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29e39a11f5
Migrate the arm32 NEON implementation of NH into lib/crypto/. This makes the nh() function be optimized on arm32 kernels. Note: this temporarily makes the adiantum template not utilize the arm32 optimized NH code. This is resolved in a later commit that converts the adiantum template to use nh() instead of "nhpoly1305". Link: https://lore.kernel.org/r/20251211011846.8179-4-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers@kernel.org>
33 lines
778 B
C
33 lines
778 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* ARM32 accelerated implementation of NH
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*
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* Copyright 2018 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 nh_neon(const u32 *key, const u8 *message, size_t message_len,
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__le64 hash[NH_NUM_PASSES]);
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static bool nh_arch(const u32 *key, const u8 *message, size_t message_len,
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__le64 hash[NH_NUM_PASSES])
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{
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if (static_branch_likely(&have_neon) && message_len >= 64 &&
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may_use_simd()) {
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scoped_ksimd()
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nh_neon(key, message, message_len, hash);
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return true;
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}
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return false;
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}
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#define nh_mod_init_arch nh_mod_init_arch
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static void nh_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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