diff options
Diffstat (limited to 'arch/powerpc/crypto/Kconfig')
| -rw-r--r-- | arch/powerpc/crypto/Kconfig | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/arch/powerpc/crypto/Kconfig b/arch/powerpc/crypto/Kconfig index 5a4770a029ef..c1b964447401 100644 --- a/arch/powerpc/crypto/Kconfig +++ b/arch/powerpc/crypto/Kconfig @@ -73,12 +73,20 @@ config CRYPTO_SHA256_PPC_SPE - SPE (Signal Processing Engine) extensions config CRYPTO_AES_PPC_SPE - tristate "AES cipher algorithms (PPC SPE)" + tristate "Ciphers: AES, modes: ECB/CBC/CTR/XTS (SPE)" depends on PPC && SPE select CRYPTO_SKCIPHER help - AES cipher algorithms (FIPS-197). Additionally the acceleration - for popular block cipher modes ECB, CBC, CTR and XTS is supported. + Block ciphers: AES cipher algorithms (FIPS-197) + Length-preserving ciphers: AES with ECB, CBC, CTR, and XTS modes + + Architecture: powerpc using: + - SPE (Signal Processing Engine) extensions + + SPE is available for: + - Processor Type: Freescale 8500 + - CPU selection: e500 (8540) + 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 |