diff options
Diffstat (limited to 'lib/crypto/arm64/sha512.h')
| -rw-r--r-- | lib/crypto/arm64/sha512.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/lib/crypto/arm64/sha512.h b/lib/crypto/arm64/sha512.h new file mode 100644 index 000000000000..7eb7ef04d268 --- /dev/null +++ b/lib/crypto/arm64/sha512.h @@ -0,0 +1,45 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * arm64-optimized SHA-512 block function + * + * Copyright 2025 Google LLC + */ + +#include <asm/simd.h> +#include <linux/cpufeature.h> + +static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_sha512_insns); + +asmlinkage void sha512_block_data_order(struct sha512_block_state *state, + const u8 *data, size_t nblocks); +asmlinkage size_t __sha512_ce_transform(struct sha512_block_state *state, + const u8 *data, size_t nblocks); + +static void sha512_blocks(struct sha512_block_state *state, + const u8 *data, size_t nblocks) +{ + if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && + static_branch_likely(&have_sha512_insns) && + likely(may_use_simd())) { + do { + size_t rem; + + scoped_ksimd() + rem = __sha512_ce_transform(state, data, nblocks); + + data += (nblocks - rem) * SHA512_BLOCK_SIZE; + nblocks = rem; + } while (nblocks); + } else { + sha512_block_data_order(state, data, nblocks); + } +} + +#ifdef CONFIG_KERNEL_MODE_NEON +#define sha512_mod_init_arch sha512_mod_init_arch +static void sha512_mod_init_arch(void) +{ + if (cpu_have_named_feature(SHA512)) + static_branch_enable(&have_sha512_insns); +} +#endif /* CONFIG_KERNEL_MODE_NEON */ |