xref: /freebsd/sys/conf/options (revision 2c8f5a28bb570b78fa11b8e457e9b6624e3b7520)

# $FreeBSD$
#
#        On the handling of kernel options
#
# All kernel options should be listed in NOTES, with suitable
# descriptions.  Negative options (options that make some code not
# compile) should be commented out; LINT (generated from NOTES) should
# compile as much code as possible.  Try to structure option-using
# code so that a single option only switch code on, or only switch
# code off, to make it possible to have a full compile-test.  If
# necessary, you can check for COMPILING_LINT to get maximum code
# coverage.
#
# All new options shall also be listed in either "conf/options" or
# "conf/options.<machine>".  Options that affect a single source-file
# <xxx>.[c|s] should be directed into "opt_<xxx>.h", while options
# that affect multiple files should either go in "opt_global.h" if
# this is a kernel-wide option (used just about everywhere), or in
# "opt_<option-name-in-lower-case>.h" if it affect only some files.
# Note that the effect of listing only an option without a
# header-file-name in conf/options (and cousins) is that the last
# convention is followed.
#
# This handling scheme is not yet fully implemented.
#
#
# Format of this file:
# Option name	filename
#
# If filename is missing, the default is
# opt_<name-of-option-in-lower-case>.h

# Adaptec Array Controller driver options
AAC_COMPAT_LINUX	opt_aac.h	# Enable the linux ioctl interface

AAC_DEBUG		opt_aac.h	# Debugging levels:
					# 0 - quiet, only emit warnings
					# 1 - noisy, emit major function
					#     points and things done
					# 2 - extremely noisy, emit trace
					#     items in loops, etc.

# Adaptec aic7xxx SCSI controller options
AHC_ALLOW_MEMIO		opt_aic7xxx.h	# Allow PCI devices to use memory
					# mapped I/O

AHC_TMODE_ENABLE	opt_aic7xxx.h	# Bitmap of units to enable
					# targetmode operations.

AHC_DUMP_EEPROM		opt_aic7xxx.h	# Dump the contents of our
					# configuration prom.

AHC_DEBUG_SEQUENCER	opt_aic7xxx.h	# Enable diagnostic sequencer code

# Adaptec aic79xx SCSI controller options
AHD_DEBUG		opt_aic79xx.h	# Compile in aic79xx debugging code.

AHD_DEBUG_OPTS		opt_aic79xx.h	# Aic79xx driver debugging options.
					# See sys/dev/aic79xx/aic79xx.h

ADW_ALLOW_MEMIO		opt_adw.h	# Allow PCI devices to use memory
					# mapped I/O

# Miscellaneous options.
GEOM		opt_geom.h

ADAPTIVE_MUTEXES
COMPAT_43	opt_compat.h
COMPAT_SUNOS	opt_compat.h
COMPILING_LINT	opt_global.h
CY_PCI_FASTINTR
CONSPEED	opt_comconsole.h
DDB
DDB_NOKLDSYM	opt_ddb.h
DDB_UNATTENDED	opt_ddb.h
GDB_REMOTE_CHAT	opt_ddb.h
GDBSPEED	opt_ddb.h
NODEVFS		opt_devfs.h
HW_WDOG
KTRACE
KTRACE_REQUEST_POOL	opt_ktrace.h
LIBICONV
MD_ROOT		opt_md.h
MD_ROOT_SIZE	opt_md.h
NTIMECOUNTER	opt_ntp.h
NSWAPDEV	opt_swap.h
PPS_SYNC	opt_ntp.h
QUOTA
SPX_HACK
SUIDDIR		opt_suiddir.h
SYSVMSG		opt_sysvipc.h
SYSVSEM		opt_sysvipc.h
SYSVSHM		opt_sysvipc.h
SHMALL		opt_sysvipc.h
SHMMAX		opt_sysvipc.h
SHMMAXPGS	opt_sysvipc.h
SHMMIN		opt_sysvipc.h
SHMMNI		opt_sysvipc.h
SHMSEG		opt_sysvipc.h
SEMMAP		opt_sysvipc.h
SEMMNI		opt_sysvipc.h
SEMMNS		opt_sysvipc.h
SEMMNU		opt_sysvipc.h
SEMMSL		opt_sysvipc.h
SEMOPM		opt_sysvipc.h
SEMUME		opt_sysvipc.h
MSGMNB		opt_sysvipc.h
MSGMNI		opt_sysvipc.h
MSGSEG		opt_sysvipc.h
MSGSSZ		opt_sysvipc.h
MSGTQL		opt_sysvipc.h
VFS_AIO

# POSIX kernel options
P1003_1B			opt_posix.h
_KPOSIX_PRIORITY_SCHEDULING	opt_posix.h
_KPOSIX_VERSION			opt_posix.h

# TrustedBSD and POSIX.1e Kernel Options

# Do we want the config file compiled into the kernel?
INCLUDE_CONFIG_FILE	opt_config.h

# Options for static filesystems.  These should only be used at config
# time, since the corresponding lkms cannot work if there are any static
# dependencies.  Unusability is enforced by hiding the defines for the
# options in a never-included header.
CD9660		opt_dontuse.h
CODA		opt_dontuse.h
EXT2FS		opt_dontuse.h
FDESCFS		opt_dontuse.h
LINPROCFS	opt_dontuse.h
MSDOSFS		opt_dontuse.h
NULLFS		opt_dontuse.h
NWFS		opt_dontuse.h
PORTALFS	opt_dontuse.h
PROCFS		opt_dontuse.h
PSEUDOFS	opt_dontuse.h
UMAPFS		opt_dontuse.h
NTFS		opt_dontuse.h
HPFS		opt_dontuse.h
UNIONFS		opt_dontuse.h
UDF		opt_dontuse.h

# Broken - ffs_snapshot() dependency from ufs_lookup() :-(
FFS		opt_ffs_broken_fixme.h

# These static filesystems has one slightly bogus static dependency in
# sys/i386/i386/autoconf.c.  If any of these filesystems are
# statically compiled into the kernel, code for mounting them as root
# filesystems will be enabled - but look below.
NFSCLIENT	opt_nfs.h
NFSSERVER	opt_nfs.h

# If you are following the conditions in the copyright,
# you can enable soft-updates which will speed up a lot of thigs
# and make the system safer from crashes at the same time.
# otherwise a STUB module will be compiled in.
SOFTUPDATES	opt_ffs.h

# Enabling this option turns on support for Access Control Lists in UFS,
# which can be used to support high security configurations.  Depends on
# UFS_EXTATTR.
UFS_ACL		opt_ufs.h

# Enabling this option turns on support for extended attributes in UFS-based
# filesystems, which can be used to support high security configurations
# as well as new filesystem features.
UFS_EXTATTR	opt_ufs.h
UFS_EXTATTR_AUTOSTART	opt_ufs.h

# Enable fast hash lookups for large directories on UFS-based filesystems.
UFS_DIRHASH	opt_ufs.h

# The above static dependencies are planned removed, with a
# <filesystem>_ROOT option to control if it usable as root.  This list
# allows these options to be present in config files already (though
# they won't make any difference yet).
NFS_ROOT	opt_nfsroot.h

# Options used only in subr_param.c.
HZ		opt_param.h
MAXFILES	opt_param.h
NBUF		opt_param.h
NMBCLUSTERS	opt_param.h
NSFBUFS		opt_param.h
VM_BCACHE_SIZE_MAX	opt_param.h
VM_SWZONE_SIZE_MAX	opt_param.h
MAXUSERS
DFLDSIZ		opt_param.h
MAXDSIZ		opt_param.h
MAXSSIZ		opt_param.h

# Generic SCSI options.
CAM_MAX_HIGHPOWER	opt_cam.h
CAMDEBUG		opt_cam.h
CAM_DEBUG_DELAY		opt_cam.h
CAM_DEBUG_BUS		opt_cam.h
CAM_DEBUG_TARGET	opt_cam.h
CAM_DEBUG_LUN		opt_cam.h
CAM_DEBUG_FLAGS		opt_cam.h
CAM_NEW_TRAN_CODE	opt_cam.h
SCSI_DELAY		opt_scsi.h
SCSI_NO_SENSE_STRINGS	opt_scsi.h
SCSI_NO_OP_STRINGS	opt_scsi.h



# Options used only in cam/scsi/scsi_cd.c
CHANGER_MIN_BUSY_SECONDS	opt_cd.h
CHANGER_MAX_BUSY_SECONDS	opt_cd.h

# Options used only in cam/scsi/scsi_sa.c.
SA_IO_TIMEOUT		opt_sa.h
SA_SPACE_TIMEOUT	opt_sa.h
SA_REWIND_TIMEOUT	opt_sa.h
SA_ERASE_TIMEOUT	opt_sa.h
SA_1FM_AT_EOD		opt_sa.h

# Options used only in cam/scsi/scsi_pt.c
SCSI_PT_DEFAULT_TIMEOUT	opt_pt.h

# Options used only in cam/scsi/scsi_ses.c
SES_ENABLE_PASSTHROUGH	opt_ses.h

# Options used in dev/sym/ (Symbios SCSI driver).
SYM_SETUP_LP_PROBE_MAP	opt_sym.h	#-Low Priority Probe Map (bits)
					# Allows the ncr to take precedence
					# 1 (1<<0) -> 810a, 860
					# 2 (1<<1) -> 825a, 875, 885, 895
					# 4 (1<<2) -> 895a, 896, 1510d
SYM_SETUP_SCSI_DIFF	opt_sym.h	#-HVD support for 825a, 875, 885
					# disabled:0 (default), enabled:1
SYM_SETUP_PCI_PARITY	opt_sym.h	#-PCI parity checking
					# disabled:0, enabled:1 (default)
SYM_SETUP_MAX_LUN	opt_sym.h	#-Number of LUNs supported
					# default:8, range:[1..64]

# Options used only in pci/ncr.c
SCSI_NCR_DEBUG		opt_ncr.h
SCSI_NCR_MAX_SYNC	opt_ncr.h
SCSI_NCR_MAX_WIDE	opt_ncr.h
SCSI_NCR_MYADDR		opt_ncr.h

# Options used only in dev/isp/*
ISP_TARGET_MODE		opt_isp.h
ISP_FW_CRASH_DUMP	opt_isp.h

# Options used in the 'ata' ATA/ATAPI driver
ACD_DEBUG		opt_ata.h
AST_DEBUG		opt_ata.h
ATAPI_DEBUG		opt_ata.h
ATA_DEBUG		opt_ata.h
ATA_STATIC_ID		opt_ata.h
DEV_ATADISK		opt_ata.h
DEV_ATAPICD		opt_ata.h
DEV_ATAPIST		opt_ata.h
DEV_ATAPIFD		opt_ata.h

# Net stuff.
ACCEPT_FILTER_DATA
ACCEPT_FILTER_HTTP
BOOTP			opt_bootp.h
BOOTP_COMPAT		opt_bootp.h
BOOTP_NFSROOT		opt_bootp.h
BOOTP_NFSV3		opt_bootp.h
BOOTP_WIRED_TO		opt_bootp.h
BRIDGE			opt_bdg.h
ETHER_II		opt_ef.h
ETHER_8023		opt_ef.h
ETHER_8022		opt_ef.h
ETHER_SNAP		opt_ef.h
MROUTING		opt_mrouting.h
INET			opt_inet.h
INET6			opt_inet6.h
IPSEC			opt_ipsec.h
IPSEC_ESP		opt_ipsec.h
IPSEC_DEBUG		opt_ipsec.h
IPDIVERT
DUMMYNET		opt_ipdn.h
IPFILTER		opt_ipfilter.h
IPFILTER_LOG		opt_ipfilter.h
IPFILTER_DEFAULT_BLOCK	opt_ipfilter.h
PFIL_HOOKS		opt_pfil_hooks.h
IPFIREWALL		opt_ipfw.h
IPFIREWALL_VERBOSE	opt_ipfw.h
IPFIREWALL_VERBOSE_LIMIT	opt_ipfw.h
IPFIREWALL_DEFAULT_TO_ACCEPT	opt_ipfw.h
IPFIREWALL_FORWARD		opt_ipfw.h
IPV6FIREWALL		opt_ip6fw.h
IPV6FIREWALL_VERBOSE	opt_ip6fw.h
IPV6FIREWALL_VERBOSE_LIMIT	opt_ip6fw.h
IPV6FIREWALL_DEFAULT_TO_ACCEPT	opt_ip6fw.h
IPSTEALTH
IPX			opt_ipx.h
IPXIP			opt_ipx.h
IPTUNNEL		opt_ipx.h
LIBMCHAIN
NCP			opt_ncp.h
NETATALK		opt_atalk.h
PPP_BSDCOMP		opt_ppp.h
PPP_DEFLATE		opt_ppp.h
PPP_FILTER		opt_ppp.h
RANDOM_IP_ID
SLIP_IFF_OPTS		opt_slip.h
TCPDEBUG
TCP_DROP_SYNFIN		opt_tcp_input.h
XBONEHACK

# Netgraph(4). Use option NETGRAPH to enable the base netgraph code.
# Each netgraph node type can be either be compiled into the kernel
# or loaded dynamically. To get the former, include the corresponding
# option below. Each type has its own man page, e.g. ng_async(4).
NETGRAPH
NETGRAPH_ASYNC		opt_netgraph.h
NETGRAPH_BPF		opt_netgraph.h
NETGRAPH_BRIDGE		opt_netgraph.h
NETGRAPH_CISCO		opt_netgraph.h
NETGRAPH_ECHO		opt_netgraph.h
NETGRAPH_ETHER		opt_netgraph.h
NETGRAPH_FRAME_RELAY	opt_netgraph.h
NETGRAPH_GIF		opt_netgraph.h
NETGRAPH_GIF_DEMUX	opt_netgraph.h
NETGRAPH_HOLE		opt_netgraph.h
NETGRAPH_IFACE		opt_netgraph.h
NETGRAPH_IP_INPUT	opt_netgraph.h
NETGRAPH_KSOCKET	opt_netgraph.h
NETGRAPH_LMI		opt_netgraph.h
# MPPC compression requires proprietary files (not included)
NETGRAPH_MPPC_COMPRESSION	opt_netgraph.h
NETGRAPH_MPPC_ENCRYPTION	opt_netgraph.h
NETGRAPH_ONE2MANY	opt_netgraph.h
NETGRAPH_PPP		opt_netgraph.h
NETGRAPH_PPPOE		opt_netgraph.h
NETGRAPH_PPTPGRE	opt_netgraph.h
NETGRAPH_RFC1490	opt_netgraph.h
NETGRAPH_SOCKET		opt_netgraph.h
NETGRAPH_SPLIT		opt_netgraph.h
NETGRAPH_TEE		opt_netgraph.h
NETGRAPH_TTY		opt_netgraph.h
NETGRAPH_UI		opt_netgraph.h
NETGRAPH_VJC		opt_netgraph.h

# DRM options
DRM_LINUX		opt_drm.h
DRM_DEBUG		opt_drm.h


ZERO_COPY_SOCKETS	opt_zero.h
TI_PRIVATE_JUMBOS	opt_ti.h
TI_JUMBO_HDRSPLIT	opt_ti.h

# ATM (HARP version)
ATM_CORE		opt_atm.h
ATM_IP			opt_atm.h
ATM_SIGPVC		opt_atm.h
ATM_SPANS		opt_atm.h
ATM_UNI			opt_atm.h

# XXX Conflict: # of devices vs network protocol (Native ATM).
# This makes "atm.h" unusable.
NATM			opt_natm.h

DPT_ALLOW_MEMIO		opt_dpt.h	# Allow PCI devices to use memory
					# mapped I/O
# DPT driver debug flags
DPT_MEASURE_PERFORMANCE	opt_dpt.h
DPT_HANDLE_TIMEOUTS	opt_dpt.h
DPT_TIMEOUT_FACTOR	opt_dpt.h
DPT_LOST_IRQ		opt_dpt.h
DPT_RESET_HBA		opt_dpt.h

# Adaptec ASR and DPT V/VI controller options
ASR_MEASURE_PERFORMANCE	opt_asr.h

# Misc debug flags.  Most of these should probably be replaced with
# 'DEBUG', and then let people recompile just the interesting modules
# with 'make CC="cc -DDEBUG"'.
CLUSTERDEBUG		opt_debug_cluster.h
DEBUG_1284		opt_ppb_1284.h
VP0_DEBUG		opt_vpo.h
LPT_DEBUG		opt_lpt.h
PLIP_DEBUG		opt_plip.h
LOCKF_DEBUG		opt_debug_lockf.h
NPX_DEBUG		opt_debug_npx.h
NETATALKDEBUG		opt_atalk.h
SI_DEBUG		opt_debug_si.h

# Fb options
FB_DEBUG		opt_fb.h
FB_INSTALL_CDEV		opt_fb.h

# ppbus related options
PERIPH_1284		opt_ppb_1284.h
DONTPROBE_1284		opt_ppb_1284.h

# smbus related options
ENABLE_ALART		opt_intpm.h

# These cause changes all over the kernel
BLKDEV_IOSIZE		opt_global.h
DEBUG			opt_global.h
DEBUG_LOCKS		opt_global.h
DEBUG_VFS_LOCKS		opt_global.h
LOOKUP_SHARED		opt_global.h
DIAGNOSTIC		opt_global.h
ENABLE_VFS_IOOPT	opt_global.h
INVARIANT_SUPPORT	opt_global.h
INVARIANTS		opt_global.h
MCLSHIFT		opt_global.h
MSIZE			opt_global.h
REGRESSION		opt_global.h
RESTARTABLE_PANICS	opt_global.h
VFS_BIO_DEBUG		opt_global.h

# These are VM related options
VM_KMEM_SIZE		opt_vm.h
VM_KMEM_SIZE_SCALE	opt_vm.h
VM_KMEM_SIZE_MAX	opt_vm.h
NO_SWAPPING		opt_vm.h
MALLOC_PROFILE		opt_vm.h
PQ_NOOPT		opt_vmpage.h
PQ_NORMALCACHE		opt_vmpage.h
PQ_MEDIUMCACHE		opt_vmpage.h
PQ_LARGECACHE		opt_vmpage.h
PQ_HUGECACHE		opt_vmpage.h
PQ_CACHESIZE		opt_vmpage.h

# Standard SMP options
SMP			opt_global.h

# Size of the kernel message buffer
MSGBUF_SIZE		opt_msgbuf.h

# PCI related options
PCI_ENABLE_IO_MODES	opt_pci.h
PCI_ALLOW_UNSUPPORTED_IO_RANGE	opt_pci.h

# NFS options
NFS_MINATTRTIMO		opt_nfs.h
NFS_MAXATTRTIMO		opt_nfs.h
NFS_MINDIRATTRTIMO	opt_nfs.h
NFS_MAXDIRATTRTIMO	opt_nfs.h
NFS_GATHERDELAY		opt_nfs.h
NFS_WDELAYHASHSIZ	opt_nfs.h
NFS_DEBUG		opt_nfs.h

# For the Bt848/Bt848A/Bt849/Bt878/Bt879 driver
OVERRIDE_CARD			opt_bktr.h
OVERRIDE_TUNER			opt_bktr.h
OVERRIDE_DBX			opt_bktr.h
OVERRIDE_MSP			opt_bktr.h
BROOKTREE_SYSTEM_DEFAULT	opt_bktr.h
BROOKTREE_ALLOC_PAGES		opt_bktr.h
BKTR_OVERRIDE_CARD		opt_bktr.h
BKTR_OVERRIDE_TUNER		opt_bktr.h
BKTR_OVERRIDE_DBX		opt_bktr.h
BKTR_OVERRIDE_MSP		opt_bktr.h
BKTR_SYSTEM_DEFAULT		opt_bktr.h
BKTR_ALLOC_PAGES		opt_bktr.h
BKTR_USE_PLL			opt_bktr.h
BKTR_GPIO_ACCESS		opt_bktr.h
BKTR_NO_MSP_RESET		opt_bktr.h
BKTR_430_FX_MODE		opt_bktr.h
BKTR_SIS_VIA_MODE		opt_bktr.h
BKTR_USE_FREEBSD_SMBUS		opt_bktr.h

# meteor opt_meteor.h
METEOR_ALLOC_PAGES	opt_meteor.h
METEOR_TEST_VIDEO	opt_meteor.h
METEOR_SYSTEM_DEFAULT	opt_meteor.h
METEOR_DEALLOC_PAGES	opt_meteor.h
METEOR_DEALLOC_ABOVE	opt_meteor.h

# Various mi ISA bus flags
COM_ESP			opt_sio.h
COM_MULTIPORT		opt_sio.h
BREAK_TO_DEBUGGER	opt_comconsole.h
ALT_BREAK_TO_DEBUGGER	opt_comconsole.h
DEV_ISA			opt_isa.h

# Include tweaks for running under the SimOS machine simulator.
SIMOS			opt_simos.h

# options for bus/device framework
BUS_DEBUG		opt_bus.h

# options for USB support
UHCI_DEBUG		opt_usb.h
OHCI_DEBUG		opt_usb.h
USB_DEBUG		opt_usb.h
UGEN_DEBUG		opt_usb.h
UHID_DEBUG		opt_usb.h
UHUB_DEBUG		opt_usb.h
UKBD_DEBUG		opt_usb.h
ULPT_DEBUG		opt_usb.h
UMASS_DEBUG		opt_usb.h
UMS_DEBUG		opt_usb.h
URIO_DEBUG		opt_usb.h
UKBD_DFLT_KEYMAP	opt_ukbd.h

# Vinum options
VINUMDEBUG		opt_vinum.h

# Embedded system options
INIT_PATH		opt_init_path.h

ROOTDEVNAME		opt_rootdevname.h

FDC_DEBUG		opt_fdc.h
PCFCLOCK_VERBOSE	opt_pcfclock.h
PCFCLOCK_MAX_RETRIES	opt_pcfclock.h
TDFX_LINUX opt_tdfx.h

KTR			opt_global.h
KTR_MASK		opt_ktr.h
KTR_CPUMASK		opt_ktr.h
KTR_COMPILE		opt_global.h
KTR_ENTRIES		opt_global.h
KTR_VERBOSE		opt_ktr.h
MUTEX_DEBUG		opt_global.h
WITNESS			opt_global.h
WITNESS_DDB		opt_witness.h
WITNESS_SKIPSPIN	opt_witness.h

# options for ACPI support
ACPI_DEBUG		opt_acpi.h
ACPI_NO_SEMAPHORES	opt_acpi.h
ACPI_MAX_THREADS	opt_acpi.h

# options for DEVFS, see sys/fs/devfs/devfs.h
NDEVFSINO		opt_devfs.h
NDEVFSOVERFLOW		opt_devfs.h

# various 'device presence' options.
DEV_MCA			opt_mca.h
DEV_BPF			opt_bpf.h

# ed driver
ED_NO_MIIBUS		opt_ed.h

# Polling device handling
DEVICE_POLLING		opt_global.h

# Mutex profiling
MUTEX_PROFILING		opt_global.h