freebsd/sys/amd64/conf/NOTES

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#
# 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
#
# 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