diff options
| author | Eric Biggers <ebiggers@kernel.org> | 2026-03-19 09:17:03 +0300 |
|---|---|---|
| committer | Eric Biggers <ebiggers@kernel.org> | 2026-03-23 23:15:13 +0300 |
| commit | b3b6e8f9b38911e9b30a5abe845541ade0797327 (patch) | |
| tree | 5df620d67e2a820b1c9eb2847967ae64753d061a /include | |
| parent | 61f66c5216a961784b12307be60a25204525605c (diff) | |
| download | linux-b3b6e8f9b38911e9b30a5abe845541ade0797327.tar.xz | |
lib/crypto: gf128hash: Support GF128HASH_ARCH without all POLYVAL functions
Currently, some architectures (arm64 and x86) have optimized code for
both GHASH and POLYVAL. Others (arm, powerpc, riscv, and s390) have
optimized code only for GHASH. While POLYVAL support could be
implemented on these other architectures, until then we need to support
the case where arch-optimized functions are present only for GHASH.
Therefore, update the support for arch-optimized POLYVAL functions to
allow architectures to opt into supporting these functions individually.
The new meaning of CONFIG_CRYPTO_LIB_GF128HASH_ARCH is that some level
of GHASH and/or POLYVAL acceleration is provided.
Also provide an implementation of polyval_mul() based on
polyval_blocks_arch(), for when polyval_mul_arch() isn't implemented.
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20260319061723.1140720-3-ebiggers@kernel.org
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/crypto/gf128hash.h | 22 |
1 files changed, 3 insertions, 19 deletions
diff --git a/include/crypto/gf128hash.h b/include/crypto/gf128hash.h index 5ffa86f5c13f..1052041e3499 100644 --- a/include/crypto/gf128hash.h +++ b/include/crypto/gf128hash.h @@ -44,20 +44,14 @@ struct polyval_elem { * exponentiation repeats the POLYVAL dot operation, with its "extra" x^-128. */ struct polyval_key { -#ifdef CONFIG_CRYPTO_LIB_GF128HASH_ARCH -#ifdef CONFIG_ARM64 - /** @h_powers: Powers of the hash key H^8 through H^1 */ - struct polyval_elem h_powers[8]; -#elif defined(CONFIG_X86) +#if defined(CONFIG_CRYPTO_LIB_GF128HASH_ARCH) && \ + (defined(CONFIG_ARM64) || defined(CONFIG_X86)) /** @h_powers: Powers of the hash key H^8 through H^1 */ struct polyval_elem h_powers[8]; #else -#error "Unhandled arch" -#endif -#else /* CONFIG_CRYPTO_LIB_GF128HASH_ARCH */ /** @h: The hash key H */ struct polyval_elem h; -#endif /* !CONFIG_CRYPTO_LIB_GF128HASH_ARCH */ +#endif }; /** @@ -84,19 +78,9 @@ struct polyval_ctx { * * Context: Any context. */ -#ifdef CONFIG_CRYPTO_LIB_GF128HASH_ARCH void polyval_preparekey(struct polyval_key *key, const u8 raw_key[POLYVAL_BLOCK_SIZE]); -#else -static inline void polyval_preparekey(struct polyval_key *key, - const u8 raw_key[POLYVAL_BLOCK_SIZE]) -{ - /* Just a simple copy, so inline it. */ - memcpy(key->h.bytes, raw_key, POLYVAL_BLOCK_SIZE); -} -#endif - /** * polyval_init() - Initialize a POLYVAL context for a new message * @ctx: The context to initialize |