cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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sha512-neon-glue.c (2405B)

      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
     20MODULE_ALIAS_CRYPTO("sha384-neon");
     21MODULE_ALIAS_CRYPTO("sha512-neon");
     22
     23asmlinkage void sha512_block_data_order_neon(u64 *state, u8 const *src,
     24					     int blocks);
     25
     26static 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,
     37		(sha512_block_fn *)sha512_block_data_order_neon);
     38	kernel_neon_end();
     39
     40	return 0;
     41}
     42
     43static int sha512_neon_finup(struct shash_desc *desc, const u8 *data,
     44			     unsigned int len, u8 *out)
     45{
     46	if (!crypto_simd_usable())
     47		return sha512_arm_finup(desc, data, len, out);
     48
     49	kernel_neon_begin();
     50	if (len)
     51		sha512_base_do_update(desc, data, len,
     52			(sha512_block_fn *)sha512_block_data_order_neon);
     53	sha512_base_do_finalize(desc,
     54		(sha512_block_fn *)sha512_block_data_order_neon);
     55	kernel_neon_end();
     56
     57	return sha512_base_finish(desc, out);
     58}
     59
     60static int sha512_neon_final(struct shash_desc *desc, u8 *out)
     61{
     62	return sha512_neon_finup(desc, NULL, 0, out);
     63}
     64
     65struct shash_alg sha512_neon_algs[] = { {
     66	.init			= sha384_base_init,
     67	.update			= sha512_neon_update,
     68	.final			= sha512_neon_final,
     69	.finup			= sha512_neon_finup,
     70	.descsize		= sizeof(struct sha512_state),
     71	.digestsize		= SHA384_DIGEST_SIZE,
     72	.base			= {
     73		.cra_name		= "sha384",
     74		.cra_driver_name	= "sha384-neon",
     75		.cra_priority		= 300,
     76		.cra_blocksize		= SHA384_BLOCK_SIZE,
     77		.cra_module		= THIS_MODULE,
     78
     79	}
     80},  {
     81	.init			= sha512_base_init,
     82	.update			= sha512_neon_update,
     83	.final			= sha512_neon_final,
     84	.finup			= sha512_neon_finup,
     85	.descsize		= sizeof(struct sha512_state),
     86	.digestsize		= SHA512_DIGEST_SIZE,
     87	.base			= {
     88		.cra_name		= "sha512",
     89		.cra_driver_name	= "sha512-neon",
     90		.cra_priority		= 300,
     91		.cra_blocksize		= SHA512_BLOCK_SIZE,
     92		.cra_module		= THIS_MODULE,
     93	}
     94} };