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 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 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