1*24c91b62SEric Biggers /* SPDX-License-Identifier: GPL-2.0-or-later */
2*24c91b62SEric Biggers /*
3*24c91b62SEric Biggers * arm32-optimized SHA-512 block function
4*24c91b62SEric Biggers *
5*24c91b62SEric Biggers * Copyright 2025 Google LLC
6*24c91b62SEric Biggers */
7*24c91b62SEric Biggers
8*24c91b62SEric Biggers #include <asm/neon.h>
9*24c91b62SEric Biggers #include <crypto/internal/simd.h>
10*24c91b62SEric Biggers
11*24c91b62SEric Biggers static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_neon);
12*24c91b62SEric Biggers
13*24c91b62SEric Biggers asmlinkage void sha512_block_data_order(struct sha512_block_state *state,
14*24c91b62SEric Biggers const u8 *data, size_t nblocks);
15*24c91b62SEric Biggers asmlinkage void sha512_block_data_order_neon(struct sha512_block_state *state,
16*24c91b62SEric Biggers const u8 *data, size_t nblocks);
17*24c91b62SEric Biggers
sha512_blocks(struct sha512_block_state * state,const u8 * data,size_t nblocks)18*24c91b62SEric Biggers static void sha512_blocks(struct sha512_block_state *state,
19*24c91b62SEric Biggers const u8 *data, size_t nblocks)
20*24c91b62SEric Biggers {
21*24c91b62SEric Biggers if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) &&
22*24c91b62SEric Biggers static_branch_likely(&have_neon) && likely(crypto_simd_usable())) {
23*24c91b62SEric Biggers kernel_neon_begin();
24*24c91b62SEric Biggers sha512_block_data_order_neon(state, data, nblocks);
25*24c91b62SEric Biggers kernel_neon_end();
26*24c91b62SEric Biggers } else {
27*24c91b62SEric Biggers sha512_block_data_order(state, data, nblocks);
28*24c91b62SEric Biggers }
29*24c91b62SEric Biggers }
30*24c91b62SEric Biggers
31*24c91b62SEric Biggers #ifdef CONFIG_KERNEL_MODE_NEON
32*24c91b62SEric Biggers #define sha512_mod_init_arch sha512_mod_init_arch
sha512_mod_init_arch(void)33*24c91b62SEric Biggers static inline void sha512_mod_init_arch(void)
34*24c91b62SEric Biggers {
35*24c91b62SEric Biggers if (cpu_has_neon())
36*24c91b62SEric Biggers static_branch_enable(&have_neon);
37*24c91b62SEric Biggers }
38*24c91b62SEric Biggers #endif /* CONFIG_KERNEL_MODE_NEON */
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