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

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    1 # $FreeBSD: releng/9.1/sys/conf/NOTES 237317 2012-06-20 14:36:09Z mav $
    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 options         GEOM_AES                # Don't use, use GEOM_BDE
  143 options         GEOM_BDE                # Disk encryption.
  144 options         GEOM_BSD                # BSD disklabels
  145 options         GEOM_CACHE              # Disk cache.
  146 options         GEOM_CONCAT             # Disk concatenation.
  147 options         GEOM_ELI                # Disk encryption.
  148 options         GEOM_FOX                # Redundant path mitigation
  149 options         GEOM_GATE               # Userland services.
  150 options         GEOM_JOURNAL            # Journaling.
  151 options         GEOM_LABEL              # Providers labelization.
  152 options         GEOM_LINUX_LVM          # Linux LVM2 volumes
  153 options         GEOM_MBR                # DOS/MBR partitioning
  154 options         GEOM_MIRROR             # Disk mirroring.
  155 options         GEOM_MULTIPATH          # Disk multipath
  156 options         GEOM_NOP                # Test class.
  157 options         GEOM_PART_APM           # Apple partitioning
  158 options         GEOM_PART_BSD           # BSD disklabel
  159 options         GEOM_PART_EBR           # Extended Boot Records
  160 options         GEOM_PART_EBR_COMPAT    # Backward compatible partition names
  161 options         GEOM_PART_GPT           # GPT partitioning
  162 options         GEOM_PART_LDM           # Logical Disk Manager
  163 options         GEOM_PART_MBR           # MBR partitioning
  164 options         GEOM_PART_PC98          # PC-9800 disk partitioning
  165 options         GEOM_PART_VTOC8         # SMI VTOC8 disk label
  166 options         GEOM_PC98               # NEC PC9800 partitioning
  167 options         GEOM_RAID               # Soft RAID functionality.
  168 options         GEOM_RAID3              # RAID3 functionality.
  169 options         GEOM_SHSEC              # Shared secret.
  170 options         GEOM_STRIPE             # Disk striping.
  171 options         GEOM_SUNLABEL           # Sun/Solaris partitioning
  172 options         GEOM_UZIP               # Read-only compressed disks
  173 options         GEOM_VIRSTOR            # Virtual storage.
  174 options         GEOM_VOL                # Volume names from UFS superblock
  175 options         GEOM_ZERO               # Performance testing helper.
  176 
  177 #
  178 # The root device and filesystem type can be compiled in;
  179 # this provides a fallback option if the root device cannot
  180 # be correctly guessed by the bootstrap code, or an override if
  181 # the RB_DFLTROOT flag (-r) is specified when booting the kernel.
  182 #
  183 options         ROOTDEVNAME=\"ufs:da0s2e\"
  184 
  185 
  186 #####################################################################
  187 # Scheduler options:
  188 #
  189 # Specifying one of SCHED_4BSD or SCHED_ULE is mandatory.  These options
  190 # select which scheduler is compiled in.
  191 #
  192 # SCHED_4BSD is the historical, proven, BSD scheduler.  It has a global run
  193 # queue and no CPU affinity which makes it suboptimal for SMP.  It has very
  194 # good interactivity and priority selection.
  195 #
  196 # SCHED_ULE provides significant performance advantages over 4BSD on many
  197 # workloads on SMP machines.  It supports cpu-affinity, per-cpu runqueues
  198 # and scheduler locks.  It also has a stronger notion of interactivity 
  199 # which leads to better responsiveness even on uniprocessor machines.  This
  200 # is the default scheduler.
  201 #
  202 # SCHED_STATS is a debugging option which keeps some stats in the sysctl
  203 # tree at 'kern.sched.stats' and is useful for debugging scheduling decisions.
  204 #
  205 options         SCHED_4BSD
  206 options         SCHED_STATS
  207 #options        SCHED_ULE
  208 
  209 #####################################################################
  210 # SMP OPTIONS:
  211 #
  212 # SMP enables building of a Symmetric MultiProcessor Kernel.
  213 
  214 # Mandatory:
  215 options         SMP                     # Symmetric MultiProcessor Kernel
  216 
  217 # MAXCPU defines the maximum number of CPUs that can boot in the system.
  218 # A default value should be already present, for every architecture.
  219 options         MAXCPU=32
  220 
  221 # ADAPTIVE_MUTEXES changes the behavior of blocking mutexes to spin
  222 # if the thread that currently owns the mutex is executing on another
  223 # CPU.  This behaviour is enabled by default, so this option can be used
  224 # to disable it.
  225 options         NO_ADAPTIVE_MUTEXES
  226 
  227 # ADAPTIVE_RWLOCKS changes the behavior of reader/writer locks to spin
  228 # if the thread that currently owns the rwlock is executing on another
  229 # CPU.  This behaviour is enabled by default, so this option can be used
  230 # to disable it.
  231 options         NO_ADAPTIVE_RWLOCKS
  232 
  233 # ADAPTIVE_SX changes the behavior of sx locks to spin if the thread that
  234 # currently owns the sx lock is executing on another CPU.
  235 # This behaviour is enabled by default, so this option can be used to
  236 # disable it.
  237 options         NO_ADAPTIVE_SX
  238 
  239 # MUTEX_NOINLINE forces mutex operations to call functions to perform each
  240 # operation rather than inlining the simple cases.  This can be used to
  241 # shrink the size of the kernel text segment.  Note that this behavior is
  242 # already implied by the INVARIANT_SUPPORT, INVARIANTS, KTR, LOCK_PROFILING,
  243 # and WITNESS options.
  244 options         MUTEX_NOINLINE
  245 
  246 # RWLOCK_NOINLINE forces rwlock operations to call functions to perform each
  247 # operation rather than inlining the simple cases.  This can be used to
  248 # shrink the size of the kernel text segment.  Note that this behavior is
  249 # already implied by the INVARIANT_SUPPORT, INVARIANTS, KTR, LOCK_PROFILING,
  250 # and WITNESS options.
  251 options         RWLOCK_NOINLINE
  252 
  253 # SX_NOINLINE forces sx lock 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         SX_NOINLINE
  259 
  260 # SMP Debugging Options:
  261 #
  262 # PREEMPTION allows the threads that are in the kernel to be preempted by
  263 #         higher priority [interrupt] threads.  It helps with interactivity
  264 #         and allows interrupt threads to run sooner rather than waiting.
  265 #         WARNING! Only tested on amd64 and i386.
  266 # FULL_PREEMPTION instructs the kernel to preempt non-realtime kernel
  267 #         threads.  Its sole use is to expose race conditions and other
  268 #         bugs during development.  Enabling this option will reduce
  269 #         performance and increase the frequency of kernel panics by
  270 #         design.  If you aren't sure that you need it then you don't.
  271 #         Relies on the PREEMPTION option.  DON'T TURN THIS ON.
  272 # MUTEX_DEBUG enables various extra assertions in the mutex code.
  273 # SLEEPQUEUE_PROFILING enables rudimentary profiling of the hash table
  274 #         used to hold active sleep queues as well as sleep wait message
  275 #         frequency.
  276 # TURNSTILE_PROFILING enables rudimentary profiling of the hash table
  277 #         used to hold active lock queues.
  278 # UMTX_PROFILING enables rudimentary profiling of the hash table used 
  279           to hold active lock queues.
  280 # WITNESS enables the witness code which detects deadlocks and cycles
  281 #         during locking operations.
  282 # WITNESS_KDB causes the witness code to drop into the kernel debugger if
  283 #         a lock hierarchy violation occurs or if locks are held when going to
  284 #         sleep.
  285 # WITNESS_SKIPSPIN disables the witness checks on spin mutexes.
  286 options         PREEMPTION
  287 options         FULL_PREEMPTION
  288 options         MUTEX_DEBUG
  289 options         WITNESS
  290 options         WITNESS_KDB
  291 options         WITNESS_SKIPSPIN
  292 
  293 # LOCK_PROFILING - Profiling locks.  See LOCK_PROFILING(9) for details.
  294 options         LOCK_PROFILING
  295 # Set the number of buffers and the hash size.  The hash size MUST be larger
  296 # than the number of buffers.  Hash size should be prime.
  297 options         MPROF_BUFFERS="1536"
  298 options         MPROF_HASH_SIZE="1543"
  299 
  300 # Profiling for internal hash tables.
  301 options         SLEEPQUEUE_PROFILING
  302 options         TURNSTILE_PROFILING
  303 options         UMTX_PROFILING
  304 
  305 
  306 #####################################################################
  307 # COMPATIBILITY OPTIONS
  308 
  309 #
  310 # Implement system calls compatible with 4.3BSD and older versions of
  311 # FreeBSD.  You probably do NOT want to remove this as much current code
  312 # still relies on the 4.3 emulation.  Note that some architectures that
  313 # are supported by FreeBSD do not include support for certain important
  314 # aspects of this compatibility option, namely those related to the
  315 # signal delivery mechanism.
  316 #
  317 options         COMPAT_43
  318 
  319 # Old tty interface.
  320 options         COMPAT_43TTY
  321 
  322 # Note that as a general rule, COMPAT_FREEBSD<n> depends on
  323 # COMPAT_FREEBSD<n+1>, COMPAT_FREEBSD<n+2>, etc.
  324 
  325 # Enable FreeBSD4 compatibility syscalls
  326 options         COMPAT_FREEBSD4
  327 
  328 # Enable FreeBSD5 compatibility syscalls
  329 options         COMPAT_FREEBSD5
  330 
  331 # Enable FreeBSD6 compatibility syscalls
  332 options         COMPAT_FREEBSD6
  333 
  334 # Enable FreeBSD7 compatibility syscalls
  335 options         COMPAT_FREEBSD7
  336 
  337 #
  338 # These three options provide support for System V Interface
  339 # Definition-style interprocess communication, in the form of shared
  340 # memory, semaphores, and message queues, respectively.
  341 #
  342 options         SYSVSHM
  343 options         SYSVSEM
  344 options         SYSVMSG
  345 
  346 
  347 #####################################################################
  348 # DEBUGGING OPTIONS
  349 
  350 #
  351 # Compile with kernel debugger related code.
  352 #
  353 options         KDB
  354 
  355 #
  356 # Print a stack trace of the current thread on the console for a panic.
  357 #
  358 options         KDB_TRACE
  359 
  360 #
  361 # Don't enter the debugger for a panic. Intended for unattended operation
  362 # where you may want to enter the debugger from the console, but still want
  363 # the machine to recover from a panic.
  364 #
  365 options         KDB_UNATTENDED
  366 
  367 #
  368 # Enable the ddb debugger backend.
  369 #
  370 options         DDB
  371 
  372 #
  373 # Print the numerical value of symbols in addition to the symbolic
  374 # representation.
  375 #
  376 options         DDB_NUMSYM
  377 
  378 #
  379 # Enable the remote gdb debugger backend.
  380 #
  381 options         GDB
  382 
  383 #
  384 # SYSCTL_DEBUG enables a 'sysctl' debug tree that can be used to dump the
  385 # contents of the registered sysctl nodes on the console.  It is disabled by
  386 # default because it generates excessively verbose console output that can
  387 # interfere with serial console operation.
  388 #
  389 options         SYSCTL_DEBUG
  390 
  391 #
  392 # NO_SYSCTL_DESCR omits the sysctl node descriptions to save space in the
  393 # resulting kernel.
  394 options         NO_SYSCTL_DESCR
  395 
  396 #
  397 # MALLOC_DEBUG_MAXZONES enables multiple uma zones for malloc(9)
  398 # allocations that are smaller than a page.  The purpose is to isolate
  399 # different malloc types into hash classes, so that any buffer
  400 # overruns or use-after-free will usually only affect memory from
  401 # malloc types in that hash class.  This is purely a debugging tool;
  402 # by varying the hash function and tracking which hash class was
  403 # corrupted, the intersection of the hash classes from each instance
  404 # will point to a single malloc type that is being misused.  At this
  405 # point inspection or memguard(9) can be used to catch the offending
  406 # code.
  407 #
  408 options         MALLOC_DEBUG_MAXZONES=8
  409 
  410 #
  411 # DEBUG_MEMGUARD builds and enables memguard(9), a replacement allocator
  412 # for the kernel used to detect modify-after-free scenarios.  See the
  413 # memguard(9) man page for more information on usage.
  414 #
  415 options         DEBUG_MEMGUARD
  416 
  417 #
  418 # DEBUG_REDZONE enables buffer underflows and buffer overflows detection for
  419 # malloc(9).
  420 #
  421 options         DEBUG_REDZONE
  422 
  423 #
  424 # KTRACE enables the system-call tracing facility ktrace(2).  To be more
  425 # SMP-friendly, KTRACE uses a worker thread to process most trace events
  426 # asynchronously to the thread generating the event.  This requires a
  427 # pre-allocated store of objects representing trace events.  The
  428 # KTRACE_REQUEST_POOL option specifies the initial size of this store.
  429 # The size of the pool can be adjusted both at boottime and runtime via
  430 # the kern.ktrace_request_pool tunable and sysctl.
  431 #
  432 options         KTRACE                  #kernel tracing
  433 options         KTRACE_REQUEST_POOL=101
  434 
  435 #
  436 # KTR is a kernel tracing facility imported from BSD/OS.  It is
  437 # enabled with the KTR option.  KTR_ENTRIES defines the number of
  438 # entries in the circular trace buffer; it must be a power of two.
  439 # KTR_COMPILE defines the mask of events to compile into the kernel as
  440 # defined by the KTR_* constants in <sys/ktr.h>.  KTR_MASK defines the
  441 # initial value of the ktr_mask variable which determines at runtime
  442 # what events to trace.  KTR_CPUMASK determines which CPU's log
  443 # events, with bit X corresponding to CPU X.  The layout of the string
  444 # passed as KTR_CPUMASK must match a serie of bitmasks each of them
  445 # separated by the ", " characters (ie:
  446 # KTR_CPUMASK=("0xAF, 0xFFFFFFFFFFFFFFFF")).  KTR_VERBOSE enables
  447 # dumping of KTR events to the console by default.  This functionality
  448 # can be toggled via the debug.ktr_verbose sysctl and defaults to off
  449 # if KTR_VERBOSE is not defined.  See ktr(4) and ktrdump(8) for details.
  450 #
  451 options         KTR
  452 options         KTR_ENTRIES=1024
  453 options         KTR_COMPILE=(KTR_INTR|KTR_PROC)
  454 options         KTR_MASK=KTR_INTR
  455 options         KTR_CPUMASK=("0x3")
  456 options         KTR_VERBOSE
  457 
  458 #
  459 # ALQ(9) is a facility for the asynchronous queuing of records from the kernel
  460 # to a vnode, and is employed by services such as ktr(4) to produce trace
  461 # files based on a kernel event stream.  Records are written asynchronously
  462 # in a worker thread.
  463 #
  464 options         ALQ
  465 options         KTR_ALQ
  466 
  467 #
  468 # The INVARIANTS option is used in a number of source files to enable
  469 # extra sanity checking of internal structures.  This support is not
  470 # enabled by default because of the extra time it would take to check
  471 # for these conditions, which can only occur as a result of
  472 # programming errors.
  473 #
  474 options         INVARIANTS
  475 
  476 #
  477 # The INVARIANT_SUPPORT option makes us compile in support for
  478 # verifying some of the internal structures.  It is a prerequisite for
  479 # 'INVARIANTS', as enabling 'INVARIANTS' will make these functions be
  480 # called.  The intent is that you can set 'INVARIANTS' for single
  481 # source files (by changing the source file or specifying it on the
  482 # command line) if you have 'INVARIANT_SUPPORT' enabled.  Also, if you
  483 # wish to build a kernel module with 'INVARIANTS', then adding
  484 # 'INVARIANT_SUPPORT' to your kernel will provide all the necessary
  485 # infrastructure without the added overhead.
  486 #
  487 options         INVARIANT_SUPPORT
  488 
  489 #
  490 # The DIAGNOSTIC option is used to enable extra debugging information
  491 # from some parts of the kernel.  As this makes everything more noisy,
  492 # it is disabled by default.
  493 #
  494 options         DIAGNOSTIC
  495 
  496 #
  497 # REGRESSION causes optional kernel interfaces necessary only for regression
  498 # testing to be enabled.  These interfaces may constitute security risks
  499 # when enabled, as they permit processes to easily modify aspects of the
  500 # run-time environment to reproduce unlikely or unusual (possibly normally
  501 # impossible) scenarios.
  502 #
  503 options         REGRESSION
  504 
  505 #
  506 # This option lets some drivers co-exist that can't co-exist in a running
  507 # system.  This is used to be able to compile all kernel code in one go for
  508 # quality assurance purposes (like this file, which the option takes it name
  509 # from.)
  510 #
  511 options         COMPILING_LINT
  512 
  513 #
  514 # STACK enables the stack(9) facility, allowing the capture of kernel stack
  515 # for the purpose of procinfo(1), etc.  stack(9) will also be compiled in
  516 # automatically if DDB(4) is compiled into the kernel.
  517 #
  518 options         STACK
  519 
  520 
  521 #####################################################################
  522 # PERFORMANCE MONITORING OPTIONS
  523 
  524 #
  525 # The hwpmc driver that allows the use of in-CPU performance monitoring
  526 # counters for performance monitoring.  The base kernel needs to be configured
  527 # with the 'options' line, while the hwpmc device can be either compiled
  528 # in or loaded as a loadable kernel module.
  529 #
  530 # Additional configuration options may be required on specific architectures,
  531 # please see hwpmc(4).
  532 
  533 device          hwpmc                   # Driver (also a loadable module)
  534 options         HWPMC_HOOKS             # Other necessary kernel hooks
  535 
  536 
  537 #####################################################################
  538 # NETWORKING OPTIONS
  539 
  540 #
  541 # Protocol families
  542 #
  543 options         INET                    #Internet communications protocols
  544 options         INET6                   #IPv6 communications protocols
  545 
  546 options         ROUTETABLES=2           # max 16. 1 is back compatible.
  547 
  548 # In order to enable IPSEC you MUST also add device crypto to 
  549 # your kernel configuration
  550 options         IPSEC                   #IP security (requires device crypto)
  551 #options        IPSEC_DEBUG             #debug for IP security
  552 #
  553 # #DEPRECATED#
  554 # Set IPSEC_FILTERTUNNEL to change the default of the sysctl to force packets
  555 # coming through a tunnel to be processed by any configured packet filtering
  556 # twice. The default is that packets coming out of a tunnel are _not_ processed;
  557 # they are assumed trusted.
  558 #
  559 # IPSEC history is preserved for such packets, and can be filtered
  560 # using ipfw(8)'s 'ipsec' keyword, when this option is enabled.
  561 #
  562 #options        IPSEC_FILTERTUNNEL      #filter ipsec packets from a tunnel
  563 #
  564 # Set IPSEC_NAT_T to enable NAT-Traversal support.  This enables
  565 # optional UDP encapsulation of ESP packets.
  566 #
  567 options         IPSEC_NAT_T             #NAT-T support, UDP encap of ESP
  568 
  569 options         IPX                     #IPX/SPX communications protocols
  570 
  571 options         NCP                     #NetWare Core protocol
  572 
  573 options         NETATALK                #Appletalk communications protocols
  574 options         NETATALKDEBUG           #Appletalk debugging
  575 
  576 #
  577 # SMB/CIFS requester
  578 # NETSMB enables support for SMB protocol, it requires LIBMCHAIN and LIBICONV
  579 # options.
  580 options         NETSMB                  #SMB/CIFS requester
  581 
  582 # mchain library. It can be either loaded as KLD or compiled into kernel
  583 options         LIBMCHAIN
  584 
  585 # libalias library, performing NAT
  586 options         LIBALIAS
  587 
  588 # flowtable cache
  589 options         FLOWTABLE
  590 
  591 #
  592 # SCTP is a NEW transport protocol defined by
  593 # RFC2960 updated by RFC3309 and RFC3758.. and
  594 # soon to have a new base RFC and many many more
  595 # extensions. This release supports all the extensions
  596 # including many drafts (most about to become RFC's).
  597 # It is the reference implementation of SCTP
  598 # and is quite well tested.
  599 #
  600 # Note YOU MUST have both INET and INET6 defined.
  601 # You don't have to enable V6, but SCTP is 
  602 # dual stacked and so far we have not torn apart
  603 # the V6 and V4.. since an association can span
  604 # both a V6 and V4 address at the SAME time :-)
  605 #
  606 options         SCTP
  607 # There are bunches of options:
  608 # this one turns on all sorts of
  609 # nastly printing that you can
  610 # do. It's all controlled by a
  611 # bit mask (settable by socket opt and
  612 # by sysctl). Including will not cause
  613 # logging until you set the bits.. but it
  614 # can be quite verbose.. so without this
  615 # option we don't do any of the tests for
  616 # bits and prints.. which makes the code run
  617 # faster.. if you are not debugging don't use.
  618 options         SCTP_DEBUG
  619 #
  620 # This option turns off the CRC32c checksum. Basically,
  621 # you will not be able to talk to anyone else who
  622 # has not done this. Its more for experimentation to
  623 # see how much CPU the CRC32c really takes. Most new
  624 # cards for TCP support checksum offload.. so this 
  625 # option gives you a "view" into what SCTP would be
  626 # like with such an offload (which only exists in
  627 # high in iSCSI boards so far). With the new
  628 # splitting 8's algorithm its not as bad as it used
  629 # to be.. but it does speed things up try only
  630 # for in a captured lab environment :-)
  631 options         SCTP_WITH_NO_CSUM
  632 #
  633 
  634 #
  635 # All that options after that turn on specific types of
  636 # logging. You can monitor CWND growth, flight size
  637 # and all sorts of things. Go look at the code and
  638 # see. I have used this to produce interesting 
  639 # charts and graphs as well :->
  640 # 
  641 # I have not yet committed the tools to get and print
  642 # the logs, I will do that eventually .. before then
  643 # if you want them send me an email rrs@freebsd.org
  644 # You basically must have ktr(4) enabled for these
  645 # and you then set the sysctl to turn on/off various
  646 # logging bits. Use ktrdump(8) to pull the log and run
  647 # it through a display program.. and graphs and other
  648 # things too.
  649 #
  650 options         SCTP_LOCK_LOGGING
  651 options         SCTP_MBUF_LOGGING
  652 options         SCTP_MBCNT_LOGGING
  653 options         SCTP_PACKET_LOGGING
  654 options         SCTP_LTRACE_CHUNKS
  655 options         SCTP_LTRACE_ERRORS
  656 
  657 
  658 # altq(9). Enable the base part of the hooks with the ALTQ option.
  659 # Individual disciplines must be built into the base system and can not be
  660 # loaded as modules at this point. ALTQ requires a stable TSC so if yours is
  661 # broken or changes with CPU throttling then you must also have the ALTQ_NOPCC
  662 # option.
  663 options         ALTQ
  664 options         ALTQ_CBQ        # Class Based Queueing
  665 options         ALTQ_RED        # Random Early Detection
  666 options         ALTQ_RIO        # RED In/Out
  667 options         ALTQ_HFSC       # Hierarchical Packet Scheduler
  668 options         ALTQ_CDNR       # Traffic conditioner
  669 options         ALTQ_PRIQ       # Priority Queueing
  670 options         ALTQ_NOPCC      # Required if the TSC is unusable
  671 options         ALTQ_DEBUG
  672 
  673 # netgraph(4). Enable the base netgraph code with the NETGRAPH option.
  674 # Individual node types can be enabled with the corresponding option
  675 # listed below; however, this is not strictly necessary as netgraph
  676 # will automatically load the corresponding KLD module if the node type
  677 # is not already compiled into the kernel. Each type below has a
  678 # corresponding man page, e.g., ng_async(8).
  679 options         NETGRAPH                # netgraph(4) system
  680 options         NETGRAPH_DEBUG          # enable extra debugging, this
  681                                         # affects netgraph(4) and nodes
  682 # Node types
  683 options         NETGRAPH_ASYNC
  684 options         NETGRAPH_ATMLLC
  685 options         NETGRAPH_ATM_ATMPIF
  686 options         NETGRAPH_BLUETOOTH              # ng_bluetooth(4)
  687 options         NETGRAPH_BLUETOOTH_BT3C         # ng_bt3c(4)
  688 options         NETGRAPH_BLUETOOTH_HCI          # ng_hci(4)
  689 options         NETGRAPH_BLUETOOTH_L2CAP        # ng_l2cap(4)
  690 options         NETGRAPH_BLUETOOTH_SOCKET       # ng_btsocket(4)
  691 options         NETGRAPH_BLUETOOTH_UBT          # ng_ubt(4)
  692 options         NETGRAPH_BLUETOOTH_UBTBCMFW     # ubtbcmfw(4)
  693 options         NETGRAPH_BPF
  694 options         NETGRAPH_BRIDGE
  695 options         NETGRAPH_CAR
  696 options         NETGRAPH_CISCO
  697 options         NETGRAPH_DEFLATE
  698 options         NETGRAPH_DEVICE
  699 options         NETGRAPH_ECHO
  700 options         NETGRAPH_EIFACE
  701 options         NETGRAPH_ETHER
  702 options         NETGRAPH_FEC
  703 options         NETGRAPH_FRAME_RELAY
  704 options         NETGRAPH_GIF
  705 options         NETGRAPH_GIF_DEMUX
  706 options         NETGRAPH_HOLE
  707 options         NETGRAPH_IFACE
  708 options         NETGRAPH_IP_INPUT
  709 options         NETGRAPH_IPFW
  710 options         NETGRAPH_KSOCKET
  711 options         NETGRAPH_L2TP
  712 options         NETGRAPH_LMI
  713 # MPPC compression requires proprietary files (not included)
  714 #options        NETGRAPH_MPPC_COMPRESSION
  715 options         NETGRAPH_MPPC_ENCRYPTION
  716 options         NETGRAPH_NETFLOW
  717 options         NETGRAPH_NAT
  718 options         NETGRAPH_ONE2MANY
  719 options         NETGRAPH_PATCH
  720 options         NETGRAPH_PIPE
  721 options         NETGRAPH_PPP
  722 options         NETGRAPH_PPPOE
  723 options         NETGRAPH_PPTPGRE
  724 options         NETGRAPH_PRED1
  725 options         NETGRAPH_RFC1490
  726 options         NETGRAPH_SOCKET
  727 options         NETGRAPH_SPLIT
  728 options         NETGRAPH_SPPP
  729 options         NETGRAPH_TAG
  730 options         NETGRAPH_TCPMSS
  731 options         NETGRAPH_TEE
  732 options         NETGRAPH_UI
  733 options         NETGRAPH_VJC
  734 options         NETGRAPH_VLAN
  735 
  736 # NgATM - Netgraph ATM
  737 options         NGATM_ATM
  738 options         NGATM_ATMBASE
  739 options         NGATM_SSCOP
  740 options         NGATM_SSCFU
  741 options         NGATM_UNI
  742 options         NGATM_CCATM
  743 
  744 device          mn      # Munich32x/Falc54 Nx64kbit/sec cards.
  745 
  746 #
  747 # Network interfaces:
  748 #  The `loop' device is MANDATORY when networking is enabled.
  749 device          loop
  750 
  751 #  The `ether' device provides generic code to handle
  752 #  Ethernets; it is MANDATORY when an Ethernet device driver is
  753 #  configured or token-ring is enabled.
  754 device          ether
  755 
  756 #  The `vlan' device implements the VLAN tagging of Ethernet frames
  757 #  according to IEEE 802.1Q.
  758 device          vlan
  759 
  760 #  The `wlan' device provides generic code to support 802.11
  761 #  drivers, including host AP mode; it is MANDATORY for the wi,
  762 #  and ath drivers and will eventually be required by all 802.11 drivers.
  763 device          wlan
  764 options         IEEE80211_DEBUG         #enable debugging msgs
  765 options         IEEE80211_AMPDU_AGE     #age frames in AMPDU reorder q's
  766 options         IEEE80211_SUPPORT_MESH  #enable 802.11s D3.0 support
  767 options         IEEE80211_SUPPORT_TDMA  #enable TDMA support
  768 
  769 #  The `wlan_wep', `wlan_tkip', and `wlan_ccmp' devices provide
  770 #  support for WEP, TKIP, and AES-CCMP crypto protocols optionally
  771 #  used with 802.11 devices that depend on the `wlan' module.
  772 device          wlan_wep
  773 device          wlan_ccmp
  774 device          wlan_tkip
  775 
  776 #  The `wlan_xauth' device provides support for external (i.e. user-mode)
  777 #  authenticators for use with 802.11 drivers that use the `wlan'
  778 #  module and support 802.1x and/or WPA security protocols.
  779 device          wlan_xauth
  780 
  781 #  The `wlan_acl' device provides a MAC-based access control mechanism
  782 #  for use with 802.11 drivers operating in ap mode and using the
  783 #  `wlan' module.
  784 #  The 'wlan_amrr' device provides AMRR transmit rate control algorithm
  785 device          wlan_acl
  786 device          wlan_amrr
  787 
  788 # Generic TokenRing
  789 device          token
  790 
  791 #  The `fddi' device provides generic code to support FDDI.
  792 device          fddi
  793 
  794 #  The `arcnet' device provides generic code to support Arcnet.
  795 device          arcnet
  796 
  797 #  The `sppp' device serves a similar role for certain types
  798 #  of synchronous PPP links (like `cx', `ar').
  799 device          sppp
  800 
  801 #  The `bpf' device enables the Berkeley Packet Filter.  Be
  802 #  aware of the legal and administrative consequences of enabling this
  803 #  option.  DHCP requires bpf.
  804 device          bpf
  805 
  806 #  The `netmap' device implements memory-mapped access to network
  807 #  devices from userspace, enabling wire-speed packet capture and
  808 #  generation even at 10Gbit/s. Requires support in the device
  809 #  driver. Supported drivers are ixgbe, e1000, re.
  810 device          netmap
  811 
  812 #  The `disc' device implements a minimal network interface,
  813 #  which throws away all packets sent and never receives any.  It is
  814 #  included for testing and benchmarking purposes.
  815 device          disc
  816 
  817 # The `epair' device implements a virtual back-to-back connected Ethernet
  818 # like interface pair.
  819 device          epair
  820 
  821 #  The `edsc' device implements a minimal Ethernet interface,
  822 #  which discards all packets sent and receives none.
  823 device          edsc
  824 
  825 #  The `tap' device is a pty-like virtual Ethernet interface
  826 device          tap
  827 
  828 #  The `tun' device implements (user-)ppp and nos-tun(8)
  829 device          tun
  830 
  831 #  The `gif' device implements IPv6 over IP4 tunneling,
  832 #  IPv4 over IPv6 tunneling, IPv4 over IPv4 tunneling and
  833 #  IPv6 over IPv6 tunneling.
  834 #  The `gre' device implements two types of IP4 over IP4 tunneling:
  835 #  GRE and MOBILE, as specified in the RFC1701 and RFC2004.
  836 #  The XBONEHACK option allows the same pair of addresses to be configured on
  837 #  multiple gif interfaces.
  838 device          gif
  839 device          gre
  840 options         XBONEHACK
  841 
  842 #  The `faith' device captures packets sent to it and diverts them
  843 #  to the IPv4/IPv6 translation daemon.
  844 #  The `stf' device implements 6to4 encapsulation.
  845 device          faith
  846 device          stf
  847 
  848 #  The `ef' device provides support for multiple ethernet frame types
  849 #  specified via ETHER_* options. See ef(4) for details.
  850 device          ef
  851 options         ETHER_II                # enable Ethernet_II frame
  852 options         ETHER_8023              # enable Ethernet_802.3 (Novell) frame
  853 options         ETHER_8022              # enable Ethernet_802.2 frame
  854 options         ETHER_SNAP              # enable Ethernet_802.2/SNAP frame
  855 
  856 # The pf packet filter consists of three devices:
  857 #  The `pf' device provides /dev/pf and the firewall code itself.
  858 #  The `pflog' device provides the pflog0 interface which logs packets.
  859 #  The `pfsync' device provides the pfsync0 interface used for
  860 #   synchronization of firewall state tables (over the net).
  861 device          pf
  862 device          pflog
  863 device          pfsync
  864 
  865 # Bridge interface.
  866 device          if_bridge
  867 
  868 # Common Address Redundancy Protocol. See carp(4) for more details.
  869 device          carp
  870 
  871 # IPsec interface.
  872 device          enc
  873 
  874 # Link aggregation interface.
  875 device          lagg
  876 
  877 #
  878 # Internet family options:
  879 #
  880 # MROUTING enables the kernel multicast packet forwarder, which works
  881 # with mrouted and XORP.
  882 #
  883 # IPFIREWALL enables support for IP firewall construction, in
  884 # conjunction with the `ipfw' program.  IPFIREWALL_VERBOSE sends
  885 # logged packets to the system logger.  IPFIREWALL_VERBOSE_LIMIT
  886 # limits the number of times a matching entry can be logged.
  887 #
  888 # WARNING:  IPFIREWALL defaults to a policy of "deny ip from any to any"
  889 # and if you do not add other rules during startup to allow access,
  890 # YOU WILL LOCK YOURSELF OUT.  It is suggested that you set firewall_type=open
  891 # in /etc/rc.conf when first enabling this feature, then refining the
  892 # firewall rules in /etc/rc.firewall after you've tested that the new kernel
  893 # feature works properly.
  894 #
  895 # IPFIREWALL_DEFAULT_TO_ACCEPT causes the default rule (at boot) to
  896 # allow everything.  Use with care, if a cracker can crash your
  897 # firewall machine, they can get to your protected machines.  However,
  898 # if you are using it as an as-needed filter for specific problems as
  899 # they arise, then this may be for you.  Changing the default to 'allow'
  900 # means that you won't get stuck if the kernel and /sbin/ipfw binary get
  901 # out of sync.
  902 #
  903 # IPDIVERT enables the divert IP sockets, used by ``ipfw divert''.  It
  904 # depends on IPFIREWALL if compiled into the kernel.
  905 #
  906 # IPFIREWALL_FORWARD enables changing of the packet destination either
  907 # to do some sort of policy routing or transparent proxying.  Used by
  908 # ``ipfw forward''. All  redirections apply to locally generated
  909 # packets too.  Because of this great care is required when
  910 # crafting the ruleset.
  911 #
  912 # IPFIREWALL_NAT adds support for in kernel nat in ipfw, and it requires
  913 # LIBALIAS.
  914 #
  915 # IPSTEALTH enables code to support stealth forwarding (i.e., forwarding
  916 # packets without touching the TTL).  This can be useful to hide firewalls
  917 # from traceroute and similar tools.
  918 #
  919 # TCPDEBUG enables code which keeps traces of the TCP state machine
  920 # for sockets with the SO_DEBUG option set, which can then be examined
  921 # using the trpt(8) utility.
  922 #
  923 options         MROUTING                # Multicast routing
  924 options         IPFIREWALL              #firewall
  925 options         IPFIREWALL_VERBOSE      #enable logging to syslogd(8)
  926 options         IPFIREWALL_VERBOSE_LIMIT=100    #limit verbosity
  927 options         IPFIREWALL_DEFAULT_TO_ACCEPT    #allow everything by default
  928 options         IPFIREWALL_FORWARD      #packet destination changes
  929 options         IPFIREWALL_NAT          #ipfw kernel nat support
  930 options         IPDIVERT                #divert sockets
  931 options         IPFILTER                #ipfilter support
  932 options         IPFILTER_LOG            #ipfilter logging
  933 options         IPFILTER_LOOKUP         #ipfilter pools
  934 options         IPFILTER_DEFAULT_BLOCK  #block all packets by default
  935 options         IPSTEALTH               #support for stealth forwarding
  936 options         TCPDEBUG
  937 
  938 # The MBUF_STRESS_TEST option enables options which create
  939 # various random failures / extreme cases related to mbuf
  940 # functions.  See mbuf(9) for a list of available test cases.
  941 # MBUF_PROFILING enables code to profile the mbuf chains
  942 # exiting the system (via participating interfaces) and
  943 # return a logarithmic histogram of monitored parameters
  944 # (e.g. packet size, wasted space, number of mbufs in chain).
  945 options         MBUF_STRESS_TEST
  946 options         MBUF_PROFILING
  947 
  948 # Statically link in accept filters
  949 options         ACCEPT_FILTER_DATA
  950 options         ACCEPT_FILTER_DNS
  951 options         ACCEPT_FILTER_HTTP
  952 
  953 # TCP_SIGNATURE adds support for RFC 2385 (TCP-MD5) digests. These are
  954 # carried in TCP option 19. This option is commonly used to protect
  955 # TCP sessions (e.g. BGP) where IPSEC is not available nor desirable.
  956 # This is enabled on a per-socket basis using the TCP_MD5SIG socket option.
  957 # This requires the use of 'device crypto', 'options IPSEC'
  958 # or 'device cryptodev'.
  959 options         TCP_SIGNATURE           #include support for RFC 2385
  960 
  961 # DUMMYNET enables the "dummynet" bandwidth limiter.  You need IPFIREWALL
  962 # as well.  See dummynet(4) and ipfw(8) for more info.  When you run
  963 # DUMMYNET it is advisable to also have at least "options HZ=1000" to achieve
  964 # a smooth scheduling of the traffic.
  965 options         DUMMYNET
  966 
  967 # Zero copy sockets support.  This enables "zero copy" for sending and
  968 # receiving data via a socket.  The send side works for any type of NIC,
  969 # the receive side only works for NICs that support MTUs greater than the
  970 # page size of your architecture and that support header splitting.  See
  971 # zero_copy(9) for more details.
  972 options         ZERO_COPY_SOCKETS
  973 
  974 #####################################################################
  975 # FILESYSTEM OPTIONS
  976 
  977 #
  978 # Only the root filesystem needs to be statically compiled or preloaded
  979 # as module; everything else will be automatically loaded at mount
  980 # time.  Some people still prefer to statically compile other
  981 # filesystems as well.
  982 #
  983 # NB: The PORTAL filesystem is known to be buggy, and WILL panic your
  984 # system if you attempt to do anything with it.  It is included here
  985 # as an incentive for some enterprising soul to sit down and fix it.
  986 # The UNION filesystem was known to be buggy in the past.  It is now
  987 # being actively maintained, although there are still some issues being
  988 # resolved.
  989 #
  990 
  991 # One of these is mandatory:
  992 options         FFS                     #Fast filesystem
  993 options         NFSCLIENT               #Network File System client
  994 
  995 # The rest are optional:
  996 options         CD9660                  #ISO 9660 filesystem
  997 options         FDESCFS                 #File descriptor filesystem
  998 options         HPFS                    #OS/2 File system
  999 options         MSDOSFS                 #MS DOS File System (FAT, FAT32)
 1000 options         NFSSERVER               #Network File System server
 1001 options         NFSLOCKD                #Network Lock Manager
 1002 options         NFSCL                   #experimental NFS client with NFSv4
 1003 options         NFSD                    #experimental NFS server with NFSv4
 1004 options         KGSSAPI                 #Kernel GSSAPI implementation
 1005 
 1006 # NT File System. Read-mostly, see mount_ntfs(8) for details.
 1007 # For a full read-write NTFS support consider sysutils/fusefs-ntfs
 1008 # port/package.
 1009 options         NTFS
 1010 
 1011 options         NULLFS                  #NULL filesystem
 1012 # Broken (depends on NCP):
 1013 #options        NWFS                    #NetWare filesystem
 1014 options         PORTALFS                #Portal filesystem
 1015 options         PROCFS                  #Process filesystem (requires PSEUDOFS)
 1016 options         PSEUDOFS                #Pseudo-filesystem framework
 1017 options         PSEUDOFS_TRACE          #Debugging support for PSEUDOFS
 1018 options         SMBFS                   #SMB/CIFS filesystem
 1019 options         TMPFS                   #Efficient memory filesystem
 1020 options         UDF                     #Universal Disk Format
 1021 options         UNIONFS                 #Union filesystem
 1022 # The xFS_ROOT options REQUIRE the associated ``options xFS''
 1023 options         NFS_ROOT                #NFS usable as root device
 1024 
 1025 # Soft updates is a technique for improving filesystem speed and
 1026 # making abrupt shutdown less risky.
 1027 #
 1028 options         SOFTUPDATES
 1029 
 1030 # Extended attributes allow additional data to be associated with files,
 1031 # and is used for ACLs, Capabilities, and MAC labels.
 1032 # See src/sys/ufs/ufs/README.extattr for more information.
 1033 options         UFS_EXTATTR
 1034 options         UFS_EXTATTR_AUTOSTART
 1035 
 1036 # Access Control List support for UFS filesystems.  The current ACL
 1037 # implementation requires extended attribute support, UFS_EXTATTR,
 1038 # for the underlying filesystem.
 1039 # See src/sys/ufs/ufs/README.acls for more information.
 1040 options         UFS_ACL
 1041 
 1042 # Directory hashing improves the speed of operations on very large
 1043 # directories at the expense of some memory.
 1044 options         UFS_DIRHASH
 1045 
 1046 # Gjournal-based UFS journaling support.
 1047 options         UFS_GJOURNAL
 1048 
 1049 # Make space in the kernel for a root filesystem on a md device.
 1050 # Define to the number of kilobytes to reserve for the filesystem.
 1051 options         MD_ROOT_SIZE=10
 1052 
 1053 # Make the md device a potential root device, either with preloaded
 1054 # images of type mfs_root or md_root.
 1055 options         MD_ROOT
 1056 
 1057 # Disk quotas are supported when this option is enabled.
 1058 options         QUOTA                   #enable disk quotas
 1059 
 1060 # If you are running a machine just as a fileserver for PC and MAC
 1061 # users, using SAMBA or Netatalk, you may consider setting this option
 1062 # and keeping all those users' directories on a filesystem that is
 1063 # mounted with the suiddir option. This gives new files the same
 1064 # ownership as the directory (similar to group). It's a security hole
 1065 # if you let these users run programs, so confine it to file-servers
 1066 # (but it'll save you lots of headaches in those cases). Root owned
 1067 # directories are exempt and X bits are cleared. The suid bit must be
 1068 # set on the directory as well; see chmod(1). PC owners can't see/set
 1069 # ownerships so they keep getting their toes trodden on. This saves
 1070 # you all the support calls as the filesystem it's used on will act as
 1071 # they expect: "It's my dir so it must be my file".
 1072 #
 1073 options         SUIDDIR
 1074 
 1075 # NFS options:
 1076 options         NFS_MINATTRTIMO=3       # VREG attrib cache timeout in sec
 1077 options         NFS_MAXATTRTIMO=60
 1078 options         NFS_MINDIRATTRTIMO=30   # VDIR attrib cache timeout in sec
 1079 options         NFS_MAXDIRATTRTIMO=60
 1080 options         NFS_GATHERDELAY=10      # Default write gather delay (msec)
 1081 options         NFS_WDELAYHASHSIZ=16    # and with this
 1082 options         NFS_DEBUG               # Enable NFS Debugging
 1083 
 1084 # Coda stuff:
 1085 options         CODA                    #CODA filesystem.
 1086 device          vcoda                   #coda minicache <-> venus comm.
 1087 # Use the old Coda 5.x venus<->kernel interface instead of the new
 1088 # realms-aware 6.x protocol.
 1089 #options        CODA_COMPAT_5
 1090 
 1091 #
 1092 # Add support for the EXT2FS filesystem of Linux fame.  Be a bit
 1093 # careful with this - the ext2fs code has a tendency to lag behind
 1094 # changes and not be exercised very much, so mounting read/write could
 1095 # be dangerous (and even mounting read only could result in panics.)
 1096 #
 1097 options         EXT2FS
 1098 
 1099 #
 1100 # Add support for the ReiserFS filesystem (used in Linux). Currently,
 1101 # this is limited to read-only access.
 1102 #
 1103 options         REISERFS
 1104 
 1105 #
 1106 # Add support for the SGI XFS filesystem. Currently,
 1107 # this is limited to read-only access.
 1108 #
 1109 options         XFS
 1110 
 1111 # Use real implementations of the aio_* system calls.  There are numerous
 1112 # stability and security issues in the current aio code that make it
 1113 # unsuitable for inclusion on machines with untrusted local users.
 1114 options         VFS_AIO
 1115 
 1116 # Cryptographically secure random number generator; /dev/random
 1117 device          random
 1118 
 1119 # The system memory devices; /dev/mem, /dev/kmem
 1120 device          mem
 1121 
 1122 # The kernel symbol table device; /dev/ksyms
 1123 device          ksyms
 1124 
 1125 # Optional character code conversion support with LIBICONV.
 1126 # Each option requires their base file system and LIBICONV.
 1127 options         CD9660_ICONV
 1128 options         MSDOSFS_ICONV
 1129 options         NTFS_ICONV
 1130 options         UDF_ICONV
 1131 
 1132 
 1133 #####################################################################
 1134 # POSIX P1003.1B
 1135 
 1136 # Real time extensions added in the 1993 POSIX
 1137 # _KPOSIX_PRIORITY_SCHEDULING: Build in _POSIX_PRIORITY_SCHEDULING
 1138 
 1139 options         _KPOSIX_PRIORITY_SCHEDULING
 1140 # p1003_1b_semaphores are very experimental,
 1141 # user should be ready to assist in debugging if problems arise.
 1142 options         P1003_1B_SEMAPHORES
 1143 
 1144 # POSIX message queue
 1145 options         P1003_1B_MQUEUE
 1146 
 1147 #####################################################################
 1148 # SECURITY POLICY PARAMETERS
 1149 
 1150 # Support for BSM audit
 1151 options         AUDIT
 1152 
 1153 # Support for Mandatory Access Control (MAC):
 1154 options         MAC
 1155 options         MAC_BIBA
 1156 options         MAC_BSDEXTENDED
 1157 options         MAC_IFOFF
 1158 options         MAC_LOMAC
 1159 options         MAC_MLS
 1160 options         MAC_NONE
 1161 options         MAC_PARTITION
 1162 options         MAC_PORTACL
 1163 options         MAC_SEEOTHERUIDS
 1164 options         MAC_STUB
 1165 options         MAC_TEST
 1166 
 1167 # Support for Capsicum
 1168 options         CAPABILITIES    # fine-grained rights on file descriptors
 1169 options         CAPABILITY_MODE # sandboxes with no global namespace access
 1170 
 1171 # Support for process descriptors
 1172 options         PROCDESC
 1173 
 1174 
 1175 #####################################################################
 1176 # CLOCK OPTIONS
 1177 
 1178 # The granularity of operation is controlled by the kernel option HZ whose
 1179 # default value (1000 on most architectures) means a granularity of 1ms
 1180 # (1s/HZ).  Historically, the default was 100, but finer granularity is
 1181 # required for DUMMYNET and other systems on modern hardware.  There are
 1182 # reasonable arguments that HZ should, in fact, be 100 still; consider,
 1183 # that reducing the granularity too much might cause excessive overhead in
 1184 # clock interrupt processing, potentially causing ticks to be missed and thus
 1185 # actually reducing the accuracy of operation.
 1186 
 1187 options         HZ=100
 1188 
 1189 # Enable support for the kernel PLL to use an external PPS signal,
 1190 # under supervision of [x]ntpd(8)
 1191 # More info in ntpd documentation: http://www.eecis.udel.edu/~ntp
 1192 
 1193 options         PPS_SYNC
 1194 
 1195 
 1196 #####################################################################
 1197 # SCSI DEVICES
 1198 
 1199 # SCSI DEVICE CONFIGURATION
 1200 
 1201 # The SCSI subsystem consists of the `base' SCSI code, a number of
 1202 # high-level SCSI device `type' drivers, and the low-level host-adapter
 1203 # device drivers.  The host adapters are listed in the ISA and PCI
 1204 # device configuration sections below.
 1205 #
 1206 # It is possible to wire down your SCSI devices so that a given bus,
 1207 # target, and LUN always come on line as the same device unit.  In
 1208 # earlier versions the unit numbers were assigned in the order that
 1209 # the devices were probed on the SCSI bus.  This means that if you
 1210 # removed a disk drive, you may have had to rewrite your /etc/fstab
 1211 # file, and also that you had to be careful when adding a new disk
 1212 # as it may have been probed earlier and moved your device configuration
 1213 # around.  (See also option GEOM_VOL for a different solution to this
 1214 # problem.)
 1215 
 1216 # This old behavior is maintained as the default behavior.  The unit
 1217 # assignment begins with the first non-wired down unit for a device
 1218 # type.  For example, if you wire a disk as "da3" then the first
 1219 # non-wired disk will be assigned da4.
 1220 
 1221 # The syntax for wiring down devices is:
 1222 
 1223 hint.scbus.0.at="ahc0"
 1224 hint.scbus.1.at="ahc1"
 1225 hint.scbus.1.bus="0"
 1226 hint.scbus.3.at="ahc2"
 1227 hint.scbus.3.bus="0"
 1228 hint.scbus.2.at="ahc2"
 1229 hint.scbus.2.bus="1"
 1230 hint.da.0.at="scbus0"
 1231 hint.da.0.target="0"
 1232 hint.da.0.unit="0"
 1233 hint.da.1.at="scbus3"
 1234 hint.da.1.target="1"
 1235 hint.da.2.at="scbus2"
 1236 hint.da.2.target="3"
 1237 hint.sa.1.at="scbus1"
 1238 hint.sa.1.target="6"
 1239 
 1240 # "units" (SCSI logical unit number) that are not specified are
 1241 # treated as if specified as LUN 0.
 1242 
 1243 # All SCSI devices allocate as many units as are required.
 1244 
 1245 # The ch driver drives SCSI Media Changer ("jukebox") devices.
 1246 #
 1247 # The da driver drives SCSI Direct Access ("disk") and Optical Media
 1248 # ("WORM") devices.
 1249 #
 1250 # The sa driver drives SCSI Sequential Access ("tape") devices.
 1251 #
 1252 # The cd driver drives SCSI Read Only Direct Access ("cd") devices.
 1253 #
 1254 # The ses driver drives SCSI Environment Services ("ses") and
 1255 # SAF-TE ("SCSI Accessible Fault-Tolerant Enclosure") devices.
 1256 #
 1257 # The pt driver drives SCSI Processor devices.
 1258 #
 1259 # The sg driver provides a passthrough API that is compatible with the
 1260 # Linux SG driver.  It will work in conjunction with the COMPAT_LINUX
 1261 # option to run linux SG apps.  It can also stand on its own and provide
 1262 # source level API compatiblity for porting apps to FreeBSD.
 1263 #
 1264 # Target Mode support is provided here but also requires that a SIM
 1265 # (SCSI Host Adapter Driver) provide support as well.
 1266 #
 1267 # The targ driver provides target mode support as a Processor type device.
 1268 # It exists to give the minimal context necessary to respond to Inquiry
 1269 # commands. There is a sample user application that shows how the rest
 1270 # of the command support might be done in /usr/share/examples/scsi_target.
 1271 #
 1272 # The targbh driver provides target mode support and exists to respond
 1273 # to incoming commands that do not otherwise have a logical unit assigned
 1274 # to them.
 1275 #
 1276 # The "unknown" device (uk? in pre-2.0.5) is now part of the base SCSI
 1277 # configuration as the "pass" driver.
 1278 
 1279 device          scbus           #base SCSI code
 1280 device          ch              #SCSI media changers
 1281 device          da              #SCSI direct access devices (aka disks)
 1282 device          sa              #SCSI tapes
 1283 device          cd              #SCSI CD-ROMs
 1284 device          ses             #SCSI Environmental Services (and SAF-TE)
 1285 device          pt              #SCSI processor
 1286 device          targ            #SCSI Target Mode Code
 1287 device          targbh          #SCSI Target Mode Blackhole Device
 1288 device          pass            #CAM passthrough driver
 1289 device          sg              #Linux SCSI passthrough
 1290 device          ctl             #CAM Target Layer
 1291 
 1292 # CAM OPTIONS:
 1293 # debugging options:
 1294 # CAMDEBUG              Compile in all possible debugging.
 1295 # CAM_DEBUG_COMPILE     Debug levels to compile in.
 1296 # CAM_DEBUG_FLAGS       Debug levels to enable on boot.
 1297 # CAM_DEBUG_BUS         Limit debugging to the given bus.
 1298 # CAM_DEBUG_TARGET      Limit debugging to the given target.
 1299 # CAM_DEBUG_LUN         Limit debugging to the given lun.
 1300 # CAM_DEBUG_DELAY       Delay in us after printing each debug line.
 1301 #
 1302 # CAM_MAX_HIGHPOWER: Maximum number of concurrent high power (start unit) cmds
 1303 # SCSI_NO_SENSE_STRINGS: When defined disables sense descriptions
 1304 # SCSI_NO_OP_STRINGS: When defined disables opcode descriptions
 1305 # SCSI_DELAY: The number of MILLISECONDS to freeze the SIM (scsi adapter)
 1306 #             queue after a bus reset, and the number of milliseconds to
 1307 #             freeze the device queue after a bus device reset.  This
 1308 #             can be changed at boot and runtime with the
 1309 #             kern.cam.scsi_delay tunable/sysctl.
 1310 options         CAMDEBUG
 1311 options         CAM_DEBUG_COMPILE=-1
 1312 options         CAM_DEBUG_FLAGS=(CAM_DEBUG_INFO|CAM_DEBUG_PROBE|CAM_DEBUG_PERIPH)
 1313 options         CAM_DEBUG_BUS=-1
 1314 options         CAM_DEBUG_TARGET=-1
 1315 options         CAM_DEBUG_LUN=-1
 1316 options         CAM_DEBUG_DELAY=1
 1317 options         CAM_MAX_HIGHPOWER=4
 1318 options         SCSI_NO_SENSE_STRINGS
 1319 options         SCSI_NO_OP_STRINGS
 1320 options         SCSI_DELAY=5000 # Be pessimistic about Joe SCSI device
 1321 
 1322 # Options for the CAM CDROM driver:
 1323 # CHANGER_MIN_BUSY_SECONDS: Guaranteed minimum time quantum for a changer LUN
 1324 # CHANGER_MAX_BUSY_SECONDS: Maximum time quantum per changer LUN, only
 1325 #                           enforced if there is I/O waiting for another LUN
 1326 # The compiled in defaults for these variables are 2 and 10 seconds,
 1327 # respectively.
 1328 #
 1329 # These can also be changed on the fly with the following sysctl variables:
 1330 # kern.cam.cd.changer.min_busy_seconds
 1331 # kern.cam.cd.changer.max_busy_seconds
 1332 #
 1333 options         CHANGER_MIN_BUSY_SECONDS=2
 1334 options         CHANGER_MAX_BUSY_SECONDS=10
 1335 
 1336 # Options for the CAM sequential access driver:
 1337 # SA_IO_TIMEOUT: Timeout for read/write/wfm  operations, in minutes
 1338 # SA_SPACE_TIMEOUT: Timeout for space operations, in minutes
 1339 # SA_REWIND_TIMEOUT: Timeout for rewind operations, in minutes
 1340 # SA_ERASE_TIMEOUT: Timeout for erase operations, in minutes
 1341 # SA_1FM_AT_EOD: Default to model which only has a default one filemark at EOT.
 1342 options         SA_IO_TIMEOUT=4
 1343 options         SA_SPACE_TIMEOUT=60
 1344 options         SA_REWIND_TIMEOUT=(2*60)
 1345 options         SA_ERASE_TIMEOUT=(4*60)
 1346 options         SA_1FM_AT_EOD
 1347 
 1348 # Optional timeout for the CAM processor target (pt) device
 1349 # This is specified in seconds.  The default is 60 seconds.
 1350 options         SCSI_PT_DEFAULT_TIMEOUT=60
 1351 
 1352 # Optional enable of doing SES passthrough on other devices (e.g., disks)
 1353 #
 1354 # Normally disabled because a lot of newer SCSI disks report themselves
 1355 # as having SES capabilities, but this can then clot up attempts to build
 1356 # a topology with the SES device that's on the box these drives are in....
 1357 options         SES_ENABLE_PASSTHROUGH
 1358 
 1359 
 1360 #####################################################################
 1361 # MISCELLANEOUS DEVICES AND OPTIONS
 1362 
 1363 device          pty             #BSD-style compatibility pseudo ttys
 1364 device          nmdm            #back-to-back tty devices
 1365 device          md              #Memory/malloc disk
 1366 device          snp             #Snoop device - to look at pty/vty/etc..
 1367 device          ccd             #Concatenated disk driver
 1368 device          firmware        #firmware(9) support
 1369 
 1370 # Kernel side iconv library
 1371 options         LIBICONV
 1372 
 1373 # Size of the kernel message buffer.  Should be N * pagesize.
 1374 options         MSGBUF_SIZE=40960
 1375 
 1376 
 1377 #####################################################################
 1378 # HARDWARE DEVICE CONFIGURATION
 1379 
 1380 # For ISA the required hints are listed.
 1381 # EISA, MCA, PCI, CardBus, SD/MMC and pccard are self identifying buses, so
 1382 # no hints are needed.
 1383 
 1384 #
 1385 # Mandatory devices:
 1386 #
 1387 
 1388 # These options are valid for other keyboard drivers as well.
 1389 options         KBD_DISABLE_KEYMAP_LOAD # refuse to load a keymap
 1390 options         KBD_INSTALL_CDEV        # install a CDEV entry in /dev
 1391 
 1392 options         FB_DEBUG                # Frame buffer debugging
 1393 
 1394 device          splash                  # Splash screen and screen saver support
 1395 
 1396 # Various screen savers.
 1397 device          blank_saver
 1398 device          daemon_saver
 1399 device          dragon_saver
 1400 device          fade_saver
 1401 device          fire_saver
 1402 device          green_saver
 1403 device          logo_saver
 1404 device          rain_saver
 1405 device          snake_saver
 1406 device          star_saver
 1407 device          warp_saver
 1408 
 1409 # The syscons console driver (SCO color console compatible).
 1410 device          sc
 1411 hint.sc.0.at="isa"
 1412 options         MAXCONS=16              # number of virtual consoles
 1413 options         SC_ALT_MOUSE_IMAGE      # simplified mouse cursor in text mode
 1414 options         SC_DFLT_FONT            # compile font in
 1415 makeoptions     SC_DFLT_FONT=cp850
 1416 options         SC_DISABLE_KDBKEY       # disable `debug' key
 1417 options         SC_DISABLE_REBOOT       # disable reboot key sequence
 1418 options         SC_HISTORY_SIZE=200     # number of history buffer lines
 1419 options         SC_MOUSE_CHAR=0x3       # char code for text mode mouse cursor
 1420 options         SC_PIXEL_MODE           # add support for the raster text mode
 1421 
 1422 # The following options will let you change the default colors of syscons.
 1423 options         SC_NORM_ATTR=(FG_GREEN|BG_BLACK)
 1424 options         SC_NORM_REV_ATTR=(FG_YELLOW|BG_GREEN)
 1425 options         SC_KERNEL_CONS_ATTR=(FG_RED|BG_BLACK)
 1426 options         SC_KERNEL_CONS_REV_ATTR=(FG_BLACK|BG_RED)
 1427 
 1428 # The following options will let you change the default behaviour of
 1429 # cut-n-paste feature
 1430 options         SC_CUT_SPACES2TABS      # convert leading spaces into tabs
 1431 options         SC_CUT_SEPCHARS=\"x09\" # set of characters that delimit words
 1432                                         # (default is single space - \"x20\")
 1433 
 1434 # If you have a two button mouse, you may want to add the following option
 1435 # to use the right button of the mouse to paste text.
 1436 options         SC_TWOBUTTON_MOUSE
 1437 
 1438 # You can selectively disable features in syscons.
 1439 options         SC_NO_CUTPASTE
 1440 options         SC_NO_FONT_LOADING
 1441 options         SC_NO_HISTORY
 1442 options         SC_NO_MODE_CHANGE
 1443 options         SC_NO_SYSMOUSE
 1444 options         SC_NO_SUSPEND_VTYSWITCH
 1445 
 1446 # `flags' for sc
 1447 #       0x80    Put the video card in the VESA 800x600 dots, 16 color mode
 1448 #       0x100   Probe for a keyboard device periodically if one is not present
 1449 
 1450 # Enable experimental features of the syscons terminal emulator (teken).
 1451 options         TEKEN_CONS25            # cons25-style terminal emulation
 1452 options         TEKEN_UTF8              # UTF-8 output handling
 1453 
 1454 #
 1455 # Optional devices:
 1456 #
 1457 
 1458 #
 1459 # SCSI host adapters:
 1460 #
 1461 # adv: All Narrow SCSI bus AdvanSys controllers.
 1462 # adw: Second Generation AdvanSys controllers including the ADV940UW.
 1463 # aha: Adaptec 154x/1535/1640
 1464 # ahb: Adaptec 174x EISA controllers
 1465 # ahc: Adaptec 274x/284x/2910/293x/294x/394x/3950x/3960x/398X/4944/
 1466 #      19160x/29160x, aic7770/aic78xx
 1467 # ahd: Adaptec 29320/39320 Controllers.
 1468 # aic: Adaptec 6260/6360, APA-1460 (PC Card), NEC PC9801-100 (C-BUS)
 1469 # amd: Support for the AMD 53C974 SCSI host adapter chip as found on devices
 1470 #      such as the Tekram DC-390(T).
 1471 # bt:  Most Buslogic controllers: including BT-445, BT-54x, BT-64x, BT-74x,
 1472 #      BT-75x, BT-946, BT-948, BT-956, BT-958, SDC3211B, SDC3211F, SDC3222F
 1473 # esp: Emulex ESP, NCR 53C9x and QLogic FAS families based controllers
 1474 #      including the AMD Am53C974 (found on devices such as the Tekram
 1475 #      DC-390(T)) and the Sun ESP and FAS families of controllers
 1476 # isp: Qlogic ISP 1020, 1040 and 1040B PCI SCSI host adapters,
 1477 #      ISP 1240 Dual Ultra SCSI, ISP 1080 and 1280 (Dual) Ultra2,
 1478 #      ISP 12160 Ultra3 SCSI,
 1479 #      Qlogic ISP 2100 and ISP 2200 1Gb Fibre Channel host adapters.
 1480 #      Qlogic ISP 2300 and ISP 2312 2Gb Fibre Channel host adapters.
 1481 #      Qlogic ISP 2322 and ISP 6322 2Gb Fibre Channel host adapters.
 1482 # ispfw: Firmware module for Qlogic host adapters
 1483 # mpt: LSI-Logic MPT/Fusion 53c1020 or 53c1030 Ultra4
 1484 #      or FC9x9 Fibre Channel host adapters.
 1485 # ncr: NCR 53C810, 53C825 self-contained SCSI host adapters.
 1486 # sym: Symbios/Logic 53C8XX family of PCI-SCSI I/O processors:
 1487 #      53C810, 53C810A, 53C815, 53C825,  53C825A, 53C860, 53C875,
 1488 #      53C876, 53C885,  53C895, 53C895A, 53C896,  53C897, 53C1510D,
 1489 #      53C1010-33, 53C1010-66.
 1490 # trm: Tekram DC395U/UW/F DC315U adapters.
 1491 # wds: WD7000
 1492 
 1493 #
 1494 # Note that the order is important in order for Buslogic ISA/EISA cards to be
 1495 # probed correctly.
 1496 #
 1497 device          bt
 1498 hint.bt.0.at="isa"
 1499 hint.bt.0.port="0x330"
 1500 device          adv
 1501 hint.adv.0.at="isa"
 1502 device          adw
 1503 device          aha
 1504 hint.aha.0.at="isa"
 1505 device          aic
 1506 hint.aic.0.at="isa"
 1507 device          ahb
 1508 device          ahc
 1509 device          ahd
 1510 device          amd
 1511 device          esp
 1512 device          iscsi_initiator
 1513 device          isp
 1514 hint.isp.0.disable="1"
 1515 hint.isp.0.role="3"
 1516 hint.isp.0.prefer_iomap="1"
 1517 hint.isp.0.prefer_memmap="1"
 1518 hint.isp.0.fwload_disable="1"
 1519 hint.isp.0.ignore_nvram="1"
 1520 hint.isp.0.fullduplex="1"
 1521 hint.isp.0.topology="lport"
 1522 hint.isp.0.topology="nport"
 1523 hint.isp.0.topology="lport-only"
 1524 hint.isp.0.topology="nport-only"
 1525 # we can't get u_int64_t types, nor can we get strings if it's got
 1526 # a leading 0x, hence this silly dodge.
 1527 hint.isp.0.portwnn="w50000000aaaa0000"
 1528 hint.isp.0.nodewnn="w50000000aaaa0001"
 1529 device          ispfw
 1530 device          mpt
 1531 device          ncr
 1532 device          sym
 1533 device          trm
 1534 device          wds
 1535 hint.wds.0.at="isa"
 1536 hint.wds.0.port="0x350"
 1537 hint.wds.0.irq="11"
 1538 hint.wds.0.drq="6"
 1539 
 1540 # The aic7xxx driver will attempt to use memory mapped I/O for all PCI
 1541 # controllers that have it configured only if this option is set. Unfortunately,
 1542 # this doesn't work on some motherboards, which prevents it from being the
 1543 # default.
 1544 options         AHC_ALLOW_MEMIO
 1545 
 1546 # Dump the contents of the ahc controller configuration PROM.
 1547 options         AHC_DUMP_EEPROM
 1548 
 1549 # Bitmap of units to enable targetmode operations.
 1550 options         AHC_TMODE_ENABLE
 1551 
 1552 # Compile in Aic7xxx Debugging code.
 1553 options         AHC_DEBUG
 1554 
 1555 # Aic7xxx driver debugging options. See sys/dev/aic7xxx/aic7xxx.h
 1556 options         AHC_DEBUG_OPTS
 1557 
 1558 # Print register bitfields in debug output.  Adds ~128k to driver
 1559 # See ahc(4).
 1560 options         AHC_REG_PRETTY_PRINT
 1561 
 1562 # Compile in aic79xx debugging code.
 1563 options         AHD_DEBUG
 1564 
 1565 # Aic79xx driver debugging options.  Adds ~215k to driver.  See ahd(4).
 1566 options         AHD_DEBUG_OPTS=0xFFFFFFFF
 1567 
 1568 # Print human-readable register definitions when debugging
 1569 options         AHD_REG_PRETTY_PRINT
 1570 
 1571 # Bitmap of units to enable targetmode operations.
 1572 options         AHD_TMODE_ENABLE
 1573 
 1574 # The adw driver will attempt to use memory mapped I/O for all PCI
 1575 # controllers that have it configured only if this option is set.
 1576 options         ADW_ALLOW_MEMIO
 1577 
 1578 # Options used in dev/iscsi (Software iSCSI stack)
 1579 #
 1580 options         ISCSI_INITIATOR_DEBUG=9
 1581 
 1582 # Options used in dev/isp/ (Qlogic SCSI/FC driver).
 1583 #
 1584 #       ISP_TARGET_MODE         -       enable target mode operation
 1585 #
 1586 options         ISP_TARGET_MODE=1
 1587 #
 1588 #       ISP_DEFAULT_ROLES       -       default role
 1589 #               none=0
 1590 #               target=1
 1591 #               initiator=2
 1592 #               both=3                  (not supported currently)
 1593 #
 1594 #       ISP_INTERNAL_TARGET             (trivial internal disk target, for testing)
 1595 #
 1596 options         ISP_DEFAULT_ROLES=0
 1597 
 1598 # Options used in dev/sym/ (Symbios SCSI driver).
 1599 #options        SYM_SETUP_LP_PROBE_MAP  #-Low Priority Probe Map (bits)
 1600                                         # Allows the ncr to take precedence
 1601                                         # 1 (1<<0) -> 810a, 860
 1602                                         # 2 (1<<1) -> 825a, 875, 885, 895
 1603                                         # 4 (1<<2) -> 895a, 896, 1510d
 1604 #options        SYM_SETUP_SCSI_DIFF     #-HVD support for 825a, 875, 885
 1605                                         # disabled:0 (default), enabled:1
 1606 #options        SYM_SETUP_PCI_PARITY    #-PCI parity checking
 1607                                         # disabled:0, enabled:1 (default)
 1608 #options        SYM_SETUP_MAX_LUN       #-Number of LUNs supported
 1609                                         # default:8, range:[1..64]
 1610 
 1611 # The 'dpt' driver provides support for old DPT controllers (http://www.dpt.com/).
 1612 # These have hardware RAID-{0,1,5} support, and do multi-initiator I/O.
 1613 # The DPT controllers are commonly re-licensed under other brand-names -
 1614 # some controllers by Olivetti, Dec, HP, AT&T, SNI, AST, Alphatronic, NEC and
 1615 # Compaq are actually DPT controllers.
 1616 #
 1617 # See src/sys/dev/dpt for debugging and other subtle options.
 1618 #   DPT_MEASURE_PERFORMANCE Enables a set of (semi)invasive metrics. Various
 1619 #                           instruments are enabled.  The tools in
 1620 #                           /usr/sbin/dpt_* assume these to be enabled.
 1621 #   DPT_HANDLE_TIMEOUTS     Normally device timeouts are handled by the DPT.
 1622 #                           If you want the driver to handle timeouts, enable
 1623 #                           this option.  If your system is very busy, this
 1624 #                           option will create more trouble than solve.
 1625 #   DPT_TIMEOUT_FACTOR      Used to compute the excessive amount of time to
 1626 #                           wait when timing out with the above option.
 1627 #  DPT_DEBUG_xxxx           These are controllable from sys/dev/dpt/dpt.h
 1628 #  DPT_LOST_IRQ             When enabled, will try, once per second, to catch
 1629 #                           any interrupt that got lost.  Seems to help in some
 1630 #                           DPT-firmware/Motherboard combinations.  Minimal
 1631 #                           cost, great benefit.
 1632 #  DPT_RESET_HBA            Make "reset" actually reset the controller
 1633 #                           instead of fudging it.  Only enable this if you
 1634 #                           are 100% certain you need it.
 1635 
 1636 device          dpt
 1637 
 1638 # DPT options
 1639 #!CAM# options  DPT_MEASURE_PERFORMANCE
 1640 #!CAM# options  DPT_HANDLE_TIMEOUTS
 1641 options         DPT_TIMEOUT_FACTOR=4
 1642 options         DPT_LOST_IRQ
 1643 options         DPT_RESET_HBA
 1644 
 1645 #
 1646 # Compaq "CISS" RAID controllers (SmartRAID 5* series)
 1647 # These controllers have a SCSI-like interface, and require the
 1648 # CAM infrastructure.
 1649 #
 1650 device          ciss
 1651 
 1652 #
 1653 # Intel Integrated RAID controllers.
 1654 # This driver was developed and is maintained by Intel.  Contacts
 1655 # at Intel for this driver are
 1656 # "Kannanthanam, Boji T" <boji.t.kannanthanam@intel.com> and
 1657 # "Leubner, Achim" <achim.leubner@intel.com>.
 1658 #
 1659 device          iir
 1660 
 1661 #
 1662 # Mylex AcceleRAID and eXtremeRAID controllers with v6 and later
 1663 # firmware.  These controllers have a SCSI-like interface, and require
 1664 # the CAM infrastructure.
 1665 #
 1666 device          mly
 1667 
 1668 #
 1669 # Compaq Smart RAID, Mylex DAC960 and AMI MegaRAID controllers.  Only
 1670 # one entry is needed; the code will find and configure all supported
 1671 # controllers.
 1672 #
 1673 device          ida             # Compaq Smart RAID
 1674 device          mlx             # Mylex DAC960
 1675 device          amr             # AMI MegaRAID
 1676 device          amrp            # SCSI Passthrough interface (optional, CAM req.)
 1677 device          mfi             # LSI MegaRAID SAS
 1678 device          mfip            # LSI MegaRAID SAS passthrough, requires CAM
 1679 options         MFI_DEBUG
 1680 
 1681 #
 1682 # 3ware ATA RAID
 1683 #
 1684 device          twe             # 3ware ATA RAID
 1685 
 1686 #
 1687 # Serial ATA host controllers:
 1688 #
 1689 # ahci: Advanced Host Controller Interface (AHCI) compatible
 1690 # mvs:  Marvell 88SX50XX/88SX60XX/88SX70XX/SoC controllers
 1691 # siis: SiliconImage SiI3124/SiI3132/SiI3531 controllers
 1692 #
 1693 # These drivers are part of cam(4) subsystem. They supersede less featured
 1694 # ata(4) subsystem drivers, supporting same hardware.
 1695 
 1696 device          ahci
 1697 device          mvs
 1698 device          siis
 1699 
 1700 #
 1701 # The 'ATA' driver supports all ATA and ATAPI devices, including PC Card
 1702 # devices. You only need one "device ata" for it to find all
 1703 # PCI and PC Card ATA/ATAPI devices on modern machines.
 1704 # Alternatively, individual bus and chipset drivers may be chosen by using
 1705 # the 'atacore' driver then selecting the drivers on a per vendor basis.
 1706 # For example to build a system which only supports a VIA chipset,
 1707 # omit 'ata' and include the 'atacore', 'atapci' and 'atavia' drivers.
 1708 device          ata
 1709 #device         atadisk         # ATA disk drives
 1710 #device         ataraid         # ATA RAID drives
 1711 #device         atapicd         # ATAPI CDROM drives
 1712 #device         atapifd         # ATAPI floppy drives
 1713 #device         atapist         # ATAPI tape drives
 1714 #device         atapicam        # emulate ATAPI devices as SCSI ditto via CAM
 1715                                 # needs CAM to be present (scbus & pass)
 1716 
 1717 # Modular ATA
 1718 #device         atacore         # Core ATA functionality
 1719 #device         atacard         # CARDBUS support
 1720 #device         atabus          # PC98 cbus support
 1721 #device         ataisa          # ISA bus support
 1722 #device         atapci          # PCI bus support; only generic chipset support
 1723 
 1724 # PCI ATA chipsets
 1725 #device         ataahci         # AHCI SATA
 1726 #device         ataacard        # ACARD
 1727 #device         ataacerlabs     # Acer Labs Inc. (ALI)
 1728 #device         ataadaptec      # Adaptec
 1729 #device         ataamd          # American Micro Devices (AMD)
 1730 #device         ataati          # ATI
 1731 #device         atacenatek      # Cenatek
 1732 #device         atacypress      # Cypress
 1733 #device         atacyrix        # Cyrix
 1734 #device         atahighpoint    # HighPoint
 1735 #device         ataintel        # Intel
 1736 #device         ataite          # Integrated Technology Inc. (ITE)
 1737 #device         atajmicron      # JMicron
 1738 #device         atamarvell      # Marvell
 1739 #device         atamicron       # Micron
 1740 #device         atanational     # National
 1741 #device         atanetcell      # NetCell
 1742 #device         atanvidia       # nVidia
 1743 #device         atapromise      # Promise
 1744 #device         ataserverworks  # ServerWorks
 1745 #device         atasiliconimage # Silicon Image Inc. (SiI) (formerly CMD)
 1746 #device         atasis          # Silicon Integrated Systems Corp.(SiS)
 1747 #device         atavia          # VIA Technologies Inc.
 1748 
 1749 #
 1750 # For older non-PCI, non-PnPBIOS systems, these are the hints lines to add:
 1751 hint.ata.0.at="isa"
 1752 hint.ata.0.port="0x1f0"
 1753 hint.ata.0.irq="14"
 1754 hint.ata.1.at="isa"
 1755 hint.ata.1.port="0x170"
 1756 hint.ata.1.irq="15"
 1757 
 1758 #
 1759 # The following options are valid on the ATA driver:
 1760 #
 1761 # ATA_STATIC_ID:        controller numbering is static ie depends on location
 1762 #                       else the device numbers are dynamically allocated.
 1763 # ATA_REQUEST_TIMEOUT:  the number of seconds to wait for an ATA request
 1764 #                       before timing out.
 1765 # ATA_CAM:              Turn ata(4) subsystem controller drivers into cam(4)
 1766 #                       interface modules. This deprecates all ata(4)
 1767 #                       peripheral device drivers (atadisk, ataraid, atapicd,
 1768 #                       atapifd, atapist, atapicam) and all user-level APIs.
 1769 #                       cam(4) drivers and APIs will be connected instead.
 1770 
 1771 options         ATA_STATIC_ID
 1772 #options        ATA_REQUEST_TIMEOUT=10
 1773 options         ATA_CAM
 1774 
 1775 #
 1776 # Standard floppy disk controllers and floppy tapes, supports
 1777 # the Y-E DATA External FDD (PC Card)
 1778 #
 1779 device          fdc
 1780 hint.fdc.0.at="isa"
 1781 hint.fdc.0.port="0x3F0"
 1782 hint.fdc.0.irq="6"
 1783 hint.fdc.0.drq="2"
 1784 #
 1785 # FDC_DEBUG enables floppy debugging.  Since the debug output is huge, you
 1786 # gotta turn it actually on by setting the variable fd_debug with DDB,
 1787 # however.
 1788 options         FDC_DEBUG
 1789 #
 1790 # Activate this line if you happen to have an Insight floppy tape.
 1791 # Probing them proved to be dangerous for people with floppy disks only,
 1792 # so it's "hidden" behind a flag:
 1793 #hint.fdc.0.flags="1"
 1794 
 1795 # Specify floppy devices
 1796 hint.fd.0.at="fdc0"
 1797 hint.fd.0.drive="0"
 1798 hint.fd.1.at="fdc0"
 1799 hint.fd.1.drive="1"
 1800 
 1801 #
 1802 # uart: newbusified driver for serial interfaces.  It consolidates the sio(4),
 1803 #       sab(4) and zs(4) drivers.
 1804 #
 1805 device          uart
 1806 
 1807 # Options for uart(4)
 1808 options         UART_PPS_ON_CTS         # Do time pulse capturing using CTS
 1809                                         # instead of DCD.
 1810 
 1811 # The following hint should only be used for pure ISA devices.  It is not
 1812 # needed otherwise.  Use of hints is strongly discouraged.
 1813 hint.uart.0.at="isa"
 1814 
 1815 # The following 3 hints are used when the UART is a system device (i.e., a
 1816 # console or debug port), but only on platforms that don't have any other
 1817 # means to pass the information to the kernel.  The unit number of the hint
 1818 # is only used to bundle the hints together.  There is no relation to the
 1819 # unit number of the probed UART.
 1820 hint.uart.0.port="0x3f8"
 1821 hint.uart.0.flags="0x10"
 1822 hint.uart.0.baud="115200"
 1823 
 1824 # `flags' for serial drivers that support consoles like sio(4) and uart(4):
 1825 #       0x10    enable console support for this unit.  Other console flags
 1826 #               (if applicable) are ignored unless this is set.  Enabling
 1827 #               console support does not make the unit the preferred console.
 1828 #               Boot with -h or set boot_serial=YES in the loader.  For sio(4)
 1829 #               specifically, the 0x20 flag can also be set (see above).
 1830 #               Currently, at most one unit can have console support; the
 1831 #               first one (in config file order) with this flag set is
 1832 #               preferred.  Setting this flag for sio0 gives the old behaviour.
 1833 #       0x80    use this port for serial line gdb support in ddb.  Also known
 1834 #               as debug port.
 1835 #
 1836 
 1837 # Options for serial drivers that support consoles:
 1838 options         BREAK_TO_DEBUGGER       # A BREAK on a serial console goes to
 1839                                         # ddb, if available.
 1840 
 1841 # Solaris implements a new BREAK which is initiated by a character
 1842 # sequence CR ~ ^b which is similar to a familiar pattern used on
 1843 # Sun servers by the Remote Console.  There are FreeBSD extensions:
 1844 # CR ~ ^p requests force panic and CR ~ ^r requests a clean reboot.
 1845 options         ALT_BREAK_TO_DEBUGGER
 1846 
 1847 # Serial Communications Controller
 1848 # Supports the Siemens SAB 82532 and Zilog Z8530 multi-channel
 1849 # communications controllers.
 1850 device          scc
 1851 
 1852 # PCI Universal Communications driver
 1853 # Supports various multi port PCI I/O cards.
 1854 device          puc
 1855 
 1856 #
 1857 # Network interfaces:
 1858 #
 1859 # MII bus support is required for many PCI Ethernet NICs,
 1860 # namely those which use MII-compliant transceivers or implement
 1861 # transceiver control interfaces that operate like an MII.  Adding
 1862 # "device miibus" to the kernel config pulls in support for the generic
 1863 # miibus API, the common support for for bit-bang'ing the MII and all
 1864 # of the PHY drivers, including a generic one for PHYs that aren't
 1865 # specifically handled by an individual driver.  Support for specific
 1866 # PHYs may be built by adding "device mii", "device mii_bitbang" if
 1867 # needed by the NIC driver and then adding the appropriate PHY driver.
 1868 device          mii             # Minimal MII support
 1869 device          mii_bitbang     # Common module for bit-bang'ing the MII
 1870 device          miibus          # MII support w/ bit-bang'ing and all PHYs
 1871 
 1872 device          acphy           # Altima Communications AC101
 1873 device          amphy           # AMD AM79c873 / Davicom DM910{1,2}
 1874 device          atphy           # Attansic/Atheros F1
 1875 device          axphy           # Asix Semiconductor AX88x9x
 1876 device          bmtphy          # Broadcom BCM5201/BCM5202 and 3Com 3c905C
 1877 device          brgphy          # Broadcom BCM54xx/57xx 1000baseTX
 1878 device          ciphy           # Cicada/Vitesse CS/VSC8xxx
 1879 device          e1000phy        # Marvell 88E1000 1000/100/10-BT
 1880 device          gentbi          # Generic 10-bit 1000BASE-{LX,SX} fiber ifaces
 1881 device          icsphy          # ICS ICS1889-1893
 1882 device          ip1000phy       # IC Plus IP1000A/IP1001
 1883 device          jmphy           # JMicron JMP211/JMP202
 1884 device          lxtphy          # Level One LXT-970
 1885 device          mlphy           # Micro Linear 6692
 1886 device          nsgphy          # NatSemi DP8361/DP83865/DP83891
 1887 device          nsphy           # NatSemi DP83840A
 1888 device          nsphyter        # NatSemi DP83843/DP83815
 1889 device          pnaphy          # HomePNA
 1890 device          qsphy           # Quality Semiconductor QS6612
 1891 device          rdcphy          # RDC Semiconductor R6040
 1892 device          rgephy          # RealTek 8169S/8110S/8211B/8211C
 1893 device          rlphy           # RealTek 8139
 1894 device          rlswitch        # RealTek 8305
 1895 device          smcphy          # SMSC LAN91C111
 1896 device          tdkphy          # TDK 89Q2120
 1897 device          tlphy           # Texas Instruments ThunderLAN
 1898 device          truephy         # LSI TruePHY
 1899 device          xmphy           # XaQti XMAC II
 1900 
 1901 # an:   Aironet 4500/4800 802.11 wireless adapters. Supports the PCMCIA,
 1902 #       PCI and ISA varieties.
 1903 # ae:   Support for gigabit ethernet adapters based on the Attansic/Atheros
 1904 #       L2 PCI-Express FastEthernet controllers.
 1905 # age:  Support for gigabit ethernet adapters based on the Attansic/Atheros
 1906 #       L1 PCI express gigabit ethernet controllers.
 1907 # alc:  Support for Atheros AR8131/AR8132 PCIe ethernet controllers.
 1908 # ale:  Support for Atheros AR8121/AR8113/AR8114 PCIe ethernet controllers.
 1909 # ath:  Atheros a/b/g WiFi adapters (requires ath_hal and wlan)
 1910 # bce:  Broadcom NetXtreme II (BCM5706/BCM5708) PCI/PCIe Gigabit Ethernet
 1911 #       adapters.
 1912 # bfe:  Broadcom BCM4401 Ethernet adapter.
 1913 # bge:  Support for gigabit ethernet adapters based on the Broadcom
 1914 #       BCM570x family of controllers, including the 3Com 3c996-T,
 1915 #       the Netgear GA302T, the SysKonnect SK-9D21 and SK-9D41, and
 1916 #       the embedded gigE NICs on Dell PowerEdge 2550 servers.
 1917 # bxe:  Broadcom NetXtreme II (BCM57710/57711/57711E) PCIe 10b Ethernet
 1918 #       adapters.
 1919 # bwi:  Broadcom BCM430* and BCM431* family of wireless adapters.
 1920 # bwn:  Broadcom BCM43xx family of wireless adapters.
 1921 # cas:  Sun Cassini/Cassini+ and National Semiconductor DP83065 Saturn
 1922 # cm:   Arcnet SMC COM90c26 / SMC COM90c56
 1923 #       (and SMC COM90c66 in '56 compatibility mode) adapters.
 1924 # cxgbe: Support for PCI express 10Gb/1Gb adapters based on the Chelsio T4
 1925 #       (Terminator 4) ASIC.
 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 # msk:  Support for gigabit ethernet adapters based on the Marvell/SysKonnect
 1959 #       Yukon II Gigabit controllers, including 88E8021, 88E8022, 88E8061,
 1960 #       88E8062, 88E8035, 88E8036, 88E8038, 88E8050, 88E8052, 88E8053,
 1961 #       88E8055, 88E8056 and D-Link 560T/550SX.
 1962 # lmc:  Support for the LMC/SBE wide-area network interface cards.
 1963 # my:   Myson Fast Ethernet (MTD80X, MTD89X)
 1964 # nge:  Support for PCI gigabit ethernet adapters based on the National
 1965 #       Semiconductor DP83820 and DP83821 chipset. This includes the
 1966 #       SMC EZ Card 1000 (SMC9462TX), D-Link DGE-500T, Asante FriendlyNet
 1967 #       GigaNIX 1000TA and 1000TPC, the Addtron AEG320T, the Surecom
 1968 #       EP-320G-TX and the Netgear GA622T.
 1969 # oce:  Emulex 10 Gbit adapters (OneConnect Ethernet)
 1970 # pcn:  Support for PCI fast ethernet adapters based on the AMD Am79c97x
 1971 #       PCnet-FAST, PCnet-FAST+, PCnet-FAST III, PCnet-PRO and PCnet-Home
 1972 #       chipsets. These can also be handled by the le(4) driver if the
 1973 #       pcn(4) driver is left out of the kernel. The le(4) driver does not
 1974 #       support the additional features like the MII bus and burst mode of
 1975 #       the PCnet-FAST and greater chipsets though.
 1976 # ral:  Ralink Technology IEEE 802.11 wireless adapter
 1977 # re:   RealTek 8139C+/8169/816xS/811xS/8101E PCI/PCIe Ethernet adapter
 1978 # rl:   Support for PCI fast ethernet adapters based on the RealTek 8129/8139
 1979 #       chipset.  Note that the RealTek driver defaults to using programmed
 1980 #       I/O to do register accesses because memory mapped mode seems to cause
 1981 #       severe lockups on SMP hardware.  This driver also supports the
 1982 #       Accton EN1207D `Cheetah' adapter, which uses a chip called
 1983 #       the MPX 5030/5038, which is either a RealTek in disguise or a
 1984 #       RealTek workalike.  Note that the D-Link DFE-530TX+ uses the RealTek
 1985 #       chipset and is supported by this driver, not the 'vr' driver.
 1986 # sf:   Support for Adaptec Duralink PCI fast ethernet adapters based on the
 1987 #       Adaptec AIC-6915 "starfire" controller.
 1988 #       This includes dual and quad port cards, as well as one 100baseFX card.
 1989 #       Most of these are 64-bit PCI devices, except for one single port
 1990 #       card which is 32-bit.
 1991 # sge:  Silicon Integrated Systems SiS190/191 Fast/Gigabit Ethernet adapter
 1992 # sis:  Support for NICs based on the Silicon Integrated Systems SiS 900,
 1993 #       SiS 7016 and NS DP83815 PCI fast ethernet controller chips.
 1994 # sk:   Support for the SysKonnect SK-984x series PCI gigabit ethernet NICs.
 1995 #       This includes the SK-9841 and SK-9842 single port cards (single mode
 1996 #       and multimode fiber) and the SK-9843 and SK-9844 dual port cards
 1997 #       (also single mode and multimode).
 1998 #       The driver will autodetect the number of ports on the card and
 1999 #       attach each one as a separate network interface.
 2000 # sn:   Support for ISA and PC Card Ethernet devices using the
 2001 #       SMC91C90/92/94/95 chips.
 2002 # ste:  Sundance Technologies ST201 PCI fast ethernet controller, includes
 2003 #       the D-Link DFE-550TX.
 2004 # stge: Support for gigabit ethernet adapters based on the Sundance/Tamarack
 2005 #       TC9021 family of controllers, including the Sundance ST2021/ST2023,
 2006 #       the Sundance/Tamarack TC9021, the D-Link DL-4000 and ASUS NX1101.
 2007 # ti:   Support for PCI gigabit ethernet NICs based on the Alteon Networks
 2008 #       Tigon 1 and Tigon 2 chipsets.  This includes the Alteon AceNIC, the
 2009 #       3Com 3c985, the Netgear GA620 and various others.  Note that you will
 2010 #       probably want to bump up kern.ipc.nmbclusters a lot to use this driver.
 2011 # tl:   Support for the Texas Instruments TNETE100 series 'ThunderLAN'
 2012 #       cards and integrated ethernet controllers.  This includes several
 2013 #       Compaq Netelligent 10/100 cards and the built-in ethernet controllers
 2014 #       in several Compaq Prosignia, Proliant and Deskpro systems.  It also
 2015 #       supports several Olicom 10Mbps and 10/100 boards.
 2016 # tx:   SMC 9432 TX, BTX and FTX cards. (SMC EtherPower II series)
 2017 # txp:  Support for 3Com 3cR990 cards with the "Typhoon" chipset
 2018 # vr:   Support for various fast ethernet adapters based on the VIA
 2019 #       Technologies VT3043 `Rhine I' and VT86C100A `Rhine II' chips,
 2020 #       including the D-Link DFE520TX and D-Link DFE530TX (see 'rl' for
 2021 #       DFE530TX+), the Hawking Technologies PN102TX, and the AOpen/Acer ALN-320.
 2022 # vte:  DM&P Vortex86 RDC R6040 Fast Ethernet
 2023 # vx:   3Com 3C590 and 3C595
 2024 # wb:   Support for fast ethernet adapters based on the Winbond W89C840F chip.
 2025 #       Note: this is not the same as the Winbond W89C940F, which is a
 2026 #       NE2000 clone.
 2027 # wi:   Lucent WaveLAN/IEEE 802.11 PCMCIA adapters. Note: this supports both
 2028 #       the PCMCIA and ISA cards: the ISA card is really a PCMCIA to ISA
 2029 #       bridge with a PCMCIA adapter plugged into it.
 2030 # xe:   Xircom/Intel EtherExpress Pro100/16 PC Card ethernet controller,
 2031 #       Accton Fast EtherCard-16, Compaq Netelligent 10/100 PC Card,
 2032 #       Toshiba 10/100 Ethernet PC Card, Xircom 16-bit Ethernet + Modem 56
 2033 # xl:   Support for the 3Com 3c900, 3c905, 3c905B and 3c905C (Fast)
 2034 #       Etherlink XL cards and integrated controllers.  This includes the
 2035 #       integrated 3c905B-TX chips in certain Dell Optiplex and Dell
 2036 #       Precision desktop machines and the integrated 3c905-TX chips
 2037 #       in Dell Latitude laptop docking stations.
 2038 #       Also supported: 3Com 3c980(C)-TX, 3Com 3cSOHO100-TX, 3Com 3c450-TX
 2039 
 2040 # Order for ISA/EISA devices is important here
 2041 
 2042 device          cm
 2043 hint.cm.0.at="isa"
 2044 hint.cm.0.port="0x2e0"
 2045 hint.cm.0.irq="9"
 2046 hint.cm.0.maddr="0xdc000"
 2047 device          ep
 2048 device          ex
 2049 device          fe
 2050 hint.fe.0.at="isa"
 2051 hint.fe.0.port="0x300"
 2052 device          fea
 2053 device          sn
 2054 hint.sn.0.at="isa"
 2055 hint.sn.0.port="0x300"
 2056 hint.sn.0.irq="10"
 2057 device          an
 2058 device          wi
 2059 device          xe
 2060 
 2061 # PCI Ethernet NICs that use the common MII bus controller code.
 2062 device          ae              # Attansic/Atheros L2 FastEthernet
 2063 device          age             # Attansic/Atheros L1 Gigabit Ethernet
 2064 device          alc             # Atheros AR8131/AR8132 Ethernet
 2065 device          ale             # Atheros AR8121/AR8113/AR8114 Ethernet
 2066 device          bce             # Broadcom BCM5706/BCM5708 Gigabit Ethernet
 2067 device          bfe             # Broadcom BCM440x 10/100 Ethernet
 2068 device          bge             # Broadcom BCM570xx Gigabit Ethernet
 2069 device          cas             # Sun Cassini/Cassini+ and NS DP83065 Saturn
 2070 device          cxgb            # Chelsio T3 10 Gigabit Ethernet
 2071 device          cxgb_t3fw       # Chelsio T3 10 Gigabit Ethernet firmware
 2072 device          dc              # DEC/Intel 21143 and various workalikes
 2073 device          et              # Agere ET1310 10/100/Gigabit Ethernet
 2074 device          fxp             # Intel EtherExpress PRO/100B (82557, 82558)
 2075 hint.fxp.0.prefer_iomap="0"
 2076 device          gem             # Apple GMAC/Sun ERI/Sun GEM
 2077 device          hme             # Sun HME (Happy Meal Ethernet)
 2078 device          jme             # JMicron JMC250 Gigabit/JMC260 Fast Ethernet
 2079 device          lge             # Level 1 LXT1001 gigabit Ethernet
 2080 device          msk             # Marvell/SysKonnect Yukon II Gigabit Ethernet
 2081 device          my              # Myson Fast Ethernet (MTD80X, MTD89X)
 2082 device          nge             # NatSemi DP83820 gigabit Ethernet
 2083 device          re              # RealTek 8139C+/8169/8169S/8110S
 2084 device          rl              # RealTek 8129/8139
 2085 device          pcn             # AMD Am79C97x PCI 10/100 NICs
 2086 device          sf              # Adaptec AIC-6915 (``Starfire'')
 2087 device          sge             # Silicon Integrated Systems SiS190/191
 2088 device          sis             # Silicon Integrated Systems SiS 900/SiS 7016
 2089 device          sk              # SysKonnect SK-984x & SK-982x gigabit Ethernet
 2090 device          ste             # Sundance ST201 (D-Link DFE-550TX)
 2091 device          stge            # Sundance/Tamarack TC9021 gigabit Ethernet
 2092 device          tl              # Texas Instruments ThunderLAN
 2093 device          tx              # SMC EtherPower II (83c170 ``EPIC'')
 2094 device          vr              # VIA Rhine, Rhine II
 2095 device          vte             # DM&P Vortex86 RDC R6040 Fast Ethernet
 2096 device          wb              # Winbond W89C840F
 2097 device          xl              # 3Com 3c90x (``Boomerang'', ``Cyclone'')
 2098 
 2099 # PCI Ethernet NICs.
 2100 device          bxe             # Broadcom BCM57710/BCM57711/BCM57711E 10Gb Ethernet
 2101 device          cxgbe           # Chelsio T4 10GbE PCIe adapter
 2102 device          de              # DEC/Intel DC21x4x (``Tulip'')
 2103 device          em              # Intel Pro/1000 Gigabit Ethernet
 2104 device          igb             # Intel Pro/1000 PCIE Gigabit Ethernet
 2105 device          ixgb            # Intel Pro/10Gbe PCI-X Ethernet
 2106 device          ixgbe           # Intel Pro/10Gbe PCIE Ethernet
 2107 device          le              # AMD Am7900 LANCE and Am79C9xx PCnet
 2108 device          mxge            # Myricom Myri-10G 10GbE NIC
 2109 device          nxge            # Neterion Xframe 10GbE Server/Storage Adapter
 2110 device          oce             # Emulex 10 GbE (OneConnect Ethernet)
 2111 device          ti              # Alteon Networks Tigon I/II gigabit Ethernet
 2112 device          txp             # 3Com 3cR990 (``Typhoon'')
 2113 device          vx              # 3Com 3c590, 3c595 (``Vortex'')
 2114 device          vxge            # Exar/Neterion XFrame 3100 10GbE
 2115 
 2116 # PCI FDDI NICs.
 2117 device          fpa
 2118 
 2119 # PCI WAN adapters.
 2120 device          lmc
 2121 
 2122 # PCI IEEE 802.11 Wireless NICs
 2123 device          ath             # Atheros pci/cardbus NIC's
 2124 device          ath_hal         # pci/cardbus chip support
 2125 #device         ath_ar5210      # AR5210 chips
 2126 #device         ath_ar5211      # AR5211 chips
 2127 #device         ath_ar5212      # AR5212 chips
 2128 #device         ath_rf2413
 2129 #device         ath_rf2417
 2130 #device         ath_rf2425
 2131 #device         ath_rf5111
 2132 #device         ath_rf5112
 2133 #device         ath_rf5413
 2134 #device         ath_ar5416      # AR5416 chips
 2135 options         AH_SUPPORT_AR5416       # enable AR5416 tx/rx descriptors
 2136 # All of the AR5212 parts have a problem when paired with the AR71xx
 2137 # CPUS.  These parts have a bug that triggers a fatal bus error on the AR71xx
 2138 # only.  Details of the exact nature of the bug are sketchy, but some can be
 2139 # found at https://forum.openwrt.org/viewtopic.php?pid=70060 on pages 4, 5 and
 2140 # 6.  This option enables this workaround.  There is a performance penalty
 2141 # for this work around, but without it things don't work at all.  The DMA
 2142 # from the card usually bursts 128 bytes, but on the affected CPUs, only
 2143 # 4 are safe.
 2144 options         AH_RXCFG_SDMAMW_4BYTES
 2145 #device         ath_ar9160      # AR9160 chips
 2146 #device         ath_ar9280      # AR9280 chips
 2147 #device         ath_ar9285      # AR9285 chips
 2148 device          ath_rate_sample # SampleRate tx rate control for ath
 2149 device          bwi             # Broadcom BCM430* BCM431*
 2150 device          bwn             # Broadcom BCM43xx
 2151 device          malo            # Marvell Libertas wireless NICs.
 2152 device          mwl             # Marvell 88W8363 802.11n wireless NICs.
 2153 device          ral             # Ralink Technology RT2500 wireless NICs.
 2154 
 2155 # Use sf_buf(9) interface for jumbo buffers on ti(4) controllers.
 2156 #options        TI_SF_BUF_JUMBO
 2157 # Turn on the header splitting option for the ti(4) driver firmware.  This
 2158 # only works for Tigon II chips, and has no effect for Tigon I chips.
 2159 # This option requires the TI_SF_BUF_JUMBO option above.
 2160 #options        TI_JUMBO_HDRSPLIT
 2161 
 2162 #
 2163 # Use header splitting feature on bce(4) adapters.
 2164 # This may help to reduce the amount of jumbo-sized memory buffers used.
 2165 #
 2166 options         BCE_JUMBO_HDRSPLIT
 2167 
 2168 # These two options allow manipulating the mbuf cluster size and mbuf size,
 2169 # respectively.  Be very careful with NIC driver modules when changing
 2170 # these from their default values, because that can potentially cause a
 2171 # mismatch between the mbuf size assumed by the kernel and the mbuf size
 2172 # assumed by a module.  The only driver that currently has the ability to
 2173 # detect a mismatch is ti(4).
 2174 options         MCLSHIFT=12     # mbuf cluster shift in bits, 12 == 4KB
 2175 options         MSIZE=512       # mbuf size in bytes
 2176 
 2177 #
 2178 # ATM related options (Cranor version)
 2179 # (note: this driver cannot be used with the HARP ATM stack)
 2180 #
 2181 # The `en' device provides support for Efficient Networks (ENI)
 2182 # ENI-155 PCI midway cards, and the Adaptec 155Mbps PCI ATM cards (ANA-59x0).
 2183 #
 2184 # The `hatm' device provides support for Fore/Marconi HE155 and HE622
 2185 # ATM PCI cards.
 2186 #
 2187 # The `fatm' device provides support for Fore PCA200E ATM PCI cards.
 2188 #
 2189 # The `patm' device provides support for IDT77252 based cards like
 2190 # ProSum's ProATM-155 and ProATM-25 and IDT's evaluation boards.
 2191 #
 2192 # atm device provides generic atm functions and is required for
 2193 # atm devices.
 2194 # NATM enables the netnatm protocol family that can be used to
 2195 # bypass TCP/IP.
 2196 #
 2197 # utopia provides the access to the ATM PHY chips and is required for en,
 2198 # hatm and fatm.
 2199 #
 2200 # the current driver supports only PVC operations (no atm-arp, no multicast).
 2201 # for more details, please read the original documents at
 2202 # http://www.ccrc.wustl.edu/pub/chuck/tech/bsdatm/bsdatm.html
 2203 #
 2204 device          atm
 2205 device          en
 2206 device          fatm                    #Fore PCA200E
 2207 device          hatm                    #Fore/Marconi HE155/622
 2208 device          patm                    #IDT77252 cards (ProATM and IDT)
 2209 device          utopia                  #ATM PHY driver
 2210 options         NATM                    #native ATM
 2211 
 2212 options         LIBMBPOOL               #needed by patm, iatm
 2213 
 2214 #
 2215 # Sound drivers
 2216 #
 2217 # sound: The generic sound driver.
 2218 #
 2219 
 2220 device          sound
 2221 
 2222 #
 2223 # snd_*: Device-specific drivers.
 2224 #
 2225 # The flags of the device tell the device a bit more info about the
 2226 # device that normally is obtained through the PnP interface.
 2227 #       bit  2..0   secondary DMA channel;
 2228 #       bit  4      set if the board uses two dma channels;
 2229 #       bit 15..8   board type, overrides autodetection; leave it
 2230 #                   zero if don't know what to put in (and you don't,
 2231 #                   since this is unsupported at the moment...).
 2232 #
 2233 # snd_ad1816:           Analog Devices AD1816 ISA PnP/non-PnP.
 2234 # snd_als4000:          Avance Logic ALS4000 PCI.
 2235 # snd_atiixp:           ATI IXP 200/300/400 PCI.
 2236 # snd_audiocs:          Crystal Semiconductor CS4231 SBus/EBus. Only
 2237 #                       for sparc64.
 2238 # snd_cmi:              CMedia CMI8338/CMI8738 PCI.
 2239 # snd_cs4281:           Crystal Semiconductor CS4281 PCI.
 2240 # snd_csa:              Crystal Semiconductor CS461x/428x PCI. (except
 2241 #                       4281)
 2242 # snd_ds1:              Yamaha DS-1 PCI.
 2243 # snd_emu10k1:          Creative EMU10K1 PCI and EMU10K2 (Audigy) PCI.
 2244 # snd_emu10kx:          Creative SoundBlaster Live! and Audigy
 2245 # snd_envy24:           VIA Envy24 and compatible, needs snd_spicds.
 2246 # snd_envy24ht:         VIA Envy24HT and compatible, needs snd_spicds.
 2247 # snd_es137x:           Ensoniq AudioPCI ES137x PCI.
 2248 # snd_ess:              Ensoniq ESS ISA PnP/non-PnP, to be used in
 2249 #                       conjunction with snd_sbc.
 2250 # snd_fm801:            Forte Media FM801 PCI.
 2251 # snd_gusc:             Gravis UltraSound ISA PnP/non-PnP.
 2252 # snd_hda:              Intel High Definition Audio (Controller) and
 2253 #                       compatible.
 2254 # snd_hdspe:            RME HDSPe AIO and RayDAT.
 2255 # snd_ich:              Intel ICH AC'97 and some more audio controllers
 2256 #                       embedded in a chipset, for example nVidia
 2257 #                       nForce controllers.
 2258 # snd_maestro:          ESS Technology Maestro-1/2x PCI.
 2259 # snd_maestro3:         ESS Technology Maestro-3/Allegro PCI.
 2260 # snd_mss:              Microsoft Sound System ISA PnP/non-PnP.
 2261 # snd_neomagic:         Neomagic 256 AV/ZX PCI.
 2262 # snd_sb16:             Creative SoundBlaster16, to be used in
 2263 #                       conjunction with snd_sbc.
 2264 # snd_sb8:              Creative SoundBlaster (pre-16), to be used in
 2265 #                       conjunction with snd_sbc.
 2266 # snd_sbc:              Creative SoundBlaster ISA PnP/non-PnP.
 2267 #                       Supports ESS and Avance ISA chips as well.
 2268 # snd_solo:             ESS Solo-1x PCI.
 2269 # snd_spicds:           SPI codec driver, needed by Envy24/Envy24HT drivers.
 2270 # snd_t4dwave:          Trident 4DWave DX/NX PCI, Sis 7018 PCI and Acer Labs
 2271 #                       M5451 PCI.
 2272 # snd_uaudio:           USB audio.
 2273 # snd_via8233:          VIA VT8233x PCI.
 2274 # snd_via82c686:        VIA VT82C686A PCI.
 2275 # snd_vibes:            S3 Sonicvibes PCI.
 2276 
 2277 device          snd_ad1816
 2278 device          snd_als4000
 2279 device          snd_atiixp
 2280 #device         snd_audiocs
 2281 device          snd_cmi
 2282 device          snd_cs4281
 2283 device          snd_csa
 2284 device          snd_ds1
 2285 device          snd_emu10k1
 2286 device          snd_emu10kx
 2287 device          snd_envy24
 2288 device          snd_envy24ht
 2289 device          snd_es137x
 2290 device          snd_ess
 2291 device          snd_fm801
 2292 device          snd_gusc
 2293 device          snd_hda
 2294 device          snd_hdspe
 2295 device          snd_ich
 2296 device          snd_maestro
 2297 device          snd_maestro3
 2298 device          snd_mss
 2299 device          snd_neomagic
 2300 device          snd_sb16
 2301 device          snd_sb8
 2302 device          snd_sbc
 2303 device          snd_solo
 2304 device          snd_spicds
 2305 device          snd_t4dwave
 2306 device          snd_uaudio
 2307 device          snd_via8233
 2308 device          snd_via82c686
 2309 device          snd_vibes
 2310 
 2311 # For non-PnP sound cards:
 2312 hint.pcm.0.at="isa"
 2313 hint.pcm.0.irq="10"
 2314 hint.pcm.0.drq="1"
 2315 hint.pcm.0.flags="0x0"
 2316 hint.sbc.0.at="isa"
 2317 hint.sbc.0.port="0x220"
 2318 hint.sbc.0.irq="5"
 2319 hint.sbc.0.drq="1"
 2320 hint.sbc.0.flags="0x15"
 2321 hint.gusc.0.at="isa"
 2322 hint.gusc.0.port="0x220"
 2323 hint.gusc.0.irq="5"
 2324 hint.gusc.0.drq="1"
 2325 hint.gusc.0.flags="0x13"
 2326 
 2327 #
 2328 # Following options are intended for debugging/testing purposes:
 2329 #
 2330 # SND_DEBUG                    Enable extra debugging code that includes
 2331 #                              sanity checking and possible increase of
 2332 #                              verbosity.
 2333 #
 2334 # SND_DIAGNOSTIC               Simmilar in a spirit of INVARIANTS/DIAGNOSTIC,
 2335 #                              zero tolerance against inconsistencies.
 2336 #
 2337 # SND_FEEDER_MULTIFORMAT       By default, only 16/32 bit feeders are compiled
 2338 #                              in. This options enable most feeder converters
 2339 #                              except for 8bit. WARNING: May bloat the kernel.
 2340 #
 2341 # SND_FEEDER_FULL_MULTIFORMAT  Ditto, but includes 8bit feeders as well.
 2342 #
 2343 # SND_FEEDER_RATE_HP           (feeder_rate) High precision 64bit arithmetic
 2344 #                              as much as possible (the default trying to
 2345 #                              avoid it). Possible slowdown.
 2346 #
 2347 # SND_PCM_64                   (Only applicable for i386/32bit arch)
 2348 #                              Process 32bit samples through 64bit
 2349 #                              integer/arithmetic. Slight increase of dynamic
 2350 #                              range at a cost of possible slowdown.
 2351 #
 2352 # SND_OLDSTEREO                Only 2 channels are allowed, effectively
 2353 #                              disabling multichannel processing.
 2354 #
 2355 options         SND_DEBUG
 2356 options         SND_DIAGNOSTIC
 2357 options         SND_FEEDER_MULTIFORMAT
 2358 options         SND_FEEDER_FULL_MULTIFORMAT
 2359 options         SND_FEEDER_RATE_HP
 2360 options         SND_PCM_64
 2361 options         SND_OLDSTEREO
 2362 
 2363 #
 2364 # IEEE-488 hardware:
 2365 # pcii:         PCIIA cards (uPD7210 based isa cards)
 2366 # tnt4882:      National Instruments PCI-GPIB card.
 2367 
 2368 device  pcii
 2369 hint.pcii.0.at="isa"
 2370 hint.pcii.0.port="0x2e1"
 2371 hint.pcii.0.irq="5"
 2372 hint.pcii.0.drq="1"
 2373 
 2374 device  tnt4882
 2375 
 2376 #
 2377 # Miscellaneous hardware:
 2378 #
 2379 # scd: Sony CD-ROM using proprietary (non-ATAPI) interface
 2380 # mcd: Mitsumi CD-ROM using proprietary (non-ATAPI) interface
 2381 # bktr: Brooktree bt848/848a/849a/878/879 video capture and TV Tuner board
 2382 # joy: joystick (including IO DATA PCJOY PC Card joystick)
 2383 # cmx: OmniKey CardMan 4040 pccard smartcard reader
 2384 
 2385 # Mitsumi CD-ROM
 2386 device          mcd
 2387 hint.mcd.0.at="isa"
 2388 hint.mcd.0.port="0x300"
 2389 # for the Sony CDU31/33A CDROM
 2390 device          scd
 2391 hint.scd.0.at="isa"
 2392 hint.scd.0.port="0x230"
 2393 device          joy                     # PnP aware, hints for non-PnP only
 2394 hint.joy.0.at="isa"
 2395 hint.joy.0.port="0x201"
 2396 device          cmx
 2397 
 2398 #
 2399 # The 'bktr' device is a PCI video capture device using the Brooktree
 2400 # bt848/bt848a/bt849a/bt878/bt879 chipset. When used with a TV Tuner it forms a
 2401 # TV card, e.g. Miro PC/TV, Hauppauge WinCast/TV WinTV, VideoLogic Captivator,
 2402 # Intel Smart Video III, AverMedia, IMS Turbo, FlyVideo.
 2403 #
 2404 # options       OVERRIDE_CARD=xxx
 2405 # options       OVERRIDE_TUNER=xxx
 2406 # options       OVERRIDE_MSP=1
 2407 # options       OVERRIDE_DBX=1
 2408 # These options can be used to override the auto detection
 2409 # The current values for xxx are found in src/sys/dev/bktr/bktr_card.h
 2410 # Using sysctl(8) run-time overrides on a per-card basis can be made
 2411 #
 2412 # options       BROOKTREE_SYSTEM_DEFAULT=BROOKTREE_PAL
 2413 # or
 2414 # options       BROOKTREE_SYSTEM_DEFAULT=BROOKTREE_NTSC
 2415 # Specifies the default video capture mode.
 2416 # This is required for Dual Crystal (28&35MHz) boards where PAL is used
 2417 # to prevent hangs during initialisation, e.g. VideoLogic Captivator PCI.
 2418 #
 2419 # options       BKTR_USE_PLL
 2420 # This is required for PAL or SECAM boards with a 28MHz crystal and no 35MHz
 2421 # crystal, e.g. some new Bt878 cards.
 2422 #
 2423 # options       BKTR_GPIO_ACCESS
 2424 # This enables IOCTLs which give user level access to the GPIO port.
 2425 #
 2426 # options       BKTR_NO_MSP_RESET
 2427 # Prevents the MSP34xx reset. Good if you initialise the MSP in another OS first
 2428 #
 2429 # options       BKTR_430_FX_MODE
 2430 # Switch Bt878/879 cards into Intel 430FX chipset compatibility mode.
 2431 #
 2432 # options       BKTR_SIS_VIA_MODE
 2433 # Switch Bt878/879 cards into SIS/VIA chipset compatibility mode which is
 2434 # needed for some old SiS and VIA chipset motherboards.
 2435 # This also allows Bt878/879 chips to work on old OPTi (<1997) chipset
 2436 # motherboards and motherboards with bad or incomplete PCI 2.1 support.
 2437 # As a rough guess, old = before 1998
 2438 #
 2439 # options       BKTR_NEW_MSP34XX_DRIVER
 2440 # Use new, more complete initialization scheme for the msp34* soundchip.
 2441 # Should fix stereo autodetection if the old driver does only output
 2442 # mono sound.
 2443 
 2444 #
 2445 # options       BKTR_USE_FREEBSD_SMBUS
 2446 # Compile with FreeBSD SMBus implementation
 2447 #
 2448 # Brooktree driver has been ported to the new I2C framework. Thus,
 2449 # you'll need to have the following 3 lines in the kernel config.
 2450 #     device smbus
 2451 #     device iicbus
 2452 #     device iicbb
 2453 #     device iicsmb
 2454 # The iic and smb devices are only needed if you want to control other
 2455 # I2C slaves connected to the external connector of some cards.
 2456 #
 2457 device          bktr
 2458  
 2459 #
 2460 # PC Card/PCMCIA and Cardbus
 2461 #
 2462 # cbb: pci/cardbus bridge implementing YENTA interface
 2463 # pccard: pccard slots
 2464 # cardbus: cardbus slots
 2465 device          cbb
 2466 device          pccard
 2467 device          cardbus
 2468 
 2469 #
 2470 # MMC/SD
 2471 #
 2472 # mmc           MMC/SD bus
 2473 # mmcsd         MMC/SD memory card
 2474 # sdhci         Generic PCI SD Host Controller
 2475 #
 2476 device          mmc
 2477 device          mmcsd
 2478 device          sdhci
 2479 
 2480 #
 2481 # SMB bus
 2482 #
 2483 # System Management Bus support is provided by the 'smbus' device.
 2484 # Access to the SMBus device is via the 'smb' device (/dev/smb*),
 2485 # which is a child of the 'smbus' device.
 2486 #
 2487 # Supported devices:
 2488 # smb           standard I/O through /dev/smb*
 2489 #
 2490 # Supported SMB interfaces:
 2491 # iicsmb        I2C to SMB bridge with any iicbus interface
 2492 # bktr          brooktree848 I2C hardware interface
 2493 # intpm         Intel PIIX4 (82371AB, 82443MX) Power Management Unit
 2494 # alpm          Acer Aladdin-IV/V/Pro2 Power Management Unit
 2495 # ichsmb        Intel ICH SMBus controller chips (82801AA, 82801AB, 82801BA)
 2496 # viapm         VIA VT82C586B/596B/686A and VT8233 Power Management Unit
 2497 # amdpm         AMD 756 Power Management Unit
 2498 # amdsmb        AMD 8111 SMBus 2.0 Controller
 2499 # nfpm          NVIDIA nForce Power Management Unit
 2500 # nfsmb         NVIDIA nForce2/3/4 MCP SMBus 2.0 Controller
 2501 #
 2502 device          smbus           # Bus support, required for smb below.
 2503 
 2504 device          intpm
 2505 device          alpm
 2506 device          ichsmb
 2507 device          viapm
 2508 device          amdpm
 2509 device          amdsmb
 2510 device          nfpm
 2511 device          nfsmb
 2512 
 2513 device          smb
 2514 
 2515 #
 2516 # I2C Bus
 2517 #
 2518 # Philips i2c bus support is provided by the `iicbus' device.
 2519 #
 2520 # Supported devices:
 2521 # ic    i2c network interface
 2522 # iic   i2c standard io
 2523 # iicsmb i2c to smb bridge. Allow i2c i/o with smb commands.
 2524 #
 2525 # Supported interfaces:
 2526 # bktr  brooktree848 I2C software interface
 2527 #
 2528 # Other:
 2529 # iicbb generic I2C bit-banging code (needed by lpbb, bktr)
 2530 #
 2531 device          iicbus          # Bus support, required for ic/iic/iicsmb below.
 2532 device          iicbb
 2533 
 2534 device          ic
 2535 device          iic
 2536 device          iicsmb          # smb over i2c bridge
 2537 
 2538 # I2C peripheral devices
 2539 #
 2540 # ds133x        Dallas Semiconductor DS1337, DS1338 and DS1339 RTC
 2541 # ds1672        Dallas Semiconductor DS1672 RTC
 2542 #
 2543 device          ds133x
 2544 device          ds1672
 2545 
 2546 # Parallel-Port Bus
 2547 #
 2548 # Parallel port bus support is provided by the `ppbus' device.
 2549 # Multiple devices may be attached to the parallel port, devices
 2550 # are automatically probed and attached when found.
 2551 #
 2552 # Supported devices:
 2553 # vpo   Iomega Zip Drive
 2554 #       Requires SCSI disk support ('scbus' and 'da'), best
 2555 #       performance is achieved with ports in EPP 1.9 mode.
 2556 # lpt   Parallel Printer
 2557 # plip  Parallel network interface
 2558 # ppi   General-purpose I/O ("Geek Port") + IEEE1284 I/O
 2559 # pps   Pulse per second Timing Interface
 2560 # lpbb  Philips official parallel port I2C bit-banging interface
 2561 # pcfclock Parallel port clock driver.
 2562 #
 2563 # Supported interfaces:
 2564 # ppc   ISA-bus parallel port interfaces.
 2565 #
 2566 
 2567 options         PPC_PROBE_CHIPSET # Enable chipset specific detection
 2568                                   # (see flags in ppc(4))
 2569 options         DEBUG_1284      # IEEE1284 signaling protocol debug
 2570 options         PERIPH_1284     # Makes your computer act as an IEEE1284
 2571                                 # compliant peripheral
 2572 options         DONTPROBE_1284  # Avoid boot detection of PnP parallel devices
 2573 options         VP0_DEBUG       # ZIP/ZIP+ debug
 2574 options         LPT_DEBUG       # Printer driver debug
 2575 options         PPC_DEBUG       # Parallel chipset level debug
 2576 options         PLIP_DEBUG      # Parallel network IP interface debug
 2577 options         PCFCLOCK_VERBOSE         # Verbose pcfclock driver
 2578 options         PCFCLOCK_MAX_RETRIES=5   # Maximum read tries (default 10)
 2579 
 2580 device          ppc
 2581 hint.ppc.0.at="isa"
 2582 hint.ppc.0.irq="7"
 2583 device          ppbus
 2584 device          vpo
 2585 device          lpt
 2586 device          plip
 2587 device          ppi
 2588 device          pps
 2589 device          lpbb
 2590 device          pcfclock
 2591 
 2592 # Kernel BOOTP support
 2593 
 2594 options         BOOTP           # Use BOOTP to obtain IP address/hostname
 2595                                 # Requires NFSCLIENT and NFS_ROOT
 2596 options         BOOTP_NFSROOT   # NFS mount root filesystem using BOOTP info
 2597 options         BOOTP_NFSV3     # Use NFS v3 to NFS mount root
 2598 options         BOOTP_COMPAT    # Workaround for broken bootp daemons.
 2599 options         BOOTP_WIRED_TO=fxp0 # Use interface fxp0 for BOOTP
 2600 options         BOOTP_BLOCKSIZE=8192 # Override NFS block size
 2601 
 2602 #
 2603 # Add software watchdog routines.
 2604 #
 2605 options         SW_WATCHDOG
 2606 
 2607 #
 2608 # Add the software deadlock resolver thread.
 2609 #
 2610 options         DEADLKRES
 2611 
 2612 #
 2613 # Disable swapping of stack pages.  This option removes all
 2614 # code which actually performs swapping, so it's not possible to turn
 2615 # it back on at run-time.
 2616 #
 2617 # This is sometimes usable for systems which don't have any swap space
 2618 # (see also sysctls "vm.defer_swapspace_pageouts" and
 2619 # "vm.disable_swapspace_pageouts")
 2620 #
 2621 #options        NO_SWAPPING
 2622 
 2623 # Set the number of sf_bufs to allocate. sf_bufs are virtual buffers
 2624 # for sendfile(2) that are used to map file VM pages, and normally
 2625 # default to a quantity that is roughly 16*MAXUSERS+512. You would
 2626 # typically want about 4 of these for each simultaneous file send.
 2627 #
 2628 options         NSFBUFS=1024
 2629 
 2630 #
 2631 # Enable extra debugging code for locks.  This stores the filename and
 2632 # line of whatever acquired the lock in the lock itself, and changes a
 2633 # number of function calls to pass around the relevant data.  This is
 2634 # not at all useful unless you are debugging lock code.  Also note
 2635 # that it is likely to break e.g. fstat(1) unless you recompile your
 2636 # userland with -DDEBUG_LOCKS as well.
 2637 #
 2638 options         DEBUG_LOCKS
 2639 
 2640 
 2641 #####################################################################
 2642 # USB support
 2643 # UHCI controller
 2644 device          uhci
 2645 # OHCI controller
 2646 device          ohci
 2647 # EHCI controller
 2648 device          ehci
 2649 # XHCI controller
 2650 device          xhci
 2651 # SL811 Controller
 2652 #device         slhci
 2653 # General USB code (mandatory for USB)
 2654 device          usb
 2655 #
 2656 # USB Double Bulk Pipe devices
 2657 device          udbp
 2658 # USB Fm Radio
 2659 device          ufm
 2660 # Human Interface Device (anything with buttons and dials)
 2661 device          uhid
 2662 # USB keyboard
 2663 device          ukbd
 2664 # USB printer
 2665 device          ulpt
 2666 # USB mass storage driver (Requires scbus and da)
 2667 device          umass
 2668 # USB mass storage driver for device-side mode
 2669 device          usfs
 2670 # USB support for Belkin F5U109 and Magic Control Technology serial adapters
 2671 device          umct
 2672 # USB modem support
 2673 device          umodem
 2674 # USB mouse
 2675 device          ums
 2676 # eGalax USB touch screen
 2677 device          uep
 2678 # Diamond Rio 500 MP3 player
 2679 device          urio
 2680 #
 2681 # USB serial support
 2682 device          ucom
 2683 # USB support for 3G modem cards by Option, Novatel, Huawei and Sierra
 2684 device          u3g
 2685 # USB support for Technologies ARK3116 based serial adapters
 2686 device          uark
 2687 # USB support for Belkin F5U103 and compatible serial adapters
 2688 device          ubsa
 2689 # USB support for serial adapters based on the FT8U100AX and FT8U232AM
 2690 device          uftdi
 2691 # USB support for some Windows CE based serial communication.
 2692 device          uipaq
 2693 # USB support for Prolific PL-2303 serial adapters
 2694 device          uplcom
 2695 # USB support for Silicon Laboratories CP2101/CP2102 based USB serial adapters
 2696 device          uslcom
 2697 # USB Visor and Palm devices
 2698 device          uvisor
 2699 # USB serial support for DDI pocket's PHS
 2700 device          uvscom
 2701 #
 2702 # ADMtek USB ethernet. Supports the LinkSys USB100TX,
 2703 # the Billionton USB100, the Melco LU-ATX, the D-Link DSB-650TX
 2704 # and the SMC 2202USB. Also works with the ADMtek AN986 Pegasus
 2705 # eval board.
 2706 device          aue
 2707 
 2708 # ASIX Electronics AX88172 USB 2.0 ethernet driver. Used in the
 2709 # LinkSys USB200M and various other adapters.
 2710 device          axe
 2711 
 2712 #
 2713 # Devices which communicate using Ethernet over USB, particularly
 2714 # Communication Device Class (CDC) Ethernet specification. Supports
 2715 # Sharp Zaurus PDAs, some DOCSIS cable modems and so on.
 2716 device          cdce
 2717 #
 2718 # CATC USB-EL1201A USB ethernet. Supports the CATC Netmate
 2719 # and Netmate II, and the Belkin F5U111.
 2720 device          cue
 2721 #
 2722 # Kawasaki LSI ethernet. Supports the LinkSys USB10T,
 2723 # Entrega USB-NET-E45, Peracom Ethernet Adapter, the
 2724 # 3Com 3c19250, the ADS Technologies USB-10BT, the ATen UC10T,
 2725 # the Netgear EA101, the D-Link DSB-650, the SMC 2102USB
 2726 # and 2104USB, and the Corega USB-T.
 2727 device          kue
 2728 #
 2729 # RealTek RTL8150 USB to fast ethernet. Supports the Melco LUA-KTX
 2730 # and the GREEN HOUSE GH-USB100B.
 2731 device          rue
 2732 #
 2733 # Davicom DM9601E USB to fast ethernet. Supports the Corega FEther USB-TXC.
 2734 device          udav
 2735 #
 2736 # Moschip MCS7730/MCS7840 USB to fast ethernet. Supports the Sitecom LN030.
 2737 device          mos
 2738 #
 2739 # HSxPA devices from Option N.V
 2740 device          uhso
 2741 
 2742 #
 2743 # Ralink Technology RT2501USB/RT2601USB wireless driver
 2744 device          rum
 2745 # Ralink Technology RT2700U/RT2800U/RT3000U wireless driver
 2746 device          run
 2747 #
 2748 # Atheros AR5523 wireless driver
 2749 device          uath
 2750 #
 2751 # Conexant/Intersil PrismGT wireless driver
 2752 device          upgt
 2753 #
 2754 # Ralink Technology RT2500USB wireless driver
 2755 device          ural
 2756 #
 2757 # Realtek RTL8187B/L wireless driver
 2758 device          urtw
 2759 #
 2760 # ZyDas ZD1211/ZD1211B wireless driver
 2761 device          zyd
 2762 
 2763 # 
 2764 # debugging options for the USB subsystem
 2765 #
 2766 options         USB_DEBUG
 2767 options         U3G_DEBUG
 2768 
 2769 # options for ukbd:
 2770 options         UKBD_DFLT_KEYMAP        # specify the built-in keymap
 2771 makeoptions     UKBD_DFLT_KEYMAP=it.iso
 2772 
 2773 # options for uplcom:
 2774 options         UPLCOM_INTR_INTERVAL=100        # interrupt pipe interval
 2775                                                 # in milliseconds
 2776 
 2777 # options for uvscom:
 2778 options         UVSCOM_DEFAULT_OPKTSIZE=8       # default output packet size
 2779 options         UVSCOM_INTR_INTERVAL=100        # interrupt pipe interval
 2780                                                 # in milliseconds
 2781 
 2782 #####################################################################
 2783 # FireWire support
 2784 
 2785 device          firewire        # FireWire bus code
 2786 device          sbp             # SCSI over Firewire (Requires scbus and da)
 2787 device          sbp_targ        # SBP-2 Target mode  (Requires scbus and targ)
 2788 device          fwe             # Ethernet over FireWire (non-standard!)
 2789 device          fwip            # IP over FireWire (RFC2734 and RFC3146)
 2790 
 2791 #####################################################################
 2792 # dcons support (Dumb Console Device)
 2793 
 2794 device          dcons                   # dumb console driver
 2795 device          dcons_crom              # FireWire attachment
 2796 options         DCONS_BUF_SIZE=16384    # buffer size
 2797 options         DCONS_POLL_HZ=100       # polling rate
 2798 options         DCONS_FORCE_CONSOLE=0   # force to be the primary console
 2799 options         DCONS_FORCE_GDB=1       # force to be the gdb device
 2800 
 2801 #####################################################################
 2802 # crypto subsystem
 2803 #
 2804 # This is a port of the OpenBSD crypto framework.  Include this when
 2805 # configuring IPSEC and when you have a h/w crypto device to accelerate
 2806 # user applications that link to OpenSSL.
 2807 #
 2808 # Drivers are ports from OpenBSD with some simple enhancements that have
 2809 # been fed back to OpenBSD.
 2810 
 2811 device          crypto          # core crypto support
 2812 device          cryptodev       # /dev/crypto for access to h/w
 2813 
 2814 device          rndtest         # FIPS 140-2 entropy tester
 2815 
 2816 device          hifn            # Hifn 7951, 7781, etc.
 2817 options         HIFN_DEBUG      # enable debugging support: hw.hifn.debug
 2818 options         HIFN_RNDTEST    # enable rndtest support
 2819 
 2820 device          ubsec           # Broadcom 5501, 5601, 58xx
 2821 options         UBSEC_DEBUG     # enable debugging support: hw.ubsec.debug
 2822 options         UBSEC_RNDTEST   # enable rndtest support
 2823 
 2824 #####################################################################
 2825 
 2826 
 2827 #
 2828 # Embedded system options:
 2829 #
 2830 # An embedded system might want to run something other than init.
 2831 options         INIT_PATH=/sbin/init:/stand/sysinstall
 2832 
 2833 # Debug options
 2834 options         BUS_DEBUG       # enable newbus debugging
 2835 options         DEBUG_VFS_LOCKS # enable VFS lock debugging
 2836 options         SOCKBUF_DEBUG   # enable sockbuf last record/mb tail checking
 2837 
 2838 #
 2839 # Verbose SYSINIT
 2840 #
 2841 # Make the SYSINIT process performed by mi_startup() verbose.  This is very
 2842 # useful when porting to a new architecture.  If DDB is also enabled, this
 2843 # will print function names instead of addresses.
 2844 options         VERBOSE_SYSINIT
 2845 
 2846 #####################################################################
 2847 # SYSV IPC KERNEL PARAMETERS
 2848 #
 2849 # Maximum number of System V semaphores that can be used on the system at
 2850 # one time.
 2851 options         SEMMNI=11
 2852 
 2853 # Total number of semaphores system wide
 2854 options         SEMMNS=61
 2855 
 2856 # Total number of undo structures in system
 2857 options         SEMMNU=31
 2858 
 2859 # Maximum number of System V semaphores that can be used by a single process
 2860 # at one time.
 2861 options         SEMMSL=61
 2862 
 2863 # Maximum number of operations that can be outstanding on a single System V
 2864 # semaphore at one time.
 2865 options         SEMOPM=101
 2866 
 2867 # Maximum number of undo operations that can be outstanding on a single
 2868 # System V semaphore at one time.
 2869 options         SEMUME=11
 2870 
 2871 # Maximum number of shared memory pages system wide.
 2872 options         SHMALL=1025
 2873 
 2874 # Maximum size, in bytes, of a single System V shared memory region.
 2875 options         SHMMAX=(SHMMAXPGS*PAGE_SIZE+1)
 2876 options         SHMMAXPGS=1025
 2877 
 2878 # Minimum size, in bytes, of a single System V shared memory region.
 2879 options         SHMMIN=2
 2880 
 2881 # Maximum number of shared memory regions that can be used on the system
 2882 # at one time.
 2883 options         SHMMNI=33
 2884 
 2885 # Maximum number of System V shared memory regions that can be attached to
 2886 # a single process at one time.
 2887 options         SHMSEG=9
 2888 
 2889 # Compress user core dumps.
 2890 options         COMPRESS_USER_CORES
 2891 # required to compress file output from kernel for COMPRESS_USER_CORES.
 2892 device          gzio        
 2893 
 2894 # Set the amount of time (in seconds) the system will wait before
 2895 # rebooting automatically when a kernel panic occurs.  If set to (-1),
 2896 # the system will wait indefinitely until a key is pressed on the
 2897 # console.
 2898 options         PANIC_REBOOT_WAIT_TIME=16
 2899 
 2900 # Attempt to bypass the buffer cache and put data directly into the
 2901 # userland buffer for read operation when O_DIRECT flag is set on the
 2902 # file.  Both offset and length of the read operation must be
 2903 # multiples of the physical media sector size.
 2904 #
 2905 options         DIRECTIO
 2906 
 2907 # Specify a lower limit for the number of swap I/O buffers.  They are
 2908 # (among other things) used when bypassing the buffer cache due to
 2909 # DIRECTIO kernel option enabled and O_DIRECT flag set on file.
 2910 #
 2911 options         NSWBUF_MIN=120
 2912 
 2913 #####################################################################
 2914 
 2915 # More undocumented options for linting.
 2916 # Note that documenting these is not considered an affront.
 2917 
 2918 options         CAM_DEBUG_DELAY
 2919 
 2920 # VFS cluster debugging.
 2921 options         CLUSTERDEBUG
 2922 
 2923 options         DEBUG
 2924 
 2925 # Kernel filelock debugging.
 2926 options         LOCKF_DEBUG
 2927 
 2928 # System V compatible message queues
 2929 # Please note that the values provided here are used to test kernel
 2930 # building.  The defaults in the sources provide almost the same numbers.
 2931 # MSGSSZ must be a power of 2 between 8 and 1024.
 2932 options         MSGMNB=2049     # Max number of chars in queue
 2933 options         MSGMNI=41       # Max number of message queue identifiers
 2934 options         MSGSEG=2049     # Max number of message segments
 2935 options         MSGSSZ=16       # Size of a message segment
 2936 options         MSGTQL=41       # Max number of messages in system
 2937 
 2938 options         NBUF=512        # Number of buffer headers
 2939 
 2940 options         SCSI_NCR_DEBUG
 2941 options         SCSI_NCR_MAX_SYNC=10000
 2942 options         SCSI_NCR_MAX_WIDE=1
 2943 options         SCSI_NCR_MYADDR=7
 2944 
 2945 options         SC_DEBUG_LEVEL=5        # Syscons debug level
 2946 options         SC_RENDER_DEBUG # syscons rendering debugging
 2947 
 2948 options         VFS_BIO_DEBUG   # VFS buffer I/O debugging
 2949 
 2950 options         KSTACK_MAX_PAGES=32 # Maximum pages to give the kernel stack
 2951 
 2952 # Adaptec Array Controller driver options
 2953 options         AAC_DEBUG       # Debugging levels:
 2954                                 # 0 - quiet, only emit warnings
 2955                                 # 1 - noisy, emit major function
 2956                                 #     points and things done
 2957                                 # 2 - extremely noisy, emit trace
 2958                                 #     items in loops, etc.
 2959 
 2960 # Resource Accounting
 2961 options         RACCT
 2962 
 2963 # Resource Limits
 2964 options         RCTL
 2965 
 2966 # Yet more undocumented options for linting.
 2967 # BKTR_ALLOC_PAGES has no effect except to cause warnings, and
 2968 # BROOKTREE_ALLOC_PAGES hasn't actually been superseded by it, since the
 2969 # driver still mostly spells this option BROOKTREE_ALLOC_PAGES.
 2970 ##options       BKTR_ALLOC_PAGES=(217*4+1)
 2971 options         BROOKTREE_ALLOC_PAGES=(217*4+1)
 2972 options         MAXFILES=999
 2973 

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