crypto: arm - move ARM specific Kconfig definitions to a dedicated file

This moves all Kconfig symbols defined in crypto/Kconfig that depend
on CONFIG_ARM to a dedicated Kconfig file in arch/arm/crypto, which is
where the code that implements those features resides as well.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 9f1f09a..e60da5a 100644 (file)
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -2167,6 +2167,9 @@ source "arch/arm/Kconfig.debug"
 source "security/Kconfig"
 
 source "crypto/Kconfig"
+if CRYPTO
+source "arch/arm/crypto/Kconfig"
+endif
 
 source "lib/Kconfig"
 

diff --git a/arch/arm/crypto/Kconfig b/arch/arm/crypto/Kconfig
new file mode 100644 (file)
index 0000000..66fe828
--- /dev/null
+++ b/arch/arm/crypto/Kconfig
@@ -0,0 +1,85 @@
+
+menuconfig ARM_CRYPTO
+       bool "ARM Accelerated Cryptographic Algorithms"
+       depends on ARM
+       help
+         Say Y here to choose from a selection of cryptographic algorithms
+         implemented using ARM specific CPU features or instructions.
+
+if ARM_CRYPTO
+
+config CRYPTO_SHA1_ARM
+       tristate "SHA1 digest algorithm (ARM-asm)"
+       select CRYPTO_SHA1
+       select CRYPTO_HASH
+       help
+         SHA-1 secure hash standard (FIPS 180-1/DFIPS 180-2) implemented
+         using optimized ARM assembler.
+
+config CRYPTO_SHA1_ARM_NEON
+       tristate "SHA1 digest algorithm (ARM NEON)"
+       depends on KERNEL_MODE_NEON
+       select CRYPTO_SHA1_ARM
+       select CRYPTO_SHA1
+       select CRYPTO_HASH
+       help
+         SHA-1 secure hash standard (FIPS 180-1/DFIPS 180-2) implemented
+         using optimized ARM NEON assembly, when NEON instructions are
+         available.
+
+config CRYPTO_SHA512_ARM_NEON
+       tristate "SHA384 and SHA512 digest algorithm (ARM NEON)"
+       depends on KERNEL_MODE_NEON
+       select CRYPTO_SHA512
+       select CRYPTO_HASH
+       help
+         SHA-512 secure hash standard (DFIPS 180-2) implemented
+         using ARM NEON instructions, when available.
+
+         This version of SHA implements a 512 bit hash with 256 bits of
+         security against collision attacks.
+
+         This code also includes SHA-384, a 384 bit hash with 192 bits
+         of security against collision attacks.
+
+config CRYPTO_AES_ARM
+       tristate "AES cipher algorithms (ARM-asm)"
+       depends on ARM
+       select CRYPTO_ALGAPI
+       select CRYPTO_AES
+       help
+         Use optimized AES assembler routines for ARM platforms.
+
+         AES cipher algorithms (FIPS-197). AES uses the Rijndael
+         algorithm.
+
+         Rijndael appears to be consistently a very good performer in
+         both hardware and software across a wide range of computing
+         environments regardless of its use in feedback or non-feedback
+         modes. Its key setup time is excellent, and its key agility is
+         good. Rijndael's very low memory requirements make it very well
+         suited for restricted-space environments, in which it also
+         demonstrates excellent performance. Rijndael's operations are
+         among the easiest to defend against power and timing attacks.
+
+         The AES specifies three key sizes: 128, 192 and 256 bits
+
+         See <http://csrc.nist.gov/encryption/aes/> for more information.
+
+config CRYPTO_AES_ARM_BS
+       tristate "Bit sliced AES using NEON instructions"
+       depends on 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.
+
+endif

diff --git a/crypto/Kconfig b/crypto/Kconfig
index 1afb0f6..8863993 100644 (file)
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -572,26 +572,6 @@ config CRYPTO_SHA1_SPARC64
          SHA-1 secure hash standard (FIPS 180-1/DFIPS 180-2) implemented
          using sparc64 crypto instructions, when available.
 
-config CRYPTO_SHA1_ARM
-       tristate "SHA1 digest algorithm (ARM-asm)"
-       depends on ARM
-       select CRYPTO_SHA1
-       select CRYPTO_HASH
-       help
-         SHA-1 secure hash standard (FIPS 180-1/DFIPS 180-2) implemented
-         using optimized ARM assembler.
-
-config CRYPTO_SHA1_ARM_NEON
-       tristate "SHA1 digest algorithm (ARM NEON)"
-       depends on ARM && KERNEL_MODE_NEON
-       select CRYPTO_SHA1_ARM
-       select CRYPTO_SHA1
-       select CRYPTO_HASH
-       help
-         SHA-1 secure hash standard (FIPS 180-1/DFIPS 180-2) implemented
-         using optimized ARM NEON assembly, when NEON instructions are
-         available.
-
 config CRYPTO_SHA1_PPC
        tristate "SHA1 digest algorithm (powerpc)"
        depends on PPC
@@ -691,21 +671,6 @@ config CRYPTO_SHA512_SPARC64
          SHA-512 secure hash standard (DFIPS 180-2) implemented
          using sparc64 crypto instructions, when available.
 
-config CRYPTO_SHA512_ARM_NEON
-       tristate "SHA384 and SHA512 digest algorithm (ARM NEON)"
-       depends on ARM && KERNEL_MODE_NEON
-       select CRYPTO_SHA512
-       select CRYPTO_HASH
-       help
-         SHA-512 secure hash standard (DFIPS 180-2) implemented
-         using ARM NEON instructions, when available.
-
-         This version of SHA implements a 512 bit hash with 256 bits of
-         security against collision attacks.
-
-         This code also includes SHA-384, a 384 bit hash with 192 bits
-         of security against collision attacks.
-
 config CRYPTO_TGR192
        tristate "Tiger digest algorithms"
        select CRYPTO_HASH
@@ -868,46 +833,6 @@ config CRYPTO_AES_SPARC64
          for some popular block cipher mode is supported too, including
          ECB and CBC.
 
-config CRYPTO_AES_ARM
-       tristate "AES cipher algorithms (ARM-asm)"
-       depends on ARM
-       select CRYPTO_ALGAPI
-       select CRYPTO_AES
-       help
-         Use optimized AES assembler routines for ARM platforms.
-
-         AES cipher algorithms (FIPS-197). AES uses the Rijndael
-         algorithm.
-
-         Rijndael appears to be consistently a very good performer in
-         both hardware and software across a wide range of computing
-         environments regardless of its use in feedback or non-feedback
-         modes. Its key setup time is excellent, and its key agility is
-         good. Rijndael's very low memory requirements make it very well
-         suited for restricted-space environments, in which it also
-         demonstrates excellent performance. Rijndael's operations are
-         among the easiest to defend against power and timing attacks.
-
-         The AES specifies three key sizes: 128, 192 and 256 bits
-
-         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_AES_PPC_SPE
        tristate "AES cipher algorithms (PPC SPE)"
        depends on PPC && SPE