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.
11 # Enable the kernel DTrace hooks which are required to load the DTrace
17 # NOTE: introduces CDDL-licensed components into the kernel
21 #device dtrace_profile
24 #device dtrace_systrace
25 #device dtrace_prototype
29 # Alternatively include all the DTrace modules
33 #####################################################################
36 # The apic device enables the use of the I/O APIC for interrupt delivery.
37 # The apic device can be used in both UP and SMP kernels, but is required
38 # for SMP kernels. Thus, the apic device is not strictly an SMP option,
39 # but it is a prerequisite for SMP.
43 # HTT CPUs should only be used if they are enabled in the BIOS. For
44 # the ACPI case, ACPI only correctly tells us about any HTT CPUs if
45 # they are enabled. However, most HTT systems do not list HTT CPUs
46 # in the MP Table if they are enabled, thus we guess at the HTT CPUs
47 # for the MP Table case. However, we shouldn't try to guess and use
48 # these CPUs if HTT is disabled. Thus, HTT guessing is only enabled
49 # for the MP Table if the user explicitly asks for it via the
50 # MPTABLE_FORCE_HTT option. Do NOT use this option if you have HTT
51 # disabled in your BIOS.
53 # IPI_PREEMPTION instructs the kernel to preempt threads running on other
54 # CPUS if needed. Relies on the PREEMPTION option
57 device apic # I/O apic
60 options MPTABLE_FORCE_HTT # Enable HTT CPUs with the MP Table
61 options IPI_PREEMPTION
70 options COUNT_XINVLTLB_HITS # Counters for TLB events
71 options COUNT_IPIS # Per-CPU IPI interrupt counters
75 #####################################################################
79 # You must specify at least one CPU (the one you intend to run on);
80 # deleting the specification for CPUs you don't need to use may make
81 # parts of the system run faster.
84 cpu I586_CPU # aka Pentium(tm)
85 cpu I686_CPU # aka Pentium Pro(tm)
88 # Options for CPU features.
90 # CPU_ATHLON_SSE_HACK tries to enable SSE instructions when the BIOS has
91 # forgotten to enable them.
93 # CPU_BLUELIGHTNING_3X enables triple-clock mode on IBM Blue Lightning
94 # CPU if CPU supports it. The default is double-clock mode on
95 # BlueLightning CPU box.
97 # CPU_BLUELIGHTNING_FPU_OP_CACHE enables FPU operand cache on IBM
98 # BlueLightning CPU. It works only with Cyrix FPU, and this option
99 # should not be used with Intel FPU.
101 # CPU_BTB_EN enables branch target buffer on Cyrix 5x86 (NOTE 1).
103 # CPU_CYRIX_NO_LOCK enables weak locking for the entire address space
104 # of Cyrix 6x86 and 6x86MX CPUs by setting the NO_LOCK bit of CCR1.
105 # Otherwise, the NO_LOCK bit of CCR1 is cleared. (NOTE 3)
107 # CPU_DIRECT_MAPPED_CACHE sets L1 cache of Cyrix 486DLC CPU in direct
108 # mapped mode. Default is 2-way set associative mode.
110 # CPU_DISABLE_5X86_LSSER disables load store serialize (i.e., enables
111 # reorder). This option should not be used if you use memory mapped
114 # CPU_ELAN enables support for AMDs ElanSC520 CPU.
115 # CPU_ELAN_PPS enables precision timestamp code.
116 # CPU_ELAN_XTAL sets the clock crystal frequency in Hz.
118 # CPU_ENABLE_LONGRUN enables support for Transmeta Crusoe LongRun
119 # technology which allows to restrict power consumption of the CPU by
120 # using group of hw.crusoe.* sysctls.
122 # CPU_FASTER_5X86_FPU enables faster FPU exception handler.
124 # CPU_GEODE is for the SC1100 Geode embedded processor. This option
125 # is necessary because the i8254 timecounter is toast.
127 # CPU_I486_ON_386 enables CPU cache on i486 based CPU upgrade products
130 # CPU_IORT defines I/O clock delay time (NOTE 1). Default values of
131 # I/O clock delay time on Cyrix 5x86 and 6x86 are 0 and 7,respectively
134 # CPU_L2_LATENCY specifies the L2 cache latency value. This option is used
135 # only when CPU_PPRO2CELERON is defined and Mendocino Celeron is detected.
136 # The default value is 5.
138 # CPU_LOOP_EN prevents flushing the prefetch buffer if the destination
139 # of a jump is already present in the prefetch buffer on Cyrix 5x86(NOTE
142 # CPU_PPRO2CELERON enables L2 cache of Mendocino Celeron CPUs. This option
143 # is useful when you use Socket 8 to Socket 370 converter, because most Pentium
144 # Pro BIOSs do not enable L2 cache of Mendocino Celeron CPUs.
146 # CPU_RSTK_EN enables return stack on Cyrix 5x86 (NOTE 1).
148 # CPU_SOEKRIS enables support www.soekris.com hardware.
150 # CPU_SUSP_HLT enables suspend on HALT. If this option is set, CPU
151 # enters suspend mode following execution of HALT instruction.
153 # CPU_UPGRADE_HW_CACHE eliminates unneeded cache flush instruction(s).
155 # CPU_WT_ALLOC enables write allocation on Cyrix 6x86/6x86MX and AMD
158 # CYRIX_CACHE_WORKS enables CPU cache on Cyrix 486 CPUs with cache
159 # flush at hold state.
161 # CYRIX_CACHE_REALLY_WORKS enables (1) CPU cache on Cyrix 486 CPUs
162 # without cache flush at hold state, and (2) write-back CPU cache on
163 # Cyrix 6x86 whose revision < 2.7 (NOTE 2).
165 # NO_F00F_HACK disables the hack that prevents Pentiums (and ONLY
166 # Pentiums) from locking up when a LOCK CMPXCHG8B instruction is
167 # executed. This option is only needed if I586_CPU is also defined,
168 # and should be included for any non-Pentium CPU that defines it.
170 # NO_MEMORY_HOLE is an optimisation for systems with AMD K6 processors
171 # which indicates that the 15-16MB range is *definitely* not being
172 # occupied by an ISA memory hole.
174 # NOTE 1: The options, CPU_BTB_EN, CPU_LOOP_EN, CPU_IORT,
175 # CPU_LOOP_EN and CPU_RSTK_EN should not be used because of CPU bugs.
176 # These options may crash your system.
178 # NOTE 2: If CYRIX_CACHE_REALLY_WORKS is not set, CPU cache is enabled
179 # in write-through mode when revision < 2.7. If revision of Cyrix
180 # 6x86 >= 2.7, CPU cache is always enabled in write-back mode.
182 # NOTE 3: This option may cause failures for software that requires
183 # locked cycles in order to operate correctly.
185 options CPU_ATHLON_SSE_HACK
186 options CPU_BLUELIGHTNING_3X
187 options CPU_BLUELIGHTNING_FPU_OP_CACHE
189 options CPU_DIRECT_MAPPED_CACHE
190 options CPU_DISABLE_5X86_LSSER
193 options CPU_ELAN_XTAL=32768000
194 options CPU_ENABLE_LONGRUN
195 options CPU_FASTER_5X86_FPU
197 options CPU_I486_ON_386
199 options CPU_L2_LATENCY=5
201 options CPU_PPRO2CELERON
205 options CPU_UPGRADE_HW_CACHE
207 options CYRIX_CACHE_WORKS
208 options CYRIX_CACHE_REALLY_WORKS
209 #options NO_F00F_HACK
212 options NPX_DEBUG # enable npx debugging
215 # PERFMON causes the driver for Pentium/Pentium Pro performance counters
216 # to be compiled. See perfmon(4) for more information.
221 #####################################################################
225 # DEVICE_POLLING adds support for mixed interrupt-polling handling
226 # of network device drivers, which has significant benefits in terms
227 # of robustness to overloads and responsivity, as well as permitting
228 # accurate scheduling of the CPU time between kernel network processing
229 # and other activities. The drawback is a moderate (up to 1/HZ seconds)
230 # potential increase in response times.
231 # It is strongly recommended to use HZ=1000 or 2000 with DEVICE_POLLING
232 # to achieve smoother behaviour.
233 # Additionally, you can enable/disable polling at runtime with help of
234 # the ifconfig(8) utility, and select the CPU fraction reserved to
235 # userland with the sysctl variable kern.polling.user_frac
236 # (default 50, range 0..100).
238 # Not all device drivers support this mode of operation at the time of
239 # this writing. See polling(4) for more details.
241 options DEVICE_POLLING
243 # BPF_JITTER adds support for BPF just-in-time compiler.
247 # OpenFabrics Enterprise Distribution (Infiniband).
249 options OFED_DEBUG_INIT
251 # Sockets Direct Protocol
261 #####################################################################
264 # Provide read/write access to the memory in the clock chip.
265 device nvram # Access to rtc cmos via /dev/nvram
268 #####################################################################
269 # MISCELLANEOUS DEVICES AND OPTIONS
271 device speaker #Play IBM BASIC-style noises out your speaker
272 envvar hint.speaker.0.at="isa"
273 envvar hint.speaker.0.port="0x61"
276 #####################################################################
277 # HARDWARE BUS CONFIGURATION
287 # AUTO_EOI_1 enables the `automatic EOI' feature for the master 8259A
288 # interrupt controller. This saves about 0.7-1.25 usec for each interrupt.
289 # This option breaks suspend/resume on some portables.
291 # AUTO_EOI_2 enables the `automatic EOI' feature for the slave 8259A
292 # interrupt controller. This saves about 0.7-1.25 usec for each interrupt.
293 # Automatic EOI is documented not to work for for the slave with the
294 # original i8259A, but it works for some clones and some integrated
297 # MAXMEM specifies the amount of RAM on the machine; if this is not
298 # specified, FreeBSD will first read the amount of memory from the CMOS
299 # RAM, so the amount of memory will initially be limited to 64MB or 16MB
300 # depending on the BIOS. If the BIOS reports 64MB, a memory probe will
301 # then attempt to detect the installed amount of RAM. If this probe
302 # fails to detect >64MB RAM you will have to use the MAXMEM option.
303 # The amount is in kilobytes, so for a machine with 128MB of RAM, it would
304 # be 131072 (128 * 1024).
306 # BROKEN_KEYBOARD_RESET disables the use of the keyboard controller to
307 # reset the CPU for reboot. This is needed on some systems with broken
308 # keyboard controllers.
313 options MAXMEM=(128*1024)
314 #options BROKEN_KEYBOARD_RESET
324 #####################################################################
325 # HARDWARE DEVICE CONFIGURATION
327 # To include support for VGA VESA video modes
330 # Turn on extra debugging checks and output for VESA support.
333 device dpms # DPMS suspend & resume via VESA BIOS
335 # x86 real mode BIOS emulator, required by atkbdc/dpms/vesa
339 # Hints for the non-optional Numeric Processing eXtension driver.
340 envvar hint.npx.0.flags="0x0"
341 envvar hint.npx.0.irq="13"
345 # 0x01 don't use the npx registers to optimize bcopy.
346 # 0x02 don't use the npx registers to optimize bzero.
347 # 0x04 don't use the npx registers to optimize copyin or copyout.
348 # The npx registers are normally used to optimize copying and zeroing when
349 # all of the following conditions are satisfied:
350 # I586_CPU is an option
351 # the cpu is an i586 (perhaps not a Pentium)
352 # the probe for npx0 succeeds
353 # INT 16 exception handling works.
354 # Then copying and zeroing using the npx registers is normally 30-100% faster.
355 # The flags can be used to control cases where it doesn't work or is slower.
356 # Setting them at boot time using hints works right (the optimizations
357 # are not used until later in the bootstrap when npx0 is attached).
358 # Flag 0x08 automatically disables the i586 optimized routines.
367 envvar hint.psm.0.at="atkbdc"
368 envvar hint.psm.0.irq="12"
371 options PSM_HOOKRESUME #hook the system resume event, useful
373 options PSM_RESETAFTERSUSPEND #reset the device at the resume event
375 # The keyboard controller; it controls the keyboard and the PS/2 mouse.
377 envvar hint.atkbdc.0.at="isa"
378 envvar hint.atkbdc.0.port="0x060"
382 envvar hint.atkbd.0.at="atkbdc"
383 envvar hint.atkbd.0.irq="1"
386 options ATKBD_DFLT_KEYMAP # specify the built-in keymap
387 makeoptions ATKBD_DFLT_KEYMAP=fr.dvorak
390 # 0x01 Force detection of keyboard, else we always assume a keyboard
391 # 0x02 Don't reset keyboard, useful for some newer ThinkPads
392 # 0x03 Force detection and avoid reset, might help with certain
394 # 0x04 Old-style (XT) keyboard support, useful for older ThinkPads
396 # Video card driver for VGA adapters.
398 envvar hint.vga.0.at="isa"
401 # Try the following option if the mouse pointer is not drawn correctly
402 # or font does not seem to be loaded properly. May cause flicker on
404 options VGA_ALT_SEQACCESS
406 # If you can dispense with some vga driver features, you may want to
407 # use the following options to save some memory.
408 #options VGA_NO_FONT_LOADING # don't save/load font
409 #options VGA_NO_MODE_CHANGE # don't change video modes
411 # Older video cards may require this option for proper operation.
412 options VGA_SLOW_IOACCESS # do byte-wide i/o's to TS and GDC regs
414 # The following option probably won't work with the LCD displays.
415 options VGA_WIDTH90 # support 90 column modes
424 # Linear framebuffer driver for S3 VESA 1.2 cards. Works on top of VESA.
427 # 3Dfx Voodoo Graphics, Voodoo II /dev/3dfx CDEV support. This will create
428 # the /dev/3dfx0 device to work with glide implementations. This should get
429 # linked to /dev/3dfx and /dev/voodoo. Note that this is not the same as
430 # the tdfx DRI module from XFree86 and is completely unrelated.
432 # To enable Linuxulator support, one must also load linux.ko and tdfx_linux.ko.
434 device tdfx # Enable 3Dfx Voodoo support
436 options IOMMU # Enable IOMMU support
439 # ACPI support using the Intel ACPI Component Architecture reference
442 # ACPI_DEBUG enables the use of the debug.acpi.level and debug.acpi.layer
443 # kernel environment variables to select initial debugging levels for the
444 # Intel ACPICA code. (Note that the Intel code must also have USE_DEBUGGER
445 # defined when it is built).
450 # ACPI WMI Mapping driver
453 # ACPI Asus Extras (LCD backlight/brightness, video output, etc.)
456 # ACPI Fujitsu Extras (Buttons)
459 # ACPI extras driver for HP laptops
462 # ACPI extras driver for IBM laptops
465 # ACPI Panasonic Extras (LCD backlight/brightness, video output, etc.)
466 device acpi_panasonic
468 # ACPI Sony extra (LCD brightness)
471 # ACPI Toshiba Extras (LCD backlight/brightness, video output, etc.)
474 # ACPI Video Extensions (LCD backlight/brightness, video output, etc.)
477 # ACPI Docking Station
480 # ACPI ASOC ATK0110 ASUSTeK AI Booster (voltage, temperature and fan sensors)
483 # The cpufreq(4) driver provides support for non-ACPI CPU frequency control
487 # Network interfaces:
490 # bxe: Broadcom NetXtreme II (BCM5771X/BCM578XX) PCIe 10Gb Ethernet
492 # ce: Cronyx Tau-PCI/32 sync single/dual port G.703/E1 serial adaptor
493 # with 32 HDLC subchannels, requires NETGRAPH
494 # igc: Intel I225 2.5G Ethernet adapter
495 # ipw: Intel PRO/Wireless 2100 IEEE 802.11 adapter
496 # iwi: Intel PRO/Wireless 2200BG/2225BG/2915ABG IEEE 802.11 adapters
497 # Requires the iwi firmware module
498 # iwn: Intel Wireless WiFi Link 1000/105/135/2000/4965/5000/6000/6050 abgn
499 # 802.11 network adapters
500 # Requires the iwn firmware module
501 # mthca: Mellanox HCA InfiniBand
502 # mlx4ib: Mellanox ConnectX HCA InfiniBand
503 # mlx4en: Mellanox ConnectX HCA Ethernet
504 # nfe: nVidia nForce MCP on-board Ethernet Networking (BSD open source)
505 # sbni: Granch SBNI12-xx ISA and PCI adapters
506 # vmx: VMware VMXNET3 Ethernet (BSD open source)
507 # wpi: Intel 3945ABG Wireless LAN controller
508 # Requires the wpi firmware module
510 # Order for ISA/EISA devices is important here
512 device bxe # Broadcom NetXtreme II BCM5771X/BCM578XX 10GbE
514 envvar hint.cs.0.at="isa"
515 envvar hint.cs.0.port="0x300"
519 envvar hint.ed.0.at="isa"
520 envvar hint.ed.0.port="0x280"
521 envvar hint.ed.0.irq="5"
522 envvar hint.ed.0.maddr="0xd8000"
523 device igc # Intel I225 2.5G Ethernet
524 device ipw # Intel 2100 wireless NICs.
525 device iwi # Intel 2200BG/2225BG/2915ABG wireless NICs.
526 device iwn # Intel 4965/1000/5000/6000 wireless NICs.
527 # Hint for the i386-only ISA front-end of le(4).
528 envvar hint.le.0.at="isa"
529 envvar hint.le.0.port="0x280"
530 envvar hint.le.0.irq="10"
531 envvar hint.le.0.drq="0"
532 device mthca # Mellanox HCA InfiniBand
533 device mlx4 # Shared code module between IB and Ethernet
534 device mlx4ib # Mellanox ConnectX HCA InfiniBand
535 device mlx4en # Mellanox ConnectX HCA Ethernet
536 device nfe # nVidia nForce MCP on-board Ethernet
538 envvar hint.sbni.0.at="isa"
539 envvar hint.sbni.0.port="0x210"
540 envvar hint.sbni.0.irq="0xefdead"
541 envvar hint.sbni.0.flags="0"
542 device vmx # VMware VMXNET3 Ethernet
543 device wpi # Intel 3945ABG wireless NICs.
545 # IEEE 802.11 adapter firmware modules
547 # Intel PRO/Wireless 2100 firmware:
548 # ipwfw: BSS/IBSS/monitor mode firmware
549 # ipwbssfw: BSS mode firmware
550 # ipwibssfw: IBSS mode firmware
551 # ipwmonitorfw: Monitor mode firmware
552 # Intel PRO/Wireless 2200BG/2225BG/2915ABG firmware:
553 # iwifw: BSS/IBSS/monitor mode firmware
554 # iwibssfw: BSS mode firmware
555 # iwiibssfw: IBSS mode firmware
556 # iwimonitorfw: Monitor mode firmware
557 # Intel Wireless WiFi Link 4965/1000/5000/6000 series firmware:
558 # iwnfw: Single module to support all devices
559 # iwn1000fw: Specific module for the 1000 only
560 # iwn105fw: Specific module for the 105 only
561 # iwn135fw: Specific module for the 135 only
562 # iwn2000fw: Specific module for the 2000 only
563 # iwn2030fw: Specific module for the 2030 only
564 # iwn4965fw: Specific module for the 4965 only
565 # iwn5000fw: Specific module for the 5000 only
566 # iwn5150fw: Specific module for the 5150 only
567 # iwn6000fw: Specific module for the 6000 only
568 # iwn6000g2afw: Specific module for the 6000g2a only
569 # iwn6000g2bfw: Specific module for the 6000g2b only
570 # iwn6050fw: Specific module for the 6050 only
571 # wpifw: Intel 3945ABG Wireless LAN Controller firmware
597 # Non-Transparent Bridge (NTB) drivers
599 device if_ntb # Virtual NTB network interface
600 device ntb_transport # NTB packet transport driver
601 device ntb # NTB hardware interface
602 device ntb_hw_amd # AMD NTB hardware driver
603 device ntb_hw_intel # Intel NTB hardware driver
604 device ntb_hw_plx # PLX NTB hardware driver
612 # Areca 11xx and 12xx series of SATA II RAID controllers.
615 device arcmsr # Areca SATA II RAID
618 # 3ware 9000 series PATA/SATA RAID controller driver and options.
619 # The driver is implemented as a SIM, and so, needs the CAM infrastructure.
621 options TWA_DEBUG # 0-10; 10 prints the most messages.
622 device twa # 3ware 9000 series PATA/SATA RAID
625 # Adaptec FSA RAID controllers, including integrated DELL controllers,
626 # the Dell PERC 2/QC and the HP NetRAID-4M
628 device aacp # SCSI Passthrough interface (optional, CAM required)
631 # Adaptec by PMC RAID controllers, Series 6/7/8 and upcoming families
632 device aacraid # Container interface, CAM required
635 # Highpoint RocketRAID 27xx.
639 # Highpoint RocketRAID 182x.
643 # Highpoint DC7280 and R750.
647 # Highpoint RocketRAID. Supports RR172x, RR222x, RR2240, RR232x, RR2340,
648 # RR2210, RR174x, RR2522, RR231x, RR230x.
652 # Highpoint RocketRaid 3xxx series SATA RAID
656 # Intel integrated Memory Controller (iMC) SMBus controller
657 # Sandybridge-Xeon, Ivybridge-Xeon, Haswell-Xeon, Broadwell-Xeon
661 # IBM (now Adaptec) ServeRAID controllers
665 # Intel C600 (Patsburg) integrated SAS controller
667 options ISCI_LOGGING # enable debugging in isci HAL
670 # NVM Express (NVMe) support
671 device nvme # base NVMe driver
672 device nvd # expose NVMe namespaces as disks, depends on nvme
675 # Intel Volume Management Device (VMD) support
679 # PMC-Sierra SAS/SATA controller
682 # SafeNet crypto driver: can be moved to the MI NOTES as soon as
683 # it's tested on a big-endian machine
685 device safe # SafeNet 1141
686 options SAFE_DEBUG # enable debugging support: hw.safe.debug
687 options SAFE_RNDTEST # enable rndtest support
690 # glxiic is an I2C driver for the AMD Geode LX CS5536 System Management Bus
691 # controller. Requires 'device iicbus'.
693 device glxiic # AMD Geode LX CS5536 System Management Bus
696 # glxsb is a driver for the Security Block in AMD Geode LX processors.
697 # Requires 'device crypto'.
699 device glxsb # AMD Geode LX Security Block
704 # The virtio entry provides a generic bus for use by the device drivers.
705 # It must be combined with an interface that communicates with the host.
706 # Multiple such interfaces defined by the VirtIO specification. FreeBSD
707 # only has support for PCI. Therefore, virtio_pci must be statically
708 # compiled in or loaded as a module for the device drivers to function.
710 device virtio # Generic VirtIO bus (required)
711 device virtio_pci # VirtIO PCI Interface
712 device vtnet # VirtIO Ethernet device
713 device virtio_blk # VirtIO Block device
714 device virtio_scsi # VirtIO SCSI device
715 device virtio_balloon # VirtIO Memory Balloon device
716 device virtio_random # VirtIO Entropy device
717 device virtio_console # VirtIO Console device
719 # Linux KVM paravirtualization support
720 device kvm_clock # KVM paravirtual clock driver
723 device hyperv # HyperV drivers
725 #####################################################################
728 # Miscellaneous hardware:
730 # ipmi: Intelligent Platform Management Interface
731 # smapi: System Management Application Program Interface driver
732 # smbios: DMI/SMBIOS entry point
733 # vpd: Vital Product Data kernel interface
734 # pbio: Parallel (8255 PPI) basic I/O (mode 0) port (e.g. Advantech PCL-724)
735 # asmc: Apple System Management Controller
736 # si: Specialix International SI/XIO or SX intelligent serial card driver
737 # tpm: Trusted Platform Module
739 # Notes on the Specialix SI/XIO driver:
740 # The host card is memory, not IO mapped.
741 # The Rev 1 host cards use a 64K chunk, on a 32K boundary.
742 # The Rev 2 host cards use a 32K chunk, on a 32K boundary.
743 # The cards can use an IRQ of 11, 12 or 15.
745 # Notes on the Sony Programmable I/O controller
746 # This is a temporary driver that should someday be replaced by something
747 # that hooks into the ACPI layer. The device is hooked to the PIIX4's
748 # General Device 10 decoder, which means you have to fiddle with PCI
749 # registers to map it in, even though it is otherwise treated here as
750 # an ISA device. At the moment, the driver polls, although the device
751 # is capable of generating interrupts. It largely undocumented.
752 # The port location in the hint is where you WANT the device to be
753 # mapped. 0x10a0 seems to be traditional. At the moment the jogdial
754 # is the only thing truly supported, but apparently a fair percentage
755 # of the Vaio extra features are controlled by this device.
762 envvar hint.pbio.0.at="isa"
763 envvar hint.pbio.0.port="0x360"
766 device padlock_rng # VIA Padlock RNG
767 device rdrand_rng # Intel Bull Mountain RNG
768 device aesni # AES-NI OpenCrypto module
769 device ossl # OpenSSL OpenCrypto module
772 # Laptop/Notebook options:
775 # apm under `Miscellaneous hardware'
780 # For older notebooks that signal a powerfail condition (external
781 # power supply dropped, or battery state low) by issuing an NMI:
783 options POWERFAIL_NMI # make it beep instead of panicing
788 # Philips i2c bus support is provided by the `iicbus' device.
790 # Supported interfaces:
791 # pcf Philips PCF8584 ISA-bus controller
794 envvar hint.pcf.0.at="isa"
795 envvar hint.pcf.0.port="0x320"
796 envvar hint.pcf.0.irq="5"
799 # Hardware watchdog timers:
801 # ichwd: Intel ICH watchdog timer
802 # amdsbwd: AMD SB7xx watchdog timer
803 # viawd: VIA south bridge watchdog timer
804 # wbwd: Winbond watchdog timer
805 # itwd: ITE Super I/O watchdog timer
814 # Temperature sensors:
816 # coretemp: on-die sensor on Intel Core and newer CPUs
817 # amdtemp: on-die sensor on AMD K8/K10/K11 CPUs
823 # CPU control pseudo-device. Provides access to MSRs, CPUID info and
824 # microcode update feature.
834 # System Management Bus (SMB)
836 options ENABLE_ALART # Control alarm on Intel intpm driver
839 # Set the number of PV entries per process. Increasing this can
840 # stop panics related to heavy use of shared memory. However, that can
841 # (combined with large amounts of physical memory) cause panics at
842 # boot time due the kernel running out of VM space.
844 # If you're tweaking this, you might also want to increase the sysctls
845 # "vm.v_free_min", "vm.v_free_reserved", and "vm.v_free_target".
847 # The value below is the one more than the default.
849 options PMAP_SHPGPERPROC=201
852 # Number of initial kernel page table pages used for early bootstrap.
853 # This number should include enough pages to map the kernel, any
854 # modules or other data loaded with the kernel by the loader, and data
855 # structures allocated before the VM system is initialized such as the
856 # vm_page_t array. Each page table page maps 4MB (2MB with PAE).
861 # HID-over-I2C support
863 device iichid # HID-over-I2C support
864 options IICHID_DEBUG # Enable HID-over-I2C debug messages
865 options IICHID_SAMPLING # Workaround missing GPIO INTR support
867 #####################################################################
870 # Enable (32-bit) a.out binary support
873 #####################################################################
876 # KSTACK_PAGES is the number of memory pages to assign to the kernel
877 # stack of each thread.
879 options KSTACK_PAGES=5
881 # Enable detailed accounting by the PV entry allocator.
885 #####################################################################
887 # More undocumented options for linting.
888 # Note that documenting these are not considered an affront.
890 options FB_INSTALL_CDEV # install a CDEV entry in /dev
892 options KBDIO_DEBUG=2
893 options KBD_MAXRETRY=4
894 options KBD_MAXWAIT=6
895 options KBD_RESETDELAY=201
899 options TIMER_FREQ=((14318182+6)/12)
902 options VM_KMEM_SIZE_MAX
903 options VM_KMEM_SIZE_SCALE