Merge tag 'for-linus-20131112' of git://git.infradead.org/linux-mtd

[linux-drm-fsl-dcu.git] / crypto / Kconfig

diff --git a/crypto/Kconfig b/crypto/Kconfig
index 69ce573f1224560b4f5c7532e21053b27c651da4..71f337aefa3905feaca892b7ac3b49b4bcb411e3 100644 (file)
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -776,6 +776,22 @@ config CRYPTO_AES_ARM
 
          See <http://csrc.nist.gov/encryption/aes/> for more information.
 
+config CRYPTO_AES_ARM_BS
+       tristate "Bit sliced AES using NEON instructions"
+       depends on ARM && KERNEL_MODE_NEON
+       select CRYPTO_ALGAPI
+       select CRYPTO_AES_ARM
+       select CRYPTO_ABLK_HELPER
+       help
+         Use a faster and more secure NEON based implementation of AES in CBC,
+         CTR and XTS modes
+
+         Bit sliced AES gives around 45% speedup on Cortex-A15 for CTR mode
+         and for XTS mode encryption, CBC and XTS mode decryption speedup is
+         around 25%. (CBC encryption speed is not affected by this driver.)
+         This implementation does not rely on any lookup tables so it is
+         believed to be invulnerable to cache timing attacks.
+
 config CRYPTO_ANUBIS
        tristate "Anubis cipher algorithm"
        select CRYPTO_ALGAPI