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c0d597e016
Even though ARM's versions of kernel_neon_begin()/_end() are not being changed, update the newly migrated ARM blake2b to the scoped ksimd API so that all ARM and arm64 in lib/crypto remains consistent in this manner. Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Eric Biggers <ebiggers@kernel.org>
41 lines
991 B
C
41 lines
991 B
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* BLAKE2b digest algorithm, NEON accelerated
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*
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* Copyright 2020 Google LLC
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*/
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#include <asm/neon.h>
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#include <asm/simd.h>
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static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_neon);
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asmlinkage void blake2b_compress_neon(struct blake2b_ctx *ctx,
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const u8 *data, size_t nblocks, u32 inc);
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static void blake2b_compress(struct blake2b_ctx *ctx,
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const u8 *data, size_t nblocks, u32 inc)
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{
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if (!static_branch_likely(&have_neon) || !may_use_simd()) {
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blake2b_compress_generic(ctx, data, nblocks, inc);
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return;
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}
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do {
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const size_t blocks = min_t(size_t, nblocks,
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SZ_4K / BLAKE2B_BLOCK_SIZE);
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scoped_ksimd()
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blake2b_compress_neon(ctx, data, blocks, inc);
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data += blocks * BLAKE2B_BLOCK_SIZE;
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nblocks -= blocks;
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} while (nblocks);
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}
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#define blake2b_mod_init_arch blake2b_mod_init_arch
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static void blake2b_mod_init_arch(void)
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{
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if (elf_hwcap & HWCAP_NEON)
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static_branch_enable(&have_neon);
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}
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