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lib/crypto: riscv/aes: Migrate optimized code into library

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Move the aes_encrypt_zvkned() and aes_decrypt_zvkned() assembly
functions into lib/crypto/, wire them up to the AES library API, and
remove the "aes-riscv64-zvkned" crypto_cipher algorithm.

To make this possible, change the prototypes of these functions to
take (rndkeys, key_len) instead of a pointer to crypto_aes_ctx, and
change the RISC-V AES-XTS code to implement tweak encryption using the
AES library instead of directly calling aes_encrypt_zvkned().

The result is that both the AES library and crypto_cipher APIs use
RISC-V's AES instructions, whereas previously only crypto_cipher did
(and it wasn't enabled by default, which this commit fixes as well).

Acked-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20260112192035.10427-15-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
This commit is contained in:
Eric Biggers
2026-01-12 11:20:12 -08:00
parent 7cf2082e74
commit a4e573db06
8 changed files with 166 additions and 106 deletions
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2
lib/crypto/Kconfig
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@@ -17,6 +17,8 @@ config CRYPTO_LIB_AES_ARCH
default y if ARM
default y if ARM64
default y if PPC && (SPE || (PPC64 && VSX))
default y if RISCV && 64BIT && TOOLCHAIN_HAS_VECTOR_CRYPTO && \
RISCV_EFFICIENT_VECTOR_UNALIGNED_ACCESS
config CRYPTO_LIB_AESCFB
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