crypto: crct10dif - Glue code to cast accelerated CRCT10DIF assembly as a crypto transform

Glue code that plugs the PCLMULQDQ accelerated CRC T10 DIF hash into the
crypto framework.  The config CRYPTO_CRCT10DIF_PCLMUL should be turned
on to enable the feature.  The crc_t10dif crypto library function will
use this faster algorithm when crct10dif_pclmul module is loaded.

Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 11 insertions, 0 deletions

diff --git a/crypto/Kconfig b/crypto/Kconfig
index ceb3611efe44..d1ca6312d798 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -384,6 +384,17 @@ config CRYPTO_CRCT10DIF
           a crypto transform.  This allows for faster crc t10 diff
           transforms to be used if they are available.
 
+config CRYPTO_CRCT10DIF_PCLMUL
+        tristate "CRCT10DIF PCLMULQDQ hardware acceleration"
+        depends on X86 && 64BIT && CRC_T10DIF
+        select CRYPTO_HASH
+        help
+          For x86_64 processors with SSE4.2 and PCLMULQDQ supported,
+          CRC T10 DIF PCLMULQDQ computation can be hardware
+          accelerated PCLMULQDQ instruction. This option will create
+          'crct10dif-plcmul' module, which is faster when computing the
+          crct10dif checksum as compared with the generic table implementation.
+
 config CRYPTO_GHASH
         tristate "GHASH digest algorithm"
         select CRYPTO_GF128MUL