diff options
Diffstat (limited to 'arch/arm/crypto/sha256_neon_glue.c')
-rw-r--r-- | arch/arm/crypto/sha256_neon_glue.c | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/arch/arm/crypto/sha256_neon_glue.c b/arch/arm/crypto/sha256_neon_glue.c new file mode 100644 index 0000000000..ccdcfff719 --- /dev/null +++ b/arch/arm/crypto/sha256_neon_glue.c @@ -0,0 +1,92 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Glue code for the SHA256 Secure Hash Algorithm assembly implementation + * using NEON instructions. + * + * Copyright © 2015 Google Inc. + * + * This file is based on sha512_neon_glue.c: + * Copyright © 2014 Jussi Kivilinna <jussi.kivilinna@iki.fi> + */ + +#include <crypto/internal/hash.h> +#include <crypto/internal/simd.h> +#include <linux/types.h> +#include <linux/string.h> +#include <crypto/sha2.h> +#include <crypto/sha256_base.h> +#include <asm/byteorder.h> +#include <asm/simd.h> +#include <asm/neon.h> + +#include "sha256_glue.h" + +asmlinkage void sha256_block_data_order_neon(struct sha256_state *digest, + const u8 *data, int num_blks); + +static int crypto_sha256_neon_update(struct shash_desc *desc, const u8 *data, + unsigned int len) +{ + struct sha256_state *sctx = shash_desc_ctx(desc); + + if (!crypto_simd_usable() || + (sctx->count % SHA256_BLOCK_SIZE) + len < SHA256_BLOCK_SIZE) + return crypto_sha256_arm_update(desc, data, len); + + kernel_neon_begin(); + sha256_base_do_update(desc, data, len, sha256_block_data_order_neon); + kernel_neon_end(); + + return 0; +} + +static int crypto_sha256_neon_finup(struct shash_desc *desc, const u8 *data, + unsigned int len, u8 *out) +{ + if (!crypto_simd_usable()) + return crypto_sha256_arm_finup(desc, data, len, out); + + kernel_neon_begin(); + if (len) + sha256_base_do_update(desc, data, len, + sha256_block_data_order_neon); + sha256_base_do_finalize(desc, sha256_block_data_order_neon); + kernel_neon_end(); + + return sha256_base_finish(desc, out); +} + +static int crypto_sha256_neon_final(struct shash_desc *desc, u8 *out) +{ + return crypto_sha256_neon_finup(desc, NULL, 0, out); +} + +struct shash_alg sha256_neon_algs[] = { { + .digestsize = SHA256_DIGEST_SIZE, + .init = sha256_base_init, + .update = crypto_sha256_neon_update, + .final = crypto_sha256_neon_final, + .finup = crypto_sha256_neon_finup, + .descsize = sizeof(struct sha256_state), + .base = { + .cra_name = "sha256", + .cra_driver_name = "sha256-neon", + .cra_priority = 250, + .cra_blocksize = SHA256_BLOCK_SIZE, + .cra_module = THIS_MODULE, + } +}, { + .digestsize = SHA224_DIGEST_SIZE, + .init = sha224_base_init, + .update = crypto_sha256_neon_update, + .final = crypto_sha256_neon_final, + .finup = crypto_sha256_neon_finup, + .descsize = sizeof(struct sha256_state), + .base = { + .cra_name = "sha224", + .cra_driver_name = "sha224-neon", + .cra_priority = 250, + .cra_blocksize = SHA224_BLOCK_SIZE, + .cra_module = THIS_MODULE, + } +} }; |