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