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_DISABLE_CMPXCHG disables the CMPXCHG instruction on > i386 IA32
119 # machines. VmWare 3.x seems to emulate this instruction poorly, causing
120 # the guest OS to run very slowly. This problem appears to be fixed in
121 # VmWare 4.x, at least in version 4.5.2, so that enabling this option with
122 # VmWare 4.x will result in locking operations to be 20-30 times slower.
123 # Enabling this with an SMP kernel will cause the kernel to be unusable.
125 # CPU_DISABLE_SSE explicitly prevents I686_CPU from turning on SSE.
127 # CPU_ELAN enables support for AMDs ElanSC520 CPU.
128 # CPU_ELAN_PPS enables precision timestamp code.
129 # CPU_ELAN_XTAL sets the clock crystal frequency in Hz.
131 # CPU_ENABLE_LONGRUN enables support for Transmeta Crusoe LongRun
132 # technology which allows to restrict power consumption of the CPU by
133 # using group of hw.crusoe.* sysctls.
135 # CPU_FASTER_5X86_FPU enables faster FPU exception handler.
137 # CPU_GEODE is for the SC1100 Geode embedded processor. This option
138 # is necessary because the i8254 timecounter is toast.
140 # CPU_I486_ON_386 enables CPU cache on i486 based CPU upgrade products
143 # CPU_IORT defines I/O clock delay time (NOTE 1). Default values of
144 # I/O clock delay time on Cyrix 5x86 and 6x86 are 0 and 7,respectively
147 # CPU_L2_LATENCY specifies the L2 cache latency value. This option is used
148 # only when CPU_PPRO2CELERON is defined and Mendocino Celeron is detected.
149 # The default value is 5.
151 # CPU_LOOP_EN prevents flushing the prefetch buffer if the destination
152 # of a jump is already present in the prefetch buffer on Cyrix 5x86(NOTE
155 # CPU_PPRO2CELERON enables L2 cache of Mendocino Celeron CPUs. This option
156 # is useful when you use Socket 8 to Socket 370 converter, because most Pentium
157 # Pro BIOSs do not enable L2 cache of Mendocino Celeron CPUs.
159 # CPU_RSTK_EN enables return stack on Cyrix 5x86 (NOTE 1).
161 # CPU_SOEKRIS enables support www.soekris.com hardware.
163 # CPU_SUSP_HLT enables suspend on HALT. If this option is set, CPU
164 # enters suspend mode following execution of HALT instruction.
166 # CPU_UPGRADE_HW_CACHE eliminates unneeded cache flush instruction(s).
168 # CPU_WT_ALLOC enables write allocation on Cyrix 6x86/6x86MX and AMD
171 # CYRIX_CACHE_WORKS enables CPU cache on Cyrix 486 CPUs with cache
172 # flush at hold state.
174 # CYRIX_CACHE_REALLY_WORKS enables (1) CPU cache on Cyrix 486 CPUs
175 # without cache flush at hold state, and (2) write-back CPU cache on
176 # Cyrix 6x86 whose revision < 2.7 (NOTE 2).
178 # NO_F00F_HACK disables the hack that prevents Pentiums (and ONLY
179 # Pentiums) from locking up when a LOCK CMPXCHG8B instruction is
180 # executed. This option is only needed if I586_CPU is also defined,
181 # and should be included for any non-Pentium CPU that defines it.
183 # NO_MEMORY_HOLE is an optimisation for systems with AMD K6 processors
184 # which indicates that the 15-16MB range is *definitely* not being
185 # occupied by an ISA memory hole.
187 # NOTE 1: The options, CPU_BTB_EN, CPU_LOOP_EN, CPU_IORT,
188 # CPU_LOOP_EN and CPU_RSTK_EN should not be used because of CPU bugs.
189 # These options may crash your system.
191 # NOTE 2: If CYRIX_CACHE_REALLY_WORKS is not set, CPU cache is enabled
192 # in write-through mode when revision < 2.7. If revision of Cyrix
193 # 6x86 >= 2.7, CPU cache is always enabled in write-back mode.
195 # NOTE 3: This option may cause failures for software that requires
196 # locked cycles in order to operate correctly.
198 options CPU_ATHLON_SSE_HACK
199 options CPU_BLUELIGHTNING_3X
200 options CPU_BLUELIGHTNING_FPU_OP_CACHE
202 options CPU_DIRECT_MAPPED_CACHE
203 options CPU_DISABLE_5X86_LSSER
204 options CPU_DISABLE_CMPXCHG
205 #options CPU_DISABLE_SSE
208 options CPU_ELAN_XTAL=32768000
209 options CPU_ENABLE_LONGRUN
210 options CPU_FASTER_5X86_FPU
212 options CPU_I486_ON_386
214 options CPU_L2_LATENCY=5
216 options CPU_PPRO2CELERON
220 options CPU_UPGRADE_HW_CACHE
222 options CYRIX_CACHE_WORKS
223 options CYRIX_CACHE_REALLY_WORKS
224 #options NO_F00F_HACK
227 options NPX_DEBUG # enable npx debugging
230 # PERFMON causes the driver for Pentium/Pentium Pro performance counters
231 # to be compiled. See perfmon(4) for more information.
236 # XBOX causes the kernel to be bootable on the Microsoft XBox console system.
237 # The resulting kernel will auto-detect whether it is being booted on a XBox,
238 # so kernels compiled with this option will also work on an ordinary PC.
239 # This option require I686_CPU.
241 # xboxfb includes support for the XBox frame buffer device. It is fully USB-
242 # keyboard aware, and will only be used if an xbox is detected. This option
243 # (obviously) requires XBOX support in your kernel.
245 # NOTE: xboxfb currently conflicts with syscons(4); if you have an XBOX and
246 # include both in your kernel; you will not get any video output. Ordinary
247 # PC's do not suffer from this.
253 #####################################################################
257 # DEVICE_POLLING adds support for mixed interrupt-polling handling
258 # of network device drivers, which has significant benefits in terms
259 # of robustness to overloads and responsivity, as well as permitting
260 # accurate scheduling of the CPU time between kernel network processing
261 # and other activities. The drawback is a moderate (up to 1/HZ seconds)
262 # potential increase in response times.
263 # It is strongly recommended to use HZ=1000 or 2000 with DEVICE_POLLING
264 # to achieve smoother behaviour.
265 # Additionally, you can enable/disable polling at runtime with help of
266 # the ifconfig(8) utility, and select the CPU fraction reserved to
267 # userland with the sysctl variable kern.polling.user_frac
268 # (default 50, range 0..100).
270 # Not all device drivers support this mode of operation at the time of
271 # this writing. See polling(4) for more details.
273 options DEVICE_POLLING
275 # BPF_JITTER adds support for BPF just-in-time compiler.
279 # OpenFabrics Enterprise Distribution (Infiniband).
281 options OFED_DEBUG_INIT
283 # Sockets Direct Protocol
293 #####################################################################
296 # Provide read/write access to the memory in the clock chip.
297 device nvram # Access to rtc cmos via /dev/nvram
300 #####################################################################
301 # MISCELLANEOUS DEVICES AND OPTIONS
303 device speaker #Play IBM BASIC-style noises out your speaker
304 hint.speaker.0.at="isa"
305 hint.speaker.0.port="0x61"
306 device gzip #Exec gzipped a.out's. REQUIRES COMPAT_AOUT!
307 device apm_saver # Requires APM
310 #####################################################################
311 # HARDWARE BUS CONFIGURATION
316 device isa # Required by npx(4)
321 # AUTO_EOI_1 enables the `automatic EOI' feature for the master 8259A
322 # interrupt controller. This saves about 0.7-1.25 usec for each interrupt.
323 # This option breaks suspend/resume on some portables.
325 # AUTO_EOI_2 enables the `automatic EOI' feature for the slave 8259A
326 # interrupt controller. This saves about 0.7-1.25 usec for each interrupt.
327 # Automatic EOI is documented not to work for for the slave with the
328 # original i8259A, but it works for some clones and some integrated
331 # MAXMEM specifies the amount of RAM on the machine; if this is not
332 # specified, FreeBSD will first read the amount of memory from the CMOS
333 # RAM, so the amount of memory will initially be limited to 64MB or 16MB
334 # depending on the BIOS. If the BIOS reports 64MB, a memory probe will
335 # then attempt to detect the installed amount of RAM. If this probe
336 # fails to detect >64MB RAM you will have to use the MAXMEM option.
337 # The amount is in kilobytes, so for a machine with 128MB of RAM, it would
338 # be 131072 (128 * 1024).
340 # BROKEN_KEYBOARD_RESET disables the use of the keyboard controller to
341 # reset the CPU for reboot. This is needed on some systems with broken
342 # keyboard controllers.
347 options MAXMEM=(128*1024)
348 #options BROKEN_KEYBOARD_RESET
353 # The EISA bus device is `eisa'. It provides auto-detection and
354 # configuration support for all devices on the EISA bus.
358 # By default, only 10 EISA slots are probed, since the slot numbers
359 # above clash with the configuration address space of the PCI subsystem,
360 # and the EISA probe is not very smart about this. This is sufficient
361 # for most machines, but in particular the HP NetServer LC series comes
362 # with an onboard AIC7770 dual-channel SCSI controller on EISA slot #11,
363 # thus you need to bump this figure to 12 for them.
364 options EISA_SLOTS=12
369 # The MCA bus device is `mca'. It provides auto-detection and
370 # configuration support for all devices on the MCA bus.
371 # No hints are required for MCA.
383 #####################################################################
384 # HARDWARE DEVICE CONFIGURATION
386 # To include support for VGA VESA video modes
389 # Turn on extra debugging checks and output for VESA support.
392 device dpms # DPMS suspend & resume via VESA BIOS
394 # x86 real mode BIOS emulator, required by atkbdc/dpms/vesa
398 # The Numeric Processing eXtension driver. This is non-optional.
400 hint.npx.0.flags="0x0"
405 # 0x01 don't use the npx registers to optimize bcopy.
406 # 0x02 don't use the npx registers to optimize bzero.
407 # 0x04 don't use the npx registers to optimize copyin or copyout.
408 # The npx registers are normally used to optimize copying and zeroing when
409 # all of the following conditions are satisfied:
410 # I586_CPU is an option
411 # the cpu is an i586 (perhaps not a Pentium)
412 # the probe for npx0 succeeds
413 # INT 16 exception handling works.
414 # Then copying and zeroing using the npx registers is normally 30-100% faster.
415 # The flags can be used to control cases where it doesn't work or is slower.
416 # Setting them at boot time using hints works right (the optimizations
417 # are not used until later in the bootstrap when npx0 is attached).
418 # Flag 0x08 automatically disables the i586 optimized routines.
427 hint.psm.0.at="atkbdc"
431 options PSM_HOOKRESUME #hook the system resume event, useful
433 options PSM_RESETAFTERSUSPEND #reset the device at the resume event
435 # The keyboard controller; it controls the keyboard and the PS/2 mouse.
437 hint.atkbdc.0.at="isa"
438 hint.atkbdc.0.port="0x060"
442 hint.atkbd.0.at="atkbdc"
446 options ATKBD_DFLT_KEYMAP # specify the built-in keymap
447 makeoptions ATKBD_DFLT_KEYMAP=fr.dvorak
450 # 0x01 Force detection of keyboard, else we always assume a keyboard
451 # 0x02 Don't reset keyboard, useful for some newer ThinkPads
452 # 0x03 Force detection and avoid reset, might help with certain
454 # 0x04 Old-style (XT) keyboard support, useful for older ThinkPads
456 # Video card driver for VGA adapters.
461 # Try the following option if the mouse pointer is not drawn correctly
462 # or font does not seem to be loaded properly. May cause flicker on
464 options VGA_ALT_SEQACCESS
466 # If you can dispense with some vga driver features, you may want to
467 # use the following options to save some memory.
468 #options VGA_NO_FONT_LOADING # don't save/load font
469 #options VGA_NO_MODE_CHANGE # don't change video modes
471 # Older video cards may require this option for proper operation.
472 options VGA_SLOW_IOACCESS # do byte-wide i/o's to TS and GDC regs
474 # The following option probably won't work with the LCD displays.
475 options VGA_WIDTH90 # support 90 column modes
483 # Linear framebuffer driver for S3 VESA 1.2 cards. Works on top of VESA.
486 # 3Dfx Voodoo Graphics, Voodoo II /dev/3dfx CDEV support. This will create
487 # the /dev/3dfx0 device to work with glide implementations. This should get
488 # linked to /dev/3dfx and /dev/voodoo. Note that this is not the same as
489 # the tdfx DRI module from XFree86 and is completely unrelated.
491 # To enable Linuxulator support, one must also include COMPAT_LINUX in the
492 # config as well. The other option is to load both as modules.
494 device tdfx # Enable 3Dfx Voodoo support
495 device tdfx_linux # Enable Linuxulator support
498 # ACPI support using the Intel ACPI Component Architecture reference
501 # ACPI_DEBUG enables the use of the debug.acpi.level and debug.acpi.layer
502 # kernel environment variables to select initial debugging levels for the
503 # Intel ACPICA code. (Note that the Intel code must also have USE_DEBUGGER
504 # defined when it is built).
510 # ACPI WMI Mapping driver
513 # ACPI Asus Extras (LCD backlight/brightness, video output, etc.)
516 # ACPI Fujitsu Extras (Buttons)
519 # ACPI extras driver for HP laptops
522 # ACPI extras driver for IBM laptops
525 # ACPI Panasonic Extras (LCD backlight/brightness, video output, etc.)
526 device acpi_panasonic
528 # ACPI Sony extra (LCD brightness)
531 # ACPI Toshiba Extras (LCD backlight/brightness, video output, etc.)
534 # ACPI Video Extensions (LCD backlight/brightness, video output, etc.)
537 # ACPI Docking Station
540 # ACPI ASOC ATK0110 ASUSTeK AI Booster (voltage, temperature and fan sensors)
543 # The cpufreq(4) driver provides support for non-ACPI CPU frequency control
546 # Direct Rendering modules for 3D acceleration.
547 device drm # DRM core module required by DRM drivers
548 device i915drm # Intel i830 through i915
549 device mach64drm # ATI Rage Pro, Rage Mobility P/M, Rage XL
550 device mgadrm # AGP Matrox G200, G400, G450, G550
551 device r128drm # ATI Rage 128
552 device radeondrm # ATI Radeon
553 device savagedrm # S3 Savage3D, Savage4
554 device sisdrm # SiS 300/305, 540, 630
555 device tdfxdrm # 3dfx Voodoo 3/4/5 and Banshee
557 options DRM_DEBUG # Include debug printfs (slow)
560 # mse: Logitech and ATI InPort bus mouse ports
564 hint.mse.0.port="0x23c"
568 # Network interfaces:
571 # bxe: Broadcom NetXtreme II (BCM5771X/BCM578XX) PCIe 10Gb Ethernet
573 # ce: Cronyx Tau-PCI/32 sync single/dual port G.703/E1 serial adaptor
574 # with 32 HDLC subchannels (requires sppp (default), or NETGRAPH if
575 # NETGRAPH_CRONYX is configured)
576 # cp: Cronyx Tau-PCI sync single/dual/four port
577 # V.35/RS-232/RS-530/RS-449/X.21/G.703/E1/E3/T3/STS-1
578 # serial adaptor (requires sppp (default), or NETGRAPH if
579 # NETGRAPH_CRONYX is configured)
580 # cs: IBM Etherjet and other Crystal Semi CS89x0-based adapters
581 # ctau: Cronyx Tau sync dual port V.35/RS-232/RS-530/RS-449/X.21/G.703/E1
582 # serial adaptor (requires sppp (default), or NETGRAPH if
583 # NETGRAPH_CRONYX is configured)
584 # ed: Western Digital and SMC 80xx; Novell NE1000 and NE2000; 3Com 3C503
585 # HP PC Lan+, various PC Card devices
587 # ie: AT&T StarLAN 10 and EN100; 3Com 3C507; unknown NI5210;
589 # ipw: Intel PRO/Wireless 2100 IEEE 802.11 adapter
590 # iwi: Intel PRO/Wireless 2200BG/2225BG/2915ABG IEEE 802.11 adapters
591 # Requires the iwi firmware module
592 # iwn: Intel Wireless WiFi Link 1000/105/135/2000/4965/5000/6000/6050 abgn
593 # 802.11 network adapters
594 # Requires the iwn firmware module
595 # mlx4ib: Mellanox ConnectX HCA InfiniBand
596 # mlxen: Mellanox ConnectX HCA Ethernet
597 # mthca: Mellanox HCA InfiniBand
598 # nfe: nVidia nForce MCP on-board Ethernet Networking (BSD open source)
599 # sbni: Granch SBNI12-xx ISA and PCI adapters
600 # vmx: VMware VMXNET3 Ethernet (BSD open source)
601 # wl: Lucent Wavelan (ISA card only).
602 # wpi: Intel 3945ABG Wireless LAN controller
603 # Requires the wpi firmware module
605 # Order for ISA/EISA devices is important here
607 device bxe # Broadcom NetXtreme II BCM5771X/BCM578XX 10GbE
610 device cs # Crystal Semiconductor CS89x0 NIC
612 hint.cs.0.port="0x300"
615 hint.ctau.0.port="0x240"
618 #options NETGRAPH_CRONYX # Enable NETGRAPH support for Cronyx adapter(s)
619 device ed # NE[12]000, SMC Ultra, 3c503, DS8390 cards
624 hint.ed.0.port="0x280"
626 hint.ed.0.maddr="0xd8000"
627 device ipw # Intel 2100 wireless NICs.
628 device iwi # Intel 2200BG/2225BG/2915ABG wireless NICs.
629 device iwn # Intel 4965/1000/5000/6000 wireless NICs.
630 # Hint for the i386-only ISA front-end of le(4).
632 hint.le.0.port="0x280"
635 device mlx4ib # Mellanox ConnectX HCA InfiniBand
636 device mlxen # Mellanox ConnectX HCA Ethernet
637 device mthca # Mellanox HCA InfiniBand
638 device nfe # nVidia nForce MCP on-board Ethernet
641 hint.sbni.0.port="0x210"
642 hint.sbni.0.irq="0xefdead"
643 hint.sbni.0.flags="0"
644 device vmx # VMware VMXNET3 Ethernet
645 device wpi # Intel 3945ABG wireless NICs.
647 # IEEE 802.11 adapter firmware modules
649 # Intel PRO/Wireless 2100 firmware:
650 # ipwfw: BSS/IBSS/monitor mode firmware
651 # ipwbssfw: BSS mode firmware
652 # ipwibssfw: IBSS mode firmware
653 # ipwmonitorfw: Monitor mode firmware
654 # Intel PRO/Wireless 2200BG/2225BG/2915ABG firmware:
655 # iwifw: BSS/IBSS/monitor mode firmware
656 # iwibssfw: BSS mode firmware
657 # iwiibssfw: IBSS mode firmware
658 # iwimonitorfw: Monitor mode firmware
659 # Intel Wireless WiFi Link 4965/1000/5000/6000 series firmware:
660 # iwnfw: Single module to support all devices
661 # iwn1000fw: Specific module for the 1000 only
662 # iwn105fw: Specific module for the 105 only
663 # iwn135fw: Specific module for the 135 only
664 # iwn2000fw: Specific module for the 2000 only
665 # iwn2030fw: Specific module for the 2030 only
666 # iwn4965fw: Specific module for the 4965 only
667 # iwn5000fw: Specific module for the 5000 only
668 # iwn5150fw: Specific module for the 5150 only
669 # iwn6000fw: Specific module for the 6000 only
670 # iwn6000g2afw: Specific module for the 6000g2a only
671 # iwn6000g2bfw: Specific module for the 6000g2b only
672 # iwn6050fw: Specific module for the 6050 only
673 # wpifw: Intel 3945ABG Wireless LAN Controller firmware
704 # Areca 11xx and 12xx series of SATA II RAID controllers.
707 device arcmsr # Areca SATA II RAID
710 # 3ware 9000 series PATA/SATA RAID controller driver and options.
711 # The driver is implemented as a SIM, and so, needs the CAM infrastructure.
713 options TWA_DEBUG # 0-10; 10 prints the most messages.
714 options TWA_FLASH_FIRMWARE # firmware image bundled when defined.
715 device twa # 3ware 9000 series PATA/SATA RAID
718 # SCSI host adapters:
720 # ncv: NCR 53C500 based SCSI host adapters.
721 # nsp: Workbit Ninja SCSI-3 based PC Card SCSI host adapters.
722 # stg: TMC 18C30, 18C50 based SCSI host adapters.
728 hint.stg.0.port="0x140"
732 # Adaptec FSA RAID controllers, including integrated DELL controllers,
733 # the Dell PERC 2/QC and the HP NetRAID-4M
735 device aacp # SCSI Passthrough interface (optional, CAM required)
738 # Adaptec by PMC RAID controllers, Series 6/7/8 and upcoming families
739 device aacraid # Container interface, CAM required
742 # Highpoint RocketRAID 27xx.
746 # Highpoint RocketRAID 182x.
750 # Highpoint DC7280 and R750.
754 # Highpoint RocketRAID. Supports RR172x, RR222x, RR2240, RR232x, RR2340,
755 # RR2210, RR174x, RR2522, RR231x, RR230x.
759 # Highpoint RocketRaid 3xxx series SATA RAID
763 # IBM (now Adaptec) ServeRAID controllers
767 # Intel C600 (Patsburg) integrated SAS controller
769 options ISCI_LOGGING # enable debugging in isci HAL
772 # NVM Express (NVMe) support
773 device nvme # base NVMe driver
774 device nvd # expose NVMe namespaces as disks, depends on nvme
777 # PMC-Sierra SAS/SATA controller
780 # SafeNet crypto driver: can be moved to the MI NOTES as soon as
781 # it's tested on a big-endian machine
783 device safe # SafeNet 1141
784 options SAFE_DEBUG # enable debugging support: hw.safe.debug
785 options SAFE_RNDTEST # enable rndtest support
788 # glxiic is an I2C driver for the AMD Geode LX CS5536 System Management Bus
789 # controller. Requires 'device iicbus'.
791 device glxiic # AMD Geode LX CS5536 System Management Bus
794 # glxsb is a driver for the Security Block in AMD Geode LX processors.
795 # Requires 'device crypto'.
797 device glxsb # AMD Geode LX Security Block
802 # The virtio entry provides a generic bus for use by the device drivers.
803 # It must be combined with an interface that communicates with the host.
804 # Multiple such interfaces defined by the VirtIO specification. FreeBSD
805 # only has support for PCI. Therefore, virtio_pci must be statically
806 # compiled in or loaded as a module for the device drivers to function.
808 device virtio # Generic VirtIO bus (required)
809 device virtio_pci # VirtIO PCI Interface
810 device vtnet # VirtIO Ethernet device
811 device virtio_blk # VirtIO Block device
812 device virtio_scsi # VirtIO SCSI device
813 device virtio_balloon # VirtIO Memory Balloon device
814 device virtio_random # VirtIO Entropy device
815 device virtio_console # VirtIO Console device
817 device hyperv # HyperV drivers
819 #####################################################################
822 # Miscellaneous hardware:
824 # apm: Laptop Advanced Power Management (experimental)
825 # ipmi: Intelligent Platform Management Interface
826 # smapi: System Management Application Program Interface driver
827 # smbios: DMI/SMBIOS entry point
828 # vpd: Vital Product Data kernel interface
829 # pmtimer: Adjust system timer at wakeup time
830 # pbio: Parallel (8255 PPI) basic I/O (mode 0) port (e.g. Advantech PCL-724)
831 # asmc: Apple System Management Controller
832 # si: Specialix International SI/XIO or SX intelligent serial card driver
833 # tpm: Trusted Platform Module
836 # The flags takes the following meaning for apm0:
837 # 0x0020 Statclock is broken.
839 # Notes on the Specialix SI/XIO driver:
840 # The host card is memory, not IO mapped.
841 # The Rev 1 host cards use a 64K chunk, on a 32K boundary.
842 # The Rev 2 host cards use a 32K chunk, on a 32K boundary.
843 # The cards can use an IRQ of 11, 12 or 15.
845 # Notes on the Sony Programmable I/O controller
846 # This is a temporary driver that should someday be replaced by something
847 # that hooks into the ACPI layer. The device is hooked to the PIIX4's
848 # General Device 10 decoder, which means you have to fiddle with PCI
849 # registers to map it in, even though it is otherwise treated here as
850 # an ISA device. At the moment, the driver polls, although the device
851 # is capable of generating interrupts. It largely undocumented.
852 # The port location in the hint is where you WANT the device to be
853 # mapped. 0x10a0 seems to be traditional. At the moment the jogdial
854 # is the only thing truly supported, but apparently a fair percentage
855 # of the Vaio extra features are controlled by this device.
858 hint.apm.0.flags="0x20"
866 hint.pbio.0.port="0x360"
869 device padlock_rng # VIA Padlock RNG
870 device rdrand_rng # Intel Bull Mountain RNG
871 device aesni # AES-NI OpenCrypto module
874 # Laptop/Notebook options:
877 # apm under `Miscellaneous hardware'
880 # For older notebooks that signal a powerfail condition (external
881 # power supply dropped, or battery state low) by issuing an NMI:
883 options POWERFAIL_NMI # make it beep instead of panicing
888 # Philips i2c bus support is provided by the `iicbus' device.
890 # Supported interfaces:
891 # pcf Philips PCF8584 ISA-bus controller
895 hint.pcf.0.port="0x320"
899 # Hardware watchdog timers:
901 # ichwd: Intel ICH watchdog timer
902 # amdsbwd: AMD SB7xx watchdog timer
903 # viawd: VIA south bridge watchdog timer
904 # wbwd: Winbond watchdog timer
912 # Temperature sensors:
914 # coretemp: on-die sensor on Intel Core and newer CPUs
915 # amdtemp: on-die sensor on AMD K8/K10/K11 CPUs
921 # CPU control pseudo-device. Provides access to MSRs, CPUID info and
922 # microcode update feature.
927 # System Management Bus (SMB)
929 options ENABLE_ALART # Control alarm on Intel intpm driver
932 # Set the number of PV entries per process. Increasing this can
933 # stop panics related to heavy use of shared memory. However, that can
934 # (combined with large amounts of physical memory) cause panics at
935 # boot time due the kernel running out of VM space.
937 # If you're tweaking this, you might also want to increase the sysctls
938 # "vm.v_free_min", "vm.v_free_reserved", and "vm.v_free_target".
940 # The value below is the one more than the default.
942 options PMAP_SHPGPERPROC=201
945 # Change the size of the kernel virtual address space. Due to
946 # constraints in loader(8) on i386, this must be a multiple of 4.
947 # 256 = 1 GB of kernel address space. Increasing this also causes
948 # a reduction of the address space in user processes. 512 splits
949 # the 4GB cpu address space in half (2GB user, 2GB kernel). For PAE
950 # kernels, the value will need to be double non-PAE. A value of 1024
951 # for PAE kernels is necessary to split the address space in half.
952 # This will likely need to be increased to handle memory sizes >4GB.
953 # PAE kernels default to a value of 512.
955 options KVA_PAGES=260
958 # Number of initial kernel page table pages used for early bootstrap.
959 # This number should include enough pages to map the kernel, any
960 # modules or other data loaded with the kernel by the loader, and data
961 # structures allocated before the VM system is initialized such as the
962 # vm_page_t array. Each page table page maps 4MB (2MB with PAE).
967 #####################################################################
970 # Enable iBCS2 runtime support for SCO and ISC binaries
973 # Emulate spx device for client side of SVR3 local X interface
976 # Enable 32-bit runtime support for CloudABI binaries.
977 options COMPAT_CLOUDABI32
979 # Enable Linux ABI emulation
982 # Enable i386 a.out binary support
985 # Enable the linux-like proc filesystem support (requires COMPAT_LINUX
989 #Enable the linux-like sys filesystem support (requires COMPAT_LINUX
994 # SysVR4 ABI emulation
996 # The svr4 ABI emulator can be statically compiled into the kernel or loaded as
998 # The STREAMS network emulation code can also be compiled statically or as a
999 # module. If loaded as a module, it must be loaded before the svr4 module
1000 # (the /usr/sbin/svr4 script does this for you). If compiling statically,
1001 # the `streams' device must be configured into any kernel which also
1002 # specifies COMPAT_SVR4. It is possible to have a statically-configured
1003 # STREAMS device and a dynamically loadable svr4 emulator; the /usr/sbin/svr4
1004 # script understands that it doesn't need to load the `streams' module under
1005 # those circumstances.
1006 # Caveat: At this time, `options KTRACE' is required for the svr4 emulator
1007 # (whether static or dynamic).
1009 options COMPAT_SVR4 # build emulator statically
1010 options DEBUG_SVR4 # enable verbose debugging
1011 device streams # STREAMS network driver (required for svr4).
1013 # Enable NDIS binary driver support
1018 #####################################################################
1021 # Disable the 4 MByte page PSE CPU feature. The PSE feature allows the
1022 # kernel to use 4 MByte pages to map the kernel instead of 4k pages.
1023 # This saves on the amount of memory needed for page tables needed to
1024 # map the kernel. You should only disable this feature as a temporary
1025 # workaround if you are having problems with it enabled.
1027 #options DISABLE_PSE
1029 # Disable the global pages PGE CPU feature. The PGE feature allows pages
1030 # to be marked with the PG_G bit. TLB entries for these pages are not
1031 # flushed from the cache when %cr3 is reloaded. This can make context
1032 # switches less expensive. You should only disable this feature as a
1033 # temporary workaround if you are having problems with it enabled.
1035 #options DISABLE_PG_G
1037 # KSTACK_PAGES is the number of memory pages to assign to the kernel
1038 # stack of each thread.
1040 options KSTACK_PAGES=3
1042 # Enable detailed accounting by the PV entry allocator.
1046 #####################################################################
1048 # More undocumented options for linting.
1049 # Note that documenting these are not considered an affront.
1051 options FB_INSTALL_CDEV # install a CDEV entry in /dev
1053 options I586_PMC_GUPROF=0x70000
1054 options KBDIO_DEBUG=2
1055 options KBD_MAXRETRY=4
1056 options KBD_MAXWAIT=6
1057 options KBD_RESETDELAY=201
1061 options TIMER_FREQ=((14318182+6)/12)
1063 options VM_KMEM_SIZE
1064 options VM_KMEM_SIZE_MAX
1065 options VM_KMEM_SIZE_SCALE