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 #####################################################################
37 # IPI_PREEMPTION instructs the kernel to preempt threads running on other
38 # CPUS if needed. Relies on the PREEMPTION option
41 options IPI_PREEMPTION
42 device atpic # Optional legacy pic support
43 device mptable # Optional MPSPEC mptable support
47 options COUNT_XINVLTLB_HITS # Counters for TLB events
48 options COUNT_IPIS # Per-CPU IPI interrupt counters
52 #####################################################################
56 # You must specify at least one CPU (the one you intend to run on);
57 # deleting the specification for CPUs you don't need to use may make
58 # parts of the system run faster.
60 cpu HAMMER # aka K8, aka Opteron & Athlon64
63 # Options for CPU features.
67 #####################################################################
71 # DEVICE_POLLING adds support for mixed interrupt-polling handling
72 # of network device drivers, which has significant benefits in terms
73 # of robustness to overloads and responsivity, as well as permitting
74 # accurate scheduling of the CPU time between kernel network processing
75 # and other activities. The drawback is a moderate (up to 1/HZ seconds)
76 # potential increase in response times.
77 # It is strongly recommended to use HZ=1000 or 2000 with DEVICE_POLLING
78 # to achieve smoother behaviour.
79 # Additionally, you can enable/disable polling at runtime with help of
80 # the ifconfig(8) utility, and select the CPU fraction reserved to
81 # userland with the sysctl variable kern.polling.user_frac
82 # (default 50, range 0..100).
84 # Not all device drivers support this mode of operation at the time of
85 # this writing. See polling(4) for more details.
87 options DEVICE_POLLING
89 # BPF_JITTER adds support for BPF just-in-time compiler.
93 # OpenFabrics Enterprise Distribution (Infiniband).
95 options OFED_DEBUG_INIT
97 # Sockets Direct Protocol
107 #####################################################################
110 # Provide read/write access to the memory in the clock chip.
111 device nvram # Access to rtc cmos via /dev/nvram
114 #####################################################################
115 # MISCELLANEOUS DEVICES AND OPTIONS
117 device speaker #Play IBM BASIC-style noises out your speaker
118 envvar hint.speaker.0.at="isa"
119 envvar hint.speaker.0.port="0x61"
122 #####################################################################
123 # HARDWARE BUS CONFIGURATION
133 # AUTO_EOI_1 enables the `automatic EOI' feature for the master 8259A
134 # interrupt controller. This saves about 0.7-1.25 usec for each interrupt.
135 # This option breaks suspend/resume on some portables.
137 # AUTO_EOI_2 enables the `automatic EOI' feature for the slave 8259A
138 # interrupt controller. This saves about 0.7-1.25 usec for each interrupt.
139 # Automatic EOI is documented not to work for the slave with the
140 # original i8259A, but it works for some clones and some integrated
143 # MAXMEM specifies the amount of RAM on the machine; if this is not
144 # specified, FreeBSD will first read the amount of memory from the CMOS
145 # RAM, so the amount of memory will initially be limited to 64MB or 16MB
146 # depending on the BIOS. If the BIOS reports 64MB, a memory probe will
147 # then attempt to detect the installed amount of RAM. If this probe
148 # fails to detect >64MB RAM you will have to use the MAXMEM option.
149 # The amount is in kilobytes, so for a machine with 128MB of RAM, it would
150 # be 131072 (128 * 1024).
152 # BROKEN_KEYBOARD_RESET disables the use of the keyboard controller to
153 # reset the CPU for reboot. This is needed on some systems with broken
154 # keyboard controllers.
159 options MAXMEM=(128*1024)
160 #options BROKEN_KEYBOARD_RESET
172 #####################################################################
173 # HARDWARE DEVICE CONFIGURATION
175 # To include support for VGA VESA video modes
178 # Turn on extra debugging checks and output for VESA support.
181 device dpms # DPMS suspend & resume via VESA BIOS
183 # x86 real mode BIOS emulator, required by atkbdc/dpms/vesa
192 envvar hint.psm.0.at="atkbdc"
193 envvar hint.psm.0.irq="12"
196 options PSM_HOOKRESUME #hook the system resume event, useful
198 options PSM_RESETAFTERSUSPEND #reset the device at the resume event
200 # The keyboard controller; it controls the keyboard and the PS/2 mouse.
202 envvar hint.atkbdc.0.at="isa"
203 envvar hint.atkbdc.0.port="0x060"
207 envvar hint.atkbd.0.at="atkbdc"
208 envvar hint.atkbd.0.irq="1"
211 options ATKBD_DFLT_KEYMAP # specify the built-in keymap
212 makeoptions ATKBD_DFLT_KEYMAP=fr.dvorak
215 # 0x01 Force detection of keyboard, else we always assume a keyboard
216 # 0x02 Don't reset keyboard, useful for some newer ThinkPads
217 # 0x03 Force detection and avoid reset, might help with certain
219 # 0x04 Old-style (XT) keyboard support, useful for older ThinkPads
221 # Video card driver for VGA adapters.
223 envvar hint.vga.0.at="isa"
226 # Try the following option if the mouse pointer is not drawn correctly
227 # or font does not seem to be loaded properly. May cause flicker on
229 options VGA_ALT_SEQACCESS
231 # If you can dispense with some vga driver features, you may want to
232 # use the following options to save some memory.
233 #options VGA_NO_FONT_LOADING # don't save/load font
234 #options VGA_NO_MODE_CHANGE # don't change video modes
236 # Older video cards may require this option for proper operation.
237 options VGA_SLOW_IOACCESS # do byte-wide i/o's to TS and GDC regs
239 # The following option probably won't work with the LCD displays.
240 options VGA_WIDTH90 # support 90 column modes
247 device vt_efifb # EFI framebuffer
248 device vt_vbefb # VBE framebuffer
250 # Linear framebuffer driver for S3 VESA 1.2 cards. Works on top of VESA.
253 # 3Dfx Voodoo Graphics, Voodoo II /dev/3dfx CDEV support. This will create
254 # the /dev/3dfx0 device to work with glide implementations. This should get
255 # linked to /dev/3dfx and /dev/voodoo. Note that this is not the same as
256 # the tdfx DRI module from XFree86 and is completely unrelated.
259 device tdfx # Enable 3Dfx Voodoo support
262 # ACPI support using the Intel ACPI Component Architecture reference
265 # ACPI_DEBUG enables the use of the debug.acpi.level and debug.acpi.layer
266 # kernel environment variables to select initial debugging levels for the
267 # Intel ACPICA code. (Note that the Intel code must also have USE_DEBUGGER
268 # defined when it is built).
273 # The cpufreq(4) driver provides support for non-ACPI CPU frequency control
277 # Network interfaces:
280 # axp: AMD EPYC integrated NIC
281 # Requires the miibus module
282 # bxe: Broadcom NetXtreme II (BCM5771X/BCM578XX) PCIe 10Gb Ethernet
284 # ice: Intel 800 Series Physical Function
285 # Requires the ice_ddp module for full functionality
286 # igc: Intel I225 2.5Gb Ethernet adapter
287 # ipw: Intel PRO/Wireless 2100 IEEE 802.11 adapter
288 # Requires the ipw firmware module
289 # irdma: Intel 800 Series RDMA driver
290 # Requires the ice module
291 # iwi: Intel PRO/Wireless 2200BG/2225BG/2915ABG IEEE 802.11 adapters
292 # Requires the iwi firmware module
293 # iwn: Intel Wireless WiFi Link 1000/105/135/2000/4965/5000/6000/6050 abgn
294 # 802.11 network adapters
295 # Requires the iwn firmware module
296 # mthca: Mellanox HCA InfiniBand
297 # mlx4ib: Mellanox ConnectX HCA InfiniBand
298 # mlx4en: Mellanox ConnectX HCA Ethernet
299 # nfe: nVidia nForce MCP on-board Ethernet Networking (BSD open source)
300 # qlxgb: QLogic 3200 and 8200 series 10 Gigabit Ethernet & CNA Adapter
301 # qlxgbe: QLogic 8300 series 10 Gigabit Ethernet & CNA Adapter
302 # qlxge: QLogic 8100 series 10 Gigabit Ethernet & CNA Adapter
303 # qlnxe: Cavium QLogic 41000/45000 series 10/25/40/100 Gigabit Ethernet & CNA Adapter
304 # sfxge: Solarflare SFC9000 family 10Gb Ethernet adapters
305 # vmx: VMware VMXNET3 Ethernet (BSD open source)
306 # wpi: Intel 3945ABG Wireless LAN controller
307 # Requires the wpi firmware module
309 device axp # AMD EPYC integrated NIC
310 device bxe # Broadcom NetXtreme II BCM5771X/BCM578XX 10GbE
311 device igc # Intel I225 2.5G Ethernet
312 device ipw # Intel 2100 wireless NICs.
313 device iwi # Intel 2200BG/2225BG/2915ABG wireless NICs.
314 device iwn # Intel 4965/1000/5000/6000 wireless NICs.
315 device ixl # Intel 700 Series Physical Function
316 device iavf # Intel Adaptive Virtual Function
317 device ice # Intel 800 Series Physical Function
318 device ice_ddp # Intel 800 Series DDP Package
319 device irdma # Intel 800 Series RDMA driver
320 device mthca # Mellanox HCA InfiniBand
321 device mlx4 # Shared code module between IB and Ethernet
322 device mlx4ib # Mellanox ConnectX HCA InfiniBand
323 device mlx4en # Mellanox ConnectX HCA Ethernet
324 device nfe # nVidia nForce MCP on-board Ethernet
325 device qlxgb # QLogic 3200/8200 Ethernet
326 device qlxgbe # QLogic 8300 Ethernet
327 device qlxge # QLogic 8100 Ethernet
328 device qlnxe # QLogic 41000/45000 Ethernet
329 device sfxge # Solarflare SFC9000 10Gb Ethernet
330 device vmx # VMware VMXNET3 Ethernet
331 device wpi # Intel 3945ABG wireless NICs.
333 # IEEE 802.11 adapter firmware modules
335 # Intel PRO/Wireless 2100 firmware:
336 # ipwfw: BSS/IBSS/monitor mode firmware
337 # ipwbssfw: BSS mode firmware
338 # ipwibssfw: IBSS mode firmware
339 # ipwmonitorfw: Monitor mode firmware
340 # Intel PRO/Wireless 2200BG/2225BG/2915ABG firmware:
341 # iwifw: BSS/IBSS/monitor mode firmware
342 # iwibssfw: BSS mode firmware
343 # iwiibssfw: IBSS mode firmware
344 # iwimonitorfw: Monitor mode firmware
345 # Intel Wireless WiFi Link 4965/1000/5000/6000 series firmware:
346 # iwnfw: Single module to support all devices
347 # iwn1000fw: Specific module for the 1000 only
348 # iwn105fw: Specific module for the 105 only
349 # iwn135fw: Specific module for the 135 only
350 # iwn2000fw: Specific module for the 2000 only
351 # iwn2030fw: Specific module for the 2030 only
352 # iwn4965fw: Specific module for the 4965 only
353 # iwn5000fw: Specific module for the 5000 only
354 # iwn5150fw: Specific module for the 5150 only
355 # iwn6000fw: Specific module for the 6000 only
356 # iwn6000g2afw: Specific module for the 6000g2a only
357 # iwn6000g2bfw: Specific module for the 6000g2b only
358 # iwn6050fw: Specific module for the 6050 only
359 # wpifw: Intel 3945ABG Wireless LAN Controller firmware
385 options IEEE80211_DEBUG_REFCNT
388 # Non-Transparent Bridge (NTB) drivers
390 device if_ntb # Virtual NTB network interface
391 device ntb_transport # NTB packet transport driver
392 device ntb # NTB hardware interface
393 device ntb_hw_amd # AMD NTB hardware driver
394 device ntb_hw_intel # Intel NTB hardware driver
395 device ntb_hw_plx # PLX NTB hardware driver
398 #XXX this stores pointers in a 32bit field that is defined by the hardware
402 # Areca 11xx and 12xx series of SATA II RAID controllers.
405 device arcmsr # Areca SATA II RAID
408 # Microsemi smartpqi controllers.
409 # These controllers have a SCSI-like interface, and require the
410 # CAM infrastructure.
415 # Adaptec FSA RAID controllers, including integrated DELL controllers,
416 # the Dell PERC 2/QC and the HP NetRAID-4M
418 device aacp # SCSI Passthrough interface (optional, CAM required)
421 # Highpoint RocketRAID 27xx.
425 # Highpoint RocketRAID 182x.
429 # Highpoint DC7280 and R750.
433 # Highpoint RocketRAID. Supports RR172x, RR222x, RR2240, RR232x, RR2340,
434 # RR2210, RR174x, RR2522, RR231x, RR230x.
438 # Highpoint RocketRaid 3xxx series SATA RAID
442 # IBM (now Adaptec) ServeRAID controllers
446 # Intel integrated Memory Controller (iMC) SMBus controller
447 # Sandybridge-Xeon, Ivybridge-Xeon, Haswell-Xeon, Broadwell-Xeon
451 # Intel C600 (Patsburg) integrated SAS controller
453 options ISCI_LOGGING # enable debugging in isci HAL
456 # NVM Express (NVMe) support
457 device nvme # base NVMe driver
458 device nvd # expose NVMe namespaces as disks, depends on nvme
461 # Intel Volume Management Device (VMD) support
465 # PMC-Sierra SAS/SATA controller
469 # Intel QuickAssist driver with OpenCrypto support
471 # Only for legacy Atom C2XXX chipsets.
475 # SafeNet crypto driver: can be moved to the MI NOTES as soon as
476 # it's tested on a big-endian machine
478 device safe # SafeNet 1141
479 options SAFE_DEBUG # enable debugging support: hw.safe.debug
480 options SAFE_RNDTEST # enable rndtest support
485 # The virtio entry provides a generic bus for use by the device drivers.
486 # It must be combined with an interface that communicates with the host.
487 # Multiple such interfaces are defined by the VirtIO specification. FreeBSD
488 # only has support for PCI. Therefore, virtio_pci must be statically
489 # compiled in or loaded as a module for the device drivers to function.
491 device virtio # Generic VirtIO bus (required)
492 device virtio_pci # VirtIO PCI Interface
493 device vtnet # VirtIO Ethernet device
494 device virtio_blk # VirtIO Block device
495 device virtio_scsi # VirtIO SCSI device
496 device virtio_balloon # VirtIO Memory Balloon device
497 device virtio_random # VirtIO Entropy device
498 device virtio_console # VirtIO Console device
500 # Linux KVM paravirtualization support
501 device kvm_clock # KVM paravirtual clock driver
504 device gve # Google Virtual NIC (gVNIC) driver
506 # Microsoft Hyper-V enhancement support
507 device hyperv # HyperV drivers
508 device hvhid # HyperV HID device
510 # Xen HVM Guest Optimizations
511 options XENHVM # Xen HVM kernel infrastructure
512 device xenefi # Xen EFI timer device
513 device xenpci # Xen HVM Hypervisor services driver
514 device xentimer # Xen x86 PV timer device
516 #####################################################################
519 # Miscellaneous hardware:
521 # ipmi: Intelligent Platform Management Interface
522 # pbio: Parallel (8255 PPI) basic I/O (mode 0) port (e.g. Advantech PCL-724)
523 # smbios: DMI/SMBIOS entry point (requires EFIRT option)
524 # vpd: Vital Product Data kernel interface
525 # asmc: Apple System Management Controller
526 # si: Specialix International SI/XIO or SX intelligent serial card
527 # tpm: Trusted Platform Module
529 # Notes on the Specialix SI/XIO driver:
530 # The host card is memory, not IO mapped.
531 # The Rev 1 host cards use a 64K chunk, on a 32K boundary.
532 # The Rev 2 host cards use a 32K chunk, on a 32K boundary.
533 # The cards can use an IRQ of 11, 12 or 15.
537 envvar hint.pbio.0.at="isa"
538 envvar hint.pbio.0.port="0x360"
543 device padlock_rng # VIA Padlock RNG
544 device rdrand_rng # Intel Bull Mountain RNG
545 device aesni # AES-NI OpenCrypto module
546 device ossl # OpenSSL OpenCrypto module
547 device ioat # Intel I/OAT DMA engine
550 # Laptop/Notebook options:
560 # Hardware watchdog timers:
562 # ichwd: Intel ICH watchdog timer
563 # amdsbwd: AMD SB7xx watchdog timer
564 # viawd: VIA south bridge watchdog timer
565 # wbwd: Winbond watchdog timer
566 # itwd: ITE Super I/O watchdog timer
575 # Temperature sensors:
577 # coretemp: on-die sensor on Intel Core and newer CPUs
578 # amdtemp: on-die sensor on AMD K8/K10/K11 CPUs
584 # CPU control pseudo-device. Provides access to MSRs, CPUID info and
585 # microcode update feature.
595 # System Management Bus (SMB)
597 options ENABLE_ALART # Control alarm on Intel intpm driver
600 # AMD System Management Network (SMN)
605 # Number of initial kernel page table pages used for early bootstrap.
606 # This number should include enough pages to map the kernel and any
607 # modules or other data loaded with the kernel by the loader. Each
608 # page table page maps 2MB.
612 # EFI Runtime Services support
616 # HID-over-I2C support
618 device iichid # HID-over-I2C support
619 options IICHID_DEBUG # Enable HID-over-I2C debug messages
620 options IICHID_SAMPLING # Workaround missing GPIO INTR support
622 #####################################################################
625 #XXX keep these here for now and reactivate when support for emulating
626 #XXX these 32 bit binaries is added.
628 # Enable 32-bit runtime support for FreeBSD/i386 binaries.
629 options COMPAT_FREEBSD32
631 # Enable (32-bit) a.out binary support
634 #####################################################################
637 # NB: This depends on crypto, cryptodev and ZSTDIO
640 #####################################################################
643 # KSTACK_PAGES is the number of memory pages to assign to the kernel
644 # stack of each thread.
646 options KSTACK_PAGES=5
648 # Enable detailed accounting by the PV entry allocator.
652 #####################################################################
654 # More undocumented options for linting.
655 # Note that documenting these are not considered an affront.
657 options KBDIO_DEBUG=2
658 options KBD_MAXRETRY=4
659 options KBD_MAXWAIT=6
660 options KBD_RESETDELAY=201
664 options TIMER_FREQ=((14318182+6)/12)
667 options VM_KMEM_SIZE_MAX
668 options VM_KMEM_SIZE_SCALE
670 # GCOV (code coverage) support