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crypto: mips/chacha - wire up accelerated 32r2 code from Zinc

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This integrates the accelerated MIPS 32r2 implementation of ChaCha
into both the API and library interfaces of the kernel crypto stack.

The significance of this is that, in addition to becoming available
as an accelerated library implementation, it can also be used by
existing crypto API code such as Adiantum (for block encryption on
ultra low performance cores) or IPsec using chacha20poly1305. These
are use cases that have already opted into using the abstract crypto
API. In order to support Adiantum, the core assembler routine has
been adapted to take the round count as a function argument rather
than hardcoding it to 20.

Co-developed-by: René van Dorst <opensource@vdorst.com>
Signed-off-by: René van Dorst <opensource@vdorst.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Ard Biesheuvel
2019-11-08 13:22:17 +01:00
committed by Herbert Xu
parent 49aa7c00ed
commit 3a2f58f3ba
5 changed files with 277 additions and 44 deletions
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6
crypto/Kconfig
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@@ -1442,6 +1442,12 @@ config CRYPTO_CHACHA20_X86_64
SSSE3, AVX2, and AVX-512VL optimized implementations of the ChaCha20,
XChaCha20, and XChaCha12 stream ciphers.
config CRYPTO_CHACHA_MIPS
tristate "ChaCha stream cipher algorithms (MIPS 32r2 optimized)"
depends on CPU_MIPS32_R2
select CRYPTO_BLKCIPHER
select CRYPTO_ARCH_HAVE_LIB_CHACHA
config CRYPTO_SEED
tristate "SEED cipher algorithm"
select CRYPTO_ALGAPI