linux-libre/arch/arm/crypto/Kconfig

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_SHA1_ARM_CE
	tristate "SHA1 digest algorithm (ARM v8 Crypto Extensions)"
	depends on KERNEL_MODE_NEON
	select CRYPTO_SHA1_ARM
	select CRYPTO_HASH
	help
	  SHA-1 secure hash standard (FIPS 180-1/DFIPS 180-2) implemented
	  using special ARMv8 Crypto Extensions.

config CRYPTO_SHA2_ARM_CE
	tristate "SHA-224/256 digest algorithm (ARM v8 Crypto Extensions)"
	depends on KERNEL_MODE_NEON
	select CRYPTO_SHA256_ARM
	select CRYPTO_HASH
	help
	  SHA-256 secure hash standard (DFIPS 180-2) implemented
	  using special ARMv8 Crypto Extensions.

config CRYPTO_SHA256_ARM
	tristate "SHA-224/256 digest algorithm (ARM-asm and NEON)"
	select CRYPTO_HASH
	depends on !CPU_V7M
	help
	  SHA-256 secure hash standard (DFIPS 180-2) implemented
	  using optimized ARM assembler and NEON, when available.

config CRYPTO_SHA512_ARM
	tristate "SHA-384/512 digest algorithm (ARM-asm and NEON)"
	select CRYPTO_HASH
	depends on !CPU_V7M
	help
	  SHA-512 secure hash standard (DFIPS 180-2) implemented
	  using optimized ARM assembler and NEON, when available.

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.

config CRYPTO_AES_ARM_CE
	tristate "Accelerated AES using ARMv8 Crypto Extensions"
	depends on KERNEL_MODE_NEON
	select CRYPTO_ALGAPI
	select CRYPTO_ABLK_HELPER
	help
	  Use an implementation of AES in CBC, CTR and XTS modes that uses
	  ARMv8 Crypto Extensions

config CRYPTO_GHASH_ARM_CE
	tristate "PMULL-accelerated GHASH using ARMv8 Crypto Extensions"
	depends on KERNEL_MODE_NEON
	select CRYPTO_HASH
	select CRYPTO_CRYPTD
	help
	  Use an implementation of GHASH (used by the GCM AEAD chaining mode)
	  that uses the 64x64 to 128 bit polynomial multiplication (vmull.p64)
	  that is part of the ARMv8 Crypto Extensions

endif