xref: /freebsd/sys/amd64/conf/NOTES (revision 2f721943bf20e53b0ba7b5032a2900d0beb67413)

#
# NOTES -- Lines that can be cut/pasted into kernel and hints configs.
#
# This file contains machine dependent kernel configuration notes.  For
# machine independent notes, look in /sys/conf/NOTES.  For notes shared
# with i386, look in /sys/x86/conf/NOTES.
#
#

# GCOV (code coverage) support

options 	LINDEBUGFS
options 	GCOV


#####################################################################
# SMP OPTIONS:

# Optional:
device		atpic			# Optional legacy pic support
device		mptable			# Optional MPSPEC mptable support


#####################################################################
# CPU OPTIONS

#
# You must specify at least one CPU (the one you intend to run on);
# deleting the specification for CPUs you don't need to use may make
# parts of the system run faster.
#
cpu		HAMMER			# aka K8, aka Opteron & Athlon64

#
# Options for CPU features.
#


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

#
# Optional devices:
#

# vt(4) drivers.
device		vt_efifb	# EFI framebuffer

# 3Dfx Voodoo Graphics, Voodoo II /dev/3dfx CDEV support.  This will create
# the /dev/3dfx0 device to work with glide implementations.  This should get
# linked to /dev/3dfx and /dev/voodoo.  Note that this is not the same as
# the tdfx DRI module from XFree86 and is completely unrelated.
#

device		tdfx			# Enable 3Dfx Voodoo support

#
# RAID adapters
#

#XXX this stores pointers in a 32bit field that is defined by the hardware
#device	pst

#
# Microsemi smartpqi controllers.
# These controllers have a SCSI-like interface, and require the
# CAM infrastructure.
#
device		smartpqi

# Broadcom MPT Fusion, version 4, is 64-bit only
device		mpi3mr			# LSI-Logic MPT-Fusion 4

#
# Network interfaces:
#

# axp: AMD EPYC integrated NIC
#	Requires the miibus module
# ice:	Intel 800 Series Physical Function
#	Requires the ice_ddp module for full functionality
# irdma: Intel 800 Series RDMA driver
#        Requires the ice module
# qlxgb: QLogic 3200 and 8200 series 10 Gigabit Ethernet & CNA Adapter
# qlxgbe: QLogic 8300 series 10 Gigabit Ethernet & CNA Adapter
# qlxge: QLogic 8100 series 10 Gigabit Ethernet & CNA Adapter
# qlnxe: Cavium QLogic 41000/45000 series 10/25/40/100 Gigabit Ethernet & CNA Adapter
# sfxge: Solarflare SFC9000 family 10Gb Ethernet adapters

device		axp		# AMD EPYC integrated NIC
device		ixl		# Intel 700 Series Physical Function
device		iavf		# Intel Adaptive Virtual Function
device		ice		# Intel 800 Series Physical Function
device		ice_ddp		# Intel 800 Series DDP Package
device		irdma		# Intel 800 Series RDMA driver
device		qlxgb		# QLogic 3200/8200 Ethernet
device		qlxgbe		# QLogic 8300 Ethernet
device		qlxge		# QLogic 8100 Ethernet
device		qlnxe		# QLogic 41000/45000 Ethernet
device		sfxge		# Solarflare SFC9000 10Gb Ethernet

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

#
# Miscellaneous hardware:
#

device		ioat		# Intel I/OAT DMA engine

# EFI Runtime Services support
options 	EFIRT

# EFI pseudo-device
device		efidev

# EFI RTC
device		efirtc

#
# Intel QuickAssist driver with OpenCrypto support
#
# Only for legacy Atom C2XXX chipsets.
device		qat_c2xxx

# Xen HVM Guest Optimizations
options 	XENHVM		# Xen HVM kernel infrastructure
device		xenefi		# Xen EFI timer device
device 		xenpci		# Xen HVM Hypervisor services driver
device		xentimer	# Xen x86 PV timer device

#####################################################################
# ABI Emulation

# Enable 32-bit runtime support for FreeBSD/i386 binaries.
options 	COMPAT_FREEBSD32

# Enable (32-bit) a.out binary support
options 	COMPAT_AOUT

#####################################################################
# ZFS support

# NB: This depends on crypto, cryptodev and ZSTDIO
options 	ZFS

#####################################################################
# VM OPTIONS

#
# Number of initial kernel page table pages used for early bootstrap.
# This number should include enough pages to map the kernel and any
# modules or other data loaded with the kernel by the loader.  Each
# page table page maps 2MB.
#
options 	NKPT=31

# KSTACK_PAGES is the number of memory pages to assign to the kernel
# stack of each thread.

options 	KSTACK_PAGES=5

# Enable detailed accounting by the PV entry allocator.

options 	PV_STATS

#####################################################################
# Kernel sanitizers

#options	COVERAGE		# Generic kernel coverage. Used by KCOV
#options	KCOV			# Kernel Coverage Sanitizer
# Warning: KUBSAN can result in a kernel too large for loader to load
#options	KUBSAN			# Kernel Undefined Behavior Sanitizer
#options	KCSAN			# Kernel Concurrency Sanitizer
#options	KASAN			# Kernel Address Sanitizer
#options	KCSAN			# Kernel Concurrency Sanitizer
#options	KMSAN			# Kernel Memory Sanitizer