sha512.h

 1/* SPDX-License-Identifier: GPL-2.0-or-later */
 2/*
 3 * arm32-optimized SHA-512 block function
 4 *
 5 * Copyright 2025 Google LLC
 6 */
 7#include <asm/neon.h>
 8#include <asm/simd.h>
 9
10static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_neon);
11
12asmlinkage void sha512_block_data_order(struct sha512_block_state *state,
13					const u8 *data, size_t nblocks);
14asmlinkage void sha512_block_data_order_neon(struct sha512_block_state *state,
15					     const u8 *data, size_t nblocks);
16
17static void sha512_blocks(struct sha512_block_state *state,
18			  const u8 *data, size_t nblocks)
19{
20	if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) &&
21	    static_branch_likely(&have_neon) && likely(may_use_simd())) {
22		scoped_ksimd()
23			sha512_block_data_order_neon(state, data, nblocks);
24	} else {
25		sha512_block_data_order(state, data, nblocks);
26	}
27}
28
29#ifdef CONFIG_KERNEL_MODE_NEON
30#define sha512_mod_init_arch sha512_mod_init_arch
31static void sha512_mod_init_arch(void)
32{
33	if (cpu_has_neon())
34		static_branch_enable(&have_neon);
35}
36#endif /* CONFIG_KERNEL_MODE_NEON */