crypto: powerpc/aes - kernel config

Integrate the module into the kernel configuration

Signed-off-by: Markus Stockhausen <stockhausen@collogia.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 13 insertions, 0 deletions

diff --git a/crypto/Kconfig b/crypto/Kconfig
index 2ca8d15e0b6f..14106b267c6f 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -866,6 +866,19 @@ config CRYPTO_AES_ARM_BS
           This implementation does not rely on any lookup tables so it is
           believed to be invulnerable to cache timing attacks.
 
+config CRYPTO_AES_PPC_SPE
+        tristate "AES cipher algorithms (PPC SPE)"
+        depends on PPC && SPE
+        help
+          AES cipher algorithms (FIPS-197). Additionally the acceleration
+          for popular block cipher modes ECB, CBC, CTR and XTS is supported.
+          This module should only be used for low power (router) devices
+          without hardware AES acceleration (e.g. caam crypto). It reduces the
+          size of the AES tables from 16KB to 8KB + 256 bytes and mitigates
+          timining attacks. Nevertheless it might be not as secure as other
+          architecture specific assembler implementations that work on 1KB
+          tables or 256 bytes S-boxes.
+
 config CRYPTO_ANUBIS
         tristate "Anubis cipher algorithm"
         select CRYPTO_ALGAPI