1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * sha512-neon-glue.c - accelerated SHA-384/512 for ARM NEON 4 * 5 * Copyright (C) 2015 Linaro Ltd <ard.biesheuvel@linaro.org> 6 */ 7 8 #include <crypto/internal/hash.h> 9 #include <crypto/internal/simd.h> 10 #include <crypto/sha2.h> 11 #include <crypto/sha512_base.h> 12 #include <linux/crypto.h> 13 #include <linux/module.h> 14 15 #include <asm/simd.h> 16 #include <asm/neon.h> 17 18 #include "sha512.h" 19 20 MODULE_ALIAS_CRYPTO("sha384-neon"); 21 MODULE_ALIAS_CRYPTO("sha512-neon"); 22 23 asmlinkage void sha512_block_data_order_neon(struct sha512_state *state, 24 const u8 *src, int blocks); 25 26 static int sha512_neon_update(struct shash_desc *desc, const u8 *data, 27 unsigned int len) 28 { 29 struct sha512_state *sctx = shash_desc_ctx(desc); 30 31 if (!crypto_simd_usable() || 32 (sctx->count[0] % SHA512_BLOCK_SIZE) + len < SHA512_BLOCK_SIZE) 33 return sha512_arm_update(desc, data, len); 34 35 kernel_neon_begin(); 36 sha512_base_do_update(desc, data, len, sha512_block_data_order_neon); 37 kernel_neon_end(); 38 39 return 0; 40 } 41 42 static int sha512_neon_finup(struct shash_desc *desc, const u8 *data, 43 unsigned int len, u8 *out) 44 { 45 if (!crypto_simd_usable()) 46 return sha512_arm_finup(desc, data, len, out); 47 48 kernel_neon_begin(); 49 if (len) 50 sha512_base_do_update(desc, data, len, 51 sha512_block_data_order_neon); 52 sha512_base_do_finalize(desc, sha512_block_data_order_neon); 53 kernel_neon_end(); 54 55 return sha512_base_finish(desc, out); 56 } 57 58 static int sha512_neon_final(struct shash_desc *desc, u8 *out) 59 { 60 return sha512_neon_finup(desc, NULL, 0, out); 61 } 62 63 struct shash_alg sha512_neon_algs[] = { { 64 .init = sha384_base_init, 65 .update = sha512_neon_update, 66 .final = sha512_neon_final, 67 .finup = sha512_neon_finup, 68 .descsize = sizeof(struct sha512_state), 69 .digestsize = SHA384_DIGEST_SIZE, 70 .base = { 71 .cra_name = "sha384", 72 .cra_driver_name = "sha384-neon", 73 .cra_priority = 300, 74 .cra_blocksize = SHA384_BLOCK_SIZE, 75 .cra_module = THIS_MODULE, 76 77 } 78 }, { 79 .init = sha512_base_init, 80 .update = sha512_neon_update, 81 .final = sha512_neon_final, 82 .finup = sha512_neon_finup, 83 .descsize = sizeof(struct sha512_state), 84 .digestsize = SHA512_DIGEST_SIZE, 85 .base = { 86 .cra_name = "sha512", 87 .cra_driver_name = "sha512-neon", 88 .cra_priority = 300, 89 .cra_blocksize = SHA512_BLOCK_SIZE, 90 .cra_module = THIS_MODULE, 91 } 92 } }; 93