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 # We want LINT to cover profiling as well.
15 # Enable the kernel DTrace hooks which are required to load the DTrace
21 # NOTE: introduces CDDL-licensed components into the kernel
25 #device dtrace_profile
28 #device dtrace_systrace
29 #device dtrace_prototype
33 # Alternatively include all the DTrace modules
37 #####################################################################
40 # The apic device enables the use of the I/O APIC for interrupt delivery.
41 # The apic device can be used in both UP and SMP kernels, but is required
42 # for SMP kernels. Thus, the apic device is not strictly an SMP option,
43 # but it is a prerequisite for SMP.
47 # HTT CPUs should only be used if they are enabled in the BIOS. For
48 # the ACPI case, ACPI only correctly tells us about any HTT CPUs if
49 # they are enabled. However, most HTT systems do not list HTT CPUs
50 # in the MP Table if they are enabled, thus we guess at the HTT CPUs
51 # for the MP Table case. However, we shouldn't try to guess and use
52 # these CPUs if HTT is disabled. Thus, HTT guessing is only enabled
53 # for the MP Table if the user explicitly asks for it via the
54 # MPTABLE_FORCE_HTT option. Do NOT use this option if you have HTT
55 # disabled in your BIOS.
57 # IPI_PREEMPTION instructs the kernel to preempt threads running on other
58 # CPUS if needed. Relies on the PREEMPTION option
61 device apic # I/O apic
64 options MPTABLE_FORCE_HTT # Enable HTT CPUs with the MP Table
65 options IPI_PREEMPTION
74 options COUNT_XINVLTLB_HITS # Counters for TLB events
75 options COUNT_IPIS # Per-CPU IPI interrupt counters
79 #####################################################################
83 # You must specify at least one CPU (the one you intend to run on);
84 # deleting the specification for CPUs you don't need to use may make
85 # parts of the system run faster.
88 cpu I586_CPU # aka Pentium(tm)
89 cpu I686_CPU # aka Pentium Pro(tm)
92 # Options for CPU features.
94 # CPU_ATHLON_SSE_HACK tries to enable SSE instructions when the BIOS has
95 # forgotten to enable them.
97 # CPU_BLUELIGHTNING_3X enables triple-clock mode on IBM Blue Lightning
98 # CPU if CPU supports it. The default is double-clock mode on
99 # BlueLightning CPU box.
101 # CPU_BLUELIGHTNING_FPU_OP_CACHE enables FPU operand cache on IBM
102 # BlueLightning CPU. It works only with Cyrix FPU, and this option
103 # should not be used with Intel FPU.
105 # CPU_BTB_EN enables branch target buffer on Cyrix 5x86 (NOTE 1).
107 # CPU_CYRIX_NO_LOCK enables weak locking for the entire address space
108 # of Cyrix 6x86 and 6x86MX CPUs by setting the NO_LOCK bit of CCR1.
109 # Otherwise, the NO_LOCK bit of CCR1 is cleared. (NOTE 3)
111 # CPU_DIRECT_MAPPED_CACHE sets L1 cache of Cyrix 486DLC CPU in direct
112 # mapped mode. Default is 2-way set associative mode.
114 # CPU_DISABLE_5X86_LSSER disables load store serialize (i.e., enables
115 # reorder). This option should not be used if you use memory mapped
118 # CPU_ELAN enables support for AMDs ElanSC520 CPU.
119 # CPU_ELAN_PPS enables precision timestamp code.
120 # CPU_ELAN_XTAL sets the clock crystal frequency in Hz.
122 # CPU_ENABLE_LONGRUN enables support for Transmeta Crusoe LongRun
123 # technology which allows to restrict power consumption of the CPU by
124 # using group of hw.crusoe.* sysctls.
126 # CPU_FASTER_5X86_FPU enables faster FPU exception handler.
128 # CPU_GEODE is for the SC1100 Geode embedded processor. This option
129 # is necessary because the i8254 timecounter is toast.
131 # CPU_I486_ON_386 enables CPU cache on i486 based CPU upgrade products
134 # CPU_IORT defines I/O clock delay time (NOTE 1). Default values of
135 # I/O clock delay time on Cyrix 5x86 and 6x86 are 0 and 7,respectively
138 # CPU_L2_LATENCY specifies the L2 cache latency value. This option is used
139 # only when CPU_PPRO2CELERON is defined and Mendocino Celeron is detected.
140 # The default value is 5.
142 # CPU_LOOP_EN prevents flushing the prefetch buffer if the destination
143 # of a jump is already present in the prefetch buffer on Cyrix 5x86(NOTE
146 # CPU_PPRO2CELERON enables L2 cache of Mendocino Celeron CPUs. This option
147 # is useful when you use Socket 8 to Socket 370 converter, because most Pentium
148 # Pro BIOSs do not enable L2 cache of Mendocino Celeron CPUs.
150 # CPU_RSTK_EN enables return stack on Cyrix 5x86 (NOTE 1).
152 # CPU_SOEKRIS enables support www.soekris.com hardware.
154 # CPU_SUSP_HLT enables suspend on HALT. If this option is set, CPU
155 # enters suspend mode following execution of HALT instruction.
157 # CPU_UPGRADE_HW_CACHE eliminates unneeded cache flush instruction(s).
159 # CPU_WT_ALLOC enables write allocation on Cyrix 6x86/6x86MX and AMD
162 # CYRIX_CACHE_WORKS enables CPU cache on Cyrix 486 CPUs with cache
163 # flush at hold state.
165 # CYRIX_CACHE_REALLY_WORKS enables (1) CPU cache on Cyrix 486 CPUs
166 # without cache flush at hold state, and (2) write-back CPU cache on
167 # Cyrix 6x86 whose revision < 2.7 (NOTE 2).
169 # NO_F00F_HACK disables the hack that prevents Pentiums (and ONLY
170 # Pentiums) from locking up when a LOCK CMPXCHG8B instruction is
171 # executed. This option is only needed if I586_CPU is also defined,
172 # and should be included for any non-Pentium CPU that defines it.
174 # NO_MEMORY_HOLE is an optimisation for systems with AMD K6 processors
175 # which indicates that the 15-16MB range is *definitely* not being
176 # occupied by an ISA memory hole.
178 # NOTE 1: The options, CPU_BTB_EN, CPU_LOOP_EN, CPU_IORT,
179 # CPU_LOOP_EN and CPU_RSTK_EN should not be used because of CPU bugs.
180 # These options may crash your system.
182 # NOTE 2: If CYRIX_CACHE_REALLY_WORKS is not set, CPU cache is enabled
183 # in write-through mode when revision < 2.7. If revision of Cyrix
184 # 6x86 >= 2.7, CPU cache is always enabled in write-back mode.
186 # NOTE 3: This option may cause failures for software that requires
187 # locked cycles in order to operate correctly.
189 options CPU_ATHLON_SSE_HACK
190 options CPU_BLUELIGHTNING_3X
191 options CPU_BLUELIGHTNING_FPU_OP_CACHE
193 options CPU_DIRECT_MAPPED_CACHE
194 options CPU_DISABLE_5X86_LSSER
197 options CPU_ELAN_XTAL=32768000
198 options CPU_ENABLE_LONGRUN
199 options CPU_FASTER_5X86_FPU
201 options CPU_I486_ON_386
203 options CPU_L2_LATENCY=5
205 options CPU_PPRO2CELERON
209 options CPU_UPGRADE_HW_CACHE
211 options CYRIX_CACHE_WORKS
212 options CYRIX_CACHE_REALLY_WORKS
213 #options NO_F00F_HACK
216 options NPX_DEBUG # enable npx debugging
219 # PERFMON causes the driver for Pentium/Pentium Pro performance counters
220 # to be compiled. See perfmon(4) for more information.
225 # XBOX causes the kernel to be bootable on the Microsoft XBox console system.
226 # The resulting kernel will auto-detect whether it is being booted on a XBox,
227 # so kernels compiled with this option will also work on an ordinary PC.
228 # This option require I686_CPU.
230 # xboxfb includes support for the XBox frame buffer device. It is fully USB-
231 # keyboard aware, and will only be used if an xbox is detected. This option
232 # (obviously) requires XBOX support in your kernel.
234 # NOTE: xboxfb currently conflicts with syscons(4); if you have an XBOX and
235 # include both in your kernel; you will not get any video output. Ordinary
236 # PC's do not suffer from this.
242 #####################################################################
246 # DEVICE_POLLING adds support for mixed interrupt-polling handling
247 # of network device drivers, which has significant benefits in terms
248 # of robustness to overloads and responsivity, as well as permitting
249 # accurate scheduling of the CPU time between kernel network processing
250 # and other activities. The drawback is a moderate (up to 1/HZ seconds)
251 # potential increase in response times.
252 # It is strongly recommended to use HZ=1000 or 2000 with DEVICE_POLLING
253 # to achieve smoother behaviour.
254 # Additionally, you can enable/disable polling at runtime with help of
255 # the ifconfig(8) utility, and select the CPU fraction reserved to
256 # userland with the sysctl variable kern.polling.user_frac
257 # (default 50, range 0..100).
259 # Not all device drivers support this mode of operation at the time of
260 # this writing. See polling(4) for more details.
262 options DEVICE_POLLING
264 # BPF_JITTER adds support for BPF just-in-time compiler.
268 # OpenFabrics Enterprise Distribution (Infiniband).
270 options OFED_DEBUG_INIT
272 # Sockets Direct Protocol
282 #####################################################################
285 # Provide read/write access to the memory in the clock chip.
286 device nvram # Access to rtc cmos via /dev/nvram
289 #####################################################################
290 # MISCELLANEOUS DEVICES AND OPTIONS
292 device speaker #Play IBM BASIC-style noises out your speaker
293 hint.speaker.0.at="isa"
294 hint.speaker.0.port="0x61"
295 device gzip #Exec gzipped a.out's. REQUIRES COMPAT_AOUT!
296 device apm_saver # Requires APM
299 #####################################################################
300 # HARDWARE BUS CONFIGURATION
310 # AUTO_EOI_1 enables the `automatic EOI' feature for the master 8259A
311 # interrupt controller. This saves about 0.7-1.25 usec for each interrupt.
312 # This option breaks suspend/resume on some portables.
314 # AUTO_EOI_2 enables the `automatic EOI' feature for the slave 8259A
315 # interrupt controller. This saves about 0.7-1.25 usec for each interrupt.
316 # Automatic EOI is documented not to work for for the slave with the
317 # original i8259A, but it works for some clones and some integrated
320 # MAXMEM specifies the amount of RAM on the machine; if this is not
321 # specified, FreeBSD will first read the amount of memory from the CMOS
322 # RAM, so the amount of memory will initially be limited to 64MB or 16MB
323 # depending on the BIOS. If the BIOS reports 64MB, a memory probe will
324 # then attempt to detect the installed amount of RAM. If this probe
325 # fails to detect >64MB RAM you will have to use the MAXMEM option.
326 # The amount is in kilobytes, so for a machine with 128MB of RAM, it would
327 # be 131072 (128 * 1024).
329 # BROKEN_KEYBOARD_RESET disables the use of the keyboard controller to
330 # reset the CPU for reboot. This is needed on some systems with broken
331 # keyboard controllers.
336 options MAXMEM=(128*1024)
337 #options BROKEN_KEYBOARD_RESET
347 #####################################################################
348 # HARDWARE DEVICE CONFIGURATION
350 # To include support for VGA VESA video modes
353 # Turn on extra debugging checks and output for VESA support.
356 device dpms # DPMS suspend & resume via VESA BIOS
358 # x86 real mode BIOS emulator, required by atkbdc/dpms/vesa
362 # Hints for the non-optional Numeric Processing eXtension driver.
363 hint.npx.0.flags="0x0"
368 # 0x01 don't use the npx registers to optimize bcopy.
369 # 0x02 don't use the npx registers to optimize bzero.
370 # 0x04 don't use the npx registers to optimize copyin or copyout.
371 # The npx registers are normally used to optimize copying and zeroing when
372 # all of the following conditions are satisfied:
373 # I586_CPU is an option
374 # the cpu is an i586 (perhaps not a Pentium)
375 # the probe for npx0 succeeds
376 # INT 16 exception handling works.
377 # Then copying and zeroing using the npx registers is normally 30-100% faster.
378 # The flags can be used to control cases where it doesn't work or is slower.
379 # Setting them at boot time using hints works right (the optimizations
380 # are not used until later in the bootstrap when npx0 is attached).
381 # Flag 0x08 automatically disables the i586 optimized routines.
390 hint.psm.0.at="atkbdc"
394 options PSM_HOOKRESUME #hook the system resume event, useful
396 options PSM_RESETAFTERSUSPEND #reset the device at the resume event
398 # The keyboard controller; it controls the keyboard and the PS/2 mouse.
400 hint.atkbdc.0.at="isa"
401 hint.atkbdc.0.port="0x060"
405 hint.atkbd.0.at="atkbdc"
409 options ATKBD_DFLT_KEYMAP # specify the built-in keymap
410 makeoptions ATKBD_DFLT_KEYMAP=fr.dvorak
413 # 0x01 Force detection of keyboard, else we always assume a keyboard
414 # 0x02 Don't reset keyboard, useful for some newer ThinkPads
415 # 0x03 Force detection and avoid reset, might help with certain
417 # 0x04 Old-style (XT) keyboard support, useful for older ThinkPads
419 # Video card driver for VGA adapters.
424 # Try the following option if the mouse pointer is not drawn correctly
425 # or font does not seem to be loaded properly. May cause flicker on
427 options VGA_ALT_SEQACCESS
429 # If you can dispense with some vga driver features, you may want to
430 # use the following options to save some memory.
431 #options VGA_NO_FONT_LOADING # don't save/load font
432 #options VGA_NO_MODE_CHANGE # don't change video modes
434 # Older video cards may require this option for proper operation.
435 options VGA_SLOW_IOACCESS # do byte-wide i/o's to TS and GDC regs
437 # The following option probably won't work with the LCD displays.
438 options VGA_WIDTH90 # support 90 column modes
446 # Linear framebuffer driver for S3 VESA 1.2 cards. Works on top of VESA.
449 # 3Dfx Voodoo Graphics, Voodoo II /dev/3dfx CDEV support. This will create
450 # the /dev/3dfx0 device to work with glide implementations. This should get
451 # linked to /dev/3dfx and /dev/voodoo. Note that this is not the same as
452 # the tdfx DRI module from XFree86 and is completely unrelated.
454 # To enable Linuxulator support, one must also include COMPAT_LINUX in the
455 # config as well. The other option is to load both as modules.
457 device tdfx # Enable 3Dfx Voodoo support
458 device tdfx_linux # Enable Linuxulator support
461 # ACPI support using the Intel ACPI Component Architecture reference
464 # ACPI_DEBUG enables the use of the debug.acpi.level and debug.acpi.layer
465 # kernel environment variables to select initial debugging levels for the
466 # Intel ACPICA code. (Note that the Intel code must also have USE_DEBUGGER
467 # defined when it is built).
473 # ACPI WMI Mapping driver
476 # ACPI Asus Extras (LCD backlight/brightness, video output, etc.)
479 # ACPI Fujitsu Extras (Buttons)
482 # ACPI extras driver for HP laptops
485 # ACPI extras driver for IBM laptops
488 # ACPI Panasonic Extras (LCD backlight/brightness, video output, etc.)
489 device acpi_panasonic
491 # ACPI Sony extra (LCD brightness)
494 # ACPI Toshiba Extras (LCD backlight/brightness, video output, etc.)
497 # ACPI Video Extensions (LCD backlight/brightness, video output, etc.)
500 # ACPI Docking Station
503 # ACPI ASOC ATK0110 ASUSTeK AI Booster (voltage, temperature and fan sensors)
506 # The cpufreq(4) driver provides support for non-ACPI CPU frequency control
509 # Direct Rendering modules for 3D acceleration.
510 device drm # DRM core module required by DRM drivers
511 device mach64drm # ATI Rage Pro, Rage Mobility P/M, Rage XL
512 device mgadrm # AGP Matrox G200, G400, G450, G550
513 device r128drm # ATI Rage 128
514 device savagedrm # S3 Savage3D, Savage4
515 device sisdrm # SiS 300/305, 540, 630
516 device tdfxdrm # 3dfx Voodoo 3/4/5 and Banshee
518 options DRM_DEBUG # Include debug printfs (slow)
521 # mse: Logitech and ATI InPort bus mouse ports
525 hint.mse.0.port="0x23c"
529 # Network interfaces:
532 # bxe: Broadcom NetXtreme II (BCM5771X/BCM578XX) PCIe 10Gb Ethernet
534 # ce: Cronyx Tau-PCI/32 sync single/dual port G.703/E1 serial adaptor
535 # with 32 HDLC subchannels (requires sppp (default), or NETGRAPH if
536 # NETGRAPH_CRONYX is configured)
537 # cp: Cronyx Tau-PCI sync single/dual/four port
538 # V.35/RS-232/RS-530/RS-449/X.21/G.703/E1/E3/T3/STS-1
539 # serial adaptor (requires sppp (default), or NETGRAPH if
540 # NETGRAPH_CRONYX is configured)
541 # cs: IBM Etherjet and other Crystal Semi CS89x0-based adapters
542 # ctau: Cronyx Tau sync dual port V.35/RS-232/RS-530/RS-449/X.21/G.703/E1
543 # serial adaptor (requires sppp (default), or NETGRAPH if
544 # NETGRAPH_CRONYX is configured)
545 # ed: Western Digital and SMC 80xx; Novell NE1000 and NE2000; 3Com 3C503
546 # HP PC Lan+, various PC Card devices
548 # ie: AT&T StarLAN 10 and EN100; 3Com 3C507; unknown NI5210;
550 # ipw: Intel PRO/Wireless 2100 IEEE 802.11 adapter
551 # iwi: Intel PRO/Wireless 2200BG/2225BG/2915ABG IEEE 802.11 adapters
552 # Requires the iwi firmware module
553 # iwn: Intel Wireless WiFi Link 1000/105/135/2000/4965/5000/6000/6050 abgn
554 # 802.11 network adapters
555 # Requires the iwn firmware module
556 # mlx4ib: Mellanox ConnectX HCA InfiniBand
557 # mlx4en: Mellanox ConnectX HCA Ethernet
558 # mthca: Mellanox HCA InfiniBand
559 # nfe: nVidia nForce MCP on-board Ethernet Networking (BSD open source)
560 # sbni: Granch SBNI12-xx ISA and PCI adapters
561 # vmx: VMware VMXNET3 Ethernet (BSD open source)
562 # wl: Lucent Wavelan (ISA card only).
563 # wpi: Intel 3945ABG Wireless LAN controller
564 # Requires the wpi firmware module
566 # Order for ISA/EISA devices is important here
568 device bxe # Broadcom NetXtreme II BCM5771X/BCM578XX 10GbE
571 device cs # Crystal Semiconductor CS89x0 NIC
573 hint.cs.0.port="0x300"
576 hint.ctau.0.port="0x240"
579 #options NETGRAPH_CRONYX # Enable NETGRAPH support for Cronyx adapter(s)
580 device ed # NE[12]000, SMC Ultra, 3c503, DS8390 cards
585 hint.ed.0.port="0x280"
587 hint.ed.0.maddr="0xd8000"
588 device ipw # Intel 2100 wireless NICs.
589 device iwi # Intel 2200BG/2225BG/2915ABG wireless NICs.
590 device iwn # Intel 4965/1000/5000/6000 wireless NICs.
591 # Hint for the i386-only ISA front-end of le(4).
593 hint.le.0.port="0x280"
596 device mlx4 # Shared code module between IB and Ethernet
597 device mlx4ib # Mellanox ConnectX HCA InfiniBand
598 device mlx4en # Mellanox ConnectX HCA Ethernet
599 device mthca # Mellanox HCA InfiniBand
600 device nfe # nVidia nForce MCP on-board Ethernet
603 hint.sbni.0.port="0x210"
604 hint.sbni.0.irq="0xefdead"
605 hint.sbni.0.flags="0"
606 device vmx # VMware VMXNET3 Ethernet
607 device wpi # Intel 3945ABG wireless NICs.
609 # IEEE 802.11 adapter firmware modules
611 # Intel PRO/Wireless 2100 firmware:
612 # ipwfw: BSS/IBSS/monitor mode firmware
613 # ipwbssfw: BSS mode firmware
614 # ipwibssfw: IBSS mode firmware
615 # ipwmonitorfw: Monitor mode firmware
616 # Intel PRO/Wireless 2200BG/2225BG/2915ABG firmware:
617 # iwifw: BSS/IBSS/monitor mode firmware
618 # iwibssfw: BSS mode firmware
619 # iwiibssfw: IBSS mode firmware
620 # iwimonitorfw: Monitor mode firmware
621 # Intel Wireless WiFi Link 4965/1000/5000/6000 series firmware:
622 # iwnfw: Single module to support all devices
623 # iwn1000fw: Specific module for the 1000 only
624 # iwn105fw: Specific module for the 105 only
625 # iwn135fw: Specific module for the 135 only
626 # iwn2000fw: Specific module for the 2000 only
627 # iwn2030fw: Specific module for the 2030 only
628 # iwn4965fw: Specific module for the 4965 only
629 # iwn5000fw: Specific module for the 5000 only
630 # iwn5150fw: Specific module for the 5150 only
631 # iwn6000fw: Specific module for the 6000 only
632 # iwn6000g2afw: Specific module for the 6000g2a only
633 # iwn6000g2bfw: Specific module for the 6000g2b only
634 # iwn6050fw: Specific module for the 6050 only
635 # wpifw: Intel 3945ABG Wireless LAN Controller firmware
661 # Non-Transparent Bridge (NTB) drivers
663 device if_ntb # Virtual NTB network interface
664 device ntb_transport # NTB packet transport driver
665 device ntb # NTB hardware interface
666 device ntb_hw_intel # Intel NTB hardware driver
667 device ntb_hw_plx # PLX NTB hardware driver
675 # Areca 11xx and 12xx series of SATA II RAID controllers.
678 device arcmsr # Areca SATA II RAID
681 # 3ware 9000 series PATA/SATA RAID controller driver and options.
682 # The driver is implemented as a SIM, and so, needs the CAM infrastructure.
684 options TWA_DEBUG # 0-10; 10 prints the most messages.
685 device twa # 3ware 9000 series PATA/SATA RAID
688 # SCSI host adapters:
690 # ncv: NCR 53C500 based SCSI host adapters.
691 # nsp: Workbit Ninja SCSI-3 based PC Card SCSI host adapters.
692 # stg: TMC 18C30, 18C50 based SCSI host adapters.
698 hint.stg.0.port="0x140"
702 # Adaptec FSA RAID controllers, including integrated DELL controllers,
703 # the Dell PERC 2/QC and the HP NetRAID-4M
705 device aacp # SCSI Passthrough interface (optional, CAM required)
708 # Adaptec by PMC RAID controllers, Series 6/7/8 and upcoming families
709 device aacraid # Container interface, CAM required
712 # Highpoint RocketRAID 27xx.
716 # Highpoint RocketRAID 182x.
720 # Highpoint DC7280 and R750.
724 # Highpoint RocketRAID. Supports RR172x, RR222x, RR2240, RR232x, RR2340,
725 # RR2210, RR174x, RR2522, RR231x, RR230x.
729 # Highpoint RocketRaid 3xxx series SATA RAID
733 # IBM (now Adaptec) ServeRAID controllers
737 # Intel C600 (Patsburg) integrated SAS controller
739 options ISCI_LOGGING # enable debugging in isci HAL
742 # NVM Express (NVMe) support
743 device nvme # base NVMe driver
744 device nvd # expose NVMe namespaces as disks, depends on nvme
747 # PMC-Sierra SAS/SATA controller
750 # SafeNet crypto driver: can be moved to the MI NOTES as soon as
751 # it's tested on a big-endian machine
753 device safe # SafeNet 1141
754 options SAFE_DEBUG # enable debugging support: hw.safe.debug
755 options SAFE_RNDTEST # enable rndtest support
758 # glxiic is an I2C driver for the AMD Geode LX CS5536 System Management Bus
759 # controller. Requires 'device iicbus'.
761 device glxiic # AMD Geode LX CS5536 System Management Bus
764 # glxsb is a driver for the Security Block in AMD Geode LX processors.
765 # Requires 'device crypto'.
767 device glxsb # AMD Geode LX Security Block
772 # The virtio entry provides a generic bus for use by the device drivers.
773 # It must be combined with an interface that communicates with the host.
774 # Multiple such interfaces defined by the VirtIO specification. FreeBSD
775 # only has support for PCI. Therefore, virtio_pci must be statically
776 # compiled in or loaded as a module for the device drivers to function.
778 device virtio # Generic VirtIO bus (required)
779 device virtio_pci # VirtIO PCI Interface
780 device vtnet # VirtIO Ethernet device
781 device virtio_blk # VirtIO Block device
782 device virtio_scsi # VirtIO SCSI device
783 device virtio_balloon # VirtIO Memory Balloon device
784 device virtio_random # VirtIO Entropy device
785 device virtio_console # VirtIO Console device
787 device hyperv # HyperV drivers
789 #####################################################################
792 # Miscellaneous hardware:
794 # apm: Laptop Advanced Power Management (experimental)
795 # ipmi: Intelligent Platform Management Interface
796 # smapi: System Management Application Program Interface driver
797 # smbios: DMI/SMBIOS entry point
798 # vpd: Vital Product Data kernel interface
799 # pmtimer: Adjust system timer at wakeup time
800 # pbio: Parallel (8255 PPI) basic I/O (mode 0) port (e.g. Advantech PCL-724)
801 # asmc: Apple System Management Controller
802 # si: Specialix International SI/XIO or SX intelligent serial card driver
803 # tpm: Trusted Platform Module
806 # The flags takes the following meaning for apm0:
807 # 0x0020 Statclock is broken.
809 # Notes on the Specialix SI/XIO driver:
810 # The host card is memory, not IO mapped.
811 # The Rev 1 host cards use a 64K chunk, on a 32K boundary.
812 # The Rev 2 host cards use a 32K chunk, on a 32K boundary.
813 # The cards can use an IRQ of 11, 12 or 15.
815 # Notes on the Sony Programmable I/O controller
816 # This is a temporary driver that should someday be replaced by something
817 # that hooks into the ACPI layer. The device is hooked to the PIIX4's
818 # General Device 10 decoder, which means you have to fiddle with PCI
819 # registers to map it in, even though it is otherwise treated here as
820 # an ISA device. At the moment, the driver polls, although the device
821 # is capable of generating interrupts. It largely undocumented.
822 # The port location in the hint is where you WANT the device to be
823 # mapped. 0x10a0 seems to be traditional. At the moment the jogdial
824 # is the only thing truly supported, but apparently a fair percentage
825 # of the Vaio extra features are controlled by this device.
828 hint.apm.0.flags="0x20"
836 hint.pbio.0.port="0x360"
839 device padlock_rng # VIA Padlock RNG
840 device rdrand_rng # Intel Bull Mountain RNG
841 device aesni # AES-NI OpenCrypto module
844 # Laptop/Notebook options:
847 # apm under `Miscellaneous hardware'
850 # For older notebooks that signal a powerfail condition (external
851 # power supply dropped, or battery state low) by issuing an NMI:
853 options POWERFAIL_NMI # make it beep instead of panicing
858 # Philips i2c bus support is provided by the `iicbus' device.
860 # Supported interfaces:
861 # pcf Philips PCF8584 ISA-bus controller
865 hint.pcf.0.port="0x320"
869 # Hardware watchdog timers:
871 # ichwd: Intel ICH watchdog timer
872 # amdsbwd: AMD SB7xx watchdog timer
873 # viawd: VIA south bridge watchdog timer
874 # wbwd: Winbond watchdog timer
882 # Temperature sensors:
884 # coretemp: on-die sensor on Intel Core and newer CPUs
885 # amdtemp: on-die sensor on AMD K8/K10/K11 CPUs
891 # CPU control pseudo-device. Provides access to MSRs, CPUID info and
892 # microcode update feature.
897 # System Management Bus (SMB)
899 options ENABLE_ALART # Control alarm on Intel intpm driver
902 # Set the number of PV entries per process. Increasing this can
903 # stop panics related to heavy use of shared memory. However, that can
904 # (combined with large amounts of physical memory) cause panics at
905 # boot time due the kernel running out of VM space.
907 # If you're tweaking this, you might also want to increase the sysctls
908 # "vm.v_free_min", "vm.v_free_reserved", and "vm.v_free_target".
910 # The value below is the one more than the default.
912 options PMAP_SHPGPERPROC=201
915 # Change the size of the kernel virtual address space. Due to
916 # constraints in loader(8) on i386, this must be a multiple of 4.
917 # 256 = 1 GB of kernel address space. Increasing this also causes
918 # a reduction of the address space in user processes. 512 splits
919 # the 4GB cpu address space in half (2GB user, 2GB kernel). For PAE
920 # kernels, the value will need to be double non-PAE. A value of 1024
921 # for PAE kernels is necessary to split the address space in half.
922 # This will likely need to be increased to handle memory sizes >4GB.
923 # PAE kernels default to a value of 512.
925 options KVA_PAGES=260
928 # Number of initial kernel page table pages used for early bootstrap.
929 # This number should include enough pages to map the kernel, any
930 # modules or other data loaded with the kernel by the loader, and data
931 # structures allocated before the VM system is initialized such as the
932 # vm_page_t array. Each page table page maps 4MB (2MB with PAE).
937 #####################################################################
940 # Enable iBCS2 runtime support for SCO and ISC binaries
943 # Emulate spx device for client side of SVR3 local X interface
946 # Enable 32-bit runtime support for CloudABI binaries.
947 options COMPAT_CLOUDABI32
949 # Enable Linux ABI emulation
952 # Enable i386 a.out binary support
955 # Enable the linux-like proc filesystem support (requires COMPAT_LINUX
959 #Enable the linux-like sys filesystem support (requires COMPAT_LINUX
963 # Enable NDIS binary driver support
968 #####################################################################
971 # Disable the 4 MByte page PSE CPU feature. The PSE feature allows the
972 # kernel to use 4 MByte pages to map the kernel instead of 4k pages.
973 # This saves on the amount of memory needed for page tables needed to
974 # map the kernel. You should only disable this feature as a temporary
975 # workaround if you are having problems with it enabled.
979 # Disable the global pages PGE CPU feature. The PGE feature allows pages
980 # to be marked with the PG_G bit. TLB entries for these pages are not
981 # flushed from the cache when %cr3 is reloaded. This can make context
982 # switches less expensive. You should only disable this feature as a
983 # temporary workaround if you are having problems with it enabled.
985 #options DISABLE_PG_G
987 # KSTACK_PAGES is the number of memory pages to assign to the kernel
988 # stack of each thread.
990 options KSTACK_PAGES=3
992 # Enable detailed accounting by the PV entry allocator.
996 #####################################################################
998 # More undocumented options for linting.
999 # Note that documenting these are not considered an affront.
1001 options FB_INSTALL_CDEV # install a CDEV entry in /dev
1003 options I586_PMC_GUPROF=0x70000
1004 options KBDIO_DEBUG=2
1005 options KBD_MAXRETRY=4
1006 options KBD_MAXWAIT=6
1007 options KBD_RESETDELAY=201
1011 options TIMER_FREQ=((14318182+6)/12)
1013 options VM_KMEM_SIZE
1014 options VM_KMEM_SIZE_MAX
1015 options VM_KMEM_SIZE_SCALE