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| author | Huang Ying <ying.huang@intel.com> | 2009-10-19 06:53:06 +0400 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2009-10-19 06:53:06 +0400 |
| commit | 0e1227d356e9b2fe0500d6cc7084f752040a1e0e (patch) | |
| tree | 6f059b8e3c31539942ad244e7aadabcb54e8d904 /crypto/Kconfig | |
| parent | 4c6ab3ee4cdb86cbd4e9400dd22fad7701cbe795 (diff) | |
| download | linux-0e1227d356e9b2fe0500d6cc7084f752040a1e0e.tar.xz | |
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/Kconfig | 8 |
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 |