From 0e1227d356e9b2fe0500d6cc7084f752040a1e0e Mon Sep 17 00:00:00 2001 From: Huang Ying Date: Mon, 19 Oct 2009 11:53:06 +0900 Subject: 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 Signed-off-by: Herbert Xu --- crypto/Kconfig | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'crypto/Kconfig') 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: +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 -- cgit v1.2.3