crypto: sha512-mb - Enable SHA512 multibuffer support
authorMegha Dey <megha.dey@linux.intel.com>
Mon, 27 Jun 2016 17:20:05 +0000 (10:20 -0700)
committerHerbert Xu <herbert@gondor.apana.org.au>
Tue, 28 Jun 2016 08:06:37 +0000 (16:06 +0800)
Add the config CRYPTO_SHA512_MB which will enable the computation
using the SHA512 multi-buffer algorithm.

Signed-off-by: Megha Dey <megha.dey@linux.intel.com>
Reviewed-by: Fenghua Yu <fenghua.yu@intel.com>
Reviewed-by: Tim Chen <tim.c.chen@linux.intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
crypto/Kconfig

index d8cc0f0852786ad6e0cfeb64a2c1b9f77a28513d..62fcbb9237533cba9d402dfea74e83dfef4f2708 100644 (file)
@@ -720,6 +720,22 @@ config CRYPTO_SHA256_MB
          lanes remain unfilled, a flush operation will be initiated to
          process the crypto jobs, adding a slight latency.
 
+config CRYPTO_SHA512_MB
+        tristate "SHA512 digest algorithm (x86_64 Multi-Buffer, Experimental)"
+        depends on X86 && 64BIT
+        select CRYPTO_SHA512
+        select CRYPTO_HASH
+        select CRYPTO_MCRYPTD
+        help
+          SHA-512 secure hash standard (FIPS 180-1/DFIPS 180-2) implemented
+          using multi-buffer technique.  This algorithm computes on
+          multiple data lanes concurrently with SIMD instructions for
+          better throughput.  It should not be enabled by default but
+          used when there is significant amount of work to keep the keep
+          the data lanes filled to get performance benefit.  If the data
+          lanes remain unfilled, a flush operation will be initiated to
+          process the crypto jobs, adding a slight latency.
+
 config CRYPTO_SHA256
        tristate "SHA224 and SHA256 digest algorithm"
        select CRYPTO_HASH