352 # respectively.
 1353 #
 1354 # These can also be changed on the fly with the following sysctl variables:
 1355 # kern.cam.cd.changer.min_busy_seconds
 1356 # kern.cam.cd.changer.max_busy_seconds
 1357 #
 1358 options         CHANGER_MIN_BUSY_SECONDS=2
 1359 options         CHANGER_MAX_BUSY_SECONDS=10
 1360 
 1361 # Options for the CAM sequential access driver:
 1362 # SA_IO_TIMEOUT: Timeout for read/write/wfm  operations, in minutes
 1363 # SA_SPACE_TIMEOUT: Timeout for space operations, in minutes
 1364 # SA_REWIND_TIMEOUT: Timeout for rewind operations, in minutes
 1365 # SA_ERASE_TIMEOUT: Timeout for erase operations, in minutes
 1366 # SA_1FM_AT_EOD: Default to model which only has a default one filemark at EOT.
 1367 options         SA_IO_TIMEOUT=4
 1368 options         SA_SPACE_TIMEOUT=60
 1369 options         SA_REWIND_TIMEOUT=(2*60)
 1370 options         SA_ERASE_TIMEOUT=(4*60)
 1371 options         SA_1FM_AT_EOD
 1372 
 1373 # Optional timeout for the CAM processor target (pt) device
 1374 # This is specified in seconds.  The default is 60 seconds.
 1375 options         SCSI_PT_DEFAULT_TIMEOUT=60
 1376 
 1377 # Optional enable of doing SES passthrough on other devices (e.g., disks)
 1378 #
 1379 # Normally disabled because a lot of newer SCSI disks report themselves
 1380 # as having SES capabilities, but this can then clot up attempts to build
 1381 # a topology with the SES device that's on the box these drives are in....
 1382 options         SES_ENABLE_PASSTHROUGH
 1383 
 1384 
 1385 #####################################################################
 1386 # MISCELLANEOUS DEVICES AND OPTIONS
 1387 
 1388 device          pty             #BSD-style compatibility pseudo ttys
 1389 device          nmdm            #back-to-back tty devices
 1390 device          md              #Memory/malloc disk
 1391 device          snp             #Snoop device - to look at pty/vty/etc..
 1392 device          ccd             #Concatenated disk driver
 1393 device          firmware        #firmware(9) support
 1394 
 1395 # Kernel side iconv library
 1396 options         LIBICONV
 1397 
 1398 # Size of the kernel message buffer.  Should be N * pagesize.
 1399 options         MSGBUF_SIZE=40960
 1400 
 1401 
 1402 #####################################################################
 1403 # HARDWARE DEVICE CONFIGURATION
 1404 
 1405 # For ISA the required hints are listed.
 1406 # EISA, MCA, PCI, CardBus, SD/MMC and pccard are self identifying buses, so
 1407 # no hints are needed.
 1408 
 1409 #
 1410 # Mandatory devices:
 1411 #
 1412 
 1413 # These options are valid for other keyboard drivers as well.
 1414 options         KBD_DISABLE_KEYMAP_LOAD # refuse to load a keymap
 1415 options         KBD_INSTALL_CDEV        # install a CDEV entry in /dev
 1416 
 1417 device          kbdmux                  # keyboard multiplexer
 1418 options         KBDMUX_DFLT_KEYMAP      # specify the built-in keymap
 1419 makeoptions     KBDMUX_DFLT_KEYMAP=it.iso
 1420 
 1421 options         FB_DEBUG                # Frame buffer debugging
 1422 
 1423 device          splash                  # Splash screen and screen saver support
 1424 
 1425 # Various screen savers.
 1426 device          blank_saver
 1427 device          daemon_saver
 1428 device          dragon_saver
 1429 device          fade_saver
 1430 device          fire_saver
 1431 device          green_saver
 1432 device          logo_saver
 1433 device          rain_saver
 1434 device          snake_saver
 1435 device          star_saver
 1436 device          warp_saver
 1437 
 1438 # The syscons console driver (SCO color console compatible).
 1439 device          sc
 1440 hint.sc.0.at="isa"
 1441 options         MAXCONS=16              # number of virtual consoles
 1442 options         SC_ALT_MOUSE_IMAGE      # simplified mouse cursor in text mode
 1443 options         SC_DFLT_FONT            # compile font in
 1444 makeoptions     SC_DFLT_FONT=cp850
 1445 options         SC_DISABLE_KDBKEY       # disable `debug' key
 1446 options         SC_DISABLE_REBOOT       # disable reboot key sequence
 1447 options         SC_HISTORY_SIZE=200     # number of history buffer lines
 1448 options         SC_MOUSE_CHAR=0x3       # char code for text mode mouse cursor
 1449 options         SC_PIXEL_MODE           # add support for the raster text mode
 1450 
 1451 # The following options will let you change the default colors of syscons.
 1452 options         SC_NORM_ATTR=(FG_GREEN|BG_BLACK)
 1453 options         SC_NORM_REV_ATTR=(FG_YELLOW|BG_GREEN)
 1454 options         SC_KERNEL_CONS_ATTR=(FG_RED|BG_BLACK)
 1455 options         SC_KERNEL_CONS_REV_ATTR=(FG_BLACK|BG_RED)
 1456 
 1457 # The following options will let you change the default behavior of
 1458 # cut-n-paste feature
 1459 options         SC_CUT_SPACES2TABS      # convert leading spaces into tabs
 1460 options         SC_CUT_SEPCHARS=\"x09\" # set of characters that delimit words
 1461                                         # (default is single space - \"x20\")
 1462 
 1463 # If you have a two button mouse, you may want to add the following option
 1464 # to use the right button of the mouse to paste text.
 1465 options         SC_TWOBUTTON_MOUSE
 1466 
 1467 # You can selectively disable features in syscons.
 1468 options         SC_NO_CUTPASTE
 1469 options         SC_NO_FONT_LOADING
 1470 options         SC_NO_HISTORY
 1471 options         SC_NO_MODE_CHANGE
 1472 options         SC_NO_SYSMOUSE
 1473 options         SC_NO_SUSPEND_VTYSWITCH
 1474 
 1475 # `flags' for sc
 1476 #       0x80    Put the video card in the VESA 800x600 dots, 16 color mode
 1477 #       0x100   Probe for a keyboard device periodically if one is not present
 1478 
 1479 # Enable experimental features of the syscons terminal emulator (teken).
 1480 options         TEKEN_CONS25            # cons25-style terminal emulation
 1481 options         TEKEN_UTF8              # UTF-8 output handling
 1482 
 1483 #
 1484 # Optional devices:
 1485 #
 1486 
 1487 #
 1488 # SCSI host adapters:
 1489 #
 1490 # adv: All Narrow SCSI bus AdvanSys controllers.
 1491 # adw: Second Generation AdvanSys controllers including the ADV940UW.
 1492 # aha: Adaptec 154x/1535/1640
 1493 # ahb: Adaptec 174x EISA controllers
 1494 # ahc: Adaptec 274x/284x/2910/293x/294x/394x/3950x/3960x/398X/4944/
 1495 #      19160x/29160x, aic7770/aic78xx
 1496 # ahd: Adaptec 29320/39320 Controllers.
 1497 # aic: Adaptec 6260/6360, APA-1460 (PC Card), NEC PC9801-100 (C-BUS)
 1498 # bt:  Most Buslogic controllers: including BT-445, BT-54x, BT-64x, BT-74x,
 1499 #      BT-75x, BT-946, BT-948, BT-956, BT-958, SDC3211B, SDC3211F, SDC3222F
 1500 # esp: Emulex ESP, NCR 53C9x and QLogic FAS families based controllers
 1501 #      including the AMD Am53C974 (found on devices such as the Tekram
 1502 #      DC-390(T)) and the Sun ESP and FAS families of controllers
 1503 # isp: Qlogic ISP 1020, 1040 and 1040B PCI SCSI host adapters,
 1504 #      ISP 1240 Dual Ultra SCSI, ISP 1080 and 1280 (Dual) Ultra2,
 1505 #      ISP 12160 Ultra3 SCSI,
 1506 #      Qlogic ISP 2100 and ISP 2200 1Gb Fibre Channel host adapters.
 1507 #      Qlogic ISP 2300 and ISP 2312 2Gb Fibre Channel host adapters.
 1508 #      Qlogic ISP 2322 and ISP 6322 2Gb Fibre Channel host adapters.
 1509 # ispfw: Firmware module for Qlogic host adapters
 1510 # mpt: LSI-Logic MPT/Fusion 53c1020 or 53c1030 Ultra4
 1511 #      or FC9x9 Fibre Channel host adapters.
 1512 # ncr: NCR 53C810, 53C825 self-contained SCSI host adapters.
 1513 # sym: Symbios/Logic 53C8XX family of PCI-SCSI I/O processors:
 1514 #      53C810, 53C810A, 53C815, 53C825,  53C825A, 53C860, 53C875,
 1515 #      53C876, 53C885,  53C895, 53C895A, 53C896,  53C897, 53C1510D,
 1516 #      53C1010-33, 53C1010-66.
 1517 # trm: Tekram DC395U/UW/F DC315U adapters.
 1518 # wds: WD7000
 1519 
 1520 #
 1521 # Note that the order is important in order for Buslogic ISA/EISA cards to be
 1522 # probed correctly.
 1523 #
 1524 device          bt
 1525 hint.bt.0.at="isa"
 1526 hint.bt.0.port="0x330"
 1527 device          adv
 1528 hint.adv.0.at="isa"
 1529 device          adw
 1530 device          aha
 1531 hint.aha.0.at="isa"
 1532 device          aic
 1533 hint.aic.0.at="isa"
 1534 device          ahb
 1535 device          ahc
 1536 device          ahd
 1537 device          esp
 1538 device          iscsi_initiator
 1539 device          isp
 1540 hint.isp.0.disable="1"
 1541 hint.isp.0.role="3"
 1542 hint.isp.0.prefer_iomap="1"
 1543 hint.isp.0.prefer_memmap="1"
 1544 hint.isp.0.fwload_disable="1"
 1545 hint.isp.0.ignore_nvram="1"
 1546 hint.isp.0.fullduplex="1"
 1547 hint.isp.0.topology="lport"
 1548 hint.isp.0.topology="nport"
 1549 hint.isp.0.topology="lport-only"
 1550 hint.isp.0.topology="nport-only"
 1551 # we can't get u_int64_t types, nor can we get strings if it's got
 1552 # a leading 0x, hence this silly dodge.
 1553 hint.isp.0.portwnn="w50000000aaaa0000"
 1554 hint.isp.0.nodewnn="w50000000aaaa0001"
 1555 device          ispfw
 1556 device          mpt
 1557 device          ncr
 1558 device          sym
 1559 device          trm
 1560 device          wds
 1561 hint.wds.0.at="isa"
 1562 hint.wds.0.port="0x350"
 1563 hint.wds.0.irq="11"
 1564 hint.wds.0.drq="6"
 1565 
 1566 # The aic7xxx driver will attempt to use memory mapped I/O for all PCI
 1567 # controllers that have it configured only if this option is set. Unfortunately,
 1568 # this doesn't work on some motherboards, which prevents it from being the
 1569 # default.
 1570 options         AHC_ALLOW_MEMIO
 1571 
 1572 # Dump the contents of the ahc controller configuration PROM.
 1573 options         AHC_DUMP_EEPROM
 1574 
 1575 # Bitmap of units to enable targetmode operations.
 1576 options         AHC_TMODE_ENABLE
 1577 
 1578 # Compile in Aic7xxx Debugging code.
 1579 options         AHC_DEBUG
 1580 
 1581 # Aic7xxx driver debugging options. See sys/dev/aic7xxx/aic7xxx.h
 1582 options         AHC_DEBUG_OPTS
 1583 
 1584 # Print register bitfields in debug output.  Adds ~128k to driver
 1585 # See ahc(4).
 1586 options         AHC_REG_PRETTY_PRINT
 1587 
 1588 # Compile in aic79xx debugging code.
 1589 options         AHD_DEBUG
 1590 
 1591 # Aic79xx driver debugging options.  Adds ~215k to driver.  See ahd(4).
 1592 options         AHD_DEBUG_OPTS=0xFFFFFFFF
 1593 
 1594 # Print human-readable register definitions when debugging
 1595 options         AHD_REG_PRETTY_PRINT
 1596 
 1597 # Bitmap of units to enable targetmode operations.
 1598 options         AHD_TMODE_ENABLE
 1599 
 1600 # The adw driver will attempt to use memory mapped I/O for all PCI
 1601 # controllers that have it configured only if this option is set.
 1602 options         ADW_ALLOW_MEMIO
 1603 
 1604 # Options used in dev/iscsi (Software iSCSI stack)
 1605 #
 1606 options         ISCSI_INITIATOR_DEBUG=9
 1607 
 1608 # Options used in dev/isp/ (Qlogic SCSI/FC driver).
 1609 #
 1610 #       ISP_TARGET_MODE         -       enable target mode operation
 1611 #
 1612 options         ISP_TARGET_MODE=1
 1613 #
 1614 #       ISP_DEFAULT_ROLES       -       default role
 1615 #               none=0
 1616 #               target=1
 1617 #               initiator=2
 1618 #               both=3                  (not supported currently)
 1619 #
 1620 #       ISP_INTERNAL_TARGET             (trivial internal disk target, for testing)
 1621 #
 1622 options         ISP_DEFAULT_ROLES=0
 1623 
 1624 # Options used in dev/sym/ (Symbios SCSI driver).
 1625 #options        SYM_SETUP_LP_PROBE_MAP  #-Low Priority Probe Map (bits)
 1626                                         # Allows the ncr to take precedence
 1627                                         # 1 (1<<0) -> 810a, 860
 1628                                         # 2 (1<<1) -> 825a, 875, 885, 895
 1629                                         # 4 (1<<2) -> 895a, 896, 1510d
 1630 #options        SYM_SETUP_SCSI_DIFF     #-HVD support for 825a, 875, 885
 1631                                         # disabled:0 (default), enabled:1
 1632 #options        SYM_SETUP_PCI_PARITY    #-PCI parity checking
 1633                                         # disabled:0, enabled:1 (default)
 1634 #options        SYM_SETUP_MAX_LUN       #-Number of LUNs supported
 1635                                         # default:8, range:[1..64]
 1636 
 1637 # The 'dpt' driver provides support for old DPT controllers (http://www.dpt.com/).
 1638 # These have hardware RAID-{0,1,5} support, and do multi-initiator I/O.
 1639 # The DPT controllers are commonly re-licensed under other brand-names -
 1640 # some controllers by Olivetti, Dec, HP, AT&T, SNI, AST, Alphatronic, NEC and
 1641 # Compaq are actually DPT controllers.
 1642 #
 1643 # See src/sys/dev/dpt for debugging and other subtle options.
 1644 #  DPT_MEASURE_PERFORMANCE  Enables a set of (semi)invasive metrics. Various
 1645 #                           instruments are enabled.  The tools in
 1646 #                           /usr/sbin/dpt_* assume these to be enabled.
 1647 #  DPT_DEBUG_xxxx           These are controllable from sys/dev/dpt/dpt.h
 1648 #  DPT_RESET_HBA            Make "reset" actually reset the controller
 1649 #                           instead of fudging it.  Only enable this if you
 1650 #                           are 100% certain you need it.
 1651 
 1652 device          dpt
 1653 
 1654 # DPT options
 1655 #!CAM# options  DPT_MEASURE_PERFORMANCE
 1656 options         DPT_RESET_HBA
 1657 
 1658 #
 1659 # Compaq "CISS" RAID controllers (SmartRAID 5* series)
 1660 # These controllers have a SCSI-like interface, and require the
 1661 # CAM infrastructure.
 1662 #
 1663 device          ciss
 1664 
 1665 #
 1666 # Intel Integrated RAID controllers.
 1667 # This driver was developed and is maintained by Intel.  Contacts
 1668 # at Intel for this driver are
 1669 # "Kannanthanam, Boji T" <boji.t.kannanthanam@intel.com> and
 1670 # "Leubner, Achim" <achim.leubner@intel.com>.
 1671 #
 1672 device          iir
 1673 
 1674 #
 1675 # Mylex AcceleRAID and eXtremeRAID controllers with v6 and later
 1676 # firmware.  These controllers have a SCSI-like interface, and require
 1677 # the CAM infrastructure.
 1678 #
 1679 device          mly
 1680 
 1681 #
 1682 # Compaq Smart RAID, Mylex DAC960 and AMI MegaRAID controllers.  Only
 1683 # one entry is needed; the code will find and configure all supported
 1684 # controllers.
 1685 #
 1686 device          ida             # Compaq Smart RAID
 1687 device          mlx             # Mylex DAC960
 1688 device          amr             # AMI MegaRAID
 1689 device          amrp            # SCSI Passthrough interface (optional, CAM req.)
 1690 device          mfi             # LSI MegaRAID SAS
 1691 device          mfip            # LSI MegaRAID SAS passthrough, requires CAM
 1692 options         MFI_DEBUG
 1693 device          mrsas           # LSI/Avago MegaRAID SAS/SATA, 6Gb/s and 12Gb/s
 1694 
 1695 #
 1696 # 3ware ATA RAID
 1697 #
 1698 device          twe             # 3ware ATA RAID
 1699 
 1700 #
 1701 # Serial ATA host controllers:
 1702 #
 1703 # ahci: Advanced Host Controller Interface (AHCI) compatible
 1704 # mvs:  Marvell 88SX50XX/88SX60XX/88SX70XX/SoC controllers
 1705 # siis: SiliconImage SiI3124/SiI3132/SiI3531 controllers
 1706 #
 1707 # These drivers are part of cam(4) subsystem. They supersede less featured
 1708 # ata(4) subsystem drivers, supporting same hardware.
 1709 
 1710 device          ahci
 1711 device          mvs
 1712 device          siis
 1713 
 1714 #
 1715 # The 'ATA' driver supports all legacy ATA/ATAPI controllers, including
 1716 # PC Card devices. You only need one "device ata" for it to find all
 1717 # PCI and PC Card ATA/ATAPI devices on modern machines.
 1718 # Alternatively, individual bus and chipset drivers may be chosen by using
 1719 # the 'atacore' driver then selecting the drivers on a per vendor basis.
 1720 # For example to build a system which only supports a VIA chipset,
 1721 # omit 'ata' and include the 'atacore', 'atapci' and 'atavia' drivers.
 1722 device          ata
 1723 
 1724 # Modular ATA
 1725 #device         atacore         # Core ATA functionality
 1726 #device         atacard         # CARDBUS support
 1727 #device         atabus          # PC98 cbus support
 1728 #device         ataisa          # ISA bus support
 1729 #device         atapci          # PCI bus support; only generic chipset support
 1730 
 1731 # PCI ATA chipsets
 1732 #device         ataacard        # ACARD
 1733 #device         ataacerlabs     # Acer Labs Inc. (ALI)
 1734 #device         ataamd          # American Micro Devices (AMD)
 1735 #device         ataati          # ATI
 1736 #device         atacenatek      # Cenatek
 1737 #device         atacypress      # Cypress
 1738 #device         atacyrix        # Cyrix
 1739 #device         atahighpoint    # HighPoint
 1740 #device         ataintel        # Intel
 1741 #device         ataite          # Integrated Technology Inc. (ITE)
 1742 #device         atajmicron      # JMicron
 1743 #device         atamarvell      # Marvell
 1744 #device         atamicron       # Micron
 1745 #device         atanational     # National
 1746 #device         atanetcell      # NetCell
 1747 #device         atanvidia       # nVidia
 1748 #device         atapromise      # Promise
 1749 #device         ataserverworks  # ServerWorks
 1750 #device         atasiliconimage # Silicon Image Inc. (SiI) (formerly CMD)
 1751 #device         atasis          # Silicon Integrated Systems Corp.(SiS)
 1752 #device         atavia          # VIA Technologies Inc.
 1753 
 1754 #
 1755 # For older non-PCI, non-PnPBIOS systems, these are the hints lines to add:
 1756 hint.ata.0.at="isa"
 1757 hint.ata.0.port="0x1f0"
 1758 hint.ata.0.irq="14"
 1759 hint.ata.1.at="isa"
 1760 hint.ata.1.port="0x170"
 1761 hint.ata.1.irq="15"
 1762 
 1763 #
 1764 # The following options are valid on the ATA driver:
 1765 #
 1766 # ATA_STATIC_ID:        controller numbering is static ie depends on location
 1767 #                       else the device numbers are dynamically allocated.
 1768 
 1769 options         ATA_STATIC_ID
 1770 
 1771 #
 1772 # Standard floppy disk controllers and floppy tapes, supports
 1773 # the Y-E DATA External FDD (PC Card)
 1774 #
 1775 device          fdc
 1776 hint.fdc.0.at="isa"
 1777 hint.fdc.0.port="0x3F0"
 1778 hint.fdc.0.irq="6"
 1779 hint.fdc.0.drq="2"
 1780 #
 1781 # FDC_DEBUG enables floppy debugging.  Since the debug output is huge, you
 1782 # gotta turn it actually on by setting the variable fd_debug with DDB,
 1783 # however.
 1784 options         FDC_DEBUG
 1785 #
 1786 # Activate this line if you happen to have an Insight floppy tape.
 1787 # Probing them proved to be dangerous for people with floppy disks only,
 1788 # so it's "hidden" behind a flag:
 1789 #hint.fdc.0.flags="1"
 1790 
 1791 # Specify floppy devices
 1792 hint.fd.0.at="fdc0"
 1793 hint.fd.0.drive="0"
 1794 hint.fd.1.at="fdc0"
 1795 hint.fd.1.drive="1"
 1796 
 1797 #
 1798 # uart: newbusified driver for serial interfaces.  It consolidates the sio(4),
 1799 #       sab(4) and zs(4) drivers.
 1800 #
 1801 device          uart
 1802 
 1803 # Options for uart(4)
 1804 options         UART_PPS_ON_CTS         # Do time pulse capturing using CTS
 1805                                         # instead of DCD.
 1806 options         UART_POLL_FREQ          # Set polling rate, used when hw has
 1807                                         # no interrupt support (50 Hz default).
 1808 
 1809 # The following hint should only be used for pure ISA devices.  It is not
 1810 # needed otherwise.  Use of hints is strongly discouraged.
 1811 hint.uart.0.at="isa"
 1812 
 1813 # The following 3 hints are used when the UART is a system device (i.e., a
 1814 # console or debug port), but only on platforms that don't have any other
 1815 # means to pass the information to the kernel.  The unit number of the hint
 1816 # is only used to bundle the hints together.  There is no relation to the
 1817 # unit number of the probed UART.
 1818 hint.uart.0.port="0x3f8"
 1819 hint.uart.0.flags="0x10"
 1820 hint.uart.0.baud="115200"
 1821 
 1822 # `flags' for serial drivers that support consoles like sio(4) and uart(4):
 1823 #       0x10    enable console support for this unit.  Other console flags
 1824 #               (if applicable) are ignored unless this is set.  Enabling
 1825 #               console support does not make the unit the preferred console.
 1826 #               Boot with -h or set boot_serial=YES in the loader.  For sio(4)
 1827 #               specifically, the 0x20 flag can also be set (see above).
 1828 #               Currently, at most one unit can have console support; the
 1829 #               first one (in config file order) with this flag set is
 1830 #               preferred.  Setting this flag for sio0 gives the old behavior.
 1831 #       0x80    use this port for serial line gdb support in ddb.  Also known
 1832 #               as debug port.
 1833 #
 1834 
 1835 # Options for serial drivers that support consoles:
 1836 options         BREAK_TO_DEBUGGER       # A BREAK on a serial console goes to
 1837                                         # ddb, if available.
 1838 
 1839 # Solaris implements a new BREAK which is initiated by a character
 1840 # sequence CR ~ ^b which is similar to a familiar pattern used on
 1841 # Sun servers by the Remote Console.  There are FreeBSD extensions:
 1842 # CR ~ ^p requests force panic and CR ~ ^r requests a clean reboot.
 1843 options         ALT_BREAK_TO_DEBUGGER
 1844 
 1845 # Serial Communications Controller
 1846 # Supports the Siemens SAB 82532 and Zilog Z8530 multi-channel
 1847 # communications controllers.
 1848 device          scc
 1849 
 1850 # PCI Universal Communications driver
 1851 # Supports various multi port PCI I/O cards.
 1852 device          puc
 1853 
 1854 #
 1855 # Network interfaces:
 1856 #
 1857 # MII bus support is required for many PCI Ethernet NICs,
 1858 # namely those which use MII-compliant transceivers or implement
 1859 # transceiver control interfaces that operate like an MII.  Adding
 1860 # "device miibus" to the kernel config pulls in support for the generic
 1861 # miibus API, the common support for for bit-bang'ing the MII and all
 1862 # of the PHY drivers, including a generic one for PHYs that aren't
 1863 # specifically handled by an individual driver.  Support for specific
 1864 # PHYs may be built by adding "device mii", "device mii_bitbang" if
 1865 # needed by the NIC driver and then adding the appropriate PHY driver.
 1866 device          mii             # Minimal MII support
 1867 device          mii_bitbang     # Common module for bit-bang'ing the MII
 1868 device          miibus          # MII support w/ bit-bang'ing and all PHYs
 1869 
 1870 device          acphy           # Altima Communications AC101
 1871 device          amphy           # AMD AM79c873 / Davicom DM910{1,2}
 1872 device          atphy           # Attansic/Atheros F1
 1873 device          axphy           # Asix Semiconductor AX88x9x
 1874 device          bmtphy          # Broadcom BCM5201/BCM5202 and 3Com 3c905C
 1875 device          brgphy          # Broadcom BCM54xx/57xx 1000baseTX
 1876 device          ciphy           # Cicada/Vitesse CS/VSC8xxx
 1877 device          e1000phy        # Marvell 88E1000 1000/100/10-BT
 1878 device          gentbi          # Generic 10-bit 1000BASE-{LX,SX} fiber ifaces
 1879 device          icsphy          # ICS ICS1889-1893
 1880 device          ip1000phy       # IC Plus IP1000A/IP1001
 1881 device          jmphy           # JMicron JMP211/JMP202
 1882 device          lxtphy          # Level One LXT-970
 1883 device          mlphy           # Micro Linear 6692
 1884 device          nsgphy          # NatSemi DP8361/DP83865/DP83891
 1885 device          nsphy           # NatSemi DP83840A
 1886 device          nsphyter        # NatSemi DP83843/DP83815
 1887 device          pnaphy          # HomePNA
 1888 device          qsphy           # Quality Semiconductor QS6612
 1889 device          rdcphy          # RDC Semiconductor R6040
 1890 device          rgephy          # RealTek 8169S/8110S/8211B/8211C
 1891 device          rlphy           # RealTek 8139
 1892 device          rlswitch        # RealTek 8305
 1893 device          smcphy          # SMSC LAN91C111
 1894 device          tdkphy          # TDK 89Q2120
 1895 device          tlphy           # Texas Instruments ThunderLAN
 1896 device          truephy         # LSI TruePHY
 1897 device          xmphy           # XaQti XMAC II
 1898 
 1899 # an:   Aironet 4500/4800 802.11 wireless adapters. Supports the PCMCIA,
 1900 #       PCI and ISA varieties.
 1901 # ae:   Support for gigabit ethernet adapters based on the Attansic/Atheros
 1902 #       L2 PCI-Express FastEthernet controllers.
 1903 # age:  Support for gigabit ethernet adapters based on the Attansic/Atheros
 1904 #       L1 PCI express gigabit ethernet controllers.
 1905 # alc:  Support for Atheros AR8131/AR8132 PCIe ethernet controllers.
 1906 # ale:  Support for Atheros AR8121/AR8113/AR8114 PCIe ethernet controllers.
 1907 # ath:  Atheros a/b/g WiFi adapters (requires ath_hal and wlan)
 1908 # bce:  Broadcom NetXtreme II (BCM5706/BCM5708) PCI/PCIe Gigabit Ethernet
 1909 #       adapters.
 1910 # bfe:  Broadcom BCM4401 Ethernet adapter.
 1911 # bge:  Support for gigabit ethernet adapters based on the Broadcom
 1912 #       BCM570x family of controllers, including the 3Com 3c996-T,
 1913 #       the Netgear GA302T, the SysKonnect SK-9D21 and SK-9D41, and
 1914 #       the embedded gigE NICs on Dell PowerEdge 2550 servers.
 1915 # bxe:  Broadcom NetXtreme II (BCM5771X/BCM578XX) PCIe 10Gb Ethernet
 1916 #       adapters.
 1917 # bwi:  Broadcom BCM430* and BCM431* family of wireless adapters.
 1918 # bwn:  Broadcom BCM43xx family of wireless adapters.
 1919 # cas:  Sun Cassini/Cassini+ and National Semiconductor DP83065 Saturn
 1920 # cm:   Arcnet SMC COM90c26 / SMC COM90c56
 1921 #       (and SMC COM90c66 in '56 compatibility mode) adapters.
 1922 # cxgb: Chelsio T3 based 1GbE/10GbE PCIe Ethernet adapters.
 1923 # cxgbe:Chelsio T4, T5, and T6-based 1/10/25/40/100GbE PCIe Ethernet
 1924 #       adapters.
 1925 # cxgbev: Chelsio T4, T5, and T6-based PCIe Virtual Functions.
 1926 # dc:   Support for PCI fast ethernet adapters based on the DEC/Intel 21143
 1927 #       and various workalikes including:
 1928 #       the ADMtek AL981 Comet and AN985 Centaur, the ASIX Electronics
 1929 #       AX88140A and AX88141, the Davicom DM9100 and DM9102, the Lite-On
 1930 #       82c168 and 82c169 PNIC, the Lite-On/Macronix LC82C115 PNIC II
 1931 #       and the Macronix 98713/98713A/98715/98715A/98725 PMAC. This driver
 1932 #       replaces the old al, ax, dm, pn and mx drivers.  List of brands:
 1933 #       Digital DE500-BA, Kingston KNE100TX, D-Link DFE-570TX, SOHOware SFA110,
 1934 #       SVEC PN102-TX, CNet Pro110B, 120A, and 120B, Compex RL100-TX,
 1935 #       LinkSys LNE100TX, LNE100TX V2.0, Jaton XpressNet, Alfa Inc GFC2204,
 1936 #       KNE110TX.
 1937 # de:   Digital Equipment DC21040
 1938 # em:   Intel Pro/1000 Gigabit Ethernet 82542, 82543, 82544 based adapters.
 1939 # igb:  Intel Pro/1000 PCI Express Gigabit Ethernet: 82575 and later adapters.
 1940 # ep:   3Com 3C509, 3C529, 3C556, 3C562D, 3C563D, 3C572, 3C574X, 3C579, 3C589
 1941 #       and PC Card devices using these chipsets.
 1942 # ex:   Intel EtherExpress Pro/10 and other i82595-based adapters,
 1943 #       Olicom Ethernet PC Card devices.
 1944 # fe:   Fujitsu MB86960A/MB86965A Ethernet
 1945 # fea:  DEC DEFEA EISA FDDI adapter
 1946 # fpa:  Support for the Digital DEFPA PCI FDDI. `device fddi' is also needed.
 1947 # fxp:  Intel EtherExpress Pro/100B
 1948 #       (hint of prefer_iomap can be done to prefer I/O instead of Mem mapping)
 1949 # gem:  Apple GMAC/Sun ERI/Sun GEM
 1950 # hme:  Sun HME (Happy Meal Ethernet)
 1951 # jme:  JMicron JMC260 Fast Ethernet/JMC250 Gigabit Ethernet based adapters.
 1952 # le:   AMD Am7900 LANCE and Am79C9xx PCnet
 1953 # lge:  Support for PCI gigabit ethernet adapters based on the Level 1
 1954 #       LXT1001 NetCellerator chipset. This includes the D-Link DGE-500SX,
 1955 #       SMC TigerCard 1000 (SMC9462SX), and some Addtron cards.
 1956 # malo: Marvell Libertas wireless NICs.
 1957 # mwl:  Marvell 88W8363 802.11n wireless NICs.
 1958 #       Requires the mwl firmware module
 1959 # mwlfw: Marvell 88W8363 firmware
 1960 # msk:  Support for gigabit ethernet adapters based on the Marvell/SysKonnect
 1961 #       Yukon II Gigabit controllers, including 88E8021, 88E8022, 88E8061,
 1962 #       88E8062, 88E8035, 88E8036, 88E8038, 88E8050, 88E8052, 88E8053,
 1963 #       88E8055, 88E8056 and D-Link 560T/550SX.
 1964 # lmc:  Support for the LMC/SBE wide-area network interface cards.
 1965 # mlx5: Mellanox ConnectX-4 and ConnectX-4 LX IB and Eth shared code module.
 1966 # mlx5en:Mellanox ConnectX-4 and ConnectX-4 LX PCIe Ethernet adapters.
 1967 # my:   Myson Fast Ethernet (MTD80X, MTD89X)
 1968 # nge:  Support for PCI gigabit ethernet adapters based on the National
 1969 #       Semiconductor DP83820 and DP83821 chipset. This includes the
 1970 #       SMC EZ Card 1000 (SMC9462TX), D-Link DGE-500T, Asante FriendlyNet
 1971 #       GigaNIX 1000TA and 1000TPC, the Addtron AEG320T, the Surecom
 1972 #       EP-320G-TX and the Netgear GA622T.
 1973 # oce:  Emulex 10 Gbit adapters (OneConnect Ethernet)
 1974 # pcn:  Support for PCI fast ethernet adapters based on the AMD Am79c97x
 1975 #       PCnet-FAST, PCnet-FAST+, PCnet-FAST III, PCnet-PRO and PCnet-Home
 1976 #       chipsets. These can also be handled by the le(4) driver if the
 1977 #       pcn(4) driver is left out of the kernel. The le(4) driver does not
 1978 #       support the additional features like the MII bus and burst mode of
 1979 #       the PCnet-FAST and greater chipsets though.
 1980 # ral:  Ralink Technology IEEE 802.11 wireless adapter
 1981 # re:   RealTek 8139C+/8169/816xS/811xS/8101E PCI/PCIe Ethernet adapter
 1982 # rl:   Support for PCI fast ethernet adapters based on the RealTek 8129/8139
 1983 #       chipset.  Note that the RealTek driver defaults to using programmed
 1984 #       I/O to do register accesses because memory mapped mode seems to cause
 1985 #       severe lockups on SMP hardware.  This driver also supports the
 1986 #       Accton EN1207D `Cheetah' adapter, which uses a chip called
 1987 #       the MPX 5030/5038, which is either a RealTek in disguise or a
 1988 #       RealTek workalike.  Note that the D-Link DFE-530TX+ uses the RealTek
 1989 #       chipset and is supported by this driver, not the 'vr' driver.
 1990 # sf:   Support for Adaptec Duralink PCI fast ethernet adapters based on the
 1991 #       Adaptec AIC-6915 "starfire" controller.
 1992 #       This includes dual and quad port cards, as well as one 100baseFX card.
 1993 #       Most of these are 64-bit PCI devices, except for one single port
 1994 #       card which is 32-bit.
 1995 # sge:  Silicon Integrated Systems SiS190/191 Fast/Gigabit Ethernet adapter
 1996 # sis:  Support for NICs based on the Silicon Integrated Systems SiS 900,
 1997 #       SiS 7016 and NS DP83815 PCI fast ethernet controller chips.
 1998 # sk:   Support for the SysKonnect SK-984x series PCI gigabit ethernet NICs.
 1999 #       This includes the SK-9841 and SK-9842 single port cards (single mode
 2000 #       and multimode fiber) and the SK-9843 and SK-9844 dual port cards
 2001 #       (also single mode and multimode).
 2002 #       The driver will autodetect the number of ports on the card and
 2003 #       attach each one as a separate network interface.
 2004 # sn:   Support for ISA and PC Card Ethernet devices using the
 2005 #       SMC91C90/92/94/95 chips.
 2006 # ste:  Sundance Technologies ST201 PCI fast ethernet controller, includes
 2007 #       the D-Link DFE-550TX.
 2008 # stge: Support for gigabit ethernet adapters based on the Sundance/Tamarack
 2009 #       TC9021 family of controllers, including the Sundance ST2021/ST2023,
 2010 #       the Sundance/Tamarack TC9021, the D-Link DL-4000 and ASUS NX1101.
 2011 # ti:   Support for PCI gigabit ethernet NICs based on the Alteon Networks
 2012 #       Tigon 1 and Tigon 2 chipsets.  This includes the Alteon AceNIC, the
 2013 #       3Com 3c985, the Netgear GA620 and various others.  Note that you will
 2014 #       probably want to bump up kern.ipc.nmbclusters a lot to use this driver.
 2015 # tl:   Support for the Texas Instruments TNETE100 series 'ThunderLAN'
 2016 #       cards and integrated ethernet controllers.  This includes several
 2017 #       Compaq Netelligent 10/100 cards and the built-in ethernet controllers
 2018 #       in several Compaq Prosignia, Proliant and Deskpro systems.  It also
 2019 #       supports several Olicom 10Mbps and 10/100 boards.
 2020 # tx:   SMC 9432 TX, BTX and FTX cards. (SMC EtherPower II series)
 2021 # txp:  Support for 3Com 3cR990 cards with the "Typhoon" chipset
 2022 # vr:   Support for various fast ethernet adapters based on the VIA
 2023 #       Technologies VT3043 `Rhine I' and VT86C100A `Rhine II' chips,
 2024 #       including the D-Link DFE520TX and D-Link DFE530TX (see 'rl' for
 2025 #       DFE530TX+), the Hawking Technologies PN102TX, and the AOpen/Acer ALN-320.
 2026 # vte:  DM&P Vortex86 RDC R6040 Fast Ethernet
 2027 # vx:   3Com 3C590 and 3C595
 2028 # wb:   Support for fast ethernet adapters based on the Winbond W89C840F chip.
 2029 #       Note: this is not the same as the Winbond W89C940F, which is a
 2030 #       NE2000 clone.
 2031 # wi:   Lucent WaveLAN/IEEE 802.11 PCMCIA adapters. Note: this supports both
 2032 #       the PCMCIA and ISA cards: the ISA card is really a PCMCIA to ISA
 2033 #       bridge with a PCMCIA adapter plugged into it.
 2034 # xe:   Xircom/Intel EtherExpress Pro100/16 PC Card ethernet controller,
 2035 #       Accton Fast EtherCard-16, Compaq Netelligent 10/100 PC Card,
 2036 #       Toshiba 10/100 Ethernet PC Card, Xircom 16-bit Ethernet + Modem 56
 2037 # xl:   Support for the 3Com 3c900, 3c905, 3c905B and 3c905C (Fast)
 2038 #       Etherlink XL cards and integrated controllers.  This includes the
 2039 #       integrated 3c905B-TX chips in certain Dell Optiplex and Dell
 2040 #       Precision desktop machines and the integrated 3c905-TX chips
 2041 #       in Dell Latitude laptop docking stations.
 2042 #       Also supported: 3Com 3c980(C)-TX, 3Com 3cSOHO100-TX, 3Com 3c450-TX
 2043 
 2044 # Order for ISA/EISA devices is important here
 2045 
 2046 device          cm
 2047 hint.cm.0.at="isa"
 2048 hint.cm.0.port="0x2e0"
 2049 hint.cm.0.irq="9"
 2050 hint.cm.0.maddr="0xdc000"
 2051 device          ep
 2052 device          ex
 2053 device          fe
 2054 hint.fe.0.at="isa"
 2055 hint.fe.0.port="0x300"
 2056 device          fea
 2057 device          sn
 2058 hint.sn.0.at="isa"
 2059 hint.sn.0.port="0x300"
 2060 hint.sn.0.irq="10"
 2061 device          an
 2062 device          wi
 2063 device          xe
 2064 
 2065 # PCI Ethernet NICs that use the common MII bus controller code.
 2066 device          ae              # Attansic/Atheros L2 FastEthernet
 2067 device          age             # Attansic/Atheros L1 Gigabit Ethernet
 2068 device          alc             # Atheros AR8131/AR8132 Ethernet
 2069 device          ale             # Atheros AR8121/AR8113/AR8114 Ethernet
 2070 device          bce             # Broadcom BCM5706/BCM5708 Gigabit Ethernet
 2071 device          bfe             # Broadcom BCM440x 10/100 Ethernet
 2072 device          bge             # Broadcom BCM570xx Gigabit Ethernet
 2073 device          cas             # Sun Cassini/Cassini+ and NS DP83065 Saturn
 2074 device          dc              # DEC/Intel 21143 and various workalikes
 2075 device          et              # Agere ET1310 10/100/Gigabit Ethernet
 2076 device          fxp             # Intel EtherExpress PRO/100B (82557, 82558)
 2077 hint.fxp.0.prefer_iomap="0"
 2078 device          gem             # Apple GMAC/Sun ERI/Sun GEM
 2079 device          hme             # Sun HME (Happy Meal Ethernet)
 2080 device          jme             # JMicron JMC250 Gigabit/JMC260 Fast Ethernet
 2081 device          lge             # Level 1 LXT1001 gigabit Ethernet
 2082 #device         mlx5            # Shared code module between IB and Ethernet
 2083 #device         mlx5en          # Mellanox ConnectX-4 and ConnectX-4 LX
 2084 device          msk             # Marvell/SysKonnect Yukon II Gigabit Ethernet
 2085 device          my              # Myson Fast Ethernet (MTD80X, MTD89X)
 2086 device          nge             # NatSemi DP83820 gigabit Ethernet
 2087 device          re              # RealTek 8139C+/8169/8169S/8110S
 2088 device          rl              # RealTek 8129/8139
 2089 device          pcn             # AMD Am79C97x PCI 10/100 NICs
 2090 device          sf              # Adaptec AIC-6915 (``Starfire'')
 2091 device          sge             # Silicon Integrated Systems SiS190/191
 2092 device          sis             # Silicon Integrated Systems SiS 900/SiS 7016
 2093 device          sk              # SysKonnect SK-984x & SK-982x gigabit Ethernet
 2094 device          ste             # Sundance ST201 (D-Link DFE-550TX)
 2095 device          stge            # Sundance/Tamarack TC9021 gigabit Ethernet
 2096 device          tl              # Texas Instruments ThunderLAN
 2097 device          tx              # SMC EtherPower II (83c170 ``EPIC'')
 2098 device          vr              # VIA Rhine, Rhine II
 2099 device          vte             # DM&P Vortex86 RDC R6040 Fast Ethernet
 2100 device          wb              # Winbond W89C840F
 2101 device          xl              # 3Com 3c90x (``Boomerang'', ``Cyclone'')
 2102 
 2103 # PCI Ethernet NICs.
 2104 device          cxgb            # Chelsio T3 10 Gigabit Ethernet
 2105 device          cxgb_t3fw       # Chelsio T3 10 Gigabit Ethernet firmware
 2106 device          cxgbe           # Chelsio T4-T6 1/10/25/40/100 Gigabit Ethernet
 2107 device          cxgbev          # Chelsio T4-T6 Virtual Functions
 2108 device          de              # DEC/Intel DC21x4x (``Tulip'')
 2109 device          em              # Intel Pro/1000 Gigabit Ethernet
 2110 device          igb             # Intel Pro/1000 PCIE Gigabit Ethernet
 2111 device          ixgb            # Intel Pro/10Gbe PCI-X Ethernet
 2112 device          ix              # Intel Pro/10Gbe PCIE Ethernet
 2113 device          ixv             # Intel Pro/10Gbe PCIE Ethernet VF
 2114 device          le              # AMD Am7900 LANCE and Am79C9xx PCnet
 2115 device          mxge            # Myricom Myri-10G 10GbE NIC
 2116 device          nxge            # Neterion Xframe 10GbE Server/Storage Adapter
 2117 device          oce             # Emulex 10 GbE (OneConnect Ethernet)
 2118 device          ti              # Alteon Networks Tigon I/II gigabit Ethernet
 2119 device          txp             # 3Com 3cR990 (``Typhoon'')
 2120 device          vx              # 3Com 3c590, 3c595 (``Vortex'')
 2121 device          vxge            # Exar/Neterion XFrame 3100 10GbE
 2122 
 2123 # PCI FDDI NICs.
 2124 device          fpa
 2125 
 2126 # PCI WAN adapters.
 2127 device          lmc
 2128 
 2129 # PCI IEEE 802.11 Wireless NICs
 2130 device          ath             # Atheros pci/cardbus NIC's
 2131 device          ath_hal         # pci/cardbus chip support
 2132 #device         ath_ar5210      # AR5210 chips
 2133 #device         ath_ar5211      # AR5211 chips
 2134 #device         ath_ar5212      # AR5212 chips
 2135 #device         ath_rf2413
 2136 #device         ath_rf2417
 2137 #device         ath_rf2425
 2138 #device         ath_rf5111
 2139 #device         ath_rf5112
 2140 #device         ath_rf5413
 2141 #device         ath_ar5416      # AR5416 chips
 2142 options         AH_SUPPORT_AR5416       # enable AR5416 tx/rx descriptors
 2143 # All of the AR5212 parts have a problem when paired with the AR71xx
 2144 # CPUS.  These parts have a bug that triggers a fatal bus error on the AR71xx
 2145 # only.  Details of the exact nature of the bug are sketchy, but some can be
 2146 # found at https://forum.openwrt.org/viewtopic.php?pid=70060 on pages 4, 5 and
 2147 # 6.  This option enables this workaround.  There is a performance penalty
 2148 # for this work around, but without it things don't work at all.  The DMA
 2149 # from the card usually bursts 128 bytes, but on the affected CPUs, only
 2150 # 4 are safe.
 2151 options         AH_RXCFG_SDMAMW_4BYTES
 2152 #device         ath_ar9160      # AR9160 chips
 2153 #device         ath_ar9280      # AR9280 chips
 2154 #device         ath_ar9285      # AR9285 chips
 2155 device          ath_rate_sample # SampleRate tx rate control for ath
 2156 device          bwi             # Broadcom BCM430* BCM431*
 2157 device          bwn             # Broadcom BCM43xx
 2158 device          malo            # Marvell Libertas wireless NICs.
 2159 device          mwl             # Marvell 88W8363 802.11n wireless NICs.
 2160 device          mwlfw
 2161 device          ral             # Ralink Technology RT2500 wireless NICs.
 2162 
 2163 # Use sf_buf(9) interface for jumbo buffers on ti(4) controllers.
 2164 #options        TI_SF_BUF_JUMBO
 2165 # Turn on the header splitting option for the ti(4) driver firmware.  This
 2166 # only works for Tigon II chips, and has no effect for Tigon I chips.
 2167 # This option requires the TI_SF_BUF_JUMBO option above.
 2168 #options        TI_JUMBO_HDRSPLIT
 2169 
 2170 # These two options allow manipulating the mbuf cluster size and mbuf size,
 2171 # respectively.  Be very careful with NIC driver modules when changing
 2172 # these from their default values, because that can potentially cause a
 2173 # mismatch between the mbuf size assumed by the kernel and the mbuf size
 2174 # assumed by a module.  The only driver that currently has the ability to
 2175 # detect a mismatch is ti(4).
 2176 options         MCLSHIFT=12     # mbuf cluster shift in bits, 12 == 4KB
 2177 options         MSIZE=512       # mbuf size in bytes
 2178 
 2179 #
 2180 # ATM related options (Cranor version)
 2181 # (note: this driver cannot be used with the HARP ATM stack)
 2182 #
 2183 # The `en' device provides support for Efficient Networks (ENI)
 2184 # ENI-155 PCI midway cards, and the Adaptec 155Mbps PCI ATM cards (ANA-59x0).
 2185 #
 2186 # The `hatm' device provides support for Fore/Marconi HE155 and HE622
 2187 # ATM PCI cards.
 2188 #
 2189 # The `fatm' device provides support for Fore PCA200E ATM PCI cards.
 2190 #
 2191 # The `patm' device provides support for IDT77252 based cards like
 2192 # ProSum's ProATM-155 and ProATM-25 and IDT's evaluation boards.
 2193 #
 2194 # atm device provides generic atm functions and is required for
 2195 # atm devices.
 2196 # NATM enables the netnatm protocol family that can be used to
 2197 # bypass TCP/IP.
 2198 #
 2199 # utopia provides the access to the ATM PHY chips and is required for en,
 2200 # hatm and fatm.
 2201 #
 2202 # the current driver supports only PVC operations (no atm-arp, no multicast).
 2203 # for more details, please read the original documents at
 2204 # http://www.ccrc.wustl.edu/pub/chuck/tech/bsdatm/bsdatm.html
 2205 #
 2206 device          atm
 2207 device          en
 2208 device          fatm                    #Fore PCA200E
 2209 device          hatm                    #Fore/Marconi HE155/622
 2210 device          patm                    #IDT77252 cards (ProATM and IDT)
 2211 device          utopia                  #ATM PHY driver
 2212 options         NATM                    #native ATM
 2213 
 2214 options         LIBMBPOOL               #needed by patm, iatm
 2215 
 2216 #
 2217 # Sound drivers
 2218 #
 2219 # sound: The generic sound driver.
 2220 #
 2221 
 2222 device          sound
 2223 
 2224 #
 2225 # snd_*: Device-specific drivers.
 2226 #
 2227 # The flags of the device tell the device a bit more info about the
 2228 # device that normally is obtained through the PnP interface.
 2229 #       bit  2..0   secondary DMA channel;
 2230 #       bit  4      set if the board uses two dma channels;
 2231 #       bit 15..8   board type, overrides autodetection; leave it
 2232 #                   zero if don't know what to put in (and you don't,
 2233 #                   since this is unsupported at the moment...).
 2234 #
 2235 # snd_ad1816:           Analog Devices AD1816 ISA PnP/non-PnP.
 2236 # snd_als4000:          Avance Logic ALS4000 PCI.
 2237 # snd_atiixp:           ATI IXP 200/300/400 PCI.
 2238 # snd_audiocs:          Crystal Semiconductor CS4231 SBus/EBus. Only
 2239 #                       for sparc64.
 2240 # snd_cmi:              CMedia CMI8338/CMI8738 PCI.
 2241 # snd_cs4281:           Crystal Semiconductor CS4281 PCI.
 2242 # snd_csa:              Crystal Semiconductor CS461x/428x PCI. (except
 2243 #                       4281)
 2244 # snd_ds1:              Yamaha DS-1 PCI.
 2245 # snd_emu10k1:          Creative EMU10K1 PCI and EMU10K2 (Audigy) PCI.
 2246 # snd_emu10kx:          Creative SoundBlaster Live! and Audigy
 2247 # snd_envy24:           VIA Envy24 and compatible, needs snd_spicds.
 2248 # snd_envy24ht:         VIA Envy24HT and compatible, needs snd_spicds.
 2249 # snd_es137x:           Ensoniq AudioPCI ES137x PCI.
 2250 # snd_ess:              Ensoniq ESS ISA PnP/non-PnP, to be used in
 2251 #                       conjunction with snd_sbc.
 2252 # snd_fm801:            Forte Media FM801 PCI.
 2253 # snd_gusc:             Gravis UltraSound ISA PnP/non-PnP.
 2254 # snd_hda:              Intel High Definition Audio (Controller) and
 2255 #                       compatible.
 2256 # snd_hdspe:            RME HDSPe AIO and RayDAT.
 2257 # snd_ich:              Intel ICH AC'97 and some more audio controllers
 2258 #                       embedded in a chipset, for example nVidia
 2259 #                       nForce controllers.
 2260 # snd_maestro:          ESS Technology Maestro-1/2x PCI.
 2261 # snd_maestro3:         ESS Technology Maestro-3/Allegro PCI.
 2262 # snd_mss:              Microsoft Sound System ISA PnP/non-PnP.
 2263 # snd_neomagic:         Neomagic 256 AV/ZX PCI.
 2264 # snd_sb16:             Creative SoundBlaster16, to be used in
 2265 #                       conjunction with snd_sbc.
 2266 # snd_sb8:              Creative SoundBlaster (pre-16), to be used in
 2267 #                       conjunction with snd_sbc.
 2268 # snd_sbc:              Creative SoundBlaster ISA PnP/non-PnP.
 2269 #                       Supports ESS and Avance ISA chips as well.
 2270 # snd_solo:             ESS Solo-1x PCI.
 2271 # snd_spicds:           SPI codec driver, needed by Envy24/Envy24HT drivers.
 2272 # snd_t4dwave:          Trident 4DWave DX/NX PCI, Sis 7018 PCI and Acer Labs
 2273 #                       M5451 PCI.
 2274 # snd_uaudio:           USB audio.
 2275 # snd_via8233:          VIA VT8233x PCI.
 2276 # snd_via82c686:        VIA VT82C686A PCI.
 2277 # snd_vibes:            S3 Sonicvibes PCI.
 2278 
 2279 device          snd_ad1816
 2280 device          snd_als4000
 2281 device          snd_atiixp
 2282 #device         snd_audiocs
 2283 device          snd_cmi
 2284 device          snd_cs4281
 2285 device          snd_csa
 2286 device          snd_ds1
 2287 device          snd_emu10k1
 2288 device          snd_emu10kx
 2289 device          snd_envy24
 2290 device          snd_envy24ht
 2291 device          snd_es137x
 2292 device          snd_ess
 2293 device          snd_fm801
 2294 device          snd_gusc
 2295 device          snd_hda
 2296 device          snd_hdspe
 2297 device          snd_ich
 2298 device          snd_maestro
 2299 device          snd_maestro3
 2300 device          snd_mss
 2301 device          snd_neomagic
 2302 device          snd_sb16
 2303 device          snd_sb8
 2304 device          snd_sbc
 2305 device          snd_solo
 2306 device          snd_spicds
 2307 device          snd_t4dwave
 2308 device          snd_uaudio
 2309 device          snd_via8233
 2310 device          snd_via82c686
 2311 device          snd_vibes
 2312 
 2313 # For non-PnP sound cards:
 2314 hint.pcm.0.at="isa"
 2315 hint.pcm.0.irq="10"
 2316 hint.pcm.0.drq="1"
 2317 hint.pcm.0.flags="0x0"
 2318 hint.sbc.0.at="isa"
 2319 hint.sbc.0.port="0x220"
 2320 hint.sbc.0.irq="5"
 2321 hint.sbc.0.drq="1"
 2322 hint.sbc.0.flags="0x15"
 2323 hint.gusc.0.at="isa"
 2324 hint.gusc.0.port="0x220"
 2325 hint.gusc.0.irq="5"
 2326 hint.gusc.0.drq="1"
 2327 hint.gusc.0.flags="0x13"
 2328 
 2329 #
 2330 # Following options are intended for debugging/testing purposes:
 2331 #
 2332 # SND_DEBUG                    Enable extra debugging code that includes
 2333 #                              sanity checking and possible increase of
 2334 #                              verbosity.
 2335 #
 2336 # SND_DIAGNOSTIC               Similar in a spirit of INVARIANTS/DIAGNOSTIC,
 2337 #                              zero tolerance against inconsistencies.
 2338 #
 2339 # SND_FEEDER_MULTIFORMAT       By default, only 16/32 bit feeders are compiled
 2340 #                              in. This options enable most feeder converters
 2341 #                              except for 8bit. WARNING: May bloat the kernel.
 2342 #
 2343 # SND_FEEDER_FULL_MULTIFORMAT  Ditto, but includes 8bit feeders as well.
 2344 #
 2345 # SND_FEEDER_RATE_HP           (feeder_rate) High precision 64bit arithmetic
 2346 #                              as much as possible (the default trying to
 2347 #                              avoid it). Possible slowdown.
 2348 #
 2349 # SND_PCM_64                   (Only applicable for i386/32bit arch)
 2350 #                              Process 32bit samples through 64bit
 2351 #                              integer/arithmetic. Slight increase of dynamic
 2352 #                              range at a cost of possible slowdown.
 2353 #
 2354 # SND_OLDSTEREO                Only 2 channels are allowed, effectively
 2355 #                              disabling multichannel processing.
 2356 #
 2357 options         SND_DEBUG
 2358 options         SND_DIAGNOSTIC
 2359 options         SND_FEEDER_MULTIFORMAT
 2360 options         SND_FEEDER_FULL_MULTIFORMAT
 2361 options         SND_FEEDER_RATE_HP
 2362 options         SND_PCM_64
 2363 options         SND_OLDSTEREO
 2364 
 2365 #
 2366 # IEEE-488 hardware:
 2367 # pcii:         PCIIA cards (uPD7210 based isa cards)
 2368 # tnt4882:      National Instruments PCI-GPIB card.
 2369 
 2370 device  pcii
 2371 hint.pcii.0.at="isa"
 2372 hint.pcii.0.port="0x2e1"
 2373 hint.pcii.0.irq="5"
 2374 hint.pcii.0.drq="1"
 2375 
 2376 device  tnt4882
 2377 
 2378 #
 2379 # Miscellaneous hardware:
 2380 #
 2381 # scd: Sony CD-ROM using proprietary (non-ATAPI) interface
 2382 # mcd: Mitsumi CD-ROM using proprietary (non-ATAPI) interface
 2383 # bktr: Brooktree bt848/848a/849a/878/879 video capture and TV Tuner board
 2384 # joy: joystick (including IO DATA PCJOY PC Card joystick)
 2385 # cmx: OmniKey CardMan 4040 pccard smartcard reader
 2386 
 2387 # Mitsumi CD-ROM
 2388 device          mcd
 2389 hint.mcd.0.at="isa"
 2390 hint.mcd.0.port="0x300"
 2391 # for the Sony CDU31/33A CDROM
 2392 device          scd
 2393 hint.scd.0.at="isa"
 2394 hint.scd.0.port="0x230"
 2395 device          joy                     # PnP aware, hints for non-PnP only
 2396 hint.joy.0.at="isa"
 2397 hint.joy.0.port="0x201"
 2398 device          cmx
 2399 
 2400 #
 2401 # The 'bktr' device is a PCI video capture device using the Brooktree
 2402 # bt848/bt848a/bt849a/bt878/bt879 chipset. When used with a TV Tuner it forms a
 2403 # TV card, e.g. Miro PC/TV, Hauppauge WinCast/TV WinTV, VideoLogic Captivator,
 2404 # Intel Smart Video III, AverMedia, IMS Turbo, FlyVideo.
 2405 #
 2406 # options       OVERRIDE_CARD=xxx
 2407 # options       OVERRIDE_TUNER=xxx
 2408 # options       OVERRIDE_MSP=1
 2409 # options       OVERRIDE_DBX=1
 2410 # These options can be used to override the auto detection
 2411 # The current values for xxx are found in src/sys/dev/bktr/bktr_card.h
 2412 # Using sysctl(8) run-time overrides on a per-card basis can be made
 2413 #
 2414 # options       BROOKTREE_SYSTEM_DEFAULT=BROOKTREE_PAL
 2415 # or
 2416 # options       BROOKTREE_SYSTEM_DEFAULT=BROOKTREE_NTSC
 2417 # Specifies the default video capture mode.
 2418 # This is required for Dual Crystal (28&35MHz) boards where PAL is used
 2419 # to prevent hangs during initialization, e.g. VideoLogic Captivator PCI.
 2420 #
 2421 # options       BKTR_USE_PLL
 2422 # This is required for PAL or SECAM boards with a 28MHz crystal and no 35MHz
 2423 # crystal, e.g. some new Bt878 cards.
 2424 #
 2425 # options       BKTR_GPIO_ACCESS
 2426 # This enables IOCTLs which give user level access to the GPIO port.
 2427 #
 2428 # options       BKTR_NO_MSP_RESET
 2429 # Prevents the MSP34xx reset. Good if you initialize the MSP in another OS first
 2430 #
 2431 # options       BKTR_430_FX_MODE
 2432 # Switch Bt878/879 cards into Intel 430FX chipset compatibility mode.
 2433 #
 2434 # options       BKTR_SIS_VIA_MODE
 2435 # Switch Bt878/879 cards into SIS/VIA chipset compatibility mode which is
 2436 # needed for some old SiS and VIA chipset motherboards.
 2437 # This also allows Bt878/879 chips to work on old OPTi (<1997) chipset
 2438 # motherboards and motherboards with bad or incomplete PCI 2.1 support.
 2439 # As a rough guess, old = before 1998
 2440 #
 2441 # options       BKTR_NEW_MSP34XX_DRIVER
 2442 # Use new, more complete initialization scheme for the msp34* soundchip.
 2443 # Should fix stereo autodetection if the old driver does only output
 2444 # mono sound.
 2445 
 2446 #
 2447 # options       BKTR_USE_FREEBSD_SMBUS
 2448 # Compile with FreeBSD SMBus implementation
 2449 #
 2450 # Brooktree driver has been ported to the new I2C framework. Thus,
 2451 # you'll need to have the following 3 lines in the kernel config.
 2452 #     device smbus
 2453 #     device iicbus
 2454 #     device iicbb
 2455 #     device iicsmb
 2456 # The iic and smb devices are only needed if you want to control other
 2457 # I2C slaves connected to the external connector of some cards.
 2458 #
 2459 device          bktr
 2460  
 2461 #
 2462 # PC Card/PCMCIA and Cardbus
 2463 #
 2464 # cbb: pci/cardbus bridge implementing YENTA interface
 2465 # pccard: pccard slots
 2466 # cardbus: cardbus slots
 2467 device          cbb
 2468 device          pccard
 2469 device          cardbus
 2470 
 2471 #
 2472 # MMC/SD
 2473 #
 2474 # mmc           MMC/SD bus
 2475 # mmcsd         MMC/SD memory card
 2476 # sdhci         Generic PCI SD Host Controller
 2477 #
 2478 device          mmc
 2479 device          mmcsd
 2480 device          sdhci
 2481 
 2482 #
 2483 # SMB bus
 2484 #
 2485 # System Management Bus support is provided by the 'smbus' device.
 2486 # Access to the SMBus device is via the 'smb' device (/dev/smb*),
 2487 # which is a child of the 'smbus' device.
 2488 #
 2489 # Supported devices:
 2490 # smb           standard I/O through /dev/smb*
 2491 #
 2492 # Supported SMB interfaces:
 2493 # iicsmb        I2C to SMB bridge with any iicbus interface
 2494 # bktr          brooktree848 I2C hardware interface
 2495 # intpm         Intel PIIX4 (82371AB, 82443MX) Power Management Unit
 2496 # alpm          Acer Aladdin-IV/V/Pro2 Power Management Unit
 2497 # ichsmb        Intel ICH SMBus controller chips (82801AA, 82801AB, 82801BA)
 2498 # viapm         VIA VT82C586B/596B/686A and VT8233 Power Management Unit
 2499 # amdpm         AMD 756 Power Management Unit
 2500 # amdsmb        AMD 8111 SMBus 2.0 Controller
 2501 # nfpm          NVIDIA nForce Power Management Unit
 2502 # nfsmb         NVIDIA nForce2/3/4 MCP SMBus 2.0 Controller
 2503 # ismt          Intel SMBus 2.0 controller chips (on Atom S1200, C2000)
 2504 #
 2505 device          smbus           # Bus support, required for smb below.
 2506 
 2507 device          intpm
 2508 device          alpm
 2509 device          ichsmb
 2510 device          viapm
 2511 device          amdpm
 2512 device          amdsmb
 2513 device          nfpm
 2514 device          nfsmb
 2515 device          ismt
 2516 
 2517 device          smb
 2518 
 2519 # SMBus peripheral devices
 2520 #
 2521 # jedec_dimm    Asset and temperature reporting for DDR3 and DDR4 DIMMs
 2522 # jedec_ts      Temperature Sensor compliant with JEDEC Standard 21-C
 2523 #
 2524 device          jedec_dimm
 2525 device          jedec_ts
 2526 
 2527 # I2C Bus
 2528 #
 2529 # Philips i2c bus support is provided by the `iicbus' device.
 2530 #
 2531 # Supported devices:
 2532 # ic    i2c network interface
 2533 # iic   i2c standard io
 2534 # iicsmb i2c to smb bridge. Allow i2c i/o with smb commands.
 2535 # iicoc simple polling driver for OpenCores I2C controller
 2536 #
 2537 # Supported interfaces:
 2538 # bktr  brooktree848 I2C software interface
 2539 #
 2540 # Other:
 2541 # iicbb generic I2C bit-banging code (needed by lpbb, bktr)
 2542 #
 2543 device          iicbus          # Bus support, required for ic/iic/iicsmb below.
 2544 device          iicbb
 2545 
 2546 device          ic
 2547 device          iic
 2548 device          iicsmb          # smb over i2c bridge
 2549 device          iicoc           # OpenCores I2C controller support
 2550 
 2551 # I2C peripheral devices
 2552 #
 2553 # ds133x        Dallas Semiconductor DS1337, DS1338 and DS1339 RTC
 2554 # ds1374        Dallas Semiconductor DS1374 RTC
 2555 # ds1672        Dallas Semiconductor DS1672 RTC
 2556 # s35390a       Seiko Instruments S-35390A RTC
 2557 #
 2558 device          ds133x
 2559 device          ds1374
 2560 device          ds1672
 2561 device          s35390a
 2562 
 2563 # Parallel-Port Bus
 2564 #
 2565 # Parallel port bus support is provided by the `ppbus' device.
 2566 # Multiple devices may be attached to the parallel port, devices
 2567 # are automatically probed and attached when found.
 2568 #
 2569 # Supported devices:
 2570 # vpo   Iomega Zip Drive
 2571 #       Requires SCSI disk support ('scbus' and 'da'), best
 2572 #       performance is achieved with ports in EPP 1.9 mode.
 2573 # lpt   Parallel Printer
 2574 # plip  Parallel network interface
 2575 # ppi   General-purpose I/O ("Geek Port") + IEEE1284 I/O
 2576 # pps   Pulse per second Timing Interface
 2577 # lpbb  Philips official parallel port I2C bit-banging interface
 2578 # pcfclock Parallel port clock driver.
 2579 #
 2580 # Supported interfaces:
 2581 # ppc   ISA-bus parallel port interfaces.
 2582 #
 2583 
 2584 options         PPC_PROBE_CHIPSET # Enable chipset specific detection
 2585                                   # (see flags in ppc(4))
 2586 options         DEBUG_1284      # IEEE1284 signaling protocol debug
 2587 options         PERIPH_1284     # Makes your computer act as an IEEE1284
 2588                                 # compliant peripheral
 2589 options         DONTPROBE_1284  # Avoid boot detection of PnP parallel devices
 2590 options         VP0_DEBUG       # ZIP/ZIP+ debug
 2591 options         LPT_DEBUG       # Printer driver debug
 2592 options         PPC_DEBUG       # Parallel chipset level debug
 2593 options         PLIP_DEBUG      # Parallel network IP interface debug
 2594 options         PCFCLOCK_VERBOSE         # Verbose pcfclock driver
 2595 options         PCFCLOCK_MAX_RETRIES=5   # Maximum read tries (default 10)
 2596 
 2597 device          ppc
 2598 hint.ppc.0.at="isa"
 2599 hint.ppc.0.irq="7"
 2600 device          ppbus
 2601 device          vpo
 2602 device          lpt
 2603 device          plip
 2604 device          ppi
 2605 device          pps
 2606 device          lpbb
 2607 device          pcfclock
 2608 
 2609 # Kernel BOOTP support
 2610 
 2611 options         BOOTP           # Use BOOTP to obtain IP address/hostname
 2612                                 # Requires NFSCLIENT and NFS_ROOT
 2613 options         BOOTP_NFSROOT   # NFS mount root filesystem using BOOTP info
 2614 options         BOOTP_NFSV3     # Use NFS v3 to NFS mount root
 2615 options         BOOTP_COMPAT    # Workaround for broken bootp daemons.
 2616 options         BOOTP_WIRED_TO=fxp0 # Use interface fxp0 for BOOTP
 2617 options         BOOTP_BLOCKSIZE=8192 # Override NFS block size
 2618 
 2619 #
 2620 # Add software watchdog routines.
 2621 #
 2622 options         SW_WATCHDOG
 2623 
 2624 #
 2625 # Add the software deadlock resolver thread.
 2626 #
 2627 options         DEADLKRES
 2628 
 2629 #
 2630 # Disable swapping of stack pages.  This option removes all
 2631 # code which actually performs swapping, so it's not possible to turn
 2632 # it back on at run-time.
 2633 #
 2634 # This is sometimes usable for systems which don't have any swap space
 2635 # (see also sysctls "vm.defer_swapspace_pageouts" and
 2636 # "vm.disable_swapspace_pageouts")
 2637 #
 2638 #options        NO_SWAPPING
 2639 
 2640 # Set the number of sf_bufs to allocate. sf_bufs are virtual buffers
 2641 # for sendfile(2) that are used to map file VM pages, and normally
 2642 # default to a quantity that is roughly 16*MAXUSERS+512. You would
 2643 # typically want about 4 of these for each simultaneous file send.
 2644 #
 2645 options         NSFBUFS=1024
 2646 
 2647 #
 2648 # Enable extra debugging code for locks.  This stores the filename and
 2649 # line of whatever acquired the lock in the lock itself, and changes a
 2650 # number of function calls to pass around the relevant data.  This is
 2651 # not at all useful unless you are debugging lock code.  Also note
 2652 # that it is likely to break e.g. fstat(1) unless you recompile your
 2653 # userland with -DDEBUG_LOCKS as well.
 2654 #
 2655 options         DEBUG_LOCKS
 2656 
 2657 
 2658 #####################################################################
 2659 # USB support
 2660 # UHCI controller
 2661 device          uhci
 2662 # OHCI controller
 2663 device          ohci
 2664 # EHCI controller
 2665 device          ehci
 2666 # XHCI controller
 2667 device          xhci
 2668 # SL811 Controller
 2669 #device         slhci
 2670 # General USB code (mandatory for USB)
 2671 device          usb
 2672 #
 2673 # USB Double Bulk Pipe devices
 2674 device          udbp
 2675 # USB Fm Radio
 2676 device          ufm
 2677 # USB LED
 2678 device          uled
 2679 # Human Interface Device (anything with buttons and dials)
 2680 device          uhid
 2681 # USB keyboard
 2682 device          ukbd
 2683 # USB printer
 2684 device          ulpt
 2685 # USB mass storage driver (Requires scbus and da)
 2686 device          umass
 2687 # USB mass storage driver for device-side mode
 2688 device          usfs
 2689 # USB support for Belkin F5U109 and Magic Control Technology serial adapters
 2690 device          umct
 2691 # USB modem support
 2692 device          umodem
 2693 # USB mouse
 2694 device          ums
 2695 # USB touchpad(s)
 2696 device          atp
 2697 device          wsp
 2698 # eGalax USB touch screen
 2699 device          uep
 2700 # Diamond Rio 500 MP3 player
 2701 device          urio
 2702 #
 2703 # USB serial support
 2704 device          ucom
 2705 # USB support for 3G modem cards by Option, Novatel, Huawei and Sierra
 2706 device          u3g
 2707 # USB support for Technologies ARK3116 based serial adapters
 2708 device          uark
 2709 # USB support for Belkin F5U103 and compatible serial adapters
 2710 device          ubsa
 2711 # USB support for serial adapters based on the FT8U100AX and FT8U232AM
 2712 device          uftdi
 2713 # USB support for some Windows CE based serial communication.
 2714 device          uipaq
 2715 # USB support for Prolific PL-2303 serial adapters
 2716 device          uplcom
 2717 # USB support for Silicon Laboratories CP2101/CP2102 based USB serial adapters
 2718 device          uslcom
 2719 # USB Visor and Palm devices
 2720 device          uvisor
 2721 # USB serial support for DDI pocket's PHS
 2722 device          uvscom
 2723 #
 2724 # USB ethernet support
 2725 device          uether
 2726 # ADMtek USB ethernet. Supports the LinkSys USB100TX,
 2727 # the Billionton USB100, the Melco LU-ATX, the D-Link DSB-650TX
 2728 # and the SMC 2202USB. Also works with the ADMtek AN986 Pegasus
 2729 # eval board.
 2730 device          aue
 2731 
 2732 # ASIX Electronics AX88172 USB 2.0 ethernet driver. Used in the
 2733 # LinkSys USB200M and various other adapters.
 2734 device          axe
 2735 # ASIX Electronics AX88178A/AX88179 USB 2.0/3.0 gigabit ethernet driver.
 2736 device          axge
 2737 
 2738 #
 2739 # Devices which communicate using Ethernet over USB, particularly
 2740 # Communication Device Class (CDC) Ethernet specification. Supports
 2741 # Sharp Zaurus PDAs, some DOCSIS cable modems and so on.
 2742 device          cdce
 2743 #
 2744 # CATC USB-EL1201A USB ethernet. Supports the CATC Netmate
 2745 # and Netmate II, and the Belkin F5U111.
 2746 device          cue
 2747 #
 2748 # Kawasaki LSI ethernet. Supports the LinkSys USB10T,
 2749 # Entrega USB-NET-E45, Peracom Ethernet Adapter, the
 2750 # 3Com 3c19250, the ADS Technologies USB-10BT, the ATen UC10T,
 2751 # the Netgear EA101, the D-Link DSB-650, the SMC 2102USB
 2752 # and 2104USB, and the Corega USB-T.
 2753 device          kue
 2754 #
 2755 # RealTek RTL8150 USB to fast ethernet. Supports the Melco LUA-KTX
 2756 # and the GREEN HOUSE GH-USB100B.
 2757 device          rue
 2758 #
 2759 # Davicom DM9601E USB to fast ethernet. Supports the Corega FEther USB-TXC.
 2760 device          udav
 2761 #
 2762 # Moschip MCS7730/MCS7840 USB to fast ethernet. Supports the Sitecom LN030.
 2763 device          mos
 2764 #
 2765 # HSxPA devices from Option N.V
 2766 device          uhso
 2767 
 2768 # Realtek RTL8188SU/RTL8191SU/RTL8192SU wireless driver
 2769 device          rsu
 2770 #
 2771 # Ralink Technology RT2501USB/RT2601USB wireless driver
 2772 device          rum
 2773 # Ralink Technology RT2700U/RT2800U/RT3000U wireless driver
 2774 device          run
 2775 #
 2776 # Atheros AR5523 wireless driver
 2777 device          uath
 2778 #
 2779 # Conexant/Intersil PrismGT wireless driver
 2780 device          upgt
 2781 #
 2782 # Ralink Technology RT2500USB wireless driver
 2783 device          ural
 2784 #
 2785 # RNDIS USB ethernet driver
 2786 device          urndis
 2787 # Realtek RTL8187B/L wireless driver
 2788 device          urtw
 2789 #
 2790 # Realtek RTL8188CU/RTL8192CU wireless driver
 2791 device          urtwn
 2792 #
 2793 # ZyDas ZD1211/ZD1211B wireless driver
 2794 device          zyd
 2795 #
 2796 # Sierra USB wireless driver
 2797 device          usie
 2798 
 2799 # 
 2800 # debugging options for the USB subsystem
 2801 #
 2802 options         USB_DEBUG
 2803 options         U3G_DEBUG
 2804 
 2805 # options for ukbd:
 2806 options         UKBD_DFLT_KEYMAP        # specify the built-in keymap
 2807 makeoptions     UKBD_DFLT_KEYMAP=it.iso
 2808 
 2809 # options for uplcom:
 2810 options         UPLCOM_INTR_INTERVAL=100        # interrupt pipe interval
 2811                                                 # in milliseconds
 2812 
 2813 # options for uvscom:
 2814 options         UVSCOM_DEFAULT_OPKTSIZE=8       # default output packet size
 2815 options         UVSCOM_INTR_INTERVAL=100        # interrupt pipe interval
 2816                                                 # in milliseconds
 2817 
 2818 #####################################################################
 2819 # FireWire support
 2820 
 2821 device          firewire        # FireWire bus code
 2822 device          sbp             # SCSI over Firewire (Requires scbus and da)
 2823 device          sbp_targ        # SBP-2 Target mode  (Requires scbus and targ)
 2824 device          fwe             # Ethernet over FireWire (non-standard!)
 2825 device          fwip            # IP over FireWire (RFC2734 and RFC3146)
 2826 
 2827 #####################################################################
 2828 # dcons support (Dumb Console Device)
 2829 
 2830 device          dcons                   # dumb console driver
 2831 device          dcons_crom              # FireWire attachment
 2832 options         DCONS_BUF_SIZE=16384    # buffer size
 2833 options         DCONS_POLL_HZ=100       # polling rate
 2834 options         DCONS_FORCE_CONSOLE=0   # force to be the primary console
 2835 options         DCONS_FORCE_GDB=1       # force to be the gdb device
 2836 
 2837 #####################################################################
 2838 # crypto subsystem
 2839 #
 2840 # This is a port of the OpenBSD crypto framework.  Include this when
 2841 # configuring IPSEC and when you have a h/w crypto device to accelerate
 2842 # user applications that link to OpenSSL.
 2843 #
 2844 # Drivers are ports from OpenBSD with some simple enhancements that have
 2845 # been fed back to OpenBSD.
 2846 
 2847 device          crypto          # core crypto support
 2848 device          cryptodev       # /dev/crypto for access to h/w
 2849 
 2850 device          rndtest         # FIPS 140-2 entropy tester
 2851 
 2852 device          hifn            # Hifn 7951, 7781, etc.
 2853 options         HIFN_DEBUG      # enable debugging support: hw.hifn.debug
 2854 options         HIFN_RNDTEST    # enable rndtest support
 2855 
 2856 device          ubsec           # Broadcom 5501, 5601, 58xx
 2857 options         UBSEC_DEBUG     # enable debugging support: hw.ubsec.debug
 2858 options         UBSEC_RNDTEST   # enable rndtest support
 2859 
 2860 #####################################################################
 2861 
 2862 
 2863 #
 2864 # Embedded system options:
 2865 #
 2866 # An embedded system might want to run something other than init.
 2867 options         INIT_PATH=/sbin/init:/rescue/init
 2868 
 2869 # Debug options
 2870 options         BUS_DEBUG       # enable newbus debugging
 2871 options         DEBUG_VFS_LOCKS # enable VFS lock debugging
 2872 options         SOCKBUF_DEBUG   # enable sockbuf last record/mb tail checking
 2873 
 2874 #
 2875 # Verbose SYSINIT
 2876 #
 2877 # Make the SYSINIT process performed by mi_startup() verbose.  This is very
 2878 # useful when porting to a new architecture.  If DDB is also enabled, this
 2879 # will print function names instead of addresses.
 2880 options         VERBOSE_SYSINIT
 2881 
 2882 #####################################################################
 2883 # SYSV IPC KERNEL PARAMETERS
 2884 #
 2885 # Maximum number of System V semaphores that can be used on the system at
 2886 # one time.
 2887 options         SEMMNI=11
 2888 
 2889 # Total number of semaphores system wide
 2890 options         SEMMNS=61
 2891 
 2892 # Total number of undo structures in system
 2893 options         SEMMNU=31
 2894 
 2895 # Maximum number of System V semaphores that can be used by a single process
 2896 # at one time.
 2897 options         SEMMSL=61
 2898 
 2899 # Maximum number of operations that can be outstanding on a single System V
 2900 # semaphore at one time.
 2901 options         SEMOPM=101
 2902 
 2903 # Maximum number of undo operations that can be outstanding on a single
 2904 # System V semaphore at one time.
 2905 options         SEMUME=11
 2906 
 2907 # Maximum number of shared memory pages system wide.
 2908 options         SHMALL=1025
 2909 
 2910 # Maximum size, in bytes, of a single System V shared memory region.
 2911 options         SHMMAX=(SHMMAXPGS*PAGE_SIZE+1)
 2912 options         SHMMAXPGS=1025
 2913 
 2914 # Minimum size, in bytes, of a single System V shared memory region.
 2915 options         SHMMIN=2
 2916 
 2917 # Maximum number of shared memory regions that can be used on the system
 2918 # at one time.
 2919 options         SHMMNI=33
 2920 
 2921 # Maximum number of System V shared memory regions that can be attached to
 2922 # a single process at one time.
 2923 options         SHMSEG=9
 2924 
 2925 # Compress user core dumps.
 2926 options         COMPRESS_USER_CORES
 2927 # required to compress file output from kernel for COMPRESS_USER_CORES.
 2928 device          gzio        
 2929 
 2930 # Set the amount of time (in seconds) the system will wait before
 2931 # rebooting automatically when a kernel panic occurs.  If set to (-1),
 2932 # the system will wait indefinitely until a key is pressed on the
 2933 # console.
 2934 options         PANIC_REBOOT_WAIT_TIME=16
 2935 
 2936 # Attempt to bypass the buffer cache and put data directly into the
 2937 # userland buffer for read operation when O_DIRECT flag is set on the
 2938 # file.  Both offset and length of the read operation must be
 2939 # multiples of the physical media sector size.
 2940 #
 2941 options         DIRECTIO
 2942 
 2943 # Specify a lower limit for the number of swap I/O buffers.  They are
 2944 # (among other things) used when bypassing the buffer cache due to
 2945 # DIRECTIO kernel option enabled and O_DIRECT flag set on file.
 2946 #
 2947 options         NSWBUF_MIN=120
 2948 
 2949 #####################################################################
 2950 
 2951 # More undocumented options for linting.
 2952 # Note that documenting these is not considered an affront.
 2953 
 2954 options         CAM_DEBUG_DELAY
 2955 
 2956 # VFS cluster debugging.
 2957 options         CLUSTERDEBUG
 2958 
 2959 options         DEBUG
 2960 
 2961 # Kernel filelock debugging.
 2962 options         LOCKF_DEBUG
 2963 
 2964 # System V compatible message queues
 2965 # Please note that the values provided here are used to test kernel
 2966 # building.  The defaults in the sources provide almost the same numbers.
 2967 # MSGSSZ must be a power of 2 between 8 and 1024.
 2968 options         MSGMNB=2049     # Max number of chars in queue
 2969 options         MSGMNI=41       # Max number of message queue identifiers
 2970 options         MSGSEG=2049     # Max number of message segments
 2971 options         MSGSSZ=16       # Size of a message segment
 2972 options         MSGTQL=41       # Max number of messages in system
 2973 
 2974 options         NBUF=512        # Number of buffer headers
 2975 
 2976 options         SCSI_NCR_DEBUG
 2977 options         SCSI_NCR_MAX_SYNC=10000
 2978 options         SCSI_NCR_MAX_WIDE=1
 2979 options         SCSI_NCR_MYADDR=7
 2980 
 2981 options         SC_DEBUG_LEVEL=5        # Syscons debug level
 2982 options         SC_RENDER_DEBUG # syscons rendering debugging
 2983 
 2984 options         VFS_BIO_DEBUG   # VFS buffer I/O debugging
 2985 
 2986 options         KSTACK_MAX_PAGES=32 # Maximum pages to give the kernel stack
 2987 options         KSTACK_USAGE_PROF
 2988 
 2989 # Adaptec Array Controller driver options
 2990 options         AAC_DEBUG       # Debugging levels:
 2991                                 # 0 - quiet, only emit warnings
 2992                                 # 1 - noisy, emit major function
 2993                                 #     points and things done
 2994                                 # 2 - extremely noisy, emit trace
 2995                                 #     items in loops, etc.
 2996 
 2997 # Resource Accounting
 2998 options         RACCT
 2999 
 3000 # Resource Limits
 3001 options         RCTL
 3002 
 3003 # Yet more undocumented options for linting.
 3004 # BKTR_ALLOC_PAGES has no effect except to cause warnings, and
 3005 # BROOKTREE_ALLOC_PAGES hasn't actually been superseded by it, since the
 3006 # driver still mostly spells this option BROOKTREE_ALLOC_PAGES.
 3007 ##options       BKTR_ALLOC_PAGES=(217*4+1)
 3008 options         BROOKTREE_ALLOC_PAGES=(217*4+1)
 3009 options         MAXFILES=999
 3010 
 3011 # Random number generator
 3012 options         RANDOM_YARROW   # Yarrow RNG
 3013 ##options       RANDOM_FORTUNA  # Fortuna RNG - not yet implemented
 3014 options         RANDOM_DEBUG    # Debugging messages
 3015 options         RANDOM_RWFILE   # Read and write entropy cache
 3016 
 3017 # Intel em(4) driver
 3018 options         EM_MULTIQUEUE # Activate multiqueue features/disable MSI-X

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