arch/x86/crypto/aesni-intel_glue.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Support for Intel AES-NI instructions. This file contains glue
   4  * code, the real AES implementation is in intel-aes_asm.S.
   5  *
   6  * Copyright (C) 2008, Intel Corp.
   7  *    Author: Huang Ying <ying.huang@intel.com>
   8  *
   9  * Added RFC4106 AES-GCM support for 128-bit keys under the AEAD
  10  * interface for 64-bit kernels.
  11  *    Authors: Adrian Hoban <adrian.hoban@intel.com>
  12  *             Gabriele Paoloni <gabriele.paoloni@intel.com>
  13  *             Tadeusz Struk (tadeusz.struk@intel.com)
  14  *             Aidan O'Mahony (aidan.o.mahony@intel.com)
  15  *    Copyright (c) 2010, Intel Corporation.
  16  */
  17
  18 #include <linux/hardirq.h>
  19 #include <linux/types.h>
  20 #include <linux/module.h>
  21 #include <linux/err.h>
  22 #include <crypto/algapi.h>
  23 #include <crypto/aes.h>
  24 #include <crypto/ctr.h>
  25 #include <crypto/b128ops.h>
  26 #include <crypto/gcm.h>
  27 #include <crypto/xts.h>
  28 #include <asm/cpu_device_id.h>
  29 #include <asm/simd.h>
  30 #include <crypto/scatterwalk.h>
  31 #include <crypto/internal/aead.h>
  32 #include <crypto/internal/simd.h>
  33 #include <crypto/internal/skcipher.h>
  34 #include <linux/workqueue.h>
  35 #include <linux/spinlock.h>
  36 #ifdef CONFIG_X86_64
  37 #include <asm/crypto/glue_helper.h>
  38 #endif
  39
  40
  41 #define AESNI_ALIGN     16
  42 #define AESNI_ALIGN_ATTR __attribute__ ((__aligned__(AESNI_ALIGN)))
  43 #define AES_BLOCK_MASK  (~(AES_BLOCK_SIZE - 1))
  44 #define RFC4106_HASH_SUBKEY_SIZE 16
  45 #define AESNI_ALIGN_EXTRA ((AESNI_ALIGN - 1) & ~(CRYPTO_MINALIGN - 1))
  46 #define CRYPTO_AES_CTX_SIZE (sizeof(struct crypto_aes_ctx) + AESNI_ALIGN_EXTRA)
  47 #define XTS_AES_CTX_SIZE (sizeof(struct aesni_xts_ctx) + AESNI_ALIGN_EXTRA)
  48
  49 /* This data is stored at the end of the crypto_tfm struct.
  50  * It's a type of per "session" data storage location.
  51  * This needs to be 16 byte aligned.
  52  */
  53 struct aesni_rfc4106_gcm_ctx {
  54         u8 hash_subkey[16] AESNI_ALIGN_ATTR;
  55         struct crypto_aes_ctx aes_key_expanded AESNI_ALIGN_ATTR;
  56         u8 nonce[4];
  57 };
  58
  59 struct generic_gcmaes_ctx {
  60         u8 hash_subkey[16] AESNI_ALIGN_ATTR;
  61         struct crypto_aes_ctx aes_key_expanded AESNI_ALIGN_ATTR;
  62 };
  63
  64 struct aesni_xts_ctx {
  65         u8 raw_tweak_ctx[sizeof(struct crypto_aes_ctx)] AESNI_ALIGN_ATTR;
  66         u8 raw_crypt_ctx[sizeof(struct crypto_aes_ctx)] AESNI_ALIGN_ATTR;
  67 };
  68
  69 #define GCM_BLOCK_LEN 16
  70
  71 struct gcm_context_data {
  72         /* init, update and finalize context data */
  73         u8 aad_hash[GCM_BLOCK_LEN];
  74         u64 aad_length;
  75         u64 in_length;
  76         u8 partial_block_enc_key[GCM_BLOCK_LEN];
  77         u8 orig_IV[GCM_BLOCK_LEN];
  78         u8 current_counter[GCM_BLOCK_LEN];
  79         u64 partial_block_len;
  80         u64 unused;
  81         u8 hash_keys[GCM_BLOCK_LEN * 16];
  82 };
  83
  84 asmlinkage int aesni_set_key(struct crypto_aes_ctx *ctx, const u8 *in_key,
  85                              unsigned int key_len);
  86 asmlinkage void aesni_enc(const void *ctx, u8 *out, const u8 *in);
  87 asmlinkage void aesni_dec(const void *ctx, u8 *out, const u8 *in);
  88 asmlinkage void aesni_ecb_enc(struct crypto_aes_ctx *ctx, u8 *out,
  89                               const u8 *in, unsigned int len);
  90 asmlinkage void aesni_ecb_dec(struct crypto_aes_ctx *ctx, u8 *out,
  91                               const u8 *in, unsigned int len);
  92 asmlinkage void aesni_cbc_enc(struct crypto_aes_ctx *ctx, u8 *out,
  93                               const u8 *in, unsigned int len, u8 *iv);
  94 asmlinkage void aesni_cbc_dec(struct crypto_aes_ctx *ctx, u8 *out,
  95                               const u8 *in, unsigned int len, u8 *iv);
  96
  97 #define AVX_GEN2_OPTSIZE 640
  98 #define AVX_GEN4_OPTSIZE 4096
  99
 100 asmlinkage void aesni_xts_encrypt(const struct crypto_aes_ctx *ctx, u8 *out,
 101                                   const u8 *in, unsigned int len, u8 *iv);
 102
 103 asmlinkage void aesni_xts_decrypt(const struct crypto_aes_ctx *ctx, u8 *out,
 104                                   const u8 *in, unsigned int len, u8 *iv);
 105
 106 #ifdef CONFIG_X86_64
 107
 108 static void (*aesni_ctr_enc_tfm)(struct crypto_aes_ctx *ctx, u8 *out,
 109                               const u8 *in, unsigned int len, u8 *iv);
 110 asmlinkage void aesni_ctr_enc(struct crypto_aes_ctx *ctx, u8 *out,
 111                               const u8 *in, unsigned int len, u8 *iv);
 112
 113 /* asmlinkage void aesni_gcm_enc()
 114  * void *ctx,  AES Key schedule. Starts on a 16 byte boundary.
 115  * struct gcm_context_data.  May be uninitialized.
 116  * u8 *out, Ciphertext output. Encrypt in-place is allowed.
 117  * const u8 *in, Plaintext input
 118  * unsigned long plaintext_len, Length of data in bytes for encryption.
 119  * u8 *iv, Pre-counter block j0: 12 byte IV concatenated with 0x00000001.
 120  *         16-byte aligned pointer.
 121  * u8 *hash_subkey, the Hash sub key input. Data starts on a 16-byte boundary.
 122  * const u8 *aad, Additional Authentication Data (AAD)
 123  * unsigned long aad_len, Length of AAD in bytes.
 124  * u8 *auth_tag, Authenticated Tag output.
 125  * unsigned long auth_tag_len), Authenticated Tag Length in bytes.
 126  *          Valid values are 16 (most likely), 12 or 8.
 127  */
 128 asmlinkage void aesni_gcm_enc(void *ctx,
 129                         struct gcm_context_data *gdata, u8 *out,
 130                         const u8 *in, unsigned long plaintext_len, u8 *iv,
 131                         u8 *hash_subkey, const u8 *aad, unsigned long aad_len,
 132                         u8 *auth_tag, unsigned long auth_tag_len);
 133
 134 /* asmlinkage void aesni_gcm_dec()
 135  * void *ctx, AES Key schedule. Starts on a 16 byte boundary.
 136  * struct gcm_context_data.  May be uninitialized.
 137  * u8 *out, Plaintext output. Decrypt in-place is allowed.
 138  * const u8 *in, Ciphertext input
 139  * unsigned long ciphertext_len, Length of data in bytes for decryption.
 140  * u8 *iv, Pre-counter block j0: 12 byte IV concatenated with 0x00000001.
 141  *         16-byte aligned pointer.
 142  * u8 *hash_subkey, the Hash sub key input. Data starts on a 16-byte boundary.
 143  * const u8 *aad, Additional Authentication Data (AAD)
 144  * unsigned long aad_len, Length of AAD in bytes. With RFC4106 this is going
 145  * to be 8 or 12 bytes
 146  * u8 *auth_tag, Authenticated Tag output.
 147  * unsigned long auth_tag_len) Authenticated Tag Length in bytes.
 148  * Valid values are 16 (most likely), 12 or 8.
 149  */
 150 asmlinkage void aesni_gcm_dec(void *ctx,
 151                         struct gcm_context_data *gdata, u8 *out,
 152                         const u8 *in, unsigned long ciphertext_len, u8 *iv,
 153                         u8 *hash_subkey, const u8 *aad, unsigned long aad_len,
 154                         u8 *auth_tag, unsigned long auth_tag_len);
 155
 156 /* Scatter / Gather routines, with args similar to above */
 157 asmlinkage void aesni_gcm_init(void *ctx,
 158                                struct gcm_context_data *gdata,
 159                                u8 *iv,
 160                                u8 *hash_subkey, const u8 *aad,
 161                                unsigned long aad_len);
 162 asmlinkage void aesni_gcm_enc_update(void *ctx,
 163                                      struct gcm_context_data *gdata, u8 *out,
 164                                      const u8 *in, unsigned long plaintext_len);
 165 asmlinkage void aesni_gcm_dec_update(void *ctx,
 166                                      struct gcm_context_data *gdata, u8 *out,
 167                                      const u8 *in,
 168                                      unsigned long ciphertext_len);
 169 asmlinkage void aesni_gcm_finalize(void *ctx,
 170                                    struct gcm_context_data *gdata,
 171                                    u8 *auth_tag, unsigned long auth_tag_len);
 172
 173 static const struct aesni_gcm_tfm_s {
 174         void (*init)(void *ctx, struct gcm_context_data *gdata, u8 *iv,
 175                      u8 *hash_subkey, const u8 *aad, unsigned long aad_len);
 176         void (*enc_update)(void *ctx, struct gcm_context_data *gdata, u8 *out,
 177                            const u8 *in, unsigned long plaintext_len);
 178         void (*dec_update)(void *ctx, struct gcm_context_data *gdata, u8 *out,
 179                            const u8 *in, unsigned long ciphertext_len);
 180         void (*finalize)(void *ctx, struct gcm_context_data *gdata,
 181                          u8 *auth_tag, unsigned long auth_tag_len);
 182 } *aesni_gcm_tfm;
 183
 184 static const struct aesni_gcm_tfm_s aesni_gcm_tfm_sse = {
 185         .init = &aesni_gcm_init,
 186         .enc_update = &aesni_gcm_enc_update,
 187         .dec_update = &aesni_gcm_dec_update,
 188         .finalize = &aesni_gcm_finalize,
 189 };
 190
 191 #ifdef CONFIG_AS_AVX
 192 asmlinkage void aes_ctr_enc_128_avx_by8(const u8 *in, u8 *iv,
 193                 void *keys, u8 *out, unsigned int num_bytes);
 194 asmlinkage void aes_ctr_enc_192_avx_by8(const u8 *in, u8 *iv,
 195                 void *keys, u8 *out, unsigned int num_bytes);
 196 asmlinkage void aes_ctr_enc_256_avx_by8(const u8 *in, u8 *iv,
 197                 void *keys, u8 *out, unsigned int num_bytes);
 198 /*
 199  * asmlinkage void aesni_gcm_init_avx_gen2()
 200  * gcm_data *my_ctx_data, context data
 201  * u8 *hash_subkey,  the Hash sub key input. Data starts on a 16-byte boundary.
 202  */
 203 asmlinkage void aesni_gcm_init_avx_gen2(void *my_ctx_data,
 204                                         struct gcm_context_data *gdata,
 205                                         u8 *iv,
 206                                         u8 *hash_subkey,
 207                                         const u8 *aad,
 208                                         unsigned long aad_len);
 209
 210 asmlinkage void aesni_gcm_enc_update_avx_gen2(void *ctx,
 211                                      struct gcm_context_data *gdata, u8 *out,
 212                                      const u8 *in, unsigned long plaintext_len);
 213 asmlinkage void aesni_gcm_dec_update_avx_gen2(void *ctx,
 214                                      struct gcm_context_data *gdata, u8 *out,
 215                                      const u8 *in,
 216                                      unsigned long ciphertext_len);
 217 asmlinkage void aesni_gcm_finalize_avx_gen2(void *ctx,
 218                                    struct gcm_context_data *gdata,
 219                                    u8 *auth_tag, unsigned long auth_tag_len);
 220
 221 asmlinkage void aesni_gcm_enc_avx_gen2(void *ctx,
 222                                 struct gcm_context_data *gdata, u8 *out,
 223                         const u8 *in, unsigned long plaintext_len, u8 *iv,
 224                         const u8 *aad, unsigned long aad_len,
 225                         u8 *auth_tag, unsigned long auth_tag_len);
 226
 227 asmlinkage void aesni_gcm_dec_avx_gen2(void *ctx,
 228                                 struct gcm_context_data *gdata, u8 *out,
 229                         const u8 *in, unsigned long ciphertext_len, u8 *iv,
 230                         const u8 *aad, unsigned long aad_len,
 231                         u8 *auth_tag, unsigned long auth_tag_len);
 232
 233 static const struct aesni_gcm_tfm_s aesni_gcm_tfm_avx_gen2 = {
 234         .init = &aesni_gcm_init_avx_gen2,
 235         .enc_update = &aesni_gcm_enc_update_avx_gen2,
 236         .dec_update = &aesni_gcm_dec_update_avx_gen2,
 237         .finalize = &aesni_gcm_finalize_avx_gen2,
 238 };
 239
 240 #endif
 241
 242 #ifdef CONFIG_AS_AVX2
 243 /*
 244  * asmlinkage void aesni_gcm_init_avx_gen4()
 245  * gcm_data *my_ctx_data, context data
 246  * u8 *hash_subkey,  the Hash sub key input. Data starts on a 16-byte boundary.
 247  */
 248 asmlinkage void aesni_gcm_init_avx_gen4(void *my_ctx_data,
 249                                         struct gcm_context_data *gdata,
 250                                         u8 *iv,
 251                                         u8 *hash_subkey,
 252                                         const u8 *aad,
 253                                         unsigned long aad_len);
 254
 255 asmlinkage void aesni_gcm_enc_update_avx_gen4(void *ctx,
 256                                      struct gcm_context_data *gdata, u8 *out,
 257                                      const u8 *in, unsigned long plaintext_len);
 258 asmlinkage void aesni_gcm_dec_update_avx_gen4(void *ctx,
 259                                      struct gcm_context_data *gdata, u8 *out,
 260                                      const u8 *in,
 261                                      unsigned long ciphertext_len);
 262 asmlinkage void aesni_gcm_finalize_avx_gen4(void *ctx,
 263                                    struct gcm_context_data *gdata,
 264                                    u8 *auth_tag, unsigned long auth_tag_len);
 265
 266 asmlinkage void aesni_gcm_enc_avx_gen4(void *ctx,
 267                                 struct gcm_context_data *gdata, u8 *out,
 268                         const u8 *in, unsigned long plaintext_len, u8 *iv,
 269                         const u8 *aad, unsigned long aad_len,
 270                         u8 *auth_tag, unsigned long auth_tag_len);
 271
 272 asmlinkage void aesni_gcm_dec_avx_gen4(void *ctx,
 273                                 struct gcm_context_data *gdata, u8 *out,
 274                         const u8 *in, unsigned long ciphertext_len, u8 *iv,
 275                         const u8 *aad, unsigned long aad_len,
 276                         u8 *auth_tag, unsigned long auth_tag_len);
 277
 278 static const struct aesni_gcm_tfm_s aesni_gcm_tfm_avx_gen4 = {
 279         .init = &aesni_gcm_init_avx_gen4,
 280         .enc_update = &aesni_gcm_enc_update_avx_gen4,
 281         .dec_update = &aesni_gcm_dec_update_avx_gen4,
 282         .finalize = &aesni_gcm_finalize_avx_gen4,
 283 };
 284
 285 #endif
 286
 287 static inline struct
 288 aesni_rfc4106_gcm_ctx *aesni_rfc4106_gcm_ctx_get(struct crypto_aead *tfm)
 289 {
 290         unsigned long align = AESNI_ALIGN;
 291
 292         if (align <= crypto_tfm_ctx_alignment())
 293                 align = 1;
 294         return PTR_ALIGN(crypto_aead_ctx(tfm), align);
 295 }
 296
 297 static inline struct
 298 generic_gcmaes_ctx *generic_gcmaes_ctx_get(struct crypto_aead *tfm)
 299 {
 300         unsigned long align = AESNI_ALIGN;
 301
 302         if (align <= crypto_tfm_ctx_alignment())
 303                 align = 1;
 304         return PTR_ALIGN(crypto_aead_ctx(tfm), align);
 305 }
 306 #endif
 307
 308 static inline struct crypto_aes_ctx *aes_ctx(void *raw_ctx)
 309 {
 310         unsigned long addr = (unsigned long)raw_ctx;
 311         unsigned long align = AESNI_ALIGN;
 312
 313         if (align <= crypto_tfm_ctx_alignment())
 314                 align = 1;
 315         return (struct crypto_aes_ctx *)ALIGN(addr, align);
 316 }
 317
 318 static int aes_set_key_common(struct crypto_tfm *tfm, void *raw_ctx,
 319                               const u8 *in_key, unsigned int key_len)
 320 {
 321         struct crypto_aes_ctx *ctx = aes_ctx(raw_ctx);
 322         u32 *flags = &tfm->crt_flags;
 323         int err;
 324
 325         if (key_len != AES_KEYSIZE_128 && key_len != AES_KEYSIZE_192 &&
 326             key_len != AES_KEYSIZE_256) {
 327                 *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
 328                 return -EINVAL;
 329         }
 330
 331         if (!crypto_simd_usable())
 332                 err = aes_expandkey(ctx, in_key, key_len);
 333         else {
 334                 kernel_fpu_begin();
 335                 err = aesni_set_key(ctx, in_key, key_len);
 336                 kernel_fpu_end();
 337         }
 338
 339         return err;
 340 }
 341
 342 static int aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
 343                        unsigned int key_len)
 344 {
 345         return aes_set_key_common(tfm, crypto_tfm_ctx(tfm), in_key, key_len);
 346 }
 347
 348 static void aesni_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
 349 {
 350         struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));
 351
 352         if (!crypto_simd_usable()) {
 353                 aes_encrypt(ctx, dst, src);
 354         } else {
 355                 kernel_fpu_begin();
 356                 aesni_enc(ctx, dst, src);
 357                 kernel_fpu_end();
 358         }
 359 }
 360
 361 static void aesni_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
 362 {
 363         struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));
 364
 365         if (!crypto_simd_usable()) {
 366                 aes_decrypt(ctx, dst, src);
 367         } else {
 368                 kernel_fpu_begin();
 369                 aesni_dec(ctx, dst, src);
 370                 kernel_fpu_end();
 371         }
 372 }
 373
 374 static int aesni_skcipher_setkey(struct crypto_skcipher *tfm, const u8 *key,
 375                                  unsigned int len)
 376 {
 377         return aes_set_key_common(crypto_skcipher_tfm(tfm),
 378                                   crypto_skcipher_ctx(tfm), key, len);
 379 }
 380
 381 static int ecb_encrypt(struct skcipher_request *req)
 382 {
 383         struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 384         struct crypto_aes_ctx *ctx = aes_ctx(crypto_skcipher_ctx(tfm));
 385         struct skcipher_walk walk;
 386         unsigned int nbytes;
 387         int err;
 388
 389         err = skcipher_walk_virt(&walk, req, true);
 390
 391         kernel_fpu_begin();
 392         while ((nbytes = walk.nbytes)) {
 393                 aesni_ecb_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr,
 394                               nbytes & AES_BLOCK_MASK);
 395                 nbytes &= AES_BLOCK_SIZE - 1;
 396                 err = skcipher_walk_done(&walk, nbytes);
 397         }
 398         kernel_fpu_end();
 399
 400         return err;
 401 }
 402
 403 static int ecb_decrypt(struct skcipher_request *req)
 404 {
 405         struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 406         struct crypto_aes_ctx *ctx = aes_ctx(crypto_skcipher_ctx(tfm));
 407         struct skcipher_walk walk;
 408         unsigned int nbytes;
 409         int err;
 410
 411         err = skcipher_walk_virt(&walk, req, true);
 412
 413         kernel_fpu_begin();
 414         while ((nbytes = walk.nbytes)) {
 415                 aesni_ecb_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr,
 416                               nbytes & AES_BLOCK_MASK);
 417                 nbytes &= AES_BLOCK_SIZE - 1;
 418                 err = skcipher_walk_done(&walk, nbytes);
 419         }
 420         kernel_fpu_end();
 421
 422         return err;
 423 }
 424
 425 static int cbc_encrypt(struct skcipher_request *req)
 426 {
 427         struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 428         struct crypto_aes_ctx *ctx = aes_ctx(crypto_skcipher_ctx(tfm));
 429         struct skcipher_walk walk;
 430         unsigned int nbytes;
 431         int err;
 432
 433         err = skcipher_walk_virt(&walk, req, true);
 434
 435         kernel_fpu_begin();
 436         while ((nbytes = walk.nbytes)) {
 437                 aesni_cbc_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr,
 438                               nbytes & AES_BLOCK_MASK, walk.iv);
 439                 nbytes &= AES_BLOCK_SIZE - 1;
 440                 err = skcipher_walk_done(&walk, nbytes);
 441         }
 442         kernel_fpu_end();
 443
 444         return err;
 445 }
 446
 447 static int cbc_decrypt(struct skcipher_request *req)
 448 {
 449         struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 450         struct crypto_aes_ctx *ctx = aes_ctx(crypto_skcipher_ctx(tfm));
 451         struct skcipher_walk walk;
 452         unsigned int nbytes;
 453         int err;
 454
 455         err = skcipher_walk_virt(&walk, req, true);
 456
 457         kernel_fpu_begin();
 458         while ((nbytes = walk.nbytes)) {
 459                 aesni_cbc_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr,
 460                               nbytes & AES_BLOCK_MASK, walk.iv);
 461                 nbytes &= AES_BLOCK_SIZE - 1;
 462                 err = skcipher_walk_done(&walk, nbytes);
 463         }
 464         kernel_fpu_end();
 465
 466         return err;
 467 }
 468
 469 #ifdef CONFIG_X86_64
 470 static void ctr_crypt_final(struct crypto_aes_ctx *ctx,
 471                             struct skcipher_walk *walk)
 472 {
 473         u8 *ctrblk = walk->iv;
 474         u8 keystream[AES_BLOCK_SIZE];
 475         u8 *src = walk->src.virt.addr;
 476         u8 *dst = walk->dst.virt.addr;
 477         unsigned int nbytes = walk->nbytes;
 478
 479         aesni_enc(ctx, keystream, ctrblk);
 480         crypto_xor_cpy(dst, keystream, src, nbytes);
 481
 482         crypto_inc(ctrblk, AES_BLOCK_SIZE);
 483 }
 484
 485 #ifdef CONFIG_AS_AVX
 486 static void aesni_ctr_enc_avx_tfm(struct crypto_aes_ctx *ctx, u8 *out,
 487                               const u8 *in, unsigned int len, u8 *iv)
 488 {
 489         /*
 490          * based on key length, override with the by8 version
 491          * of ctr mode encryption/decryption for improved performance
 492          * aes_set_key_common() ensures that key length is one of
 493          * {128,192,256}
 494          */
 495         if (ctx->key_length == AES_KEYSIZE_128)
 496                 aes_ctr_enc_128_avx_by8(in, iv, (void *)ctx, out, len);
 497         else if (ctx->key_length == AES_KEYSIZE_192)
 498                 aes_ctr_enc_192_avx_by8(in, iv, (void *)ctx, out, len);
 499         else
 500                 aes_ctr_enc_256_avx_by8(in, iv, (void *)ctx, out, len);
 501 }
 502 #endif
 503
 504 static int ctr_crypt(struct skcipher_request *req)
 505 {
 506         struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 507         struct crypto_aes_ctx *ctx = aes_ctx(crypto_skcipher_ctx(tfm));
 508         struct skcipher_walk walk;
 509         unsigned int nbytes;
 510         int err;
 511
 512         err = skcipher_walk_virt(&walk, req, true);
 513
 514         kernel_fpu_begin();
 515         while ((nbytes = walk.nbytes) >= AES_BLOCK_SIZE) {
 516                 aesni_ctr_enc_tfm(ctx, walk.dst.virt.addr, walk.src.virt.addr,
 517                                       nbytes & AES_BLOCK_MASK, walk.iv);
 518                 nbytes &= AES_BLOCK_SIZE - 1;
 519                 err = skcipher_walk_done(&walk, nbytes);
 520         }
 521         if (walk.nbytes) {
 522                 ctr_crypt_final(ctx, &walk);
 523                 err = skcipher_walk_done(&walk, 0);
 524         }
 525         kernel_fpu_end();
 526
 527         return err;
 528 }
 529
 530 static int xts_aesni_setkey(struct crypto_skcipher *tfm, const u8 *key,
 531                             unsigned int keylen)
 532 {
 533         struct aesni_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
 534         int err;
 535
 536         err = xts_verify_key(tfm, key, keylen);
 537         if (err)
 538                 return err;
 539
 540         keylen /= 2;
 541
 542         /* first half of xts-key is for crypt */
 543         err = aes_set_key_common(crypto_skcipher_tfm(tfm), ctx->raw_crypt_ctx,
 544                                  key, keylen);
 545         if (err)
 546                 return err;
 547
 548         /* second half of xts-key is for tweak */
 549         return aes_set_key_common(crypto_skcipher_tfm(tfm), ctx->raw_tweak_ctx,
 550                                   key + keylen, keylen);
 551 }
 552
 553
 554 static void aesni_xts_enc(const void *ctx, u8 *dst, const u8 *src, le128 *iv)
 555 {
 556         glue_xts_crypt_128bit_one(ctx, dst, src, iv, aesni_enc);
 557 }
 558
 559 static void aesni_xts_dec(const void *ctx, u8 *dst, const u8 *src, le128 *iv)
 560 {
 561         glue_xts_crypt_128bit_one(ctx, dst, src, iv, aesni_dec);
 562 }
 563
 564 static void aesni_xts_enc32(const void *ctx, u8 *dst, const u8 *src, le128 *iv)
 565 {
 566         aesni_xts_encrypt(ctx, dst, src, 32 * AES_BLOCK_SIZE, (u8 *)iv);
 567 }
 568
 569 static void aesni_xts_dec32(const void *ctx, u8 *dst, const u8 *src, le128 *iv)
 570 {
 571         aesni_xts_decrypt(ctx, dst, src, 32 * AES_BLOCK_SIZE, (u8 *)iv);
 572 }
 573
 574 static const struct common_glue_ctx aesni_enc_xts = {
 575         .num_funcs = 2,
 576         .fpu_blocks_limit = 1,
 577
 578         .funcs = { {
 579                 .num_blocks = 32,
 580                 .fn_u = { .xts = aesni_xts_enc32 }
 581         }, {
 582                 .num_blocks = 1,
 583                 .fn_u = { .xts = aesni_xts_enc }
 584         } }
 585 };
 586
 587 static const struct common_glue_ctx aesni_dec_xts = {
 588         .num_funcs = 2,
 589         .fpu_blocks_limit = 1,
 590
 591         .funcs = { {
 592                 .num_blocks = 32,
 593                 .fn_u = { .xts = aesni_xts_dec32 }
 594         }, {
 595                 .num_blocks = 1,
 596                 .fn_u = { .xts = aesni_xts_dec }
 597         } }
 598 };
 599
 600 static int xts_encrypt(struct skcipher_request *req)
 601 {
 602         struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 603         struct aesni_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
 604
 605         return glue_xts_req_128bit(&aesni_enc_xts, req, aesni_enc,
 606                                    aes_ctx(ctx->raw_tweak_ctx),
 607                                    aes_ctx(ctx->raw_crypt_ctx),
 608                                    false);
 609 }
 610
 611 static int xts_decrypt(struct skcipher_request *req)
 612 {
 613         struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
 614         struct aesni_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
 615
 616         return glue_xts_req_128bit(&aesni_dec_xts, req, aesni_enc,
 617                                    aes_ctx(ctx->raw_tweak_ctx),
 618                                    aes_ctx(ctx->raw_crypt_ctx),
 619                                    true);
 620 }
 621
 622 static int
 623 rfc4106_set_hash_subkey(u8 *hash_subkey, const u8 *key, unsigned int key_len)
 624 {
 625         struct crypto_aes_ctx ctx;
 626         int ret;
 627
 628         ret = aes_expandkey(&ctx, key, key_len);
 629         if (ret)
 630                 return ret;
 631
 632         /* Clear the data in the hash sub key container to zero.*/
 633         /* We want to cipher all zeros to create the hash sub key. */
 634         memset(hash_subkey, 0, RFC4106_HASH_SUBKEY_SIZE);
 635
 636         aes_encrypt(&ctx, hash_subkey, hash_subkey);
 637
 638         memzero_explicit(&ctx, sizeof(ctx));
 639         return 0;
 640 }
 641
 642 static int common_rfc4106_set_key(struct crypto_aead *aead, const u8 *key,
 643                                   unsigned int key_len)
 644 {
 645         struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(aead);
 646
 647         if (key_len < 4) {
 648                 crypto_aead_set_flags(aead, CRYPTO_TFM_RES_BAD_KEY_LEN);
 649                 return -EINVAL;
 650         }
 651         /*Account for 4 byte nonce at the end.*/
 652         key_len -= 4;
 653
 654         memcpy(ctx->nonce, key + key_len, sizeof(ctx->nonce));
 655
 656         return aes_set_key_common(crypto_aead_tfm(aead),
 657                                   &ctx->aes_key_expanded, key, key_len) ?:
 658                rfc4106_set_hash_subkey(ctx->hash_subkey, key, key_len);
 659 }
 660
 661 /* This is the Integrity Check Value (aka the authentication tag) length and can
 662  * be 8, 12 or 16 bytes long. */
 663 static int common_rfc4106_set_authsize(struct crypto_aead *aead,
 664                                        unsigned int authsize)
 665 {
 666         switch (authsize) {
 667         case 8:
 668         case 12:
 669         case 16:
 670                 break;
 671         default:
 672                 return -EINVAL;
 673         }
 674
 675         return 0;
 676 }
 677
 678 static int generic_gcmaes_set_authsize(struct crypto_aead *tfm,
 679                                        unsigned int authsize)
 680 {
 681         switch (authsize) {
 682         case 4:
 683         case 8:
 684         case 12:
 685         case 13:
 686         case 14:
 687         case 15:
 688         case 16:
 689                 break;
 690         default:
 691                 return -EINVAL;
 692         }
 693
 694         return 0;
 695 }
 696
 697 static int gcmaes_crypt_by_sg(bool enc, struct aead_request *req,
 698                               unsigned int assoclen, u8 *hash_subkey,
 699                               u8 *iv, void *aes_ctx)
 700 {
 701         struct crypto_aead *tfm = crypto_aead_reqtfm(req);
 702         unsigned long auth_tag_len = crypto_aead_authsize(tfm);
 703         const struct aesni_gcm_tfm_s *gcm_tfm = aesni_gcm_tfm;
 704         u8 databuf[sizeof(struct gcm_context_data) + (AESNI_ALIGN - 8)] __aligned(8);
 705         struct gcm_context_data *data = PTR_ALIGN((void *)databuf, AESNI_ALIGN);
 706         struct scatter_walk dst_sg_walk = {};
 707         unsigned long left = req->cryptlen;
 708         unsigned long len, srclen, dstlen;
 709         struct scatter_walk assoc_sg_walk;
 710         struct scatter_walk src_sg_walk;
 711         struct scatterlist src_start[2];
 712         struct scatterlist dst_start[2];
 713         struct scatterlist *src_sg;
 714         struct scatterlist *dst_sg;
 715         u8 *src, *dst, *assoc;
 716         u8 *assocmem = NULL;
 717         u8 authTag[16];
 718
 719         if (!enc)
 720                 left -= auth_tag_len;
 721
 722 #ifdef CONFIG_AS_AVX2
 723         if (left < AVX_GEN4_OPTSIZE && gcm_tfm == &aesni_gcm_tfm_avx_gen4)
 724                 gcm_tfm = &aesni_gcm_tfm_avx_gen2;
 725 #endif
 726 #ifdef CONFIG_AS_AVX
 727         if (left < AVX_GEN2_OPTSIZE && gcm_tfm == &aesni_gcm_tfm_avx_gen2)
 728                 gcm_tfm = &aesni_gcm_tfm_sse;
 729 #endif
 730
 731         /* Linearize assoc, if not already linear */
 732         if (req->src->length >= assoclen && req->src->length &&
 733                 (!PageHighMem(sg_page(req->src)) ||
 734                         req->src->offset + req->src->length <= PAGE_SIZE)) {
 735                 scatterwalk_start(&assoc_sg_walk, req->src);
 736                 assoc = scatterwalk_map(&assoc_sg_walk);
 737         } else {
 738                 /* assoc can be any length, so must be on heap */
 739                 assocmem = kmalloc(assoclen, GFP_ATOMIC);
 740                 if (unlikely(!assocmem))
 741                         return -ENOMEM;
 742                 assoc = assocmem;
 743
 744                 scatterwalk_map_and_copy(assoc, req->src, 0, assoclen, 0);
 745         }
 746
 747         if (left) {
 748                 src_sg = scatterwalk_ffwd(src_start, req->src, req->assoclen);
 749                 scatterwalk_start(&src_sg_walk, src_sg);
 750                 if (req->src != req->dst) {
 751                         dst_sg = scatterwalk_ffwd(dst_start, req->dst,
 752                                                   req->assoclen);
 753                         scatterwalk_start(&dst_sg_walk, dst_sg);
 754                 }
 755         }
 756
 757         kernel_fpu_begin();
 758         gcm_tfm->init(aes_ctx, data, iv, hash_subkey, assoc, assoclen);
 759         if (req->src != req->dst) {
 760                 while (left) {
 761                         src = scatterwalk_map(&src_sg_walk);
 762                         dst = scatterwalk_map(&dst_sg_walk);
 763                         srclen = scatterwalk_clamp(&src_sg_walk, left);
 764                         dstlen = scatterwalk_clamp(&dst_sg_walk, left);
 765                         len = min(srclen, dstlen);
 766                         if (len) {
 767                                 if (enc)
 768                                         gcm_tfm->enc_update(aes_ctx, data,
 769                                                              dst, src, len);
 770                                 else
 771                                         gcm_tfm->dec_update(aes_ctx, data,
 772                                                              dst, src, len);
 773                         }
 774                         left -= len;
 775
 776                         scatterwalk_unmap(src);
 777                         scatterwalk_unmap(dst);
 778                         scatterwalk_advance(&src_sg_walk, len);
 779                         scatterwalk_advance(&dst_sg_walk, len);
 780                         scatterwalk_done(&src_sg_walk, 0, left);
 781                         scatterwalk_done(&dst_sg_walk, 1, left);
 782                 }
 783         } else {
 784                 while (left) {
 785                         dst = src = scatterwalk_map(&src_sg_walk);
 786                         len = scatterwalk_clamp(&src_sg_walk, left);
 787                         if (len) {
 788                                 if (enc)
 789                                         gcm_tfm->enc_update(aes_ctx, data,
 790                                                              src, src, len);
 791                                 else
 792                                         gcm_tfm->dec_update(aes_ctx, data,
 793                                                              src, src, len);
 794                         }
 795                         left -= len;
 796                         scatterwalk_unmap(src);
 797                         scatterwalk_advance(&src_sg_walk, len);
 798                         scatterwalk_done(&src_sg_walk, 1, left);
 799                 }
 800         }
 801         gcm_tfm->finalize(aes_ctx, data, authTag, auth_tag_len);
 802         kernel_fpu_end();
 803
 804         if (!assocmem)
 805                 scatterwalk_unmap(assoc);
 806         else
 807                 kfree(assocmem);
 808
 809         if (!enc) {
 810                 u8 authTagMsg[16];
 811
 812                 /* Copy out original authTag */
 813                 scatterwalk_map_and_copy(authTagMsg, req->src,
 814                                          req->assoclen + req->cryptlen -
 815                                          auth_tag_len,
 816                                          auth_tag_len, 0);
 817
 818                 /* Compare generated tag with passed in tag. */
 819                 return crypto_memneq(authTagMsg, authTag, auth_tag_len) ?
 820                         -EBADMSG : 0;
 821         }
 822
 823         /* Copy in the authTag */
 824         scatterwalk_map_and_copy(authTag, req->dst,
 825                                  req->assoclen + req->cryptlen,
 826                                  auth_tag_len, 1);
 827
 828         return 0;
 829 }
 830
 831 static int gcmaes_encrypt(struct aead_request *req, unsigned int assoclen,
 832                           u8 *hash_subkey, u8 *iv, void *aes_ctx)
 833 {
 834         return gcmaes_crypt_by_sg(true, req, assoclen, hash_subkey, iv,
 835                                 aes_ctx);
 836 }
 837
 838 static int gcmaes_decrypt(struct aead_request *req, unsigned int assoclen,
 839                           u8 *hash_subkey, u8 *iv, void *aes_ctx)
 840 {
 841         return gcmaes_crypt_by_sg(false, req, assoclen, hash_subkey, iv,
 842                                 aes_ctx);
 843 }
 844
 845 static int helper_rfc4106_encrypt(struct aead_request *req)
 846 {
 847         struct crypto_aead *tfm = crypto_aead_reqtfm(req);
 848         struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(tfm);
 849         void *aes_ctx = &(ctx->aes_key_expanded);
 850         u8 ivbuf[16 + (AESNI_ALIGN - 8)] __aligned(8);
 851         u8 *iv = PTR_ALIGN(&ivbuf[0], AESNI_ALIGN);
 852         unsigned int i;
 853         __be32 counter = cpu_to_be32(1);
 854
 855         /* Assuming we are supporting rfc4106 64-bit extended */
 856         /* sequence numbers We need to have the AAD length equal */
 857         /* to 16 or 20 bytes */
 858         if (unlikely(req->assoclen != 16 && req->assoclen != 20))
 859                 return -EINVAL;
 860
 861         /* IV below built */
 862         for (i = 0; i < 4; i++)
 863                 *(iv+i) = ctx->nonce[i];
 864         for (i = 0; i < 8; i++)
 865                 *(iv+4+i) = req->iv[i];
 866         *((__be32 *)(iv+12)) = counter;
 867
 868         return gcmaes_encrypt(req, req->assoclen - 8, ctx->hash_subkey, iv,
 869                               aes_ctx);
 870 }
 871
 872 static int helper_rfc4106_decrypt(struct aead_request *req)
 873 {
 874         __be32 counter = cpu_to_be32(1);
 875         struct crypto_aead *tfm = crypto_aead_reqtfm(req);
 876         struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(tfm);
 877         void *aes_ctx = &(ctx->aes_key_expanded);
 878         u8 ivbuf[16 + (AESNI_ALIGN - 8)] __aligned(8);
 879         u8 *iv = PTR_ALIGN(&ivbuf[0], AESNI_ALIGN);
 880         unsigned int i;
 881
 882         if (unlikely(req->assoclen != 16 && req->assoclen != 20))
 883                 return -EINVAL;
 884
 885         /* Assuming we are supporting rfc4106 64-bit extended */
 886         /* sequence numbers We need to have the AAD length */
 887         /* equal to 16 or 20 bytes */
 888
 889         /* IV below built */
 890         for (i = 0; i < 4; i++)
 891                 *(iv+i) = ctx->nonce[i];
 892         for (i = 0; i < 8; i++)
 893                 *(iv+4+i) = req->iv[i];
 894         *((__be32 *)(iv+12)) = counter;
 895
 896         return gcmaes_decrypt(req, req->assoclen - 8, ctx->hash_subkey, iv,
 897                               aes_ctx);
 898 }
 899 #endif
 900
 901 static struct crypto_alg aesni_cipher_alg = {
 902         .cra_name               = "aes",
 903         .cra_driver_name        = "aes-aesni",
 904         .cra_priority           = 300,
 905         .cra_flags              = CRYPTO_ALG_TYPE_CIPHER,
 906         .cra_blocksize          = AES_BLOCK_SIZE,
 907         .cra_ctxsize            = CRYPTO_AES_CTX_SIZE,
 908         .cra_module             = THIS_MODULE,
 909         .cra_u  = {
 910                 .cipher = {
 911                         .cia_min_keysize        = AES_MIN_KEY_SIZE,
 912                         .cia_max_keysize        = AES_MAX_KEY_SIZE,
 913                         .cia_setkey             = aes_set_key,
 914                         .cia_encrypt            = aesni_encrypt,
 915                         .cia_decrypt            = aesni_decrypt
 916                 }
 917         }
 918 };
 919
 920 static struct skcipher_alg aesni_skciphers[] = {
 921         {
 922                 .base = {
 923                         .cra_name               = "__ecb(aes)",
 924                         .cra_driver_name        = "__ecb-aes-aesni",
 925                         .cra_priority           = 400,
 926                         .cra_flags              = CRYPTO_ALG_INTERNAL,
 927                         .cra_blocksize          = AES_BLOCK_SIZE,
 928                         .cra_ctxsize            = CRYPTO_AES_CTX_SIZE,
 929                         .cra_module             = THIS_MODULE,
 930                 },
 931                 .min_keysize    = AES_MIN_KEY_SIZE,
 932                 .max_keysize    = AES_MAX_KEY_SIZE,
 933                 .setkey         = aesni_skcipher_setkey,
 934                 .encrypt        = ecb_encrypt,
 935                 .decrypt        = ecb_decrypt,
 936         }, {
 937                 .base = {
 938                         .cra_name               = "__cbc(aes)",
 939                         .cra_driver_name        = "__cbc-aes-aesni",
 940                         .cra_priority           = 400,
 941                         .cra_flags              = CRYPTO_ALG_INTERNAL,
 942                         .cra_blocksize          = AES_BLOCK_SIZE,
 943                         .cra_ctxsize            = CRYPTO_AES_CTX_SIZE,
 944                         .cra_module             = THIS_MODULE,
 945                 },
 946                 .min_keysize    = AES_MIN_KEY_SIZE,
 947                 .max_keysize    = AES_MAX_KEY_SIZE,
 948                 .ivsize         = AES_BLOCK_SIZE,
 949                 .setkey         = aesni_skcipher_setkey,
 950                 .encrypt        = cbc_encrypt,
 951                 .decrypt        = cbc_decrypt,
 952 #ifdef CONFIG_X86_64
 953         }, {
 954                 .base = {
 955                         .cra_name               = "__ctr(aes)",
 956                         .cra_driver_name        = "__ctr-aes-aesni",
 957                         .cra_priority           = 400,
 958                         .cra_flags              = CRYPTO_ALG_INTERNAL,
 959                         .cra_blocksize          = 1,
 960                         .cra_ctxsize            = CRYPTO_AES_CTX_SIZE,
 961                         .cra_module             = THIS_MODULE,
 962                 },
 963                 .min_keysize    = AES_MIN_KEY_SIZE,
 964                 .max_keysize    = AES_MAX_KEY_SIZE,
 965                 .ivsize         = AES_BLOCK_SIZE,
 966                 .chunksize      = AES_BLOCK_SIZE,
 967                 .setkey         = aesni_skcipher_setkey,
 968                 .encrypt        = ctr_crypt,
 969                 .decrypt        = ctr_crypt,
 970         }, {
 971                 .base = {
 972                         .cra_name               = "__xts(aes)",
 973                         .cra_driver_name        = "__xts-aes-aesni",
 974                         .cra_priority           = 401,
 975                         .cra_flags              = CRYPTO_ALG_INTERNAL,
 976                         .cra_blocksize          = AES_BLOCK_SIZE,
 977                         .cra_ctxsize            = XTS_AES_CTX_SIZE,
 978                         .cra_module             = THIS_MODULE,
 979                 },
 980                 .min_keysize    = 2 * AES_MIN_KEY_SIZE,
 981                 .max_keysize    = 2 * AES_MAX_KEY_SIZE,
 982                 .ivsize         = AES_BLOCK_SIZE,
 983                 .setkey         = xts_aesni_setkey,
 984                 .encrypt        = xts_encrypt,
 985                 .decrypt        = xts_decrypt,
 986 #endif
 987         }
 988 };
 989
 990 static
 991 struct simd_skcipher_alg *aesni_simd_skciphers[ARRAY_SIZE(aesni_skciphers)];
 992
 993 #ifdef CONFIG_X86_64
 994 static int generic_gcmaes_set_key(struct crypto_aead *aead, const u8 *key,
 995                                   unsigned int key_len)
 996 {
 997         struct generic_gcmaes_ctx *ctx = generic_gcmaes_ctx_get(aead);
 998
 999         return aes_set_key_common(crypto_aead_tfm(aead),
1000                                   &ctx->aes_key_expanded, key, key_len) ?:
1001                rfc4106_set_hash_subkey(ctx->hash_subkey, key, key_len);
1002 }
1003
1004 static int generic_gcmaes_encrypt(struct aead_request *req)
1005 {
1006         struct crypto_aead *tfm = crypto_aead_reqtfm(req);
1007         struct generic_gcmaes_ctx *ctx = generic_gcmaes_ctx_get(tfm);
1008         void *aes_ctx = &(ctx->aes_key_expanded);
1009         u8 ivbuf[16 + (AESNI_ALIGN - 8)] __aligned(8);
1010         u8 *iv = PTR_ALIGN(&ivbuf[0], AESNI_ALIGN);
1011         __be32 counter = cpu_to_be32(1);
1012
1013         memcpy(iv, req->iv, 12);
1014         *((__be32 *)(iv+12)) = counter;
1015
1016         return gcmaes_encrypt(req, req->assoclen, ctx->hash_subkey, iv,
1017                               aes_ctx);
1018 }
1019
1020 static int generic_gcmaes_decrypt(struct aead_request *req)
1021 {
1022         __be32 counter = cpu_to_be32(1);
1023         struct crypto_aead *tfm = crypto_aead_reqtfm(req);
1024         struct generic_gcmaes_ctx *ctx = generic_gcmaes_ctx_get(tfm);
1025         void *aes_ctx = &(ctx->aes_key_expanded);
1026         u8 ivbuf[16 + (AESNI_ALIGN - 8)] __aligned(8);
1027         u8 *iv = PTR_ALIGN(&ivbuf[0], AESNI_ALIGN);
1028
1029         memcpy(iv, req->iv, 12);
1030         *((__be32 *)(iv+12)) = counter;
1031
1032         return gcmaes_decrypt(req, req->assoclen, ctx->hash_subkey, iv,
1033                               aes_ctx);
1034 }
1035
1036 static struct aead_alg aesni_aeads[] = { {
1037         .setkey                 = common_rfc4106_set_key,
1038         .setauthsize            = common_rfc4106_set_authsize,
1039         .encrypt                = helper_rfc4106_encrypt,
1040         .decrypt                = helper_rfc4106_decrypt,
1041         .ivsize                 = GCM_RFC4106_IV_SIZE,
1042         .maxauthsize            = 16,
1043         .base = {
1044                 .cra_name               = "__rfc4106(gcm(aes))",
1045                 .cra_driver_name        = "__rfc4106-gcm-aesni",
1046                 .cra_priority           = 400,
1047                 .cra_flags              = CRYPTO_ALG_INTERNAL,
1048                 .cra_blocksize          = 1,
1049                 .cra_ctxsize            = sizeof(struct aesni_rfc4106_gcm_ctx),
1050                 .cra_alignmask          = AESNI_ALIGN - 1,
1051                 .cra_module             = THIS_MODULE,
1052         },
1053 }, {
1054         .setkey                 = generic_gcmaes_set_key,
1055         .setauthsize            = generic_gcmaes_set_authsize,
1056         .encrypt                = generic_gcmaes_encrypt,
1057         .decrypt                = generic_gcmaes_decrypt,
1058         .ivsize                 = GCM_AES_IV_SIZE,
1059         .maxauthsize            = 16,
1060         .base = {
1061                 .cra_name               = "__gcm(aes)",
1062                 .cra_driver_name        = "__generic-gcm-aesni",
1063                 .cra_priority           = 400,
1064                 .cra_flags              = CRYPTO_ALG_INTERNAL,
1065                 .cra_blocksize          = 1,
1066                 .cra_ctxsize            = sizeof(struct generic_gcmaes_ctx),
1067                 .cra_alignmask          = AESNI_ALIGN - 1,
1068                 .cra_module             = THIS_MODULE,
1069         },
1070 } };
1071 #else
1072 static struct aead_alg aesni_aeads[0];
1073 #endif
1074
1075 static struct simd_aead_alg *aesni_simd_aeads[ARRAY_SIZE(aesni_aeads)];
1076
1077 static const struct x86_cpu_id aesni_cpu_id[] = {
1078         X86_FEATURE_MATCH(X86_FEATURE_AES),
1079         {}
1080 };
1081 MODULE_DEVICE_TABLE(x86cpu, aesni_cpu_id);
1082
1083 static int __init aesni_init(void)
1084 {
1085         int err;
1086
1087         if (!x86_match_cpu(aesni_cpu_id))
1088                 return -ENODEV;
1089 #ifdef CONFIG_X86_64
1090 #ifdef CONFIG_AS_AVX2
1091         if (boot_cpu_has(X86_FEATURE_AVX2)) {
1092                 pr_info("AVX2 version of gcm_enc/dec engaged.\n");
1093                 aesni_gcm_tfm = &aesni_gcm_tfm_avx_gen4;
1094         } else
1095 #endif
1096 #ifdef CONFIG_AS_AVX
1097         if (boot_cpu_has(X86_FEATURE_AVX)) {
1098                 pr_info("AVX version of gcm_enc/dec engaged.\n");
1099                 aesni_gcm_tfm = &aesni_gcm_tfm_avx_gen2;
1100         } else
1101 #endif
1102         {
1103                 pr_info("SSE version of gcm_enc/dec engaged.\n");
1104                 aesni_gcm_tfm = &aesni_gcm_tfm_sse;
1105         }
1106         aesni_ctr_enc_tfm = aesni_ctr_enc;
1107 #ifdef CONFIG_AS_AVX
1108         if (boot_cpu_has(X86_FEATURE_AVX)) {
1109                 /* optimize performance of ctr mode encryption transform */
1110                 aesni_ctr_enc_tfm = aesni_ctr_enc_avx_tfm;
1111                 pr_info("AES CTR mode by8 optimization enabled\n");
1112         }
1113 #endif
1114 #endif
1115
1116         err = crypto_register_alg(&aesni_cipher_alg);
1117         if (err)
1118                 return err;
1119
1120         err = simd_register_skciphers_compat(aesni_skciphers,
1121                                              ARRAY_SIZE(aesni_skciphers),
1122                                              aesni_simd_skciphers);
1123         if (err)
1124                 goto unregister_cipher;
1125
1126         err = simd_register_aeads_compat(aesni_aeads, ARRAY_SIZE(aesni_aeads),
1127                                          aesni_simd_aeads);
1128         if (err)
1129                 goto unregister_skciphers;
1130
1131         return 0;
1132
1133 unregister_skciphers:
1134         simd_unregister_skciphers(aesni_skciphers, ARRAY_SIZE(aesni_skciphers),
1135                                   aesni_simd_skciphers);
1136 unregister_cipher:
1137         crypto_unregister_alg(&aesni_cipher_alg);
1138         return err;
1139 }
1140
1141 static void __exit aesni_exit(void)
1142 {
1143         simd_unregister_aeads(aesni_aeads, ARRAY_SIZE(aesni_aeads),
1144                               aesni_simd_aeads);
1145         simd_unregister_skciphers(aesni_skciphers, ARRAY_SIZE(aesni_skciphers),
1146                                   aesni_simd_skciphers);
1147         crypto_unregister_alg(&aesni_cipher_alg);
1148 }
1149
1150 late_initcall(aesni_init);
1151 module_exit(aesni_exit);
1152
1153 MODULE_DESCRIPTION("Rijndael (AES) Cipher Algorithm, Intel AES-NI instructions optimized");
1154 MODULE_LICENSE("GPL");
1155 MODULE_ALIAS_CRYPTO("aes");