mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-27 18:15:04 +07:00
e50944e219
Many shash algorithms set .cra_flags = CRYPTO_ALG_TYPE_SHASH. But this
is redundant with the C structure type ('struct shash_alg'), and
crypto_register_shash() already sets the type flag automatically,
clearing any type flag that was already there. Apparently the useless
assignment has just been copy+pasted around.
So, remove the useless assignment from all the shash algorithms.
This patch shouldn't change any actual behavior.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
350 lines
9.0 KiB
C
350 lines
9.0 KiB
C
/*
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* Cryptographic API.
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*
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* Glue code for the SHA512 Secure Hash Algorithm assembler
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* implementation using supplemental SSE3 / AVX / AVX2 instructions.
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*
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* This file is based on sha512_generic.c
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*
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* Copyright (C) 2013 Intel Corporation
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* Author: Tim Chen <tim.c.chen@linux.intel.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <crypto/internal/hash.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/mm.h>
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#include <linux/cryptohash.h>
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#include <linux/types.h>
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#include <crypto/sha.h>
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#include <crypto/sha512_base.h>
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#include <asm/fpu/api.h>
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#include <linux/string.h>
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asmlinkage void sha512_transform_ssse3(u64 *digest, const char *data,
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u64 rounds);
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typedef void (sha512_transform_fn)(u64 *digest, const char *data, u64 rounds);
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static int sha512_update(struct shash_desc *desc, const u8 *data,
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unsigned int len, sha512_transform_fn *sha512_xform)
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{
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struct sha512_state *sctx = shash_desc_ctx(desc);
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if (!irq_fpu_usable() ||
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(sctx->count[0] % SHA512_BLOCK_SIZE) + len < SHA512_BLOCK_SIZE)
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return crypto_sha512_update(desc, data, len);
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/* make sure casting to sha512_block_fn() is safe */
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BUILD_BUG_ON(offsetof(struct sha512_state, state) != 0);
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kernel_fpu_begin();
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sha512_base_do_update(desc, data, len,
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(sha512_block_fn *)sha512_xform);
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kernel_fpu_end();
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return 0;
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}
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static int sha512_finup(struct shash_desc *desc, const u8 *data,
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unsigned int len, u8 *out, sha512_transform_fn *sha512_xform)
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{
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if (!irq_fpu_usable())
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return crypto_sha512_finup(desc, data, len, out);
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kernel_fpu_begin();
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if (len)
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sha512_base_do_update(desc, data, len,
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(sha512_block_fn *)sha512_xform);
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sha512_base_do_finalize(desc, (sha512_block_fn *)sha512_xform);
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kernel_fpu_end();
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return sha512_base_finish(desc, out);
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}
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static int sha512_ssse3_update(struct shash_desc *desc, const u8 *data,
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unsigned int len)
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{
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return sha512_update(desc, data, len, sha512_transform_ssse3);
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}
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static int sha512_ssse3_finup(struct shash_desc *desc, const u8 *data,
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unsigned int len, u8 *out)
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{
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return sha512_finup(desc, data, len, out, sha512_transform_ssse3);
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}
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/* Add padding and return the message digest. */
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static int sha512_ssse3_final(struct shash_desc *desc, u8 *out)
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{
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return sha512_ssse3_finup(desc, NULL, 0, out);
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}
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static struct shash_alg sha512_ssse3_algs[] = { {
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.digestsize = SHA512_DIGEST_SIZE,
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.init = sha512_base_init,
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.update = sha512_ssse3_update,
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.final = sha512_ssse3_final,
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.finup = sha512_ssse3_finup,
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.descsize = sizeof(struct sha512_state),
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.base = {
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.cra_name = "sha512",
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.cra_driver_name = "sha512-ssse3",
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.cra_priority = 150,
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.cra_blocksize = SHA512_BLOCK_SIZE,
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.cra_module = THIS_MODULE,
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}
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}, {
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.digestsize = SHA384_DIGEST_SIZE,
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.init = sha384_base_init,
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.update = sha512_ssse3_update,
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.final = sha512_ssse3_final,
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.finup = sha512_ssse3_finup,
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.descsize = sizeof(struct sha512_state),
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.base = {
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.cra_name = "sha384",
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.cra_driver_name = "sha384-ssse3",
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.cra_priority = 150,
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.cra_blocksize = SHA384_BLOCK_SIZE,
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.cra_module = THIS_MODULE,
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}
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} };
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static int register_sha512_ssse3(void)
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{
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if (boot_cpu_has(X86_FEATURE_SSSE3))
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return crypto_register_shashes(sha512_ssse3_algs,
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ARRAY_SIZE(sha512_ssse3_algs));
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return 0;
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}
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static void unregister_sha512_ssse3(void)
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{
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if (boot_cpu_has(X86_FEATURE_SSSE3))
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crypto_unregister_shashes(sha512_ssse3_algs,
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ARRAY_SIZE(sha512_ssse3_algs));
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}
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#ifdef CONFIG_AS_AVX
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asmlinkage void sha512_transform_avx(u64 *digest, const char *data,
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u64 rounds);
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static bool avx_usable(void)
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{
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if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM, NULL)) {
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if (boot_cpu_has(X86_FEATURE_AVX))
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pr_info("AVX detected but unusable.\n");
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return false;
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}
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return true;
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}
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static int sha512_avx_update(struct shash_desc *desc, const u8 *data,
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unsigned int len)
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{
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return sha512_update(desc, data, len, sha512_transform_avx);
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}
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static int sha512_avx_finup(struct shash_desc *desc, const u8 *data,
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unsigned int len, u8 *out)
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{
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return sha512_finup(desc, data, len, out, sha512_transform_avx);
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}
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/* Add padding and return the message digest. */
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static int sha512_avx_final(struct shash_desc *desc, u8 *out)
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{
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return sha512_avx_finup(desc, NULL, 0, out);
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}
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static struct shash_alg sha512_avx_algs[] = { {
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.digestsize = SHA512_DIGEST_SIZE,
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.init = sha512_base_init,
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.update = sha512_avx_update,
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.final = sha512_avx_final,
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.finup = sha512_avx_finup,
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.descsize = sizeof(struct sha512_state),
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.base = {
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.cra_name = "sha512",
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.cra_driver_name = "sha512-avx",
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.cra_priority = 160,
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.cra_blocksize = SHA512_BLOCK_SIZE,
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.cra_module = THIS_MODULE,
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}
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}, {
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.digestsize = SHA384_DIGEST_SIZE,
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.init = sha384_base_init,
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.update = sha512_avx_update,
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.final = sha512_avx_final,
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.finup = sha512_avx_finup,
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.descsize = sizeof(struct sha512_state),
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.base = {
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.cra_name = "sha384",
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.cra_driver_name = "sha384-avx",
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.cra_priority = 160,
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.cra_blocksize = SHA384_BLOCK_SIZE,
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.cra_module = THIS_MODULE,
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}
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} };
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static int register_sha512_avx(void)
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{
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if (avx_usable())
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return crypto_register_shashes(sha512_avx_algs,
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ARRAY_SIZE(sha512_avx_algs));
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return 0;
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}
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static void unregister_sha512_avx(void)
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{
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if (avx_usable())
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crypto_unregister_shashes(sha512_avx_algs,
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ARRAY_SIZE(sha512_avx_algs));
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}
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#else
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static inline int register_sha512_avx(void) { return 0; }
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static inline void unregister_sha512_avx(void) { }
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#endif
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#if defined(CONFIG_AS_AVX2) && defined(CONFIG_AS_AVX)
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asmlinkage void sha512_transform_rorx(u64 *digest, const char *data,
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u64 rounds);
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static int sha512_avx2_update(struct shash_desc *desc, const u8 *data,
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unsigned int len)
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{
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return sha512_update(desc, data, len, sha512_transform_rorx);
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}
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static int sha512_avx2_finup(struct shash_desc *desc, const u8 *data,
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unsigned int len, u8 *out)
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{
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return sha512_finup(desc, data, len, out, sha512_transform_rorx);
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}
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/* Add padding and return the message digest. */
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static int sha512_avx2_final(struct shash_desc *desc, u8 *out)
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{
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return sha512_avx2_finup(desc, NULL, 0, out);
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}
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static struct shash_alg sha512_avx2_algs[] = { {
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.digestsize = SHA512_DIGEST_SIZE,
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.init = sha512_base_init,
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.update = sha512_avx2_update,
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.final = sha512_avx2_final,
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.finup = sha512_avx2_finup,
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.descsize = sizeof(struct sha512_state),
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.base = {
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.cra_name = "sha512",
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.cra_driver_name = "sha512-avx2",
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.cra_priority = 170,
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.cra_blocksize = SHA512_BLOCK_SIZE,
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.cra_module = THIS_MODULE,
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}
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}, {
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.digestsize = SHA384_DIGEST_SIZE,
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.init = sha384_base_init,
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.update = sha512_avx2_update,
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.final = sha512_avx2_final,
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.finup = sha512_avx2_finup,
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.descsize = sizeof(struct sha512_state),
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.base = {
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.cra_name = "sha384",
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.cra_driver_name = "sha384-avx2",
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.cra_priority = 170,
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.cra_blocksize = SHA384_BLOCK_SIZE,
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.cra_module = THIS_MODULE,
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}
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} };
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static bool avx2_usable(void)
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{
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if (avx_usable() && boot_cpu_has(X86_FEATURE_AVX2) &&
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boot_cpu_has(X86_FEATURE_BMI2))
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return true;
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return false;
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}
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static int register_sha512_avx2(void)
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{
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if (avx2_usable())
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return crypto_register_shashes(sha512_avx2_algs,
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ARRAY_SIZE(sha512_avx2_algs));
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return 0;
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}
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static void unregister_sha512_avx2(void)
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{
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if (avx2_usable())
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crypto_unregister_shashes(sha512_avx2_algs,
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ARRAY_SIZE(sha512_avx2_algs));
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}
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#else
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static inline int register_sha512_avx2(void) { return 0; }
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static inline void unregister_sha512_avx2(void) { }
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#endif
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static int __init sha512_ssse3_mod_init(void)
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{
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if (register_sha512_ssse3())
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goto fail;
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if (register_sha512_avx()) {
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unregister_sha512_ssse3();
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goto fail;
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}
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if (register_sha512_avx2()) {
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unregister_sha512_avx();
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unregister_sha512_ssse3();
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goto fail;
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}
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return 0;
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fail:
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return -ENODEV;
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}
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static void __exit sha512_ssse3_mod_fini(void)
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{
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unregister_sha512_avx2();
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unregister_sha512_avx();
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unregister_sha512_ssse3();
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}
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module_init(sha512_ssse3_mod_init);
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module_exit(sha512_ssse3_mod_fini);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("SHA512 Secure Hash Algorithm, Supplemental SSE3 accelerated");
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MODULE_ALIAS_CRYPTO("sha512");
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MODULE_ALIAS_CRYPTO("sha512-ssse3");
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MODULE_ALIAS_CRYPTO("sha512-avx");
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MODULE_ALIAS_CRYPTO("sha512-avx2");
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MODULE_ALIAS_CRYPTO("sha384");
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MODULE_ALIAS_CRYPTO("sha384-ssse3");
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MODULE_ALIAS_CRYPTO("sha384-avx");
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MODULE_ALIAS_CRYPTO("sha384-avx2");
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