ARM: multi_v7_defconfig: Enable s5p-secss driver

The Exynos SoC provides a Security SubSystem block for accelerating some
cryptographic operations.  Enable the driver for it - s5p-secss to
utilize the hardware acceleration.

Currently the s5p-secss driver supports AES in CBC and ECB modes.
However its usefulness could be doubted. Excerpt of tests on Odroid XU3
(Exynos5422), for 256 bit key, encryption, performance CPU freq governor:

  algorithm        | block size [b] | average speed [MB/s] |
  cbc-aes-s5p      |             16 |                 11.5 |
  cbc-aes-s5p      |             64 |                 25.4 |
  cbc-aes-s5p      |            256 |                 41.0 |
  cbc-aes-s5p      |           1024 |                 47.4 |
  cbc-aes-s5p      |           8192 |                 49.0 |
  cbc(aes-generic) |             16 |                  0.4 |
  cbc(aes-generic) |             64 |                  1.8 |
  cbc(aes-generic) |            256 |                  6.6 |
  cbc(aes-generic) |           1024 |                 25.2 |
  cbc(aes-generic) |           8192 |                 83.1 |

Anyway enable the driver so it will get some testing coverage by
community.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>

diff --git a/arch/arm/configs/multi_v7_defconfig b/arch/arm/configs/multi_v7_defconfig
index 1e94e179f783c6952db517c82f72a6b44822391e..29729448b9dc9fe825e69e4412ac45736944d968 100644 (file)
--- a/arch/arm/configs/multi_v7_defconfig
+++ b/arch/arm/configs/multi_v7_defconfig
@@ -873,6 +873,7 @@ CONFIG_KEYSTONE_IRQ=y
 CONFIG_HW_RANDOM=y
 CONFIG_HW_RANDOM_ST=y
 CONFIG_CRYPTO_DEV_MARVELL_CESA=m
+CONFIG_CRYPTO_DEV_S5P=m
 CONFIG_CRYPTO_DEV_SUN4I_SS=m
 CONFIG_CRYPTO_DEV_ROCKCHIP=m
 CONFIG_ARM_CRYPTO=y