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authorHuang Ying <ying.huang@intel.com>2009-10-19 11:53:06 +0900
committerHerbert Xu <herbert@gondor.apana.org.au>2009-10-19 11:53:06 +0900
commit0e1227d356e9b2fe0500d6cc7084f752040a1e0e (patch)
tree6f059b8e3c31539942ad244e7aadabcb54e8d904 /crypto/Kconfig
parent4c6ab3ee4cdb86cbd4e9400dd22fad7701cbe795 (diff)
crypto: ghash - Add PCLMULQDQ accelerated implementation
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>
Diffstat (limited to 'crypto/Kconfig')
-rw-r--r--crypto/Kconfig8
1 files changed, 8 insertions, 0 deletions
diff --git a/crypto/Kconfig b/crypto/Kconfig
index 26b5dd0cb564..fd6871102b60 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -440,6 +440,14 @@ config CRYPTO_WP512
See also:
<http://planeta.terra.com.br/informatica/paulobarreto/WhirlpoolPage.html>
+config CRYPTO_GHASH_CLMUL_NI_INTEL
+ tristate "GHASH digest algorithm (CLMUL-NI accelerated)"
+ select CRYPTO_SHASH
+ select CRYPTO_CRYPTD
+ help
+ GHASH is message digest algorithm for GCM (Galois/Counter Mode).
+ The implementation is accelerated by CLMUL-NI of Intel.
+
comment "Ciphers"
config CRYPTO_AES

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