Gonglei | ea4d8ac | 2016-10-28 16:33:24 +0800 | [diff] [blame] | 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 | #include "qemu/osdep.h" |
| 14 | #include "qemu/iov.h" |
| 15 | #include "hw/qdev.h" |
| 16 | #include "qapi/error.h" |
| 17 | #include "qemu/error-report.h" |
| 18 | |
| 19 | #include "hw/virtio/virtio.h" |
| 20 | #include "hw/virtio/virtio-crypto.h" |
| 21 | #include "hw/virtio/virtio-access.h" |
| 22 | #include "standard-headers/linux/virtio_ids.h" |
Gonglei | 5da73da | 2018-03-01 21:46:29 +0800 | [diff] [blame] | 23 | #include "sysemu/cryptodev-vhost.h" |
Gonglei | ea4d8ac | 2016-10-28 16:33:24 +0800 | [diff] [blame] | 24 | |
| 25 | #define VIRTIO_CRYPTO_VM_VERSION 1 |
| 26 | |
Gonglei | 59c360c | 2016-10-28 16:33:27 +0800 | [diff] [blame] | 27 | /* |
| 28 | * Transfer virtqueue index to crypto queue index. |
| 29 | * The control virtqueue is after the data virtqueues |
| 30 | * so the input value doesn't need to be adjusted |
| 31 | */ |
| 32 | static inline int virtio_crypto_vq2q(int queue_index) |
| 33 | { |
| 34 | return queue_index; |
| 35 | } |
| 36 | |
| 37 | static int |
| 38 | virtio_crypto_cipher_session_helper(VirtIODevice *vdev, |
| 39 | CryptoDevBackendSymSessionInfo *info, |
| 40 | struct virtio_crypto_cipher_session_para *cipher_para, |
| 41 | struct iovec **iov, unsigned int *out_num) |
| 42 | { |
| 43 | VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev); |
| 44 | unsigned int num = *out_num; |
| 45 | |
| 46 | info->cipher_alg = ldl_le_p(&cipher_para->algo); |
| 47 | info->key_len = ldl_le_p(&cipher_para->keylen); |
| 48 | info->direction = ldl_le_p(&cipher_para->op); |
| 49 | DPRINTF("cipher_alg=%" PRIu32 ", info->direction=%" PRIu32 "\n", |
| 50 | info->cipher_alg, info->direction); |
| 51 | |
| 52 | if (info->key_len > vcrypto->conf.max_cipher_key_len) { |
| 53 | error_report("virtio-crypto length of cipher key is too big: %u", |
| 54 | info->key_len); |
| 55 | return -VIRTIO_CRYPTO_ERR; |
| 56 | } |
| 57 | /* Get cipher key */ |
| 58 | if (info->key_len > 0) { |
| 59 | size_t s; |
| 60 | DPRINTF("keylen=%" PRIu32 "\n", info->key_len); |
| 61 | |
| 62 | info->cipher_key = g_malloc(info->key_len); |
| 63 | s = iov_to_buf(*iov, num, 0, info->cipher_key, info->key_len); |
| 64 | if (unlikely(s != info->key_len)) { |
| 65 | virtio_error(vdev, "virtio-crypto cipher key incorrect"); |
| 66 | return -EFAULT; |
| 67 | } |
| 68 | iov_discard_front(iov, &num, info->key_len); |
| 69 | *out_num = num; |
| 70 | } |
| 71 | |
| 72 | return 0; |
| 73 | } |
| 74 | |
| 75 | static int64_t |
| 76 | virtio_crypto_create_sym_session(VirtIOCrypto *vcrypto, |
| 77 | struct virtio_crypto_sym_create_session_req *sess_req, |
| 78 | uint32_t queue_id, |
| 79 | uint32_t opcode, |
| 80 | struct iovec *iov, unsigned int out_num) |
| 81 | { |
| 82 | VirtIODevice *vdev = VIRTIO_DEVICE(vcrypto); |
| 83 | CryptoDevBackendSymSessionInfo info; |
| 84 | int64_t session_id; |
| 85 | int queue_index; |
| 86 | uint32_t op_type; |
| 87 | Error *local_err = NULL; |
| 88 | int ret; |
| 89 | |
| 90 | memset(&info, 0, sizeof(info)); |
| 91 | op_type = ldl_le_p(&sess_req->op_type); |
| 92 | info.op_type = op_type; |
| 93 | info.op_code = opcode; |
| 94 | |
| 95 | if (op_type == VIRTIO_CRYPTO_SYM_OP_CIPHER) { |
| 96 | ret = virtio_crypto_cipher_session_helper(vdev, &info, |
| 97 | &sess_req->u.cipher.para, |
| 98 | &iov, &out_num); |
| 99 | if (ret < 0) { |
| 100 | goto err; |
| 101 | } |
| 102 | } else if (op_type == VIRTIO_CRYPTO_SYM_OP_ALGORITHM_CHAINING) { |
| 103 | size_t s; |
| 104 | /* cipher part */ |
| 105 | ret = virtio_crypto_cipher_session_helper(vdev, &info, |
| 106 | &sess_req->u.chain.para.cipher_param, |
| 107 | &iov, &out_num); |
| 108 | if (ret < 0) { |
| 109 | goto err; |
| 110 | } |
| 111 | /* hash part */ |
| 112 | info.alg_chain_order = ldl_le_p( |
| 113 | &sess_req->u.chain.para.alg_chain_order); |
| 114 | info.add_len = ldl_le_p(&sess_req->u.chain.para.aad_len); |
| 115 | info.hash_mode = ldl_le_p(&sess_req->u.chain.para.hash_mode); |
| 116 | if (info.hash_mode == VIRTIO_CRYPTO_SYM_HASH_MODE_AUTH) { |
| 117 | info.hash_alg = ldl_le_p(&sess_req->u.chain.para.u.mac_param.algo); |
| 118 | info.auth_key_len = ldl_le_p( |
| 119 | &sess_req->u.chain.para.u.mac_param.auth_key_len); |
| 120 | info.hash_result_len = ldl_le_p( |
| 121 | &sess_req->u.chain.para.u.mac_param.hash_result_len); |
| 122 | if (info.auth_key_len > vcrypto->conf.max_auth_key_len) { |
| 123 | error_report("virtio-crypto length of auth key is too big: %u", |
| 124 | info.auth_key_len); |
| 125 | ret = -VIRTIO_CRYPTO_ERR; |
| 126 | goto err; |
| 127 | } |
| 128 | /* get auth key */ |
| 129 | if (info.auth_key_len > 0) { |
| 130 | DPRINTF("auth_keylen=%" PRIu32 "\n", info.auth_key_len); |
| 131 | info.auth_key = g_malloc(info.auth_key_len); |
| 132 | s = iov_to_buf(iov, out_num, 0, info.auth_key, |
| 133 | info.auth_key_len); |
| 134 | if (unlikely(s != info.auth_key_len)) { |
| 135 | virtio_error(vdev, |
| 136 | "virtio-crypto authenticated key incorrect"); |
| 137 | ret = -EFAULT; |
| 138 | goto err; |
| 139 | } |
| 140 | iov_discard_front(&iov, &out_num, info.auth_key_len); |
| 141 | } |
| 142 | } else if (info.hash_mode == VIRTIO_CRYPTO_SYM_HASH_MODE_PLAIN) { |
| 143 | info.hash_alg = ldl_le_p( |
| 144 | &sess_req->u.chain.para.u.hash_param.algo); |
| 145 | info.hash_result_len = ldl_le_p( |
| 146 | &sess_req->u.chain.para.u.hash_param.hash_result_len); |
| 147 | } else { |
| 148 | /* VIRTIO_CRYPTO_SYM_HASH_MODE_NESTED */ |
| 149 | error_report("unsupported hash mode"); |
| 150 | ret = -VIRTIO_CRYPTO_NOTSUPP; |
| 151 | goto err; |
| 152 | } |
| 153 | } else { |
| 154 | /* VIRTIO_CRYPTO_SYM_OP_NONE */ |
| 155 | error_report("unsupported cipher op_type: VIRTIO_CRYPTO_SYM_OP_NONE"); |
| 156 | ret = -VIRTIO_CRYPTO_NOTSUPP; |
| 157 | goto err; |
| 158 | } |
| 159 | |
| 160 | queue_index = virtio_crypto_vq2q(queue_id); |
| 161 | session_id = cryptodev_backend_sym_create_session( |
| 162 | vcrypto->cryptodev, |
| 163 | &info, queue_index, &local_err); |
| 164 | if (session_id >= 0) { |
| 165 | DPRINTF("create session_id=%" PRIu64 " successfully\n", |
| 166 | session_id); |
| 167 | |
| 168 | ret = session_id; |
| 169 | } else { |
| 170 | if (local_err) { |
| 171 | error_report_err(local_err); |
| 172 | } |
| 173 | ret = -VIRTIO_CRYPTO_ERR; |
| 174 | } |
| 175 | |
| 176 | err: |
| 177 | g_free(info.cipher_key); |
| 178 | g_free(info.auth_key); |
| 179 | return ret; |
| 180 | } |
| 181 | |
| 182 | static uint8_t |
| 183 | virtio_crypto_handle_close_session(VirtIOCrypto *vcrypto, |
| 184 | struct virtio_crypto_destroy_session_req *close_sess_req, |
| 185 | uint32_t queue_id) |
| 186 | { |
| 187 | int ret; |
| 188 | uint64_t session_id; |
| 189 | uint32_t status; |
| 190 | Error *local_err = NULL; |
| 191 | |
| 192 | session_id = ldq_le_p(&close_sess_req->session_id); |
| 193 | DPRINTF("close session, id=%" PRIu64 "\n", session_id); |
| 194 | |
| 195 | ret = cryptodev_backend_sym_close_session( |
| 196 | vcrypto->cryptodev, session_id, queue_id, &local_err); |
| 197 | if (ret == 0) { |
| 198 | status = VIRTIO_CRYPTO_OK; |
| 199 | } else { |
| 200 | if (local_err) { |
| 201 | error_report_err(local_err); |
| 202 | } else { |
| 203 | error_report("destroy session failed"); |
| 204 | } |
| 205 | status = VIRTIO_CRYPTO_ERR; |
| 206 | } |
| 207 | |
| 208 | return status; |
| 209 | } |
| 210 | |
| 211 | static void virtio_crypto_handle_ctrl(VirtIODevice *vdev, VirtQueue *vq) |
| 212 | { |
| 213 | VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev); |
| 214 | struct virtio_crypto_op_ctrl_req ctrl; |
| 215 | VirtQueueElement *elem; |
| 216 | struct iovec *in_iov; |
| 217 | struct iovec *out_iov; |
| 218 | unsigned in_num; |
| 219 | unsigned out_num; |
| 220 | uint32_t queue_id; |
| 221 | uint32_t opcode; |
| 222 | struct virtio_crypto_session_input input; |
| 223 | int64_t session_id; |
| 224 | uint8_t status; |
| 225 | size_t s; |
| 226 | |
| 227 | for (;;) { |
| 228 | elem = virtqueue_pop(vq, sizeof(VirtQueueElement)); |
| 229 | if (!elem) { |
| 230 | break; |
| 231 | } |
| 232 | if (elem->out_num < 1 || elem->in_num < 1) { |
| 233 | virtio_error(vdev, "virtio-crypto ctrl missing headers"); |
| 234 | virtqueue_detach_element(vq, elem, 0); |
| 235 | g_free(elem); |
| 236 | break; |
| 237 | } |
| 238 | |
| 239 | out_num = elem->out_num; |
| 240 | out_iov = elem->out_sg; |
| 241 | in_num = elem->in_num; |
| 242 | in_iov = elem->in_sg; |
| 243 | if (unlikely(iov_to_buf(out_iov, out_num, 0, &ctrl, sizeof(ctrl)) |
| 244 | != sizeof(ctrl))) { |
| 245 | virtio_error(vdev, "virtio-crypto request ctrl_hdr too short"); |
| 246 | virtqueue_detach_element(vq, elem, 0); |
| 247 | g_free(elem); |
| 248 | break; |
| 249 | } |
| 250 | iov_discard_front(&out_iov, &out_num, sizeof(ctrl)); |
| 251 | |
| 252 | opcode = ldl_le_p(&ctrl.header.opcode); |
| 253 | queue_id = ldl_le_p(&ctrl.header.queue_id); |
| 254 | |
| 255 | switch (opcode) { |
| 256 | case VIRTIO_CRYPTO_CIPHER_CREATE_SESSION: |
| 257 | memset(&input, 0, sizeof(input)); |
| 258 | session_id = virtio_crypto_create_sym_session(vcrypto, |
| 259 | &ctrl.u.sym_create_session, |
| 260 | queue_id, opcode, |
| 261 | out_iov, out_num); |
| 262 | /* Serious errors, need to reset virtio crypto device */ |
| 263 | if (session_id == -EFAULT) { |
| 264 | virtqueue_detach_element(vq, elem, 0); |
| 265 | break; |
| 266 | } else if (session_id == -VIRTIO_CRYPTO_NOTSUPP) { |
| 267 | stl_le_p(&input.status, VIRTIO_CRYPTO_NOTSUPP); |
| 268 | } else if (session_id == -VIRTIO_CRYPTO_ERR) { |
| 269 | stl_le_p(&input.status, VIRTIO_CRYPTO_ERR); |
| 270 | } else { |
| 271 | /* Set the session id */ |
| 272 | stq_le_p(&input.session_id, session_id); |
| 273 | stl_le_p(&input.status, VIRTIO_CRYPTO_OK); |
| 274 | } |
| 275 | |
| 276 | s = iov_from_buf(in_iov, in_num, 0, &input, sizeof(input)); |
| 277 | if (unlikely(s != sizeof(input))) { |
| 278 | virtio_error(vdev, "virtio-crypto input incorrect"); |
| 279 | virtqueue_detach_element(vq, elem, 0); |
| 280 | break; |
| 281 | } |
| 282 | virtqueue_push(vq, elem, sizeof(input)); |
| 283 | virtio_notify(vdev, vq); |
| 284 | break; |
| 285 | case VIRTIO_CRYPTO_CIPHER_DESTROY_SESSION: |
| 286 | case VIRTIO_CRYPTO_HASH_DESTROY_SESSION: |
| 287 | case VIRTIO_CRYPTO_MAC_DESTROY_SESSION: |
| 288 | case VIRTIO_CRYPTO_AEAD_DESTROY_SESSION: |
| 289 | status = virtio_crypto_handle_close_session(vcrypto, |
| 290 | &ctrl.u.destroy_session, queue_id); |
| 291 | /* The status only occupy one byte, we can directly use it */ |
| 292 | s = iov_from_buf(in_iov, in_num, 0, &status, sizeof(status)); |
| 293 | if (unlikely(s != sizeof(status))) { |
| 294 | virtio_error(vdev, "virtio-crypto status incorrect"); |
| 295 | virtqueue_detach_element(vq, elem, 0); |
| 296 | break; |
| 297 | } |
| 298 | virtqueue_push(vq, elem, sizeof(status)); |
| 299 | virtio_notify(vdev, vq); |
| 300 | break; |
| 301 | case VIRTIO_CRYPTO_HASH_CREATE_SESSION: |
| 302 | case VIRTIO_CRYPTO_MAC_CREATE_SESSION: |
| 303 | case VIRTIO_CRYPTO_AEAD_CREATE_SESSION: |
| 304 | default: |
| 305 | error_report("virtio-crypto unsupported ctrl opcode: %d", opcode); |
| 306 | memset(&input, 0, sizeof(input)); |
| 307 | stl_le_p(&input.status, VIRTIO_CRYPTO_NOTSUPP); |
| 308 | s = iov_from_buf(in_iov, in_num, 0, &input, sizeof(input)); |
| 309 | if (unlikely(s != sizeof(input))) { |
| 310 | virtio_error(vdev, "virtio-crypto input incorrect"); |
| 311 | virtqueue_detach_element(vq, elem, 0); |
| 312 | break; |
| 313 | } |
| 314 | virtqueue_push(vq, elem, sizeof(input)); |
| 315 | virtio_notify(vdev, vq); |
| 316 | |
| 317 | break; |
| 318 | } /* end switch case */ |
| 319 | |
| 320 | g_free(elem); |
| 321 | } /* end for loop */ |
| 322 | } |
| 323 | |
Gonglei | 04b9b37 | 2016-10-28 16:33:28 +0800 | [diff] [blame] | 324 | static void virtio_crypto_init_request(VirtIOCrypto *vcrypto, VirtQueue *vq, |
| 325 | VirtIOCryptoReq *req) |
| 326 | { |
| 327 | req->vcrypto = vcrypto; |
| 328 | req->vq = vq; |
| 329 | req->in = NULL; |
| 330 | req->in_iov = NULL; |
| 331 | req->in_num = 0; |
| 332 | req->in_len = 0; |
| 333 | req->flags = CRYPTODEV_BACKEND_ALG__MAX; |
| 334 | req->u.sym_op_info = NULL; |
| 335 | } |
| 336 | |
| 337 | static void virtio_crypto_free_request(VirtIOCryptoReq *req) |
| 338 | { |
| 339 | if (req) { |
| 340 | if (req->flags == CRYPTODEV_BACKEND_ALG_SYM) { |
Gonglei | 02ed3e7 | 2016-12-22 11:01:28 +0800 | [diff] [blame] | 341 | size_t max_len; |
| 342 | CryptoDevBackendSymOpInfo *op_info = req->u.sym_op_info; |
| 343 | |
| 344 | max_len = op_info->iv_len + |
| 345 | op_info->aad_len + |
| 346 | op_info->src_len + |
| 347 | op_info->dst_len + |
| 348 | op_info->digest_result_len; |
| 349 | |
| 350 | /* Zeroize and free request data structure */ |
| 351 | memset(op_info, 0, sizeof(*op_info) + max_len); |
| 352 | g_free(op_info); |
Gonglei | 04b9b37 | 2016-10-28 16:33:28 +0800 | [diff] [blame] | 353 | } |
| 354 | g_free(req); |
| 355 | } |
| 356 | } |
| 357 | |
| 358 | static void |
| 359 | virtio_crypto_sym_input_data_helper(VirtIODevice *vdev, |
| 360 | VirtIOCryptoReq *req, |
| 361 | uint32_t status, |
| 362 | CryptoDevBackendSymOpInfo *sym_op_info) |
| 363 | { |
| 364 | size_t s, len; |
| 365 | |
| 366 | if (status != VIRTIO_CRYPTO_OK) { |
| 367 | return; |
| 368 | } |
| 369 | |
Gonglei | c159a4d | 2016-12-22 11:37:03 +0800 | [diff] [blame] | 370 | len = sym_op_info->src_len; |
Gonglei | 04b9b37 | 2016-10-28 16:33:28 +0800 | [diff] [blame] | 371 | /* Save the cipher result */ |
| 372 | s = iov_from_buf(req->in_iov, req->in_num, 0, sym_op_info->dst, len); |
| 373 | if (s != len) { |
| 374 | virtio_error(vdev, "virtio-crypto dest data incorrect"); |
| 375 | return; |
| 376 | } |
| 377 | |
| 378 | iov_discard_front(&req->in_iov, &req->in_num, len); |
| 379 | |
| 380 | if (sym_op_info->op_type == |
| 381 | VIRTIO_CRYPTO_SYM_OP_ALGORITHM_CHAINING) { |
| 382 | /* Save the digest result */ |
| 383 | s = iov_from_buf(req->in_iov, req->in_num, 0, |
| 384 | sym_op_info->digest_result, |
| 385 | sym_op_info->digest_result_len); |
| 386 | if (s != sym_op_info->digest_result_len) { |
| 387 | virtio_error(vdev, "virtio-crypto digest result incorrect"); |
| 388 | } |
| 389 | } |
| 390 | } |
| 391 | |
| 392 | static void virtio_crypto_req_complete(VirtIOCryptoReq *req, uint8_t status) |
| 393 | { |
| 394 | VirtIOCrypto *vcrypto = req->vcrypto; |
| 395 | VirtIODevice *vdev = VIRTIO_DEVICE(vcrypto); |
| 396 | |
| 397 | if (req->flags == CRYPTODEV_BACKEND_ALG_SYM) { |
| 398 | virtio_crypto_sym_input_data_helper(vdev, req, status, |
| 399 | req->u.sym_op_info); |
| 400 | } |
| 401 | stb_p(&req->in->status, status); |
| 402 | virtqueue_push(req->vq, &req->elem, req->in_len); |
| 403 | virtio_notify(vdev, req->vq); |
| 404 | } |
| 405 | |
| 406 | static VirtIOCryptoReq * |
| 407 | virtio_crypto_get_request(VirtIOCrypto *s, VirtQueue *vq) |
| 408 | { |
| 409 | VirtIOCryptoReq *req = virtqueue_pop(vq, sizeof(VirtIOCryptoReq)); |
| 410 | |
| 411 | if (req) { |
| 412 | virtio_crypto_init_request(s, vq, req); |
| 413 | } |
| 414 | return req; |
| 415 | } |
| 416 | |
| 417 | static CryptoDevBackendSymOpInfo * |
| 418 | virtio_crypto_sym_op_helper(VirtIODevice *vdev, |
| 419 | struct virtio_crypto_cipher_para *cipher_para, |
| 420 | struct virtio_crypto_alg_chain_data_para *alg_chain_para, |
| 421 | struct iovec *iov, unsigned int out_num) |
| 422 | { |
| 423 | VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev); |
| 424 | CryptoDevBackendSymOpInfo *op_info; |
| 425 | uint32_t src_len = 0, dst_len = 0; |
| 426 | uint32_t iv_len = 0; |
| 427 | uint32_t aad_len = 0, hash_result_len = 0; |
| 428 | uint32_t hash_start_src_offset = 0, len_to_hash = 0; |
| 429 | uint32_t cipher_start_src_offset = 0, len_to_cipher = 0; |
| 430 | |
Gonglei | a08aaff | 2017-01-03 14:50:03 +0800 | [diff] [blame] | 431 | uint64_t max_len, curr_size = 0; |
Gonglei | 04b9b37 | 2016-10-28 16:33:28 +0800 | [diff] [blame] | 432 | size_t s; |
| 433 | |
| 434 | /* Plain cipher */ |
| 435 | if (cipher_para) { |
| 436 | iv_len = ldl_le_p(&cipher_para->iv_len); |
| 437 | src_len = ldl_le_p(&cipher_para->src_data_len); |
| 438 | dst_len = ldl_le_p(&cipher_para->dst_data_len); |
| 439 | } else if (alg_chain_para) { /* Algorithm chain */ |
| 440 | iv_len = ldl_le_p(&alg_chain_para->iv_len); |
| 441 | src_len = ldl_le_p(&alg_chain_para->src_data_len); |
| 442 | dst_len = ldl_le_p(&alg_chain_para->dst_data_len); |
| 443 | |
| 444 | aad_len = ldl_le_p(&alg_chain_para->aad_len); |
| 445 | hash_result_len = ldl_le_p(&alg_chain_para->hash_result_len); |
| 446 | hash_start_src_offset = ldl_le_p( |
| 447 | &alg_chain_para->hash_start_src_offset); |
| 448 | cipher_start_src_offset = ldl_le_p( |
| 449 | &alg_chain_para->cipher_start_src_offset); |
| 450 | len_to_cipher = ldl_le_p(&alg_chain_para->len_to_cipher); |
| 451 | len_to_hash = ldl_le_p(&alg_chain_para->len_to_hash); |
| 452 | } else { |
| 453 | return NULL; |
| 454 | } |
| 455 | |
Gonglei | a08aaff | 2017-01-03 14:50:03 +0800 | [diff] [blame] | 456 | max_len = (uint64_t)iv_len + aad_len + src_len + dst_len + hash_result_len; |
Gonglei | 04b9b37 | 2016-10-28 16:33:28 +0800 | [diff] [blame] | 457 | if (unlikely(max_len > vcrypto->conf.max_size)) { |
| 458 | virtio_error(vdev, "virtio-crypto too big length"); |
| 459 | return NULL; |
| 460 | } |
| 461 | |
| 462 | op_info = g_malloc0(sizeof(CryptoDevBackendSymOpInfo) + max_len); |
| 463 | op_info->iv_len = iv_len; |
| 464 | op_info->src_len = src_len; |
| 465 | op_info->dst_len = dst_len; |
| 466 | op_info->aad_len = aad_len; |
| 467 | op_info->digest_result_len = hash_result_len; |
| 468 | op_info->hash_start_src_offset = hash_start_src_offset; |
| 469 | op_info->len_to_hash = len_to_hash; |
| 470 | op_info->cipher_start_src_offset = cipher_start_src_offset; |
| 471 | op_info->len_to_cipher = len_to_cipher; |
| 472 | /* Handle the initilization vector */ |
| 473 | if (op_info->iv_len > 0) { |
| 474 | DPRINTF("iv_len=%" PRIu32 "\n", op_info->iv_len); |
| 475 | op_info->iv = op_info->data + curr_size; |
| 476 | |
| 477 | s = iov_to_buf(iov, out_num, 0, op_info->iv, op_info->iv_len); |
| 478 | if (unlikely(s != op_info->iv_len)) { |
| 479 | virtio_error(vdev, "virtio-crypto iv incorrect"); |
| 480 | goto err; |
| 481 | } |
| 482 | iov_discard_front(&iov, &out_num, op_info->iv_len); |
| 483 | curr_size += op_info->iv_len; |
| 484 | } |
| 485 | |
| 486 | /* Handle additional authentication data if exists */ |
| 487 | if (op_info->aad_len > 0) { |
| 488 | DPRINTF("aad_len=%" PRIu32 "\n", op_info->aad_len); |
| 489 | op_info->aad_data = op_info->data + curr_size; |
| 490 | |
| 491 | s = iov_to_buf(iov, out_num, 0, op_info->aad_data, op_info->aad_len); |
| 492 | if (unlikely(s != op_info->aad_len)) { |
| 493 | virtio_error(vdev, "virtio-crypto additional auth data incorrect"); |
| 494 | goto err; |
| 495 | } |
| 496 | iov_discard_front(&iov, &out_num, op_info->aad_len); |
| 497 | |
| 498 | curr_size += op_info->aad_len; |
| 499 | } |
| 500 | |
| 501 | /* Handle the source data */ |
| 502 | if (op_info->src_len > 0) { |
| 503 | DPRINTF("src_len=%" PRIu32 "\n", op_info->src_len); |
| 504 | op_info->src = op_info->data + curr_size; |
| 505 | |
| 506 | s = iov_to_buf(iov, out_num, 0, op_info->src, op_info->src_len); |
| 507 | if (unlikely(s != op_info->src_len)) { |
| 508 | virtio_error(vdev, "virtio-crypto source data incorrect"); |
| 509 | goto err; |
| 510 | } |
| 511 | iov_discard_front(&iov, &out_num, op_info->src_len); |
| 512 | |
| 513 | curr_size += op_info->src_len; |
| 514 | } |
| 515 | |
| 516 | /* Handle the destination data */ |
| 517 | op_info->dst = op_info->data + curr_size; |
| 518 | curr_size += op_info->dst_len; |
| 519 | |
| 520 | DPRINTF("dst_len=%" PRIu32 "\n", op_info->dst_len); |
| 521 | |
| 522 | /* Handle the hash digest result */ |
| 523 | if (hash_result_len > 0) { |
| 524 | DPRINTF("hash_result_len=%" PRIu32 "\n", hash_result_len); |
| 525 | op_info->digest_result = op_info->data + curr_size; |
| 526 | } |
| 527 | |
| 528 | return op_info; |
| 529 | |
| 530 | err: |
| 531 | g_free(op_info); |
| 532 | return NULL; |
| 533 | } |
| 534 | |
| 535 | static int |
| 536 | virtio_crypto_handle_sym_req(VirtIOCrypto *vcrypto, |
| 537 | struct virtio_crypto_sym_data_req *req, |
| 538 | CryptoDevBackendSymOpInfo **sym_op_info, |
| 539 | struct iovec *iov, unsigned int out_num) |
| 540 | { |
| 541 | VirtIODevice *vdev = VIRTIO_DEVICE(vcrypto); |
| 542 | uint32_t op_type; |
| 543 | CryptoDevBackendSymOpInfo *op_info; |
| 544 | |
| 545 | op_type = ldl_le_p(&req->op_type); |
| 546 | |
| 547 | if (op_type == VIRTIO_CRYPTO_SYM_OP_CIPHER) { |
| 548 | op_info = virtio_crypto_sym_op_helper(vdev, &req->u.cipher.para, |
| 549 | NULL, iov, out_num); |
| 550 | if (!op_info) { |
| 551 | return -EFAULT; |
| 552 | } |
| 553 | op_info->op_type = op_type; |
| 554 | } else if (op_type == VIRTIO_CRYPTO_SYM_OP_ALGORITHM_CHAINING) { |
| 555 | op_info = virtio_crypto_sym_op_helper(vdev, NULL, |
| 556 | &req->u.chain.para, |
| 557 | iov, out_num); |
| 558 | if (!op_info) { |
| 559 | return -EFAULT; |
| 560 | } |
| 561 | op_info->op_type = op_type; |
| 562 | } else { |
| 563 | /* VIRTIO_CRYPTO_SYM_OP_NONE */ |
| 564 | error_report("virtio-crypto unsupported cipher type"); |
| 565 | return -VIRTIO_CRYPTO_NOTSUPP; |
| 566 | } |
| 567 | |
| 568 | *sym_op_info = op_info; |
| 569 | |
| 570 | return 0; |
| 571 | } |
| 572 | |
| 573 | static int |
| 574 | virtio_crypto_handle_request(VirtIOCryptoReq *request) |
| 575 | { |
| 576 | VirtIOCrypto *vcrypto = request->vcrypto; |
| 577 | VirtIODevice *vdev = VIRTIO_DEVICE(vcrypto); |
| 578 | VirtQueueElement *elem = &request->elem; |
| 579 | int queue_index = virtio_crypto_vq2q(virtio_get_queue_index(request->vq)); |
| 580 | struct virtio_crypto_op_data_req req; |
| 581 | int ret; |
| 582 | struct iovec *in_iov; |
| 583 | struct iovec *out_iov; |
| 584 | unsigned in_num; |
| 585 | unsigned out_num; |
| 586 | uint32_t opcode; |
| 587 | uint8_t status = VIRTIO_CRYPTO_ERR; |
| 588 | uint64_t session_id; |
| 589 | CryptoDevBackendSymOpInfo *sym_op_info = NULL; |
| 590 | Error *local_err = NULL; |
| 591 | |
| 592 | if (elem->out_num < 1 || elem->in_num < 1) { |
| 593 | virtio_error(vdev, "virtio-crypto dataq missing headers"); |
| 594 | return -1; |
| 595 | } |
| 596 | |
| 597 | out_num = elem->out_num; |
| 598 | out_iov = elem->out_sg; |
| 599 | in_num = elem->in_num; |
| 600 | in_iov = elem->in_sg; |
| 601 | if (unlikely(iov_to_buf(out_iov, out_num, 0, &req, sizeof(req)) |
| 602 | != sizeof(req))) { |
| 603 | virtio_error(vdev, "virtio-crypto request outhdr too short"); |
| 604 | return -1; |
| 605 | } |
| 606 | iov_discard_front(&out_iov, &out_num, sizeof(req)); |
| 607 | |
| 608 | if (in_iov[in_num - 1].iov_len < |
| 609 | sizeof(struct virtio_crypto_inhdr)) { |
| 610 | virtio_error(vdev, "virtio-crypto request inhdr too short"); |
| 611 | return -1; |
| 612 | } |
| 613 | /* We always touch the last byte, so just see how big in_iov is. */ |
| 614 | request->in_len = iov_size(in_iov, in_num); |
| 615 | request->in = (void *)in_iov[in_num - 1].iov_base |
| 616 | + in_iov[in_num - 1].iov_len |
| 617 | - sizeof(struct virtio_crypto_inhdr); |
| 618 | iov_discard_back(in_iov, &in_num, sizeof(struct virtio_crypto_inhdr)); |
| 619 | |
| 620 | /* |
| 621 | * The length of operation result, including dest_data |
| 622 | * and digest_result if exists. |
| 623 | */ |
| 624 | request->in_num = in_num; |
| 625 | request->in_iov = in_iov; |
| 626 | |
| 627 | opcode = ldl_le_p(&req.header.opcode); |
| 628 | session_id = ldq_le_p(&req.header.session_id); |
| 629 | |
| 630 | switch (opcode) { |
| 631 | case VIRTIO_CRYPTO_CIPHER_ENCRYPT: |
| 632 | case VIRTIO_CRYPTO_CIPHER_DECRYPT: |
| 633 | ret = virtio_crypto_handle_sym_req(vcrypto, |
| 634 | &req.u.sym_req, |
| 635 | &sym_op_info, |
| 636 | out_iov, out_num); |
| 637 | /* Serious errors, need to reset virtio crypto device */ |
| 638 | if (ret == -EFAULT) { |
| 639 | return -1; |
| 640 | } else if (ret == -VIRTIO_CRYPTO_NOTSUPP) { |
| 641 | virtio_crypto_req_complete(request, VIRTIO_CRYPTO_NOTSUPP); |
| 642 | virtio_crypto_free_request(request); |
| 643 | } else { |
| 644 | sym_op_info->session_id = session_id; |
| 645 | |
| 646 | /* Set request's parameter */ |
| 647 | request->flags = CRYPTODEV_BACKEND_ALG_SYM; |
| 648 | request->u.sym_op_info = sym_op_info; |
Gonglei | d6634ac | 2016-10-28 16:33:29 +0800 | [diff] [blame] | 649 | ret = cryptodev_backend_crypto_operation(vcrypto->cryptodev, |
| 650 | request, queue_index, &local_err); |
Gonglei | 04b9b37 | 2016-10-28 16:33:28 +0800 | [diff] [blame] | 651 | if (ret < 0) { |
Gonglei | d6634ac | 2016-10-28 16:33:29 +0800 | [diff] [blame] | 652 | status = -ret; |
Gonglei | 04b9b37 | 2016-10-28 16:33:28 +0800 | [diff] [blame] | 653 | if (local_err) { |
| 654 | error_report_err(local_err); |
| 655 | } |
Gonglei | d6634ac | 2016-10-28 16:33:29 +0800 | [diff] [blame] | 656 | } else { /* ret == VIRTIO_CRYPTO_OK */ |
| 657 | status = ret; |
Gonglei | 04b9b37 | 2016-10-28 16:33:28 +0800 | [diff] [blame] | 658 | } |
| 659 | virtio_crypto_req_complete(request, status); |
| 660 | virtio_crypto_free_request(request); |
| 661 | } |
| 662 | break; |
| 663 | case VIRTIO_CRYPTO_HASH: |
| 664 | case VIRTIO_CRYPTO_MAC: |
| 665 | case VIRTIO_CRYPTO_AEAD_ENCRYPT: |
| 666 | case VIRTIO_CRYPTO_AEAD_DECRYPT: |
| 667 | default: |
| 668 | error_report("virtio-crypto unsupported dataq opcode: %u", |
| 669 | opcode); |
| 670 | virtio_crypto_req_complete(request, VIRTIO_CRYPTO_NOTSUPP); |
| 671 | virtio_crypto_free_request(request); |
| 672 | } |
| 673 | |
| 674 | return 0; |
| 675 | } |
| 676 | |
| 677 | static void virtio_crypto_handle_dataq(VirtIODevice *vdev, VirtQueue *vq) |
| 678 | { |
| 679 | VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev); |
| 680 | VirtIOCryptoReq *req; |
| 681 | |
| 682 | while ((req = virtio_crypto_get_request(vcrypto, vq))) { |
| 683 | if (virtio_crypto_handle_request(req) < 0) { |
| 684 | virtqueue_detach_element(req->vq, &req->elem, 0); |
| 685 | virtio_crypto_free_request(req); |
| 686 | break; |
| 687 | } |
| 688 | } |
| 689 | } |
| 690 | |
Gonglei | 20cb2ff | 2016-10-28 16:33:30 +0800 | [diff] [blame] | 691 | static void virtio_crypto_dataq_bh(void *opaque) |
| 692 | { |
| 693 | VirtIOCryptoQueue *q = opaque; |
| 694 | VirtIOCrypto *vcrypto = q->vcrypto; |
| 695 | VirtIODevice *vdev = VIRTIO_DEVICE(vcrypto); |
| 696 | |
| 697 | /* This happens when device was stopped but BH wasn't. */ |
| 698 | if (!vdev->vm_running) { |
| 699 | return; |
| 700 | } |
| 701 | |
| 702 | /* Just in case the driver is not ready on more */ |
| 703 | if (unlikely(!(vdev->status & VIRTIO_CONFIG_S_DRIVER_OK))) { |
| 704 | return; |
| 705 | } |
| 706 | |
Stefan Hajnoczi | 600f5ce | 2016-11-16 20:17:32 +0000 | [diff] [blame] | 707 | for (;;) { |
| 708 | virtio_crypto_handle_dataq(vdev, q->dataq); |
| 709 | virtio_queue_set_notification(q->dataq, 1); |
| 710 | |
| 711 | /* Are we done or did the guest add more buffers? */ |
| 712 | if (virtio_queue_empty(q->dataq)) { |
| 713 | break; |
| 714 | } |
| 715 | |
| 716 | virtio_queue_set_notification(q->dataq, 0); |
| 717 | } |
Gonglei | 20cb2ff | 2016-10-28 16:33:30 +0800 | [diff] [blame] | 718 | } |
| 719 | |
| 720 | static void |
| 721 | virtio_crypto_handle_dataq_bh(VirtIODevice *vdev, VirtQueue *vq) |
| 722 | { |
| 723 | VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev); |
| 724 | VirtIOCryptoQueue *q = |
| 725 | &vcrypto->vqs[virtio_crypto_vq2q(virtio_get_queue_index(vq))]; |
| 726 | |
| 727 | /* This happens when device was stopped but VCPU wasn't. */ |
| 728 | if (!vdev->vm_running) { |
| 729 | return; |
| 730 | } |
| 731 | virtio_queue_set_notification(vq, 0); |
| 732 | qemu_bh_schedule(q->dataq_bh); |
| 733 | } |
| 734 | |
Gonglei | ea4d8ac | 2016-10-28 16:33:24 +0800 | [diff] [blame] | 735 | static uint64_t virtio_crypto_get_features(VirtIODevice *vdev, |
| 736 | uint64_t features, |
| 737 | Error **errp) |
| 738 | { |
| 739 | return features; |
| 740 | } |
| 741 | |
| 742 | static void virtio_crypto_reset(VirtIODevice *vdev) |
| 743 | { |
| 744 | VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev); |
| 745 | /* multiqueue is disabled by default */ |
| 746 | vcrypto->curr_queues = 1; |
Gonglei | 6138dbd | 2016-12-22 11:12:39 +0800 | [diff] [blame] | 747 | if (!cryptodev_backend_is_ready(vcrypto->cryptodev)) { |
Gonglei | ea4d8ac | 2016-10-28 16:33:24 +0800 | [diff] [blame] | 748 | vcrypto->status &= ~VIRTIO_CRYPTO_S_HW_READY; |
| 749 | } else { |
| 750 | vcrypto->status |= VIRTIO_CRYPTO_S_HW_READY; |
| 751 | } |
| 752 | } |
| 753 | |
Gonglei | 050652d | 2016-10-28 16:33:26 +0800 | [diff] [blame] | 754 | static void virtio_crypto_init_config(VirtIODevice *vdev) |
| 755 | { |
| 756 | VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev); |
| 757 | |
| 758 | vcrypto->conf.crypto_services = |
| 759 | vcrypto->conf.cryptodev->conf.crypto_services; |
| 760 | vcrypto->conf.cipher_algo_l = |
| 761 | vcrypto->conf.cryptodev->conf.cipher_algo_l; |
| 762 | vcrypto->conf.cipher_algo_h = |
| 763 | vcrypto->conf.cryptodev->conf.cipher_algo_h; |
| 764 | vcrypto->conf.hash_algo = vcrypto->conf.cryptodev->conf.hash_algo; |
| 765 | vcrypto->conf.mac_algo_l = vcrypto->conf.cryptodev->conf.mac_algo_l; |
| 766 | vcrypto->conf.mac_algo_h = vcrypto->conf.cryptodev->conf.mac_algo_h; |
| 767 | vcrypto->conf.aead_algo = vcrypto->conf.cryptodev->conf.aead_algo; |
| 768 | vcrypto->conf.max_cipher_key_len = |
| 769 | vcrypto->conf.cryptodev->conf.max_cipher_key_len; |
| 770 | vcrypto->conf.max_auth_key_len = |
| 771 | vcrypto->conf.cryptodev->conf.max_auth_key_len; |
| 772 | vcrypto->conf.max_size = vcrypto->conf.cryptodev->conf.max_size; |
| 773 | } |
| 774 | |
Gonglei | ea4d8ac | 2016-10-28 16:33:24 +0800 | [diff] [blame] | 775 | static void virtio_crypto_device_realize(DeviceState *dev, Error **errp) |
| 776 | { |
| 777 | VirtIODevice *vdev = VIRTIO_DEVICE(dev); |
| 778 | VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(dev); |
| 779 | int i; |
| 780 | |
| 781 | vcrypto->cryptodev = vcrypto->conf.cryptodev; |
| 782 | if (vcrypto->cryptodev == NULL) { |
| 783 | error_setg(errp, "'cryptodev' parameter expects a valid object"); |
| 784 | return; |
Fam Zheng | aa8f057 | 2017-07-14 10:14:58 +0800 | [diff] [blame] | 785 | } else if (cryptodev_backend_is_used(vcrypto->cryptodev)) { |
| 786 | char *path = object_get_canonical_path_component(OBJECT(vcrypto->conf.cryptodev)); |
| 787 | error_setg(errp, "can't use already used cryptodev backend: %s", path); |
| 788 | g_free(path); |
| 789 | return; |
Gonglei | ea4d8ac | 2016-10-28 16:33:24 +0800 | [diff] [blame] | 790 | } |
| 791 | |
| 792 | vcrypto->max_queues = MAX(vcrypto->cryptodev->conf.peers.queues, 1); |
| 793 | if (vcrypto->max_queues + 1 > VIRTIO_QUEUE_MAX) { |
| 794 | error_setg(errp, "Invalid number of queues (= %" PRIu32 "), " |
Stefan Weil | b12227a | 2016-11-19 20:29:26 +0100 | [diff] [blame] | 795 | "must be a positive integer less than %d.", |
Gonglei | ea4d8ac | 2016-10-28 16:33:24 +0800 | [diff] [blame] | 796 | vcrypto->max_queues, VIRTIO_QUEUE_MAX); |
| 797 | return; |
| 798 | } |
| 799 | |
| 800 | virtio_init(vdev, "virtio-crypto", VIRTIO_ID_CRYPTO, vcrypto->config_size); |
| 801 | vcrypto->curr_queues = 1; |
Gonglei | 20cb2ff | 2016-10-28 16:33:30 +0800 | [diff] [blame] | 802 | vcrypto->vqs = g_malloc0(sizeof(VirtIOCryptoQueue) * vcrypto->max_queues); |
Gonglei | ea4d8ac | 2016-10-28 16:33:24 +0800 | [diff] [blame] | 803 | for (i = 0; i < vcrypto->max_queues; i++) { |
Gonglei | 20cb2ff | 2016-10-28 16:33:30 +0800 | [diff] [blame] | 804 | vcrypto->vqs[i].dataq = |
| 805 | virtio_add_queue(vdev, 1024, virtio_crypto_handle_dataq_bh); |
| 806 | vcrypto->vqs[i].dataq_bh = |
| 807 | qemu_bh_new(virtio_crypto_dataq_bh, &vcrypto->vqs[i]); |
| 808 | vcrypto->vqs[i].vcrypto = vcrypto; |
Gonglei | ea4d8ac | 2016-10-28 16:33:24 +0800 | [diff] [blame] | 809 | } |
| 810 | |
Gonglei | 59c360c | 2016-10-28 16:33:27 +0800 | [diff] [blame] | 811 | vcrypto->ctrl_vq = virtio_add_queue(vdev, 64, virtio_crypto_handle_ctrl); |
Gonglei | 6138dbd | 2016-12-22 11:12:39 +0800 | [diff] [blame] | 812 | if (!cryptodev_backend_is_ready(vcrypto->cryptodev)) { |
Gonglei | ea4d8ac | 2016-10-28 16:33:24 +0800 | [diff] [blame] | 813 | vcrypto->status &= ~VIRTIO_CRYPTO_S_HW_READY; |
| 814 | } else { |
| 815 | vcrypto->status |= VIRTIO_CRYPTO_S_HW_READY; |
| 816 | } |
Gonglei | 050652d | 2016-10-28 16:33:26 +0800 | [diff] [blame] | 817 | |
| 818 | virtio_crypto_init_config(vdev); |
Gonglei | 46fd170 | 2016-12-22 11:12:38 +0800 | [diff] [blame] | 819 | cryptodev_backend_set_used(vcrypto->cryptodev, true); |
Gonglei | ea4d8ac | 2016-10-28 16:33:24 +0800 | [diff] [blame] | 820 | } |
| 821 | |
| 822 | static void virtio_crypto_device_unrealize(DeviceState *dev, Error **errp) |
| 823 | { |
| 824 | VirtIODevice *vdev = VIRTIO_DEVICE(dev); |
Gonglei | 20cb2ff | 2016-10-28 16:33:30 +0800 | [diff] [blame] | 825 | VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(dev); |
| 826 | VirtIOCryptoQueue *q; |
| 827 | int i, max_queues; |
| 828 | |
| 829 | max_queues = vcrypto->multiqueue ? vcrypto->max_queues : 1; |
| 830 | for (i = 0; i < max_queues; i++) { |
| 831 | virtio_del_queue(vdev, i); |
| 832 | q = &vcrypto->vqs[i]; |
| 833 | qemu_bh_delete(q->dataq_bh); |
| 834 | } |
| 835 | |
| 836 | g_free(vcrypto->vqs); |
Gonglei | ea4d8ac | 2016-10-28 16:33:24 +0800 | [diff] [blame] | 837 | |
| 838 | virtio_cleanup(vdev); |
Gonglei | 46fd170 | 2016-12-22 11:12:38 +0800 | [diff] [blame] | 839 | cryptodev_backend_set_used(vcrypto->cryptodev, false); |
Gonglei | ea4d8ac | 2016-10-28 16:33:24 +0800 | [diff] [blame] | 840 | } |
| 841 | |
| 842 | static const VMStateDescription vmstate_virtio_crypto = { |
| 843 | .name = "virtio-crypto", |
Gonglei | 6e724d9 | 2016-10-31 22:08:00 +0800 | [diff] [blame] | 844 | .unmigratable = 1, |
Gonglei | ea4d8ac | 2016-10-28 16:33:24 +0800 | [diff] [blame] | 845 | .minimum_version_id = VIRTIO_CRYPTO_VM_VERSION, |
| 846 | .version_id = VIRTIO_CRYPTO_VM_VERSION, |
| 847 | .fields = (VMStateField[]) { |
| 848 | VMSTATE_VIRTIO_DEVICE, |
| 849 | VMSTATE_END_OF_LIST() |
| 850 | }, |
| 851 | }; |
| 852 | |
| 853 | static Property virtio_crypto_properties[] = { |
Fam Zheng | aa8f057 | 2017-07-14 10:14:58 +0800 | [diff] [blame] | 854 | DEFINE_PROP_LINK("cryptodev", VirtIOCrypto, conf.cryptodev, |
| 855 | TYPE_CRYPTODEV_BACKEND, CryptoDevBackend *), |
Gonglei | ea4d8ac | 2016-10-28 16:33:24 +0800 | [diff] [blame] | 856 | DEFINE_PROP_END_OF_LIST(), |
| 857 | }; |
| 858 | |
| 859 | static void virtio_crypto_get_config(VirtIODevice *vdev, uint8_t *config) |
| 860 | { |
Gonglei | 050652d | 2016-10-28 16:33:26 +0800 | [diff] [blame] | 861 | VirtIOCrypto *c = VIRTIO_CRYPTO(vdev); |
Gonglei | 9730280 | 2016-11-26 11:07:55 +0800 | [diff] [blame] | 862 | struct virtio_crypto_config crypto_cfg = {}; |
Gonglei | ea4d8ac | 2016-10-28 16:33:24 +0800 | [diff] [blame] | 863 | |
Gonglei | 050652d | 2016-10-28 16:33:26 +0800 | [diff] [blame] | 864 | /* |
| 865 | * Virtio-crypto device conforms to VIRTIO 1.0 which is always LE, |
| 866 | * so we can use LE accessors directly. |
| 867 | */ |
| 868 | stl_le_p(&crypto_cfg.status, c->status); |
| 869 | stl_le_p(&crypto_cfg.max_dataqueues, c->max_queues); |
| 870 | stl_le_p(&crypto_cfg.crypto_services, c->conf.crypto_services); |
| 871 | stl_le_p(&crypto_cfg.cipher_algo_l, c->conf.cipher_algo_l); |
| 872 | stl_le_p(&crypto_cfg.cipher_algo_h, c->conf.cipher_algo_h); |
| 873 | stl_le_p(&crypto_cfg.hash_algo, c->conf.hash_algo); |
| 874 | stl_le_p(&crypto_cfg.mac_algo_l, c->conf.mac_algo_l); |
| 875 | stl_le_p(&crypto_cfg.mac_algo_h, c->conf.mac_algo_h); |
| 876 | stl_le_p(&crypto_cfg.aead_algo, c->conf.aead_algo); |
| 877 | stl_le_p(&crypto_cfg.max_cipher_key_len, c->conf.max_cipher_key_len); |
| 878 | stl_le_p(&crypto_cfg.max_auth_key_len, c->conf.max_auth_key_len); |
| 879 | stq_le_p(&crypto_cfg.max_size, c->conf.max_size); |
| 880 | |
| 881 | memcpy(config, &crypto_cfg, c->config_size); |
Gonglei | ea4d8ac | 2016-10-28 16:33:24 +0800 | [diff] [blame] | 882 | } |
| 883 | |
Gonglei | 5da73da | 2018-03-01 21:46:29 +0800 | [diff] [blame] | 884 | static bool virtio_crypto_started(VirtIOCrypto *c, uint8_t status) |
| 885 | { |
| 886 | VirtIODevice *vdev = VIRTIO_DEVICE(c); |
| 887 | return (status & VIRTIO_CONFIG_S_DRIVER_OK) && |
| 888 | (c->status & VIRTIO_CRYPTO_S_HW_READY) && vdev->vm_running; |
| 889 | } |
| 890 | |
| 891 | static void virtio_crypto_vhost_status(VirtIOCrypto *c, uint8_t status) |
| 892 | { |
| 893 | VirtIODevice *vdev = VIRTIO_DEVICE(c); |
| 894 | int queues = c->multiqueue ? c->max_queues : 1; |
| 895 | CryptoDevBackend *b = c->cryptodev; |
| 896 | CryptoDevBackendClient *cc = b->conf.peers.ccs[0]; |
| 897 | |
| 898 | if (!cryptodev_get_vhost(cc, b, 0)) { |
| 899 | return; |
| 900 | } |
| 901 | |
| 902 | if ((virtio_crypto_started(c, status)) == !!c->vhost_started) { |
| 903 | return; |
| 904 | } |
| 905 | |
| 906 | if (!c->vhost_started) { |
| 907 | int r; |
| 908 | |
| 909 | c->vhost_started = 1; |
| 910 | r = cryptodev_vhost_start(vdev, queues); |
| 911 | if (r < 0) { |
| 912 | error_report("unable to start vhost crypto: %d: " |
| 913 | "falling back on userspace virtio", -r); |
| 914 | c->vhost_started = 0; |
| 915 | } |
| 916 | } else { |
| 917 | cryptodev_vhost_stop(vdev, queues); |
| 918 | c->vhost_started = 0; |
| 919 | } |
| 920 | } |
| 921 | |
| 922 | static void virtio_crypto_set_status(VirtIODevice *vdev, uint8_t status) |
| 923 | { |
| 924 | VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev); |
| 925 | |
| 926 | virtio_crypto_vhost_status(vcrypto, status); |
| 927 | } |
| 928 | |
| 929 | static void virtio_crypto_guest_notifier_mask(VirtIODevice *vdev, int idx, |
| 930 | bool mask) |
| 931 | { |
| 932 | VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev); |
| 933 | int queue = virtio_crypto_vq2q(idx); |
| 934 | |
| 935 | assert(vcrypto->vhost_started); |
| 936 | |
| 937 | cryptodev_vhost_virtqueue_mask(vdev, queue, idx, mask); |
| 938 | } |
| 939 | |
| 940 | static bool virtio_crypto_guest_notifier_pending(VirtIODevice *vdev, int idx) |
| 941 | { |
| 942 | VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(vdev); |
| 943 | int queue = virtio_crypto_vq2q(idx); |
| 944 | |
| 945 | assert(vcrypto->vhost_started); |
| 946 | |
| 947 | return cryptodev_vhost_virtqueue_pending(vdev, queue, idx); |
| 948 | } |
| 949 | |
Gonglei | ea4d8ac | 2016-10-28 16:33:24 +0800 | [diff] [blame] | 950 | static void virtio_crypto_class_init(ObjectClass *klass, void *data) |
| 951 | { |
| 952 | DeviceClass *dc = DEVICE_CLASS(klass); |
| 953 | VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); |
| 954 | |
| 955 | dc->props = virtio_crypto_properties; |
| 956 | dc->vmsd = &vmstate_virtio_crypto; |
| 957 | set_bit(DEVICE_CATEGORY_MISC, dc->categories); |
| 958 | vdc->realize = virtio_crypto_device_realize; |
| 959 | vdc->unrealize = virtio_crypto_device_unrealize; |
| 960 | vdc->get_config = virtio_crypto_get_config; |
| 961 | vdc->get_features = virtio_crypto_get_features; |
| 962 | vdc->reset = virtio_crypto_reset; |
Gonglei | 5da73da | 2018-03-01 21:46:29 +0800 | [diff] [blame] | 963 | vdc->set_status = virtio_crypto_set_status; |
| 964 | vdc->guest_notifier_mask = virtio_crypto_guest_notifier_mask; |
| 965 | vdc->guest_notifier_pending = virtio_crypto_guest_notifier_pending; |
Gonglei | ea4d8ac | 2016-10-28 16:33:24 +0800 | [diff] [blame] | 966 | } |
| 967 | |
| 968 | static void virtio_crypto_instance_init(Object *obj) |
| 969 | { |
| 970 | VirtIOCrypto *vcrypto = VIRTIO_CRYPTO(obj); |
| 971 | |
| 972 | /* |
| 973 | * The default config_size is sizeof(struct virtio_crypto_config). |
| 974 | * Can be overriden with virtio_crypto_set_config_size. |
| 975 | */ |
| 976 | vcrypto->config_size = sizeof(struct virtio_crypto_config); |
Gonglei | ea4d8ac | 2016-10-28 16:33:24 +0800 | [diff] [blame] | 977 | } |
| 978 | |
| 979 | static const TypeInfo virtio_crypto_info = { |
| 980 | .name = TYPE_VIRTIO_CRYPTO, |
| 981 | .parent = TYPE_VIRTIO_DEVICE, |
| 982 | .instance_size = sizeof(VirtIOCrypto), |
| 983 | .instance_init = virtio_crypto_instance_init, |
| 984 | .class_init = virtio_crypto_class_init, |
| 985 | }; |
| 986 | |
| 987 | static void virtio_register_types(void) |
| 988 | { |
| 989 | type_register_static(&virtio_crypto_info); |
| 990 | } |
| 991 | |
| 992 | type_init(virtio_register_types) |