diff options
Diffstat (limited to 'lib/crypto/arm64/sha1.h')
-rw-r--r-- | lib/crypto/arm64/sha1.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/lib/crypto/arm64/sha1.h b/lib/crypto/arm64/sha1.h new file mode 100644 index 000000000000..f822563538cc --- /dev/null +++ b/lib/crypto/arm64/sha1.h @@ -0,0 +1,39 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * SHA-1 optimized for ARM64 + * + * Copyright 2025 Google LLC + */ +#include <asm/neon.h> +#include <asm/simd.h> +#include <linux/cpufeature.h> + +static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_ce); + +asmlinkage size_t __sha1_ce_transform(struct sha1_block_state *state, + const u8 *data, size_t nblocks); + +static void sha1_blocks(struct sha1_block_state *state, + const u8 *data, size_t nblocks) +{ + if (static_branch_likely(&have_ce) && likely(may_use_simd())) { + do { + size_t rem; + + kernel_neon_begin(); + rem = __sha1_ce_transform(state, data, nblocks); + kernel_neon_end(); + data += (nblocks - rem) * SHA1_BLOCK_SIZE; + nblocks = rem; + } while (nblocks); + } else { + sha1_blocks_generic(state, data, nblocks); + } +} + +#define sha1_mod_init_arch sha1_mod_init_arch +static inline void sha1_mod_init_arch(void) +{ + if (cpu_have_named_feature(SHA1)) + static_branch_enable(&have_ce); +} |