44 lines
1.1 KiB
C
44 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* GHASH, arm optimized
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*
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* Copyright 2026 Google LLC
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*/
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#include <asm/hwcap.h>
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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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void pmull_ghash_update_p8(size_t blocks, struct polyval_elem *dg,
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const u8 *src, const struct polyval_elem *h);
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#define ghash_blocks_arch ghash_blocks_arch
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static void ghash_blocks_arch(struct polyval_elem *acc,
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const struct ghash_key *key,
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const u8 *data, size_t nblocks)
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{
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if (static_branch_likely(&have_neon) && may_use_simd()) {
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do {
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/* Allow rescheduling every 4 KiB. */
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size_t n =
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min_t(size_t, nblocks, 4096 / GHASH_BLOCK_SIZE);
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scoped_ksimd()
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pmull_ghash_update_p8(n, acc, data, &key->h);
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data += n * GHASH_BLOCK_SIZE;
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nblocks -= n;
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} while (nblocks);
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} else {
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ghash_blocks_generic(acc, &key->h, data, nblocks);
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}
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}
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#define gf128hash_mod_init_arch gf128hash_mod_init_arch
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static void gf128hash_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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