crypto: ghash - Add PCLMULQDQ accelerated implementation

Browse source

PCLMULQDQ is used to accelerate the most time-consuming part of GHASH,
carry-less multiplication. More information about PCLMULQDQ can be
found at:

http://software.intel.com/en-us/articles/carry-less-multiplication-and-its-usage-for-computing-the-gcm-mode/

Because PCLMULQDQ changes XMM state, its usage must be enclosed with
kernel_fpu_begin/end, which can be used only in process context, the
acceleration is implemented as crypto_ahash. That is, request in soft
IRQ context will be defered to the cryptd kernel thread.

Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

...

This commit is contained in:

Huang Ying 2009-10-19 11:53:06 +09:00 • committed by Herbert Xu

parent 4c6ab3ee4c

commit 0e1227d356

7 changed files with 510 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

3

arch/x86/crypto/Makefile

View file

157

arch/x86/crypto/ghash-clmulni-intel_asm.S

View file

333

arch/x86/crypto/ghash-clmulni-intel_glue.c

View file

1

arch/x86/include/asm/cpufeature.h

View file

8

crypto/Kconfig

View file

7

crypto/cryptd.c

View file

1

include/crypto/cryptd.h

View file