powerpc: Add a powerpc implementation of SHA-1

This patch adds a crypto driver which provides a powerpc accelerated
implementation of SHA-1, accelerated in that it is written in asm.

Original patch by Paul, minor fixups for upstream by moi.

Lightly tested on 64-bit with the test program here:

 http://michael.ellerman.id.au/files/junkcode/sha1test.c

Seems to work, and is "not slower" than the generic version.

Needs testing on 32-bit.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/crypto/Kconfig b/crypto/Kconfig
index 4641d95651d3..8e6ae5ed8379 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -479,6 +479,13 @@ config CRYPTO_SHA1_ARM
           SHA-1 secure hash standard (FIPS 180-1/DFIPS 180-2) implemented
           using optimized ARM assembler.
 
+config CRYPTO_SHA1_PPC
+        tristate "SHA1 digest algorithm (powerpc)"
+        depends on PPC
+        help
+          This is the powerpc hardware accelerated implementation of the
+          SHA-1 secure hash standard (FIPS 180-1/DFIPS 180-2).
+
 config CRYPTO_SHA256
         tristate "SHA224 and SHA256 digest algorithm"
         select CRYPTO_HASH