hw/virtio/virtio-crypto.c

   1 /*
   2  * Virtio crypto Support
   3  *
   4  * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
   5  *
   6  * Authors:
   7  *    Gonglei <arei.gonglei@huawei.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2 or
  10  * (at your option) any later version.  See the COPYING file in the
  11  * top-level directory.
  12  */
  13
  14 #include "qemu/osdep.h"
  15 #include "qemu/iov.h"
  16 #include "qemu/main-loop.h"
  17 #include "qemu/module.h"
  18 #include "qapi/error.h"
  19 #include "qemu/error-report.h"
  20
  21 #include "hw/virtio/virtio.h"
  22 #include "hw/virtio/virtio-crypto.h"
  23 #include "hw/qdev-properties.h"
  24 #include "hw/virtio/virtio-access.h"
  25 #include "standard-headers/linux/virtio_ids.h"
  26 #include "sysemu/cryptodev-vhost.h"
  27
  28 #define VIRTIO_CRYPTO_VM_VERSION 1
  29
  30 typedef struct VirtIOCryptoSessionReq {
  31     VirtIODevice *vdev;
  32     VirtQueue *vq;
  33     VirtQueueElement *elem;
  34     CryptoDevBackendSessionInfo info;
  35     CryptoDevCompletionFunc cb;
  36 } VirtIOCryptoSessionReq;
  37
  38 static void virtio_crypto_free_create_session_req(VirtIOCryptoSessionReq *sreq)
  39 {
  40     switch (sreq->info.op_code) {
  41     case VIRTIO_CRYPTO_CIPHER_CREATE_SESSION:
  42         g_free(sreq->info.u.sym_sess_info.cipher_key);
  43         g_free(sreq->info.u.sym_sess_info.auth_key);
  44         break;
  45
  46     case VIRTIO_CRYPTO_AKCIPHER_CREATE_SESSION:
  47         g_free(sreq->info.u.asym_sess_info.key);
  48         break;
  49
  50     case VIRTIO_CRYPTO_CIPHER_DESTROY_SESSION:
  51     case VIRTIO_CRYPTO_HASH_DESTROY_SESSION:
  52     case VIRTIO_CRYPTO_MAC_DESTROY_SESSION:
  53     case VIRTIO_CRYPTO_AEAD_DESTROY_SESSION:
  54     case VIRTIO_CRYPTO_AKCIPHER_DESTROY_SESSION:
  55         break;
  56
  57     default:
  58         error_report("Unknown opcode: %u", sreq->info.op_code);
  59     }
  60     g_free(sreq);
  61 }
  62
  63 /*
  64  * Transfer virtqueue index to crypto queue index.
  65  * The control virtqueue is after the data virtqueues
  66  * so the input value doesn't need to be adjusted
  67  */
  68 static inline int virtio_crypto_vq2q(int queue_index)
  69 {
  70     return queue_index;
  71 }
  72
  73 static int
  74 virtio_crypto_cipher_session_helper(VirtIODevice *vdev,
  75            CryptoDevBackendSymSessionInfo *info,
  76            struct virtio_crypto_cipher_session_para *cipher_para,
  77            struct iovec **iov, unsigned int *out_num)
  78 {
  79     VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev);
  80     unsigned int num = *out_num;
  81
  82     info->cipher_alg = ldl_le_p(&cipher_para->algo);
  83     info->key_len = ldl_le_p(&cipher_para->keylen);
  84     info->direction = ldl_le_p(&cipher_para->op);
  85     DPRINTF("cipher_alg=%" PRIu32 ", info->direction=%" PRIu32 "\n",
  86              info->cipher_alg, info->direction);
  87
  88     if (info->key_len > vcrypto->conf.max_cipher_key_len) {
  89         error_report("virtio-crypto length of cipher key is too big: %u",
  90                      info->key_len);
  91         return -VIRTIO_CRYPTO_ERR;
  92     }
  93     /* Get cipher key */
  94     if (info->key_len > 0) {
  95         size_t s;
  96         DPRINTF("keylen=%" PRIu32 "\n", info->key_len);
  97
  98         info->cipher_key = g_malloc(info->key_len);
  99         s = iov_to_buf(*iov, num, 0, info->cipher_key, info->key_len);
 100         if (unlikely(s != info->key_len)) {
 101             virtio_error(vdev, "virtio-crypto cipher key incorrect");
 102             return -EFAULT;
 103         }
 104         iov_discard_front(iov, &num, info->key_len);
 105         *out_num = num;
 106     }
 107
 108     return 0;
 109 }
 110
 111 static int
 112 virtio_crypto_create_sym_session(VirtIOCrypto *vcrypto,
 113                struct virtio_crypto_sym_create_session_req *sess_req,
 114                uint32_t queue_id,
 115                uint32_t opcode,
 116                struct iovec *iov, unsigned int out_num,
 117                VirtIOCryptoSessionReq *sreq)
 118 {
 119     VirtIODevice *vdev = VIRTIO_DEVICE(vcrypto);
 120     CryptoDevBackendSymSessionInfo *sym_info = &sreq->info.u.sym_sess_info;
 121     int queue_index;
 122     uint32_t op_type;
 123     int ret;
 124
 125     op_type = ldl_le_p(&sess_req->op_type);
 126     sreq->info.op_code = opcode;
 127
 128     sym_info = &sreq->info.u.sym_sess_info;
 129     sym_info->op_type = op_type;
 130
 131     if (op_type == VIRTIO_CRYPTO_SYM_OP_CIPHER) {
 132         ret = virtio_crypto_cipher_session_helper(vdev, sym_info,
 133                            &sess_req->u.cipher.para,
 134                            &iov, &out_num);
 135         if (ret < 0) {
 136             return ret;
 137         }
 138     } else if (op_type == VIRTIO_CRYPTO_SYM_OP_ALGORITHM_CHAINING) {
 139         size_t s;
 140         /* cipher part */
 141         ret = virtio_crypto_cipher_session_helper(vdev, sym_info,
 142                            &sess_req->u.chain.para.cipher_param,
 143                            &iov, &out_num);
 144         if (ret < 0) {
 145             return ret;
 146         }
 147         /* hash part */
 148         sym_info->alg_chain_order = ldl_le_p(
 149                                      &sess_req->u.chain.para.alg_chain_order);
 150         sym_info->add_len = ldl_le_p(&sess_req->u.chain.para.aad_len);
 151         sym_info->hash_mode = ldl_le_p(&sess_req->u.chain.para.hash_mode);
 152         if (sym_info->hash_mode == VIRTIO_CRYPTO_SYM_HASH_MODE_AUTH) {
 153             sym_info->hash_alg =
 154                 ldl_le_p(&sess_req->u.chain.para.u.mac_param.algo);
 155             sym_info->auth_key_len = ldl_le_p(
 156                              &sess_req->u.chain.para.u.mac_param.auth_key_len);
 157             sym_info->hash_result_len = ldl_le_p(
 158                            &sess_req->u.chain.para.u.mac_param.hash_result_len);
 159             if (sym_info->auth_key_len > vcrypto->conf.max_auth_key_len) {
 160                 error_report("virtio-crypto length of auth key is too big: %u",
 161                              sym_info->auth_key_len);
 162                 return -VIRTIO_CRYPTO_ERR;
 163             }
 164             /* get auth key */
 165             if (sym_info->auth_key_len > 0) {
 166                 sym_info->auth_key = g_malloc(sym_info->auth_key_len);
 167                 s = iov_to_buf(iov, out_num, 0, sym_info->auth_key,
 168                                sym_info->auth_key_len);
 169                 if (unlikely(s != sym_info->auth_key_len)) {
 170                     virtio_error(vdev,
 171                           "virtio-crypto authenticated key incorrect");
 172                     return -EFAULT;
 173                 }
 174                 iov_discard_front(&iov, &out_num, sym_info->auth_key_len);
 175             }
 176         } else if (sym_info->hash_mode == VIRTIO_CRYPTO_SYM_HASH_MODE_PLAIN) {
 177             sym_info->hash_alg = ldl_le_p(
 178                              &sess_req->u.chain.para.u.hash_param.algo);
 179             sym_info->hash_result_len = ldl_le_p(
 180                         &sess_req->u.chain.para.u.hash_param.hash_result_len);
 181         } else {
 182             /* VIRTIO_CRYPTO_SYM_HASH_MODE_NESTED */
 183             error_report("unsupported hash mode");
 184             return -VIRTIO_CRYPTO_NOTSUPP;
 185         }
 186     } else {
 187         /* VIRTIO_CRYPTO_SYM_OP_NONE */
 188         error_report("unsupported cipher op_type: VIRTIO_CRYPTO_SYM_OP_NONE");
 189         return -VIRTIO_CRYPTO_NOTSUPP;
 190     }
 191
 192     queue_index = virtio_crypto_vq2q(queue_id);
 193     return cryptodev_backend_create_session(vcrypto->cryptodev, &sreq->info,
 194                                             queue_index, sreq->cb, sreq);
 195 }
 196
 197 static int
 198 virtio_crypto_create_asym_session(VirtIOCrypto *vcrypto,
 199                struct virtio_crypto_akcipher_create_session_req *sess_req,
 200                uint32_t queue_id, uint32_t opcode,
 201                struct iovec *iov, unsigned int out_num,
 202                VirtIOCryptoSessionReq *sreq)
 203 {
 204     VirtIODevice *vdev = VIRTIO_DEVICE(vcrypto);
 205     CryptoDevBackendAsymSessionInfo *asym_info = &sreq->info.u.asym_sess_info;
 206     int queue_index;
 207     uint32_t algo, keytype, keylen;
 208
 209     algo = ldl_le_p(&sess_req->para.algo);
 210     keytype = ldl_le_p(&sess_req->para.keytype);
 211     keylen = ldl_le_p(&sess_req->para.keylen);
 212
 213     if ((keytype != VIRTIO_CRYPTO_AKCIPHER_KEY_TYPE_PUBLIC)
 214          && (keytype != VIRTIO_CRYPTO_AKCIPHER_KEY_TYPE_PRIVATE)) {
 215         error_report("unsupported asym keytype: %d", keytype);
 216         return -VIRTIO_CRYPTO_NOTSUPP;
 217     }
 218
 219     if (keylen) {
 220         asym_info->key = g_malloc(keylen);
 221         if (iov_to_buf(iov, out_num, 0, asym_info->key, keylen) != keylen) {
 222             virtio_error(vdev, "virtio-crypto asym key incorrect");
 223             return -EFAULT;
 224         }
 225         iov_discard_front(&iov, &out_num, keylen);
 226     }
 227
 228     sreq->info.op_code = opcode;
 229     asym_info = &sreq->info.u.asym_sess_info;
 230     asym_info->algo = algo;
 231     asym_info->keytype = keytype;
 232     asym_info->keylen = keylen;
 233     switch (asym_info->algo) {
 234     case VIRTIO_CRYPTO_AKCIPHER_RSA:
 235         asym_info->u.rsa.padding_algo =
 236             ldl_le_p(&sess_req->para.u.rsa.padding_algo);
 237         asym_info->u.rsa.hash_algo =
 238             ldl_le_p(&sess_req->para.u.rsa.hash_algo);
 239         break;
 240
 241     /* TODO DSA&ECDSA handling */
 242
 243     default:
 244         return -VIRTIO_CRYPTO_ERR;
 245     }
 246
 247     queue_index = virtio_crypto_vq2q(queue_id);
 248     return cryptodev_backend_create_session(vcrypto->cryptodev, &sreq->info,
 249                                             queue_index, sreq->cb, sreq);
 250 }
 251
 252 static int
 253 virtio_crypto_handle_close_session(VirtIOCrypto *vcrypto,
 254          struct virtio_crypto_destroy_session_req *close_sess_req,
 255          uint32_t queue_id,
 256          VirtIOCryptoSessionReq *sreq)
 257 {
 258     uint64_t session_id;
 259
 260     session_id = ldq_le_p(&close_sess_req->session_id);
 261     DPRINTF("close session, id=%" PRIu64 "\n", session_id);
 262
 263     return cryptodev_backend_close_session(
 264                 vcrypto->cryptodev, session_id, queue_id, sreq->cb, sreq);
 265 }
 266
 267 static void virtio_crypto_create_session_completion(void *opaque, int ret)
 268 {
 269     VirtIOCryptoSessionReq *sreq = (VirtIOCryptoSessionReq *)opaque;
 270     VirtQueue *vq = sreq->vq;
 271     VirtQueueElement *elem = sreq->elem;
 272     VirtIODevice *vdev = sreq->vdev;
 273     struct virtio_crypto_session_input input;
 274     struct iovec *in_iov = elem->in_sg;
 275     unsigned in_num = elem->in_num;
 276     size_t s;
 277
 278     memset(&input, 0, sizeof(input));
 279     /* Serious errors, need to reset virtio crypto device */
 280     if (ret == -EFAULT) {
 281         virtqueue_detach_element(vq, elem, 0);
 282         goto out;
 283     } else if (ret == -VIRTIO_CRYPTO_NOTSUPP) {
 284         stl_le_p(&input.status, VIRTIO_CRYPTO_NOTSUPP);
 285     } else if (ret == -VIRTIO_CRYPTO_KEY_REJECTED) {
 286         stl_le_p(&input.status, VIRTIO_CRYPTO_KEY_REJECTED);
 287     } else if (ret != VIRTIO_CRYPTO_OK) {
 288         stl_le_p(&input.status, VIRTIO_CRYPTO_ERR);
 289     } else {
 290         /* Set the session id */
 291         stq_le_p(&input.session_id, sreq->info.session_id);
 292         stl_le_p(&input.status, VIRTIO_CRYPTO_OK);
 293     }
 294
 295     s = iov_from_buf(in_iov, in_num, 0, &input, sizeof(input));
 296     if (unlikely(s != sizeof(input))) {
 297         virtio_error(vdev, "virtio-crypto input incorrect");
 298         virtqueue_detach_element(vq, elem, 0);
 299         goto out;
 300     }
 301     virtqueue_push(vq, elem, sizeof(input));
 302     virtio_notify(vdev, vq);
 303
 304 out:
 305     g_free(elem);
 306     virtio_crypto_free_create_session_req(sreq);
 307 }
 308
 309 static void virtio_crypto_destroy_session_completion(void *opaque, int ret)
 310 {
 311     VirtIOCryptoSessionReq *sreq = (VirtIOCryptoSessionReq *)opaque;
 312     VirtQueue *vq = sreq->vq;
 313     VirtQueueElement *elem = sreq->elem;
 314     VirtIODevice *vdev = sreq->vdev;
 315     struct iovec *in_iov = elem->in_sg;
 316     unsigned in_num = elem->in_num;
 317     uint8_t status;
 318     size_t s;
 319
 320     if (ret < 0) {
 321         status = VIRTIO_CRYPTO_ERR;
 322     } else {
 323         status = VIRTIO_CRYPTO_OK;
 324     }
 325     s = iov_from_buf(in_iov, in_num, 0, &status, sizeof(status));
 326     if (unlikely(s != sizeof(status))) {
 327         virtio_error(vdev, "virtio-crypto status incorrect");
 328         virtqueue_detach_element(vq, elem, 0);
 329         goto out;
 330     }
 331     virtqueue_push(vq, elem, sizeof(status));
 332     virtio_notify(vdev, vq);
 333
 334 out:
 335     g_free(elem);
 336     g_free(sreq);
 337 }
 338
 339 static void virtio_crypto_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq)
 340 {
 341     VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev);
 342     struct virtio_crypto_op_ctrl_req ctrl;
 343     VirtQueueElement *elem;
 344     VirtIOCryptoSessionReq *sreq;
 345     unsigned out_num;
 346     unsigned in_num;
 347     uint32_t queue_id;
 348     uint32_t opcode;
 349     struct virtio_crypto_session_input input;
 350     size_t s;
 351     int ret;
 352     struct iovec *out_iov;
 353     struct iovec *in_iov;
 354
 355     for (;;) {
 356         g_autofree struct iovec *out_iov_copy = NULL;
 357
 358         elem = virtqueue_pop(vq, sizeof(VirtQueueElement));
 359         if (!elem) {
 360             break;
 361         }
 362         if (elem->out_num < 1 || elem->in_num < 1) {
 363             virtio_error(vdev, "virtio-crypto ctrl missing headers");
 364             virtqueue_detach_element(vq, elem, 0);
 365             g_free(elem);
 366             break;
 367         }
 368
 369         out_num = elem->out_num;
 370         out_iov_copy = g_memdup2(elem->out_sg, sizeof(out_iov[0]) * out_num);
 371         out_iov = out_iov_copy;
 372
 373         in_num = elem->in_num;
 374         in_iov = elem->in_sg;
 375
 376         if (unlikely(iov_to_buf(out_iov, out_num, 0, &ctrl, sizeof(ctrl))
 377                     != sizeof(ctrl))) {
 378             virtio_error(vdev, "virtio-crypto request ctrl_hdr too short");
 379             virtqueue_detach_element(vq, elem, 0);
 380             g_free(elem);
 381             break;
 382         }
 383         iov_discard_front(&out_iov, &out_num, sizeof(ctrl));
 384
 385         opcode = ldl_le_p(&ctrl.header.opcode);
 386         queue_id = ldl_le_p(&ctrl.header.queue_id);
 387
 388         sreq = g_new0(VirtIOCryptoSessionReq, 1);
 389         sreq->vdev = vdev;
 390         sreq->vq = vq;
 391         sreq->elem = elem;
 392
 393         switch (opcode) {
 394         case VIRTIO_CRYPTO_CIPHER_CREATE_SESSION:
 395             sreq->cb = virtio_crypto_create_session_completion;
 396             ret = virtio_crypto_create_sym_session(vcrypto,
 397                             &ctrl.u.sym_create_session,
 398                             queue_id, opcode,
 399                             out_iov, out_num,
 400                             sreq);
 401             if (ret < 0) {
 402                 virtio_crypto_create_session_completion(sreq, ret);
 403             }
 404             break;
 405
 406         case VIRTIO_CRYPTO_AKCIPHER_CREATE_SESSION:
 407             sreq->cb = virtio_crypto_create_session_completion;
 408             ret = virtio_crypto_create_asym_session(vcrypto,
 409                              &ctrl.u.akcipher_create_session,
 410                              queue_id, opcode,
 411                              out_iov, out_num,
 412                              sreq);
 413             if (ret < 0) {
 414                 virtio_crypto_create_session_completion(sreq, ret);
 415             }
 416             break;
 417
 418         case VIRTIO_CRYPTO_CIPHER_DESTROY_SESSION:
 419         case VIRTIO_CRYPTO_HASH_DESTROY_SESSION:
 420         case VIRTIO_CRYPTO_MAC_DESTROY_SESSION:
 421         case VIRTIO_CRYPTO_AEAD_DESTROY_SESSION:
 422         case VIRTIO_CRYPTO_AKCIPHER_DESTROY_SESSION:
 423             sreq->cb = virtio_crypto_destroy_session_completion;
 424             ret = virtio_crypto_handle_close_session(vcrypto,
 425                    &ctrl.u.destroy_session, queue_id,
 426                    sreq);
 427             if (ret < 0) {
 428                 virtio_crypto_destroy_session_completion(sreq, ret);
 429             }
 430             break;
 431
 432         case VIRTIO_CRYPTO_HASH_CREATE_SESSION:
 433         case VIRTIO_CRYPTO_MAC_CREATE_SESSION:
 434         case VIRTIO_CRYPTO_AEAD_CREATE_SESSION:
 435         default:
 436             memset(&input, 0, sizeof(input));
 437             error_report("virtio-crypto unsupported ctrl opcode: %d", opcode);
 438             stl_le_p(&input.status, VIRTIO_CRYPTO_NOTSUPP);
 439             s = iov_from_buf(in_iov, in_num, 0, &input, sizeof(input));
 440             if (unlikely(s != sizeof(input))) {
 441                 virtio_error(vdev, "virtio-crypto input incorrect");
 442                 virtqueue_detach_element(vq, elem, 0);
 443             } else {
 444                 virtqueue_push(vq, elem, sizeof(input));
 445                 virtio_notify(vdev, vq);
 446             }
 447             g_free(sreq);
 448             g_free(elem);
 449
 450             break;
 451         } /* end switch case */
 452
 453     } /* end for loop */
 454 }
 455
 456 static void virtio_crypto_init_request(VirtIOCrypto *vcrypto, VirtQueue *vq,
 457                                 VirtIOCryptoReq *req)
 458 {
 459     req->vcrypto = vcrypto;
 460     req->vq = vq;
 461     req->in = NULL;
 462     req->in_iov = NULL;
 463     req->in_num = 0;
 464     req->in_len = 0;
 465     req->flags = CRYPTODEV_BACKEND_ALG__MAX;
 466     memset(&req->op_info, 0x00, sizeof(req->op_info));
 467 }
 468
 469 static void virtio_crypto_free_request(VirtIOCryptoReq *req)
 470 {
 471     if (!req) {
 472         return;
 473     }
 474
 475     if (req->flags == CRYPTODEV_BACKEND_ALG_SYM) {
 476         size_t max_len;
 477         CryptoDevBackendSymOpInfo *op_info = req->op_info.u.sym_op_info;
 478
 479         max_len = op_info->iv_len +
 480                   op_info->aad_len +
 481                   op_info->src_len +
 482                   op_info->dst_len +
 483                   op_info->digest_result_len;
 484
 485         /* Zeroize and free request data structure */
 486         memset(op_info, 0, sizeof(*op_info) + max_len);
 487         g_free(op_info);
 488     } else if (req->flags == CRYPTODEV_BACKEND_ALG_ASYM) {
 489         CryptoDevBackendAsymOpInfo *op_info = req->op_info.u.asym_op_info;
 490         if (op_info) {
 491             g_free(op_info->src);
 492             g_free(op_info->dst);
 493             memset(op_info, 0, sizeof(*op_info));
 494             g_free(op_info);
 495         }
 496     }
 497
 498     g_free(req->in_iov);
 499     g_free(req);
 500 }
 501
 502 static void
 503 virtio_crypto_sym_input_data_helper(VirtIODevice *vdev,
 504                 VirtIOCryptoReq *req,
 505                 uint32_t status,
 506                 CryptoDevBackendSymOpInfo *sym_op_info)
 507 {
 508     size_t s, len;
 509     struct iovec *in_iov = req->in_iov;
 510
 511     if (status != VIRTIO_CRYPTO_OK) {
 512         return;
 513     }
 514
 515     len = sym_op_info->src_len;
 516     /* Save the cipher result */
 517     s = iov_from_buf(in_iov, req->in_num, 0, sym_op_info->dst, len);
 518     if (s != len) {
 519         virtio_error(vdev, "virtio-crypto dest data incorrect");
 520         return;
 521     }
 522
 523     iov_discard_front(&in_iov, &req->in_num, len);
 524
 525     if (sym_op_info->op_type ==
 526                       VIRTIO_CRYPTO_SYM_OP_ALGORITHM_CHAINING) {
 527         /* Save the digest result */
 528         s = iov_from_buf(in_iov, req->in_num, 0,
 529                          sym_op_info->digest_result,
 530                          sym_op_info->digest_result_len);
 531         if (s != sym_op_info->digest_result_len) {
 532             virtio_error(vdev, "virtio-crypto digest result incorrect");
 533         }
 534     }
 535 }
 536
 537 static void
 538 virtio_crypto_akcipher_input_data_helper(VirtIODevice *vdev,
 539         VirtIOCryptoReq *req, int32_t status,
 540         CryptoDevBackendAsymOpInfo *asym_op_info)
 541 {
 542     size_t s, len;
 543     struct iovec *in_iov = req->in_iov;
 544
 545     if (status != VIRTIO_CRYPTO_OK) {
 546         return;
 547     }
 548
 549     len = asym_op_info->dst_len;
 550     if (!len) {
 551         return;
 552     }
 553
 554     s = iov_from_buf(in_iov, req->in_num, 0, asym_op_info->dst, len);
 555     if (s != len) {
 556         virtio_error(vdev, "virtio-crypto asym dest data incorrect");
 557         return;
 558     }
 559
 560     iov_discard_front(&in_iov, &req->in_num, len);
 561
 562     /* For akcipher, dst_len may be changed after operation */
 563     req->in_len = sizeof(struct virtio_crypto_inhdr) + asym_op_info->dst_len;
 564 }
 565
 566 static void virtio_crypto_req_complete(void *opaque, int ret)
 567 {
 568     VirtIOCryptoReq *req = (VirtIOCryptoReq *)opaque;
 569     VirtIOCrypto *vcrypto = req->vcrypto;
 570     VirtIODevice *vdev = VIRTIO_DEVICE(vcrypto);
 571     uint8_t status = -ret;
 572
 573     if (req->flags == CRYPTODEV_BACKEND_ALG_SYM) {
 574         virtio_crypto_sym_input_data_helper(vdev, req, status,
 575                                             req->op_info.u.sym_op_info);
 576     } else if (req->flags == CRYPTODEV_BACKEND_ALG_ASYM) {
 577         virtio_crypto_akcipher_input_data_helper(vdev, req, status,
 578                                              req->op_info.u.asym_op_info);
 579     }
 580     stb_p(&req->in->status, status);
 581     virtqueue_push(req->vq, &req->elem, req->in_len);
 582     virtio_notify(vdev, req->vq);
 583     virtio_crypto_free_request(req);
 584 }
 585
 586 static VirtIOCryptoReq *
 587 virtio_crypto_get_request(VirtIOCrypto *s, VirtQueue *vq)
 588 {
 589     VirtIOCryptoReq *req = virtqueue_pop(vq, sizeof(VirtIOCryptoReq));
 590
 591     if (req) {
 592         virtio_crypto_init_request(s, vq, req);
 593     }
 594     return req;
 595 }
 596
 597 static CryptoDevBackendSymOpInfo *
 598 virtio_crypto_sym_op_helper(VirtIODevice *vdev,
 599            struct virtio_crypto_cipher_para *cipher_para,
 600            struct virtio_crypto_alg_chain_data_para *alg_chain_para,
 601            struct iovec *iov, unsigned int out_num)
 602 {
 603     VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev);
 604     CryptoDevBackendSymOpInfo *op_info;
 605     uint32_t src_len = 0, dst_len = 0;
 606     uint32_t iv_len = 0;
 607     uint32_t aad_len = 0, hash_result_len = 0;
 608     uint32_t hash_start_src_offset = 0, len_to_hash = 0;
 609     uint32_t cipher_start_src_offset = 0, len_to_cipher = 0;
 610
 611     uint64_t max_len, curr_size = 0;
 612     size_t s;
 613
 614     /* Plain cipher */
 615     if (cipher_para) {
 616         iv_len = ldl_le_p(&cipher_para->iv_len);
 617         src_len = ldl_le_p(&cipher_para->src_data_len);
 618         dst_len = ldl_le_p(&cipher_para->dst_data_len);
 619     } else if (alg_chain_para) { /* Algorithm chain */
 620         iv_len = ldl_le_p(&alg_chain_para->iv_len);
 621         src_len = ldl_le_p(&alg_chain_para->src_data_len);
 622         dst_len = ldl_le_p(&alg_chain_para->dst_data_len);
 623
 624         aad_len = ldl_le_p(&alg_chain_para->aad_len);
 625         hash_result_len = ldl_le_p(&alg_chain_para->hash_result_len);
 626         hash_start_src_offset = ldl_le_p(
 627                          &alg_chain_para->hash_start_src_offset);
 628         cipher_start_src_offset = ldl_le_p(
 629                          &alg_chain_para->cipher_start_src_offset);
 630         len_to_cipher = ldl_le_p(&alg_chain_para->len_to_cipher);
 631         len_to_hash = ldl_le_p(&alg_chain_para->len_to_hash);
 632     } else {
 633         return NULL;
 634     }
 635
 636     max_len = (uint64_t)iv_len + aad_len + src_len + dst_len + hash_result_len;
 637     if (unlikely(max_len > vcrypto->conf.max_size)) {
 638         virtio_error(vdev, "virtio-crypto too big length");
 639         return NULL;
 640     }
 641
 642     op_info = g_malloc0(sizeof(CryptoDevBackendSymOpInfo) + max_len);
 643     op_info->iv_len = iv_len;
 644     op_info->src_len = src_len;
 645     op_info->dst_len = dst_len;
 646     op_info->aad_len = aad_len;
 647     op_info->digest_result_len = hash_result_len;
 648     op_info->hash_start_src_offset = hash_start_src_offset;
 649     op_info->len_to_hash = len_to_hash;
 650     op_info->cipher_start_src_offset = cipher_start_src_offset;
 651     op_info->len_to_cipher = len_to_cipher;
 652     /* Handle the initilization vector */
 653     if (op_info->iv_len > 0) {
 654         DPRINTF("iv_len=%" PRIu32 "\n", op_info->iv_len);
 655         op_info->iv = op_info->data + curr_size;
 656
 657         s = iov_to_buf(iov, out_num, 0, op_info->iv, op_info->iv_len);
 658         if (unlikely(s != op_info->iv_len)) {
 659             virtio_error(vdev, "virtio-crypto iv incorrect");
 660             goto err;
 661         }
 662         iov_discard_front(&iov, &out_num, op_info->iv_len);
 663         curr_size += op_info->iv_len;
 664     }
 665
 666     /* Handle additional authentication data if exists */
 667     if (op_info->aad_len > 0) {
 668         DPRINTF("aad_len=%" PRIu32 "\n", op_info->aad_len);
 669         op_info->aad_data = op_info->data + curr_size;
 670
 671         s = iov_to_buf(iov, out_num, 0, op_info->aad_data, op_info->aad_len);
 672         if (unlikely(s != op_info->aad_len)) {
 673             virtio_error(vdev, "virtio-crypto additional auth data incorrect");
 674             goto err;
 675         }
 676         iov_discard_front(&iov, &out_num, op_info->aad_len);
 677
 678         curr_size += op_info->aad_len;
 679     }
 680
 681     /* Handle the source data */
 682     if (op_info->src_len > 0) {
 683         DPRINTF("src_len=%" PRIu32 "\n", op_info->src_len);
 684         op_info->src = op_info->data + curr_size;
 685
 686         s = iov_to_buf(iov, out_num, 0, op_info->src, op_info->src_len);
 687         if (unlikely(s != op_info->src_len)) {
 688             virtio_error(vdev, "virtio-crypto source data incorrect");
 689             goto err;
 690         }
 691         iov_discard_front(&iov, &out_num, op_info->src_len);
 692
 693         curr_size += op_info->src_len;
 694     }
 695
 696     /* Handle the destination data */
 697     op_info->dst = op_info->data + curr_size;
 698     curr_size += op_info->dst_len;
 699
 700     DPRINTF("dst_len=%" PRIu32 "\n", op_info->dst_len);
 701
 702     /* Handle the hash digest result */
 703     if (hash_result_len > 0) {
 704         DPRINTF("hash_result_len=%" PRIu32 "\n", hash_result_len);
 705         op_info->digest_result = op_info->data + curr_size;
 706     }
 707
 708     return op_info;
 709
 710 err:
 711     g_free(op_info);
 712     return NULL;
 713 }
 714
 715 static int
 716 virtio_crypto_handle_sym_req(VirtIOCrypto *vcrypto,
 717                struct virtio_crypto_sym_data_req *req,
 718                CryptoDevBackendOpInfo *op_info,
 719                struct iovec *iov, unsigned int out_num)
 720 {
 721     VirtIODevice *vdev = VIRTIO_DEVICE(vcrypto);
 722     CryptoDevBackendSymOpInfo *sym_op_info;
 723     uint32_t op_type;
 724
 725     op_type = ldl_le_p(&req->op_type);
 726     if (op_type == VIRTIO_CRYPTO_SYM_OP_CIPHER) {
 727         sym_op_info = virtio_crypto_sym_op_helper(vdev, &req->u.cipher.para,
 728                                               NULL, iov, out_num);
 729         if (!sym_op_info) {
 730             return -EFAULT;
 731         }
 732     } else if (op_type == VIRTIO_CRYPTO_SYM_OP_ALGORITHM_CHAINING) {
 733         sym_op_info = virtio_crypto_sym_op_helper(vdev, NULL,
 734                                               &req->u.chain.para,
 735                                               iov, out_num);
 736         if (!sym_op_info) {
 737             return -EFAULT;
 738         }
 739     } else {
 740         /* VIRTIO_CRYPTO_SYM_OP_NONE */
 741         error_report("virtio-crypto unsupported cipher type");
 742         return -VIRTIO_CRYPTO_NOTSUPP;
 743     }
 744
 745     sym_op_info->op_type = op_type;
 746     op_info->u.sym_op_info = sym_op_info;
 747
 748     return 0;
 749 }
 750
 751 static int
 752 virtio_crypto_handle_asym_req(VirtIOCrypto *vcrypto,
 753                struct virtio_crypto_akcipher_data_req *req,
 754                CryptoDevBackendOpInfo *op_info,
 755                struct iovec *iov, unsigned int out_num)
 756 {
 757     VirtIODevice *vdev = VIRTIO_DEVICE(vcrypto);
 758     CryptoDevBackendAsymOpInfo *asym_op_info;
 759     uint32_t src_len;
 760     uint32_t dst_len;
 761     uint32_t len;
 762     uint8_t *src = NULL;
 763     uint8_t *dst = NULL;
 764
 765     asym_op_info = g_new0(CryptoDevBackendAsymOpInfo, 1);
 766     src_len = ldl_le_p(&req->para.src_data_len);
 767     dst_len = ldl_le_p(&req->para.dst_data_len);
 768
 769     if (src_len > 0) {
 770         src = g_malloc0(src_len);
 771         len = iov_to_buf(iov, out_num, 0, src, src_len);
 772         if (unlikely(len != src_len)) {
 773             virtio_error(vdev, "virtio-crypto asym src data incorrect"
 774                          "expected %u, actual %u", src_len, len);
 775             goto err;
 776         }
 777
 778         iov_discard_front(&iov, &out_num, src_len);
 779     }
 780
 781     if (dst_len > 0) {
 782         dst = g_malloc0(dst_len);
 783
 784         if (op_info->op_code == VIRTIO_CRYPTO_AKCIPHER_VERIFY) {
 785             len = iov_to_buf(iov, out_num, 0, dst, dst_len);
 786             if (unlikely(len != dst_len)) {
 787                 virtio_error(vdev, "virtio-crypto asym dst data incorrect"
 788                              "expected %u, actual %u", dst_len, len);
 789                 goto err;
 790             }
 791
 792             iov_discard_front(&iov, &out_num, dst_len);
 793         }
 794     }
 795
 796     asym_op_info->src_len = src_len;
 797     asym_op_info->dst_len = dst_len;
 798     asym_op_info->src = src;
 799     asym_op_info->dst = dst;
 800     op_info->u.asym_op_info = asym_op_info;
 801
 802     return 0;
 803
 804  err:
 805     g_free(asym_op_info);
 806     g_free(src);
 807     g_free(dst);
 808
 809     return -EFAULT;
 810 }
 811
 812 static int
 813 virtio_crypto_handle_request(VirtIOCryptoReq *request)
 814 {
 815     VirtIOCrypto *vcrypto = request->vcrypto;
 816     VirtIODevice *vdev = VIRTIO_DEVICE(vcrypto);
 817     VirtQueueElement *elem = &request->elem;
 818     int queue_index = virtio_crypto_vq2q(virtio_get_queue_index(request->vq));
 819     struct virtio_crypto_op_data_req req;
 820     int ret;
 821     g_autofree struct iovec *in_iov_copy = NULL;
 822     g_autofree struct iovec *out_iov_copy = NULL;
 823     struct iovec *in_iov;
 824     struct iovec *out_iov;
 825     unsigned in_num;
 826     unsigned out_num;
 827     uint32_t opcode;
 828     CryptoDevBackendOpInfo *op_info = &request->op_info;
 829
 830     if (elem->out_num < 1 || elem->in_num < 1) {
 831         virtio_error(vdev, "virtio-crypto dataq missing headers");
 832         return -1;
 833     }
 834
 835     out_num = elem->out_num;
 836     out_iov_copy = g_memdup2(elem->out_sg, sizeof(out_iov[0]) * out_num);
 837     out_iov = out_iov_copy;
 838
 839     in_num = elem->in_num;
 840     in_iov_copy = g_memdup2(elem->in_sg, sizeof(in_iov[0]) * in_num);
 841     in_iov = in_iov_copy;
 842
 843     if (unlikely(iov_to_buf(out_iov, out_num, 0, &req, sizeof(req))
 844                 != sizeof(req))) {
 845         virtio_error(vdev, "virtio-crypto request outhdr too short");
 846         return -1;
 847     }
 848     iov_discard_front(&out_iov, &out_num, sizeof(req));
 849
 850     if (in_iov[in_num - 1].iov_len <
 851             sizeof(struct virtio_crypto_inhdr)) {
 852         virtio_error(vdev, "virtio-crypto request inhdr too short");
 853         return -1;
 854     }
 855     /* We always touch the last byte, so just see how big in_iov is. */
 856     request->in_len = iov_size(in_iov, in_num);
 857     request->in = (void *)in_iov[in_num - 1].iov_base
 858               + in_iov[in_num - 1].iov_len
 859               - sizeof(struct virtio_crypto_inhdr);
 860     iov_discard_back(in_iov, &in_num, sizeof(struct virtio_crypto_inhdr));
 861
 862     /*
 863      * The length of operation result, including dest_data
 864      * and digest_result if exists.
 865      */
 866     request->in_num = in_num;
 867     request->in_iov = in_iov;
 868     /* now, we free the in_iov_copy inside virtio_crypto_free_request */
 869     in_iov_copy = NULL;
 870
 871     opcode = ldl_le_p(&req.header.opcode);
 872     op_info->session_id = ldq_le_p(&req.header.session_id);
 873     op_info->op_code = opcode;
 874
 875     switch (opcode) {
 876     case VIRTIO_CRYPTO_CIPHER_ENCRYPT:
 877     case VIRTIO_CRYPTO_CIPHER_DECRYPT:
 878         op_info->algtype = request->flags = CRYPTODEV_BACKEND_ALG_SYM;
 879         ret = virtio_crypto_handle_sym_req(vcrypto,
 880                          &req.u.sym_req, op_info,
 881                          out_iov, out_num);
 882         goto check_result;
 883
 884     case VIRTIO_CRYPTO_AKCIPHER_ENCRYPT:
 885     case VIRTIO_CRYPTO_AKCIPHER_DECRYPT:
 886     case VIRTIO_CRYPTO_AKCIPHER_SIGN:
 887     case VIRTIO_CRYPTO_AKCIPHER_VERIFY:
 888         op_info->algtype = request->flags = CRYPTODEV_BACKEND_ALG_ASYM;
 889         ret = virtio_crypto_handle_asym_req(vcrypto,
 890                          &req.u.akcipher_req, op_info,
 891                          out_iov, out_num);
 892
 893 check_result:
 894         /* Serious errors, need to reset virtio crypto device */
 895         if (ret == -EFAULT) {
 896             return -1;
 897         } else if (ret == -VIRTIO_CRYPTO_NOTSUPP) {
 898             virtio_crypto_req_complete(request, -VIRTIO_CRYPTO_NOTSUPP);
 899         } else {
 900             ret = cryptodev_backend_crypto_operation(vcrypto->cryptodev,
 901                                     request, queue_index,
 902                                     virtio_crypto_req_complete,
 903                                     request);
 904             if (ret < 0) {
 905                 virtio_crypto_req_complete(request, ret);
 906             }
 907         }
 908         break;
 909
 910     case VIRTIO_CRYPTO_HASH:
 911     case VIRTIO_CRYPTO_MAC:
 912     case VIRTIO_CRYPTO_AEAD_ENCRYPT:
 913     case VIRTIO_CRYPTO_AEAD_DECRYPT:
 914     default:
 915         error_report("virtio-crypto unsupported dataq opcode: %u",
 916                      opcode);
 917         virtio_crypto_req_complete(request, -VIRTIO_CRYPTO_NOTSUPP);
 918     }
 919
 920     return 0;
 921 }
 922
 923 static void virtio_crypto_handle_dataq(VirtIODevice *vdev, VirtQueue *vq)
 924 {
 925     VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev);
 926     VirtIOCryptoReq *req;
 927
 928     while ((req = virtio_crypto_get_request(vcrypto, vq))) {
 929         if (virtio_crypto_handle_request(req) < 0) {
 930             virtqueue_detach_element(req->vq, &req->elem, 0);
 931             virtio_crypto_free_request(req);
 932             break;
 933         }
 934     }
 935 }
 936
 937 static void virtio_crypto_dataq_bh(void *opaque)
 938 {
 939     VirtIOCryptoQueue *q = opaque;
 940     VirtIOCrypto *vcrypto = q->vcrypto;
 941     VirtIODevice *vdev = VIRTIO_DEVICE(vcrypto);
 942
 943     /* This happens when device was stopped but BH wasn't. */
 944     if (!vdev->vm_running) {
 945         return;
 946     }
 947
 948     /* Just in case the driver is not ready on more */
 949     if (unlikely(!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK))) {
 950         return;
 951     }
 952
 953     for (;;) {
 954         virtio_crypto_handle_dataq(vdev, q->dataq);
 955         virtio_queue_set_notification(q->dataq, 1);
 956
 957         /* Are we done or did the guest add more buffers? */
 958         if (virtio_queue_empty(q->dataq)) {
 959             break;
 960         }
 961
 962         virtio_queue_set_notification(q->dataq, 0);
 963     }
 964 }
 965
 966 static void
 967 virtio_crypto_handle_dataq_bh(VirtIODevice *vdev, VirtQueue *vq)
 968 {
 969     VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev);
 970     VirtIOCryptoQueue *q =
 971          &vcrypto->vqs[virtio_crypto_vq2q(virtio_get_queue_index(vq))];
 972
 973     /* This happens when device was stopped but VCPU wasn't. */
 974     if (!vdev->vm_running) {
 975         return;
 976     }
 977     virtio_queue_set_notification(vq, 0);
 978     qemu_bh_schedule(q->dataq_bh);
 979 }
 980
 981 static uint64_t virtio_crypto_get_features(VirtIODevice *vdev,
 982                                            uint64_t features,
 983                                            Error **errp)
 984 {
 985     return features;
 986 }
 987
 988 static void virtio_crypto_reset(VirtIODevice *vdev)
 989 {
 990     VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev);
 991     /* multiqueue is disabled by default */
 992     vcrypto->curr_queues = 1;
 993     if (!cryptodev_backend_is_ready(vcrypto->cryptodev)) {
 994         vcrypto->status &= ~VIRTIO_CRYPTO_S_HW_READY;
 995     } else {
 996         vcrypto->status |= VIRTIO_CRYPTO_S_HW_READY;
 997     }
 998 }
 999
1000 static void virtio_crypto_init_config(VirtIODevice *vdev)
1001 {
1002     VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev);
1003
1004     vcrypto->conf.crypto_services =
1005                      vcrypto->conf.cryptodev->conf.crypto_services;
1006     vcrypto->conf.cipher_algo_l =
1007                      vcrypto->conf.cryptodev->conf.cipher_algo_l;
1008     vcrypto->conf.cipher_algo_h =
1009                      vcrypto->conf.cryptodev->conf.cipher_algo_h;
1010     vcrypto->conf.hash_algo = vcrypto->conf.cryptodev->conf.hash_algo;
1011     vcrypto->conf.mac_algo_l = vcrypto->conf.cryptodev->conf.mac_algo_l;
1012     vcrypto->conf.mac_algo_h = vcrypto->conf.cryptodev->conf.mac_algo_h;
1013     vcrypto->conf.aead_algo = vcrypto->conf.cryptodev->conf.aead_algo;
1014     vcrypto->conf.akcipher_algo = vcrypto->conf.cryptodev->conf.akcipher_algo;
1015     vcrypto->conf.max_cipher_key_len =
1016                   vcrypto->conf.cryptodev->conf.max_cipher_key_len;
1017     vcrypto->conf.max_auth_key_len =
1018                   vcrypto->conf.cryptodev->conf.max_auth_key_len;
1019     vcrypto->conf.max_size = vcrypto->conf.cryptodev->conf.max_size;
1020 }
1021
1022 static void virtio_crypto_device_realize(DeviceState *dev, Error **errp)
1023 {
1024     VirtIODevice *vdev = VIRTIO_DEVICE(dev);
1025     VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(dev);
1026     int i;
1027
1028     vcrypto->cryptodev = vcrypto->conf.cryptodev;
1029     if (vcrypto->cryptodev == NULL) {
1030         error_setg(errp, "'cryptodev' parameter expects a valid object");
1031         return;
1032     } else if (cryptodev_backend_is_used(vcrypto->cryptodev)) {
1033         error_setg(errp, "can't use already used cryptodev backend: %s",
1034                    object_get_canonical_path_component(OBJECT(vcrypto->conf.cryptodev)));
1035         return;
1036     }
1037
1038     vcrypto->max_queues = MAX(vcrypto->cryptodev->conf.peers.queues, 1);
1039     if (vcrypto->max_queues + 1 > VIRTIO_QUEUE_MAX) {
1040         error_setg(errp, "Invalid number of queues (= %" PRIu32 "), "
1041                    "must be a positive integer less than %d.",
1042                    vcrypto->max_queues, VIRTIO_QUEUE_MAX);
1043         return;
1044     }
1045
1046     virtio_init(vdev, VIRTIO_ID_CRYPTO, vcrypto->config_size);
1047     vcrypto->curr_queues = 1;
1048     vcrypto->vqs = g_new0(VirtIOCryptoQueue, vcrypto->max_queues);
1049     for (i = 0; i < vcrypto->max_queues; i++) {
1050         vcrypto->vqs[i].dataq =
1051                  virtio_add_queue(vdev, 1024, virtio_crypto_handle_dataq_bh);
1052         vcrypto->vqs[i].dataq_bh =
1053                  qemu_bh_new(virtio_crypto_dataq_bh, &vcrypto->vqs[i]);
1054         vcrypto->vqs[i].vcrypto = vcrypto;
1055     }
1056
1057     vcrypto->ctrl_vq = virtio_add_queue(vdev, 1024, virtio_crypto_handle_ctrl);
1058     if (!cryptodev_backend_is_ready(vcrypto->cryptodev)) {
1059         vcrypto->status &= ~VIRTIO_CRYPTO_S_HW_READY;
1060     } else {
1061         vcrypto->status |= VIRTIO_CRYPTO_S_HW_READY;
1062     }
1063
1064     virtio_crypto_init_config(vdev);
1065     cryptodev_backend_set_used(vcrypto->cryptodev, true);
1066 }
1067
1068 static void virtio_crypto_device_unrealize(DeviceState *dev)
1069 {
1070     VirtIODevice *vdev = VIRTIO_DEVICE(dev);
1071     VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(dev);
1072     VirtIOCryptoQueue *q;
1073     int i, max_queues;
1074
1075     max_queues = vcrypto->multiqueue ? vcrypto->max_queues : 1;
1076     for (i = 0; i < max_queues; i++) {
1077         virtio_delete_queue(vcrypto->vqs[i].dataq);
1078         q = &vcrypto->vqs[i];
1079         qemu_bh_delete(q->dataq_bh);
1080     }
1081
1082     g_free(vcrypto->vqs);
1083     virtio_delete_queue(vcrypto->ctrl_vq);
1084
1085     virtio_cleanup(vdev);
1086     cryptodev_backend_set_used(vcrypto->cryptodev, false);
1087 }
1088
1089 static const VMStateDescription vmstate_virtio_crypto = {
1090     .name = "virtio-crypto",
1091     .unmigratable = 1,
1092     .minimum_version_id = VIRTIO_CRYPTO_VM_VERSION,
1093     .version_id = VIRTIO_CRYPTO_VM_VERSION,
1094     .fields = (VMStateField[]) {
1095         VMSTATE_VIRTIO_DEVICE,
1096         VMSTATE_END_OF_LIST()
1097     },
1098 };
1099
1100 static Property virtio_crypto_properties[] = {
1101     DEFINE_PROP_LINK("cryptodev", VirtIOCrypto, conf.cryptodev,
1102                      TYPE_CRYPTODEV_BACKEND, CryptoDevBackend *),
1103     DEFINE_PROP_END_OF_LIST(),
1104 };
1105
1106 static void virtio_crypto_get_config(VirtIODevice *vdev, uint8_t *config)
1107 {
1108     VirtIOCrypto *c = VIRTIO_CRYPTO(vdev);
1109     struct virtio_crypto_config crypto_cfg = {};
1110
1111     /*
1112      * Virtio-crypto device conforms to VIRTIO 1.0 which is always LE,
1113      * so we can use LE accessors directly.
1114      */
1115     stl_le_p(&crypto_cfg.status, c->status);
1116     stl_le_p(&crypto_cfg.max_dataqueues, c->max_queues);
1117     stl_le_p(&crypto_cfg.crypto_services, c->conf.crypto_services);
1118     stl_le_p(&crypto_cfg.cipher_algo_l, c->conf.cipher_algo_l);
1119     stl_le_p(&crypto_cfg.cipher_algo_h, c->conf.cipher_algo_h);
1120     stl_le_p(&crypto_cfg.hash_algo, c->conf.hash_algo);
1121     stl_le_p(&crypto_cfg.mac_algo_l, c->conf.mac_algo_l);
1122     stl_le_p(&crypto_cfg.mac_algo_h, c->conf.mac_algo_h);
1123     stl_le_p(&crypto_cfg.aead_algo, c->conf.aead_algo);
1124     stl_le_p(&crypto_cfg.max_cipher_key_len, c->conf.max_cipher_key_len);
1125     stl_le_p(&crypto_cfg.max_auth_key_len, c->conf.max_auth_key_len);
1126     stq_le_p(&crypto_cfg.max_size, c->conf.max_size);
1127     stl_le_p(&crypto_cfg.akcipher_algo, c->conf.akcipher_algo);
1128
1129     memcpy(config, &crypto_cfg, c->config_size);
1130 }
1131
1132 static bool virtio_crypto_started(VirtIOCrypto *c, uint8_t status)
1133 {
1134     VirtIODevice *vdev = VIRTIO_DEVICE(c);
1135     return (status & VIRTIO_CONFIG_S_DRIVER_OK) &&
1136         (c->status & VIRTIO_CRYPTO_S_HW_READY) && vdev->vm_running;
1137 }
1138
1139 static void virtio_crypto_vhost_status(VirtIOCrypto *c, uint8_t status)
1140 {
1141     VirtIODevice *vdev = VIRTIO_DEVICE(c);
1142     int queues = c->multiqueue ? c->max_queues : 1;
1143     CryptoDevBackend *b = c->cryptodev;
1144     CryptoDevBackendClient *cc = b->conf.peers.ccs[0];
1145
1146     if (!cryptodev_get_vhost(cc, b, 0)) {
1147         return;
1148     }
1149
1150     if ((virtio_crypto_started(c, status)) == !!c->vhost_started) {
1151         return;
1152     }
1153
1154     if (!c->vhost_started) {
1155         int r;
1156
1157         c->vhost_started = 1;
1158         r = cryptodev_vhost_start(vdev, queues);
1159         if (r < 0) {
1160             error_report("unable to start vhost crypto: %d: "
1161                          "falling back on userspace virtio", -r);
1162             c->vhost_started = 0;
1163         }
1164     } else {
1165         cryptodev_vhost_stop(vdev, queues);
1166         c->vhost_started = 0;
1167     }
1168 }
1169
1170 static void virtio_crypto_set_status(VirtIODevice *vdev, uint8_t status)
1171 {
1172     VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev);
1173
1174     virtio_crypto_vhost_status(vcrypto, status);
1175 }
1176
1177 static void virtio_crypto_guest_notifier_mask(VirtIODevice *vdev, int idx,
1178                                            bool mask)
1179 {
1180     VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev);
1181     int queue = virtio_crypto_vq2q(idx);
1182
1183     assert(vcrypto->vhost_started);
1184
1185     /*
1186      * Add the check for configure interrupt, Use VIRTIO_CONFIG_IRQ_IDX -1
1187      * as the Marco of configure interrupt's IDX, If this driver does not
1188      * support, the function will return
1189      */
1190
1191     if (idx == VIRTIO_CONFIG_IRQ_IDX) {
1192         return;
1193     }
1194     cryptodev_vhost_virtqueue_mask(vdev, queue, idx, mask);
1195 }
1196
1197 static bool virtio_crypto_guest_notifier_pending(VirtIODevice *vdev, int idx)
1198 {
1199     VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev);
1200     int queue = virtio_crypto_vq2q(idx);
1201
1202     assert(vcrypto->vhost_started);
1203
1204     /*
1205      * Add the check for configure interrupt, Use VIRTIO_CONFIG_IRQ_IDX -1
1206      * as the Marco of configure interrupt's IDX, If this driver does not
1207      * support, the function will return
1208      */
1209
1210     if (idx == VIRTIO_CONFIG_IRQ_IDX) {
1211         return false;
1212     }
1213     return cryptodev_vhost_virtqueue_pending(vdev, queue, idx);
1214 }
1215
1216 static struct vhost_dev *virtio_crypto_get_vhost(VirtIODevice *vdev)
1217 {
1218     VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev);
1219     CryptoDevBackend *b = vcrypto->cryptodev;
1220     CryptoDevBackendClient *cc = b->conf.peers.ccs[0];
1221     CryptoDevBackendVhost *vhost_crypto = cryptodev_get_vhost(cc, b, 0);
1222     return &vhost_crypto->dev;
1223 }
1224
1225 static void virtio_crypto_class_init(ObjectClass *klass, void *data)
1226 {
1227     DeviceClass *dc = DEVICE_CLASS(klass);
1228     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
1229
1230     device_class_set_props(dc, virtio_crypto_properties);
1231     dc->vmsd = &vmstate_virtio_crypto;
1232     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
1233     vdc->realize = virtio_crypto_device_realize;
1234     vdc->unrealize = virtio_crypto_device_unrealize;
1235     vdc->get_config = virtio_crypto_get_config;
1236     vdc->get_features = virtio_crypto_get_features;
1237     vdc->reset = virtio_crypto_reset;
1238     vdc->set_status = virtio_crypto_set_status;
1239     vdc->guest_notifier_mask = virtio_crypto_guest_notifier_mask;
1240     vdc->guest_notifier_pending = virtio_crypto_guest_notifier_pending;
1241     vdc->get_vhost = virtio_crypto_get_vhost;
1242 }
1243
1244 static void virtio_crypto_instance_init(Object *obj)
1245 {
1246     VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(obj);
1247
1248     /*
1249      * The default config_size is sizeof(struct virtio_crypto_config).
1250      * Can be overriden with virtio_crypto_set_config_size.
1251      */
1252     vcrypto->config_size = sizeof(struct virtio_crypto_config);
1253 }
1254
1255 static const TypeInfo virtio_crypto_info = {
1256     .name = TYPE_VIRTIO_CRYPTO,
1257     .parent = TYPE_VIRTIO_DEVICE,
1258     .instance_size = sizeof(VirtIOCrypto),
1259     .instance_init = virtio_crypto_instance_init,
1260     .class_init = virtio_crypto_class_init,
1261 };
1262
1263 static void virtio_register_types(void)
1264 {
1265     type_register_static(&virtio_crypto_info);
1266 }
1267
1268 type_init(virtio_register_types)