| /* |
| * Glue Code for x86_64/AVX2 assembler optimized version of Serpent |
| * |
| * Copyright © 2012-2013 Jussi Kivilinna <jussi.kivilinna@mbnet.fi> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/types.h> |
| #include <linux/crypto.h> |
| #include <linux/err.h> |
| #include <crypto/ablk_helper.h> |
| #include <crypto/algapi.h> |
| #include <crypto/ctr.h> |
| #include <crypto/lrw.h> |
| #include <crypto/xts.h> |
| #include <crypto/serpent.h> |
| #include <asm/xcr.h> |
| #include <asm/xsave.h> |
| #include <asm/crypto/serpent-avx.h> |
| #include <asm/crypto/glue_helper.h> |
| |
| #define SERPENT_AVX2_PARALLEL_BLOCKS 16 |
| |
| /* 16-way AVX2 parallel cipher functions */ |
| asmlinkage void serpent_ecb_enc_16way(struct serpent_ctx *ctx, u8 *dst, |
| const u8 *src); |
| asmlinkage void serpent_ecb_dec_16way(struct serpent_ctx *ctx, u8 *dst, |
| const u8 *src); |
| asmlinkage void serpent_cbc_dec_16way(void *ctx, u128 *dst, const u128 *src); |
| |
| asmlinkage void serpent_ctr_16way(void *ctx, u128 *dst, const u128 *src, |
| le128 *iv); |
| asmlinkage void serpent_xts_enc_16way(struct serpent_ctx *ctx, u8 *dst, |
| const u8 *src, le128 *iv); |
| asmlinkage void serpent_xts_dec_16way(struct serpent_ctx *ctx, u8 *dst, |
| const u8 *src, le128 *iv); |
| |
| static const struct common_glue_ctx serpent_enc = { |
| .num_funcs = 3, |
| .fpu_blocks_limit = 8, |
| |
| .funcs = { { |
| .num_blocks = 16, |
| .fn_u = { .ecb = GLUE_FUNC_CAST(serpent_ecb_enc_16way) } |
| }, { |
| .num_blocks = 8, |
| .fn_u = { .ecb = GLUE_FUNC_CAST(serpent_ecb_enc_8way_avx) } |
| }, { |
| .num_blocks = 1, |
| .fn_u = { .ecb = GLUE_FUNC_CAST(__serpent_encrypt) } |
| } } |
| }; |
| |
| static const struct common_glue_ctx serpent_ctr = { |
| .num_funcs = 3, |
| .fpu_blocks_limit = 8, |
| |
| .funcs = { { |
| .num_blocks = 16, |
| .fn_u = { .ctr = GLUE_CTR_FUNC_CAST(serpent_ctr_16way) } |
| }, { |
| .num_blocks = 8, |
| .fn_u = { .ctr = GLUE_CTR_FUNC_CAST(serpent_ctr_8way_avx) } |
| }, { |
| .num_blocks = 1, |
| .fn_u = { .ctr = GLUE_CTR_FUNC_CAST(__serpent_crypt_ctr) } |
| } } |
| }; |
| |
| static const struct common_glue_ctx serpent_enc_xts = { |
| .num_funcs = 3, |
| .fpu_blocks_limit = 8, |
| |
| .funcs = { { |
| .num_blocks = 16, |
| .fn_u = { .xts = GLUE_XTS_FUNC_CAST(serpent_xts_enc_16way) } |
| }, { |
| .num_blocks = 8, |
| .fn_u = { .xts = GLUE_XTS_FUNC_CAST(serpent_xts_enc_8way_avx) } |
| }, { |
| .num_blocks = 1, |
| .fn_u = { .xts = GLUE_XTS_FUNC_CAST(serpent_xts_enc) } |
| } } |
| }; |
| |
| static const struct common_glue_ctx serpent_dec = { |
| .num_funcs = 3, |
| .fpu_blocks_limit = 8, |
| |
| .funcs = { { |
| .num_blocks = 16, |
| .fn_u = { .ecb = GLUE_FUNC_CAST(serpent_ecb_dec_16way) } |
| }, { |
| .num_blocks = 8, |
| .fn_u = { .ecb = GLUE_FUNC_CAST(serpent_ecb_dec_8way_avx) } |
| }, { |
| .num_blocks = 1, |
| .fn_u = { .ecb = GLUE_FUNC_CAST(__serpent_decrypt) } |
| } } |
| }; |
| |
| static const struct common_glue_ctx serpent_dec_cbc = { |
| .num_funcs = 3, |
| .fpu_blocks_limit = 8, |
| |
| .funcs = { { |
| .num_blocks = 16, |
| .fn_u = { .cbc = GLUE_CBC_FUNC_CAST(serpent_cbc_dec_16way) } |
| }, { |
| .num_blocks = 8, |
| .fn_u = { .cbc = GLUE_CBC_FUNC_CAST(serpent_cbc_dec_8way_avx) } |
| }, { |
| .num_blocks = 1, |
| .fn_u = { .cbc = GLUE_CBC_FUNC_CAST(__serpent_decrypt) } |
| } } |
| }; |
| |
| static const struct common_glue_ctx serpent_dec_xts = { |
| .num_funcs = 3, |
| .fpu_blocks_limit = 8, |
| |
| .funcs = { { |
| .num_blocks = 16, |
| .fn_u = { .xts = GLUE_XTS_FUNC_CAST(serpent_xts_dec_16way) } |
| }, { |
| .num_blocks = 8, |
| .fn_u = { .xts = GLUE_XTS_FUNC_CAST(serpent_xts_dec_8way_avx) } |
| }, { |
| .num_blocks = 1, |
| .fn_u = { .xts = GLUE_XTS_FUNC_CAST(serpent_xts_dec) } |
| } } |
| }; |
| |
| static int ecb_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| struct scatterlist *src, unsigned int nbytes) |
| { |
| return glue_ecb_crypt_128bit(&serpent_enc, desc, dst, src, nbytes); |
| } |
| |
| static int ecb_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| struct scatterlist *src, unsigned int nbytes) |
| { |
| return glue_ecb_crypt_128bit(&serpent_dec, desc, dst, src, nbytes); |
| } |
| |
| static int cbc_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| struct scatterlist *src, unsigned int nbytes) |
| { |
| return glue_cbc_encrypt_128bit(GLUE_FUNC_CAST(__serpent_encrypt), desc, |
| dst, src, nbytes); |
| } |
| |
| static int cbc_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| struct scatterlist *src, unsigned int nbytes) |
| { |
| return glue_cbc_decrypt_128bit(&serpent_dec_cbc, desc, dst, src, |
| nbytes); |
| } |
| |
| static int ctr_crypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| struct scatterlist *src, unsigned int nbytes) |
| { |
| return glue_ctr_crypt_128bit(&serpent_ctr, desc, dst, src, nbytes); |
| } |
| |
| static inline bool serpent_fpu_begin(bool fpu_enabled, unsigned int nbytes) |
| { |
| /* since reusing AVX functions, starts using FPU at 8 parallel blocks */ |
| return glue_fpu_begin(SERPENT_BLOCK_SIZE, 8, NULL, fpu_enabled, nbytes); |
| } |
| |
| static inline void serpent_fpu_end(bool fpu_enabled) |
| { |
| glue_fpu_end(fpu_enabled); |
| } |
| |
| struct crypt_priv { |
| struct serpent_ctx *ctx; |
| bool fpu_enabled; |
| }; |
| |
| static void encrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes) |
| { |
| const unsigned int bsize = SERPENT_BLOCK_SIZE; |
| struct crypt_priv *ctx = priv; |
| int i; |
| |
| ctx->fpu_enabled = serpent_fpu_begin(ctx->fpu_enabled, nbytes); |
| |
| if (nbytes >= SERPENT_AVX2_PARALLEL_BLOCKS * bsize) { |
| serpent_ecb_enc_16way(ctx->ctx, srcdst, srcdst); |
| srcdst += bsize * SERPENT_AVX2_PARALLEL_BLOCKS; |
| nbytes -= bsize * SERPENT_AVX2_PARALLEL_BLOCKS; |
| } |
| |
| while (nbytes >= SERPENT_PARALLEL_BLOCKS * bsize) { |
| serpent_ecb_enc_8way_avx(ctx->ctx, srcdst, srcdst); |
| srcdst += bsize * SERPENT_PARALLEL_BLOCKS; |
| nbytes -= bsize * SERPENT_PARALLEL_BLOCKS; |
| } |
| |
| for (i = 0; i < nbytes / bsize; i++, srcdst += bsize) |
| __serpent_encrypt(ctx->ctx, srcdst, srcdst); |
| } |
| |
| static void decrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes) |
| { |
| const unsigned int bsize = SERPENT_BLOCK_SIZE; |
| struct crypt_priv *ctx = priv; |
| int i; |
| |
| ctx->fpu_enabled = serpent_fpu_begin(ctx->fpu_enabled, nbytes); |
| |
| if (nbytes >= SERPENT_AVX2_PARALLEL_BLOCKS * bsize) { |
| serpent_ecb_dec_16way(ctx->ctx, srcdst, srcdst); |
| srcdst += bsize * SERPENT_AVX2_PARALLEL_BLOCKS; |
| nbytes -= bsize * SERPENT_AVX2_PARALLEL_BLOCKS; |
| } |
| |
| while (nbytes >= SERPENT_PARALLEL_BLOCKS * bsize) { |
| serpent_ecb_dec_8way_avx(ctx->ctx, srcdst, srcdst); |
| srcdst += bsize * SERPENT_PARALLEL_BLOCKS; |
| nbytes -= bsize * SERPENT_PARALLEL_BLOCKS; |
| } |
| |
| for (i = 0; i < nbytes / bsize; i++, srcdst += bsize) |
| __serpent_decrypt(ctx->ctx, srcdst, srcdst); |
| } |
| |
| static int lrw_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| struct scatterlist *src, unsigned int nbytes) |
| { |
| struct serpent_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| be128 buf[SERPENT_AVX2_PARALLEL_BLOCKS]; |
| struct crypt_priv crypt_ctx = { |
| .ctx = &ctx->serpent_ctx, |
| .fpu_enabled = false, |
| }; |
| struct lrw_crypt_req req = { |
| .tbuf = buf, |
| .tbuflen = sizeof(buf), |
| |
| .table_ctx = &ctx->lrw_table, |
| .crypt_ctx = &crypt_ctx, |
| .crypt_fn = encrypt_callback, |
| }; |
| int ret; |
| |
| desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; |
| ret = lrw_crypt(desc, dst, src, nbytes, &req); |
| serpent_fpu_end(crypt_ctx.fpu_enabled); |
| |
| return ret; |
| } |
| |
| static int lrw_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| struct scatterlist *src, unsigned int nbytes) |
| { |
| struct serpent_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| be128 buf[SERPENT_AVX2_PARALLEL_BLOCKS]; |
| struct crypt_priv crypt_ctx = { |
| .ctx = &ctx->serpent_ctx, |
| .fpu_enabled = false, |
| }; |
| struct lrw_crypt_req req = { |
| .tbuf = buf, |
| .tbuflen = sizeof(buf), |
| |
| .table_ctx = &ctx->lrw_table, |
| .crypt_ctx = &crypt_ctx, |
| .crypt_fn = decrypt_callback, |
| }; |
| int ret; |
| |
| desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; |
| ret = lrw_crypt(desc, dst, src, nbytes, &req); |
| serpent_fpu_end(crypt_ctx.fpu_enabled); |
| |
| return ret; |
| } |
| |
| static int xts_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| struct scatterlist *src, unsigned int nbytes) |
| { |
| struct serpent_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| |
| return glue_xts_crypt_128bit(&serpent_enc_xts, desc, dst, src, nbytes, |
| XTS_TWEAK_CAST(__serpent_encrypt), |
| &ctx->tweak_ctx, &ctx->crypt_ctx); |
| } |
| |
| static int xts_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| struct scatterlist *src, unsigned int nbytes) |
| { |
| struct serpent_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| |
| return glue_xts_crypt_128bit(&serpent_dec_xts, desc, dst, src, nbytes, |
| XTS_TWEAK_CAST(__serpent_encrypt), |
| &ctx->tweak_ctx, &ctx->crypt_ctx); |
| } |
| |
| static struct crypto_alg srp_algs[10] = { { |
| .cra_name = "__ecb-serpent-avx2", |
| .cra_driver_name = "__driver-ecb-serpent-avx2", |
| .cra_priority = 0, |
| .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | |
| CRYPTO_ALG_INTERNAL, |
| .cra_blocksize = SERPENT_BLOCK_SIZE, |
| .cra_ctxsize = sizeof(struct serpent_ctx), |
| .cra_alignmask = 0, |
| .cra_type = &crypto_blkcipher_type, |
| .cra_module = THIS_MODULE, |
| .cra_list = LIST_HEAD_INIT(srp_algs[0].cra_list), |
| .cra_u = { |
| .blkcipher = { |
| .min_keysize = SERPENT_MIN_KEY_SIZE, |
| .max_keysize = SERPENT_MAX_KEY_SIZE, |
| .setkey = serpent_setkey, |
| .encrypt = ecb_encrypt, |
| .decrypt = ecb_decrypt, |
| }, |
| }, |
| }, { |
| .cra_name = "__cbc-serpent-avx2", |
| .cra_driver_name = "__driver-cbc-serpent-avx2", |
| .cra_priority = 0, |
| .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | |
| CRYPTO_ALG_INTERNAL, |
| .cra_blocksize = SERPENT_BLOCK_SIZE, |
| .cra_ctxsize = sizeof(struct serpent_ctx), |
| .cra_alignmask = 0, |
| .cra_type = &crypto_blkcipher_type, |
| .cra_module = THIS_MODULE, |
| .cra_list = LIST_HEAD_INIT(srp_algs[1].cra_list), |
| .cra_u = { |
| .blkcipher = { |
| .min_keysize = SERPENT_MIN_KEY_SIZE, |
| .max_keysize = SERPENT_MAX_KEY_SIZE, |
| .setkey = serpent_setkey, |
| .encrypt = cbc_encrypt, |
| .decrypt = cbc_decrypt, |
| }, |
| }, |
| }, { |
| .cra_name = "__ctr-serpent-avx2", |
| .cra_driver_name = "__driver-ctr-serpent-avx2", |
| .cra_priority = 0, |
| .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | |
| CRYPTO_ALG_INTERNAL, |
| .cra_blocksize = 1, |
| .cra_ctxsize = sizeof(struct serpent_ctx), |
| .cra_alignmask = 0, |
| .cra_type = &crypto_blkcipher_type, |
| .cra_module = THIS_MODULE, |
| .cra_list = LIST_HEAD_INIT(srp_algs[2].cra_list), |
| .cra_u = { |
| .blkcipher = { |
| .min_keysize = SERPENT_MIN_KEY_SIZE, |
| .max_keysize = SERPENT_MAX_KEY_SIZE, |
| .ivsize = SERPENT_BLOCK_SIZE, |
| .setkey = serpent_setkey, |
| .encrypt = ctr_crypt, |
| .decrypt = ctr_crypt, |
| }, |
| }, |
| }, { |
| .cra_name = "__lrw-serpent-avx2", |
| .cra_driver_name = "__driver-lrw-serpent-avx2", |
| .cra_priority = 0, |
| .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | |
| CRYPTO_ALG_INTERNAL, |
| .cra_blocksize = SERPENT_BLOCK_SIZE, |
| .cra_ctxsize = sizeof(struct serpent_lrw_ctx), |
| .cra_alignmask = 0, |
| .cra_type = &crypto_blkcipher_type, |
| .cra_module = THIS_MODULE, |
| .cra_list = LIST_HEAD_INIT(srp_algs[3].cra_list), |
| .cra_exit = lrw_serpent_exit_tfm, |
| .cra_u = { |
| .blkcipher = { |
| .min_keysize = SERPENT_MIN_KEY_SIZE + |
| SERPENT_BLOCK_SIZE, |
| .max_keysize = SERPENT_MAX_KEY_SIZE + |
| SERPENT_BLOCK_SIZE, |
| .ivsize = SERPENT_BLOCK_SIZE, |
| .setkey = lrw_serpent_setkey, |
| .encrypt = lrw_encrypt, |
| .decrypt = lrw_decrypt, |
| }, |
| }, |
| }, { |
| .cra_name = "__xts-serpent-avx2", |
| .cra_driver_name = "__driver-xts-serpent-avx2", |
| .cra_priority = 0, |
| .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | |
| CRYPTO_ALG_INTERNAL, |
| .cra_blocksize = SERPENT_BLOCK_SIZE, |
| .cra_ctxsize = sizeof(struct serpent_xts_ctx), |
| .cra_alignmask = 0, |
| .cra_type = &crypto_blkcipher_type, |
| .cra_module = THIS_MODULE, |
| .cra_list = LIST_HEAD_INIT(srp_algs[4].cra_list), |
| .cra_u = { |
| .blkcipher = { |
| .min_keysize = SERPENT_MIN_KEY_SIZE * 2, |
| .max_keysize = SERPENT_MAX_KEY_SIZE * 2, |
| .ivsize = SERPENT_BLOCK_SIZE, |
| .setkey = xts_serpent_setkey, |
| .encrypt = xts_encrypt, |
| .decrypt = xts_decrypt, |
| }, |
| }, |
| }, { |
| .cra_name = "ecb(serpent)", |
| .cra_driver_name = "ecb-serpent-avx2", |
| .cra_priority = 600, |
| .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
| .cra_blocksize = SERPENT_BLOCK_SIZE, |
| .cra_ctxsize = sizeof(struct async_helper_ctx), |
| .cra_alignmask = 0, |
| .cra_type = &crypto_ablkcipher_type, |
| .cra_module = THIS_MODULE, |
| .cra_list = LIST_HEAD_INIT(srp_algs[5].cra_list), |
| .cra_init = ablk_init, |
| .cra_exit = ablk_exit, |
| .cra_u = { |
| .ablkcipher = { |
| .min_keysize = SERPENT_MIN_KEY_SIZE, |
| .max_keysize = SERPENT_MAX_KEY_SIZE, |
| .setkey = ablk_set_key, |
| .encrypt = ablk_encrypt, |
| .decrypt = ablk_decrypt, |
| }, |
| }, |
| }, { |
| .cra_name = "cbc(serpent)", |
| .cra_driver_name = "cbc-serpent-avx2", |
| .cra_priority = 600, |
| .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
| .cra_blocksize = SERPENT_BLOCK_SIZE, |
| .cra_ctxsize = sizeof(struct async_helper_ctx), |
| .cra_alignmask = 0, |
| .cra_type = &crypto_ablkcipher_type, |
| .cra_module = THIS_MODULE, |
| .cra_list = LIST_HEAD_INIT(srp_algs[6].cra_list), |
| .cra_init = ablk_init, |
| .cra_exit = ablk_exit, |
| .cra_u = { |
| .ablkcipher = { |
| .min_keysize = SERPENT_MIN_KEY_SIZE, |
| .max_keysize = SERPENT_MAX_KEY_SIZE, |
| .ivsize = SERPENT_BLOCK_SIZE, |
| .setkey = ablk_set_key, |
| .encrypt = __ablk_encrypt, |
| .decrypt = ablk_decrypt, |
| }, |
| }, |
| }, { |
| .cra_name = "ctr(serpent)", |
| .cra_driver_name = "ctr-serpent-avx2", |
| .cra_priority = 600, |
| .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
| .cra_blocksize = 1, |
| .cra_ctxsize = sizeof(struct async_helper_ctx), |
| .cra_alignmask = 0, |
| .cra_type = &crypto_ablkcipher_type, |
| .cra_module = THIS_MODULE, |
| .cra_list = LIST_HEAD_INIT(srp_algs[7].cra_list), |
| .cra_init = ablk_init, |
| .cra_exit = ablk_exit, |
| .cra_u = { |
| .ablkcipher = { |
| .min_keysize = SERPENT_MIN_KEY_SIZE, |
| .max_keysize = SERPENT_MAX_KEY_SIZE, |
| .ivsize = SERPENT_BLOCK_SIZE, |
| .setkey = ablk_set_key, |
| .encrypt = ablk_encrypt, |
| .decrypt = ablk_encrypt, |
| .geniv = "chainiv", |
| }, |
| }, |
| }, { |
| .cra_name = "lrw(serpent)", |
| .cra_driver_name = "lrw-serpent-avx2", |
| .cra_priority = 600, |
| .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
| .cra_blocksize = SERPENT_BLOCK_SIZE, |
| .cra_ctxsize = sizeof(struct async_helper_ctx), |
| .cra_alignmask = 0, |
| .cra_type = &crypto_ablkcipher_type, |
| .cra_module = THIS_MODULE, |
| .cra_list = LIST_HEAD_INIT(srp_algs[8].cra_list), |
| .cra_init = ablk_init, |
| .cra_exit = ablk_exit, |
| .cra_u = { |
| .ablkcipher = { |
| .min_keysize = SERPENT_MIN_KEY_SIZE + |
| SERPENT_BLOCK_SIZE, |
| .max_keysize = SERPENT_MAX_KEY_SIZE + |
| SERPENT_BLOCK_SIZE, |
| .ivsize = SERPENT_BLOCK_SIZE, |
| .setkey = ablk_set_key, |
| .encrypt = ablk_encrypt, |
| .decrypt = ablk_decrypt, |
| }, |
| }, |
| }, { |
| .cra_name = "xts(serpent)", |
| .cra_driver_name = "xts-serpent-avx2", |
| .cra_priority = 600, |
| .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
| .cra_blocksize = SERPENT_BLOCK_SIZE, |
| .cra_ctxsize = sizeof(struct async_helper_ctx), |
| .cra_alignmask = 0, |
| .cra_type = &crypto_ablkcipher_type, |
| .cra_module = THIS_MODULE, |
| .cra_list = LIST_HEAD_INIT(srp_algs[9].cra_list), |
| .cra_init = ablk_init, |
| .cra_exit = ablk_exit, |
| .cra_u = { |
| .ablkcipher = { |
| .min_keysize = SERPENT_MIN_KEY_SIZE * 2, |
| .max_keysize = SERPENT_MAX_KEY_SIZE * 2, |
| .ivsize = SERPENT_BLOCK_SIZE, |
| .setkey = ablk_set_key, |
| .encrypt = ablk_encrypt, |
| .decrypt = ablk_decrypt, |
| }, |
| }, |
| } }; |
| |
| static int __init init(void) |
| { |
| u64 xcr0; |
| |
| if (!cpu_has_avx2 || !cpu_has_osxsave) { |
| pr_info("AVX2 instructions are not detected.\n"); |
| return -ENODEV; |
| } |
| |
| xcr0 = xgetbv(XCR_XFEATURE_ENABLED_MASK); |
| if ((xcr0 & (XSTATE_SSE | XSTATE_YMM)) != (XSTATE_SSE | XSTATE_YMM)) { |
| pr_info("AVX detected but unusable.\n"); |
| return -ENODEV; |
| } |
| |
| return crypto_register_algs(srp_algs, ARRAY_SIZE(srp_algs)); |
| } |
| |
| static void __exit fini(void) |
| { |
| crypto_unregister_algs(srp_algs, ARRAY_SIZE(srp_algs)); |
| } |
| |
| module_init(init); |
| module_exit(fini); |
| |
| MODULE_LICENSE("GPL"); |
| MODULE_DESCRIPTION("Serpent Cipher Algorithm, AVX2 optimized"); |
| MODULE_ALIAS_CRYPTO("serpent"); |
| MODULE_ALIAS_CRYPTO("serpent-asm"); |
