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| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2019-10-11 11:08:00 +0200 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2019-10-23 19:46:56 +1100 |
| commit | b4d0c0aad57ac3bd1b5141bac5ab1ab1d5e442b3 (patch) | |
| tree | ad70ab4bf9064808d352f8f5fb46a45ec7c0ba83 /arch/arm/crypto/Kconfig | |
| parent | 4549f7e5aa27ffc2cba63b5db8842a3b486f5688 (diff) | |
| download | lwn-b4d0c0aad57ac3bd1b5141bac5ab1ab1d5e442b3.tar.gz lwn-b4d0c0aad57ac3bd1b5141bac5ab1ab1d5e442b3.zip | |
crypto: arm - use Kconfig based compiler checks for crypto opcodes
Instead of allowing the Crypto Extensions algorithms to be selected when
using a toolchain that does not support them, and complain about it at
build time, use the information we have about the compiler to prevent
them from being selected in the first place. Users that are stuck with
a GCC version <4.8 are unlikely to care about these routines anyway, and
it cleans up the Makefile considerably.
While at it, add explicit 'armv8-a' CPU specifiers to the code that uses
the 'crypto-neon-fp-armv8' FPU specifier so we don't regress Clang, which
will complain about this in version 10 and later.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'arch/arm/crypto/Kconfig')
| -rw-r--r-- | arch/arm/crypto/Kconfig | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/arch/arm/crypto/Kconfig b/arch/arm/crypto/Kconfig index b24df84a1d7a..9f257c1bf32b 100644 --- a/arch/arm/crypto/Kconfig +++ b/arch/arm/crypto/Kconfig @@ -30,7 +30,7 @@ config CRYPTO_SHA1_ARM_NEON config CRYPTO_SHA1_ARM_CE tristate "SHA1 digest algorithm (ARM v8 Crypto Extensions)" - depends on KERNEL_MODE_NEON + depends on KERNEL_MODE_NEON && (CC_IS_CLANG || GCC_VERSION >= 40800) select CRYPTO_SHA1_ARM select CRYPTO_HASH help @@ -39,7 +39,7 @@ config CRYPTO_SHA1_ARM_CE config CRYPTO_SHA2_ARM_CE tristate "SHA-224/256 digest algorithm (ARM v8 Crypto Extensions)" - depends on KERNEL_MODE_NEON + depends on KERNEL_MODE_NEON && (CC_IS_CLANG || GCC_VERSION >= 40800) select CRYPTO_SHA256_ARM select CRYPTO_HASH help @@ -96,7 +96,7 @@ config CRYPTO_AES_ARM_BS config CRYPTO_AES_ARM_CE tristate "Accelerated AES using ARMv8 Crypto Extensions" - depends on KERNEL_MODE_NEON + depends on KERNEL_MODE_NEON && (CC_IS_CLANG || GCC_VERSION >= 40800) select CRYPTO_BLKCIPHER select CRYPTO_SIMD help @@ -105,7 +105,7 @@ config CRYPTO_AES_ARM_CE config CRYPTO_GHASH_ARM_CE tristate "PMULL-accelerated GHASH using NEON/ARMv8 Crypto Extensions" - depends on KERNEL_MODE_NEON + depends on KERNEL_MODE_NEON && (CC_IS_CLANG || GCC_VERSION >= 40800) select CRYPTO_HASH select CRYPTO_CRYPTD select CRYPTO_GF128MUL @@ -117,12 +117,14 @@ config CRYPTO_GHASH_ARM_CE config CRYPTO_CRCT10DIF_ARM_CE tristate "CRCT10DIF digest algorithm using PMULL instructions" - depends on KERNEL_MODE_NEON && CRC_T10DIF + depends on KERNEL_MODE_NEON && (CC_IS_CLANG || GCC_VERSION >= 40800) + depends on CRC_T10DIF select CRYPTO_HASH config CRYPTO_CRC32_ARM_CE tristate "CRC32(C) digest algorithm using CRC and/or PMULL instructions" - depends on KERNEL_MODE_NEON && CRC32 + depends on KERNEL_MODE_NEON && (CC_IS_CLANG || GCC_VERSION >= 40800) + depends on CRC32 select CRYPTO_HASH config CRYPTO_CHACHA20_NEON |