2 # NOTES -- Lines that can be cut/pasted into kernel and hints configs.
4 # This file contains machine dependent kernel configuration notes. For
5 # machine independent notes, look in /sys/conf/NOTES.
10 # Enable the kernel DTrace hooks which are required to load the DTrace
16 # NOTE: introduces CDDL-licensed components into the kernel
20 #device dtrace_profile
23 #device dtrace_systrace
24 #device dtrace_prototype
28 # Alternatively include all the DTrace modules
32 #####################################################################
35 # The apic device enables the use of the I/O APIC for interrupt delivery.
36 # The apic device can be used in both UP and SMP kernels, but is required
37 # for SMP kernels. Thus, the apic device is not strictly an SMP option,
38 # but it is a prerequisite for SMP.
42 # HTT CPUs should only be used if they are enabled in the BIOS. For
43 # the ACPI case, ACPI only correctly tells us about any HTT CPUs if
44 # they are enabled. However, most HTT systems do not list HTT CPUs
45 # in the MP Table if they are enabled, thus we guess at the HTT CPUs
46 # for the MP Table case. However, we shouldn't try to guess and use
47 # these CPUs if HTT is disabled. Thus, HTT guessing is only enabled
48 # for the MP Table if the user explicitly asks for it via the
49 # MPTABLE_FORCE_HTT option. Do NOT use this option if you have HTT
50 # disabled in your BIOS.
52 # IPI_PREEMPTION instructs the kernel to preempt threads running on other
53 # CPUS if needed. Relies on the PREEMPTION option
56 device apic # I/O apic
59 options MPTABLE_FORCE_HTT # Enable HTT CPUs with the MP Table
60 options IPI_PREEMPTION
64 options COUNT_XINVLTLB_HITS # Counters for TLB events
65 options COUNT_IPIS # Per-CPU IPI interrupt counters
69 #####################################################################
73 # You must specify at least one CPU (the one you intend to run on);
74 # deleting the specification for CPUs you don't need to use may make
75 # parts of the system run faster.
78 cpu I586_CPU # aka Pentium(tm)
79 cpu I686_CPU # aka Pentium Pro(tm)
82 # Options for CPU features.
84 # CPU_ATHLON_SSE_HACK tries to enable SSE instructions when the BIOS has
85 # forgotten to enable them.
87 # CPU_BLUELIGHTNING_3X enables triple-clock mode on IBM Blue Lightning
88 # CPU if CPU supports it. The default is double-clock mode on
89 # BlueLightning CPU box.
91 # CPU_BLUELIGHTNING_FPU_OP_CACHE enables FPU operand cache on IBM
92 # BlueLightning CPU. It works only with Cyrix FPU, and this option
93 # should not be used with Intel FPU.
95 # CPU_BTB_EN enables branch target buffer on Cyrix 5x86 (NOTE 1).
97 # CPU_CYRIX_NO_LOCK enables weak locking for the entire address space
98 # of Cyrix 6x86 and 6x86MX CPUs by setting the NO_LOCK bit of CCR1.
99 # Otherwise, the NO_LOCK bit of CCR1 is cleared. (NOTE 3)
101 # CPU_DIRECT_MAPPED_CACHE sets L1 cache of Cyrix 486DLC CPU in direct
102 # mapped mode. Default is 2-way set associative mode.
104 # CPU_DISABLE_5X86_LSSER disables load store serialize (i.e., enables
105 # reorder). This option should not be used if you use memory mapped
108 # CPU_ELAN enables support for AMDs ElanSC520 CPU.
109 # CPU_ELAN_PPS enables precision timestamp code.
110 # CPU_ELAN_XTAL sets the clock crystal frequency in Hz.
112 # CPU_ENABLE_LONGRUN enables support for Transmeta Crusoe LongRun
113 # technology which allows to restrict power consumption of the CPU by
114 # using group of hw.crusoe.* sysctls.
116 # CPU_FASTER_5X86_FPU enables faster FPU exception handler.
118 # CPU_GEODE is for the SC1100 Geode embedded processor. This option
119 # is necessary because the i8254 timecounter is toast.
121 # CPU_I486_ON_386 enables CPU cache on i486 based CPU upgrade products
124 # CPU_IORT defines I/O clock delay time (NOTE 1). Default values of
125 # I/O clock delay time on Cyrix 5x86 and 6x86 are 0 and 7,respectively
128 # CPU_L2_LATENCY specifies the L2 cache latency value. This option is used
129 # only when CPU_PPRO2CELERON is defined and Mendocino Celeron is detected.
130 # The default value is 5.
132 # CPU_LOOP_EN prevents flushing the prefetch buffer if the destination
133 # of a jump is already present in the prefetch buffer on Cyrix 5x86(NOTE
136 # CPU_PPRO2CELERON enables L2 cache of Mendocino Celeron CPUs. This option
137 # is useful when you use Socket 8 to Socket 370 converter, because most Pentium
138 # Pro BIOSs do not enable L2 cache of Mendocino Celeron CPUs.
140 # CPU_RSTK_EN enables return stack on Cyrix 5x86 (NOTE 1).
142 # CPU_SOEKRIS enables support www.soekris.com hardware.
144 # CPU_SUSP_HLT enables suspend on HALT. If this option is set, CPU
145 # enters suspend mode following execution of HALT instruction.
147 # CPU_UPGRADE_HW_CACHE eliminates unneeded cache flush instruction(s).
149 # CPU_WT_ALLOC enables write allocation on Cyrix 6x86/6x86MX and AMD
152 # CYRIX_CACHE_WORKS enables CPU cache on Cyrix 486 CPUs with cache
153 # flush at hold state.
155 # CYRIX_CACHE_REALLY_WORKS enables (1) CPU cache on Cyrix 486 CPUs
156 # without cache flush at hold state, and (2) write-back CPU cache on
157 # Cyrix 6x86 whose revision < 2.7 (NOTE 2).
159 # NO_F00F_HACK disables the hack that prevents Pentiums (and ONLY
160 # Pentiums) from locking up when a LOCK CMPXCHG8B instruction is
161 # executed. This option is only needed if I586_CPU is also defined,
162 # and should be included for any non-Pentium CPU that defines it.
164 # NO_MEMORY_HOLE is an optimisation for systems with AMD K6 processors
165 # which indicates that the 15-16MB range is *definitely* not being
166 # occupied by an ISA memory hole.
168 # NOTE 1: The options, CPU_BTB_EN, CPU_LOOP_EN, CPU_IORT,
169 # CPU_LOOP_EN and CPU_RSTK_EN should not be used because of CPU bugs.
170 # These options may crash your system.
172 # NOTE 2: If CYRIX_CACHE_REALLY_WORKS is not set, CPU cache is enabled
173 # in write-through mode when revision < 2.7. If revision of Cyrix
174 # 6x86 >= 2.7, CPU cache is always enabled in write-back mode.
176 # NOTE 3: This option may cause failures for software that requires
177 # locked cycles in order to operate correctly.
179 options CPU_ATHLON_SSE_HACK
180 options CPU_BLUELIGHTNING_3X
181 options CPU_BLUELIGHTNING_FPU_OP_CACHE
183 options CPU_DIRECT_MAPPED_CACHE
184 options CPU_DISABLE_5X86_LSSER
187 options CPU_ELAN_XTAL=32768000
188 options CPU_ENABLE_LONGRUN
189 options CPU_FASTER_5X86_FPU
191 options CPU_I486_ON_386
193 options CPU_L2_LATENCY=5
195 options CPU_PPRO2CELERON
199 options CPU_UPGRADE_HW_CACHE
201 options CYRIX_CACHE_WORKS
202 options CYRIX_CACHE_REALLY_WORKS
203 #options NO_F00F_HACK
206 options NPX_DEBUG # enable npx debugging
209 # PERFMON causes the driver for Pentium/Pentium Pro performance counters
210 # to be compiled. See perfmon(4) for more information.
215 #####################################################################
219 # DEVICE_POLLING adds support for mixed interrupt-polling handling
220 # of network device drivers, which has significant benefits in terms
221 # of robustness to overloads and responsivity, as well as permitting
222 # accurate scheduling of the CPU time between kernel network processing
223 # and other activities. The drawback is a moderate (up to 1/HZ seconds)
224 # potential increase in response times.
225 # It is strongly recommended to use HZ=1000 or 2000 with DEVICE_POLLING
226 # to achieve smoother behaviour.
227 # Additionally, you can enable/disable polling at runtime with help of
228 # the ifconfig(8) utility, and select the CPU fraction reserved to
229 # userland with the sysctl variable kern.polling.user_frac
230 # (default 50, range 0..100).
232 # Not all device drivers support this mode of operation at the time of
233 # this writing. See polling(4) for more details.
235 options DEVICE_POLLING
237 # BPF_JITTER adds support for BPF just-in-time compiler.
242 #####################################################################
245 # Provide read/write access to the memory in the clock chip.
246 device nvram # Access to rtc cmos via /dev/nvram
249 #####################################################################
250 # MISCELLANEOUS DEVICES AND OPTIONS
252 device speaker #Play IBM BASIC-style noises out your speaker
253 envvar hint.speaker.0.at="isa"
254 envvar hint.speaker.0.port="0x61"
257 #####################################################################
258 # HARDWARE BUS CONFIGURATION
268 # AUTO_EOI_1 enables the `automatic EOI' feature for the master 8259A
269 # interrupt controller. This saves about 0.7-1.25 usec for each interrupt.
270 # This option breaks suspend/resume on some portables.
272 # AUTO_EOI_2 enables the `automatic EOI' feature for the slave 8259A
273 # interrupt controller. This saves about 0.7-1.25 usec for each interrupt.
274 # Automatic EOI is documented not to work for the slave with the
275 # original i8259A, but it works for some clones and some integrated
278 # MAXMEM specifies the amount of RAM on the machine; if this is not
279 # specified, FreeBSD will first read the amount of memory from the CMOS
280 # RAM, so the amount of memory will initially be limited to 64MB or 16MB
281 # depending on the BIOS. If the BIOS reports 64MB, a memory probe will
282 # then attempt to detect the installed amount of RAM. If this probe
283 # fails to detect >64MB RAM you will have to use the MAXMEM option.
284 # The amount is in kilobytes, so for a machine with 128MB of RAM, it would
285 # be 131072 (128 * 1024).
287 # BROKEN_KEYBOARD_RESET disables the use of the keyboard controller to
288 # reset the CPU for reboot. This is needed on some systems with broken
289 # keyboard controllers.
294 options MAXMEM=(128*1024)
295 #options BROKEN_KEYBOARD_RESET
305 #####################################################################
306 # HARDWARE DEVICE CONFIGURATION
308 # To include support for VGA VESA video modes
311 # Turn on extra debugging checks and output for VESA support.
314 device dpms # DPMS suspend & resume via VESA BIOS
316 # x86 real mode BIOS emulator, required by atkbdc/dpms/vesa
320 # Hints for the non-optional Numeric Processing eXtension driver.
321 envvar hint.npx.0.flags="0x0"
322 envvar hint.npx.0.irq="13"
326 # 0x01 don't use the npx registers to optimize bcopy.
327 # 0x02 don't use the npx registers to optimize bzero.
328 # 0x04 don't use the npx registers to optimize copyin or copyout.
329 # The npx registers are normally used to optimize copying and zeroing when
330 # all of the following conditions are satisfied:
331 # I586_CPU is an option
332 # the cpu is an i586 (perhaps not a Pentium)
333 # the probe for npx0 succeeds
334 # INT 16 exception handling works.
335 # Then copying and zeroing using the npx registers is normally 30-100% faster.
336 # The flags can be used to control cases where it doesn't work or is slower.
337 # Setting them at boot time using hints works right (the optimizations
338 # are not used until later in the bootstrap when npx0 is attached).
339 # Flag 0x08 automatically disables the i586 optimized routines.
348 envvar hint.psm.0.at="atkbdc"
349 envvar hint.psm.0.irq="12"
352 options PSM_HOOKRESUME #hook the system resume event, useful
354 options PSM_RESETAFTERSUSPEND #reset the device at the resume event
356 # The keyboard controller; it controls the keyboard and the PS/2 mouse.
358 envvar hint.atkbdc.0.at="isa"
359 envvar hint.atkbdc.0.port="0x060"
363 envvar hint.atkbd.0.at="atkbdc"
364 envvar hint.atkbd.0.irq="1"
367 options ATKBD_DFLT_KEYMAP # specify the built-in keymap
368 makeoptions ATKBD_DFLT_KEYMAP=fr.dvorak
371 # 0x01 Force detection of keyboard, else we always assume a keyboard
372 # 0x02 Don't reset keyboard, useful for some newer ThinkPads
373 # 0x03 Force detection and avoid reset, might help with certain
375 # 0x04 Old-style (XT) keyboard support, useful for older ThinkPads
377 # Video card driver for VGA adapters.
379 envvar hint.vga.0.at="isa"
382 # Try the following option if the mouse pointer is not drawn correctly
383 # or font does not seem to be loaded properly. May cause flicker on
385 options VGA_ALT_SEQACCESS
387 # If you can dispense with some vga driver features, you may want to
388 # use the following options to save some memory.
389 #options VGA_NO_FONT_LOADING # don't save/load font
390 #options VGA_NO_MODE_CHANGE # don't change video modes
392 # Older video cards may require this option for proper operation.
393 options VGA_SLOW_IOACCESS # do byte-wide i/o's to TS and GDC regs
395 # The following option probably won't work with the LCD displays.
396 options VGA_WIDTH90 # support 90 column modes
405 # Linear framebuffer driver for S3 VESA 1.2 cards. Works on top of VESA.
408 # 3Dfx Voodoo Graphics, Voodoo II /dev/3dfx CDEV support. This will create
409 # the /dev/3dfx0 device to work with glide implementations. This should get
410 # linked to /dev/3dfx and /dev/voodoo. Note that this is not the same as
411 # the tdfx DRI module from XFree86 and is completely unrelated.
413 # To enable Linuxulator support, one must also load linux.ko and tdfx_linux.ko.
415 device tdfx # Enable 3Dfx Voodoo support
417 options IOMMU # Enable IOMMU support
420 # ACPI support using the Intel ACPI Component Architecture reference
423 # ACPI_DEBUG enables the use of the debug.acpi.level and debug.acpi.layer
424 # kernel environment variables to select initial debugging levels for the
425 # Intel ACPICA code. (Note that the Intel code must also have USE_DEBUGGER
426 # defined when it is built).
431 # ACPI WMI Mapping driver
434 # ACPI Asus Extras (LCD backlight/brightness, video output, etc.)
437 # ACPI Fujitsu Extras (Buttons)
440 # ACPI extras driver for HP laptops
443 # ACPI extras driver for IBM laptops
446 # ACPI Panasonic Extras (LCD backlight/brightness, video output, etc.)
447 device acpi_panasonic
449 # ACPI Sony extra (LCD brightness)
452 # ACPI Toshiba Extras (LCD backlight/brightness, video output, etc.)
455 # ACPI Video Extensions (LCD backlight/brightness, video output, etc.)
458 # ACPI Docking Station
461 # ACPI ASOC ATK0110 ASUSTeK AI Booster (voltage, temperature and fan sensors)
464 # The cpufreq(4) driver provides support for non-ACPI CPU frequency control
468 # Network interfaces:
471 # bxe: Broadcom NetXtreme II (BCM5771X/BCM578XX) PCIe 10Gb Ethernet
473 # igc: Intel I225 2.5G Ethernet adapter
474 # ipw: Intel PRO/Wireless 2100 IEEE 802.11 adapter
475 # iwi: Intel PRO/Wireless 2200BG/2225BG/2915ABG IEEE 802.11 adapters
476 # Requires the iwi firmware module
477 # iwn: Intel Wireless WiFi Link 1000/105/135/2000/4965/5000/6000/6050 abgn
478 # 802.11 network adapters
479 # Requires the iwn firmware module
480 # mthca: Mellanox HCA InfiniBand
481 # mlx4ib: Mellanox ConnectX HCA InfiniBand
482 # mlx4en: Mellanox ConnectX HCA Ethernet
483 # nfe: nVidia nForce MCP on-board Ethernet Networking (BSD open source)
484 # sbni: Granch SBNI12-xx ISA and PCI adapters
485 # vmx: VMware VMXNET3 Ethernet (BSD open source)
486 # wpi: Intel 3945ABG Wireless LAN controller
487 # Requires the wpi firmware module
489 # Order for ISA/EISA devices is important here
491 device bxe # Broadcom NetXtreme II BCM5771X/BCM578XX 10GbE
492 envvar hint.cs.0.at="isa"
493 envvar hint.cs.0.port="0x300"
494 envvar hint.ed.0.at="isa"
495 envvar hint.ed.0.port="0x280"
496 envvar hint.ed.0.irq="5"
497 envvar hint.ed.0.maddr="0xd8000"
498 device igc # Intel I225 2.5G Ethernet
499 device ipw # Intel 2100 wireless NICs.
500 device iwi # Intel 2200BG/2225BG/2915ABG wireless NICs.
501 device iwn # Intel 4965/1000/5000/6000 wireless NICs.
502 # Hint for the i386-only ISA front-end of le(4).
503 envvar hint.le.0.at="isa"
504 envvar hint.le.0.port="0x280"
505 envvar hint.le.0.irq="10"
506 envvar hint.le.0.drq="0"
507 device mthca # Mellanox HCA InfiniBand
508 device mlx4 # Shared code module between IB and Ethernet
509 device mlx4ib # Mellanox ConnectX HCA InfiniBand
510 device mlx4en # Mellanox ConnectX HCA Ethernet
511 device nfe # nVidia nForce MCP on-board Ethernet
513 envvar hint.sbni.0.at="isa"
514 envvar hint.sbni.0.port="0x210"
515 envvar hint.sbni.0.irq="0xefdead"
516 envvar hint.sbni.0.flags="0"
517 device vmx # VMware VMXNET3 Ethernet
518 device wpi # Intel 3945ABG wireless NICs.
520 # IEEE 802.11 adapter firmware modules
522 # Intel PRO/Wireless 2100 firmware:
523 # ipwfw: BSS/IBSS/monitor mode firmware
524 # ipwbssfw: BSS mode firmware
525 # ipwibssfw: IBSS mode firmware
526 # ipwmonitorfw: Monitor mode firmware
527 # Intel PRO/Wireless 2200BG/2225BG/2915ABG firmware:
528 # iwifw: BSS/IBSS/monitor mode firmware
529 # iwibssfw: BSS mode firmware
530 # iwiibssfw: IBSS mode firmware
531 # iwimonitorfw: Monitor mode firmware
532 # Intel Wireless WiFi Link 4965/1000/5000/6000 series firmware:
533 # iwnfw: Single module to support all devices
534 # iwn1000fw: Specific module for the 1000 only
535 # iwn105fw: Specific module for the 105 only
536 # iwn135fw: Specific module for the 135 only
537 # iwn2000fw: Specific module for the 2000 only
538 # iwn2030fw: Specific module for the 2030 only
539 # iwn4965fw: Specific module for the 4965 only
540 # iwn5000fw: Specific module for the 5000 only
541 # iwn5150fw: Specific module for the 5150 only
542 # iwn6000fw: Specific module for the 6000 only
543 # iwn6000g2afw: Specific module for the 6000g2a only
544 # iwn6000g2bfw: Specific module for the 6000g2b only
545 # iwn6050fw: Specific module for the 6050 only
546 # wpifw: Intel 3945ABG Wireless LAN Controller firmware
572 # Non-Transparent Bridge (NTB) drivers
574 device if_ntb # Virtual NTB network interface
575 device ntb_transport # NTB packet transport driver
576 device ntb # NTB hardware interface
577 device ntb_hw_amd # AMD NTB hardware driver
578 device ntb_hw_intel # Intel NTB hardware driver
579 device ntb_hw_plx # PLX NTB hardware driver
587 # Areca 11xx and 12xx series of SATA II RAID controllers.
590 device arcmsr # Areca SATA II RAID
593 # Adaptec FSA RAID controllers, including integrated DELL controllers,
594 # the Dell PERC 2/QC and the HP NetRAID-4M
596 device aacp # SCSI Passthrough interface (optional, CAM required)
599 # Adaptec by PMC RAID controllers, Series 6/7/8 and upcoming families
600 device aacraid # Container interface, CAM required
603 # Highpoint RocketRAID 27xx.
607 # Highpoint RocketRAID 182x.
611 # Highpoint DC7280 and R750.
615 # Highpoint RocketRAID. Supports RR172x, RR222x, RR2240, RR232x, RR2340,
616 # RR2210, RR174x, RR2522, RR231x, RR230x.
620 # Highpoint RocketRaid 3xxx series SATA RAID
624 # Intel integrated Memory Controller (iMC) SMBus controller
625 # Sandybridge-Xeon, Ivybridge-Xeon, Haswell-Xeon, Broadwell-Xeon
629 # IBM (now Adaptec) ServeRAID controllers
633 # Intel C600 (Patsburg) integrated SAS controller
635 options ISCI_LOGGING # enable debugging in isci HAL
638 # Intel Volume Management Device (VMD) support
642 # PMC-Sierra SAS/SATA controller
646 # glxiic is an I2C driver for the AMD Geode LX CS5536 System Management Bus
647 # controller. Requires 'device iicbus'.
649 device glxiic # AMD Geode LX CS5536 System Management Bus
652 # glxsb is a driver for the Security Block in AMD Geode LX processors.
653 # Requires 'device crypto'.
655 device glxsb # AMD Geode LX Security Block
657 # Linux KVM paravirtualization support
658 device kvm_clock # KVM paravirtual clock driver
661 device gve # Google Virtual NIC (gVNIC) driver
664 device hyperv # HyperV drivers
665 device hvhid # HyperV HID device
667 #####################################################################
670 # Miscellaneous hardware:
672 # ipmi: Intelligent Platform Management Interface
673 # smapi: System Management Application Program Interface driver
674 # smbios: DMI/SMBIOS entry point
675 # vpd: Vital Product Data kernel interface
676 # pbio: Parallel (8255 PPI) basic I/O (mode 0) port (e.g. Advantech PCL-724)
677 # asmc: Apple System Management Controller
678 # si: Specialix International SI/XIO or SX intelligent serial card driver
679 # tpm: Trusted Platform Module
681 # Notes on the Specialix SI/XIO driver:
682 # The host card is memory, not IO mapped.
683 # The Rev 1 host cards use a 64K chunk, on a 32K boundary.
684 # The Rev 2 host cards use a 32K chunk, on a 32K boundary.
685 # The cards can use an IRQ of 11, 12 or 15.
687 # Notes on the Sony Programmable I/O controller
688 # This is a temporary driver that should someday be replaced by something
689 # that hooks into the ACPI layer. The device is hooked to the PIIX4's
690 # General Device 10 decoder, which means you have to fiddle with PCI
691 # registers to map it in, even though it is otherwise treated here as
692 # an ISA device. At the moment, the driver polls, although the device
693 # is capable of generating interrupts. It largely undocumented.
694 # The port location in the hint is where you WANT the device to be
695 # mapped. 0x10a0 seems to be traditional. At the moment the jogdial
696 # is the only thing truly supported, but apparently a fair percentage
697 # of the Vaio extra features are controlled by this device.
704 envvar hint.pbio.0.at="isa"
705 envvar hint.pbio.0.port="0x360"
708 device padlock_rng # VIA Padlock RNG
709 device rdrand_rng # Intel Bull Mountain RNG
710 device aesni # AES-NI OpenCrypto module
711 device ossl # OpenSSL OpenCrypto module
714 # Laptop/Notebook options:
717 # apm under `Miscellaneous hardware'
722 # For older notebooks that signal a powerfail condition (external
723 # power supply dropped, or battery state low) by issuing an NMI:
725 options POWERFAIL_NMI # make it beep instead of panicing
730 # Philips i2c bus support is provided by the `iicbus' device.
732 # Supported interfaces:
733 # pcf Philips PCF8584 ISA-bus controller
736 envvar hint.pcf.0.at="isa"
737 envvar hint.pcf.0.port="0x320"
738 envvar hint.pcf.0.irq="5"
741 # Hardware watchdog timers:
743 # ichwd: Intel ICH watchdog timer
744 # amdsbwd: AMD SB7xx watchdog timer
745 # viawd: VIA south bridge watchdog timer
746 # wbwd: Winbond watchdog timer
747 # itwd: ITE Super I/O watchdog timer
756 # Temperature sensors:
758 # coretemp: on-die sensor on Intel Core and newer CPUs
759 # amdtemp: on-die sensor on AMD K8/K10/K11 CPUs
765 # CPU control pseudo-device. Provides access to MSRs, CPUID info and
766 # microcode update feature.
776 # System Management Bus (SMB)
778 options ENABLE_ALART # Control alarm on Intel intpm driver
781 # Set the number of PV entries per process. Increasing this can
782 # stop panics related to heavy use of shared memory. However, that can
783 # (combined with large amounts of physical memory) cause panics at
784 # boot time due the kernel running out of VM space.
786 # If you're tweaking this, you might also want to increase the sysctls
787 # "vm.v_free_min", "vm.v_free_reserved", and "vm.v_free_target".
789 # The value below is the one more than the default.
791 options PMAP_SHPGPERPROC=201
794 # Number of initial kernel page table pages used for early bootstrap.
795 # This number should include enough pages to map the kernel, any
796 # modules or other data loaded with the kernel by the loader, and data
797 # structures allocated before the VM system is initialized such as the
798 # vm_page_t array. Each page table page maps 4MB (2MB with PAE).
803 # HID-over-I2C support
805 device iichid # HID-over-I2C support
806 options IICHID_DEBUG # Enable HID-over-I2C debug messages
807 options IICHID_SAMPLING # Workaround missing GPIO INTR support
809 #####################################################################
812 # Enable (32-bit) a.out binary support
815 #####################################################################
818 # KSTACK_PAGES is the number of memory pages to assign to the kernel
819 # stack of each thread.
821 options KSTACK_PAGES=5
823 # Enable detailed accounting by the PV entry allocator.
827 #####################################################################
829 # More undocumented options for linting.
830 # Note that documenting these are not considered an affront.
832 options KBDIO_DEBUG=2
833 options KBD_MAXRETRY=4
834 options KBD_MAXWAIT=6
835 options KBD_RESETDELAY=201
839 options TIMER_FREQ=((14318182+6)/12)
842 options VM_KMEM_SIZE_MAX
843 options VM_KMEM_SIZE_SCALE
846 #####################################################################
847 # Items broken on i386 that are generally available elsewhere
849 # Device uses bus_read_8 and friends, so can't work. Remove it from lint.