FreeBSD/Linux Kernel Cross Reference
sys/i386/conf/MINIMAL

     #
     # MINIMAL -- Mostly Minimal kernel configuration file for FreeBSD/i386
     #
     # Many definitions of minimal are possible. The one this file follows is
     # GENERIC, minus all functionality that can be replaced by loading kernel
     # modules.
     #
     # Exceptions:
     # o While UFS is buildable as a module, the current module lacks
    #   some features (ACL, GJOURNAL) that GENERIC includes.
    # o acpi as a module has been reported flakey and not well tested, so
    #   is included in the kernel.
    # o (non-loaded) random is included due to uncertainty...
    # o Many networking things are included
    #
    # For now, please run changes to these list past imp@freebsd.org
    #
    # For more information on this file, please read the config(5) manual page,
    # and/or the handbook section on Kernel Configuration Files:
    #
    #    https://www.FreeBSD.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig-config.html
    #
    # The handbook is also available locally in /usr/share/doc/handbook
    # if you've installed the doc distribution, otherwise always see the
    # FreeBSD World Wide Web server (https://www.FreeBSD.org/) for the
    # latest information.
    #
    # An exhaustive list of options and more detailed explanations of the
    # device lines is also present in the ../../conf/NOTES and NOTES files.
    # If you are in doubt as to the purpose or necessity of a line, check first
    # in NOTES.
    #
    # $FreeBSD$
    
    cpu             I486_CPU
    cpu             I586_CPU
    cpu             I686_CPU
    ident           MINIMAL
    
    makeoptions     DEBUG=-g                # Build kernel with gdb(1) debug symbols
    makeoptions     WITH_CTF=1              # Run ctfconvert(1) for DTrace support
    
    options         SCHED_ULE               # ULE scheduler
    options         PREEMPTION              # Enable kernel thread preemption
    options         INET                    # InterNETworking
    options         INET6                   # IPv6 communications protocols
    options         TCP_OFFLOAD             # TCP offload
    options         SCTP_SUPPORT            # Allow kldload of SCTP
    options         FFS                     # Berkeley Fast Filesystem
    options         SOFTUPDATES             # Enable FFS soft updates support
    options         UFS_ACL                 # Support for access control lists
    options         UFS_DIRHASH             # Improve performance on big directories
    options         UFS_GJOURNAL            # Enable gjournal-based UFS journaling
    options         QUOTA                   # Enable disk quotas for UFS
    options         MD_ROOT                 # MD is a potential root device
    options         COMPAT_FREEBSD4         # Compatible with FreeBSD4
    options         COMPAT_FREEBSD5         # Compatible with FreeBSD5
    options         COMPAT_FREEBSD6         # Compatible with FreeBSD6
    options         COMPAT_FREEBSD7         # Compatible with FreeBSD7
    options         COMPAT_FREEBSD9         # Compatible with FreeBSD9
    options         COMPAT_FREEBSD10        # Compatible with FreeBSD10
    options         COMPAT_FREEBSD11        # Compatible with FreeBSD11
    options         COMPAT_FREEBSD12        # Compatible with FreeBSD12
    options         SCSI_DELAY=5000         # Delay (in ms) before probing SCSI
    options         KTRACE                  # ktrace(1) support
    options         STACK                   # stack(9) support
    options         SYSVSHM                 # SYSV-style shared memory
    options         SYSVMSG                 # SYSV-style message queues
    options         SYSVSEM                 # SYSV-style semaphores
    options         _KPOSIX_PRIORITY_SCHEDULING # POSIX P1003_1B real-time extensions
    options         PRINTF_BUFR_SIZE=128    # Prevent printf output being interspersed.
    options         KBD_INSTALL_CDEV        # install a CDEV entry in /dev
    options         HWPMC_HOOKS             # Necessary kernel hooks for hwpmc(4)
    options         AUDIT                   # Security event auditing
    options         CAPABILITY_MODE         # Capsicum capability mode
    options         CAPABILITIES            # Capsicum capabilities
    options         MAC                     # TrustedBSD MAC Framework
    options         KDTRACE_FRAME           # Ensure frames are compiled in
    options         KDTRACE_HOOKS           # Kernel DTrace hooks
    options         DDB_CTF                 # Kernel ELF linker loads CTF data
    options         INCLUDE_CONFIG_FILE     # Include this file in kernel
    
    # Debugging support.  Always need this:
    options         KDB                     # Enable kernel debugger support.
    options         KDB_TRACE               # Print a stack trace for a panic.
    
    # Make an SMP-capable kernel by default
    options         SMP                     # Symmetric MultiProcessor Kernel
    options         EARLY_AP_STARTUP
    device          apic
    
    # CPU frequency control
    device          cpufreq
    
    # Bus support.
    device          acpi
    device          pci
    
    # atkbdc0 controls both the keyboard and the PS/2 mouse
   device          atkbdc                  # AT keyboard controller
   device          atkbd                   # AT keyboard
   device          psm                     # PS/2 mouse
   
   device          kbdmux                  # keyboard multiplexer
   
   device          vga                     # VGA video card driver
   options         VESA                    # Add support for VESA BIOS Extensions (VBE)
   
   device          splash                  # Splash screen and screen saver support
   
   # syscons is the default console driver, resembling an SCO console
   device          sc
   options         SC_PIXEL_MODE           # add support for the raster text mode
   
   # vt is the new video console driver
   device          vt
   device          vt_vga
   device          vt_efifb
   device          vt_vbefb
   
   device          agp                     # support several AGP chipsets
   
   # Pseudo devices.
   device          loop                    # Network loopback
   device          padlock_rng             # VIA Padlock RNG
   device          rdrand_rng              # Intel Bull Mountain RNG
   device          ether                   # Ethernet support
   device          vlan                    # 802.1Q VLAN support
   device          tuntap                  # Packet tunnel.
   device          gif                     # IPv6 and IPv4 tunneling
   
   # The `bpf' device enables the Berkeley Packet Filter.
   # Be aware of the administrative consequences of enabling this!
   # Note that 'bpf' is required for DHCP.
   device          bpf                     # Berkeley packet filter
   
   # Xen HVM Guest Optimizations
   # NOTE: XENHVM depends on xenpci.  They must be added or removed together.
   options         XENHVM                  # Xen HVM kernel infrastructure
   device          xenpci                  # Xen HVM Hypervisor services driver
   
   # evdev interface
   options         EVDEV_SUPPORT           # evdev support in legacy drivers
   device          evdev                   # input event device support
   device          uinput                  # install /dev/uinput cdev

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