xref: /freebsd/sys/amd64/conf/MINIMAL (revision a8089ea5aee578e08acab2438e82fc9a9ae50ed8)
1#
2# MINIMAL -- Mostly Minimal kernel configuration file for FreeBSD/amd64
3#
4# Many definitions of minimal are possible. The one this file follows is
5# GENERIC, minus all functionality that can be replaced by loading kernel
6# modules.
7#
8# Exceptions:
9# o (non-loaded) random is included due to uncertainty...
10# o Many networking things are included
11#
12# For now, please run changes to these list past imp@freebsd.org
13#
14# For more information on this file, please read the config(5) manual page,
15# and/or the handbook section on Kernel Configuration Files:
16#
17#    https://docs.freebsd.org/en/books/handbook/kernelconfig/#kernelconfig-config
18#
19# The handbook is also available locally in /usr/share/doc/handbook
20# if you've installed the doc distribution, otherwise always see the
21# FreeBSD World Wide Web server (https://www.FreeBSD.org/) for the
22# latest information.
23#
24# An exhaustive list of options and more detailed explanations of the
25# device lines is also present in the ../../conf/NOTES and NOTES files.
26# If you are in doubt as to the purpose or necessity of a line, check first
27# in NOTES.
28#
29
30cpu		HAMMER
31ident		MINIMAL
32
33makeoptions	DEBUG=-g		# Build kernel with gdb(1) debug symbols
34makeoptions	WITH_CTF=1		# Run ctfconvert(1) for DTrace support
35
36options 	SCHED_ULE		# ULE scheduler
37options 	NUMA			# Non-Uniform Memory Architecture support
38options 	PREEMPTION		# Enable kernel thread preemption
39options 	VIMAGE			# Subsystem virtualization, e.g. VNET
40options 	INET			# InterNETworking
41options 	INET6			# IPv6 communications protocols
42options 	TCP_OFFLOAD		# TCP offload
43options 	SCTP_SUPPORT		# Allow kldload of SCTP
44options 	SOFTUPDATES		# Enable FFS soft updates support
45options 	UFS_ACL			# Support for access control lists
46options 	UFS_DIRHASH		# Improve performance on big directories
47options 	UFS_GJOURNAL		# Enable gjournal-based UFS journaling
48options 	QUOTA			# Enable disk quotas for UFS
49options 	MD_ROOT			# MD is a potential root device
50options 	GEOM_LABEL		# Provides labelization
51options 	COMPAT_FREEBSD32	# Compatible with i386 binaries
52options 	COMPAT_FREEBSD4		# Compatible with FreeBSD4
53options 	COMPAT_FREEBSD5		# Compatible with FreeBSD5
54options 	COMPAT_FREEBSD6		# Compatible with FreeBSD6
55options 	COMPAT_FREEBSD7		# Compatible with FreeBSD7
56options 	COMPAT_FREEBSD9		# Compatible with FreeBSD9
57options 	COMPAT_FREEBSD10	# Compatible with FreeBSD10
58options 	COMPAT_FREEBSD11	# Compatible with FreeBSD11
59options 	COMPAT_FREEBSD12	# Compatible with FreeBSD12
60options 	COMPAT_FREEBSD13	# Compatible with FreeBSD13
61options 	COMPAT_FREEBSD14	# Compatible with FreeBSD14
62options 	SCSI_DELAY=5000		# Delay (in ms) before probing SCSI
63options 	KTRACE			# ktrace(1) support
64options 	STACK			# stack(9) support
65options 	_KPOSIX_PRIORITY_SCHEDULING # POSIX P1003_1B real-time extensions
66options 	PRINTF_BUFR_SIZE=128	# Prevent printf output being interspersed.
67options 	KBD_INSTALL_CDEV	# install a CDEV entry in /dev
68options 	HWPMC_HOOKS		# Necessary kernel hooks for hwpmc(4)
69options 	AUDIT			# Security event auditing
70options 	CAPABILITY_MODE		# Capsicum capability mode
71options 	CAPABILITIES		# Capsicum capabilities
72options 	MAC			# TrustedBSD MAC Framework
73options 	KDTRACE_FRAME		# Ensure frames are compiled in
74options 	KDTRACE_HOOKS		# Kernel DTrace hooks
75options 	DDB_CTF			# Kernel ELF linker loads CTF data
76options 	INCLUDE_CONFIG_FILE	# Include this file in kernel
77
78# Debugging support.  Always need this:
79options 	KDB			# Enable kernel debugger support.
80options 	KDB_TRACE		# Print a stack trace for a panic.
81# For full debugger support use (turn off in stable branch):
82include "std.debug"
83
84# Make an SMP-capable kernel by default
85options 	SMP			# Symmetric MultiProcessor Kernel
86
87# CPU frequency control
88device		cpufreq
89
90# Bus support.
91device		acpi
92options 	IOMMU
93device		pci
94
95# atkbdc0 controls both the keyboard and the PS/2 mouse
96device		atkbdc			# AT keyboard controller
97device		atkbd			# AT keyboard
98device		psm			# PS/2 mouse
99
100device		kbdmux			# keyboard multiplexer
101
102# syscons is the legacy console driver, resembling an SCO console
103device		vga			# VGA video card driver
104device		splash			# Splash screen and screen saver support
105device		sc
106options 	SC_PIXEL_MODE		# add support for the raster text mode
107
108# vt is the default video console driver
109device		vt
110device		vt_vga
111device		vt_efifb
112device		vt_vbefb
113
114device		agp			# support several AGP chipsets
115
116# Serial (COM) ports
117device		uart			# Generic UART driver
118
119# Pseudo devices.
120device		loop			# Network loopback
121device		padlock_rng		# VIA Padlock RNG
122device		rdrand_rng		# Intel Bull Mountain RNG
123device		ether			# Ethernet support
124
125# The `bpf' device enables the Berkeley Packet Filter.
126# Be aware of the administrative consequences of enabling this!
127# Note that 'bpf' is required for DHCP.
128device		bpf			# Berkeley packet filter
129
130# VirtIO support
131device		virtio			# Generic VirtIO bus (required)
132device		virtio_pci		# VirtIO PCI device
133device		vtnet			# VirtIO Ethernet device
134device		virtio_blk		# VirtIO Block device
135device		virtio_balloon		# VirtIO Memory Balloon device
136
137# Linux KVM paravirtualization support
138device		kvm_clock		# KVM paravirtual clock driver
139
140# Xen HVM Guest Optimizations
141# NOTE: XENHVM depends on xenpci and xentimer.
142# They must be added or removed together.
143options 	XENHVM			# Xen HVM kernel infrastructure
144device		xenefi			# Xen EFI timer device
145device		xenpci			# Xen HVM Hypervisor services driver
146device		xentimer		# Xen x86 PV timer device
147
148# evdev interface
149options 	EVDEV_SUPPORT		# evdev support in legacy drivers
150device		evdev			# input event device support
151device		uinput			# install /dev/uinput cdev
152