NOTES (revision 7899f917b1c0ea178f1d2be0cfb452086d079d23) - OpenGrok cross reference for /freebsd/sys/x86/conf/NOTES

#

# Common NOTES between i386 and amd64

#
# Enable the kernel DTrace hooks which are required to load the DTrace
# kernel modules.
#
options 	KDTRACE_HOOKS

# DTrace core
# NOTE: introduces CDDL-licensed components into the kernel
#device		dtrace

# DTrace modules
#device		dtrace_profile
#device		dtrace_sdt
#device		dtrace_fbt
#device		dtrace_systrace
#device		dtrace_prototype
#device		dtnfscl
#device		dtmalloc

# Alternatively include all the DTrace modules
#device		dtraceall


#####################################################################
# SMP OPTIONS:
#
# Notes:
#
# IPI_PREEMPTION instructs the kernel to preempt threads running on other
# CPUS if needed.  Relies on the PREEMPTION option

# Optional:
options 	IPI_PREEMPTION

# Debugging options.
#
options 	COUNT_XINVLTLB_HITS	# Counters for TLB events
options 	COUNT_IPIS		# Per-CPU IPI interrupt counters


#####################################################################
# COMPATIBILITY OPTIONS

# Implement system calls compatible with 4.3BSD and FreeBSD 1.x,
# and 2.x a.out binaries. Not needed for ELF binaries, or newer
# a.out binaries.
options 	COMPAT_43


#####################################################################
# NETWORKING OPTIONS

#
# DEVICE_POLLING adds support for mixed interrupt-polling handling
# of network device drivers, which has significant benefits in terms
# of robustness to overloads and responsivity, as well as permitting
# accurate scheduling of the CPU time between kernel network processing
# and other activities.  The drawback is a moderate (up to 1/HZ seconds)
# potential increase in response times.
# It is strongly recommended to use HZ=1000 or 2000 with DEVICE_POLLING
# to achieve smoother behaviour.
# Additionally, you can enable/disable polling at runtime with help of
# the ifconfig(8) utility, and select the CPU fraction reserved to
# userland with the sysctl variable kern.polling.user_frac
# (default 50, range 0..100).
#
# Not all device drivers support this mode of operation at the time of
# this writing.  See polling(4) for more details.

options 	DEVICE_POLLING

# BPF_JITTER adds support for BPF just-in-time compiler.

options 	BPF_JITTER


#####################################################################
# CLOCK OPTIONS

# Provide read/write access to the memory in the clock chip.
device		nvram		# Access to rtc cmos via /dev/nvram


#####################################################################
# MISCELLANEOUS DEVICES AND OPTIONS

device		speaker		#Play IBM BASIC-style noises out your speaker
envvar		hint.speaker.0.at="isa"
envvar		hint.speaker.0.port="0x61"


#####################################################################
# HARDWARE BUS CONFIGURATION

options 	IOMMU			# Enable IOMMU support

#
# ISA bus
#
device		isa

#
# Options for `isa':
#
# AUTO_EOI_1 enables the `automatic EOI' feature for the master 8259A
# interrupt controller.  This saves about 0.7-1.25 usec for each interrupt.
# This option breaks suspend/resume on some portables.
#
# AUTO_EOI_2 enables the `automatic EOI' feature for the slave 8259A
# interrupt controller.  This saves about 0.7-1.25 usec for each interrupt.
# Automatic EOI is documented not to work for the slave with the
# original i8259A, but it works for some clones and some integrated
# versions.
#
# MAXMEM specifies the amount of RAM on the machine; if this is not
# specified, FreeBSD will first read the amount of memory from the CMOS
# RAM, so the amount of memory will initially be limited to 64MB or 16MB
# depending on the BIOS.  If the BIOS reports 64MB, a memory probe will
# then attempt to detect the installed amount of RAM.  If this probe
# fails to detect >64MB RAM you will have to use the MAXMEM option.
# The amount is in kilobytes, so for a machine with 128MB of RAM, it would
# be 131072 (128 * 1024).
#
# BROKEN_KEYBOARD_RESET disables the use of the keyboard controller to
# reset the CPU for reboot.  This is needed on some systems with broken
# keyboard controllers.

options 	AUTO_EOI_1
#options 	AUTO_EOI_2

options 	MAXMEM=(128*1024)
#options 	BROKEN_KEYBOARD_RESET

#
# AGP GART support
device		agp

# AGP debugging.
options 	AGP_DEBUG

#
# ACPI support using the Intel ACPI Component Architecture reference
# implementation.
#
# ACPI_DEBUG enables the use of the debug.acpi.level and debug.acpi.layer
# kernel environment variables to select initial debugging levels for the
# Intel ACPICA code.  (Note that the Intel code must also have USE_DEBUGGER
# defined when it is built).

device		acpi
options 	ACPI_DEBUG

# ACPI WMI Mapping driver
device		acpi_wmi

# ACPI Asus Extras (LCD backlight/brightness, video output, etc.)
device		acpi_asus

# ACPI Fujitsu Extras (Buttons)
device		acpi_fujitsu

# ACPI extras driver for HP laptops
device		acpi_hp

# ACPI extras driver for IBM laptops
device		acpi_ibm

# ACPI Panasonic Extras (LCD backlight/brightness, video output, etc.)
device		acpi_panasonic

# ACPI Sony extra (LCD brightness)
device		acpi_sony

# ACPI Toshiba Extras (LCD backlight/brightness, video output, etc.)
device		acpi_toshiba

# ACPI Video Extensions (LCD backlight/brightness, video output, etc.)
device		acpi_video

# ACPI Docking Station
device		acpi_dock

# ACPI ASOC ATK0110 ASUSTeK AI Booster (voltage, temperature and fan sensors)
device		aibs


#####################################################################
# HARDWARE DEVICE CONFIGURATION

#
# Optional devices:
#

# The syscons console driver (SCO color console compatible).
device		sc
envvar		hint.sc.0.at="isa"
options 	MAXCONS=16		# number of virtual consoles
options 	SC_ALT_MOUSE_IMAGE	# simplified mouse cursor in text mode
options 	SC_DFLT_FONT		# compile font in
makeoptions	SC_DFLT_FONT=cp850
options 	SC_DFLT_TERM=\"sc\"	# default terminal emulator
options 	SC_DISABLE_KDBKEY	# disable `debug' key
options 	SC_DISABLE_REBOOT	# disable reboot key sequence
options 	SC_HISTORY_SIZE=200	# number of history buffer lines
options 	SC_MOUSE_CHAR=0x3	# char code for text mode mouse cursor
options 	SC_PIXEL_MODE		# add support for the raster text mode

# The following options will let you change the default colors of syscons.
options 	SC_NORM_ATTR=(FG_GREEN|BG_BLACK)
options 	SC_NORM_REV_ATTR=(FG_YELLOW|BG_GREEN)
options 	SC_KERNEL_CONS_ATTR=(FG_RED|BG_BLACK)
options 	SC_KERNEL_CONS_ATTRS=\"\x0c\x0d\x0e\x0f\x02\x09\x0a\x0b\"
options 	SC_KERNEL_CONS_REV_ATTR=(FG_BLACK|BG_RED)

# The following options will let you change the default behavior of
# cut-n-paste feature
options 	SC_CUT_SPACES2TABS	# convert leading spaces into tabs
options 	SC_CUT_SEPCHARS=\"x09\"	# set of characters that delimit words
					# (default is single space - \"x20\")

# If you have a two button mouse, you may want to add the following option
# to use the right button of the mouse to paste text.
options 	SC_TWOBUTTON_MOUSE

# You can selectively disable features in syscons.
options 	SC_NO_CUTPASTE
options 	SC_NO_FONT_LOADING
options 	SC_NO_HISTORY
options 	SC_NO_MODE_CHANGE
options 	SC_NO_SYSMOUSE
options 	SC_NO_SUSPEND_VTYSWITCH
#!options 	SC_NO_TERM_DUMB
#!options 	SC_NO_TERM_SC
#!options 	SC_NO_TERM_SCTEKEN

# `flags' for sc
#	0x80	Put the video card in the VESA 800x600 dots, 16 color mode
#	0x100	Probe for a keyboard device periodically if one is not present

# Splash screen and screen saver support
device		splash

# Various screen savers.
device		blank_saver
device		daemon_saver
device		dragon_saver
device		fade_saver
device		fire_saver
device		green_saver
device		logo_saver
device		rain_saver
device		snake_saver
device		star_saver
device		warp_saver

# To include support for VGA VESA video modes
options 	VESA

# Turn on extra debugging checks and output for VESA support.
options 	VESA_DEBUG

device		dpms		# DPMS suspend & resume via VESA BIOS

# x86 real mode BIOS emulator, required by atkbdc/dpms/vesa
options 	X86BIOS

# PS/2 mouse
device		psm
envvar		hint.psm.0.at="atkbdc"
envvar		hint.psm.0.irq="12"

# Options for psm:
options 	PSM_HOOKRESUME		#hook the system resume event, useful
					#for some laptops
options 	PSM_RESETAFTERSUSPEND	#reset the device at the resume event

# The keyboard controller; it controls the keyboard and the PS/2 mouse.
device		atkbdc
envvar		hint.atkbdc.0.at="isa"
envvar		hint.atkbdc.0.port="0x060"

# The AT keyboard
device		atkbd
envvar		hint.atkbd.0.at="atkbdc"
envvar		hint.atkbd.0.irq="1"

# Options for atkbd:
options 	ATKBD_DFLT_KEYMAP	# specify the built-in keymap
makeoptions	ATKBD_DFLT_KEYMAP=fr.dvorak

# `flags' for atkbd:
#       0x01    Force detection of keyboard, else we always assume a keyboard
#       0x02    Don't reset keyboard, useful for some newer ThinkPads
#	0x03	Force detection and avoid reset, might help with certain
#		dockingstations
#       0x04    Old-style (XT) keyboard support, useful for older ThinkPads

# Video card driver for VGA adapters.
device		vga
envvar		hint.vga.0.at="isa"

# Options for vga:
# Try the following option if the mouse pointer is not drawn correctly
# or font does not seem to be loaded properly.  May cause flicker on
# some systems.
options 	VGA_ALT_SEQACCESS

# If you can dispense with some vga driver features, you may want to
# use the following options to save some memory.
#options 	VGA_NO_FONT_LOADING	# don't save/load font
#options 	VGA_NO_MODE_CHANGE	# don't change video modes

# Older video cards may require this option for proper operation.
options 	VGA_SLOW_IOACCESS	# do byte-wide i/o's to TS and GDC regs

# The following option probably won't work with the LCD displays.
options 	VGA_WIDTH90		# support 90 column modes

# Debugging.
options 	VGA_DEBUG

# vt(4) drivers.
device		vt_vga		# VGA
device		vt_vbefb	# VBE framebuffer

# Linear framebuffer driver for S3 VESA 1.2 cards. Works on top of VESA.
device		s3pci

#
# RAID adapters
#

#
# Areca 11xx and 12xx series of SATA II RAID controllers.
# CAM is required.
#
device		arcmsr		# Areca SATA II RAID

#
# Adaptec FSA RAID controllers, including integrated DELL controllers,
# the Dell PERC 2/QC and the HP NetRAID-4M
device		aac
device		aacp	# SCSI Passthrough interface (optional, CAM required)

#
# Highpoint RocketRAID 27xx.
device		hpt27xx

#
# Highpoint RocketRAID 182x.
device		hptmv

#
# Highpoint DC7280 and R750.
device		hptnr

#
# Highpoint RocketRAID.  Supports RR172x, RR222x, RR2240, RR232x, RR2340,
# RR2210, RR174x, RR2522, RR231x, RR230x.
device		hptrr

#
# Highpoint RocketRaid 3xxx series SATA RAID
device		hptiop

#
# IBM (now Adaptec) ServeRAID controllers
device		ips

#
# Intel C600 (Patsburg) integrated SAS controller
device		isci
options 	ISCI_LOGGING	# enable debugging in isci HAL

#
# Intel Volume Management Device (VMD) support
device		vmd

#
# PMC-Sierra SAS/SATA controller
device		pmspcv

#
# Standard floppy disk controllers and floppy tapes, supports
# the Y-E DATA External FDD (PC Card)
#
device		fdc
envvar		hint.fdc.0.at="isa"
envvar		hint.fdc.0.port="0x3F0"
envvar		hint.fdc.0.irq="6"
envvar		hint.fdc.0.drq="2"
#
# FDC_DEBUG enables floppy debugging.  Since the debug output is huge, you
# gotta turn it actually on by setting the variable fd_debug with DDB,
# however.
options 	FDC_DEBUG
#
# Activate this line if you happen to have an Insight floppy tape.
# Probing them proved to be dangerous for people with floppy disks only,
# so it's "hidden" behind a flag:
#hint.fdc.0.flags="1"

# Specify floppy devices
envvar		hint.fd.0.at="fdc0"
envvar		hint.fd.0.drive="0"
envvar		hint.fd.1.at="fdc0"
envvar		hint.fd.1.drive="1"

# The cpufreq(4) driver provides support for non-ACPI CPU frequency control
device		cpufreq

#
# Network interfaces:
#

# bxe:  Broadcom NetXtreme II (BCM5771X/BCM578XX) PCIe 10Gb Ethernet
#       adapters.
# gve:	Google Virtual NIC (gVNIC)
# igc:	Intel I225 2.5Gb Ethernet adapter
# ipw:	Intel PRO/Wireless 2100 IEEE 802.11 adapter
#	Requires the ipw firmware module
# iwi:	Intel PRO/Wireless 2200BG/2225BG/2915ABG IEEE 802.11 adapters
#	Requires the iwi firmware module
# iwn:	Intel Wireless WiFi Link 1000/105/135/2000/4965/5000/6000/6050 abgn
#	802.11 network adapters
#	Requires the iwn firmware module
# mthca: Mellanox HCA InfiniBand
# mlx4ib: Mellanox ConnectX HCA InfiniBand
# mlx4en: Mellanox ConnectX HCA Ethernet
# nfe:	nVidia nForce MCP on-board Ethernet Networking (BSD open source)
# vmx:	VMware VMXNET3 Ethernet (BSD open source)
# wpi:	Intel 3945ABG Wireless LAN controller
#	Requires the wpi firmware module

device		bxe		# Broadcom NetXtreme II BCM5771X/BCM578XX 10GbE
device		gve		# Google Virtual NIC (gVNIC)
device		igc		# Intel I225 2.5G Ethernet
device		ipw		# Intel 2100 wireless NICs.
device		iwi		# Intel 2200BG/2225BG/2915ABG wireless NICs.
device		iwn		# Intel 4965/1000/5000/6000 wireless NICs.
device  	mthca		# Mellanox HCA InfiniBand
device  	mlx4		# Shared code module between IB and Ethernet
device  	mlx4ib		# Mellanox ConnectX HCA InfiniBand
device  	mlx4en		# Mellanox ConnectX HCA Ethernet
device		nfe		# nVidia nForce MCP on-board Ethernet
device		vmx		# VMware VMXNET3 Ethernet
device		wpi		# Intel 3945ABG wireless NICs.

# IEEE 802.11 adapter firmware modules

# Intel PRO/Wireless 2100 firmware:
#   ipwfw:		BSS/IBSS/monitor mode firmware
#   ipwbssfw:		BSS mode firmware
#   ipwibssfw:		IBSS mode firmware
#   ipwmonitorfw:	Monitor mode firmware
# Intel PRO/Wireless 2200BG/2225BG/2915ABG firmware:
#   iwifw:		BSS/IBSS/monitor mode firmware
#   iwibssfw:		BSS mode firmware
#   iwiibssfw:		IBSS mode firmware
#   iwimonitorfw:	Monitor mode firmware
# Intel Wireless WiFi Link 4965/1000/5000/6000 series firmware:
#   iwnfw:		Single module to support all devices
#   iwn1000fw:		Specific module for the 1000 only
#   iwn105fw:		Specific module for the 105 only
#   iwn135fw:		Specific module for the 135 only
#   iwn2000fw:		Specific module for the 2000 only
#   iwn2030fw:		Specific module for the 2030 only
#   iwn4965fw:		Specific module for the 4965 only
#   iwn5000fw:		Specific module for the 5000 only
#   iwn5150fw:		Specific module for the 5150 only
#   iwn6000fw:		Specific module for the 6000 only
#   iwn6000g2afw:	Specific module for the 6000g2a only
#   iwn6000g2bfw:	Specific module for the 6000g2b only
#   iwn6050fw:		Specific module for the 6050 only
# wpifw:	Intel 3945ABG Wireless LAN Controller firmware

device		iwifw
device		iwibssfw
device		iwiibssfw
device		iwimonitorfw
device		ipwfw
device		ipwbssfw
device		ipwibssfw
device		ipwmonitorfw
device		iwnfw
device		iwn1000fw
device		iwn105fw
device		iwn135fw
device		iwn2000fw
device		iwn2030fw
device		iwn4965fw
device		iwn5000fw
device		iwn5150fw
device		iwn6000fw
device		iwn6000g2afw
device		iwn6000g2bfw
device		iwn6050fw
device		wpifw

#
# Non-Transparent Bridge (NTB) drivers
#
device		if_ntb		# Virtual NTB network interface
device		ntb_transport	# NTB packet transport driver
device		ntb		# NTB hardware interface
device		ntb_hw_amd	# AMD NTB hardware driver
device		ntb_hw_intel	# Intel NTB hardware driver
device		ntb_hw_plx	# PLX NTB hardware driver

#####################################################################

#
# Miscellaneous hardware:
#
# ipmi: Intelligent Platform Management Interface
# pbio: Parallel (8255 PPI) basic I/O (mode 0) port (e.g. Advantech PCL-724)
# smbios: DMI/SMBIOS entry point (requires EFIRT option)
# vpd: Vital Product Data kernel interface
# asmc: Apple System Management Controller
# si: Specialix International SI/XIO or SX intelligent serial card
# tpm: Trusted Platform Module

# Notes on the Specialix SI/XIO driver:
#  The host card is memory, not IO mapped.
#  The Rev 1 host cards use a 64K chunk, on a 32K boundary.
#  The Rev 2 host cards use a 32K chunk, on a 32K boundary.
#  The cards can use an IRQ of 11, 12 or 15.

device		ipmi
device		pbio
envvar		hint.pbio.0.at="isa"
envvar		hint.pbio.0.port="0x360"
device		smbios
device		vpd
device		asmc
device		tpm
device		padlock_rng	# VIA Padlock RNG
device		rdrand_rng	# Intel Bull Mountain RNG
device		aesni		# AES-NI OpenCrypto module
device		ossl		# OpenSSL OpenCrypto module

# Linux KVM paravirtualization support
device		kvm_clock	# KVM paravirtual clock driver

# Microsoft Hyper-V enhancement support
device 		hyperv		# HyperV drivers
device		hvhid		# HyperV HID device

# VMware hypervisor support
device		pvscsi		# Paravirtual SCSI driver
device		vmci		# Virtual Machine Communication Interface (VMCI)
device		vmware_guestrpc	# GuestRPC interface

#
# Laptop/Notebook options:
#

device backlight

#
# System Management Bus (SMB)
#
# Supported SMB interfaces:
# imcsmb	integrated Memory Controller (iMC) SMBus controller
#		Sandybridge-Xeon, Ivybridge-Xeon, Haswell-Xeon, Broadwell-Xeon
#

device		imcsmb

#
# HID-over-I2C support
#
device		iichid		# HID-over-I2C support
options 	IICHID_DEBUG	# Enable HID-over-I2C debug messages
options 	IICHID_SAMPLING	# Workaround missing GPIO INTR support

#
# AMD System Management Network (SMN)
#
device		amdsmn

#
# Hardware watchdog timers:
#
# ichwd: Intel ICH watchdog timer
# amdsbwd: AMD SB7xx watchdog timer
# viawd: VIA south bridge watchdog timer
# wbwd: Winbond watchdog timer
# itwd: ITE Super I/O watchdog timer
#
device		ichwd
device		amdsbwd
device		viawd
device		wbwd
device		itwd

#
# Temperature sensors:
#
# coretemp: on-die sensor on Intel Core and newer CPUs
# amdtemp: on-die sensor on AMD K8/K10/K11 CPUs
#
device		coretemp
device		amdtemp

#
# CPU control pseudo-device. Provides access to MSRs, CPUID info and
# microcode update feature.
#
device		cpuctl

#
# SuperIO driver.
#
device		superio

#####################################################################

# More undocumented options for linting.
# Note that documenting these are not considered an affront.

options 	KBDIO_DEBUG=2
options 	KBD_MAXRETRY=4
options 	KBD_MAXWAIT=6
options 	KBD_RESETDELAY=201

options 	PSM_DEBUG=1

options 	TIMER_FREQ=((14318182+6)/12)

options 	VM_KMEM_SIZE
options 	VM_KMEM_SIZE_MAX
options 	VM_KMEM_SIZE_SCALE