freebsd-dev/sys/arm/conf/DB-78XXX
Jonathan T. Looney bd79708dbf In the TCP stack, the hhook(9) framework provides hooks for kernel modules
to add actions that run when a TCP frame is sent or received on a TCP
session in the ESTABLISHED state. In the base tree, this functionality is
only used for the h_ertt module, which is used by the cc_cdg, cc_chd, cc_hd,
and cc_vegas congestion control modules.

Presently, we incur overhead to check for hooks each time a TCP frame is
sent or received on an ESTABLISHED TCP session.

This change adds a new compile-time option (TCP_HHOOK) to determine whether
to include the hhook(9) framework for TCP. To retain backwards
compatibility, I added the TCP_HHOOK option to every configuration file that
already defined "options INET". (Therefore, this patch introduces no
functional change. In order to see a functional difference, you need to
compile a custom kernel without the TCP_HHOOK option.) This change will
allow users to easily exclude this functionality from their kernel, should
they wish to do so.

Note that any users who use a custom kernel configuration and use one of the
congestion control modules listed above will need to add the TCP_HHOOK
option to their kernel configuration.

Reviewed by:	rrs, lstewart, hiren (previous version), sjg (makefiles only)
Sponsored by:	Netflix
Differential Revision:	https://reviews.freebsd.org/D8185
2016-10-12 02:16:42 +00:00

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#
# Custom kernel for Marvell DB-78xx boards.
#
# $FreeBSD$
#
ident DB-88F78XX
include "std.arm"
include "../mv/discovery/std.db78xxx"
options SOC_MV_DISCOVERY
makeoptions WERROR="-Werror"
options SCHED_4BSD # 4BSD scheduler
options INET # InterNETworking
options INET6 # IPv6 communications protocols
options TCP_HHOOK # hhook(9) framework for TCP
options GEOM_PART_BSD # BSD partition scheme
options GEOM_PART_MBR # MBR partition scheme
options TMPFS # Efficient memory filesystem
options FFS # Berkeley Fast Filesystem
options NANDFS # NAND Filesystem
options NFSCL # Network Filesystem Client
options NFSLOCKD # Network Lock Manager
options NFS_ROOT # NFS usable as /, requires NFSCL
options BOOTP
options BOOTP_NFSROOT
options BOOTP_NFSV3
options BOOTP_WIRED_TO=mge0
#options ROOTDEVNAME=\"ufs:/dev/da0a\"
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 MUTEX_NOINLINE
options RWLOCK_NOINLINE
options NO_FFS_SNAPSHOT
options NO_SWAPPING
device pci
# Pseudo devices
device loop
device md
device random
# Serial ports
device uart
# Networking
device ether
device mge # Marvell Gigabit Ethernet controller
device mii
device mdio
device e1000phy
device bpf
# USB
device usb
device ehci
device umass
device scbus
device pass
device da
# I2C (TWSI)
device iic
device iicbus
device twsi
device ds133x
# SATA
device mvs
# NAND
device nand
# GPIO
device gpio
# Flattened Device Tree
options FDT
options FDT_DTB_STATIC
makeoptions FDT_DTS_FILE=db78100.dts