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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* BLAKE2b digest algorithm, NEON accelerated
*
* Copyright 2020 Google LLC
*/
#include <asm/neon.h>
#include <asm/simd.h>
static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_neon);
asmlinkage void blake2b_compress_neon(struct blake2b_ctx *ctx,
const u8 *data, size_t nblocks, u32 inc);
static void blake2b_compress(struct blake2b_ctx *ctx,
const u8 *data, size_t nblocks, u32 inc)
{
if (!static_branch_likely(&have_neon) || !may_use_simd()) {
blake2b_compress_generic(ctx, data, nblocks, inc);
return;
}
do {
const size_t blocks = min_t(size_t, nblocks,
SZ_4K / BLAKE2B_BLOCK_SIZE);
scoped_ksimd()
blake2b_compress_neon(ctx, data, blocks, inc);
data += blocks * BLAKE2B_BLOCK_SIZE;
nblocks -= blocks;
} while (nblocks);
}
#define blake2b_mod_init_arch blake2b_mod_init_arch
static void blake2b_mod_init_arch(void)
{
if (elf_hwcap & HWCAP_NEON)
static_branch_enable(&have_neon);
}
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