diff options
Diffstat (limited to 'arch/x86/crypto/serpent_avx2_glue.c')
| -rw-r--r-- | arch/x86/crypto/serpent_avx2_glue.c | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/arch/x86/crypto/serpent_avx2_glue.c b/arch/x86/crypto/serpent_avx2_glue.c new file mode 100644 index 000000000..347e97f4b --- /dev/null +++ b/arch/x86/crypto/serpent_avx2_glue.c @@ -0,0 +1,130 @@ +// 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"); |