malhuda/msm-4.14
1
0
Fork 0
mirror of https://github.com/rd-stuffs/msm-4.14.git synced 2025-02-20 11:45:48 +08:00
Code Issues Actions Packages Projects Releases Wiki Activity
msm-4.14/Documentation
History
Eric Dumazet 0a14842f5a net: filter: Just In Time compiler for x86-64 
In order to speedup packet filtering, here is an implementation of a
JIT compiler for x86_64

It is disabled by default, and must be enabled by the admin.

echo 1 >/proc/sys/net/core/bpf_jit_enable

It uses module_alloc() and module_free() to get memory in the 2GB text
kernel range since we call helpers functions from the generated code.

EAX : BPF A accumulator
EBX : BPF X accumulator
RDI : pointer to skb   (first argument given to JIT function)
RBP : frame pointer (even if CONFIG_FRAME_POINTER=n)
r9d : skb->len - skb->data_len (headlen)
r8  : skb->data

To get a trace of generated code, use :

echo 2 >/proc/sys/net/core/bpf_jit_enable

Example of generated code :

# tcpdump -p -n -s 0 -i eth1 host 192.168.20.0/24

flen=18 proglen=147 pass=3 image=ffffffffa00b5000
JIT code: ffffffffa00b5000: 55 48 89 e5 48 83 ec 60 48 89 5d f8 44 8b 4f 60
JIT code: ffffffffa00b5010: 44 2b 4f 64 4c 8b 87 b8 00 00 00 be 0c 00 00 00
JIT code: ffffffffa00b5020: e8 24 7b f7 e0 3d 00 08 00 00 75 28 be 1a 00 00
JIT code: ffffffffa00b5030: 00 e8 fe 7a f7 e0 24 00 3d 00 14 a8 c0 74 49 be
JIT code: ffffffffa00b5040: 1e 00 00 00 e8 eb 7a f7 e0 24 00 3d 00 14 a8 c0
JIT code: ffffffffa00b5050: 74 36 eb 3b 3d 06 08 00 00 74 07 3d 35 80 00 00
JIT code: ffffffffa00b5060: 75 2d be 1c 00 00 00 e8 c8 7a f7 e0 24 00 3d 00
JIT code: ffffffffa00b5070: 14 a8 c0 74 13 be 26 00 00 00 e8 b5 7a f7 e0 24
JIT code: ffffffffa00b5080: 00 3d 00 14 a8 c0 75 07 b8 ff ff 00 00 eb 02 31
JIT code: ffffffffa00b5090: c0 c9 c3

BPF program is 144 bytes long, so native program is almost same size ;)

(000) ldh      [12]
(001) jeq      #0x800           jt 2    jf 8
(002) ld       [26]
(003) and      #0xffffff00
(004) jeq      #0xc0a81400      jt 16   jf 5
(005) ld       [30]
(006) and      #0xffffff00
(007) jeq      #0xc0a81400      jt 16   jf 17
(008) jeq      #0x806           jt 10   jf 9
(009) jeq      #0x8035          jt 10   jf 17
(010) ld       [28]
(011) and      #0xffffff00
(012) jeq      #0xc0a81400      jt 16   jf 13
(013) ld       [38]
(014) and      #0xffffff00
(015) jeq      #0xc0a81400      jt 16   jf 17
(016) ret      #65535
(017) ret      #0

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
Cc: Ben Hutchings <bhutchings@solarflare.com>
Cc: Hagen Paul Pfeifer <hagen@jauu.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-04-27 23:05:08 -07:00
..
ABI
Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6
2011-04-07 11:14:49 -07:00
accounting
taskstats: pad taskstats netlink response for aligment issues on ia64
2010-12-22 19:43:34 -08:00
acpi
ACPI, APEI, Add PCIe AER error information printing support
2011-03-21 22:59:08 -04:00
aoe
Documentation: update broken web addresses.
2010-08-04 15:21:40 +02:00
arm
Fix common misspellings
2011-03-31 11:26:23 -03:00
auxdisplay
includecheck fix: Documentation, cfag12864b-example.c
2009-09-24 07:20:57 -07:00
blackfin
Blackfin: document SPI CS limitations with CPHA=0
2010-08-06 12:55:52 -04:00
block
Fix common misspellings
2011-03-31 11:26:23 -03:00
blockdev
Documentation: update broken web addresses.
2010-08-04 15:21:40 +02:00
cdrom
Documentation: update broken web addresses.
2010-08-04 15:21:40 +02:00
cgroups
Documentation: update cgroups info user groups names
2011-04-04 17:51:47 -07:00
connector
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
console
doc: fix console doc typo
2010-02-24 13:51:32 +01:00
cpu-freq
[CPUFREQ] Add documentation for sampling_down_factor
2011-03-16 17:54:31 -04:00
cpuidle
…
cris
…
crypto
…
development-process
docs: update the development process document
2011-03-25 14:30:31 -06:00
device-mapper
Fix common misspellings
2011-03-31 11:26:23 -03:00
devicetree
Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6
2011-04-07 11:14:49 -07:00
DocBook
Fix common misspellings
2011-03-31 11:26:23 -03:00
driver-model
driver core: prune docs about device_interface
2010-11-10 16:57:11 -08:00
dvb
Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6
2011-04-07 11:14:49 -07:00
early-userspace
…
fault-injection
lkdtm: add debugfs access and loosen KPROBE ties
2010-03-06 11:26:32 -08:00
fb
Fix common misspellings
2011-03-31 11:26:23 -03:00
filesystems
Fix common misspellings
2011-03-31 11:26:23 -03:00
firmware_class
firmware: Update hotplug script
2010-08-05 13:53:34 -07:00
frv
…
hwmon
Fix common misspellings
2011-03-31 11:26:23 -03:00
i2c
Fix common misspellings
2011-03-31 11:26:23 -03:00
i2o
Fix common misspellings
2011-03-31 11:26:23 -03:00
ia64
Fix common misspellings
2011-03-31 11:26:23 -03:00
ide
…
infiniband
Documentation: update broken web addresses.
2010-08-04 15:21:40 +02:00
input
Fix common misspellings
2011-03-31 11:26:23 -03:00
ioctl
Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6
2011-03-24 09:50:13 -07:00
isdn
Fix common misspellings
2011-03-31 11:26:23 -03:00
ja_JP
Documentation: update broken web addresses.
2010-08-04 15:21:40 +02:00
kbuild
Fix common misspellings
2011-03-31 11:26:23 -03:00
kdump
kdump: update kexec-tools URL and Vivek's email
2010-11-25 14:36:38 +01:00
ko_KR
Docs/Kconfig: Update: osdl.org -> linuxfoundation.org
2010-11-15 23:50:13 +01:00
kvm
Fix common misspellings
2011-03-31 11:26:23 -03:00
laptops
Documentation: fix minor typos/spelling
2011-04-04 17:51:47 -07:00
leds
Documentation: consolidate leds files to leds/ subdir
2011-04-04 17:51:47 -07:00
lguest
lguest: document --rng in example Launcher
2011-01-20 21:37:29 +10:30
m68k
…
make
kbuild: introduce HDR_ARCH_LIST for headers_install_all
2010-12-14 22:16:19 +01:00
mips
Fix common misspellings
2011-03-31 11:26:23 -03:00
misc-devices
Fix common misspellings
2011-03-31 11:26:23 -03:00
mmc
mmc: add erase, secure erase, trim and secure trim operations
2010-08-12 08:43:30 -07:00
mn10300
…
mtd
Documentation: update broken web addresses.
2010-08-04 15:21:40 +02:00
namespaces
…
netlabel
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
networking
igb: Add anti-spoofing feature documentation
2011-04-13 19:15:50 -07:00
nfc
NFC: Driver for NXP Semiconductors PN544 NFC chip.
2011-01-13 08:03:19 -08:00
parisc
…
PCI
Fix common misspellings
2011-03-31 11:26:23 -03:00
pcmcia
pcmcia: use autoconfiguration feature for ioports and iomem
2010-09-29 17:20:24 +02:00
power
Fix common misspellings
2011-03-31 11:26:23 -03:00
powerpc
Fix common misspellings
2011-03-31 11:26:23 -03:00
pps
pps: add parallel port PPS signal generator
2011-01-13 08:03:21 -08:00
prctl
…
rapidio
rapidio: add RapidIO documentation
2011-03-23 19:46:41 -07:00
RCU
rcu: add documentation saying which RCU flavor to choose
2011-03-04 08:05:25 -08:00
s390
Documentation: fix minor typos/spelling
2011-04-04 17:51:47 -07:00
scheduler
sched, doc: Beef up load balancing description
2011-03-31 13:00:35 +02:00
scsi
Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6
2011-04-07 11:14:49 -07:00
serial
Fix common misspellings
2011-03-31 11:26:23 -03:00
sh
sh: clkfwk: Kill off unused clk_set_rate_ex().
2010-11-15 18:25:12 +09:00
sound
Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6
2011-04-07 11:14:49 -07:00
sparc
…
spi
Fix common misspellings
2011-03-31 11:26:23 -03:00
sysctl
net: filter: Just In Time compiler for x86-64
2011-04-27 23:05:08 -07:00
target
[SCSI] tcm_mod_builder.py: Fix generated *_drop_nodeacl() handler
2011-03-23 11:36:45 -05:00
telephony
Fix common misspellings
2011-03-31 11:26:23 -03:00
thermal
thermal: Add event notification to thermal framework
2011-01-12 00:08:35 -05:00
timers
tree-wide: fix comment/printk typos
2010-11-01 15:38:34 -04:00
trace
Fix common misspellings
2011-03-31 11:26:23 -03:00
uml
Documentation: update broken web addresses.
2010-08-04 15:21:40 +02:00
usb
USB: usbmon: fix-up docs and text API for sparse ISO
2011-02-04 11:46:57 -08:00
video4linux
Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6
2011-04-07 11:14:49 -07:00
vm
Fix common misspellings
2011-03-31 11:26:23 -03:00
w1
Fix common misspellings
2011-03-31 11:26:23 -03:00
watchdog
Fix common misspellings
2011-03-31 11:26:23 -03:00
wimax
…
x86
move x86 specific oops=panic to generic code
2011-03-22 17:44:11 -07:00
zh_CN
Fix spelling mistakes in Documentation/zh_CN/SubmittingPatches
2011-02-28 19:30:48 -08:00
.gitignore
add random binaries to .gitignore
2010-04-08 11:34:34 +02:00
00-INDEX
Documentation: consolidate leds files to leds/ subdir
2011-04-04 17:51:47 -07:00
apparmor.txt
AppArmor: update Maintainer and Documentation
2010-08-02 15:35:15 +10:00
applying-patches.txt
…
atomic_ops.txt
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
bad_memory.txt
…
basic_profiling.txt
…
binfmt_misc.txt
Documentation: update broken web addresses.
2010-08-04 15:21:40 +02:00
braille-console.txt
…
bt8xxgpio.txt
…
btmrvl.txt
…
BUG-HUNTING
…
bus-virt-phys-mapping.txt
documentation: fix almost duplicate filenames (IO/io-mapping.txt)
2010-07-20 17:49:30 +00:00
cachetlb.txt
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
Changes
Documentation/Changes: minor corrections
2011-03-22 17:44:17 -07:00
circular-buffers.txt
Document Linux's circular buffering capabilities
2010-03-24 16:31:22 -07:00
coccinelle.txt
scripts/coccinelle: update for compatability with Coccinelle 0.2.4
2010-12-03 12:27:01 +01:00
CodingStyle
Documentation/CodingStyle: flesh out if-else examples
2011-03-22 17:44:16 -07:00
cpu-hotplug.txt
Fix common misspellings
2011-03-31 11:26:23 -03:00
cpu-load.txt
…
cputopology.txt
topology/sysfs: Provide book id and siblings attributes
2010-09-09 20:41:25 +02:00
credentials.txt
CRED: Fix __task_cred()'s lockdep check and banner comment
2010-07-29 15:16:18 -07:00
dcdbas.txt
…
debugging-modules.txt
…
debugging-via-ohci1394.txt
ieee1394: update URLs in debugging-via-ohci1394.txt
2009-10-03 09:28:11 +02:00
dell_rbu.txt
Fix common misspellings
2011-03-31 11:26:23 -03:00
devices.txt
Merge branch 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6
2010-10-28 09:35:11 -07:00
DMA-API-HOWTO.txt
Documentation: DMA-API-HOWTO.txt: rename ARCH_KMALLOC_MINALIGN to ARCH_DMA_MINALIGN
2010-08-14 11:56:46 -07:00
DMA-API.txt
dma-mapping: remove dma_is_consistent API
2010-08-11 08:59:21 -07:00
DMA-attributes.txt
…
DMA-ISA-LPC.txt
…
dmaengine.txt
…
dontdiff
Documentation/dontdiff: add further autogenerated files to ignore list
2011-01-06 09:59:37 -08:00
dynamic-debug-howto.txt
Merge branch 'docs-next' of git://git.lwn.net/linux-2.6
2011-03-27 19:46:59 -07:00
edac.txt
Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6
2011-04-07 11:14:49 -07:00
eisa.txt
Fix common misspellings
2011-03-31 11:26:23 -03:00
email-clients.txt
Documentation/email-clients.txt: update Thunderbird docs with wordwrap plugin
2011-01-13 08:03:15 -08:00
feature-removal-schedule.txt
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next-2.6 into for-davem
2011-04-12 16:18:44 -04:00
flexible-arrays.txt
Update flex_arrays.txt
2009-10-15 07:25:20 -06:00
futex-requeue-pi.txt
…
gcov.txt
trivial: fix typo in CONFIG_DEBUG_FS in gcov doc
2009-09-21 15:14:56 +02:00
gpio.txt
Revert "gpiolib: annotate gpio-intialization with __must_check"
2011-01-13 17:26:46 -08:00
highuid.txt
…
HOWTO
Documentation: update broken web addresses.
2010-08-04 15:21:40 +02:00
hw_random.txt
…
hwspinlock.txt
drivers: hwspinlock: add framework
2011-02-17 09:52:03 -08:00
init.txt
init/main.c: improve usability in case of init binary failure
2010-03-06 11:26:29 -08:00
initrd.txt
…
intel_txt.txt
Documentation: update broken web addresses.
2010-08-04 15:21:40 +02:00
Intel-IOMMU.txt
intel-iommu: Kill DMAR_BROKEN_GFX_WA option.
2009-09-19 09:37:23 -07:00
io_ordering.txt
…
io-mapping.txt
…
iostats.txt
Documentation/iostats.txt: bit-size reference etc.
2011-03-23 20:44:18 +01:00
IPMI.txt
IPMI: Add the document description of ipmi_get_smi_info
2010-12-14 00:22:00 -05:00
IRQ-affinity.txt
…
IRQ.txt
…
irqflags-tracing.txt
Fix common misspellings
2011-03-31 11:26:23 -03:00
isapnp.txt
…
java.txt
…
kernel-doc-nano-HOWTO.txt
docbook: warn on unused doc entries
2010-09-11 16:49:21 -07:00
kernel-docs.txt
Documentation: update kernel-docs.txt
2011-01-06 09:59:38 -08:00
kernel-parameters.txt
Merge branch 'for-linus2' of git://git.profusion.mobi/users/lucas/linux-2.6
2011-04-07 11:14:49 -07:00
keys-request-key.txt
KEYS: Add a new keyctl op to reject a key with a specified error code
2011-03-08 11:17:18 +11:00
keys-trusted-encrypted.txt
keys: add new trusted key-type
2010-11-29 08:55:25 +11:00
keys.txt
KEYS: Add an iovec version of KEYCTL_INSTANTIATE
2011-03-08 11:17:22 +11:00
kmemcheck.txt
…
kmemleak.txt
Documentation: update kmemleak arch. info
2011-04-04 17:51:46 -07:00
kobject.txt
kobject: documentation: Update to refer to kset-example.c.
2010-03-19 07:12:20 -07:00
kprobes.txt
tree-wide: fix comment/printk typos
2010-11-01 15:38:34 -04:00
kref.txt
kref: Fix typo in kref documentation
2011-03-07 13:20:05 -08:00
ldm.txt
Documentation: update broken web addresses.
2010-08-04 15:21:40 +02:00
local_ops.txt
…
lockdep-design.txt
…
lockstat.txt
lockstat: Add usage info to Documentation/lockstat.txt
2009-12-06 13:20:02 +01:00
logo.gif
…
logo.txt
…
magic-number.txt
take coda-private headers out of include/linux
2011-01-12 20:02:48 -05:00
Makefile
[media] Remove the old V4L1 v4lgrab.c file
2010-12-29 08:17:12 -02:00
ManagementStyle
…
mca.txt
…
md.txt
Documentation: update broken web addresses.
2010-08-04 15:21:40 +02:00
media-framework.txt
Fix common misspellings
2011-03-31 11:26:23 -03:00
memory-barriers.txt
smp: Document transitivity for memory barriers.
2011-03-04 08:05:49 -08:00
memory-hotplug.txt
memory hotplug: Allow memory blocks to span multiple memory sections
2011-02-03 16:08:57 -08:00
memory.txt
Documentation/memory.txt: remove some very outdated recommendations
2009-09-22 07:17:26 -07:00
mono.txt
…
mutex-design.txt
mutex: Fix annotations to include it in kernel-locking docbook
2010-09-03 08:19:51 +02:00
nmi_watchdog.txt
…
nommu-mmap.txt
nommu: fix malloc performance by adding uninitialized flag
2009-12-15 08:53:24 -08:00
numastat.txt
mm: fix NUMA accounting in numastat.txt
2009-09-22 07:17:39 -07:00
oops-tracing.txt
panic: Add taint flag TAINT_FIRMWARE_WORKAROUND ('I')
2010-05-19 08:37:43 +01:00
padata.txt
Documentation/padata.txt: fix typos etc.
2010-08-11 08:59:18 -07:00
parport-lowlevel.txt
…
parport.txt
…
pi-futex.txt
…
pnp.txt
doc: capitalization and other minor fixes in pnp doc
2010-02-05 12:22:44 +01:00
preempt-locking.txt
…
printk-formats.txt
…
prio_tree.txt
…
rbtree.txt
Documentation: remove anticipatory scheduler info
2010-11-11 12:09:59 +01:00
rfkill.txt
Document the rfkill sysfs ABI
2010-03-10 17:09:33 -05:00
robust-futex-ABI.txt
…
robust-futexes.txt
…
rt-mutex-design.txt
variable name fix to Documentation/rt-mutex-design.txt
2010-06-05 17:39:09 +02:00
rt-mutex.txt
…
rtc.txt
RTC: Fix up rtc.txt documentation to reflect changes to generic rtc layer
2011-03-09 11:25:10 -08:00
SAK.txt
…
SecurityBugs
Fix common misspellings
2011-03-31 11:26:23 -03:00
SELinux.txt
…
serial-console.txt
…
sgi-ioc4.txt
…
sgi-visws.txt
…
SM501.txt
…
Smack.txt
Documentation/: it's -> its where appropriate
2010-04-23 02:09:52 +02:00
sparse.txt
update email address
2010-07-19 10:56:54 +02:00
spinlocks.txt
locking: Remove deprecated lock initializers
2011-01-27 12:30:38 +01:00
stable_api_nonsense.txt
…
stable_kernel_rules.txt
Documentation: -stable rules: upstream commit ID requirement reworded
2010-04-22 15:24:56 -07:00
SubmitChecklist
Documentation: update SubmitChecklist for O=objdir and kconfig testing
2010-05-24 07:31:20 -07:00
SubmittingDrivers
Fix common misspellings
2011-03-31 11:26:23 -03:00
SubmittingPatches
Fix common misspellings
2011-03-31 11:26:23 -03:00
svga.txt
…
sysfs-rules.txt
Fix typos in comments
2010-03-16 11:47:56 +01:00
sysrq.txt
documentation: update sysrq.txt magic sysrq keys
2010-10-26 17:32:41 -07:00
tomoyo.txt
TOMOYO: Update version to 2.3.0
2010-08-02 15:35:10 +10:00
unaligned-memory-access.txt
…
unicode.txt
…
unshare.txt
…
VGA-softcursor.txt
…
vgaarbiter.txt
vgaarbiter: fix a typo in the vgaarbiter Documentation
2009-12-16 11:28:58 -08:00
video-output.txt
…
volatile-considered-harmful.txt
Documentation/volatile-considered-harmful.txt: correct cpu_relax() documentation
2010-03-24 16:31:20 -07:00
workqueue.txt
workqueue, freezer: unify spelling of 'freeze' + 'able' to 'freezable'
2011-02-16 17:48:59 +01:00
xz.txt
decompressors: add XZ decompressor module
2011-01-13 08:03:24 -08:00
zorro.txt
…