linux/arch/x86/crypto/serpent_avx2_glue.c
Randy Dunlap f16a005cde crypto: x86 - eliminate anonymous module_init & module_exit
Eliminate anonymous module_init() and module_exit(), which can lead to
confusion or ambiguity when reading System.map, crashes/oops/bugs,
or an initcall_debug log.

Give each of these init and exit functions unique driver-specific
names to eliminate the anonymous names.

Example 1: (System.map)
 ffffffff832fc78c t init
 ffffffff832fc79e t init
 ffffffff832fc8f8 t init

Example 2: (initcall_debug log)
 calling  init+0x0/0x12 @ 1
 initcall init+0x0/0x12 returned 0 after 15 usecs
 calling  init+0x0/0x60 @ 1
 initcall init+0x0/0x60 returned 0 after 2 usecs
 calling  init+0x0/0x9a @ 1
 initcall init+0x0/0x9a returned 0 after 74 usecs

Fixes: 64b94ceae8 ("crypto: blowfish - add x86_64 assembly implementation")
Fixes: 676a38046f ("crypto: camellia-x86_64 - module init/exit functions should be static")
Fixes: 0b95ec56ae ("crypto: camellia - add assembler implementation for x86_64")
Fixes: 56d76c96a9 ("crypto: serpent - add AVX2/x86_64 assembler implementation of serpent cipher")
Fixes: b9f535ffe3 ("[CRYPTO] twofish: i586 assembly version")
Fixes: ff0a70fe05 ("crypto: twofish-x86_64-3way - module init/exit functions should be static")
Fixes: 8280daad43 ("crypto: twofish - add 3-way parallel x86_64 assembler implemention")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Cc: Joachim Fritschi <jfritschi@freenet.de>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: linux-crypto@vger.kernel.org
Cc: x86@kernel.org
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2022-04-08 16:13:31 +08:00

131 lines
3.9 KiB
C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Glue Code for x86_64/AVX2 assembler optimized version of Serpent
*
* Copyright © 2012-2013 Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/crypto.h>
#include <linux/err.h>
#include <crypto/algapi.h>
#include <crypto/internal/simd.h>
#include <crypto/serpent.h>
#include "serpent-avx.h"
#include "ecb_cbc_helpers.h"
#define SERPENT_AVX2_PARALLEL_BLOCKS 16
/* 16-way AVX2 parallel cipher functions */
asmlinkage void serpent_ecb_enc_16way(const void *ctx, u8 *dst, const u8 *src);
asmlinkage void serpent_ecb_dec_16way(const void *ctx, u8 *dst, const u8 *src);
asmlinkage void serpent_cbc_dec_16way(const void *ctx, u8 *dst, const u8 *src);
static int serpent_setkey_skcipher(struct crypto_skcipher *tfm,
const u8 *key, unsigned int keylen)
{
return __serpent_setkey(crypto_skcipher_ctx(tfm), key, keylen);
}
static int ecb_encrypt(struct skcipher_request *req)
{
ECB_WALK_START(req, SERPENT_BLOCK_SIZE, SERPENT_PARALLEL_BLOCKS);
ECB_BLOCK(SERPENT_AVX2_PARALLEL_BLOCKS, serpent_ecb_enc_16way);
ECB_BLOCK(SERPENT_PARALLEL_BLOCKS, serpent_ecb_enc_8way_avx);
ECB_BLOCK(1, __serpent_encrypt);
ECB_WALK_END();
}
static int ecb_decrypt(struct skcipher_request *req)
{
ECB_WALK_START(req, SERPENT_BLOCK_SIZE, SERPENT_PARALLEL_BLOCKS);
ECB_BLOCK(SERPENT_AVX2_PARALLEL_BLOCKS, serpent_ecb_dec_16way);
ECB_BLOCK(SERPENT_PARALLEL_BLOCKS, serpent_ecb_dec_8way_avx);
ECB_BLOCK(1, __serpent_decrypt);
ECB_WALK_END();
}
static int cbc_encrypt(struct skcipher_request *req)
{
CBC_WALK_START(req, SERPENT_BLOCK_SIZE, -1);
CBC_ENC_BLOCK(__serpent_encrypt);
CBC_WALK_END();
}
static int cbc_decrypt(struct skcipher_request *req)
{
CBC_WALK_START(req, SERPENT_BLOCK_SIZE, SERPENT_PARALLEL_BLOCKS);
CBC_DEC_BLOCK(SERPENT_AVX2_PARALLEL_BLOCKS, serpent_cbc_dec_16way);
CBC_DEC_BLOCK(SERPENT_PARALLEL_BLOCKS, serpent_cbc_dec_8way_avx);
CBC_DEC_BLOCK(1, __serpent_decrypt);
CBC_WALK_END();
}
static struct skcipher_alg serpent_algs[] = {
{
.base.cra_name = "__ecb(serpent)",
.base.cra_driver_name = "__ecb-serpent-avx2",
.base.cra_priority = 600,
.base.cra_flags = CRYPTO_ALG_INTERNAL,
.base.cra_blocksize = SERPENT_BLOCK_SIZE,
.base.cra_ctxsize = sizeof(struct serpent_ctx),
.base.cra_module = THIS_MODULE,
.min_keysize = SERPENT_MIN_KEY_SIZE,
.max_keysize = SERPENT_MAX_KEY_SIZE,
.setkey = serpent_setkey_skcipher,
.encrypt = ecb_encrypt,
.decrypt = ecb_decrypt,
}, {
.base.cra_name = "__cbc(serpent)",
.base.cra_driver_name = "__cbc-serpent-avx2",
.base.cra_priority = 600,
.base.cra_flags = CRYPTO_ALG_INTERNAL,
.base.cra_blocksize = SERPENT_BLOCK_SIZE,
.base.cra_ctxsize = sizeof(struct serpent_ctx),
.base.cra_module = THIS_MODULE,
.min_keysize = SERPENT_MIN_KEY_SIZE,
.max_keysize = SERPENT_MAX_KEY_SIZE,
.ivsize = SERPENT_BLOCK_SIZE,
.setkey = serpent_setkey_skcipher,
.encrypt = cbc_encrypt,
.decrypt = cbc_decrypt,
},
};
static struct simd_skcipher_alg *serpent_simd_algs[ARRAY_SIZE(serpent_algs)];
static int __init serpent_avx2_init(void)
{
const char *feature_name;
if (!boot_cpu_has(X86_FEATURE_AVX2) || !boot_cpu_has(X86_FEATURE_OSXSAVE)) {
pr_info("AVX2 instructions are not detected.\n");
return -ENODEV;
}
if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM,
&feature_name)) {
pr_info("CPU feature '%s' is not supported.\n", feature_name);
return -ENODEV;
}
return simd_register_skciphers_compat(serpent_algs,
ARRAY_SIZE(serpent_algs),
serpent_simd_algs);
}
static void __exit serpent_avx2_fini(void)
{
simd_unregister_skciphers(serpent_algs, ARRAY_SIZE(serpent_algs),
serpent_simd_algs);
}
module_init(serpent_avx2_init);
module_exit(serpent_avx2_fini);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Serpent Cipher Algorithm, AVX2 optimized");
MODULE_ALIAS_CRYPTO("serpent");
MODULE_ALIAS_CRYPTO("serpent-asm");