| 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/core/qdev-properties.h" |
| 24 | #include "standard-headers/linux/virtio_ids.h" |
| 25 | #include "system/cryptodev-vhost.h" |
| 26 | |
| 27 | #define VIRTIO_CRYPTO_VM_VERSION 1 |
| 28 | |
| 29 | typedef struct VirtIOCryptoSessionReq { |
| 30 | VirtIODevice *vdev; |
| 31 | VirtQueue *vq; |
| 32 | VirtQueueElement *elem; |
| 33 | CryptoDevBackendSessionInfo info; |
| 34 | CryptoDevCompletionFunc cb; |
| 35 | } VirtIOCryptoSessionReq; |
| 36 | |
| 37 | static void virtio_crypto_free_create_session_req(VirtIOCryptoSessionReq *sreq) |
| 38 | { |
| 39 | switch (sreq->info.op_code) { |
| 40 | case VIRTIO_CRYPTO_CIPHER_CREATE_SESSION: |
| 41 | g_free(sreq->info.u.sym_sess_info.cipher_key); |
| 42 | g_free(sreq->info.u.sym_sess_info.auth_key); |
| 43 | break; |
| 44 | |
| 45 | case VIRTIO_CRYPTO_AKCIPHER_CREATE_SESSION: |
| 46 | g_free(sreq->info.u.asym_sess_info.key); |
| 47 | break; |
| 48 | |
| 49 | case VIRTIO_CRYPTO_CIPHER_DESTROY_SESSION: |
| 50 | case VIRTIO_CRYPTO_HASH_DESTROY_SESSION: |
| 51 | case VIRTIO_CRYPTO_MAC_DESTROY_SESSION: |
| 52 | case VIRTIO_CRYPTO_AEAD_DESTROY_SESSION: |
| 53 | case VIRTIO_CRYPTO_AKCIPHER_DESTROY_SESSION: |
| 54 | break; |
| 55 | |
| 56 | default: |
| 57 | error_report("Unknown opcode: %u", sreq->info.op_code); |
| 58 | } |
| 59 | g_free(sreq); |
| 60 | } |
| 61 | |
| 62 | /* |
| 63 | * Transfer virtqueue index to crypto queue index. |
| 64 | * The control virtqueue is after the data virtqueues |
| 65 | * so the input value doesn't need to be adjusted |
| 66 | */ |
| 67 | static inline int virtio_crypto_vq2q(int queue_index) |
| 68 | { |
| 69 | return queue_index; |
| 70 | } |
| 71 | |
| 72 | static int |
| 73 | virtio_crypto_cipher_session_helper(VirtIODevice *vdev, |
| 74 | CryptoDevBackendSymSessionInfo *info, |
| 75 | struct virtio_crypto_cipher_session_para *cipher_para, |
| 76 | struct iovec **iov, unsigned int *out_num) |
| 77 | { |
| 78 | VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev); |
| 79 | unsigned int num = *out_num; |
| 80 | |
| 81 | info->cipher_alg = ldl_le_p(&cipher_para->algo); |
| 82 | info->key_len = ldl_le_p(&cipher_para->keylen); |
| 83 | info->direction = ldl_le_p(&cipher_para->op); |
| 84 | DPRINTF("cipher_alg=%" PRIu32 ", info->direction=%" PRIu32 "\n", |
| 85 | info->cipher_alg, info->direction); |
| 86 | |
| 87 | if (info->key_len > vcrypto->conf.max_cipher_key_len) { |
| 88 | error_report("virtio-crypto length of cipher key is too big: %u", |
| 89 | info->key_len); |
| 90 | return -VIRTIO_CRYPTO_ERR; |
| 91 | } |
| 92 | /* Get cipher key */ |
| 93 | if (info->key_len > 0) { |
| 94 | size_t s; |
| 95 | DPRINTF("keylen=%" PRIu32 "\n", info->key_len); |
| 96 | |
| 97 | info->cipher_key = g_malloc(info->key_len); |
| 98 | s = iov_to_buf(*iov, num, 0, info->cipher_key, info->key_len); |
| 99 | if (unlikely(s != info->key_len)) { |
| 100 | virtio_error(vdev, "virtio-crypto cipher key incorrect"); |
| 101 | return -EFAULT; |
| 102 | } |
| 103 | iov_discard_front(iov, &num, info->key_len); |
| 104 | *out_num = num; |
| 105 | } |
| 106 | |
| 107 | return 0; |
| 108 | } |
| 109 | |
| 110 | static int |
| 111 | virtio_crypto_create_sym_session(VirtIOCrypto *vcrypto, |
| 112 | struct virtio_crypto_sym_create_session_req *sess_req, |
| 113 | uint32_t queue_id, |
| 114 | uint32_t opcode, |
| 115 | struct iovec *iov, unsigned int out_num, |
| 116 | VirtIOCryptoSessionReq *sreq) |
| 117 | { |
| 118 | VirtIODevice *vdev = VIRTIO_DEVICE(vcrypto); |
| 119 | CryptoDevBackendSymSessionInfo *sym_info = &sreq->info.u.sym_sess_info; |
| 120 | int queue_index; |
| 121 | uint32_t op_type; |
| 122 | int ret; |
| 123 | |
| 124 | op_type = ldl_le_p(&sess_req->op_type); |
| 125 | sreq->info.op_code = opcode; |
| 126 | |
| 127 | sym_info = &sreq->info.u.sym_sess_info; |
| 128 | sym_info->op_type = op_type; |
| 129 | |
| 130 | if (op_type == VIRTIO_CRYPTO_SYM_OP_CIPHER) { |
| 131 | ret = virtio_crypto_cipher_session_helper(vdev, sym_info, |
| 132 | &sess_req->u.cipher.para, |
| 133 | &iov, &out_num); |
| 134 | if (ret < 0) { |
| 135 | return ret; |
| 136 | } |
| 137 | } else if (op_type == VIRTIO_CRYPTO_SYM_OP_ALGORITHM_CHAINING) { |
| 138 | size_t s; |
| 139 | /* cipher part */ |
| 140 | ret = virtio_crypto_cipher_session_helper(vdev, sym_info, |
| 141 | &sess_req->u.chain.para.cipher_param, |
| 142 | &iov, &out_num); |
| 143 | if (ret < 0) { |
| 144 | return ret; |
| 145 | } |
| 146 | /* hash part */ |
| 147 | sym_info->alg_chain_order = ldl_le_p( |
| 148 | &sess_req->u.chain.para.alg_chain_order); |
| 149 | sym_info->add_len = ldl_le_p(&sess_req->u.chain.para.aad_len); |
| 150 | sym_info->hash_mode = ldl_le_p(&sess_req->u.chain.para.hash_mode); |
| 151 | if (sym_info->hash_mode == VIRTIO_CRYPTO_SYM_HASH_MODE_AUTH) { |
| 152 | sym_info->hash_alg = |
| 153 | ldl_le_p(&sess_req->u.chain.para.u.mac_param.algo); |
| 154 | sym_info->auth_key_len = ldl_le_p( |
| 155 | &sess_req->u.chain.para.u.mac_param.auth_key_len); |
| 156 | sym_info->hash_result_len = ldl_le_p( |
| 157 | &sess_req->u.chain.para.u.mac_param.hash_result_len); |
| 158 | if (sym_info->auth_key_len > vcrypto->conf.max_auth_key_len) { |
| 159 | error_report("virtio-crypto length of auth key is too big: %u", |
| 160 | sym_info->auth_key_len); |
| 161 | return -VIRTIO_CRYPTO_ERR; |
| 162 | } |
| 163 | /* get auth key */ |
| 164 | if (sym_info->auth_key_len > 0) { |
| 165 | sym_info->auth_key = g_malloc(sym_info->auth_key_len); |
| 166 | s = iov_to_buf(iov, out_num, 0, sym_info->auth_key, |
| 167 | sym_info->auth_key_len); |
| 168 | if (unlikely(s != sym_info->auth_key_len)) { |
| 169 | virtio_error(vdev, |
| 170 | "virtio-crypto authenticated key incorrect"); |
| 171 | return -EFAULT; |
| 172 | } |
| 173 | iov_discard_front(&iov, &out_num, sym_info->auth_key_len); |
| 174 | } |
| 175 | } else if (sym_info->hash_mode == VIRTIO_CRYPTO_SYM_HASH_MODE_PLAIN) { |
| 176 | sym_info->hash_alg = ldl_le_p( |
| 177 | &sess_req->u.chain.para.u.hash_param.algo); |
| 178 | sym_info->hash_result_len = ldl_le_p( |
| 179 | &sess_req->u.chain.para.u.hash_param.hash_result_len); |
| 180 | } else { |
| 181 | /* VIRTIO_CRYPTO_SYM_HASH_MODE_NESTED */ |
| 182 | error_report("unsupported hash mode"); |
| 183 | return -VIRTIO_CRYPTO_NOTSUPP; |
| 184 | } |
| 185 | } else { |
| 186 | /* VIRTIO_CRYPTO_SYM_OP_NONE */ |
| 187 | error_report("unsupported cipher op_type: VIRTIO_CRYPTO_SYM_OP_NONE"); |
| 188 | return -VIRTIO_CRYPTO_NOTSUPP; |
| 189 | } |
| 190 | |
| 191 | queue_index = virtio_crypto_vq2q(queue_id); |
| 192 | return cryptodev_backend_create_session(vcrypto->cryptodev, &sreq->info, |
| 193 | queue_index, sreq->cb, sreq); |
| 194 | } |
| 195 | |
| 196 | static int |
| 197 | virtio_crypto_create_asym_session(VirtIOCrypto *vcrypto, |
| 198 | struct virtio_crypto_akcipher_create_session_req *sess_req, |
| 199 | uint32_t queue_id, uint32_t opcode, |
| 200 | struct iovec *iov, unsigned int out_num, |
| 201 | VirtIOCryptoSessionReq *sreq) |
| 202 | { |
| 203 | VirtIODevice *vdev = VIRTIO_DEVICE(vcrypto); |
| 204 | CryptoDevBackendAsymSessionInfo *asym_info = &sreq->info.u.asym_sess_info; |
| 205 | int queue_index; |
| 206 | uint32_t algo, keytype, keylen; |
| 207 | |
| 208 | sreq->info.op_code = opcode; |
| 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 (unlikely(keylen > vcrypto->conf.max_size)) { |
| 220 | error_report("virtio-crypto length of akcipher key is too large: %u", |
| 221 | keylen); |
| 222 | return -VIRTIO_CRYPTO_ERR; |
| 223 | } |
| 224 | |
| 225 | if (keylen) { |
| 226 | asym_info->key = g_malloc(keylen); |
| 227 | if (iov_to_buf(iov, out_num, 0, asym_info->key, keylen) != keylen) { |
| 228 | virtio_error(vdev, "virtio-crypto asym key incorrect"); |
| 229 | return -EFAULT; |
| 230 | } |
| 231 | iov_discard_front(&iov, &out_num, keylen); |
| 232 | } |
| 233 | |
| 234 | asym_info = &sreq->info.u.asym_sess_info; |
| 235 | asym_info->algo = algo; |
| 236 | asym_info->keytype = keytype; |
| 237 | asym_info->keylen = keylen; |
| 238 | switch (asym_info->algo) { |
| 239 | case VIRTIO_CRYPTO_AKCIPHER_RSA: |
| 240 | asym_info->u.rsa.padding_algo = |
| 241 | ldl_le_p(&sess_req->para.u.rsa.padding_algo); |
| 242 | asym_info->u.rsa.hash_algo = |
| 243 | ldl_le_p(&sess_req->para.u.rsa.hash_algo); |
| 244 | break; |
| 245 | |
| 246 | /* TODO DSA&ECDSA handling */ |
| 247 | |
| 248 | default: |
| 249 | return -VIRTIO_CRYPTO_ERR; |
| 250 | } |
| 251 | |
| 252 | queue_index = virtio_crypto_vq2q(queue_id); |
| 253 | return cryptodev_backend_create_session(vcrypto->cryptodev, &sreq->info, |
| 254 | queue_index, sreq->cb, sreq); |
| 255 | } |
| 256 | |
| 257 | static int |
| 258 | virtio_crypto_handle_close_session(VirtIOCrypto *vcrypto, |
| 259 | struct virtio_crypto_destroy_session_req *close_sess_req, |
| 260 | uint32_t queue_id, |
| 261 | VirtIOCryptoSessionReq *sreq) |
| 262 | { |
| 263 | uint64_t session_id; |
| 264 | |
| 265 | session_id = ldq_le_p(&close_sess_req->session_id); |
| 266 | DPRINTF("close session, id=%" PRIu64 "\n", session_id); |
| 267 | |
| 268 | return cryptodev_backend_close_session( |
| 269 | vcrypto->cryptodev, session_id, queue_id, sreq->cb, sreq); |
| 270 | } |
| 271 | |
| 272 | static void virtio_crypto_create_session_completion(void *opaque, int ret) |
| 273 | { |
| 274 | VirtIOCryptoSessionReq *sreq = (VirtIOCryptoSessionReq *)opaque; |
| 275 | VirtQueue *vq = sreq->vq; |
| 276 | VirtQueueElement *elem = sreq->elem; |
| 277 | VirtIODevice *vdev = sreq->vdev; |
| 278 | struct virtio_crypto_session_input input; |
| 279 | struct iovec *in_iov = elem->in_sg; |
| 280 | unsigned in_num = elem->in_num; |
| 281 | size_t s; |
| 282 | |
| 283 | memset(&input, 0, sizeof(input)); |
| 284 | /* Serious errors, need to reset virtio crypto device */ |
| 285 | if (ret == -EFAULT) { |
| 286 | virtqueue_detach_element(vq, elem, 0); |
| 287 | goto out; |
| 288 | } else if (ret == -VIRTIO_CRYPTO_NOTSUPP) { |
| 289 | stl_le_p(&input.status, VIRTIO_CRYPTO_NOTSUPP); |
| 290 | } else if (ret == -VIRTIO_CRYPTO_KEY_REJECTED) { |
| 291 | stl_le_p(&input.status, VIRTIO_CRYPTO_KEY_REJECTED); |
| 292 | } else if (ret != VIRTIO_CRYPTO_OK) { |
| 293 | stl_le_p(&input.status, VIRTIO_CRYPTO_ERR); |
| 294 | } else { |
| 295 | /* Set the session id */ |
| 296 | stq_le_p(&input.session_id, sreq->info.session_id); |
| 297 | stl_le_p(&input.status, VIRTIO_CRYPTO_OK); |
| 298 | } |
| 299 | |
| 300 | s = iov_from_buf(in_iov, in_num, 0, &input, sizeof(input)); |
| 301 | if (unlikely(s != sizeof(input))) { |
| 302 | virtio_error(vdev, "virtio-crypto input incorrect"); |
| 303 | virtqueue_detach_element(vq, elem, 0); |
| 304 | goto out; |
| 305 | } |
| 306 | virtqueue_push(vq, elem, sizeof(input)); |
| 307 | virtio_notify(vdev, vq); |
| 308 | |
| 309 | out: |
| 310 | g_free(elem); |
| 311 | virtio_crypto_free_create_session_req(sreq); |
| 312 | } |
| 313 | |
| 314 | static void virtio_crypto_destroy_session_completion(void *opaque, int ret) |
| 315 | { |
| 316 | VirtIOCryptoSessionReq *sreq = (VirtIOCryptoSessionReq *)opaque; |
| 317 | VirtQueue *vq = sreq->vq; |
| 318 | VirtQueueElement *elem = sreq->elem; |
| 319 | VirtIODevice *vdev = sreq->vdev; |
| 320 | struct iovec *in_iov = elem->in_sg; |
| 321 | unsigned in_num = elem->in_num; |
| 322 | uint8_t status; |
| 323 | size_t s; |
| 324 | |
| 325 | if (ret < 0) { |
| 326 | status = VIRTIO_CRYPTO_ERR; |
| 327 | } else { |
| 328 | status = VIRTIO_CRYPTO_OK; |
| 329 | } |
| 330 | s = iov_from_buf(in_iov, in_num, 0, &status, sizeof(status)); |
| 331 | if (unlikely(s != sizeof(status))) { |
| 332 | virtio_error(vdev, "virtio-crypto status incorrect"); |
| 333 | virtqueue_detach_element(vq, elem, 0); |
| 334 | goto out; |
| 335 | } |
| 336 | virtqueue_push(vq, elem, sizeof(status)); |
| 337 | virtio_notify(vdev, vq); |
| 338 | |
| 339 | out: |
| 340 | g_free(elem); |
| 341 | g_free(sreq); |
| 342 | } |
| 343 | |
| 344 | static void virtio_crypto_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) |
| 345 | { |
| 346 | VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev); |
| 347 | struct virtio_crypto_op_ctrl_req ctrl; |
| 348 | VirtQueueElement *elem; |
| 349 | VirtIOCryptoSessionReq *sreq; |
| 350 | unsigned out_num; |
| 351 | unsigned in_num; |
| 352 | uint32_t queue_id; |
| 353 | uint32_t opcode; |
| 354 | struct virtio_crypto_session_input input; |
| 355 | size_t s; |
| 356 | int ret; |
| 357 | struct iovec *out_iov; |
| 358 | struct iovec *in_iov; |
| 359 | |
| 360 | for (;;) { |
| 361 | g_autofree struct iovec *out_iov_copy = NULL; |
| 362 | |
| 363 | elem = virtqueue_pop(vq, sizeof(VirtQueueElement)); |
| 364 | if (!elem) { |
| 365 | break; |
| 366 | } |
| 367 | if (elem->out_num < 1 || elem->in_num < 1) { |
| 368 | virtio_error(vdev, "virtio-crypto ctrl missing headers"); |
| 369 | virtqueue_detach_element(vq, elem, 0); |
| 370 | g_free(elem); |
| 371 | break; |
| 372 | } |
| 373 | |
| 374 | out_num = elem->out_num; |
| 375 | out_iov_copy = g_memdup2(elem->out_sg, sizeof(out_iov[0]) * out_num); |
| 376 | out_iov = out_iov_copy; |
| 377 | |
| 378 | in_num = elem->in_num; |
| 379 | in_iov = elem->in_sg; |
| 380 | |
| 381 | if (unlikely(iov_to_buf(out_iov, out_num, 0, &ctrl, sizeof(ctrl)) |
| 382 | != sizeof(ctrl))) { |
| 383 | virtio_error(vdev, "virtio-crypto request ctrl_hdr too short"); |
| 384 | virtqueue_detach_element(vq, elem, 0); |
| 385 | g_free(elem); |
| 386 | break; |
| 387 | } |
| 388 | iov_discard_front(&out_iov, &out_num, sizeof(ctrl)); |
| 389 | |
| 390 | opcode = ldl_le_p(&ctrl.header.opcode); |
| 391 | queue_id = ldl_le_p(&ctrl.header.queue_id); |
| 392 | |
| 393 | sreq = g_new0(VirtIOCryptoSessionReq, 1); |
| 394 | sreq->vdev = vdev; |
| 395 | sreq->vq = vq; |
| 396 | sreq->elem = elem; |
| 397 | |
| 398 | switch (opcode) { |
| 399 | case VIRTIO_CRYPTO_CIPHER_CREATE_SESSION: |
| 400 | sreq->cb = virtio_crypto_create_session_completion; |
| 401 | ret = virtio_crypto_create_sym_session(vcrypto, |
| 402 | &ctrl.u.sym_create_session, |
| 403 | queue_id, opcode, |
| 404 | out_iov, out_num, |
| 405 | sreq); |
| 406 | if (ret < 0) { |
| 407 | virtio_crypto_create_session_completion(sreq, ret); |
| 408 | } |
| 409 | break; |
| 410 | |
| 411 | case VIRTIO_CRYPTO_AKCIPHER_CREATE_SESSION: |
| 412 | sreq->cb = virtio_crypto_create_session_completion; |
| 413 | ret = virtio_crypto_create_asym_session(vcrypto, |
| 414 | &ctrl.u.akcipher_create_session, |
| 415 | queue_id, opcode, |
| 416 | out_iov, out_num, |
| 417 | sreq); |
| 418 | if (ret < 0) { |
| 419 | virtio_crypto_create_session_completion(sreq, ret); |
| 420 | } |
| 421 | break; |
| 422 | |
| 423 | case VIRTIO_CRYPTO_CIPHER_DESTROY_SESSION: |
| 424 | case VIRTIO_CRYPTO_HASH_DESTROY_SESSION: |
| 425 | case VIRTIO_CRYPTO_MAC_DESTROY_SESSION: |
| 426 | case VIRTIO_CRYPTO_AEAD_DESTROY_SESSION: |
| 427 | case VIRTIO_CRYPTO_AKCIPHER_DESTROY_SESSION: |
| 428 | sreq->cb = virtio_crypto_destroy_session_completion; |
| 429 | ret = virtio_crypto_handle_close_session(vcrypto, |
| 430 | &ctrl.u.destroy_session, queue_id, |
| 431 | sreq); |
| 432 | if (ret < 0) { |
| 433 | virtio_crypto_destroy_session_completion(sreq, ret); |
| 434 | } |
| 435 | break; |
| 436 | |
| 437 | case VIRTIO_CRYPTO_HASH_CREATE_SESSION: |
| 438 | case VIRTIO_CRYPTO_MAC_CREATE_SESSION: |
| 439 | case VIRTIO_CRYPTO_AEAD_CREATE_SESSION: |
| 440 | default: |
| 441 | memset(&input, 0, sizeof(input)); |
| 442 | error_report("virtio-crypto unsupported ctrl opcode: %d", opcode); |
| 443 | stl_le_p(&input.status, VIRTIO_CRYPTO_NOTSUPP); |
| 444 | s = iov_from_buf(in_iov, in_num, 0, &input, sizeof(input)); |
| 445 | if (unlikely(s != sizeof(input))) { |
| 446 | virtio_error(vdev, "virtio-crypto input incorrect"); |
| 447 | virtqueue_detach_element(vq, elem, 0); |
| 448 | } else { |
| 449 | virtqueue_push(vq, elem, sizeof(input)); |
| 450 | virtio_notify(vdev, vq); |
| 451 | } |
| 452 | g_free(sreq); |
| 453 | g_free(elem); |
| 454 | |
| 455 | break; |
| 456 | } /* end switch case */ |
| 457 | |
| 458 | } /* end for loop */ |
| 459 | } |
| 460 | |
| 461 | static void virtio_crypto_init_request(VirtIOCrypto *vcrypto, VirtQueue *vq, |
| 462 | VirtIOCryptoReq *req) |
| 463 | { |
| 464 | req->vcrypto = vcrypto; |
| 465 | req->vq = vq; |
| 466 | req->in = NULL; |
| 467 | req->in_iov = NULL; |
| 468 | req->in_num = 0; |
| 469 | req->in_len = 0; |
| 470 | req->flags = QCRYPTODEV_BACKEND_ALGO_TYPE__MAX; |
| 471 | memset(&req->op_info, 0x00, sizeof(req->op_info)); |
| 472 | } |
| 473 | |
| 474 | static void virtio_crypto_free_request(VirtIOCryptoReq *req) |
| 475 | { |
| 476 | if (!req) { |
| 477 | return; |
| 478 | } |
| 479 | |
| 480 | if (req->flags == QCRYPTODEV_BACKEND_ALGO_TYPE_SYM) { |
| 481 | size_t max_len; |
| 482 | CryptoDevBackendSymOpInfo *op_info = req->op_info.u.sym_op_info; |
| 483 | |
| 484 | if (op_info) { |
| 485 | max_len = op_info->iv_len + |
| 486 | op_info->aad_len + |
| 487 | op_info->src_len + |
| 488 | op_info->dst_len + |
| 489 | op_info->digest_result_len; |
| 490 | |
| 491 | /* Zeroize and free request data structure */ |
| 492 | memset(op_info, 0, sizeof(*op_info) + max_len); |
| 493 | g_free(op_info); |
| 494 | } |
| 495 | } else if (req->flags == QCRYPTODEV_BACKEND_ALGO_TYPE_ASYM) { |
| 496 | CryptoDevBackendAsymOpInfo *op_info = req->op_info.u.asym_op_info; |
| 497 | if (op_info) { |
| 498 | g_free(op_info->src); |
| 499 | g_free(op_info->dst); |
| 500 | memset(op_info, 0, sizeof(*op_info)); |
| 501 | g_free(op_info); |
| 502 | } |
| 503 | } |
| 504 | |
| 505 | g_free(req->in_iov); |
| 506 | g_free(req); |
| 507 | } |
| 508 | |
| 509 | static void |
| 510 | virtio_crypto_sym_input_data_helper(VirtIODevice *vdev, |
| 511 | VirtIOCryptoReq *req, |
| 512 | uint32_t status, |
| 513 | CryptoDevBackendSymOpInfo *sym_op_info) |
| 514 | { |
| 515 | size_t s, len; |
| 516 | struct iovec *in_iov = req->in_iov; |
| 517 | |
| 518 | if (status != VIRTIO_CRYPTO_OK) { |
| 519 | return; |
| 520 | } |
| 521 | |
| 522 | len = sym_op_info->src_len; |
| 523 | /* Save the cipher result */ |
| 524 | s = iov_from_buf(in_iov, req->in_num, 0, sym_op_info->dst, len); |
| 525 | if (s != len) { |
| 526 | virtio_error(vdev, "virtio-crypto dest data incorrect"); |
| 527 | return; |
| 528 | } |
| 529 | |
| 530 | iov_discard_front(&in_iov, &req->in_num, len); |
| 531 | |
| 532 | if (sym_op_info->op_type == |
| 533 | VIRTIO_CRYPTO_SYM_OP_ALGORITHM_CHAINING) { |
| 534 | /* Save the digest result */ |
| 535 | s = iov_from_buf(in_iov, req->in_num, 0, |
| 536 | sym_op_info->digest_result, |
| 537 | sym_op_info->digest_result_len); |
| 538 | if (s != sym_op_info->digest_result_len) { |
| 539 | virtio_error(vdev, "virtio-crypto digest result incorrect"); |
| 540 | } |
| 541 | } |
| 542 | } |
| 543 | |
| 544 | static void |
| 545 | virtio_crypto_akcipher_input_data_helper(VirtIODevice *vdev, |
| 546 | VirtIOCryptoReq *req, int32_t status, |
| 547 | CryptoDevBackendAsymOpInfo *asym_op_info) |
| 548 | { |
| 549 | size_t s, len; |
| 550 | struct iovec *in_iov = req->in_iov; |
| 551 | |
| 552 | if (status != VIRTIO_CRYPTO_OK) { |
| 553 | return; |
| 554 | } |
| 555 | |
| 556 | len = asym_op_info->dst_len; |
| 557 | if (!len) { |
| 558 | return; |
| 559 | } |
| 560 | |
| 561 | s = iov_from_buf(in_iov, req->in_num, 0, asym_op_info->dst, len); |
| 562 | if (s != len) { |
| 563 | virtio_error(vdev, "virtio-crypto asym dest data incorrect"); |
| 564 | return; |
| 565 | } |
| 566 | |
| 567 | iov_discard_front(&in_iov, &req->in_num, len); |
| 568 | |
| 569 | /* For akcipher, dst_len may be changed after operation */ |
| 570 | req->in_len = sizeof(struct virtio_crypto_inhdr) + asym_op_info->dst_len; |
| 571 | } |
| 572 | |
| 573 | static void virtio_crypto_req_complete(void *opaque, int ret) |
| 574 | { |
| 575 | VirtIOCryptoReq *req = (VirtIOCryptoReq *)opaque; |
| 576 | VirtIOCrypto *vcrypto = req->vcrypto; |
| 577 | VirtIODevice *vdev = VIRTIO_DEVICE(vcrypto); |
| 578 | uint8_t status = -ret; |
| 579 | |
| 580 | if (req->flags == QCRYPTODEV_BACKEND_ALGO_TYPE_SYM) { |
| 581 | virtio_crypto_sym_input_data_helper(vdev, req, status, |
| 582 | req->op_info.u.sym_op_info); |
| 583 | } else if (req->flags == QCRYPTODEV_BACKEND_ALGO_TYPE_ASYM) { |
| 584 | virtio_crypto_akcipher_input_data_helper(vdev, req, status, |
| 585 | req->op_info.u.asym_op_info); |
| 586 | } |
| 587 | stb_p(&req->in->status, status); |
| 588 | virtqueue_push(req->vq, &req->elem, req->in_len); |
| 589 | virtio_notify(vdev, req->vq); |
| 590 | virtio_crypto_free_request(req); |
| 591 | } |
| 592 | |
| 593 | static VirtIOCryptoReq * |
| 594 | virtio_crypto_get_request(VirtIOCrypto *s, VirtQueue *vq) |
| 595 | { |
| 596 | VirtIOCryptoReq *req = virtqueue_pop(vq, sizeof(VirtIOCryptoReq)); |
| 597 | |
| 598 | if (req) { |
| 599 | virtio_crypto_init_request(s, vq, req); |
| 600 | } |
| 601 | return req; |
| 602 | } |
| 603 | |
| 604 | static CryptoDevBackendSymOpInfo * |
| 605 | virtio_crypto_sym_op_helper(VirtIODevice *vdev, |
| 606 | struct virtio_crypto_cipher_para *cipher_para, |
| 607 | struct virtio_crypto_alg_chain_data_para *alg_chain_para, |
| 608 | struct iovec *iov, unsigned int out_num) |
| 609 | { |
| 610 | VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev); |
| 611 | CryptoDevBackendSymOpInfo *op_info; |
| 612 | uint32_t src_len = 0, dst_len = 0; |
| 613 | uint32_t iv_len = 0; |
| 614 | uint32_t aad_len = 0, hash_result_len = 0; |
| 615 | uint32_t hash_start_src_offset = 0, len_to_hash = 0; |
| 616 | uint32_t cipher_start_src_offset = 0, len_to_cipher = 0; |
| 617 | |
| 618 | uint64_t max_len, curr_size = 0; |
| 619 | size_t s; |
| 620 | |
| 621 | /* Plain cipher */ |
| 622 | if (cipher_para) { |
| 623 | iv_len = ldl_le_p(&cipher_para->iv_len); |
| 624 | src_len = ldl_le_p(&cipher_para->src_data_len); |
| 625 | dst_len = ldl_le_p(&cipher_para->dst_data_len); |
| 626 | } else if (alg_chain_para) { /* Algorithm chain */ |
| 627 | iv_len = ldl_le_p(&alg_chain_para->iv_len); |
| 628 | src_len = ldl_le_p(&alg_chain_para->src_data_len); |
| 629 | dst_len = ldl_le_p(&alg_chain_para->dst_data_len); |
| 630 | |
| 631 | aad_len = ldl_le_p(&alg_chain_para->aad_len); |
| 632 | hash_result_len = ldl_le_p(&alg_chain_para->hash_result_len); |
| 633 | hash_start_src_offset = ldl_le_p( |
| 634 | &alg_chain_para->hash_start_src_offset); |
| 635 | cipher_start_src_offset = ldl_le_p( |
| 636 | &alg_chain_para->cipher_start_src_offset); |
| 637 | len_to_cipher = ldl_le_p(&alg_chain_para->len_to_cipher); |
| 638 | len_to_hash = ldl_le_p(&alg_chain_para->len_to_hash); |
| 639 | } else { |
| 640 | return NULL; |
| 641 | } |
| 642 | |
| 643 | if (unlikely(src_len != dst_len)) { |
| 644 | virtio_error(vdev, "sym request src len is different from dst len"); |
| 645 | return NULL; |
| 646 | } |
| 647 | |
| 648 | max_len = (uint64_t)iv_len + aad_len + src_len + dst_len + hash_result_len; |
| 649 | if (unlikely(max_len > vcrypto->conf.max_size)) { |
| 650 | virtio_error(vdev, "virtio-crypto too big length"); |
| 651 | return NULL; |
| 652 | } |
| 653 | |
| 654 | op_info = g_malloc0(sizeof(CryptoDevBackendSymOpInfo) + max_len); |
| 655 | op_info->iv_len = iv_len; |
| 656 | op_info->src_len = src_len; |
| 657 | op_info->dst_len = dst_len; |
| 658 | op_info->aad_len = aad_len; |
| 659 | op_info->digest_result_len = hash_result_len; |
| 660 | op_info->hash_start_src_offset = hash_start_src_offset; |
| 661 | op_info->len_to_hash = len_to_hash; |
| 662 | op_info->cipher_start_src_offset = cipher_start_src_offset; |
| 663 | op_info->len_to_cipher = len_to_cipher; |
| 664 | /* Handle the initialization vector */ |
| 665 | if (op_info->iv_len > 0) { |
| 666 | DPRINTF("iv_len=%" PRIu32 "\n", op_info->iv_len); |
| 667 | op_info->iv = op_info->data + curr_size; |
| 668 | |
| 669 | s = iov_to_buf(iov, out_num, 0, op_info->iv, op_info->iv_len); |
| 670 | if (unlikely(s != op_info->iv_len)) { |
| 671 | virtio_error(vdev, "virtio-crypto iv incorrect"); |
| 672 | goto err; |
| 673 | } |
| 674 | iov_discard_front(&iov, &out_num, op_info->iv_len); |
| 675 | curr_size += op_info->iv_len; |
| 676 | } |
| 677 | |
| 678 | /* Handle additional authentication data if exists */ |
| 679 | if (op_info->aad_len > 0) { |
| 680 | DPRINTF("aad_len=%" PRIu32 "\n", op_info->aad_len); |
| 681 | op_info->aad_data = op_info->data + curr_size; |
| 682 | |
| 683 | s = iov_to_buf(iov, out_num, 0, op_info->aad_data, op_info->aad_len); |
| 684 | if (unlikely(s != op_info->aad_len)) { |
| 685 | virtio_error(vdev, "virtio-crypto additional auth data incorrect"); |
| 686 | goto err; |
| 687 | } |
| 688 | iov_discard_front(&iov, &out_num, op_info->aad_len); |
| 689 | |
| 690 | curr_size += op_info->aad_len; |
| 691 | } |
| 692 | |
| 693 | /* Handle the source data */ |
| 694 | if (op_info->src_len > 0) { |
| 695 | DPRINTF("src_len=%" PRIu32 "\n", op_info->src_len); |
| 696 | op_info->src = op_info->data + curr_size; |
| 697 | |
| 698 | s = iov_to_buf(iov, out_num, 0, op_info->src, op_info->src_len); |
| 699 | if (unlikely(s != op_info->src_len)) { |
| 700 | virtio_error(vdev, "virtio-crypto source data incorrect"); |
| 701 | goto err; |
| 702 | } |
| 703 | iov_discard_front(&iov, &out_num, op_info->src_len); |
| 704 | |
| 705 | curr_size += op_info->src_len; |
| 706 | } |
| 707 | |
| 708 | /* Handle the destination data */ |
| 709 | op_info->dst = op_info->data + curr_size; |
| 710 | curr_size += op_info->dst_len; |
| 711 | |
| 712 | DPRINTF("dst_len=%" PRIu32 "\n", op_info->dst_len); |
| 713 | |
| 714 | /* Handle the hash digest result */ |
| 715 | if (hash_result_len > 0) { |
| 716 | DPRINTF("hash_result_len=%" PRIu32 "\n", hash_result_len); |
| 717 | op_info->digest_result = op_info->data + curr_size; |
| 718 | } |
| 719 | |
| 720 | return op_info; |
| 721 | |
| 722 | err: |
| 723 | g_free(op_info); |
| 724 | return NULL; |
| 725 | } |
| 726 | |
| 727 | static int |
| 728 | virtio_crypto_handle_sym_req(VirtIOCrypto *vcrypto, |
| 729 | struct virtio_crypto_sym_data_req *req, |
| 730 | CryptoDevBackendOpInfo *op_info, |
| 731 | struct iovec *iov, unsigned int out_num) |
| 732 | { |
| 733 | VirtIODevice *vdev = VIRTIO_DEVICE(vcrypto); |
| 734 | CryptoDevBackendSymOpInfo *sym_op_info; |
| 735 | uint32_t op_type; |
| 736 | |
| 737 | op_type = ldl_le_p(&req->op_type); |
| 738 | if (op_type == VIRTIO_CRYPTO_SYM_OP_CIPHER) { |
| 739 | sym_op_info = virtio_crypto_sym_op_helper(vdev, &req->u.cipher.para, |
| 740 | NULL, iov, out_num); |
| 741 | if (!sym_op_info) { |
| 742 | return -EFAULT; |
| 743 | } |
| 744 | } else if (op_type == VIRTIO_CRYPTO_SYM_OP_ALGORITHM_CHAINING) { |
| 745 | sym_op_info = virtio_crypto_sym_op_helper(vdev, NULL, |
| 746 | &req->u.chain.para, |
| 747 | iov, out_num); |
| 748 | if (!sym_op_info) { |
| 749 | return -EFAULT; |
| 750 | } |
| 751 | } else { |
| 752 | /* VIRTIO_CRYPTO_SYM_OP_NONE */ |
| 753 | error_report("virtio-crypto unsupported cipher type"); |
| 754 | return -VIRTIO_CRYPTO_NOTSUPP; |
| 755 | } |
| 756 | |
| 757 | sym_op_info->op_type = op_type; |
| 758 | op_info->u.sym_op_info = sym_op_info; |
| 759 | |
| 760 | return 0; |
| 761 | } |
| 762 | |
| 763 | static int |
| 764 | virtio_crypto_handle_asym_req(VirtIOCrypto *vcrypto, |
| 765 | struct virtio_crypto_akcipher_data_req *req, |
| 766 | CryptoDevBackendOpInfo *op_info, |
| 767 | struct iovec *iov, unsigned int out_num) |
| 768 | { |
| 769 | VirtIODevice *vdev = VIRTIO_DEVICE(vcrypto); |
| 770 | CryptoDevBackendAsymOpInfo *asym_op_info; |
| 771 | uint32_t src_len; |
| 772 | uint32_t dst_len; |
| 773 | uint32_t len; |
| 774 | uint8_t *src = NULL; |
| 775 | uint8_t *dst = NULL; |
| 776 | uint64_t max_len; |
| 777 | |
| 778 | asym_op_info = g_new0(CryptoDevBackendAsymOpInfo, 1); |
| 779 | src_len = ldl_le_p(&req->para.src_data_len); |
| 780 | dst_len = ldl_le_p(&req->para.dst_data_len); |
| 781 | |
| 782 | max_len = (uint64_t)src_len + dst_len; |
| 783 | if (unlikely(max_len > vcrypto->conf.max_size)) { |
| 784 | virtio_error(vdev, "virtio-crypto asym request is too large"); |
| 785 | goto err; |
| 786 | } |
| 787 | |
| 788 | if (src_len > 0) { |
| 789 | src = g_malloc0(src_len); |
| 790 | len = iov_to_buf(iov, out_num, 0, src, src_len); |
| 791 | if (unlikely(len != src_len)) { |
| 792 | virtio_error(vdev, "virtio-crypto asym src data incorrect" |
| 793 | "expected %u, actual %u", src_len, len); |
| 794 | goto err; |
| 795 | } |
| 796 | |
| 797 | iov_discard_front(&iov, &out_num, src_len); |
| 798 | } |
| 799 | |
| 800 | if (dst_len > 0) { |
| 801 | dst = g_malloc0(dst_len); |
| 802 | |
| 803 | if (op_info->op_code == VIRTIO_CRYPTO_AKCIPHER_VERIFY) { |
| 804 | len = iov_to_buf(iov, out_num, 0, dst, dst_len); |
| 805 | if (unlikely(len != dst_len)) { |
| 806 | virtio_error(vdev, "virtio-crypto asym dst data incorrect" |
| 807 | "expected %u, actual %u", dst_len, len); |
| 808 | goto err; |
| 809 | } |
| 810 | |
| 811 | iov_discard_front(&iov, &out_num, dst_len); |
| 812 | } |
| 813 | } |
| 814 | |
| 815 | asym_op_info->src_len = src_len; |
| 816 | asym_op_info->dst_len = dst_len; |
| 817 | asym_op_info->src = src; |
| 818 | asym_op_info->dst = dst; |
| 819 | op_info->u.asym_op_info = asym_op_info; |
| 820 | |
| 821 | return 0; |
| 822 | |
| 823 | err: |
| 824 | g_free(asym_op_info); |
| 825 | g_free(src); |
| 826 | g_free(dst); |
| 827 | |
| 828 | return -EFAULT; |
| 829 | } |
| 830 | |
| 831 | static int |
| 832 | virtio_crypto_handle_request(VirtIOCryptoReq *request) |
| 833 | { |
| 834 | VirtIOCrypto *vcrypto = request->vcrypto; |
| 835 | VirtIODevice *vdev = VIRTIO_DEVICE(vcrypto); |
| 836 | VirtQueueElement *elem = &request->elem; |
| 837 | int queue_index = virtio_crypto_vq2q(virtio_get_queue_index(request->vq)); |
| 838 | struct virtio_crypto_op_data_req req; |
| 839 | int ret; |
| 840 | g_autofree struct iovec *in_iov_copy = NULL; |
| 841 | g_autofree struct iovec *out_iov_copy = NULL; |
| 842 | struct iovec *in_iov; |
| 843 | struct iovec *out_iov; |
| 844 | unsigned in_num; |
| 845 | unsigned out_num; |
| 846 | uint32_t opcode; |
| 847 | CryptoDevBackendOpInfo *op_info = &request->op_info; |
| 848 | |
| 849 | if (elem->out_num < 1 || elem->in_num < 1) { |
| 850 | virtio_error(vdev, "virtio-crypto dataq missing headers"); |
| 851 | return -1; |
| 852 | } |
| 853 | |
| 854 | out_num = elem->out_num; |
| 855 | out_iov_copy = g_memdup2(elem->out_sg, sizeof(out_iov[0]) * out_num); |
| 856 | out_iov = out_iov_copy; |
| 857 | |
| 858 | in_num = elem->in_num; |
| 859 | in_iov_copy = g_memdup2(elem->in_sg, sizeof(in_iov[0]) * in_num); |
| 860 | in_iov = in_iov_copy; |
| 861 | |
| 862 | if (unlikely(iov_to_buf(out_iov, out_num, 0, &req, sizeof(req)) |
| 863 | != sizeof(req))) { |
| 864 | virtio_error(vdev, "virtio-crypto request outhdr too short"); |
| 865 | return -1; |
| 866 | } |
| 867 | iov_discard_front(&out_iov, &out_num, sizeof(req)); |
| 868 | |
| 869 | if (in_iov[in_num - 1].iov_len < |
| 870 | sizeof(struct virtio_crypto_inhdr)) { |
| 871 | virtio_error(vdev, "virtio-crypto request inhdr too short"); |
| 872 | return -1; |
| 873 | } |
| 874 | /* We always touch the last byte, so just see how big in_iov is. */ |
| 875 | request->in_len = iov_size(in_iov, in_num); |
| 876 | request->in = (void *)in_iov[in_num - 1].iov_base |
| 877 | + in_iov[in_num - 1].iov_len |
| 878 | - sizeof(struct virtio_crypto_inhdr); |
| 879 | iov_discard_back(in_iov, &in_num, sizeof(struct virtio_crypto_inhdr)); |
| 880 | |
| 881 | /* |
| 882 | * The length of operation result, including dest_data |
| 883 | * and digest_result if exists. |
| 884 | */ |
| 885 | request->in_num = in_num; |
| 886 | request->in_iov = in_iov; |
| 887 | /* now, we free the in_iov_copy inside virtio_crypto_free_request */ |
| 888 | in_iov_copy = NULL; |
| 889 | |
| 890 | opcode = ldl_le_p(&req.header.opcode); |
| 891 | op_info->session_id = ldq_le_p(&req.header.session_id); |
| 892 | op_info->op_code = opcode; |
| 893 | op_info->queue_index = queue_index; |
| 894 | op_info->cb = virtio_crypto_req_complete; |
| 895 | op_info->opaque = request; |
| 896 | |
| 897 | switch (opcode) { |
| 898 | case VIRTIO_CRYPTO_CIPHER_ENCRYPT: |
| 899 | case VIRTIO_CRYPTO_CIPHER_DECRYPT: |
| 900 | op_info->algtype = request->flags = QCRYPTODEV_BACKEND_ALGO_TYPE_SYM; |
| 901 | ret = virtio_crypto_handle_sym_req(vcrypto, |
| 902 | &req.u.sym_req, op_info, |
| 903 | out_iov, out_num); |
| 904 | goto check_result; |
| 905 | |
| 906 | case VIRTIO_CRYPTO_AKCIPHER_ENCRYPT: |
| 907 | case VIRTIO_CRYPTO_AKCIPHER_DECRYPT: |
| 908 | case VIRTIO_CRYPTO_AKCIPHER_SIGN: |
| 909 | case VIRTIO_CRYPTO_AKCIPHER_VERIFY: |
| 910 | op_info->algtype = request->flags = QCRYPTODEV_BACKEND_ALGO_TYPE_ASYM; |
| 911 | ret = virtio_crypto_handle_asym_req(vcrypto, |
| 912 | &req.u.akcipher_req, op_info, |
| 913 | out_iov, out_num); |
| 914 | |
| 915 | check_result: |
| 916 | /* Serious errors, need to reset virtio crypto device */ |
| 917 | if (ret == -EFAULT) { |
| 918 | return -1; |
| 919 | } else if (ret == -VIRTIO_CRYPTO_NOTSUPP) { |
| 920 | virtio_crypto_req_complete(request, -VIRTIO_CRYPTO_NOTSUPP); |
| 921 | } else { |
| 922 | ret = cryptodev_backend_crypto_operation(vcrypto->cryptodev, |
| 923 | op_info); |
| 924 | if (ret < 0) { |
| 925 | virtio_crypto_req_complete(request, ret); |
| 926 | } |
| 927 | } |
| 928 | break; |
| 929 | |
| 930 | case VIRTIO_CRYPTO_HASH: |
| 931 | case VIRTIO_CRYPTO_MAC: |
| 932 | case VIRTIO_CRYPTO_AEAD_ENCRYPT: |
| 933 | case VIRTIO_CRYPTO_AEAD_DECRYPT: |
| 934 | default: |
| 935 | error_report("virtio-crypto unsupported dataq opcode: %u", |
| 936 | opcode); |
| 937 | virtio_crypto_req_complete(request, -VIRTIO_CRYPTO_NOTSUPP); |
| 938 | } |
| 939 | |
| 940 | return 0; |
| 941 | } |
| 942 | |
| 943 | static void virtio_crypto_handle_dataq(VirtIODevice *vdev, VirtQueue *vq) |
| 944 | { |
| 945 | VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev); |
| 946 | VirtIOCryptoReq *req; |
| 947 | |
| 948 | while ((req = virtio_crypto_get_request(vcrypto, vq))) { |
| 949 | if (virtio_crypto_handle_request(req) < 0) { |
| 950 | virtqueue_detach_element(req->vq, &req->elem, 0); |
| 951 | virtio_crypto_free_request(req); |
| 952 | break; |
| 953 | } |
| 954 | } |
| 955 | } |
| 956 | |
| 957 | static void virtio_crypto_dataq_bh(void *opaque) |
| 958 | { |
| 959 | VirtIOCryptoQueue *q = opaque; |
| 960 | VirtIOCrypto *vcrypto = q->vcrypto; |
| 961 | VirtIODevice *vdev = VIRTIO_DEVICE(vcrypto); |
| 962 | |
| 963 | /* This happens when device was stopped but BH wasn't. */ |
| 964 | if (!vdev->vm_running) { |
| 965 | return; |
| 966 | } |
| 967 | |
| 968 | /* Just in case the driver is not ready on more */ |
| 969 | if (unlikely(!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK))) { |
| 970 | return; |
| 971 | } |
| 972 | |
| 973 | for (;;) { |
| 974 | virtio_crypto_handle_dataq(vdev, q->dataq); |
| 975 | virtio_queue_set_notification(q->dataq, 1); |
| 976 | |
| 977 | /* Are we done or did the guest add more buffers? */ |
| 978 | if (virtio_queue_empty(q->dataq)) { |
| 979 | break; |
| 980 | } |
| 981 | |
| 982 | virtio_queue_set_notification(q->dataq, 0); |
| 983 | } |
| 984 | } |
| 985 | |
| 986 | static void |
| 987 | virtio_crypto_handle_dataq_bh(VirtIODevice *vdev, VirtQueue *vq) |
| 988 | { |
| 989 | VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev); |
| 990 | VirtIOCryptoQueue *q = |
| 991 | &vcrypto->vqs[virtio_crypto_vq2q(virtio_get_queue_index(vq))]; |
| 992 | |
| 993 | /* This happens when device was stopped but VCPU wasn't. */ |
| 994 | if (!vdev->vm_running) { |
| 995 | return; |
| 996 | } |
| 997 | virtio_queue_set_notification(vq, 0); |
| 998 | qemu_bh_schedule(q->dataq_bh); |
| 999 | } |
| 1000 | |
| 1001 | static uint64_t virtio_crypto_get_features(VirtIODevice *vdev, |
| 1002 | uint64_t features, |
| 1003 | Error **errp) |
| 1004 | { |
| 1005 | return features; |
| 1006 | } |
| 1007 | |
| 1008 | static void virtio_crypto_reset(VirtIODevice *vdev) |
| 1009 | { |
| 1010 | VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev); |
| 1011 | /* multiqueue is disabled by default */ |
| 1012 | vcrypto->curr_queues = 1; |
| 1013 | if (!cryptodev_backend_is_ready(vcrypto->cryptodev)) { |
| 1014 | vcrypto->status &= ~VIRTIO_CRYPTO_S_HW_READY; |
| 1015 | } else { |
| 1016 | vcrypto->status |= VIRTIO_CRYPTO_S_HW_READY; |
| 1017 | } |
| 1018 | } |
| 1019 | |
| 1020 | static uint32_t virtio_crypto_init_services(uint32_t qservices) |
| 1021 | { |
| 1022 | uint32_t vservices = 0; |
| 1023 | |
| 1024 | if (qservices & (1 << QCRYPTODEV_BACKEND_SERVICE_TYPE_CIPHER)) { |
| 1025 | vservices |= (1 << VIRTIO_CRYPTO_SERVICE_CIPHER); |
| 1026 | } |
| 1027 | if (qservices & (1 << QCRYPTODEV_BACKEND_SERVICE_TYPE_HASH)) { |
| 1028 | vservices |= (1 << VIRTIO_CRYPTO_SERVICE_HASH); |
| 1029 | } |
| 1030 | if (qservices & (1 << QCRYPTODEV_BACKEND_SERVICE_TYPE_MAC)) { |
| 1031 | vservices |= (1 << VIRTIO_CRYPTO_SERVICE_MAC); |
| 1032 | } |
| 1033 | if (qservices & (1 << QCRYPTODEV_BACKEND_SERVICE_TYPE_AEAD)) { |
| 1034 | vservices |= (1 << VIRTIO_CRYPTO_SERVICE_AEAD); |
| 1035 | } |
| 1036 | if (qservices & (1 << QCRYPTODEV_BACKEND_SERVICE_TYPE_AKCIPHER)) { |
| 1037 | vservices |= (1 << VIRTIO_CRYPTO_SERVICE_AKCIPHER); |
| 1038 | } |
| 1039 | |
| 1040 | return vservices; |
| 1041 | } |
| 1042 | |
| 1043 | static void virtio_crypto_init_config(VirtIODevice *vdev) |
| 1044 | { |
| 1045 | VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev); |
| 1046 | |
| 1047 | vcrypto->conf.crypto_services = virtio_crypto_init_services( |
| 1048 | vcrypto->conf.cryptodev->conf.crypto_services); |
| 1049 | vcrypto->conf.cipher_algo_l = |
| 1050 | vcrypto->conf.cryptodev->conf.cipher_algo_l; |
| 1051 | vcrypto->conf.cipher_algo_h = |
| 1052 | vcrypto->conf.cryptodev->conf.cipher_algo_h; |
| 1053 | vcrypto->conf.hash_algo = vcrypto->conf.cryptodev->conf.hash_algo; |
| 1054 | vcrypto->conf.mac_algo_l = vcrypto->conf.cryptodev->conf.mac_algo_l; |
| 1055 | vcrypto->conf.mac_algo_h = vcrypto->conf.cryptodev->conf.mac_algo_h; |
| 1056 | vcrypto->conf.aead_algo = vcrypto->conf.cryptodev->conf.aead_algo; |
| 1057 | vcrypto->conf.akcipher_algo = vcrypto->conf.cryptodev->conf.akcipher_algo; |
| 1058 | vcrypto->conf.max_cipher_key_len = |
| 1059 | vcrypto->conf.cryptodev->conf.max_cipher_key_len; |
| 1060 | vcrypto->conf.max_auth_key_len = |
| 1061 | vcrypto->conf.cryptodev->conf.max_auth_key_len; |
| 1062 | vcrypto->conf.max_size = vcrypto->conf.cryptodev->conf.max_size; |
| 1063 | } |
| 1064 | |
| 1065 | static void virtio_crypto_device_realize(DeviceState *dev, Error **errp) |
| 1066 | { |
| 1067 | VirtIODevice *vdev = VIRTIO_DEVICE(dev); |
| 1068 | VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(dev); |
| 1069 | int i; |
| 1070 | |
| 1071 | vcrypto->cryptodev = vcrypto->conf.cryptodev; |
| 1072 | if (vcrypto->cryptodev == NULL) { |
| 1073 | error_setg(errp, "'cryptodev' parameter expects a valid object"); |
| 1074 | return; |
| 1075 | } else if (cryptodev_backend_is_used(vcrypto->cryptodev)) { |
| 1076 | error_setg(errp, "can't use already used cryptodev backend: %s", |
| 1077 | object_get_canonical_path_component(OBJECT(vcrypto->conf.cryptodev))); |
| 1078 | return; |
| 1079 | } |
| 1080 | |
| 1081 | vcrypto->max_queues = MAX(vcrypto->cryptodev->conf.peers.queues, 1); |
| 1082 | if (vcrypto->max_queues + 1 > VIRTIO_QUEUE_MAX) { |
| 1083 | error_setg(errp, "Invalid number of queues (= %" PRIu32 "), " |
| 1084 | "must be a positive integer less than %d.", |
| 1085 | vcrypto->max_queues, VIRTIO_QUEUE_MAX); |
| 1086 | return; |
| 1087 | } |
| 1088 | |
| 1089 | virtio_init(vdev, VIRTIO_ID_CRYPTO, vcrypto->config_size); |
| 1090 | vcrypto->curr_queues = 1; |
| 1091 | vcrypto->vqs = g_new0(VirtIOCryptoQueue, vcrypto->max_queues); |
| 1092 | for (i = 0; i < vcrypto->max_queues; i++) { |
| 1093 | vcrypto->vqs[i].dataq = |
| 1094 | virtio_add_queue(vdev, 1024, virtio_crypto_handle_dataq_bh); |
| 1095 | vcrypto->vqs[i].dataq_bh = |
| 1096 | virtio_bh_new_guarded(dev, virtio_crypto_dataq_bh, |
| 1097 | &vcrypto->vqs[i]); |
| 1098 | vcrypto->vqs[i].vcrypto = vcrypto; |
| 1099 | } |
| 1100 | |
| 1101 | vcrypto->ctrl_vq = virtio_add_queue(vdev, 1024, virtio_crypto_handle_ctrl); |
| 1102 | if (!cryptodev_backend_is_ready(vcrypto->cryptodev)) { |
| 1103 | vcrypto->status &= ~VIRTIO_CRYPTO_S_HW_READY; |
| 1104 | } else { |
| 1105 | vcrypto->status |= VIRTIO_CRYPTO_S_HW_READY; |
| 1106 | } |
| 1107 | |
| 1108 | virtio_crypto_init_config(vdev); |
| 1109 | cryptodev_backend_set_used(vcrypto->cryptodev, true); |
| 1110 | } |
| 1111 | |
| 1112 | static void virtio_crypto_device_unrealize(DeviceState *dev) |
| 1113 | { |
| 1114 | VirtIODevice *vdev = VIRTIO_DEVICE(dev); |
| 1115 | VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(dev); |
| 1116 | VirtIOCryptoQueue *q; |
| 1117 | int i, max_queues; |
| 1118 | |
| 1119 | max_queues = vcrypto->multiqueue ? vcrypto->max_queues : 1; |
| 1120 | for (i = 0; i < max_queues; i++) { |
| 1121 | virtio_delete_queue(vcrypto->vqs[i].dataq); |
| 1122 | q = &vcrypto->vqs[i]; |
| 1123 | qemu_bh_delete(q->dataq_bh); |
| 1124 | } |
| 1125 | |
| 1126 | g_free(vcrypto->vqs); |
| 1127 | virtio_delete_queue(vcrypto->ctrl_vq); |
| 1128 | |
| 1129 | virtio_cleanup(vdev); |
| 1130 | cryptodev_backend_set_used(vcrypto->cryptodev, false); |
| 1131 | } |
| 1132 | |
| 1133 | static const VMStateDescription vmstate_virtio_crypto = { |
| 1134 | .name = "virtio-crypto", |
| 1135 | .unmigratable = 1, |
| 1136 | .minimum_version_id = VIRTIO_CRYPTO_VM_VERSION, |
| 1137 | .version_id = VIRTIO_CRYPTO_VM_VERSION, |
| 1138 | .fields = (const VMStateField[]) { |
| 1139 | VMSTATE_VIRTIO_DEVICE, |
| 1140 | VMSTATE_END_OF_LIST() |
| 1141 | }, |
| 1142 | }; |
| 1143 | |
| 1144 | static const Property virtio_crypto_properties[] = { |
| 1145 | DEFINE_PROP_LINK("cryptodev", VirtIOCrypto, conf.cryptodev, |
| 1146 | TYPE_CRYPTODEV_BACKEND, CryptoDevBackend *), |
| 1147 | }; |
| 1148 | |
| 1149 | static void virtio_crypto_get_config(VirtIODevice *vdev, uint8_t *config) |
| 1150 | { |
| 1151 | VirtIOCrypto *c = VIRTIO_CRYPTO(vdev); |
| 1152 | struct virtio_crypto_config crypto_cfg = {}; |
| 1153 | |
| 1154 | /* |
| 1155 | * Virtio-crypto device conforms to VIRTIO 1.0 which is always LE, |
| 1156 | * so we can use LE accessors directly. |
| 1157 | */ |
| 1158 | stl_le_p(&crypto_cfg.status, c->status); |
| 1159 | stl_le_p(&crypto_cfg.max_dataqueues, c->max_queues); |
| 1160 | stl_le_p(&crypto_cfg.crypto_services, c->conf.crypto_services); |
| 1161 | stl_le_p(&crypto_cfg.cipher_algo_l, c->conf.cipher_algo_l); |
| 1162 | stl_le_p(&crypto_cfg.cipher_algo_h, c->conf.cipher_algo_h); |
| 1163 | stl_le_p(&crypto_cfg.hash_algo, c->conf.hash_algo); |
| 1164 | stl_le_p(&crypto_cfg.mac_algo_l, c->conf.mac_algo_l); |
| 1165 | stl_le_p(&crypto_cfg.mac_algo_h, c->conf.mac_algo_h); |
| 1166 | stl_le_p(&crypto_cfg.aead_algo, c->conf.aead_algo); |
| 1167 | stl_le_p(&crypto_cfg.max_cipher_key_len, c->conf.max_cipher_key_len); |
| 1168 | stl_le_p(&crypto_cfg.max_auth_key_len, c->conf.max_auth_key_len); |
| 1169 | stq_le_p(&crypto_cfg.max_size, c->conf.max_size); |
| 1170 | stl_le_p(&crypto_cfg.akcipher_algo, c->conf.akcipher_algo); |
| 1171 | |
| 1172 | memcpy(config, &crypto_cfg, c->config_size); |
| 1173 | } |
| 1174 | |
| 1175 | static bool virtio_crypto_started(VirtIOCrypto *c, uint8_t status) |
| 1176 | { |
| 1177 | VirtIODevice *vdev = VIRTIO_DEVICE(c); |
| 1178 | return (status & VIRTIO_CONFIG_S_DRIVER_OK) && |
| 1179 | (c->status & VIRTIO_CRYPTO_S_HW_READY) && vdev->vm_running; |
| 1180 | } |
| 1181 | |
| 1182 | static void virtio_crypto_vhost_status(VirtIOCrypto *c, uint8_t status) |
| 1183 | { |
| 1184 | VirtIODevice *vdev = VIRTIO_DEVICE(c); |
| 1185 | int queues = c->multiqueue ? c->max_queues : 1; |
| 1186 | CryptoDevBackend *b = c->cryptodev; |
| 1187 | CryptoDevBackendClient *cc = b->conf.peers.ccs[0]; |
| 1188 | |
| 1189 | if (!cryptodev_get_vhost(cc, b, 0)) { |
| 1190 | return; |
| 1191 | } |
| 1192 | |
| 1193 | if ((virtio_crypto_started(c, status)) == !!c->vhost_started) { |
| 1194 | return; |
| 1195 | } |
| 1196 | |
| 1197 | if (!c->vhost_started) { |
| 1198 | int r; |
| 1199 | |
| 1200 | c->vhost_started = 1; |
| 1201 | r = cryptodev_vhost_start(vdev, queues); |
| 1202 | if (r < 0) { |
| 1203 | error_report("unable to start vhost crypto: %d: " |
| 1204 | "falling back on userspace virtio", -r); |
| 1205 | c->vhost_started = 0; |
| 1206 | } |
| 1207 | } else { |
| 1208 | cryptodev_vhost_stop(vdev, queues); |
| 1209 | c->vhost_started = 0; |
| 1210 | } |
| 1211 | } |
| 1212 | |
| 1213 | static int virtio_crypto_set_status(VirtIODevice *vdev, uint8_t status) |
| 1214 | { |
| 1215 | VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev); |
| 1216 | |
| 1217 | virtio_crypto_vhost_status(vcrypto, status); |
| 1218 | return 0; |
| 1219 | } |
| 1220 | |
| 1221 | static void virtio_crypto_guest_notifier_mask(VirtIODevice *vdev, int idx, |
| 1222 | bool mask) |
| 1223 | { |
| 1224 | VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev); |
| 1225 | int queue = virtio_crypto_vq2q(idx); |
| 1226 | |
| 1227 | assert(vcrypto->vhost_started); |
| 1228 | |
| 1229 | /* |
| 1230 | * Add the check for configure interrupt, Use VIRTIO_CONFIG_IRQ_IDX -1 |
| 1231 | * as the macro of configure interrupt's IDX, If this driver does not |
| 1232 | * support, the function will return |
| 1233 | */ |
| 1234 | |
| 1235 | if (idx == VIRTIO_CONFIG_IRQ_IDX) { |
| 1236 | return; |
| 1237 | } |
| 1238 | cryptodev_vhost_virtqueue_mask(vdev, queue, idx, mask); |
| 1239 | } |
| 1240 | |
| 1241 | static bool virtio_crypto_guest_notifier_pending(VirtIODevice *vdev, int idx) |
| 1242 | { |
| 1243 | VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev); |
| 1244 | int queue = virtio_crypto_vq2q(idx); |
| 1245 | |
| 1246 | assert(vcrypto->vhost_started); |
| 1247 | |
| 1248 | /* |
| 1249 | * Add the check for configure interrupt, Use VIRTIO_CONFIG_IRQ_IDX -1 |
| 1250 | * as the macro of configure interrupt's IDX, If this driver does not |
| 1251 | * support, the function will return |
| 1252 | */ |
| 1253 | |
| 1254 | if (idx == VIRTIO_CONFIG_IRQ_IDX) { |
| 1255 | return false; |
| 1256 | } |
| 1257 | return cryptodev_vhost_virtqueue_pending(vdev, queue, idx); |
| 1258 | } |
| 1259 | |
| 1260 | static struct vhost_dev *virtio_crypto_get_vhost(VirtIODevice *vdev) |
| 1261 | { |
| 1262 | VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev); |
| 1263 | CryptoDevBackend *b; |
| 1264 | CryptoDevBackendClient *cc; |
| 1265 | CryptoDevBackendVhost *vhost_crypto; |
| 1266 | |
| 1267 | b = vcrypto->cryptodev; |
| 1268 | if (!b) { |
| 1269 | return NULL; |
| 1270 | } |
| 1271 | |
| 1272 | cc = b->conf.peers.ccs[0]; |
| 1273 | vhost_crypto = cryptodev_get_vhost(cc, b, 0); |
| 1274 | if (!vhost_crypto) { |
| 1275 | return NULL; |
| 1276 | } |
| 1277 | |
| 1278 | return &vhost_crypto->dev; |
| 1279 | } |
| 1280 | |
| 1281 | static void virtio_crypto_class_init(ObjectClass *klass, const void *data) |
| 1282 | { |
| 1283 | DeviceClass *dc = DEVICE_CLASS(klass); |
| 1284 | VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); |
| 1285 | |
| 1286 | device_class_set_props(dc, virtio_crypto_properties); |
| 1287 | dc->vmsd = &vmstate_virtio_crypto; |
| 1288 | set_bit(DEVICE_CATEGORY_MISC, dc->categories); |
| 1289 | vdc->realize = virtio_crypto_device_realize; |
| 1290 | vdc->unrealize = virtio_crypto_device_unrealize; |
| 1291 | vdc->get_config = virtio_crypto_get_config; |
| 1292 | vdc->get_features = virtio_crypto_get_features; |
| 1293 | vdc->reset = virtio_crypto_reset; |
| 1294 | vdc->set_status = virtio_crypto_set_status; |
| 1295 | vdc->guest_notifier_mask = virtio_crypto_guest_notifier_mask; |
| 1296 | vdc->guest_notifier_pending = virtio_crypto_guest_notifier_pending; |
| 1297 | vdc->get_vhost = virtio_crypto_get_vhost; |
| 1298 | } |
| 1299 | |
| 1300 | static void virtio_crypto_instance_init(Object *obj) |
| 1301 | { |
| 1302 | VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(obj); |
| 1303 | |
| 1304 | /* |
| 1305 | * The default config_size is sizeof(struct virtio_crypto_config). |
| 1306 | * Can be overridden with virtio_crypto_set_config_size. |
| 1307 | */ |
| 1308 | vcrypto->config_size = sizeof(struct virtio_crypto_config); |
| 1309 | } |
| 1310 | |
| 1311 | static const TypeInfo virtio_crypto_info = { |
| 1312 | .name = TYPE_VIRTIO_CRYPTO, |
| 1313 | .parent = TYPE_VIRTIO_DEVICE, |
| 1314 | .instance_size = sizeof(VirtIOCrypto), |
| 1315 | .instance_init = virtio_crypto_instance_init, |
| 1316 | .class_init = virtio_crypto_class_init, |
| 1317 | }; |
| 1318 | |
| 1319 | static void virtio_register_types(void) |
| 1320 | { |
| 1321 | type_register_static(&virtio_crypto_info); |
| 1322 | } |
| 1323 | |
| 1324 | type_init(virtio_register_types) |