The Design and Implementation of the FreeBSD Operating System, Second Edition
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    1 # $FreeBSD: stable/11/sys/conf/NOTES 325618 2017-11-09 19:52:56Z sbruno $
    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 unbootable kernel.
  131 #
  132 # The defaults are 64K and 128K respectively.
  133 options         DFLTPHYS=(64*1024)
  134 options         MAXPHYS=(128*1024)
  135 
  136 
  137 # This allows you to actually store this configuration file into
  138 # the kernel binary itself. See config(8) for more details.
  139 #
  140 options         INCLUDE_CONFIG_FILE     # Include this file in kernel
  141 
  142 #
  143 # Compile-time defaults for various boot parameters
  144 #
  145 options         BOOTVERBOSE=1
  146 options         BOOTHOWTO=RB_MULTIPLE
  147 
  148 options         GEOM_AES                # Don't use, use GEOM_BDE
  149 options         GEOM_BDE                # Disk encryption.
  150 options         GEOM_BSD                # BSD disklabels
  151 options         GEOM_CACHE              # Disk cache.
  152 options         GEOM_CONCAT             # Disk concatenation.
  153 options         GEOM_ELI                # Disk encryption.
  154 options         GEOM_FOX                # Redundant path mitigation
  155 options         GEOM_GATE               # Userland services.
  156 options         GEOM_JOURNAL            # Journaling.
  157 options         GEOM_LABEL              # Providers labelization.
  158 options         GEOM_LINUX_LVM          # Linux LVM2 volumes
  159 options         GEOM_MAP                # Map based partitioning
  160 options         GEOM_MBR                # DOS/MBR partitioning
  161 options         GEOM_MIRROR             # Disk mirroring.
  162 options         GEOM_MULTIPATH          # Disk multipath
  163 options         GEOM_NOP                # Test class.
  164 options         GEOM_PART_APM           # Apple partitioning
  165 options         GEOM_PART_BSD           # BSD disklabel
  166 options         GEOM_PART_BSD64         # BSD disklabel64
  167 options         GEOM_PART_EBR           # Extended Boot Records
  168 options         GEOM_PART_EBR_COMPAT    # Backward compatible partition names
  169 options         GEOM_PART_GPT           # GPT partitioning
  170 options         GEOM_PART_LDM           # Logical Disk Manager
  171 options         GEOM_PART_MBR           # MBR partitioning
  172 options         GEOM_PART_PC98          # PC-9800 disk partitioning
  173 options         GEOM_PART_VTOC8         # SMI VTOC8 disk label
  174 options         GEOM_PC98               # NEC PC9800 partitioning
  175 options         GEOM_RAID               # Soft RAID functionality.
  176 options         GEOM_RAID3              # RAID3 functionality.
  177 options         GEOM_SHSEC              # Shared secret.
  178 options         GEOM_STRIPE             # Disk striping.
  179 options         GEOM_SUNLABEL           # Sun/Solaris partitioning
  180 options         GEOM_UZIP               # Read-only compressed disks
  181 options         GEOM_VINUM              # Vinum logical volume manager
  182 options         GEOM_VIRSTOR            # Virtual storage.
  183 options         GEOM_VOL                # Volume names from UFS superblock
  184 options         GEOM_ZERO               # Performance testing helper.
  185 
  186 #
  187 # The root device and filesystem type can be compiled in;
  188 # this provides a fallback option if the root device cannot
  189 # be correctly guessed by the bootstrap code, or an override if
  190 # the RB_DFLTROOT flag (-r) is specified when booting the kernel.
  191 #
  192 options         ROOTDEVNAME=\"ufs:da0s2e\"
  193 
  194 
  195 #####################################################################
  196 # Scheduler options:
  197 #
  198 # Specifying one of SCHED_4BSD or SCHED_ULE is mandatory.  These options
  199 # select which scheduler is compiled in.
  200 #
  201 # SCHED_4BSD is the historical, proven, BSD scheduler.  It has a global run
  202 # queue and no CPU affinity which makes it suboptimal for SMP.  It has very
  203 # good interactivity and priority selection.
  204 #
  205 # SCHED_ULE provides significant performance advantages over 4BSD on many
  206 # workloads on SMP machines.  It supports cpu-affinity, per-cpu runqueues
  207 # and scheduler locks.  It also has a stronger notion of interactivity 
  208 # which leads to better responsiveness even on uniprocessor machines.  This
  209 # is the default scheduler.
  210 #
  211 # SCHED_STATS is a debugging option which keeps some stats in the sysctl
  212 # tree at 'kern.sched.stats' and is useful for debugging scheduling decisions.
  213 #
  214 options         SCHED_4BSD
  215 options         SCHED_STATS
  216 #options        SCHED_ULE
  217 
  218 #####################################################################
  219 # SMP OPTIONS:
  220 #
  221 # SMP enables building of a Symmetric MultiProcessor Kernel.
  222 
  223 # Mandatory:
  224 options         SMP                     # Symmetric MultiProcessor Kernel
  225 
  226 # EARLY_AP_STARTUP releases the Application Processors earlier in the
  227 # kernel startup process (before devices are probed) rather than at the
  228 # end.  This is a temporary option for use during the transition from
  229 # late to early AP startup.
  230 options         EARLY_AP_STARTUP
  231 
  232 # MAXCPU defines the maximum number of CPUs that can boot in the system.
  233 # A default value should be already present, for every architecture.
  234 options         MAXCPU=32
  235 
  236 # MAXMEMDOM defines the maximum number of memory domains that can boot in the
  237 # system.  A default value should already be defined by every architecture.
  238 options         MAXMEMDOM=2
  239 
  240 # VM_NUMA_ALLOC enables use of memory domain-aware allocation in the VM
  241 # system.
  242 options         VM_NUMA_ALLOC
  243 
  244 # DEVICE_NUMA enables reporting of domain affinity of I/O devices via
  245 # bus_get_domain(), etc.
  246 options         DEVICE_NUMA
  247 
  248 # ADAPTIVE_MUTEXES changes the behavior of blocking mutexes to spin
  249 # if the thread that currently owns the mutex is executing on another
  250 # CPU.  This behavior is enabled by default, so this option can be used
  251 # to disable it.
  252 options         NO_ADAPTIVE_MUTEXES
  253 
  254 # ADAPTIVE_RWLOCKS changes the behavior of reader/writer locks to spin
  255 # if the thread that currently owns the rwlock is executing on another
  256 # CPU.  This behavior is enabled by default, so this option can be used
  257 # to disable it.
  258 options         NO_ADAPTIVE_RWLOCKS
  259 
  260 # ADAPTIVE_SX changes the behavior of sx locks to spin if the thread that
  261 # currently owns the sx lock is executing on another CPU.
  262 # This behavior is enabled by default, so this option can be used to
  263 # disable it.
  264 options         NO_ADAPTIVE_SX
  265 
  266 # MUTEX_NOINLINE forces mutex operations to call functions to perform each
  267 # operation rather than inlining the simple cases.  This can be used to
  268 # shrink the size of the kernel text segment.  Note that this behavior is
  269 # already implied by the INVARIANT_SUPPORT, INVARIANTS, KTR, LOCK_PROFILING,
  270 # and WITNESS options.
  271 options         MUTEX_NOINLINE
  272 
  273 # RWLOCK_NOINLINE forces rwlock operations to call functions to perform each
  274 # operation rather than inlining the simple cases.  This can be used to
  275 # shrink the size of the kernel text segment.  Note that this behavior is
  276 # already implied by the INVARIANT_SUPPORT, INVARIANTS, KTR, LOCK_PROFILING,
  277 # and WITNESS options.
  278 options         RWLOCK_NOINLINE
  279 
  280 # SX_NOINLINE forces sx lock operations to call functions to perform each
  281 # operation rather than inlining the simple cases.  This can be used to
  282 # shrink the size of the kernel text segment.  Note that this behavior is
  283 # already implied by the INVARIANT_SUPPORT, INVARIANTS, KTR, LOCK_PROFILING,
  284 # and WITNESS options.
  285 options         SX_NOINLINE
  286 
  287 # SMP Debugging Options:
  288 #
  289 # CALLOUT_PROFILING enables rudimentary profiling of the callwheel data
  290 #         structure used as backend in callout(9).
  291 # PREEMPTION allows the threads that are in the kernel to be preempted by
  292 #         higher priority [interrupt] threads.  It helps with interactivity
  293 #         and allows interrupt threads to run sooner rather than waiting.
  294 #         WARNING! Only tested on amd64 and i386.
  295 # FULL_PREEMPTION instructs the kernel to preempt non-realtime kernel
  296 #         threads.  Its sole use is to expose race conditions and other
  297 #         bugs during development.  Enabling this option will reduce
  298 #         performance and increase the frequency of kernel panics by
  299 #         design.  If you aren't sure that you need it then you don't.
  300 #         Relies on the PREEMPTION option.  DON'T TURN THIS ON.
  301 # SLEEPQUEUE_PROFILING enables rudimentary profiling of the hash table
  302 #         used to hold active sleep queues as well as sleep wait message
  303 #         frequency.
  304 # TURNSTILE_PROFILING enables rudimentary profiling of the hash table
  305 #         used to hold active lock queues.
  306 # UMTX_PROFILING enables rudimentary profiling of the hash table used 
  307 #         to hold active lock queues.
  308 # WITNESS enables the witness code which detects deadlocks and cycles
  309 #         during locking operations.
  310 # WITNESS_KDB causes the witness code to drop into the kernel debugger if
  311 #         a lock hierarchy violation occurs or if locks are held when going to
  312 #         sleep.
  313 # WITNESS_SKIPSPIN disables the witness checks on spin mutexes.
  314 options         PREEMPTION
  315 options         FULL_PREEMPTION
  316 options         WITNESS
  317 options         WITNESS_KDB
  318 options         WITNESS_SKIPSPIN
  319 
  320 # LOCK_PROFILING - Profiling locks.  See LOCK_PROFILING(9) for details.
  321 options         LOCK_PROFILING
  322 # Set the number of buffers and the hash size.  The hash size MUST be larger
  323 # than the number of buffers.  Hash size should be prime.
  324 options         MPROF_BUFFERS="1536"
  325 options         MPROF_HASH_SIZE="1543"
  326 
  327 # Profiling for the callout(9) backend.
  328 options         CALLOUT_PROFILING
  329 
  330 # Profiling for internal hash tables.
  331 options         SLEEPQUEUE_PROFILING
  332 options         TURNSTILE_PROFILING
  333 options         UMTX_PROFILING
  334 
  335 
  336 #####################################################################
  337 # COMPATIBILITY OPTIONS
  338 
  339 #
  340 # Implement system calls compatible with 4.3BSD and older versions of
  341 # FreeBSD.  You probably do NOT want to remove this as much current code
  342 # still relies on the 4.3 emulation.  Note that some architectures that
  343 # are supported by FreeBSD do not include support for certain important
  344 # aspects of this compatibility option, namely those related to the
  345 # signal delivery mechanism.
  346 #
  347 options         COMPAT_43
  348 
  349 # Old tty interface.
  350 options         COMPAT_43TTY
  351 
  352 # Note that as a general rule, COMPAT_FREEBSD<n> depends on
  353 # COMPAT_FREEBSD<n+1>, COMPAT_FREEBSD<n+2>, etc.
  354 
  355 # Enable FreeBSD4 compatibility syscalls
  356 options         COMPAT_FREEBSD4
  357 
  358 # Enable FreeBSD5 compatibility syscalls
  359 options         COMPAT_FREEBSD5
  360 
  361 # Enable FreeBSD6 compatibility syscalls
  362 options         COMPAT_FREEBSD6
  363 
  364 # Enable FreeBSD7 compatibility syscalls
  365 options         COMPAT_FREEBSD7
  366 
  367 # Enable FreeBSD9 compatibility syscalls
  368 options         COMPAT_FREEBSD9
  369 
  370 # Enable FreeBSD10 compatibility syscalls
  371 options         COMPAT_FREEBSD10
  372 
  373 # Enable Linux Kernel Programming Interface
  374 options         COMPAT_LINUXKPI
  375 
  376 #
  377 # These three options provide support for System V Interface
  378 # Definition-style interprocess communication, in the form of shared
  379 # memory, semaphores, and message queues, respectively.
  380 #
  381 options         SYSVSHM
  382 options         SYSVSEM
  383 options         SYSVMSG
  384 
  385 
  386 #####################################################################
  387 # DEBUGGING OPTIONS
  388 
  389 #
  390 # Compile with kernel debugger related code.
  391 #
  392 options         KDB
  393 
  394 #
  395 # Print a stack trace of the current thread on the console for a panic.
  396 #
  397 options         KDB_TRACE
  398 
  399 #
  400 # Don't enter the debugger for a panic. Intended for unattended operation
  401 # where you may want to enter the debugger from the console, but still want
  402 # the machine to recover from a panic.
  403 #
  404 options         KDB_UNATTENDED
  405 
  406 #
  407 # Enable the ddb debugger backend.
  408 #
  409 options         DDB
  410 
  411 #
  412 # Print the numerical value of symbols in addition to the symbolic
  413 # representation.
  414 #
  415 options         DDB_NUMSYM
  416 
  417 #
  418 # Enable the remote gdb debugger backend.
  419 #
  420 options         GDB
  421 
  422 #
  423 # SYSCTL_DEBUG enables a 'sysctl' debug tree that can be used to dump the
  424 # contents of the registered sysctl nodes on the console.  It is disabled by
  425 # default because it generates excessively verbose console output that can
  426 # interfere with serial console operation.
  427 #
  428 options         SYSCTL_DEBUG
  429 
  430 #
  431 # Enable textdump by default, this disables kernel core dumps.
  432 #
  433 options         TEXTDUMP_PREFERRED
  434 
  435 #
  436 # Enable extra debug messages while performing textdumps.
  437 #
  438 options         TEXTDUMP_VERBOSE
  439 
  440 #
  441 # NO_SYSCTL_DESCR omits the sysctl node descriptions to save space in the
  442 # resulting kernel.
  443 options         NO_SYSCTL_DESCR
  444 
  445 #
  446 # MALLOC_DEBUG_MAXZONES enables multiple uma zones for malloc(9)
  447 # allocations that are smaller than a page.  The purpose is to isolate
  448 # different malloc types into hash classes, so that any buffer
  449 # overruns or use-after-free will usually only affect memory from
  450 # malloc types in that hash class.  This is purely a debugging tool;
  451 # by varying the hash function and tracking which hash class was
  452 # corrupted, the intersection of the hash classes from each instance
  453 # will point to a single malloc type that is being misused.  At this
  454 # point inspection or memguard(9) can be used to catch the offending
  455 # code.
  456 #
  457 options         MALLOC_DEBUG_MAXZONES=8
  458 
  459 #
  460 # DEBUG_MEMGUARD builds and enables memguard(9), a replacement allocator
  461 # for the kernel used to detect modify-after-free scenarios.  See the
  462 # memguard(9) man page for more information on usage.
  463 #
  464 options         DEBUG_MEMGUARD
  465 
  466 #
  467 # DEBUG_REDZONE enables buffer underflows and buffer overflows detection for
  468 # malloc(9).
  469 #
  470 options         DEBUG_REDZONE
  471 
  472 #
  473 # EARLY_PRINTF enables support for calling a special printf (eprintf)
  474 # very early in the kernel (before cn_init() has been called).  This
  475 # should only be used for debugging purposes early in boot.  Normally,
  476 # it is not defined.  It is commented out here because this feature
  477 # isn't generally available. And the required eputc() isn't defined.
  478 #
  479 #options        EARLY_PRINTF
  480 
  481 #
  482 # KTRACE enables the system-call tracing facility ktrace(2).  To be more
  483 # SMP-friendly, KTRACE uses a worker thread to process most trace events
  484 # asynchronously to the thread generating the event.  This requires a
  485 # pre-allocated store of objects representing trace events.  The
  486 # KTRACE_REQUEST_POOL option specifies the initial size of this store.
  487 # The size of the pool can be adjusted both at boottime and runtime via
  488 # the kern.ktrace_request_pool tunable and sysctl.
  489 #
  490 options         KTRACE                  #kernel tracing
  491 options         KTRACE_REQUEST_POOL=101
  492 
  493 #
  494 # KTR is a kernel tracing facility imported from BSD/OS.  It is
  495 # enabled with the KTR option.  KTR_ENTRIES defines the number of
  496 # entries in the circular trace buffer; it may be an arbitrary number.
  497 # KTR_BOOT_ENTRIES defines the number of entries during the early boot,
  498 # before malloc(9) is functional.
  499 # KTR_COMPILE defines the mask of events to compile into the kernel as
  500 # defined by the KTR_* constants in <sys/ktr.h>.  KTR_MASK defines the
  501 # initial value of the ktr_mask variable which determines at runtime
  502 # what events to trace.  KTR_CPUMASK determines which CPU's log
  503 # events, with bit X corresponding to CPU X.  The layout of the string
  504 # passed as KTR_CPUMASK must match a series of bitmasks each of them
  505 # separated by the "," character (ie:
  506 # KTR_CPUMASK=0xAF,0xFFFFFFFFFFFFFFFF).  KTR_VERBOSE enables
  507 # dumping of KTR events to the console by default.  This functionality
  508 # can be toggled via the debug.ktr_verbose sysctl and defaults to off
  509 # if KTR_VERBOSE is not defined.  See ktr(4) and ktrdump(8) for details.
  510 #
  511 options         KTR
  512 options         KTR_BOOT_ENTRIES=1024
  513 options         KTR_ENTRIES=(128*1024)
  514 options         KTR_COMPILE=(KTR_ALL)
  515 options         KTR_MASK=KTR_INTR
  516 options         KTR_CPUMASK=0x3
  517 options         KTR_VERBOSE
  518 
  519 #
  520 # ALQ(9) is a facility for the asynchronous queuing of records from the kernel
  521 # to a vnode, and is employed by services such as ktr(4) to produce trace
  522 # files based on a kernel event stream.  Records are written asynchronously
  523 # in a worker thread.
  524 #
  525 options         ALQ
  526 options         KTR_ALQ
  527 
  528 #
  529 # The INVARIANTS option is used in a number of source files to enable
  530 # extra sanity checking of internal structures.  This support is not
  531 # enabled by default because of the extra time it would take to check
  532 # for these conditions, which can only occur as a result of
  533 # programming errors.
  534 #
  535 options         INVARIANTS
  536 
  537 #
  538 # The INVARIANT_SUPPORT option makes us compile in support for
  539 # verifying some of the internal structures.  It is a prerequisite for
  540 # 'INVARIANTS', as enabling 'INVARIANTS' will make these functions be
  541 # called.  The intent is that you can set 'INVARIANTS' for single
  542 # source files (by changing the source file or specifying it on the
  543 # command line) if you have 'INVARIANT_SUPPORT' enabled.  Also, if you
  544 # wish to build a kernel module with 'INVARIANTS', then adding
  545 # 'INVARIANT_SUPPORT' to your kernel will provide all the necessary
  546 # infrastructure without the added overhead.
  547 #
  548 options         INVARIANT_SUPPORT
  549 
  550 #
  551 # The DIAGNOSTIC option is used to enable extra debugging information
  552 # from some parts of the kernel.  As this makes everything more noisy,
  553 # it is disabled by default.
  554 #
  555 options         DIAGNOSTIC
  556 
  557 #
  558 # REGRESSION causes optional kernel interfaces necessary only for regression
  559 # testing to be enabled.  These interfaces may constitute security risks
  560 # when enabled, as they permit processes to easily modify aspects of the
  561 # run-time environment to reproduce unlikely or unusual (possibly normally
  562 # impossible) scenarios.
  563 #
  564 options         REGRESSION
  565 
  566 #
  567 # This option lets some drivers co-exist that can't co-exist in a running
  568 # system.  This is used to be able to compile all kernel code in one go for
  569 # quality assurance purposes (like this file, which the option takes it name
  570 # from.)
  571 #
  572 options         COMPILING_LINT
  573 
  574 #
  575 # STACK enables the stack(9) facility, allowing the capture of kernel stack
  576 # for the purpose of procinfo(1), etc.  stack(9) will also be compiled in
  577 # automatically if DDB(4) is compiled into the kernel.
  578 #
  579 options         STACK
  580 
  581 
  582 #####################################################################
  583 # PERFORMANCE MONITORING OPTIONS
  584 
  585 #
  586 # The hwpmc driver that allows the use of in-CPU performance monitoring
  587 # counters for performance monitoring.  The base kernel needs to be configured
  588 # with the 'options' line, while the hwpmc device can be either compiled
  589 # in or loaded as a loadable kernel module.
  590 #
  591 # Additional configuration options may be required on specific architectures,
  592 # please see hwpmc(4).
  593 
  594 device          hwpmc                   # Driver (also a loadable module)
  595 options         HWPMC_DEBUG
  596 options         HWPMC_HOOKS             # Other necessary kernel hooks
  597 
  598 
  599 #####################################################################
  600 # NETWORKING OPTIONS
  601 
  602 #
  603 # Protocol families
  604 #
  605 options         INET                    #Internet communications protocols
  606 options         INET6                   #IPv6 communications protocols
  607 
  608 options         ROUTETABLES=2           # allocated fibs up to 65536. default is 1.
  609                                         # but that would be a bad idea as they are large.
  610 
  611 options         TCP_OFFLOAD             # TCP offload support.
  612 
  613 # In order to enable IPSEC you MUST also add device crypto to 
  614 # your kernel configuration
  615 options         IPSEC                   #IP security (requires device crypto)
  616 
  617 # Option IPSEC_SUPPORT does not enable IPsec, but makes it possible to 
  618 # load it as a kernel module. You still MUST add device crypto to your kernel
  619 # configuration.
  620 options         IPSEC_SUPPORT
  621 #options        IPSEC_DEBUG             #debug for IP security
  622 
  623 #
  624 # SMB/CIFS requester
  625 # NETSMB enables support for SMB protocol, it requires LIBMCHAIN and LIBICONV
  626 # options.
  627 options         NETSMB                  #SMB/CIFS requester
  628 
  629 # mchain library. It can be either loaded as KLD or compiled into kernel
  630 options         LIBMCHAIN
  631 
  632 # libalias library, performing NAT
  633 options         LIBALIAS
  634 
  635 # flowtable cache
  636 options         FLOWTABLE
  637 
  638 #
  639 # SCTP is a NEW transport protocol defined by
  640 # RFC2960 updated by RFC3309 and RFC3758.. and
  641 # soon to have a new base RFC and many many more
  642 # extensions. This release supports all the extensions
  643 # including many drafts (most about to become RFC's).
  644 # It is the reference implementation of SCTP
  645 # and is quite well tested.
  646 #
  647 # Note YOU MUST have both INET and INET6 defined.
  648 # You don't have to enable V6, but SCTP is 
  649 # dual stacked and so far we have not torn apart
  650 # the V6 and V4.. since an association can span
  651 # both a V6 and V4 address at the SAME time :-)
  652 #
  653 options         SCTP
  654 # There are bunches of options:
  655 # this one turns on all sorts of
  656 # nastily printing that you can
  657 # do. It's all controlled by a
  658 # bit mask (settable by socket opt and
  659 # by sysctl). Including will not cause
  660 # logging until you set the bits.. but it
  661 # can be quite verbose.. so without this
  662 # option we don't do any of the tests for
  663 # bits and prints.. which makes the code run
  664 # faster.. if you are not debugging don't use.
  665 options         SCTP_DEBUG
  666 #
  667 # This option turns off the CRC32c checksum. Basically,
  668 # you will not be able to talk to anyone else who
  669 # has not done this. Its more for experimentation to
  670 # see how much CPU the CRC32c really takes. Most new
  671 # cards for TCP support checksum offload.. so this 
  672 # option gives you a "view" into what SCTP would be
  673 # like with such an offload (which only exists in
  674 # high in iSCSI boards so far). With the new
  675 # splitting 8's algorithm its not as bad as it used
  676 # to be.. but it does speed things up try only
  677 # for in a captured lab environment :-)
  678 options         SCTP_WITH_NO_CSUM
  679 #
  680 
  681 #
  682 # All that options after that turn on specific types of
  683 # logging. You can monitor CWND growth, flight size
  684 # and all sorts of things. Go look at the code and
  685 # see. I have used this to produce interesting 
  686 # charts and graphs as well :->
  687 # 
  688 # I have not yet committed the tools to get and print
  689 # the logs, I will do that eventually .. before then
  690 # if you want them send me an email rrs@freebsd.org
  691 # You basically must have ktr(4) enabled for these
  692 # and you then set the sysctl to turn on/off various
  693 # logging bits. Use ktrdump(8) to pull the log and run
  694 # it through a display program.. and graphs and other
  695 # things too.
  696 #
  697 options         SCTP_LOCK_LOGGING
  698 options         SCTP_MBUF_LOGGING
  699 options         SCTP_MBCNT_LOGGING
  700 options         SCTP_PACKET_LOGGING
  701 options         SCTP_LTRACE_CHUNKS
  702 options         SCTP_LTRACE_ERRORS
  703 
  704 
  705 # altq(9). Enable the base part of the hooks with the ALTQ option.
  706 # Individual disciplines must be built into the base system and can not be
  707 # loaded as modules at this point. ALTQ requires a stable TSC so if yours is
  708 # broken or changes with CPU throttling then you must also have the ALTQ_NOPCC
  709 # option.
  710 options         ALTQ
  711 options         ALTQ_CBQ        # Class Based Queueing
  712 options         ALTQ_RED        # Random Early Detection
  713 options         ALTQ_RIO        # RED In/Out
  714 options         ALTQ_CODEL      # CoDel Active Queueing
  715 options         ALTQ_HFSC       # Hierarchical Packet Scheduler
  716 options         ALTQ_FAIRQ      # Fair Packet Scheduler
  717 options         ALTQ_CDNR       # Traffic conditioner
  718 options         ALTQ_PRIQ       # Priority Queueing
  719 options         ALTQ_NOPCC      # Required if the TSC is unusable
  720 options         ALTQ_DEBUG
  721 
  722 # netgraph(4). Enable the base netgraph code with the NETGRAPH option.
  723 # Individual node types can be enabled with the corresponding option
  724 # listed below; however, this is not strictly necessary as netgraph
  725 # will automatically load the corresponding KLD module if the node type
  726 # is not already compiled into the kernel. Each type below has a
  727 # corresponding man page, e.g., ng_async(8).
  728 options         NETGRAPH                # netgraph(4) system
  729 options         NETGRAPH_DEBUG          # enable extra debugging, this
  730                                         # affects netgraph(4) and nodes
  731 # Node types
  732 options         NETGRAPH_ASYNC
  733 options         NETGRAPH_ATMLLC
  734 options         NETGRAPH_ATM_ATMPIF
  735 options         NETGRAPH_BLUETOOTH              # ng_bluetooth(4)
  736 options         NETGRAPH_BLUETOOTH_BT3C         # ng_bt3c(4)
  737 options         NETGRAPH_BLUETOOTH_HCI          # ng_hci(4)
  738 options         NETGRAPH_BLUETOOTH_L2CAP        # ng_l2cap(4)
  739 options         NETGRAPH_BLUETOOTH_SOCKET       # ng_btsocket(4)
  740 options         NETGRAPH_BLUETOOTH_UBT          # ng_ubt(4)
  741 options         NETGRAPH_BLUETOOTH_UBTBCMFW     # ubtbcmfw(4)
  742 options         NETGRAPH_BPF
  743 options         NETGRAPH_BRIDGE
  744 options         NETGRAPH_CAR
  745 options         NETGRAPH_CISCO
  746 options         NETGRAPH_DEFLATE
  747 options         NETGRAPH_DEVICE
  748 options         NETGRAPH_ECHO
  749 options         NETGRAPH_EIFACE
  750 options         NETGRAPH_ETHER
  751 options         NETGRAPH_FRAME_RELAY
  752 options         NETGRAPH_GIF
  753 options         NETGRAPH_GIF_DEMUX
  754 options         NETGRAPH_HOLE
  755 options         NETGRAPH_IFACE
  756 options         NETGRAPH_IP_INPUT
  757 options         NETGRAPH_IPFW
  758 options         NETGRAPH_KSOCKET
  759 options         NETGRAPH_L2TP
  760 options         NETGRAPH_LMI
  761 options         NETGRAPH_MPPC_COMPRESSION
  762 options         NETGRAPH_MPPC_ENCRYPTION
  763 options         NETGRAPH_NETFLOW
  764 options         NETGRAPH_NAT
  765 options         NETGRAPH_ONE2MANY
  766 options         NETGRAPH_PATCH
  767 options         NETGRAPH_PIPE
  768 options         NETGRAPH_PPP
  769 options         NETGRAPH_PPPOE
  770 options         NETGRAPH_PPTPGRE
  771 options         NETGRAPH_PRED1
  772 options         NETGRAPH_RFC1490
  773 options         NETGRAPH_SOCKET
  774 options         NETGRAPH_SPLIT
  775 options         NETGRAPH_SPPP
  776 options         NETGRAPH_TAG
  777 options         NETGRAPH_TCPMSS
  778 options         NETGRAPH_TEE
  779 options         NETGRAPH_UI
  780 options         NETGRAPH_VJC
  781 options         NETGRAPH_VLAN
  782 
  783 # NgATM - Netgraph ATM
  784 options         NGATM_ATM
  785 options         NGATM_ATMBASE
  786 options         NGATM_SSCOP
  787 options         NGATM_SSCFU
  788 options         NGATM_UNI
  789 options         NGATM_CCATM
  790 
  791 device          mn      # Munich32x/Falc54 Nx64kbit/sec cards.
  792 
  793 # Network stack virtualization.
  794 #options        VIMAGE
  795 #options        VNET_DEBUG      # debug for VIMAGE
  796 
  797 #
  798 # Network interfaces:
  799 #  The `loop' device is MANDATORY when networking is enabled.
  800 device          loop
  801 
  802 #  The `ether' device provides generic code to handle
  803 #  Ethernets; it is MANDATORY when an Ethernet device driver is
  804 #  configured or token-ring is enabled.
  805 device          ether
  806 
  807 #  The `vlan' device implements the VLAN tagging of Ethernet frames
  808 #  according to IEEE 802.1Q.
  809 device          vlan
  810 
  811 # The `vxlan' device implements the VXLAN encapsulation of Ethernet
  812 # frames in UDP packets according to RFC7348.
  813 device          vxlan
  814 
  815 #  The `wlan' device provides generic code to support 802.11
  816 #  drivers, including host AP mode; it is MANDATORY for the wi,
  817 #  and ath drivers and will eventually be required by all 802.11 drivers.
  818 device          wlan
  819 options         IEEE80211_DEBUG         #enable debugging msgs
  820 options         IEEE80211_AMPDU_AGE     #age frames in AMPDU reorder q's
  821 options         IEEE80211_SUPPORT_MESH  #enable 802.11s D3.0 support
  822 options         IEEE80211_SUPPORT_TDMA  #enable TDMA support
  823 
  824 #  The `wlan_wep', `wlan_tkip', and `wlan_ccmp' devices provide
  825 #  support for WEP, TKIP, and AES-CCMP crypto protocols optionally
  826 #  used with 802.11 devices that depend on the `wlan' module.
  827 device          wlan_wep
  828 device          wlan_ccmp
  829 device          wlan_tkip
  830 
  831 #  The `wlan_xauth' device provides support for external (i.e. user-mode)
  832 #  authenticators for use with 802.11 drivers that use the `wlan'
  833 #  module and support 802.1x and/or WPA security protocols.
  834 device          wlan_xauth
  835 
  836 #  The `wlan_acl' device provides a MAC-based access control mechanism
  837 #  for use with 802.11 drivers operating in ap mode and using the
  838 #  `wlan' module.
  839 #  The 'wlan_amrr' device provides AMRR transmit rate control algorithm
  840 device          wlan_acl
  841 device          wlan_amrr
  842 
  843 # Generic TokenRing
  844 device          token
  845 
  846 #  The `fddi' device provides generic code to support FDDI.
  847 device          fddi
  848 
  849 #  The `arcnet' device provides generic code to support Arcnet.
  850 device          arcnet
  851 
  852 #  The `sppp' device serves a similar role for certain types
  853 #  of synchronous PPP links (like `cx', `ar').
  854 device          sppp
  855 
  856 #  The `bpf' device enables the Berkeley Packet Filter.  Be
  857 #  aware of the legal and administrative consequences of enabling this
  858 #  option.  DHCP requires bpf.
  859 device          bpf
  860 
  861 #  The `netmap' device implements memory-mapped access to network
  862 #  devices from userspace, enabling wire-speed packet capture and
  863 #  generation even at 10Gbit/s. Requires support in the device
  864 #  driver. Supported drivers are ixgbe, e1000, re.
  865 device          netmap
  866 
  867 #  The `disc' device implements a minimal network interface,
  868 #  which throws away all packets sent and never receives any.  It is
  869 #  included for testing and benchmarking purposes.
  870 device          disc
  871 
  872 # The `epair' device implements a virtual back-to-back connected Ethernet
  873 # like interface pair.
  874 device          epair
  875 
  876 #  The `edsc' device implements a minimal Ethernet interface,
  877 #  which discards all packets sent and receives none.
  878 device          edsc
  879 
  880 #  The `tap' device is a pty-like virtual Ethernet interface
  881 device          tap
  882 
  883 #  The `tun' device implements (user-)ppp and nos-tun(8)
  884 device          tun
  885 
  886 #  The `gif' device implements IPv6 over IP4 tunneling,
  887 #  IPv4 over IPv6 tunneling, IPv4 over IPv4 tunneling and
  888 #  IPv6 over IPv6 tunneling.
  889 #  The `gre' device implements GRE (Generic Routing Encapsulation) tunneling,
  890 #  as specified in the RFC 2784 and RFC 2890.
  891 #  The `me' device implements Minimal Encapsulation within IPv4 as
  892 #  specified in the RFC 2004.
  893 #  The XBONEHACK option allows the same pair of addresses to be configured on
  894 #  multiple gif interfaces.
  895 device          gif
  896 device          gre
  897 device          me
  898 options         XBONEHACK
  899 
  900 #  The `stf' device implements 6to4 encapsulation.
  901 device          stf
  902 
  903 # The pf packet filter consists of three devices:
  904 #  The `pf' device provides /dev/pf and the firewall code itself.
  905 #  The `pflog' device provides the pflog0 interface which logs packets.
  906 #  The `pfsync' device provides the pfsync0 interface used for
  907 #   synchronization of firewall state tables (over the net).
  908 device          pf
  909 device          pflog
  910 device          pfsync
  911 
  912 # Bridge interface.
  913 device          if_bridge
  914 
  915 # Common Address Redundancy Protocol. See carp(4) for more details.
  916 device          carp
  917 
  918 # IPsec interface.
  919 device          enc
  920 
  921 # Link aggregation interface.
  922 device          lagg
  923 
  924 #
  925 # Internet family options:
  926 #
  927 # MROUTING enables the kernel multicast packet forwarder, which works
  928 # with mrouted and XORP.
  929 #
  930 # IPFIREWALL enables support for IP firewall construction, in
  931 # conjunction with the `ipfw' program.  IPFIREWALL_VERBOSE sends
  932 # logged packets to the system logger.  IPFIREWALL_VERBOSE_LIMIT
  933 # limits the number of times a matching entry can be logged.
  934 #
  935 # WARNING:  IPFIREWALL defaults to a policy of "deny ip from any to any"
  936 # and if you do not add other rules during startup to allow access,
  937 # YOU WILL LOCK YOURSELF OUT.  It is suggested that you set firewall_type=open
  938 # in /etc/rc.conf when first enabling this feature, then refining the
  939 # firewall rules in /etc/rc.firewall after you've tested that the new kernel
  940 # feature works properly.
  941 #
  942 # IPFIREWALL_DEFAULT_TO_ACCEPT causes the default rule (at boot) to
  943 # allow everything.  Use with care, if a cracker can crash your
  944 # firewall machine, they can get to your protected machines.  However,
  945 # if you are using it as an as-needed filter for specific problems as
  946 # they arise, then this may be for you.  Changing the default to 'allow'
  947 # means that you won't get stuck if the kernel and /sbin/ipfw binary get
  948 # out of sync.
  949 #
  950 # IPDIVERT enables the divert IP sockets, used by ``ipfw divert''.  It
  951 # depends on IPFIREWALL if compiled into the kernel.
  952 #
  953 # IPFIREWALL_NAT adds support for in kernel nat in ipfw, and it requires
  954 # LIBALIAS.
  955 #
  956 # IPFIREWALL_NAT64 adds support for in kernel NAT64 in ipfw.
  957 #
  958 # IPFIREWALL_NPTV6 adds support for in kernel NPTv6 in ipfw.
  959 #
  960 # IPFIREWALL_PMOD adds support for protocols modification module. Currently
  961 # it supports only TCP MSS modification.
  962 #
  963 # IPSTEALTH enables code to support stealth forwarding (i.e., forwarding
  964 # packets without touching the TTL).  This can be useful to hide firewalls
  965 # from traceroute and similar tools.
  966 #
  967 # PF_DEFAULT_TO_DROP causes the default pf(4) rule to deny everything.
  968 #
  969 # TCPDEBUG enables code which keeps traces of the TCP state machine
  970 # for sockets with the SO_DEBUG option set, which can then be examined
  971 # using the trpt(8) utility.
  972 #
  973 # TCPPCAP enables code which keeps the last n packets sent and received
  974 # on a TCP socket.
  975 #
  976 # RADIX_MPATH provides support for equal-cost multi-path routing.
  977 #
  978 options         MROUTING                # Multicast routing
  979 options         IPFIREWALL              #firewall
  980 options         IPFIREWALL_VERBOSE      #enable logging to syslogd(8)
  981 options         IPFIREWALL_VERBOSE_LIMIT=100    #limit verbosity
  982 options         IPFIREWALL_DEFAULT_TO_ACCEPT    #allow everything by default
  983 options         IPFIREWALL_NAT          #ipfw kernel nat support
  984 options         IPFIREWALL_NAT64        #ipfw kernel NAT64 support
  985 options         IPFIREWALL_NPTV6        #ipfw kernel IPv6 NPT support
  986 options         IPDIVERT                #divert sockets
  987 options         IPFILTER                #ipfilter support
  988 options         IPFILTER_LOG            #ipfilter logging
  989 options         IPFILTER_LOOKUP         #ipfilter pools
  990 options         IPFILTER_DEFAULT_BLOCK  #block all packets by default
  991 options         IPSTEALTH               #support for stealth forwarding
  992 options         PF_DEFAULT_TO_DROP      #drop everything by default
  993 options         TCPDEBUG
  994 options         TCPPCAP
  995 options         RADIX_MPATH
  996 
  997 # The MBUF_STRESS_TEST option enables options which create
  998 # various random failures / extreme cases related to mbuf
  999 # functions.  See mbuf(9) for a list of available test cases.
 1000 # MBUF_PROFILING enables code to profile the mbuf chains
 1001 # exiting the system (via participating interfaces) and
 1002 # return a logarithmic histogram of monitored parameters
 1003 # (e.g. packet size, wasted space, number of mbufs in chain).
 1004 options         MBUF_STRESS_TEST
 1005 options         MBUF_PROFILING
 1006 
 1007 # Statically link in accept filters
 1008 options         ACCEPT_FILTER_DATA
 1009 options         ACCEPT_FILTER_DNS
 1010 options         ACCEPT_FILTER_HTTP
 1011 
 1012 # TCP_SIGNATURE adds support for RFC 2385 (TCP-MD5) digests. These are
 1013 # carried in TCP option 19. This option is commonly used to protect
 1014 # TCP sessions (e.g. BGP) where IPSEC is not available nor desirable.
 1015 # This is enabled on a per-socket basis using the TCP_MD5SIG socket option.
 1016 # This requires the use of 'device crypto' and either 'options IPSEC' or
 1017 # 'options IPSEC_SUPPORT'.
 1018 options         TCP_SIGNATURE           #include support for RFC 2385
 1019 
 1020 # DUMMYNET enables the "dummynet" bandwidth limiter.  You need IPFIREWALL
 1021 # as well.  See dummynet(4) and ipfw(8) for more info.  When you run
 1022 # DUMMYNET it is advisable to also have at least "options HZ=1000" to achieve
 1023 # a smooth scheduling of the traffic.
 1024 options         DUMMYNET
 1025 
 1026 #####################################################################
 1027 # FILESYSTEM OPTIONS
 1028 
 1029 #
 1030 # Only the root filesystem needs to be statically compiled or preloaded
 1031 # as module; everything else will be automatically loaded at mount
 1032 # time.  Some people still prefer to statically compile other
 1033 # filesystems as well.
 1034 #
 1035 # NB: The UNION filesystem was known to be buggy in the past.  It is now
 1036 # being actively maintained, although there are still some issues being
 1037 # resolved.
 1038 #
 1039 
 1040 # One of these is mandatory:
 1041 options         FFS                     #Fast filesystem
 1042 options         NFSCL                   #Network File System client
 1043 
 1044 # The rest are optional:
 1045 options         AUTOFS                  #Automounter filesystem
 1046 options         CD9660                  #ISO 9660 filesystem
 1047 options         FDESCFS                 #File descriptor filesystem
 1048 options         FUSE                    #FUSE support module
 1049 options         MSDOSFS                 #MS DOS File System (FAT, FAT32)
 1050 options         NFSLOCKD                #Network Lock Manager
 1051 options         NFSD                    #Network Filesystem Server
 1052 options         KGSSAPI                 #Kernel GSSAPI implementation
 1053 
 1054 options         NULLFS                  #NULL filesystem
 1055 options         PROCFS                  #Process filesystem (requires PSEUDOFS)
 1056 options         PSEUDOFS                #Pseudo-filesystem framework
 1057 options         PSEUDOFS_TRACE          #Debugging support for PSEUDOFS
 1058 options         SMBFS                   #SMB/CIFS filesystem
 1059 options         TMPFS                   #Efficient memory filesystem
 1060 options         UDF                     #Universal Disk Format
 1061 options         UNIONFS                 #Union filesystem
 1062 # The xFS_ROOT options REQUIRE the associated ``options xFS''
 1063 options         NFS_ROOT                #NFS usable as root device
 1064 
 1065 # Soft updates is a technique for improving filesystem speed and
 1066 # making abrupt shutdown less risky.
 1067 #
 1068 options         SOFTUPDATES
 1069 
 1070 # Extended attributes allow additional data to be associated with files,
 1071 # and is used for ACLs, Capabilities, and MAC labels.
 1072 # See src/sys/ufs/ufs/README.extattr for more information.
 1073 options         UFS_EXTATTR
 1074 options         UFS_EXTATTR_AUTOSTART
 1075 
 1076 # Access Control List support for UFS filesystems.  The current ACL
 1077 # implementation requires extended attribute support, UFS_EXTATTR,
 1078 # for the underlying filesystem.
 1079 # See src/sys/ufs/ufs/README.acls for more information.
 1080 options         UFS_ACL
 1081 
 1082 # Directory hashing improves the speed of operations on very large
 1083 # directories at the expense of some memory.
 1084 options         UFS_DIRHASH
 1085 
 1086 # Gjournal-based UFS journaling support.
 1087 options         UFS_GJOURNAL
 1088 
 1089 # Make space in the kernel for a root filesystem on a md device.
 1090 # Define to the number of kilobytes to reserve for the filesystem.
 1091 # This is now optional.
 1092 # If not defined, the root filesystem passed in as the MFS_IMAGE makeoption
 1093 # will be automatically embedded in the kernel during linking. Its exact size
 1094 # will be consumed within the kernel.
 1095 # If defined, the old way of embedding the filesystem in the kernel will be
 1096 # used. That is to say MD_ROOT_SIZE KB will be allocated in the kernel and
 1097 # later, the filesystem image passed in as the MFS_IMAGE makeoption will be
 1098 # dd'd into the reserved space if it fits.
 1099 options         MD_ROOT_SIZE=10
 1100 
 1101 # Make the md device a potential root device, either with preloaded
 1102 # images of type mfs_root or md_root.
 1103 options         MD_ROOT
 1104 
 1105 # Disk quotas are supported when this option is enabled.
 1106 options         QUOTA                   #enable disk quotas
 1107 
 1108 # If you are running a machine just as a fileserver for PC and MAC
 1109 # users, using SAMBA, you may consider setting this option
 1110 # and keeping all those users' directories on a filesystem that is
 1111 # mounted with the suiddir option. This gives new files the same
 1112 # ownership as the directory (similar to group). It's a security hole
 1113 # if you let these users run programs, so confine it to file-servers
 1114 # (but it'll save you lots of headaches in those cases). Root owned
 1115 # directories are exempt and X bits are cleared. The suid bit must be
 1116 # set on the directory as well; see chmod(1). PC owners can't see/set
 1117 # ownerships so they keep getting their toes trodden on. This saves
 1118 # you all the support calls as the filesystem it's used on will act as
 1119 # they expect: "It's my dir so it must be my file".
 1120 #
 1121 options         SUIDDIR
 1122 
 1123 # NFS options:
 1124 options         NFS_MINATTRTIMO=3       # VREG attrib cache timeout in sec
 1125 options         NFS_MAXATTRTIMO=60
 1126 options         NFS_MINDIRATTRTIMO=30   # VDIR attrib cache timeout in sec
 1127 options         NFS_MAXDIRATTRTIMO=60
 1128 options         NFS_DEBUG               # Enable NFS Debugging
 1129 
 1130 #
 1131 # Add support for the EXT2FS filesystem of Linux fame.  Be a bit
 1132 # careful with this - the ext2fs code has a tendency to lag behind
 1133 # changes and not be exercised very much, so mounting read/write could
 1134 # be dangerous (and even mounting read only could result in panics.)
 1135 #
 1136 options         EXT2FS
 1137 
 1138 # Cryptographically secure random number generator; /dev/random
 1139 device          random
 1140 
 1141 # The system memory devices; /dev/mem, /dev/kmem
 1142 device          mem
 1143 
 1144 # The kernel symbol table device; /dev/ksyms
 1145 device          ksyms
 1146 
 1147 # Optional character code conversion support with LIBICONV.
 1148 # Each option requires their base file system and LIBICONV.
 1149 options         CD9660_ICONV
 1150 options         MSDOSFS_ICONV
 1151 options         UDF_ICONV
 1152 
 1153 
 1154 #####################################################################
 1155 # POSIX P1003.1B
 1156 
 1157 # Real time extensions added in the 1993 POSIX
 1158 # _KPOSIX_PRIORITY_SCHEDULING: Build in _POSIX_PRIORITY_SCHEDULING
 1159 
 1160 options         _KPOSIX_PRIORITY_SCHEDULING
 1161 # p1003_1b_semaphores are very experimental,
 1162 # user should be ready to assist in debugging if problems arise.
 1163 options         P1003_1B_SEMAPHORES
 1164 
 1165 # POSIX message queue
 1166 options         P1003_1B_MQUEUE
 1167 
 1168 #####################################################################
 1169 # SECURITY POLICY PARAMETERS
 1170 
 1171 # Support for BSM audit
 1172 options         AUDIT
 1173 
 1174 # Support for Mandatory Access Control (MAC):
 1175 options         MAC
 1176 options         MAC_BIBA
 1177 options         MAC_BSDEXTENDED
 1178 options         MAC_IFOFF
 1179 options         MAC_LOMAC
 1180 options         MAC_MLS
 1181 options         MAC_NONE
 1182 options         MAC_PARTITION
 1183 options         MAC_PORTACL
 1184 options         MAC_SEEOTHERUIDS
 1185 options         MAC_STUB
 1186 options         MAC_TEST
 1187 
 1188 # Support for Capsicum
 1189 options         CAPABILITIES    # fine-grained rights on file descriptors
 1190 options         CAPABILITY_MODE # sandboxes with no global namespace access
 1191 
 1192 
 1193 #####################################################################
 1194 # CLOCK OPTIONS
 1195 
 1196 # The granularity of operation is controlled by the kernel option HZ whose
 1197 # default value (1000 on most architectures) means a granularity of 1ms
 1198 # (1s/HZ).  Historically, the default was 100, but finer granularity is
 1199 # required for DUMMYNET and other systems on modern hardware.  There are
 1200 # reasonable arguments that HZ should, in fact, be 100 still; consider,
 1201 # that reducing the granularity too much might cause excessive overhead in
 1202 # clock interrupt processing, potentially causing ticks to be missed and thus
 1203 # actually reducing the accuracy of operation.
 1204 
 1205 options         HZ=100
 1206 
 1207 # Enable support for the kernel PLL to use an external PPS signal,
 1208 # under supervision of [x]ntpd(8)
 1209 # More info in ntpd documentation: http://www.eecis.udel.edu/~ntp
 1210 
 1211 options         PPS_SYNC
 1212 
 1213 # Enable support for generic feed-forward clocks in the kernel.
 1214 # The feed-forward clock support is an alternative to the feedback oriented
 1215 # ntpd/system clock approach, and is to be used with a feed-forward
 1216 # synchronization algorithm such as the RADclock:
 1217 # More info here: http://www.synclab.org/radclock
 1218 
 1219 options         FFCLOCK
 1220 
 1221 
 1222 #####################################################################
 1223 # SCSI DEVICES
 1224 
 1225 # SCSI DEVICE CONFIGURATION
 1226 
 1227 # The SCSI subsystem consists of the `base' SCSI code, a number of
 1228 # high-level SCSI device `type' drivers, and the low-level host-adapter
 1229 # device drivers.  The host adapters are listed in the ISA and PCI
 1230 # device configuration sections below.
 1231 #
 1232 # It is possible to wire down your SCSI devices so that a given bus,
 1233 # target, and LUN always come on line as the same device unit.  In
 1234 # earlier versions the unit numbers were assigned in the order that
 1235 # the devices were probed on the SCSI bus.  This means that if you
 1236 # removed a disk drive, you may have had to rewrite your /etc/fstab
 1237 # file, and also that you had to be careful when adding a new disk
 1238 # as it may have been probed earlier and moved your device configuration
 1239 # around.  (See also option GEOM_VOL for a different solution to this
 1240 # problem.)
 1241 
 1242 # This old behavior is maintained as the default behavior.  The unit
 1243 # assignment begins with the first non-wired down unit for a device
 1244 # type.  For example, if you wire a disk as "da3" then the first
 1245 # non-wired disk will be assigned da4.
 1246 
 1247 # The syntax for wiring down devices is:
 1248 
 1249 hint.scbus.0.at="ahc0"
 1250 hint.scbus.1.at="ahc1"
 1251 hint.scbus.1.bus="0"
 1252 hint.scbus.3.at="ahc2"
 1253 hint.scbus.3.bus="0"
 1254 hint.scbus.2.at="ahc2"
 1255 hint.scbus.2.bus="1"
 1256 hint.da.0.at="scbus0"
 1257 hint.da.0.target="0"
 1258 hint.da.0.unit="0"
 1259 hint.da.1.at="scbus3"
 1260 hint.da.1.target="1"
 1261 hint.da.2.at="scbus2"
 1262 hint.da.2.target="3"
 1263 hint.sa.1.at="scbus1"
 1264 hint.sa.1.target="6"
 1265 
 1266 # "units" (SCSI logical unit number) that are not specified are
 1267 # treated as if specified as LUN 0.
 1268 
 1269 # All SCSI devices allocate as many units as are required.
 1270 
 1271 # The ch driver drives SCSI Media Changer ("jukebox") devices.
 1272 #
 1273 # The da driver drives SCSI Direct Access ("disk") and Optical Media
 1274 # ("WORM") devices.
 1275 #
 1276 # The sa driver drives SCSI Sequential Access ("tape") devices.
 1277 #
 1278 # The cd driver drives SCSI Read Only Direct Access ("cd") devices.
 1279 #
 1280 # The ses driver drives SCSI Environment Services ("ses") and
 1281 # SAF-TE ("SCSI Accessible Fault-Tolerant Enclosure") devices.
 1282 #
 1283 # The pt driver drives SCSI Processor devices.
 1284 #
 1285 # The sg driver provides a passthrough API that is compatible with the
 1286 # Linux SG driver.  It will work in conjunction with the COMPAT_LINUX
 1287 # option to run linux SG apps.  It can also stand on its own and provide
 1288 # source level API compatibility for porting apps to FreeBSD.
 1289 #
 1290 # Target Mode support is provided here but also requires that a SIM
 1291 # (SCSI Host Adapter Driver) provide support as well.
 1292 #
 1293 # The targ driver provides target mode support as a Processor type device.
 1294 # It exists to give the minimal context necessary to respond to Inquiry
 1295 # commands. There is a sample user application that shows how the rest
 1296 # of the command support might be done in /usr/share/examples/scsi_target.
 1297 #
 1298 # The targbh driver provides target mode support and exists to respond
 1299 # to incoming commands that do not otherwise have a logical unit assigned
 1300 # to them.
 1301 #
 1302 # The pass driver provides a passthrough API to access the CAM subsystem.
 1303 
 1304 device          scbus           #base SCSI code
 1305 device          ch              #SCSI media changers
 1306 device          da              #SCSI direct access devices (aka disks)
 1307 device          sa              #SCSI tapes
 1308 device          cd              #SCSI CD-ROMs
 1309 device          ses             #Enclosure Services (SES and SAF-TE)
 1310 device          pt              #SCSI processor
 1311 device          targ            #SCSI Target Mode Code
 1312 device          targbh          #SCSI Target Mode Blackhole Device
 1313 device          pass            #CAM passthrough driver
 1314 device          sg              #Linux SCSI passthrough
 1315 device          ctl             #CAM Target Layer
 1316 
 1317 # CAM OPTIONS:
 1318 # debugging options:
 1319 # CAMDEBUG              Compile in all possible debugging.
 1320 # CAM_DEBUG_COMPILE     Debug levels to compile in.
 1321 # CAM_DEBUG_FLAGS       Debug levels to enable on boot.
 1322 # CAM_DEBUG_BUS         Limit debugging to the given bus.
 1323 # CAM_DEBUG_TARGET      Limit debugging to the given target.
 1324 # CAM_DEBUG_LUN         Limit debugging to the given lun.
 1325 # CAM_DEBUG_DELAY       Delay in us after printing each debug line.
 1326 #
 1327 # CAM_MAX_HIGHPOWER: Maximum number of concurrent high power (start unit) cmds
 1328 # SCSI_NO_SENSE_STRINGS: When defined disables sense descriptions
 1329 # SCSI_NO_OP_STRINGS: When defined disables opcode descriptions
 1330 # SCSI_DELAY: The number of MILLISECONDS to freeze the SIM (scsi adapter)
 1331 #             queue after a bus reset, and the number of milliseconds to
 1332 #             freeze the device queue after a bus device reset.  This
 1333 #             can be changed at boot and runtime with the
 1334 #             kern.cam.scsi_delay tunable/sysctl.
 1335 options         CAMDEBUG
 1336 options         CAM_DEBUG_COMPILE=-1
 1337 options         CAM_DEBUG_FLAGS=(CAM_DEBUG_INFO|CAM_DEBUG_PROBE|CAM_DEBUG_PERIPH)
 1338 options         CAM_DEBUG_BUS=-1
 1339 options         CAM_DEBUG_TARGET=-1
 1340 options         CAM_DEBUG_LUN=-1
 1341 options         CAM_DEBUG_DELAY=1
 1342 options         CAM_MAX_HIGHPOWER=4
 1343 options         SCSI_NO_SENSE_STRINGS
 1344 options         SCSI_NO_OP_STRINGS
 1345 options         SCSI_DELAY=5000 # Be pessimistic about Joe SCSI device
 1346 options         CAM_IOSCHED_DYNAMIC
 1347 
 1348 # Options for the CAM CDROM driver:
 1349 # CHANGER_MIN_BUSY_SECONDS: Guaranteed minimum time quantum for a changer LUN
 1350 # CHANGER_MAX_BUSY_SECONDS: Maximum time quantum per changer LUN, only
 1351 #                           enforced if there is I/O waiting for another LUN
 1352 # The compiled in defaults for these variables are 2 and 10 seconds,
 1353 # respectively.
 1354 #
 1355 # These can also be changed on the fly with the following sysctl variables:
 1356 # kern.cam.cd.changer.min_busy_seconds
 1357 # kern.cam.cd.changer.max_busy_seconds
 1358 #
 1359 options         CHANGER_MIN_BUSY_SECONDS=2
 1360 options         CHANGER_MAX_BUSY_SECONDS=10
 1361 
 1362 # Options for the CAM sequential access driver:
 1363 # SA_IO_TIMEOUT: Timeout for read/write/wfm  operations, in minutes
 1364 # SA_SPACE_TIMEOUT: Timeout for space operations, in minutes
 1365 # SA_REWIND_TIMEOUT: Timeout for rewind operations, in minutes
 1366 # SA_ERASE_TIMEOUT: Timeout for erase operations, in minutes
 1367 # SA_1FM_AT_EOD: Default to model which only has a default one filemark at EOT.
 1368 options         SA_IO_TIMEOUT=4
 1369 options         SA_SPACE_TIMEOUT=60
 1370 options         SA_REWIND_TIMEOUT=(2*60)
 1371 options         SA_ERASE_TIMEOUT=(4*60)
 1372 options         SA_1FM_AT_EOD
 1373 
 1374 # Optional timeout for the CAM processor target (pt) device
 1375 # This is specified in seconds.  The default is 60 seconds.
 1376 options         SCSI_PT_DEFAULT_TIMEOUT=60
 1377 
 1378 # Optional enable of doing SES passthrough on other devices (e.g., disks)
 1379 #
 1380 # Normally disabled because a lot of newer SCSI disks report themselves
 1381 # as having SES capabilities, but this can then clot up attempts to build
 1382 # a topology with the SES device that's on the box these drives are in....
 1383 options         SES_ENABLE_PASSTHROUGH
 1384 
 1385 
 1386 #####################################################################
 1387 # MISCELLANEOUS DEVICES AND OPTIONS
 1388 
 1389 device          pty             #BSD-style compatibility pseudo ttys
 1390 device          nmdm            #back-to-back tty devices
 1391 device          md              #Memory/malloc disk
 1392 device          snp             #Snoop device - to look at pty/vty/etc..
 1393 device          ccd             #Concatenated disk driver
 1394 device          firmware        #firmware(9) support
 1395 
 1396 # Kernel side iconv library
 1397 options         LIBICONV
 1398 
 1399 # Size of the kernel message buffer.  Should be N * pagesize.
 1400 options         MSGBUF_SIZE=40960
 1401 
 1402 
 1403 #####################################################################
 1404 # HARDWARE BUS CONFIGURATION
 1405 
 1406 #
 1407 # PCI bus & PCI options:
 1408 #
 1409 device          pci
 1410 options         PCI_HP                  # PCI-Express native HotPlug
 1411 options         PCI_IOV                 # PCI SR-IOV support
 1412 
 1413 
 1414 #####################################################################
 1415 # HARDWARE DEVICE CONFIGURATION
 1416 
 1417 # For ISA the required hints are listed.
 1418 # EISA, MCA, PCI, CardBus, SD/MMC and pccard are self identifying buses, so
 1419 # no hints are needed.
 1420 
 1421 #
 1422 # Mandatory devices:
 1423 #
 1424 
 1425 # These options are valid for other keyboard drivers as well.
 1426 options         KBD_DISABLE_KEYMAP_LOAD # refuse to load a keymap
 1427 options         KBD_INSTALL_CDEV        # install a CDEV entry in /dev
 1428 
 1429 device          kbdmux                  # keyboard multiplexer
 1430 options         KBDMUX_DFLT_KEYMAP      # specify the built-in keymap
 1431 makeoptions     KBDMUX_DFLT_KEYMAP=it.iso
 1432 
 1433 options         FB_DEBUG                # Frame buffer debugging
 1434 
 1435 device          splash                  # Splash screen and screen saver support
 1436 
 1437 # Various screen savers.
 1438 device          blank_saver
 1439 device          daemon_saver
 1440 device          dragon_saver
 1441 device          fade_saver
 1442 device          fire_saver
 1443 device          green_saver
 1444 device          logo_saver
 1445 device          rain_saver
 1446 device          snake_saver
 1447 device          star_saver
 1448 device          warp_saver
 1449 
 1450 # The syscons console driver (SCO color console compatible).
 1451 device          sc
 1452 hint.sc.0.at="isa"
 1453 options         MAXCONS=16              # number of virtual consoles
 1454 options         SC_ALT_MOUSE_IMAGE      # simplified mouse cursor in text mode
 1455 options         SC_DFLT_FONT            # compile font in
 1456 makeoptions     SC_DFLT_FONT=cp850
 1457 options         SC_DISABLE_KDBKEY       # disable `debug' key
 1458 options         SC_DISABLE_REBOOT       # disable reboot key sequence
 1459 options         SC_HISTORY_SIZE=200     # number of history buffer lines
 1460 options         SC_MOUSE_CHAR=0x3       # char code for text mode mouse cursor
 1461 options         SC_PIXEL_MODE           # add support for the raster text mode
 1462 
 1463 # The following options will let you change the default colors of syscons.
 1464 options         SC_NORM_ATTR=(FG_GREEN|BG_BLACK)
 1465 options         SC_NORM_REV_ATTR=(FG_YELLOW|BG_GREEN)
 1466 options         SC_KERNEL_CONS_ATTR=(FG_RED|BG_BLACK)
 1467 options         SC_KERNEL_CONS_REV_ATTR=(FG_BLACK|BG_RED)
 1468 
 1469 # The following options will let you change the default behavior of
 1470 # cut-n-paste feature
 1471 options         SC_CUT_SPACES2TABS      # convert leading spaces into tabs
 1472 options         SC_CUT_SEPCHARS=\"x09\" # set of characters that delimit words
 1473                                         # (default is single space - \"x20\")
 1474 
 1475 # If you have a two button mouse, you may want to add the following option
 1476 # to use the right button of the mouse to paste text.
 1477 options         SC_TWOBUTTON_MOUSE
 1478 
 1479 # You can selectively disable features in syscons.
 1480 options         SC_NO_CUTPASTE
 1481 options         SC_NO_FONT_LOADING
 1482 options         SC_NO_HISTORY
 1483 options         SC_NO_MODE_CHANGE
 1484 options         SC_NO_SYSMOUSE
 1485 options         SC_NO_SUSPEND_VTYSWITCH
 1486 
 1487 # `flags' for sc
 1488 #       0x80    Put the video card in the VESA 800x600 dots, 16 color mode
 1489 #       0x100   Probe for a keyboard device periodically if one is not present
 1490 
 1491 # Enable experimental features of the syscons terminal emulator (teken).
 1492 options         TEKEN_CONS25            # cons25-style terminal emulation
 1493 options         TEKEN_UTF8              # UTF-8 output handling
 1494 
 1495 # The vt video console driver.
 1496 device          vt
 1497 options         VT_ALT_TO_ESC_HACK=1    # Prepend ESC sequence to ALT keys
 1498 options         VT_MAXWINDOWS=16        # Number of virtual consoles
 1499 options         VT_TWOBUTTON_MOUSE      # Use right mouse button to paste
 1500 
 1501 # The following options set the default framebuffer size.
 1502 options         VT_FB_DEFAULT_HEIGHT=480
 1503 options         VT_FB_DEFAULT_WIDTH=640
 1504 
 1505 # The following options will let you change the default vt terminal colors.
 1506 options         TERMINAL_NORM_ATTR=(FG_GREEN|BG_BLACK)
 1507 options         TERMINAL_KERN_ATTR=(FG_LIGHTRED|BG_BLACK)
 1508 
 1509 #
 1510 # Optional devices:
 1511 #
 1512 
 1513 #
 1514 # SCSI host adapters:
 1515 #
 1516 # adv: All Narrow SCSI bus AdvanSys controllers.
 1517 # adw: Second Generation AdvanSys controllers including the ADV940UW.
 1518 # aha: Adaptec 154x/1535/1640
 1519 # ahb: Adaptec 174x EISA controllers
 1520 # ahc: Adaptec 274x/284x/2910/293x/294x/394x/3950x/3960x/398X/4944/
 1521 #      19160x/29160x, aic7770/aic78xx
 1522 # ahd: Adaptec 29320/39320 Controllers.
 1523 # aic: Adaptec 6260/6360, APA-1460 (PC Card), NEC PC9801-100 (C-BUS)
 1524 # bt:  Most Buslogic controllers: including BT-445, BT-54x, BT-64x, BT-74x,
 1525 #      BT-75x, BT-946, BT-948, BT-956, BT-958, SDC3211B, SDC3211F, SDC3222F
 1526 # esp: Emulex ESP, NCR 53C9x and QLogic FAS families based controllers
 1527 #      including the AMD Am53C974 (found on devices such as the Tekram
 1528 #      DC-390(T)) and the Sun ESP and FAS families of controllers
 1529 # isp: Qlogic ISP 1020, 1040 and 1040B PCI SCSI host adapters,
 1530 #      ISP 1240 Dual Ultra SCSI, ISP 1080 and 1280 (Dual) Ultra2,
 1531 #      ISP 12160 Ultra3 SCSI,
 1532 #      Qlogic ISP 2100 and ISP 2200 1Gb Fibre Channel host adapters.
 1533 #      Qlogic ISP 2300 and ISP 2312 2Gb Fibre Channel host adapters.
 1534 #      Qlogic ISP 2322 and ISP 6322 2Gb Fibre Channel host adapters.
 1535 # ispfw: Firmware module for Qlogic host adapters
 1536 # mpt: LSI-Logic MPT/Fusion 53c1020 or 53c1030 Ultra4
 1537 #      or FC9x9 Fibre Channel host adapters.
 1538 # ncr: NCR 53C810, 53C825 self-contained SCSI host adapters.
 1539 # sym: Symbios/Logic 53C8XX family of PCI-SCSI I/O processors:
 1540 #      53C810, 53C810A, 53C815, 53C825,  53C825A, 53C860, 53C875,
 1541 #      53C876, 53C885,  53C895, 53C895A, 53C896,  53C897, 53C1510D,
 1542 #      53C1010-33, 53C1010-66.
 1543 # trm: Tekram DC395U/UW/F DC315U adapters.
 1544 # wds: WD7000
 1545 
 1546 #
 1547 # Note that the order is important in order for Buslogic ISA/EISA cards to be
 1548 # probed correctly.
 1549 #
 1550 device          bt
 1551 hint.bt.0.at="isa"
 1552 hint.bt.0.port="0x330"
 1553 device          adv
 1554 hint.adv.0.at="isa"
 1555 device          adw
 1556 device          aha
 1557 hint.aha.0.at="isa"
 1558 device          aic
 1559 hint.aic.0.at="isa"
 1560 device          ahb
 1561 device          ahc
 1562 device          ahd
 1563 device          esp
 1564 device          iscsi_initiator
 1565 device          isp
 1566 hint.isp.0.disable="1"
 1567 hint.isp.0.role="3"
 1568 hint.isp.0.prefer_iomap="1"
 1569 hint.isp.0.prefer_memmap="1"
 1570 hint.isp.0.fwload_disable="1"
 1571 hint.isp.0.ignore_nvram="1"
 1572 hint.isp.0.fullduplex="1"
 1573 hint.isp.0.topology="lport"
 1574 hint.isp.0.topology="nport"
 1575 hint.isp.0.topology="lport-only"
 1576 hint.isp.0.topology="nport-only"
 1577 # we can't get u_int64_t types, nor can we get strings if it's got
 1578 # a leading 0x, hence this silly dodge.
 1579 hint.isp.0.portwnn="w50000000aaaa0000"
 1580 hint.isp.0.nodewnn="w50000000aaaa0001"
 1581 device          ispfw
 1582 device          mpt
 1583 device          ncr
 1584 device          sym
 1585 device          trm
 1586 device          wds
 1587 hint.wds.0.at="isa"
 1588 hint.wds.0.port="0x350"
 1589 hint.wds.0.irq="11"
 1590 hint.wds.0.drq="6"
 1591 
 1592 # The aic7xxx driver will attempt to use memory mapped I/O for all PCI
 1593 # controllers that have it configured only if this option is set. Unfortunately,
 1594 # this doesn't work on some motherboards, which prevents it from being the
 1595 # default.
 1596 options         AHC_ALLOW_MEMIO
 1597 
 1598 # Dump the contents of the ahc controller configuration PROM.
 1599 options         AHC_DUMP_EEPROM
 1600 
 1601 # Bitmap of units to enable targetmode operations.
 1602 options         AHC_TMODE_ENABLE
 1603 
 1604 # Compile in Aic7xxx Debugging code.
 1605 options         AHC_DEBUG
 1606 
 1607 # Aic7xxx driver debugging options. See sys/dev/aic7xxx/aic7xxx.h
 1608 options         AHC_DEBUG_OPTS
 1609 
 1610 # Print register bitfields in debug output.  Adds ~128k to driver
 1611 # See ahc(4).
 1612 options         AHC_REG_PRETTY_PRINT
 1613 
 1614 # Compile in aic79xx debugging code.
 1615 options         AHD_DEBUG
 1616 
 1617 # Aic79xx driver debugging options.  Adds ~215k to driver.  See ahd(4).
 1618 options         AHD_DEBUG_OPTS=0xFFFFFFFF
 1619 
 1620 # Print human-readable register definitions when debugging
 1621 options         AHD_REG_PRETTY_PRINT
 1622 
 1623 # Bitmap of units to enable targetmode operations.
 1624 options         AHD_TMODE_ENABLE
 1625 
 1626 # The adw driver will attempt to use memory mapped I/O for all PCI
 1627 # controllers that have it configured only if this option is set.
 1628 options         ADW_ALLOW_MEMIO
 1629 
 1630 # Options used in dev/iscsi (Software iSCSI stack)
 1631 #
 1632 options         ISCSI_INITIATOR_DEBUG=9
 1633 
 1634 # Options used in dev/isp/ (Qlogic SCSI/FC driver).
 1635 #
 1636 #       ISP_TARGET_MODE         -       enable target mode operation
 1637 #
 1638 options         ISP_TARGET_MODE=1
 1639 #
 1640 #       ISP_DEFAULT_ROLES       -       default role
 1641 #               none=0
 1642 #               target=1
 1643 #               initiator=2
 1644 #               both=3                  (not supported currently)
 1645 #
 1646 #       ISP_INTERNAL_TARGET             (trivial internal disk target, for testing)
 1647 #
 1648 options         ISP_DEFAULT_ROLES=0
 1649 
 1650 # Options used in dev/sym/ (Symbios SCSI driver).
 1651 #options        SYM_SETUP_LP_PROBE_MAP  #-Low Priority Probe Map (bits)
 1652                                         # Allows the ncr to take precedence
 1653                                         # 1 (1<<0) -> 810a, 860
 1654                                         # 2 (1<<1) -> 825a, 875, 885, 895
 1655                                         # 4 (1<<2) -> 895a, 896, 1510d
 1656 #options        SYM_SETUP_SCSI_DIFF     #-HVD support for 825a, 875, 885
 1657                                         # disabled:0 (default), enabled:1
 1658 #options        SYM_SETUP_PCI_PARITY    #-PCI parity checking
 1659                                         # disabled:0, enabled:1 (default)
 1660 #options        SYM_SETUP_MAX_LUN       #-Number of LUNs supported
 1661                                         # default:8, range:[1..64]
 1662 
 1663 # The 'dpt' driver provides support for old DPT controllers (http://www.dpt.com/).
 1664 # These have hardware RAID-{0,1,5} support, and do multi-initiator I/O.
 1665 # The DPT controllers are commonly re-licensed under other brand-names -
 1666 # some controllers by Olivetti, Dec, HP, AT&T, SNI, AST, Alphatronic, NEC and
 1667 # Compaq are actually DPT controllers.
 1668 #
 1669 # See src/sys/dev/dpt for debugging and other subtle options.
 1670 #  DPT_MEASURE_PERFORMANCE  Enables a set of (semi)invasive metrics. Various
 1671 #                           instruments are enabled.  The tools in
 1672 #                           /usr/sbin/dpt_* assume these to be enabled.
 1673 #  DPT_DEBUG_xxxx           These are controllable from sys/dev/dpt/dpt.h
 1674 #  DPT_RESET_HBA            Make "reset" actually reset the controller
 1675 #                           instead of fudging it.  Only enable this if you
 1676 #                           are 100% certain you need it.
 1677 
 1678 device          dpt
 1679 
 1680 # DPT options
 1681 #!CAM# options  DPT_MEASURE_PERFORMANCE
 1682 options         DPT_RESET_HBA
 1683 
 1684 #
 1685 # Compaq "CISS" RAID controllers (SmartRAID 5* series)
 1686 # These controllers have a SCSI-like interface, and require the
 1687 # CAM infrastructure.
 1688 #
 1689 device          ciss
 1690 
 1691 #
 1692 # Intel Integrated RAID controllers.
 1693 # This driver was developed and is maintained by Intel.  Contacts
 1694 # at Intel for this driver are
 1695 # "Kannanthanam, Boji T" <boji.t.kannanthanam@intel.com> and
 1696 # "Leubner, Achim" <achim.leubner@intel.com>.
 1697 #
 1698 device          iir
 1699 
 1700 #
 1701 # Mylex AcceleRAID and eXtremeRAID controllers with v6 and later
 1702 # firmware.  These controllers have a SCSI-like interface, and require
 1703 # the CAM infrastructure.
 1704 #
 1705 device          mly
 1706 
 1707 #
 1708 # Compaq Smart RAID, Mylex DAC960 and AMI MegaRAID controllers.  Only
 1709 # one entry is needed; the code will find and configure all supported
 1710 # controllers.
 1711 #
 1712 device          ida             # Compaq Smart RAID
 1713 device          mlx             # Mylex DAC960
 1714 device          amr             # AMI MegaRAID
 1715 device          amrp            # SCSI Passthrough interface (optional, CAM req.)
 1716 device          mfi             # LSI MegaRAID SAS
 1717 device          mfip            # LSI MegaRAID SAS passthrough, requires CAM
 1718 options         MFI_DEBUG
 1719 device          mrsas           # LSI/Avago MegaRAID SAS/SATA, 6Gb/s and 12Gb/s
 1720 
 1721 #
 1722 # 3ware ATA RAID
 1723 #
 1724 device          twe             # 3ware ATA RAID
 1725 
 1726 #
 1727 # Serial ATA host controllers:
 1728 #
 1729 # ahci: Advanced Host Controller Interface (AHCI) compatible
 1730 # mvs:  Marvell 88SX50XX/88SX60XX/88SX70XX/SoC controllers
 1731 # siis: SiliconImage SiI3124/SiI3132/SiI3531 controllers
 1732 #
 1733 # These drivers are part of cam(4) subsystem. They supersede less featured
 1734 # ata(4) subsystem drivers, supporting same hardware.
 1735 
 1736 device          ahci
 1737 device          mvs
 1738 device          siis
 1739 
 1740 #
 1741 # The 'ATA' driver supports all legacy ATA/ATAPI controllers, including
 1742 # PC Card devices. You only need one "device ata" for it to find all
 1743 # PCI and PC Card ATA/ATAPI devices on modern machines.
 1744 # Alternatively, individual bus and chipset drivers may be chosen by using
 1745 # the 'atacore' driver then selecting the drivers on a per vendor basis.
 1746 # For example to build a system which only supports a VIA chipset,
 1747 # omit 'ata' and include the 'atacore', 'atapci' and 'atavia' drivers.
 1748 device          ata
 1749 
 1750 # Modular ATA
 1751 #device         atacore         # Core ATA functionality
 1752 #device         atacard         # CARDBUS support
 1753 #device         atabus          # PC98 cbus support
 1754 #device         ataisa          # ISA bus support
 1755 #device         atapci          # PCI bus support; only generic chipset support
 1756 
 1757 # PCI ATA chipsets
 1758 #device         ataacard        # ACARD
 1759 #device         ataacerlabs     # Acer Labs Inc. (ALI)
 1760 #device         ataamd          # American Micro Devices (AMD)
 1761 #device         ataati          # ATI
 1762 #device         atacenatek      # Cenatek
 1763 #device         atacypress      # Cypress
 1764 #device         atacyrix        # Cyrix
 1765 #device         atahighpoint    # HighPoint
 1766 #device         ataintel        # Intel
 1767 #device         ataite          # Integrated Technology Inc. (ITE)
 1768 #device         atajmicron      # JMicron
 1769 #device         atamarvell      # Marvell
 1770 #device         atamicron       # Micron
 1771 #device         atanational     # National
 1772 #device         atanetcell      # NetCell
 1773 #device         atanvidia       # nVidia
 1774 #device         atapromise      # Promise
 1775 #device         ataserverworks  # ServerWorks
 1776 #device         atasiliconimage # Silicon Image Inc. (SiI) (formerly CMD)
 1777 #device         atasis          # Silicon Integrated Systems Corp.(SiS)
 1778 #device         atavia          # VIA Technologies Inc.
 1779 
 1780 #
 1781 # For older non-PCI, non-PnPBIOS systems, these are the hints lines to add:
 1782 hint.ata.0.at="isa"
 1783 hint.ata.0.port="0x1f0"
 1784 hint.ata.0.irq="14"
 1785 hint.ata.1.at="isa"
 1786 hint.ata.1.port="0x170"
 1787 hint.ata.1.irq="15"
 1788 
 1789 #
 1790 # The following options are valid on the ATA driver:
 1791 #
 1792 # ATA_REQUEST_TIMEOUT:  the number of seconds to wait for an ATA request
 1793 #                       before timing out.
 1794 
 1795 #options        ATA_REQUEST_TIMEOUT=10
 1796 
 1797 #
 1798 # Standard floppy disk controllers and floppy tapes, supports
 1799 # the Y-E DATA External FDD (PC Card)
 1800 #
 1801 device          fdc
 1802 hint.fdc.0.at="isa"
 1803 hint.fdc.0.port="0x3F0"
 1804 hint.fdc.0.irq="6"
 1805 hint.fdc.0.drq="2"
 1806 #
 1807 # FDC_DEBUG enables floppy debugging.  Since the debug output is huge, you
 1808 # gotta turn it actually on by setting the variable fd_debug with DDB,
 1809 # however.
 1810 options         FDC_DEBUG
 1811 #
 1812 # Activate this line if you happen to have an Insight floppy tape.
 1813 # Probing them proved to be dangerous for people with floppy disks only,
 1814 # so it's "hidden" behind a flag:
 1815 #hint.fdc.0.flags="1"
 1816 
 1817 # Specify floppy devices
 1818 hint.fd.0.at="fdc0"
 1819 hint.fd.0.drive="0"
 1820 hint.fd.1.at="fdc0"
 1821 hint.fd.1.drive="1"
 1822 
 1823 #
 1824 # uart: newbusified driver for serial interfaces.  It consolidates the sio(4),
 1825 #       sab(4) and zs(4) drivers.
 1826 #
 1827 device          uart
 1828 
 1829 # Options for uart(4)
 1830 options         UART_PPS_ON_CTS         # Do time pulse capturing using CTS
 1831                                         # instead of DCD.
 1832 options         UART_POLL_FREQ          # Set polling rate, used when hw has
 1833                                         # no interrupt support (50 Hz default).
 1834 
 1835 # The following hint should only be used for pure ISA devices.  It is not
 1836 # needed otherwise.  Use of hints is strongly discouraged.
 1837 hint.uart.0.at="isa"
 1838 
 1839 # The following 3 hints are used when the UART is a system device (i.e., a
 1840 # console or debug port), but only on platforms that don't have any other
 1841 # means to pass the information to the kernel.  The unit number of the hint
 1842 # is only used to bundle the hints together.  There is no relation to the
 1843 # unit number of the probed UART.
 1844 hint.uart.0.port="0x3f8"
 1845 hint.uart.0.flags="0x10"
 1846 hint.uart.0.baud="115200"
 1847 
 1848 # `flags' for serial drivers that support consoles like sio(4) and uart(4):
 1849 #       0x10    enable console support for this unit.  Other console flags
 1850 #               (if applicable) are ignored unless this is set.  Enabling
 1851 #               console support does not make the unit the preferred console.
 1852 #               Boot with -h or set boot_serial=YES in the loader.  For sio(4)
 1853 #               specifically, the 0x20 flag can also be set (see above).
 1854 #               Currently, at most one unit can have console support; the
 1855 #               first one (in config file order) with this flag set is
 1856 #               preferred.  Setting this flag for sio0 gives the old behavior.
 1857 #       0x80    use this port for serial line gdb support in ddb.  Also known
 1858 #               as debug port.
 1859 #
 1860 
 1861 # Options for serial drivers that support consoles:
 1862 options         BREAK_TO_DEBUGGER       # A BREAK/DBG on the console goes to
 1863                                         # ddb, if available.
 1864 
 1865 # Solaris implements a new BREAK which is initiated by a character
 1866 # sequence CR ~ ^b which is similar to a familiar pattern used on
 1867 # Sun servers by the Remote Console.  There are FreeBSD extensions:
 1868 # CR ~ ^p requests force panic and CR ~ ^r requests a clean reboot.
 1869 options         ALT_BREAK_TO_DEBUGGER
 1870 
 1871 # Serial Communications Controller
 1872 # Supports the Siemens SAB 82532 and Zilog Z8530 multi-channel
 1873 # communications controllers.
 1874 device          scc
 1875 
 1876 # PCI Universal Communications driver
 1877 # Supports various multi port PCI I/O cards.
 1878 device          puc
 1879 
 1880 #
 1881 # Network interfaces:
 1882 #
 1883 # MII bus support is required for many PCI Ethernet NICs,
 1884 # namely those which use MII-compliant transceivers or implement
 1885 # transceiver control interfaces that operate like an MII.  Adding
 1886 # "device miibus" to the kernel config pulls in support for the generic
 1887 # miibus API, the common support for for bit-bang'ing the MII and all
 1888 # of the PHY drivers, including a generic one for PHYs that aren't
 1889 # specifically handled by an individual driver.  Support for specific
 1890 # PHYs may be built by adding "device mii", "device mii_bitbang" if
 1891 # needed by the NIC driver and then adding the appropriate PHY driver.
 1892 device          mii             # Minimal MII support
 1893 device          mii_bitbang     # Common module for bit-bang'ing the MII
 1894 device          miibus          # MII support w/ bit-bang'ing and all PHYs
 1895 
 1896 device          acphy           # Altima Communications AC101
 1897 device          amphy           # AMD AM79c873 / Davicom DM910{1,2}
 1898 device          atphy           # Attansic/Atheros F1
 1899 device          axphy           # Asix Semiconductor AX88x9x
 1900 device          bmtphy          # Broadcom BCM5201/BCM5202 and 3Com 3c905C
 1901 device          bnxt            # Broadcom NetXtreme-C/NetXtreme-E
 1902 device          brgphy          # Broadcom BCM54xx/57xx 1000baseTX
 1903 device          ciphy           # Cicada/Vitesse CS/VSC8xxx
 1904 device          e1000phy        # Marvell 88E1000 1000/100/10-BT
 1905 device          gentbi          # Generic 10-bit 1000BASE-{LX,SX} fiber ifaces
 1906 device          icsphy          # ICS ICS1889-1893
 1907 device          ip1000phy       # IC Plus IP1000A/IP1001
 1908 device          jmphy           # JMicron JMP211/JMP202
 1909 device          lxtphy          # Level One LXT-970
 1910 device          mlphy           # Micro Linear 6692
 1911 device          nsgphy          # NatSemi DP8361/DP83865/DP83891
 1912 device          nsphy           # NatSemi DP83840A
 1913 device          nsphyter        # NatSemi DP83843/DP83815
 1914 device          pnaphy          # HomePNA
 1915 device          qsphy           # Quality Semiconductor QS6612
 1916 device          rdcphy          # RDC Semiconductor R6040
 1917 device          rgephy          # RealTek 8169S/8110S/8211B/8211C
 1918 device          rlphy           # RealTek 8139
 1919 device          rlswitch        # RealTek 8305
 1920 device          smcphy          # SMSC LAN91C111
 1921 device          tdkphy          # TDK 89Q2120
 1922 device          tlphy           # Texas Instruments ThunderLAN
 1923 device          truephy         # LSI TruePHY
 1924 device          xmphy           # XaQti XMAC II
 1925 
 1926 # an:   Aironet 4500/4800 802.11 wireless adapters. Supports the PCMCIA,
 1927 #       PCI and ISA varieties.
 1928 # ae:   Support for gigabit ethernet adapters based on the Attansic/Atheros
 1929 #       L2 PCI-Express FastEthernet controllers.
 1930 # age:  Support for gigabit ethernet adapters based on the Attansic/Atheros
 1931 #       L1 PCI express gigabit ethernet controllers.
 1932 # alc:  Support for Atheros AR8131/AR8132 PCIe ethernet controllers.
 1933 # ale:  Support for Atheros AR8121/AR8113/AR8114 PCIe ethernet controllers.
 1934 # ath:  Atheros a/b/g WiFi adapters (requires ath_hal and wlan)
 1935 # bce:  Broadcom NetXtreme II (BCM5706/BCM5708) PCI/PCIe Gigabit Ethernet
 1936 #       adapters.
 1937 # bfe:  Broadcom BCM4401 Ethernet adapter.
 1938 # bge:  Support for gigabit ethernet adapters based on the Broadcom
 1939 #       BCM570x family of controllers, including the 3Com 3c996-T,
 1940 #       the Netgear GA302T, the SysKonnect SK-9D21 and SK-9D41, and
 1941 #       the embedded gigE NICs on Dell PowerEdge 2550 servers.
 1942 # bnxt: Broadcom NetXtreme-C and NetXtreme-E PCIe 10/25/50G Ethernet adapters.
 1943 # bxe:  Broadcom NetXtreme II (BCM5771X/BCM578XX) PCIe 10Gb Ethernet
 1944 #       adapters.
 1945 # bwi:  Broadcom BCM430* and BCM431* family of wireless adapters.
 1946 # bwn:  Broadcom BCM43xx family of wireless adapters.
 1947 # cas:  Sun Cassini/Cassini+ and National Semiconductor DP83065 Saturn
 1948 # cm:   Arcnet SMC COM90c26 / SMC COM90c56
 1949 #       (and SMC COM90c66 in '56 compatibility mode) adapters.
 1950 # cxgb: Chelsio T3 based 1GbE/10GbE PCIe Ethernet adapters.
 1951 # cxgbe:Chelsio T4, T5, and T6-based 1/10/25/40/100GbE PCIe Ethernet
 1952 #       adapters.
 1953 # cxgbev: Chelsio T4, T5, and T6-based PCIe Virtual Functions.
 1954 # dc:   Support for PCI fast ethernet adapters based on the DEC/Intel 21143
 1955 #       and various workalikes including:
 1956 #       the ADMtek AL981 Comet and AN985 Centaur, the ASIX Electronics
 1957 #       AX88140A and AX88141, the Davicom DM9100 and DM9102, the Lite-On
 1958 #       82c168 and 82c169 PNIC, the Lite-On/Macronix LC82C115 PNIC II
 1959 #       and the Macronix 98713/98713A/98715/98715A/98725 PMAC. This driver
 1960 #       replaces the old al, ax, dm, pn and mx drivers.  List of brands:
 1961 #       Digital DE500-BA, Kingston KNE100TX, D-Link DFE-570TX, SOHOware SFA110,
 1962 #       SVEC PN102-TX, CNet Pro110B, 120A, and 120B, Compex RL100-TX,
 1963 #       LinkSys LNE100TX, LNE100TX V2.0, Jaton XpressNet, Alfa Inc GFC2204,
 1964 #       KNE110TX.
 1965 # de:   Digital Equipment DC21040
 1966 # em:   Intel Pro/1000 Gigabit Ethernet 82542, 82543, 82544 based adapters.
 1967 # igb:  Intel Pro/1000 PCI Express Gigabit Ethernet: 82575 and later adapters.
 1968 # ep:   3Com 3C509, 3C529, 3C556, 3C562D, 3C563D, 3C572, 3C574X, 3C579, 3C589
 1969 #       and PC Card devices using these chipsets.
 1970 # ex:   Intel EtherExpress Pro/10 and other i82595-based adapters,
 1971 #       Olicom Ethernet PC Card devices.
 1972 # fe:   Fujitsu MB86960A/MB86965A Ethernet
 1973 # fea:  DEC DEFEA EISA FDDI adapter
 1974 # fpa:  Support for the Digital DEFPA PCI FDDI. `device fddi' is also needed.
 1975 # fxp:  Intel EtherExpress Pro/100B
 1976 #       (hint of prefer_iomap can be done to prefer I/O instead of Mem mapping)
 1977 # gem:  Apple GMAC/Sun ERI/Sun GEM
 1978 # hme:  Sun HME (Happy Meal Ethernet)
 1979 # jme:  JMicron JMC260 Fast Ethernet/JMC250 Gigabit Ethernet based adapters.
 1980 # le:   AMD Am7900 LANCE and Am79C9xx PCnet
 1981 # lge:  Support for PCI gigabit ethernet adapters based on the Level 1
 1982 #       LXT1001 NetCellerator chipset. This includes the D-Link DGE-500SX,
 1983 #       SMC TigerCard 1000 (SMC9462SX), and some Addtron cards.
 1984 # lio:  Support for Cavium 23XX Ethernet adapters
 1985 # malo: Marvell Libertas wireless NICs.
 1986 # mwl:  Marvell 88W8363 802.11n wireless NICs.
 1987 #       Requires the mwl firmware module
 1988 # mwlfw: Marvell 88W8363 firmware
 1989 # msk:  Support for gigabit ethernet adapters based on the Marvell/SysKonnect
 1990 #       Yukon II Gigabit controllers, including 88E8021, 88E8022, 88E8061,
 1991 #       88E8062, 88E8035, 88E8036, 88E8038, 88E8050, 88E8052, 88E8053,
 1992 #       88E8055, 88E8056 and D-Link 560T/550SX.
 1993 # lmc:  Support for the LMC/SBE wide-area network interface cards.
 1994 # mlx5: Mellanox ConnectX-4 and ConnectX-4 LX IB and Eth shared code module.
 1995 # mlx5en:Mellanox ConnectX-4 and ConnectX-4 LX PCIe Ethernet adapters.
 1996 # my:   Myson Fast Ethernet (MTD80X, MTD89X)
 1997 # nge:  Support for PCI gigabit ethernet adapters based on the National
 1998 #       Semiconductor DP83820 and DP83821 chipset. This includes the
 1999 #       SMC EZ Card 1000 (SMC9462TX), D-Link DGE-500T, Asante FriendlyNet
 2000 #       GigaNIX 1000TA and 1000TPC, the Addtron AEG320T, the Surecom
 2001 #       EP-320G-TX and the Netgear GA622T.
 2002 # oce:  Emulex 10 Gbit adapters (OneConnect Ethernet)
 2003 # pcn:  Support for PCI fast ethernet adapters based on the AMD Am79c97x
 2004 #       PCnet-FAST, PCnet-FAST+, PCnet-FAST III, PCnet-PRO and PCnet-Home
 2005 #       chipsets. These can also be handled by the le(4) driver if the
 2006 #       pcn(4) driver is left out of the kernel. The le(4) driver does not
 2007 #       support the additional features like the MII bus and burst mode of
 2008 #       the PCnet-FAST and greater chipsets though.
 2009 # ral:  Ralink Technology IEEE 802.11 wireless adapter
 2010 # re:   RealTek 8139C+/8169/816xS/811xS/8101E PCI/PCIe Ethernet adapter
 2011 # rl:   Support for PCI fast ethernet adapters based on the RealTek 8129/8139
 2012 #       chipset.  Note that the RealTek driver defaults to using programmed
 2013 #       I/O to do register accesses because memory mapped mode seems to cause
 2014 #       severe lockups on SMP hardware.  This driver also supports the
 2015 #       Accton EN1207D `Cheetah' adapter, which uses a chip called
 2016 #       the MPX 5030/5038, which is either a RealTek in disguise or a
 2017 #       RealTek workalike.  Note that the D-Link DFE-530TX+ uses the RealTek
 2018 #       chipset and is supported by this driver, not the 'vr' driver.
 2019 # rtwn: RealTek wireless adapters.
 2020 # rtwnfw: RealTek wireless firmware.
 2021 # sf:   Support for Adaptec Duralink PCI fast ethernet adapters based on the
 2022 #       Adaptec AIC-6915 "starfire" controller.
 2023 #       This includes dual and quad port cards, as well as one 100baseFX card.
 2024 #       Most of these are 64-bit PCI devices, except for one single port
 2025 #       card which is 32-bit.
 2026 # sge:  Silicon Integrated Systems SiS190/191 Fast/Gigabit Ethernet adapter
 2027 # sis:  Support for NICs based on the Silicon Integrated Systems SiS 900,
 2028 #       SiS 7016 and NS DP83815 PCI fast ethernet controller chips.
 2029 # sk:   Support for the SysKonnect SK-984x series PCI gigabit ethernet NICs.
 2030 #       This includes the SK-9841 and SK-9842 single port cards (single mode
 2031 #       and multimode fiber) and the SK-9843 and SK-9844 dual port cards
 2032 #       (also single mode and multimode).
 2033 #       The driver will autodetect the number of ports on the card and
 2034 #       attach each one as a separate network interface.
 2035 # sn:   Support for ISA and PC Card Ethernet devices using the
 2036 #       SMC91C90/92/94/95 chips.
 2037 # ste:  Sundance Technologies ST201 PCI fast ethernet controller, includes
 2038 #       the D-Link DFE-550TX.
 2039 # stge: Support for gigabit ethernet adapters based on the Sundance/Tamarack
 2040 #       TC9021 family of controllers, including the Sundance ST2021/ST2023,
 2041 #       the Sundance/Tamarack TC9021, the D-Link DL-4000 and ASUS NX1101.
 2042 # ti:   Support for PCI gigabit ethernet NICs based on the Alteon Networks
 2043 #       Tigon 1 and Tigon 2 chipsets.  This includes the Alteon AceNIC, the
 2044 #       3Com 3c985, the Netgear GA620 and various others.  Note that you will
 2045 #       probably want to bump up kern.ipc.nmbclusters a lot to use this driver.
 2046 # tl:   Support for the Texas Instruments TNETE100 series 'ThunderLAN'
 2047 #       cards and integrated ethernet controllers.  This includes several
 2048 #       Compaq Netelligent 10/100 cards and the built-in ethernet controllers
 2049 #       in several Compaq Prosignia, Proliant and Deskpro systems.  It also
 2050 #       supports several Olicom 10Mbps and 10/100 boards.
 2051 # tx:   SMC 9432 TX, BTX and FTX cards. (SMC EtherPower II series)
 2052 # txp:  Support for 3Com 3cR990 cards with the "Typhoon" chipset
 2053 # vr:   Support for various fast ethernet adapters based on the VIA
 2054 #       Technologies VT3043 `Rhine I' and VT86C100A `Rhine II' chips,
 2055 #       including the D-Link DFE520TX and D-Link DFE530TX (see 'rl' for
 2056 #       DFE530TX+), the Hawking Technologies PN102TX, and the AOpen/Acer ALN-320.
 2057 # vte:  DM&P Vortex86 RDC R6040 Fast Ethernet
 2058 # vx:   3Com 3C590 and 3C595
 2059 # wb:   Support for fast ethernet adapters based on the Winbond W89C840F chip.
 2060 #       Note: this is not the same as the Winbond W89C940F, which is a
 2061 #       NE2000 clone.
 2062 # wi:   Lucent WaveLAN/IEEE 802.11 PCMCIA adapters. Note: this supports both
 2063 #       the PCMCIA and ISA cards: the ISA card is really a PCMCIA to ISA
 2064 #       bridge with a PCMCIA adapter plugged into it.
 2065 # xe:   Xircom/Intel EtherExpress Pro100/16 PC Card ethernet controller,
 2066 #       Accton Fast EtherCard-16, Compaq Netelligent 10/100 PC Card,
 2067 #       Toshiba 10/100 Ethernet PC Card, Xircom 16-bit Ethernet + Modem 56
 2068 # xl:   Support for the 3Com 3c900, 3c905, 3c905B and 3c905C (Fast)
 2069 #       Etherlink XL cards and integrated controllers.  This includes the
 2070 #       integrated 3c905B-TX chips in certain Dell Optiplex and Dell
 2071 #       Precision desktop machines and the integrated 3c905-TX chips
 2072 #       in Dell Latitude laptop docking stations.
 2073 #       Also supported: 3Com 3c980(C)-TX, 3Com 3cSOHO100-TX, 3Com 3c450-TX
 2074 
 2075 # Order for ISA/EISA devices is important here
 2076 
 2077 device          cm
 2078 hint.cm.0.at="isa"
 2079 hint.cm.0.port="0x2e0"
 2080 hint.cm.0.irq="9"
 2081 hint.cm.0.maddr="0xdc000"
 2082 device          ep
 2083 device          ex
 2084 device          fe
 2085 hint.fe.0.at="isa"
 2086 hint.fe.0.port="0x300"
 2087 device          fea
 2088 device          sn
 2089 hint.sn.0.at="isa"
 2090 hint.sn.0.port="0x300"
 2091 hint.sn.0.irq="10"
 2092 device          an
 2093 device          wi
 2094 device          xe
 2095 
 2096 # PCI Ethernet NICs that use the common MII bus controller code.
 2097 device          ae              # Attansic/Atheros L2 FastEthernet
 2098 device          age             # Attansic/Atheros L1 Gigabit Ethernet
 2099 device          alc             # Atheros AR8131/AR8132 Ethernet
 2100 device          ale             # Atheros AR8121/AR8113/AR8114 Ethernet
 2101 device          bce             # Broadcom BCM5706/BCM5708 Gigabit Ethernet
 2102 device          bfe             # Broadcom BCM440x 10/100 Ethernet
 2103 device          bge             # Broadcom BCM570xx Gigabit Ethernet
 2104 device          cas             # Sun Cassini/Cassini+ and NS DP83065 Saturn
 2105 device          dc              # DEC/Intel 21143 and various workalikes
 2106 device          et              # Agere ET1310 10/100/Gigabit Ethernet
 2107 device          fxp             # Intel EtherExpress PRO/100B (82557, 82558)
 2108 hint.fxp.0.prefer_iomap="0"
 2109 device          gem             # Apple GMAC/Sun ERI/Sun GEM
 2110 device          hme             # Sun HME (Happy Meal Ethernet)
 2111 device          jme             # JMicron JMC250 Gigabit/JMC260 Fast Ethernet
 2112 device          lge             # Level 1 LXT1001 gigabit Ethernet
 2113 device          mlx5            # Shared code module between IB and Ethernet
 2114 device          mlx5en          # Mellanox ConnectX-4 and ConnectX-4 LX
 2115 device          msk             # Marvell/SysKonnect Yukon II Gigabit Ethernet
 2116 device          my              # Myson Fast Ethernet (MTD80X, MTD89X)
 2117 device          nge             # NatSemi DP83820 gigabit Ethernet
 2118 device          re              # RealTek 8139C+/8169/8169S/8110S
 2119 device          rl              # RealTek 8129/8139
 2120 device          pcn             # AMD Am79C97x PCI 10/100 NICs
 2121 device          sf              # Adaptec AIC-6915 (``Starfire'')
 2122 device          sge             # Silicon Integrated Systems SiS190/191
 2123 device          sis             # Silicon Integrated Systems SiS 900/SiS 7016
 2124 device          sk              # SysKonnect SK-984x & SK-982x gigabit Ethernet
 2125 device          ste             # Sundance ST201 (D-Link DFE-550TX)
 2126 device          stge            # Sundance/Tamarack TC9021 gigabit Ethernet
 2127 device          tl              # Texas Instruments ThunderLAN
 2128 device          tx              # SMC EtherPower II (83c170 ``EPIC'')
 2129 device          vr              # VIA Rhine, Rhine II
 2130 device          vte             # DM&P Vortex86 RDC R6040 Fast Ethernet
 2131 device          wb              # Winbond W89C840F
 2132 device          xl              # 3Com 3c90x (``Boomerang'', ``Cyclone'')
 2133 
 2134 # PCI Ethernet NICs.
 2135 device          cxgb            # Chelsio T3 10 Gigabit Ethernet
 2136 device          cxgb_t3fw       # Chelsio T3 10 Gigabit Ethernet firmware
 2137 device          cxgbe           # Chelsio T4-T6 1/10/25/40/100 Gigabit Ethernet
 2138 device          cxgbev          # Chelsio T4-T6 Virtual Functions
 2139 device          de              # DEC/Intel DC21x4x (``Tulip'')
 2140 device          em              # Intel Pro/1000 Gigabit Ethernet
 2141 device          igb             # Intel Pro/1000 PCIE Gigabit Ethernet
 2142 device          ixgb            # Intel Pro/10Gbe PCI-X Ethernet
 2143 device          ix              # Intel Pro/10Gbe PCIE Ethernet
 2144 device          ixv             # Intel Pro/10Gbe PCIE Ethernet VF
 2145 device          le              # AMD Am7900 LANCE and Am79C9xx PCnet
 2146 device          mxge            # Myricom Myri-10G 10GbE NIC
 2147 device          nxge            # Neterion Xframe 10GbE Server/Storage Adapter
 2148 device          oce             # Emulex 10 GbE (OneConnect Ethernet)
 2149 device          ti              # Alteon Networks Tigon I/II gigabit Ethernet
 2150 device          txp             # 3Com 3cR990 (``Typhoon'')
 2151 device          vx              # 3Com 3c590, 3c595 (``Vortex'')
 2152 device          vxge            # Exar/Neterion XFrame 3100 10GbE
 2153 
 2154 # PCI FDDI NICs.
 2155 device          fpa
 2156 
 2157 # PCI WAN adapters.
 2158 device          lmc
 2159 
 2160 # PCI IEEE 802.11 Wireless NICs
 2161 device          ath             # Atheros pci/cardbus NIC's
 2162 device          ath_hal         # pci/cardbus chip support
 2163 #device         ath_ar5210      # AR5210 chips
 2164 #device         ath_ar5211      # AR5211 chips
 2165 #device         ath_ar5212      # AR5212 chips
 2166 #device         ath_rf2413
 2167 #device         ath_rf2417
 2168 #device         ath_rf2425
 2169 #device         ath_rf5111
 2170 #device         ath_rf5112
 2171 #device         ath_rf5413
 2172 #device         ath_ar5416      # AR5416 chips
 2173 options         AH_SUPPORT_AR5416       # enable AR5416 tx/rx descriptors
 2174 # All of the AR5212 parts have a problem when paired with the AR71xx
 2175 # CPUS.  These parts have a bug that triggers a fatal bus error on the AR71xx
 2176 # only.  Details of the exact nature of the bug are sketchy, but some can be
 2177 # found at https://forum.openwrt.org/viewtopic.php?pid=70060 on pages 4, 5 and
 2178 # 6.  This option enables this workaround.  There is a performance penalty
 2179 # for this work around, but without it things don't work at all.  The DMA
 2180 # from the card usually bursts 128 bytes, but on the affected CPUs, only
 2181 # 4 are safe.
 2182 options         AH_RXCFG_SDMAMW_4BYTES
 2183 #device         ath_ar9160      # AR9160 chips
 2184 #device         ath_ar9280      # AR9280 chips
 2185 #device         ath_ar9285      # AR9285 chips
 2186 device          ath_rate_sample # SampleRate tx rate control for ath
 2187 device          bwi             # Broadcom BCM430* BCM431*
 2188 device          bwn             # Broadcom BCM43xx
 2189 device          malo            # Marvell Libertas wireless NICs.
 2190 device          mwl             # Marvell 88W8363 802.11n wireless NICs.
 2191 device          mwlfw
 2192 device          ral             # Ralink Technology RT2500 wireless NICs.
 2193 device          rtwn            # Realtek wireless NICs
 2194 device          rtwnfw
 2195 
 2196 # Use sf_buf(9) interface for jumbo buffers on ti(4) controllers.
 2197 #options        TI_SF_BUF_JUMBO
 2198 # Turn on the header splitting option for the ti(4) driver firmware.  This
 2199 # only works for Tigon II chips, and has no effect for Tigon I chips.
 2200 # This option requires the TI_SF_BUF_JUMBO option above.
 2201 #options        TI_JUMBO_HDRSPLIT
 2202 
 2203 # These two options allow manipulating the mbuf cluster size and mbuf size,
 2204 # respectively.  Be very careful with NIC driver modules when changing
 2205 # these from their default values, because that can potentially cause a
 2206 # mismatch between the mbuf size assumed by the kernel and the mbuf size
 2207 # assumed by a module.  The only driver that currently has the ability to
 2208 # detect a mismatch is ti(4).
 2209 options         MCLSHIFT=12     # mbuf cluster shift in bits, 12 == 4KB
 2210 options         MSIZE=512       # mbuf size in bytes
 2211 
 2212 #
 2213 # ATM related options (Cranor version)
 2214 # (note: this driver cannot be used with the HARP ATM stack)
 2215 #
 2216 # The `en' device provides support for Efficient Networks (ENI)
 2217 # ENI-155 PCI midway cards, and the Adaptec 155Mbps PCI ATM cards (ANA-59x0).
 2218 #
 2219 # The `hatm' device provides support for Fore/Marconi HE155 and HE622
 2220 # ATM PCI cards.
 2221 #
 2222 # The `fatm' device provides support for Fore PCA200E ATM PCI cards.
 2223 #
 2224 # The `patm' device provides support for IDT77252 based cards like
 2225 # ProSum's ProATM-155 and ProATM-25 and IDT's evaluation boards.
 2226 #
 2227 # atm device provides generic atm functions and is required for
 2228 # atm devices.
 2229 # NATM enables the netnatm protocol family that can be used to
 2230 # bypass TCP/IP.
 2231 #
 2232 # utopia provides the access to the ATM PHY chips and is required for en,
 2233 # hatm and fatm.
 2234 #
 2235 # the current driver supports only PVC operations (no atm-arp, no multicast).
 2236 # for more details, please read the original documents at
 2237 # http://www.ccrc.wustl.edu/pub/chuck/tech/bsdatm/bsdatm.html
 2238 #
 2239 device          atm
 2240 device          en
 2241 device          fatm                    #Fore PCA200E
 2242 device          hatm                    #Fore/Marconi HE155/622
 2243 device          patm                    #IDT77252 cards (ProATM and IDT)
 2244 device          utopia                  #ATM PHY driver
 2245 options         NATM                    #native ATM
 2246 
 2247 options         LIBMBPOOL               #needed by patm, iatm
 2248 
 2249 #
 2250 # Sound drivers
 2251 #
 2252 # sound: The generic sound driver.
 2253 #
 2254 
 2255 device          sound
 2256 
 2257 #
 2258 # snd_*: Device-specific drivers.
 2259 #
 2260 # The flags of the device tell the device a bit more info about the
 2261 # device that normally is obtained through the PnP interface.
 2262 #       bit  2..0   secondary DMA channel;
 2263 #       bit  4      set if the board uses two dma channels;
 2264 #       bit 15..8   board type, overrides autodetection; leave it
 2265 #                   zero if don't know what to put in (and you don't,
 2266 #                   since this is unsupported at the moment...).
 2267 #
 2268 # snd_ad1816:           Analog Devices AD1816 ISA PnP/non-PnP.
 2269 # snd_als4000:          Avance Logic ALS4000 PCI.
 2270 # snd_atiixp:           ATI IXP 200/300/400 PCI.
 2271 # snd_audiocs:          Crystal Semiconductor CS4231 SBus/EBus. Only
 2272 #                       for sparc64.
 2273 # snd_cmi:              CMedia CMI8338/CMI8738 PCI.
 2274 # snd_cs4281:           Crystal Semiconductor CS4281 PCI.
 2275 # snd_csa:              Crystal Semiconductor CS461x/428x PCI. (except
 2276 #                       4281)
 2277 # snd_ds1:              Yamaha DS-1 PCI.
 2278 # snd_emu10k1:          Creative EMU10K1 PCI and EMU10K2 (Audigy) PCI.
 2279 # snd_emu10kx:          Creative SoundBlaster Live! and Audigy
 2280 # snd_envy24:           VIA Envy24 and compatible, needs snd_spicds.
 2281 # snd_envy24ht:         VIA Envy24HT and compatible, needs snd_spicds.
 2282 # snd_es137x:           Ensoniq AudioPCI ES137x PCI.
 2283 # snd_ess:              Ensoniq ESS ISA PnP/non-PnP, to be used in
 2284 #                       conjunction with snd_sbc.
 2285 # snd_fm801:            Forte Media FM801 PCI.
 2286 # snd_gusc:             Gravis UltraSound ISA PnP/non-PnP.
 2287 # snd_hda:              Intel High Definition Audio (Controller) and
 2288 #                       compatible.
 2289 # snd_hdspe:            RME HDSPe AIO and RayDAT.
 2290 # snd_ich:              Intel ICH AC'97 and some more audio controllers
 2291 #                       embedded in a chipset, for example nVidia
 2292 #                       nForce controllers.
 2293 # snd_maestro:          ESS Technology Maestro-1/2x PCI.
 2294 # snd_maestro3:         ESS Technology Maestro-3/Allegro PCI.
 2295 # snd_mss:              Microsoft Sound System ISA PnP/non-PnP.
 2296 # snd_neomagic:         Neomagic 256 AV/ZX PCI.
 2297 # snd_sb16:             Creative SoundBlaster16, to be used in
 2298 #                       conjunction with snd_sbc.
 2299 # snd_sb8:              Creative SoundBlaster (pre-16), to be used in
 2300 #                       conjunction with snd_sbc.
 2301 # snd_sbc:              Creative SoundBlaster ISA PnP/non-PnP.
 2302 #                       Supports ESS and Avance ISA chips as well.
 2303 # snd_solo:             ESS Solo-1x PCI.
 2304 # snd_spicds:           SPI codec driver, needed by Envy24/Envy24HT drivers.
 2305 # snd_t4dwave:          Trident 4DWave DX/NX PCI, Sis 7018 PCI and Acer Labs
 2306 #                       M5451 PCI.
 2307 # snd_uaudio:           USB audio.
 2308 # snd_via8233:          VIA VT8233x PCI.
 2309 # snd_via82c686:        VIA VT82C686A PCI.
 2310 # snd_vibes:            S3 Sonicvibes PCI.
 2311 
 2312 device          snd_ad1816
 2313 device          snd_als4000
 2314 device          snd_atiixp
 2315 #device         snd_audiocs
 2316 device          snd_cmi
 2317 device          snd_cs4281
 2318 device          snd_csa
 2319 device          snd_ds1
 2320 device          snd_emu10k1
 2321 device          snd_emu10kx
 2322 device          snd_envy24
 2323 device          snd_envy24ht
 2324 device          snd_es137x
 2325 device          snd_ess
 2326 device          snd_fm801
 2327 device          snd_gusc
 2328 device          snd_hda
 2329 device          snd_hdspe
 2330 device          snd_ich
 2331 device          snd_maestro
 2332 device          snd_maestro3
 2333 device          snd_mss
 2334 device          snd_neomagic
 2335 device          snd_sb16
 2336 device          snd_sb8
 2337 device          snd_sbc
 2338 device          snd_solo
 2339 device          snd_spicds
 2340 device          snd_t4dwave
 2341 device          snd_uaudio
 2342 device          snd_via8233
 2343 device          snd_via82c686
 2344 device          snd_vibes
 2345 
 2346 # For non-PnP sound cards:
 2347 hint.pcm.0.at="isa"
 2348 hint.pcm.0.irq="10"
 2349 hint.pcm.0.drq="1"
 2350 hint.pcm.0.flags="0x0"
 2351 hint.sbc.0.at="isa"
 2352 hint.sbc.0.port="0x220"
 2353 hint.sbc.0.irq="5"
 2354 hint.sbc.0.drq="1"
 2355 hint.sbc.0.flags="0x15"
 2356 hint.gusc.0.at="isa"
 2357 hint.gusc.0.port="0x220"
 2358 hint.gusc.0.irq="5"
 2359 hint.gusc.0.drq="1"
 2360 hint.gusc.0.flags="0x13"
 2361 
 2362 #
 2363 # Following options are intended for debugging/testing purposes:
 2364 #
 2365 # SND_DEBUG                    Enable extra debugging code that includes
 2366 #                              sanity checking and possible increase of
 2367 #                              verbosity.
 2368 #
 2369 # SND_DIAGNOSTIC               Similar in a spirit of INVARIANTS/DIAGNOSTIC,
 2370 #                              zero tolerance against inconsistencies.
 2371 #
 2372 # SND_FEEDER_MULTIFORMAT       By default, only 16/32 bit feeders are compiled
 2373 #                              in. This options enable most feeder converters
 2374 #                              except for 8bit. WARNING: May bloat the kernel.
 2375 #
 2376 # SND_FEEDER_FULL_MULTIFORMAT  Ditto, but includes 8bit feeders as well.
 2377 #
 2378 # SND_FEEDER_RATE_HP           (feeder_rate) High precision 64bit arithmetic
 2379 #                              as much as possible (the default trying to
 2380 #                              avoid it). Possible slowdown.
 2381 #
 2382 # SND_PCM_64                   (Only applicable for i386/32bit arch)
 2383 #                              Process 32bit samples through 64bit
 2384 #                              integer/arithmetic. Slight increase of dynamic
 2385 #                              range at a cost of possible slowdown.
 2386 #
 2387 # SND_OLDSTEREO                Only 2 channels are allowed, effectively
 2388 #                              disabling multichannel processing.
 2389 #
 2390 options         SND_DEBUG
 2391 options         SND_DIAGNOSTIC
 2392 options         SND_FEEDER_MULTIFORMAT
 2393 options         SND_FEEDER_FULL_MULTIFORMAT
 2394 options         SND_FEEDER_RATE_HP
 2395 options         SND_PCM_64
 2396 options         SND_OLDSTEREO
 2397 
 2398 #
 2399 # Miscellaneous hardware:
 2400 #
 2401 # scd: Sony CD-ROM using proprietary (non-ATAPI) interface
 2402 # mcd: Mitsumi CD-ROM using proprietary (non-ATAPI) interface
 2403 # bktr: Brooktree bt848/848a/849a/878/879 video capture and TV Tuner board
 2404 # joy: joystick (including IO DATA PCJOY PC Card joystick)
 2405 # cmx: OmniKey CardMan 4040 pccard smartcard reader
 2406 
 2407 # Mitsumi CD-ROM
 2408 device          mcd
 2409 hint.mcd.0.at="isa"
 2410 hint.mcd.0.port="0x300"
 2411 # for the Sony CDU31/33A CDROM
 2412 device          scd
 2413 hint.scd.0.at="isa"
 2414 hint.scd.0.port="0x230"
 2415 device          joy                     # PnP aware, hints for non-PnP only
 2416 hint.joy.0.at="isa"
 2417 hint.joy.0.port="0x201"
 2418 device          cmx
 2419 
 2420 #
 2421 # The 'bktr' device is a PCI video capture device using the Brooktree
 2422 # bt848/bt848a/bt849a/bt878/bt879 chipset. When used with a TV Tuner it forms a
 2423 # TV card, e.g. Miro PC/TV, Hauppauge WinCast/TV WinTV, VideoLogic Captivator,
 2424 # Intel Smart Video III, AverMedia, IMS Turbo, FlyVideo.
 2425 #
 2426 # options       OVERRIDE_CARD=xxx
 2427 # options       OVERRIDE_TUNER=xxx
 2428 # options       OVERRIDE_MSP=1
 2429 # options       OVERRIDE_DBX=1
 2430 # These options can be used to override the auto detection
 2431 # The current values for xxx are found in src/sys/dev/bktr/bktr_card.h
 2432 # Using sysctl(8) run-time overrides on a per-card basis can be made
 2433 #
 2434 # options       BROOKTREE_SYSTEM_DEFAULT=BROOKTREE_PAL
 2435 # or
 2436 # options       BROOKTREE_SYSTEM_DEFAULT=BROOKTREE_NTSC
 2437 # Specifies the default video capture mode.
 2438 # This is required for Dual Crystal (28&35MHz) boards where PAL is used
 2439 # to prevent hangs during initialization, e.g. VideoLogic Captivator PCI.
 2440 #
 2441 # options       BKTR_USE_PLL
 2442 # This is required for PAL or SECAM boards with a 28MHz crystal and no 35MHz
 2443 # crystal, e.g. some new Bt878 cards.
 2444 #
 2445 # options       BKTR_GPIO_ACCESS
 2446 # This enables IOCTLs which give user level access to the GPIO port.
 2447 #
 2448 # options       BKTR_NO_MSP_RESET
 2449 # Prevents the MSP34xx reset. Good if you initialize the MSP in another OS first
 2450 #
 2451 # options       BKTR_430_FX_MODE
 2452 # Switch Bt878/879 cards into Intel 430FX chipset compatibility mode.
 2453 #
 2454 # options       BKTR_SIS_VIA_MODE
 2455 # Switch Bt878/879 cards into SIS/VIA chipset compatibility mode which is
 2456 # needed for some old SiS and VIA chipset motherboards.
 2457 # This also allows Bt878/879 chips to work on old OPTi (<1997) chipset
 2458 # motherboards and motherboards with bad or incomplete PCI 2.1 support.
 2459 # As a rough guess, old = before 1998
 2460 #
 2461 # options       BKTR_NEW_MSP34XX_DRIVER
 2462 # Use new, more complete initialization scheme for the msp34* soundchip.
 2463 # Should fix stereo autodetection if the old driver does only output
 2464 # mono sound.
 2465 
 2466 #
 2467 # options       BKTR_USE_FREEBSD_SMBUS
 2468 # Compile with FreeBSD SMBus implementation
 2469 #
 2470 # Brooktree driver has been ported to the new I2C framework. Thus,
 2471 # you'll need to have the following 3 lines in the kernel config.
 2472 #     device smbus
 2473 #     device iicbus
 2474 #     device iicbb
 2475 #     device iicsmb
 2476 # The iic and smb devices are only needed if you want to control other
 2477 # I2C slaves connected to the external connector of some cards.
 2478 #
 2479 device          bktr
 2480  
 2481 #
 2482 # PC Card/PCMCIA and Cardbus
 2483 #
 2484 # cbb: pci/cardbus bridge implementing YENTA interface
 2485 # pccard: pccard slots
 2486 # cardbus: cardbus slots
 2487 device          cbb
 2488 device          pccard
 2489 device          cardbus
 2490 
 2491 #
 2492 # MMC/SD
 2493 #
 2494 # mmc           MMC/SD bus
 2495 # mmcsd         MMC/SD memory card
 2496 # sdhci         Generic PCI SD Host Controller
 2497 #
 2498 device          mmc
 2499 device          mmcsd
 2500 device          sdhci
 2501 
 2502 #
 2503 # SMB bus
 2504 #
 2505 # System Management Bus support is provided by the 'smbus' device.
 2506 # Access to the SMBus device is via the 'smb' device (/dev/smb*),
 2507 # which is a child of the 'smbus' device.
 2508 #
 2509 # Supported devices:
 2510 # smb           standard I/O through /dev/smb*
 2511 #
 2512 # Supported SMB interfaces:
 2513 # iicsmb        I2C to SMB bridge with any iicbus interface
 2514 # bktr          brooktree848 I2C hardware interface
 2515 # intpm         Intel PIIX4 (82371AB, 82443MX) Power Management Unit
 2516 # alpm          Acer Aladdin-IV/V/Pro2 Power Management Unit
 2517 # ichsmb        Intel ICH SMBus controller chips (82801AA, 82801AB, 82801BA)
 2518 # viapm         VIA VT82C586B/596B/686A and VT8233 Power Management Unit
 2519 # amdpm         AMD 756 Power Management Unit
 2520 # amdsmb        AMD 8111 SMBus 2.0 Controller
 2521 # nfpm          NVIDIA nForce Power Management Unit
 2522 # nfsmb         NVIDIA nForce2/3/4 MCP SMBus 2.0 Controller
 2523 # ismt          Intel SMBus 2.0 controller chips (on Atom S1200, C2000)
 2524 #
 2525 device          smbus           # Bus support, required for smb below.
 2526 
 2527 device          intpm
 2528 device          alpm
 2529 device          ichsmb
 2530 device          viapm
 2531 device          amdpm
 2532 device          amdsmb
 2533 device          nfpm
 2534 device          nfsmb
 2535 device          ismt
 2536 
 2537 device          smb
 2538 
 2539 # SMBus peripheral devices
 2540 #
 2541 # jedec_ts      Temperature Sensor compliant with JEDEC Standard 21-C
 2542 #
 2543 device          jedec_ts
 2544 
 2545 # I2C Bus
 2546 #
 2547 # Philips i2c bus support is provided by the `iicbus' device.
 2548 #
 2549 # Supported devices:
 2550 # ic    i2c network interface
 2551 # iic   i2c standard io
 2552 # iicsmb i2c to smb bridge. Allow i2c i/o with smb commands.
 2553 # iicoc simple polling driver for OpenCores I2C controller
 2554 #
 2555 # Supported interfaces:
 2556 # bktr  brooktree848 I2C software interface
 2557 #
 2558 # Other:
 2559 # iicbb generic I2C bit-banging code (needed by lpbb, bktr)
 2560 #
 2561 device          iicbus          # Bus support, required for ic/iic/iicsmb below.
 2562 device          iicbb
 2563 
 2564 device          ic
 2565 device          iic
 2566 device          iicsmb          # smb over i2c bridge
 2567 device          iicoc           # OpenCores I2C controller support
 2568 
 2569 # I2C peripheral devices
 2570 #
 2571 device          ds1307          # Dallas DS1307 RTC and compatible
 2572 device          ds13rtc         # All Dallas/Maxim ds13xx chips
 2573 device          ds1672          # Dallas DS1672 RTC
 2574 device          ds3231          # Dallas DS3231 RTC + temperature
 2575 device          icee            # AT24Cxxx and compatible EEPROMs
 2576 device          lm75            # LM75 compatible temperature sensor
 2577 device          nxprtc          # NXP RTCs: PCA/PFC212x PCA/PCF85xx
 2578 device          s35390a         # Seiko Instruments S-35390A RTC
 2579 
 2580 # Parallel-Port Bus
 2581 #
 2582 # Parallel port bus support is provided by the `ppbus' device.
 2583 # Multiple devices may be attached to the parallel port, devices
 2584 # are automatically probed and attached when found.
 2585 #
 2586 # Supported devices:
 2587 # vpo   Iomega Zip Drive
 2588 #       Requires SCSI disk support ('scbus' and 'da'), best
 2589 #       performance is achieved with ports in EPP 1.9 mode.
 2590 # lpt   Parallel Printer
 2591 # plip  Parallel network interface
 2592 # ppi   General-purpose I/O ("Geek Port") + IEEE1284 I/O
 2593 # pps   Pulse per second Timing Interface
 2594 # lpbb  Philips official parallel port I2C bit-banging interface
 2595 # pcfclock Parallel port clock driver.
 2596 #
 2597 # Supported interfaces:
 2598 # ppc   ISA-bus parallel port interfaces.
 2599 #
 2600 
 2601 options         PPC_PROBE_CHIPSET # Enable chipset specific detection
 2602                                   # (see flags in ppc(4))
 2603 options         DEBUG_1284      # IEEE1284 signaling protocol debug
 2604 options         PERIPH_1284     # Makes your computer act as an IEEE1284
 2605                                 # compliant peripheral
 2606 options         DONTPROBE_1284  # Avoid boot detection of PnP parallel devices
 2607 options         VP0_DEBUG       # ZIP/ZIP+ debug
 2608 options         LPT_DEBUG       # Printer driver debug
 2609 options         PPC_DEBUG       # Parallel chipset level debug
 2610 options         PLIP_DEBUG      # Parallel network IP interface debug
 2611 options         PCFCLOCK_VERBOSE         # Verbose pcfclock driver
 2612 options         PCFCLOCK_MAX_RETRIES=5   # Maximum read tries (default 10)
 2613 
 2614 device          ppc
 2615 hint.ppc.0.at="isa"
 2616 hint.ppc.0.irq="7"
 2617 device          ppbus
 2618 device          vpo
 2619 device          lpt
 2620 device          plip
 2621 device          ppi
 2622 device          pps
 2623 device          lpbb
 2624 device          pcfclock
 2625 
 2626 #
 2627 # Etherswitch framework and drivers
 2628 #
 2629 # etherswitch   The etherswitch(4) framework
 2630 # miiproxy      Proxy device for miibus(4) functionality
 2631 # 
 2632 # Switch hardware support:
 2633 # arswitch      Atheros switches
 2634 # ip17x         IC+ 17x family switches
 2635 # rtl8366r      Realtek RTL8366 switches
 2636 # ukswitch      Multi-PHY switches
 2637 #
 2638 device          etherswitch
 2639 device          miiproxy
 2640 device          arswitch
 2641 device          ip17x
 2642 device          rtl8366rb
 2643 device          ukswitch
 2644 
 2645 # Kernel BOOTP support
 2646 
 2647 options         BOOTP           # Use BOOTP to obtain IP address/hostname
 2648                                 # Requires NFSCL and NFS_ROOT
 2649 options         BOOTP_NFSROOT   # NFS mount root filesystem using BOOTP info
 2650 options         BOOTP_NFSV3     # Use NFS v3 to NFS mount root
 2651 options         BOOTP_COMPAT    # Workaround for broken bootp daemons.
 2652 options         BOOTP_WIRED_TO=fxp0 # Use interface fxp0 for BOOTP
 2653 options         BOOTP_BLOCKSIZE=8192 # Override NFS block size
 2654 
 2655 #
 2656 # Add software watchdog routines.
 2657 #
 2658 options         SW_WATCHDOG
 2659 
 2660 #
 2661 # Add the software deadlock resolver thread.
 2662 #
 2663 options         DEADLKRES
 2664 
 2665 #
 2666 # Disable swapping of stack pages.  This option removes all
 2667 # code which actually performs swapping, so it's not possible to turn
 2668 # it back on at run-time.
 2669 #
 2670 # This is sometimes usable for systems which don't have any swap space
 2671 # (see also sysctls "vm.defer_swapspace_pageouts" and
 2672 # "vm.disable_swapspace_pageouts")
 2673 #
 2674 #options        NO_SWAPPING
 2675 
 2676 # Set the number of sf_bufs to allocate. sf_bufs are virtual buffers
 2677 # for sendfile(2) that are used to map file VM pages, and normally
 2678 # default to a quantity that is roughly 16*MAXUSERS+512. You would
 2679 # typically want about 4 of these for each simultaneous file send.
 2680 #
 2681 options         NSFBUFS=1024
 2682 
 2683 #
 2684 # Enable extra debugging code for locks.  This stores the filename and
 2685 # line of whatever acquired the lock in the lock itself, and changes a
 2686 # number of function calls to pass around the relevant data.  This is
 2687 # not at all useful unless you are debugging lock code.  Note that
 2688 # modules should be recompiled as this option modifies KBI.
 2689 #
 2690 options         DEBUG_LOCKS
 2691 
 2692 
 2693 #####################################################################
 2694 # USB support
 2695 # UHCI controller
 2696 device          uhci
 2697 # OHCI controller
 2698 device          ohci
 2699 # EHCI controller
 2700 device          ehci
 2701 # XHCI controller
 2702 device          xhci
 2703 # SL811 Controller
 2704 #device         slhci
 2705 # General USB code (mandatory for USB)
 2706 device          usb
 2707 #
 2708 # USB Double Bulk Pipe devices
 2709 device          udbp
 2710 # USB Fm Radio
 2711 device          ufm
 2712 # USB temperature meter
 2713 device          ugold
 2714 # USB LED
 2715 device          uled
 2716 # Human Interface Device (anything with buttons and dials)
 2717 device          uhid
 2718 # USB keyboard
 2719 device          ukbd
 2720 # USB printer
 2721 device          ulpt
 2722 # USB mass storage driver (Requires scbus and da)
 2723 device          umass
 2724 # USB mass storage driver for device-side mode
 2725 device          usfs
 2726 # USB support for Belkin F5U109 and Magic Control Technology serial adapters
 2727 device          umct
 2728 # USB modem support
 2729 device          umodem
 2730 # USB mouse
 2731 device          ums
 2732 # USB touchpad(s)
 2733 device          atp
 2734 device          wsp
 2735 # eGalax USB touch screen
 2736 device          uep
 2737 # Diamond Rio 500 MP3 player
 2738 device          urio
 2739 #
 2740 # USB serial support
 2741 device          ucom
 2742 # USB support for 3G modem cards by Option, Novatel, Huawei and Sierra
 2743 device          u3g
 2744 # USB support for Technologies ARK3116 based serial adapters
 2745 device          uark
 2746 # USB support for Belkin F5U103 and compatible serial adapters
 2747 device          ubsa
 2748 # USB support for serial adapters based on the FT8U100AX and FT8U232AM
 2749 device          uftdi
 2750 # USB support for some Windows CE based serial communication.
 2751 device          uipaq
 2752 # USB support for Prolific PL-2303 serial adapters
 2753 device          uplcom
 2754 # USB support for Silicon Laboratories CP2101/CP2102 based USB serial adapters
 2755 device          uslcom
 2756 # USB Visor and Palm devices
 2757 device          uvisor
 2758 # USB serial support for DDI pocket's PHS
 2759 device          uvscom
 2760 #
 2761 # USB ethernet support
 2762 device          uether
 2763 # ADMtek USB ethernet. Supports the LinkSys USB100TX,
 2764 # the Billionton USB100, the Melco LU-ATX, the D-Link DSB-650TX
 2765 # and the SMC 2202USB. Also works with the ADMtek AN986 Pegasus
 2766 # eval board.
 2767 device          aue
 2768 
 2769 # ASIX Electronics AX88172 USB 2.0 ethernet driver. Used in the
 2770 # LinkSys USB200M and various other adapters.
 2771 device          axe
 2772 # ASIX Electronics AX88178A/AX88179 USB 2.0/3.0 gigabit ethernet driver.
 2773 device          axge
 2774 
 2775 #
 2776 # Devices which communicate using Ethernet over USB, particularly
 2777 # Communication Device Class (CDC) Ethernet specification. Supports
 2778 # Sharp Zaurus PDAs, some DOCSIS cable modems and so on.
 2779 device          cdce
 2780 #
 2781 # CATC USB-EL1201A USB ethernet. Supports the CATC Netmate
 2782 # and Netmate II, and the Belkin F5U111.
 2783 device          cue
 2784 #
 2785 # Kawasaki LSI ethernet. Supports the LinkSys USB10T,
 2786 # Entrega USB-NET-E45, Peracom Ethernet Adapter, the
 2787 # 3Com 3c19250, the ADS Technologies USB-10BT, the ATen UC10T,
 2788 # the Netgear EA101, the D-Link DSB-650, the SMC 2102USB
 2789 # and 2104USB, and the Corega USB-T.
 2790 device          kue
 2791 #
 2792 # RealTek RTL8150 USB to fast ethernet. Supports the Melco LUA-KTX
 2793 # and the GREEN HOUSE GH-USB100B.
 2794 device          rue
 2795 #
 2796 # Davicom DM9601E USB to fast ethernet. Supports the Corega FEther USB-TXC.
 2797 device          udav
 2798 #
 2799 # RealTek RTL8152 USB to fast ethernet.
 2800 device          ure
 2801 #
 2802 # Moschip MCS7730/MCS7840 USB to fast ethernet. Supports the Sitecom LN030.
 2803 device          mos
 2804 #
 2805 # HSxPA devices from Option N.V
 2806 device          uhso
 2807 
 2808 # Realtek RTL8188SU/RTL8191SU/RTL8192SU wireless driver
 2809 device          rsu
 2810 #
 2811 # Ralink Technology RT2501USB/RT2601USB wireless driver
 2812 device          rum
 2813 # Ralink Technology RT2700U/RT2800U/RT3000U wireless driver
 2814 device          run
 2815 #
 2816 # Atheros AR5523 wireless driver
 2817 device          uath
 2818 #
 2819 # Conexant/Intersil PrismGT wireless driver
 2820 device          upgt
 2821 #
 2822 # Ralink Technology RT2500USB wireless driver
 2823 device          ural
 2824 #
 2825 # RNDIS USB ethernet driver
 2826 device          urndis
 2827 # Realtek RTL8187B/L wireless driver
 2828 device          urtw
 2829 #
 2830 # ZyDas ZD1211/ZD1211B wireless driver
 2831 device          zyd
 2832 #
 2833 # Sierra USB wireless driver
 2834 device          usie
 2835 
 2836 # 
 2837 # debugging options for the USB subsystem
 2838 #
 2839 options         USB_DEBUG
 2840 options         U3G_DEBUG
 2841 
 2842 # options for ukbd:
 2843 options         UKBD_DFLT_KEYMAP        # specify the built-in keymap
 2844 makeoptions     UKBD_DFLT_KEYMAP=jp.pc98
 2845 
 2846 # options for uplcom:
 2847 options         UPLCOM_INTR_INTERVAL=100        # interrupt pipe interval
 2848                                                 # in milliseconds
 2849 
 2850 # options for uvscom:
 2851 options         UVSCOM_DEFAULT_OPKTSIZE=8       # default output packet size
 2852 options         UVSCOM_INTR_INTERVAL=100        # interrupt pipe interval
 2853                                                 # in milliseconds
 2854 
 2855 #####################################################################
 2856 # FireWire support
 2857 
 2858 device          firewire        # FireWire bus code
 2859 device          sbp             # SCSI over Firewire (Requires scbus and da)
 2860 device          sbp_targ        # SBP-2 Target mode  (Requires scbus and targ)
 2861 device          fwe             # Ethernet over FireWire (non-standard!)
 2862 device          fwip            # IP over FireWire (RFC2734 and RFC3146)
 2863 
 2864 #####################################################################
 2865 # dcons support (Dumb Console Device)
 2866 
 2867 device          dcons                   # dumb console driver
 2868 device          dcons_crom              # FireWire attachment
 2869 options         DCONS_BUF_SIZE=16384    # buffer size
 2870 options         DCONS_POLL_HZ=100       # polling rate
 2871 options         DCONS_FORCE_CONSOLE=0   # force to be the primary console
 2872 options         DCONS_FORCE_GDB=1       # force to be the gdb device
 2873 
 2874 #####################################################################
 2875 # crypto subsystem
 2876 #
 2877 # This is a port of the OpenBSD crypto framework.  Include this when
 2878 # configuring IPSEC and when you have a h/w crypto device to accelerate
 2879 # user applications that link to OpenSSL.
 2880 #
 2881 # Drivers are ports from OpenBSD with some simple enhancements that have
 2882 # been fed back to OpenBSD.
 2883 
 2884 device          crypto          # core crypto support
 2885 
 2886 # Only install the cryptodev device if you are running tests, or know
 2887 # specifically why you need it.  In most cases, it is not needed and
 2888 # will make things slower.
 2889 device          cryptodev       # /dev/crypto for access to h/w
 2890 
 2891 device          rndtest         # FIPS 140-2 entropy tester
 2892 
 2893 device          hifn            # Hifn 7951, 7781, etc.
 2894 options         HIFN_DEBUG      # enable debugging support: hw.hifn.debug
 2895 options         HIFN_RNDTEST    # enable rndtest support
 2896 
 2897 device          ubsec           # Broadcom 5501, 5601, 58xx
 2898 options         UBSEC_DEBUG     # enable debugging support: hw.ubsec.debug
 2899 options         UBSEC_RNDTEST   # enable rndtest support
 2900 
 2901 #####################################################################
 2902 
 2903 
 2904 #
 2905 # Embedded system options:
 2906 #
 2907 # An embedded system might want to run something other than init.
 2908 options         INIT_PATH=/sbin/init:/rescue/init
 2909 
 2910 # Debug options
 2911 options         BUS_DEBUG       # enable newbus debugging
 2912 options         DEBUG_VFS_LOCKS # enable VFS lock debugging
 2913 options         SOCKBUF_DEBUG   # enable sockbuf last record/mb tail checking
 2914 options         IFMEDIA_DEBUG   # enable debugging in net/if_media.c
 2915 
 2916 #
 2917 # Verbose SYSINIT
 2918 #
 2919 # Make the SYSINIT process performed by mi_startup() verbose.  This is very
 2920 # useful when porting to a new architecture.  If DDB is also enabled, this
 2921 # will print function names instead of addresses.
 2922 options         VERBOSE_SYSINIT
 2923 
 2924 #####################################################################
 2925 # SYSV IPC KERNEL PARAMETERS
 2926 #
 2927 # Maximum number of System V semaphores that can be used on the system at
 2928 # one time.
 2929 options         SEMMNI=11
 2930 
 2931 # Total number of semaphores system wide
 2932 options         SEMMNS=61
 2933 
 2934 # Total number of undo structures in system
 2935 options         SEMMNU=31
 2936 
 2937 # Maximum number of System V semaphores that can be used by a single process
 2938 # at one time.
 2939 options         SEMMSL=61
 2940 
 2941 # Maximum number of operations that can be outstanding on a single System V
 2942 # semaphore at one time.
 2943 options         SEMOPM=101
 2944 
 2945 # Maximum number of undo operations that can be outstanding on a single
 2946 # System V semaphore at one time.
 2947 options         SEMUME=11
 2948 
 2949 # Maximum number of shared memory pages system wide.
 2950 options         SHMALL=1025
 2951 
 2952 # Maximum size, in bytes, of a single System V shared memory region.
 2953 options         SHMMAX=(SHMMAXPGS*PAGE_SIZE+1)
 2954 options         SHMMAXPGS=1025
 2955 
 2956 # Minimum size, in bytes, of a single System V shared memory region.
 2957 options         SHMMIN=2
 2958 
 2959 # Maximum number of shared memory regions that can be used on the system
 2960 # at one time.
 2961 options         SHMMNI=33
 2962 
 2963 # Maximum number of System V shared memory regions that can be attached to
 2964 # a single process at one time.
 2965 options         SHMSEG=9
 2966 
 2967 # Set the amount of time (in seconds) the system will wait before
 2968 # rebooting automatically when a kernel panic occurs.  If set to (-1),
 2969 # the system will wait indefinitely until a key is pressed on the
 2970 # console.
 2971 options         PANIC_REBOOT_WAIT_TIME=16
 2972 
 2973 # Attempt to bypass the buffer cache and put data directly into the
 2974 # userland buffer for read operation when O_DIRECT flag is set on the
 2975 # file.  Both offset and length of the read operation must be
 2976 # multiples of the physical media sector size.
 2977 #
 2978 options         DIRECTIO
 2979 
 2980 # Specify a lower limit for the number of swap I/O buffers.  They are
 2981 # (among other things) used when bypassing the buffer cache due to
 2982 # DIRECTIO kernel option enabled and O_DIRECT flag set on file.
 2983 #
 2984 options         NSWBUF_MIN=120
 2985 
 2986 #####################################################################
 2987 
 2988 # More undocumented options for linting.
 2989 # Note that documenting these is not considered an affront.
 2990 
 2991 options         CAM_DEBUG_DELAY
 2992 
 2993 # VFS cluster debugging.
 2994 options         CLUSTERDEBUG
 2995 
 2996 options         DEBUG
 2997 
 2998 # Kernel filelock debugging.
 2999 options         LOCKF_DEBUG
 3000 
 3001 # System V compatible message queues
 3002 # Please note that the values provided here are used to test kernel
 3003 # building.  The defaults in the sources provide almost the same numbers.
 3004 # MSGSSZ must be a power of 2 between 8 and 1024.
 3005 options         MSGMNB=2049     # Max number of chars in queue
 3006 options         MSGMNI=41       # Max number of message queue identifiers
 3007 options         MSGSEG=2049     # Max number of message segments
 3008 options         MSGSSZ=16       # Size of a message segment
 3009 options         MSGTQL=41       # Max number of messages in system
 3010 
 3011 options         NBUF=512        # Number of buffer headers
 3012 
 3013 options         SCSI_NCR_DEBUG
 3014 options         SCSI_NCR_MAX_SYNC=10000
 3015 options         SCSI_NCR_MAX_WIDE=1
 3016 options         SCSI_NCR_MYADDR=7
 3017 
 3018 options         SC_DEBUG_LEVEL=5        # Syscons debug level
 3019 options         SC_RENDER_DEBUG # syscons rendering debugging
 3020 
 3021 options         VFS_BIO_DEBUG   # VFS buffer I/O debugging
 3022 
 3023 options         KSTACK_MAX_PAGES=32 # Maximum pages to give the kernel stack
 3024 options         KSTACK_USAGE_PROF
 3025 
 3026 # Adaptec Array Controller driver options
 3027 options         AAC_DEBUG       # Debugging levels:
 3028                                 # 0 - quiet, only emit warnings
 3029                                 # 1 - noisy, emit major function
 3030                                 #     points and things done
 3031                                 # 2 - extremely noisy, emit trace
 3032                                 #     items in loops, etc.
 3033 
 3034 # Resource Accounting
 3035 options         RACCT
 3036 
 3037 # Resource Limits
 3038 options         RCTL
 3039 
 3040 # Yet more undocumented options for linting.
 3041 # BKTR_ALLOC_PAGES has no effect except to cause warnings, and
 3042 # BROOKTREE_ALLOC_PAGES hasn't actually been superseded by it, since the
 3043 # driver still mostly spells this option BROOKTREE_ALLOC_PAGES.
 3044 ##options       BKTR_ALLOC_PAGES=(217*4+1)
 3045 options         BROOKTREE_ALLOC_PAGES=(217*4+1)
 3046 options         MAXFILES=999
 3047 
 3048 # Random number generator
 3049 # Only ONE of the below two may be used; they are mutually exclusive.
 3050 # If neither is present, then the Fortuna algorithm is selected.
 3051 #options        RANDOM_YARROW   # Yarrow CSPRNG (old default)
 3052 #options        RANDOM_LOADABLE # Allow the algorithm to be loaded as
 3053                                 # a module.
 3054 # Select this to allow high-rate but potentially expensive
 3055 # harvesting of Slab-Allocator entropy. In very high-rate
 3056 # situations the value of doing this is dubious at best.
 3057 options         RANDOM_ENABLE_UMA       # slab allocator
 3058 
 3059 # Module to enable execution of application via emulators like QEMU
 3060 options         IMAGACT_BINMISC
 3061 
 3062 # Intel em(4) driver
 3063 options         EM_MULTIQUEUE # Activate multiqueue features/disable MSI-X
 3064 
 3065 # zlib I/O stream support
 3066 # This enables support for compressed core dumps.
 3067 options         GZIO
 3068 
 3069 # BHND(4) drivers
 3070 options         BHND_LOGLEVEL   # Logging threshold level
 3071 
 3072 # evdev interface 
 3073 device          evdev           # input event device support
 3074 options         EVDEV_SUPPORT   # evdev support in legacy drivers
 3075 options         EVDEV_DEBUG     # enable event debug msgs
 3076 device          uinput          # install /dev/uinput cdev
 3077 options         UINPUT_DEBUG    # enable uinput debug msgs

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