1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * arm64-optimized SHA-512 block function 4 * 5 * Copyright 2025 Google LLC 6 */ 7 8 #include <asm/simd.h> 9 #include <linux/cpufeature.h> 10 11 static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_sha512_insns); 12 13 asmlinkage void sha512_block_data_order(struct sha512_block_state *state, 14 const u8 *data, size_t nblocks); 15 asmlinkage void sha512_ce_transform(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 (static_branch_likely(&have_sha512_insns) && 22 likely(may_use_simd())) { 23 scoped_ksimd() 24 sha512_ce_transform(state, data, nblocks); 25 } else { 26 sha512_block_data_order(state, data, nblocks); 27 } 28 } 29 30 #define sha512_mod_init_arch sha512_mod_init_arch 31 static void sha512_mod_init_arch(void) 32 { 33 if (cpu_have_named_feature(SHA512)) 34 static_branch_enable(&have_sha512_insns); 35 } 36