2 # MINIMAL -- Mostly Minimal kernel configuration file for FreeBSD/amd64
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
9 # o While UFS is buildable as a module, the current module lacks
10 # some features (ACL, GJOURNAL) that GENERIC includes.
11 # o acpi as a module has been reported flakey and not well tested, so
12 # is included in the kernel.
13 # o random is included due to uncertaty...
14 # o Many networking things are included
16 # For now, please run changes to these list past imp@freebsd.org
18 # For more information on this file, please read the config(5) manual page,
19 # and/or the handbook section on Kernel Configuration Files:
21 # http://www.FreeBSD.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig-config.html
23 # The handbook is also available locally in /usr/share/doc/handbook
24 # if you've installed the doc distribution, otherwise always see the
25 # FreeBSD World Wide Web server (http://www.FreeBSD.org/) for the
28 # An exhaustive list of options and more detailed explanations of the
29 # device lines is also present in the ../../conf/NOTES and NOTES files.
30 # If you are in doubt as to the purpose or necessity of a line, check first
38 makeoptions DEBUG=-g # Build kernel with gdb(1) debug symbols
39 makeoptions WITH_CTF=1 # Run ctfconvert(1) for DTrace support
41 options SCHED_ULE # ULE scheduler
42 options PREEMPTION # Enable kernel thread preemption
43 options INET # InterNETworking
44 options INET6 # IPv6 communications protocols
45 options TCP_OFFLOAD # TCP offload
46 options SCTP # Stream Control Transmission Protocol
47 options FFS # Berkeley Fast Filesystem
48 options SOFTUPDATES # Enable FFS soft updates support
49 options UFS_ACL # Support for access control lists
50 options UFS_DIRHASH # Improve performance on big directories
51 options UFS_GJOURNAL # Enable gjournal-based UFS journaling
52 options QUOTA # Enable disk quotas for UFS
53 options MD_ROOT # MD is a potential root device
54 options COMPAT_FREEBSD32 # Compatible with i386 binaries
55 options COMPAT_FREEBSD4 # Compatible with FreeBSD4
56 options COMPAT_FREEBSD5 # Compatible with FreeBSD5
57 options COMPAT_FREEBSD6 # Compatible with FreeBSD6
58 options COMPAT_FREEBSD7 # Compatible with FreeBSD7
59 options COMPAT_FREEBSD9 # Compatible with FreeBSD9
60 options COMPAT_FREEBSD10 # Compatible with FreeBSD10
61 options COMPAT_FREEBSD11 # Compatible with FreeBSD11
62 options SCSI_DELAY=5000 # Delay (in ms) before probing SCSI
63 options KTRACE # ktrace(1) support
64 options STACK # stack(9) support
65 options SYSVSHM # SYSV-style shared memory
66 options SYSVMSG # SYSV-style message queues
67 options SYSVSEM # SYSV-style semaphores
68 options _KPOSIX_PRIORITY_SCHEDULING # POSIX P1003_1B real-time extensions
69 options PRINTF_BUFR_SIZE=128 # Prevent printf output being interspersed.
70 options KBD_INSTALL_CDEV # install a CDEV entry in /dev
71 options HWPMC_HOOKS # Necessary kernel hooks for hwpmc(4)
72 options AUDIT # Security event auditing
73 options CAPABILITY_MODE # Capsicum capability mode
74 options CAPABILITIES # Capsicum capabilities
75 options MAC # TrustedBSD MAC Framework
76 options KDTRACE_FRAME # Ensure frames are compiled in
77 options KDTRACE_HOOKS # Kernel DTrace hooks
78 options DDB_CTF # Kernel ELF linker loads CTF data
79 options INCLUDE_CONFIG_FILE # Include this file in kernel
81 # Debugging support. Always need this:
82 options KDB # Enable kernel debugger support.
83 options KDB_TRACE # Print a stack trace for a panic.
84 # For full debugger support use (turn off in stable branch):
85 options DDB # Support DDB.
86 options GDB # Support remote GDB.
87 options DEADLKRES # Enable the deadlock resolver
88 options INVARIANTS # Enable calls of extra sanity checking
89 options INVARIANT_SUPPORT # Extra sanity checks of internal structures, required by INVARIANTS
90 options WITNESS # Enable checks to detect deadlocks and cycles
91 options WITNESS_SKIPSPIN # Don't run witness on spinlocks for speed
92 options MALLOC_DEBUG_MAXZONES=8 # Separate malloc(9) zones
94 # Make an SMP-capable kernel by default
95 options SMP # Symmetric MultiProcessor Kernel
96 options DEVICE_NUMA # I/O Device Affinity
97 options EARLY_AP_STARTUP
99 # CPU frequency control
107 # atkbdc0 controls both the keyboard and the PS/2 mouse
108 device atkbdc # AT keyboard controller
109 device atkbd # AT keyboard
110 device psm # PS/2 mouse
112 device kbdmux # keyboard multiplexer
114 device vga # VGA video card driver
115 options VESA # Add support for VESA BIOS Extensions (VBE)
117 device splash # Splash screen and screen saver support
119 # syscons is the default console driver, resembling an SCO console
121 options SC_PIXEL_MODE # add support for the raster text mode
123 # vt is the new video console driver
128 device agp # support several AGP chipsets
131 device loop # Network loopback
132 device random # Entropy device
133 device padlock_rng # VIA Padlock RNG
134 device rdrand_rng # Intel Bull Mountain RNG
135 device ether # Ethernet support
136 device vlan # 802.1Q VLAN support
137 device tun # Packet tunnel.
138 device gif # IPv6 and IPv4 tunneling
140 # The `bpf' device enables the Berkeley Packet Filter.
141 # Be aware of the administrative consequences of enabling this!
142 # Note that 'bpf' is required for DHCP.
143 device bpf # Berkeley packet filter
145 # Xen HVM Guest Optimizations
146 # NOTE: XENHVM depends on xenpci. They must be added or removed together.
147 options XENHVM # Xen HVM kernel infrastructure
148 device xenpci # Xen HVM Hypervisor services driver