arch/x86/crypto/serpent_avx_glue.c

   1 /*
   2  * Glue Code for AVX assembler versions of Serpent Cipher
   3  *
   4  * Copyright (C) 2012 Johannes Goetzfried
   5  *     <Johannes.Goetzfried@informatik.stud.uni-erlangen.de>
   6  *
   7  * Copyright © 2011-2013 Jussi Kivilinna <jussi.kivilinna@iki.fi>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
  22  * USA
  23  *
  24  */
  25
  26 #include <linux/module.h>
  27 #include <linux/hardirq.h>
  28 #include <linux/types.h>
  29 #include <linux/crypto.h>
  30 #include <linux/err.h>
  31 #include <crypto/ablk_helper.h>
  32 #include <crypto/algapi.h>
  33 #include <crypto/serpent.h>
  34 #include <crypto/cryptd.h>
  35 #include <crypto/b128ops.h>
  36 #include <crypto/ctr.h>
  37 #include <crypto/lrw.h>
  38 #include <crypto/xts.h>
  39 #include <asm/fpu/api.h>
  40 #include <asm/crypto/serpent-avx.h>
  41 #include <asm/crypto/glue_helper.h>
  42
  43 /* 8-way parallel cipher functions */
  44 asmlinkage void serpent_ecb_enc_8way_avx(struct serpent_ctx *ctx, u8 *dst,
  45                                          const u8 *src);
  46 EXPORT_SYMBOL_GPL(serpent_ecb_enc_8way_avx);
  47
  48 asmlinkage void serpent_ecb_dec_8way_avx(struct serpent_ctx *ctx, u8 *dst,
  49                                          const u8 *src);
  50 EXPORT_SYMBOL_GPL(serpent_ecb_dec_8way_avx);
  51
  52 asmlinkage void serpent_cbc_dec_8way_avx(struct serpent_ctx *ctx, u8 *dst,
  53                                          const u8 *src);
  54 EXPORT_SYMBOL_GPL(serpent_cbc_dec_8way_avx);
  55
  56 asmlinkage void serpent_ctr_8way_avx(struct serpent_ctx *ctx, u8 *dst,
  57                                      const u8 *src, le128 *iv);
  58 EXPORT_SYMBOL_GPL(serpent_ctr_8way_avx);
  59
  60 asmlinkage void serpent_xts_enc_8way_avx(struct serpent_ctx *ctx, u8 *dst,
  61                                          const u8 *src, le128 *iv);
  62 EXPORT_SYMBOL_GPL(serpent_xts_enc_8way_avx);
  63
  64 asmlinkage void serpent_xts_dec_8way_avx(struct serpent_ctx *ctx, u8 *dst,
  65                                          const u8 *src, le128 *iv);
  66 EXPORT_SYMBOL_GPL(serpent_xts_dec_8way_avx);
  67
  68 void __serpent_crypt_ctr(void *ctx, u128 *dst, const u128 *src, le128 *iv)
  69 {
  70         be128 ctrblk;
  71
  72         le128_to_be128(&ctrblk, iv);
  73         le128_inc(iv);
  74
  75         __serpent_encrypt(ctx, (u8 *)&ctrblk, (u8 *)&ctrblk);
  76         u128_xor(dst, src, (u128 *)&ctrblk);
  77 }
  78 EXPORT_SYMBOL_GPL(__serpent_crypt_ctr);
  79
  80 void serpent_xts_enc(void *ctx, u128 *dst, const u128 *src, le128 *iv)
  81 {
  82         glue_xts_crypt_128bit_one(ctx, dst, src, iv,
  83                                   GLUE_FUNC_CAST(__serpent_encrypt));
  84 }
  85 EXPORT_SYMBOL_GPL(serpent_xts_enc);
  86
  87 void serpent_xts_dec(void *ctx, u128 *dst, const u128 *src, le128 *iv)
  88 {
  89         glue_xts_crypt_128bit_one(ctx, dst, src, iv,
  90                                   GLUE_FUNC_CAST(__serpent_decrypt));
  91 }
  92 EXPORT_SYMBOL_GPL(serpent_xts_dec);
  93
  94
  95 static const struct common_glue_ctx serpent_enc = {
  96         .num_funcs = 2,
  97         .fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,
  98
  99         .funcs = { {
 100                 .num_blocks = SERPENT_PARALLEL_BLOCKS,
 101                 .fn_u = { .ecb = GLUE_FUNC_CAST(serpent_ecb_enc_8way_avx) }
 102         }, {
 103                 .num_blocks = 1,
 104                 .fn_u = { .ecb = GLUE_FUNC_CAST(__serpent_encrypt) }
 105         } }
 106 };
 107
 108 static const struct common_glue_ctx serpent_ctr = {
 109         .num_funcs = 2,
 110         .fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,
 111
 112         .funcs = { {
 113                 .num_blocks = SERPENT_PARALLEL_BLOCKS,
 114                 .fn_u = { .ctr = GLUE_CTR_FUNC_CAST(serpent_ctr_8way_avx) }
 115         }, {
 116                 .num_blocks = 1,
 117                 .fn_u = { .ctr = GLUE_CTR_FUNC_CAST(__serpent_crypt_ctr) }
 118         } }
 119 };
 120
 121 static const struct common_glue_ctx serpent_enc_xts = {
 122         .num_funcs = 2,
 123         .fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,
 124
 125         .funcs = { {
 126                 .num_blocks = SERPENT_PARALLEL_BLOCKS,
 127                 .fn_u = { .xts = GLUE_XTS_FUNC_CAST(serpent_xts_enc_8way_avx) }
 128         }, {
 129                 .num_blocks = 1,
 130                 .fn_u = { .xts = GLUE_XTS_FUNC_CAST(serpent_xts_enc) }
 131         } }
 132 };
 133
 134 static const struct common_glue_ctx serpent_dec = {
 135         .num_funcs = 2,
 136         .fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,
 137
 138         .funcs = { {
 139                 .num_blocks = SERPENT_PARALLEL_BLOCKS,
 140                 .fn_u = { .ecb = GLUE_FUNC_CAST(serpent_ecb_dec_8way_avx) }
 141         }, {
 142                 .num_blocks = 1,
 143                 .fn_u = { .ecb = GLUE_FUNC_CAST(__serpent_decrypt) }
 144         } }
 145 };
 146
 147 static const struct common_glue_ctx serpent_dec_cbc = {
 148         .num_funcs = 2,
 149         .fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,
 150
 151         .funcs = { {
 152                 .num_blocks = SERPENT_PARALLEL_BLOCKS,
 153                 .fn_u = { .cbc = GLUE_CBC_FUNC_CAST(serpent_cbc_dec_8way_avx) }
 154         }, {
 155                 .num_blocks = 1,
 156                 .fn_u = { .cbc = GLUE_CBC_FUNC_CAST(__serpent_decrypt) }
 157         } }
 158 };
 159
 160 static const struct common_glue_ctx serpent_dec_xts = {
 161         .num_funcs = 2,
 162         .fpu_blocks_limit = SERPENT_PARALLEL_BLOCKS,
 163
 164         .funcs = { {
 165                 .num_blocks = SERPENT_PARALLEL_BLOCKS,
 166                 .fn_u = { .xts = GLUE_XTS_FUNC_CAST(serpent_xts_dec_8way_avx) }
 167         }, {
 168                 .num_blocks = 1,
 169                 .fn_u = { .xts = GLUE_XTS_FUNC_CAST(serpent_xts_dec) }
 170         } }
 171 };
 172
 173 static int ecb_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
 174                        struct scatterlist *src, unsigned int nbytes)
 175 {
 176         return glue_ecb_crypt_128bit(&serpent_enc, desc, dst, src, nbytes);
 177 }
 178
 179 static int ecb_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
 180                        struct scatterlist *src, unsigned int nbytes)
 181 {
 182         return glue_ecb_crypt_128bit(&serpent_dec, desc, dst, src, nbytes);
 183 }
 184
 185 static int cbc_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
 186                        struct scatterlist *src, unsigned int nbytes)
 187 {
 188         return glue_cbc_encrypt_128bit(GLUE_FUNC_CAST(__serpent_encrypt), desc,
 189                                      dst, src, nbytes);
 190 }
 191
 192 static int cbc_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
 193                        struct scatterlist *src, unsigned int nbytes)
 194 {
 195         return glue_cbc_decrypt_128bit(&serpent_dec_cbc, desc, dst, src,
 196                                        nbytes);
 197 }
 198
 199 static int ctr_crypt(struct blkcipher_desc *desc, struct scatterlist *dst,
 200                      struct scatterlist *src, unsigned int nbytes)
 201 {
 202         return glue_ctr_crypt_128bit(&serpent_ctr, desc, dst, src, nbytes);
 203 }
 204
 205 static inline bool serpent_fpu_begin(bool fpu_enabled, unsigned int nbytes)
 206 {
 207         return glue_fpu_begin(SERPENT_BLOCK_SIZE, SERPENT_PARALLEL_BLOCKS,
 208                               NULL, fpu_enabled, nbytes);
 209 }
 210
 211 static inline void serpent_fpu_end(bool fpu_enabled)
 212 {
 213         glue_fpu_end(fpu_enabled);
 214 }
 215
 216 struct crypt_priv {
 217         struct serpent_ctx *ctx;
 218         bool fpu_enabled;
 219 };
 220
 221 static void encrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes)
 222 {
 223         const unsigned int bsize = SERPENT_BLOCK_SIZE;
 224         struct crypt_priv *ctx = priv;
 225         int i;
 226
 227         ctx->fpu_enabled = serpent_fpu_begin(ctx->fpu_enabled, nbytes);
 228
 229         if (nbytes == bsize * SERPENT_PARALLEL_BLOCKS) {
 230                 serpent_ecb_enc_8way_avx(ctx->ctx, srcdst, srcdst);
 231                 return;
 232         }
 233
 234         for (i = 0; i < nbytes / bsize; i++, srcdst += bsize)
 235                 __serpent_encrypt(ctx->ctx, srcdst, srcdst);
 236 }
 237
 238 static void decrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes)
 239 {
 240         const unsigned int bsize = SERPENT_BLOCK_SIZE;
 241         struct crypt_priv *ctx = priv;
 242         int i;
 243
 244         ctx->fpu_enabled = serpent_fpu_begin(ctx->fpu_enabled, nbytes);
 245
 246         if (nbytes == bsize * SERPENT_PARALLEL_BLOCKS) {
 247                 serpent_ecb_dec_8way_avx(ctx->ctx, srcdst, srcdst);
 248                 return;
 249         }
 250
 251         for (i = 0; i < nbytes / bsize; i++, srcdst += bsize)
 252                 __serpent_decrypt(ctx->ctx, srcdst, srcdst);
 253 }
 254
 255 int lrw_serpent_setkey(struct crypto_tfm *tfm, const u8 *key,
 256                        unsigned int keylen)
 257 {
 258         struct serpent_lrw_ctx *ctx = crypto_tfm_ctx(tfm);
 259         int err;
 260
 261         err = __serpent_setkey(&ctx->serpent_ctx, key, keylen -
 262                                                         SERPENT_BLOCK_SIZE);
 263         if (err)
 264                 return err;
 265
 266         return lrw_init_table(&ctx->lrw_table, key + keylen -
 267                                                 SERPENT_BLOCK_SIZE);
 268 }
 269 EXPORT_SYMBOL_GPL(lrw_serpent_setkey);
 270
 271 static int lrw_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
 272                        struct scatterlist *src, unsigned int nbytes)
 273 {
 274         struct serpent_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
 275         be128 buf[SERPENT_PARALLEL_BLOCKS];
 276         struct crypt_priv crypt_ctx = {
 277                 .ctx = &ctx->serpent_ctx,
 278                 .fpu_enabled = false,
 279         };
 280         struct lrw_crypt_req req = {
 281                 .tbuf = buf,
 282                 .tbuflen = sizeof(buf),
 283
 284                 .table_ctx = &ctx->lrw_table,
 285                 .crypt_ctx = &crypt_ctx,
 286                 .crypt_fn = encrypt_callback,
 287         };
 288         int ret;
 289
 290         desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
 291         ret = lrw_crypt(desc, dst, src, nbytes, &req);
 292         serpent_fpu_end(crypt_ctx.fpu_enabled);
 293
 294         return ret;
 295 }
 296
 297 static int lrw_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
 298                        struct scatterlist *src, unsigned int nbytes)
 299 {
 300         struct serpent_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
 301         be128 buf[SERPENT_PARALLEL_BLOCKS];
 302         struct crypt_priv crypt_ctx = {
 303                 .ctx = &ctx->serpent_ctx,
 304                 .fpu_enabled = false,
 305         };
 306         struct lrw_crypt_req req = {
 307                 .tbuf = buf,
 308                 .tbuflen = sizeof(buf),
 309
 310                 .table_ctx = &ctx->lrw_table,
 311                 .crypt_ctx = &crypt_ctx,
 312                 .crypt_fn = decrypt_callback,
 313         };
 314         int ret;
 315
 316         desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
 317         ret = lrw_crypt(desc, dst, src, nbytes, &req);
 318         serpent_fpu_end(crypt_ctx.fpu_enabled);
 319
 320         return ret;
 321 }
 322
 323 void lrw_serpent_exit_tfm(struct crypto_tfm *tfm)
 324 {
 325         struct serpent_lrw_ctx *ctx = crypto_tfm_ctx(tfm);
 326
 327         lrw_free_table(&ctx->lrw_table);
 328 }
 329 EXPORT_SYMBOL_GPL(lrw_serpent_exit_tfm);
 330
 331 int xts_serpent_setkey(struct crypto_tfm *tfm, const u8 *key,
 332                        unsigned int keylen)
 333 {
 334         struct serpent_xts_ctx *ctx = crypto_tfm_ctx(tfm);
 335         int err;
 336
 337         err = xts_check_key(tfm, key, keylen);
 338         if (err)
 339                 return err;
 340
 341         /* first half of xts-key is for crypt */
 342         err = __serpent_setkey(&ctx->crypt_ctx, key, keylen / 2);
 343         if (err)
 344                 return err;
 345
 346         /* second half of xts-key is for tweak */
 347         return __serpent_setkey(&ctx->tweak_ctx, key + keylen / 2, keylen / 2);
 348 }
 349 EXPORT_SYMBOL_GPL(xts_serpent_setkey);
 350
 351 static int xts_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
 352                        struct scatterlist *src, unsigned int nbytes)
 353 {
 354         struct serpent_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
 355
 356         return glue_xts_crypt_128bit(&serpent_enc_xts, desc, dst, src, nbytes,
 357                                      XTS_TWEAK_CAST(__serpent_encrypt),
 358                                      &ctx->tweak_ctx, &ctx->crypt_ctx);
 359 }
 360
 361 static int xts_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
 362                        struct scatterlist *src, unsigned int nbytes)
 363 {
 364         struct serpent_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
 365
 366         return glue_xts_crypt_128bit(&serpent_dec_xts, desc, dst, src, nbytes,
 367                                      XTS_TWEAK_CAST(__serpent_encrypt),
 368                                      &ctx->tweak_ctx, &ctx->crypt_ctx);
 369 }
 370
 371 static struct crypto_alg serpent_algs[10] = { {
 372         .cra_name               = "__ecb-serpent-avx",
 373         .cra_driver_name        = "__driver-ecb-serpent-avx",
 374         .cra_priority           = 0,
 375         .cra_flags              = CRYPTO_ALG_TYPE_BLKCIPHER |
 376                                   CRYPTO_ALG_INTERNAL,
 377         .cra_blocksize          = SERPENT_BLOCK_SIZE,
 378         .cra_ctxsize            = sizeof(struct serpent_ctx),
 379         .cra_alignmask          = 0,
 380         .cra_type               = &crypto_blkcipher_type,
 381         .cra_module             = THIS_MODULE,
 382         .cra_u = {
 383                 .blkcipher = {
 384                         .min_keysize    = SERPENT_MIN_KEY_SIZE,
 385                         .max_keysize    = SERPENT_MAX_KEY_SIZE,
 386                         .setkey         = serpent_setkey,
 387                         .encrypt        = ecb_encrypt,
 388                         .decrypt        = ecb_decrypt,
 389                 },
 390         },
 391 }, {
 392         .cra_name               = "__cbc-serpent-avx",
 393         .cra_driver_name        = "__driver-cbc-serpent-avx",
 394         .cra_priority           = 0,
 395         .cra_flags              = CRYPTO_ALG_TYPE_BLKCIPHER |
 396                                   CRYPTO_ALG_INTERNAL,
 397         .cra_blocksize          = SERPENT_BLOCK_SIZE,
 398         .cra_ctxsize            = sizeof(struct serpent_ctx),
 399         .cra_alignmask          = 0,
 400         .cra_type               = &crypto_blkcipher_type,
 401         .cra_module             = THIS_MODULE,
 402         .cra_u = {
 403                 .blkcipher = {
 404                         .min_keysize    = SERPENT_MIN_KEY_SIZE,
 405                         .max_keysize    = SERPENT_MAX_KEY_SIZE,
 406                         .setkey         = serpent_setkey,
 407                         .encrypt        = cbc_encrypt,
 408                         .decrypt        = cbc_decrypt,
 409                 },
 410         },
 411 }, {
 412         .cra_name               = "__ctr-serpent-avx",
 413         .cra_driver_name        = "__driver-ctr-serpent-avx",
 414         .cra_priority           = 0,
 415         .cra_flags              = CRYPTO_ALG_TYPE_BLKCIPHER |
 416                                   CRYPTO_ALG_INTERNAL,
 417         .cra_blocksize          = 1,
 418         .cra_ctxsize            = sizeof(struct serpent_ctx),
 419         .cra_alignmask          = 0,
 420         .cra_type               = &crypto_blkcipher_type,
 421         .cra_module             = THIS_MODULE,
 422         .cra_u = {
 423                 .blkcipher = {
 424                         .min_keysize    = SERPENT_MIN_KEY_SIZE,
 425                         .max_keysize    = SERPENT_MAX_KEY_SIZE,
 426                         .ivsize         = SERPENT_BLOCK_SIZE,
 427                         .setkey         = serpent_setkey,
 428                         .encrypt        = ctr_crypt,
 429                         .decrypt        = ctr_crypt,
 430                 },
 431         },
 432 }, {
 433         .cra_name               = "__lrw-serpent-avx",
 434         .cra_driver_name        = "__driver-lrw-serpent-avx",
 435         .cra_priority           = 0,
 436         .cra_flags              = CRYPTO_ALG_TYPE_BLKCIPHER |
 437                                   CRYPTO_ALG_INTERNAL,
 438         .cra_blocksize          = SERPENT_BLOCK_SIZE,
 439         .cra_ctxsize            = sizeof(struct serpent_lrw_ctx),
 440         .cra_alignmask          = 0,
 441         .cra_type               = &crypto_blkcipher_type,
 442         .cra_module             = THIS_MODULE,
 443         .cra_exit               = lrw_serpent_exit_tfm,
 444         .cra_u = {
 445                 .blkcipher = {
 446                         .min_keysize    = SERPENT_MIN_KEY_SIZE +
 447                                           SERPENT_BLOCK_SIZE,
 448                         .max_keysize    = SERPENT_MAX_KEY_SIZE +
 449                                           SERPENT_BLOCK_SIZE,
 450                         .ivsize         = SERPENT_BLOCK_SIZE,
 451                         .setkey         = lrw_serpent_setkey,
 452                         .encrypt        = lrw_encrypt,
 453                         .decrypt        = lrw_decrypt,
 454                 },
 455         },
 456 }, {
 457         .cra_name               = "__xts-serpent-avx",
 458         .cra_driver_name        = "__driver-xts-serpent-avx",
 459         .cra_priority           = 0,
 460         .cra_flags              = CRYPTO_ALG_TYPE_BLKCIPHER |
 461                                   CRYPTO_ALG_INTERNAL,
 462         .cra_blocksize          = SERPENT_BLOCK_SIZE,
 463         .cra_ctxsize            = sizeof(struct serpent_xts_ctx),
 464         .cra_alignmask          = 0,
 465         .cra_type               = &crypto_blkcipher_type,
 466         .cra_module             = THIS_MODULE,
 467         .cra_u = {
 468                 .blkcipher = {
 469                         .min_keysize    = SERPENT_MIN_KEY_SIZE * 2,
 470                         .max_keysize    = SERPENT_MAX_KEY_SIZE * 2,
 471                         .ivsize         = SERPENT_BLOCK_SIZE,
 472                         .setkey         = xts_serpent_setkey,
 473                         .encrypt        = xts_encrypt,
 474                         .decrypt        = xts_decrypt,
 475                 },
 476         },
 477 }, {
 478         .cra_name               = "ecb(serpent)",
 479         .cra_driver_name        = "ecb-serpent-avx",
 480         .cra_priority           = 500,
 481         .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
 482         .cra_blocksize          = SERPENT_BLOCK_SIZE,
 483         .cra_ctxsize            = sizeof(struct async_helper_ctx),
 484         .cra_alignmask          = 0,
 485         .cra_type               = &crypto_ablkcipher_type,
 486         .cra_module             = THIS_MODULE,
 487         .cra_init               = ablk_init,
 488         .cra_exit               = ablk_exit,
 489         .cra_u = {
 490                 .ablkcipher = {
 491                         .min_keysize    = SERPENT_MIN_KEY_SIZE,
 492                         .max_keysize    = SERPENT_MAX_KEY_SIZE,
 493                         .setkey         = ablk_set_key,
 494                         .encrypt        = ablk_encrypt,
 495                         .decrypt        = ablk_decrypt,
 496                 },
 497         },
 498 }, {
 499         .cra_name               = "cbc(serpent)",
 500         .cra_driver_name        = "cbc-serpent-avx",
 501         .cra_priority           = 500,
 502         .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
 503         .cra_blocksize          = SERPENT_BLOCK_SIZE,
 504         .cra_ctxsize            = sizeof(struct async_helper_ctx),
 505         .cra_alignmask          = 0,
 506         .cra_type               = &crypto_ablkcipher_type,
 507         .cra_module             = THIS_MODULE,
 508         .cra_init               = ablk_init,
 509         .cra_exit               = ablk_exit,
 510         .cra_u = {
 511                 .ablkcipher = {
 512                         .min_keysize    = SERPENT_MIN_KEY_SIZE,
 513                         .max_keysize    = SERPENT_MAX_KEY_SIZE,
 514                         .ivsize         = SERPENT_BLOCK_SIZE,
 515                         .setkey         = ablk_set_key,
 516                         .encrypt        = __ablk_encrypt,
 517                         .decrypt        = ablk_decrypt,
 518                 },
 519         },
 520 }, {
 521         .cra_name               = "ctr(serpent)",
 522         .cra_driver_name        = "ctr-serpent-avx",
 523         .cra_priority           = 500,
 524         .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
 525         .cra_blocksize          = 1,
 526         .cra_ctxsize            = sizeof(struct async_helper_ctx),
 527         .cra_alignmask          = 0,
 528         .cra_type               = &crypto_ablkcipher_type,
 529         .cra_module             = THIS_MODULE,
 530         .cra_init               = ablk_init,
 531         .cra_exit               = ablk_exit,
 532         .cra_u = {
 533                 .ablkcipher = {
 534                         .min_keysize    = SERPENT_MIN_KEY_SIZE,
 535                         .max_keysize    = SERPENT_MAX_KEY_SIZE,
 536                         .ivsize         = SERPENT_BLOCK_SIZE,
 537                         .setkey         = ablk_set_key,
 538                         .encrypt        = ablk_encrypt,
 539                         .decrypt        = ablk_encrypt,
 540                         .geniv          = "chainiv",
 541                 },
 542         },
 543 }, {
 544         .cra_name               = "lrw(serpent)",
 545         .cra_driver_name        = "lrw-serpent-avx",
 546         .cra_priority           = 500,
 547         .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
 548         .cra_blocksize          = SERPENT_BLOCK_SIZE,
 549         .cra_ctxsize            = sizeof(struct async_helper_ctx),
 550         .cra_alignmask          = 0,
 551         .cra_type               = &crypto_ablkcipher_type,
 552         .cra_module             = THIS_MODULE,
 553         .cra_init               = ablk_init,
 554         .cra_exit               = ablk_exit,
 555         .cra_u = {
 556                 .ablkcipher = {
 557                         .min_keysize    = SERPENT_MIN_KEY_SIZE +
 558                                           SERPENT_BLOCK_SIZE,
 559                         .max_keysize    = SERPENT_MAX_KEY_SIZE +
 560                                           SERPENT_BLOCK_SIZE,
 561                         .ivsize         = SERPENT_BLOCK_SIZE,
 562                         .setkey         = ablk_set_key,
 563                         .encrypt        = ablk_encrypt,
 564                         .decrypt        = ablk_decrypt,
 565                 },
 566         },
 567 }, {
 568         .cra_name               = "xts(serpent)",
 569         .cra_driver_name        = "xts-serpent-avx",
 570         .cra_priority           = 500,
 571         .cra_flags              = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
 572         .cra_blocksize          = SERPENT_BLOCK_SIZE,
 573         .cra_ctxsize            = sizeof(struct async_helper_ctx),
 574         .cra_alignmask          = 0,
 575         .cra_type               = &crypto_ablkcipher_type,
 576         .cra_module             = THIS_MODULE,
 577         .cra_init               = ablk_init,
 578         .cra_exit               = ablk_exit,
 579         .cra_u = {
 580                 .ablkcipher = {
 581                         .min_keysize    = SERPENT_MIN_KEY_SIZE * 2,
 582                         .max_keysize    = SERPENT_MAX_KEY_SIZE * 2,
 583                         .ivsize         = SERPENT_BLOCK_SIZE,
 584                         .setkey         = ablk_set_key,
 585                         .encrypt        = ablk_encrypt,
 586                         .decrypt        = ablk_decrypt,
 587                 },
 588         },
 589 } };
 590
 591 static int __init serpent_init(void)
 592 {
 593         const char *feature_name;
 594
 595         if (!cpu_has_xfeatures(XFEATURE_MASK_SSE | XFEATURE_MASK_YMM,
 596                                 &feature_name)) {
 597                 pr_info("CPU feature '%s' is not supported.\n", feature_name);
 598                 return -ENODEV;
 599         }
 600
 601         return crypto_register_algs(serpent_algs, ARRAY_SIZE(serpent_algs));
 602 }
 603
 604 static void __exit serpent_exit(void)
 605 {
 606         crypto_unregister_algs(serpent_algs, ARRAY_SIZE(serpent_algs));
 607 }
 608
 609 module_init(serpent_init);
 610 module_exit(serpent_exit);
 611
 612 MODULE_DESCRIPTION("Serpent Cipher Algorithm, AVX optimized");
 613 MODULE_LICENSE("GPL");
 614 MODULE_ALIAS_CRYPTO("serpent");