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
8 #include <asm/neon.h>
9 #include <crypto/internal/simd.h>
10
11 static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_neon);
12
13 asmlinkage void sha512_block_data_order(struct sha512_block_state *state,
14 const u8 *data, size_t nblocks);
15 asmlinkage void sha512_block_data_order_neon(struct sha512_block_state *state,
16 const u8 *data, size_t nblocks);
17
sha512_blocks(struct sha512_block_state * state,const u8 * data,size_t nblocks)18 static void sha512_blocks(struct sha512_block_state *state,
19 const u8 *data, size_t nblocks)
20 {
21 if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) &&
22 static_branch_likely(&have_neon) && likely(crypto_simd_usable())) {
23 kernel_neon_begin();
24 sha512_block_data_order_neon(state, data, nblocks);
25 kernel_neon_end();
26 } else {
27 sha512_block_data_order(state, data, nblocks);
28 }
29 }
30
31 #ifdef CONFIG_KERNEL_MODE_NEON
32 #define sha512_mod_init_arch sha512_mod_init_arch
sha512_mod_init_arch(void)33 static inline void sha512_mod_init_arch(void)
34 {
35 if (cpu_has_neon())
36 static_branch_enable(&have_neon);
37 }
38 #endif /* CONFIG_KERNEL_MODE_NEON */
39