microvm/acpi: disable virtio-mmio cmdline hack
[qemu.git] / backends / cryptodev-vhost-user.c
1 /*
2 * QEMU Cryptodev backend for QEMU cipher APIs
3 *
4 * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
5 *
6 * Authors:
7 * Gonglei <arei.gonglei@huawei.com>
8 *
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2 of the License, or (at your option) any later version.
13 *
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
21 *
22 */
23
24 #include "qemu/osdep.h"
25 #include "qapi/error.h"
26 #include "qapi/qmp/qerror.h"
27 #include "qemu/error-report.h"
28 #include "hw/virtio/vhost-user.h"
29 #include "standard-headers/linux/virtio_crypto.h"
30 #include "sysemu/cryptodev-vhost.h"
31 #include "chardev/char-fe.h"
32 #include "sysemu/cryptodev-vhost-user.h"
33 #include "qom/object.h"
34
35
36 /**
37 * @TYPE_CRYPTODEV_BACKEND_VHOST_USER:
38 * name of backend that uses vhost user server
39 */
40 #define TYPE_CRYPTODEV_BACKEND_VHOST_USER "cryptodev-vhost-user"
41
42 typedef struct CryptoDevBackendVhostUser CryptoDevBackendVhostUser;
43 DECLARE_INSTANCE_CHECKER(CryptoDevBackendVhostUser, CRYPTODEV_BACKEND_VHOST_USER,
44 TYPE_CRYPTODEV_BACKEND_VHOST_USER)
45
46
47 struct CryptoDevBackendVhostUser {
48 CryptoDevBackend parent_obj;
49
50 VhostUserState vhost_user;
51 CharBackend chr;
52 char *chr_name;
53 bool opened;
54 CryptoDevBackendVhost *vhost_crypto[MAX_CRYPTO_QUEUE_NUM];
55 };
56
57 static int
58 cryptodev_vhost_user_running(
59 CryptoDevBackendVhost *crypto)
60 {
61 return crypto ? 1 : 0;
62 }
63
64 CryptoDevBackendVhost *
65 cryptodev_vhost_user_get_vhost(
66 CryptoDevBackendClient *cc,
67 CryptoDevBackend *b,
68 uint16_t queue)
69 {
70 CryptoDevBackendVhostUser *s =
71 CRYPTODEV_BACKEND_VHOST_USER(b);
72 assert(cc->type == CRYPTODEV_BACKEND_TYPE_VHOST_USER);
73 assert(queue < MAX_CRYPTO_QUEUE_NUM);
74
75 return s->vhost_crypto[queue];
76 }
77
78 static void cryptodev_vhost_user_stop(int queues,
79 CryptoDevBackendVhostUser *s)
80 {
81 size_t i;
82
83 for (i = 0; i < queues; i++) {
84 if (!cryptodev_vhost_user_running(s->vhost_crypto[i])) {
85 continue;
86 }
87
88 cryptodev_vhost_cleanup(s->vhost_crypto[i]);
89 s->vhost_crypto[i] = NULL;
90 }
91 }
92
93 static int
94 cryptodev_vhost_user_start(int queues,
95 CryptoDevBackendVhostUser *s)
96 {
97 CryptoDevBackendVhostOptions options;
98 CryptoDevBackend *b = CRYPTODEV_BACKEND(s);
99 int max_queues;
100 size_t i;
101
102 for (i = 0; i < queues; i++) {
103 if (cryptodev_vhost_user_running(s->vhost_crypto[i])) {
104 continue;
105 }
106
107 options.opaque = &s->vhost_user;
108 options.backend_type = VHOST_BACKEND_TYPE_USER;
109 options.cc = b->conf.peers.ccs[i];
110 s->vhost_crypto[i] = cryptodev_vhost_init(&options);
111 if (!s->vhost_crypto[i]) {
112 error_report("failed to init vhost_crypto for queue %zu", i);
113 goto err;
114 }
115
116 if (i == 0) {
117 max_queues =
118 cryptodev_vhost_get_max_queues(s->vhost_crypto[i]);
119 if (queues > max_queues) {
120 error_report("you are asking more queues than supported: %d",
121 max_queues);
122 goto err;
123 }
124 }
125 }
126
127 return 0;
128
129 err:
130 cryptodev_vhost_user_stop(i + 1, s);
131 return -1;
132 }
133
134 static Chardev *
135 cryptodev_vhost_claim_chardev(CryptoDevBackendVhostUser *s,
136 Error **errp)
137 {
138 Chardev *chr;
139
140 if (s->chr_name == NULL) {
141 error_setg(errp, QERR_INVALID_PARAMETER_VALUE,
142 "chardev", "a valid character device");
143 return NULL;
144 }
145
146 chr = qemu_chr_find(s->chr_name);
147 if (chr == NULL) {
148 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
149 "Device '%s' not found", s->chr_name);
150 return NULL;
151 }
152
153 return chr;
154 }
155
156 static void cryptodev_vhost_user_event(void *opaque, QEMUChrEvent event)
157 {
158 CryptoDevBackendVhostUser *s = opaque;
159 CryptoDevBackend *b = CRYPTODEV_BACKEND(s);
160 int queues = b->conf.peers.queues;
161
162 assert(queues < MAX_CRYPTO_QUEUE_NUM);
163
164 switch (event) {
165 case CHR_EVENT_OPENED:
166 if (cryptodev_vhost_user_start(queues, s) < 0) {
167 exit(1);
168 }
169 b->ready = true;
170 break;
171 case CHR_EVENT_CLOSED:
172 b->ready = false;
173 cryptodev_vhost_user_stop(queues, s);
174 break;
175 case CHR_EVENT_BREAK:
176 case CHR_EVENT_MUX_IN:
177 case CHR_EVENT_MUX_OUT:
178 /* Ignore */
179 break;
180 }
181 }
182
183 static void cryptodev_vhost_user_init(
184 CryptoDevBackend *backend, Error **errp)
185 {
186 int queues = backend->conf.peers.queues;
187 size_t i;
188 Error *local_err = NULL;
189 Chardev *chr;
190 CryptoDevBackendClient *cc;
191 CryptoDevBackendVhostUser *s =
192 CRYPTODEV_BACKEND_VHOST_USER(backend);
193
194 chr = cryptodev_vhost_claim_chardev(s, &local_err);
195 if (local_err) {
196 error_propagate(errp, local_err);
197 return;
198 }
199
200 s->opened = true;
201
202 for (i = 0; i < queues; i++) {
203 cc = cryptodev_backend_new_client(
204 "cryptodev-vhost-user", NULL);
205 cc->info_str = g_strdup_printf("cryptodev-vhost-user%zu to %s ",
206 i, chr->label);
207 cc->queue_index = i;
208 cc->type = CRYPTODEV_BACKEND_TYPE_VHOST_USER;
209
210 backend->conf.peers.ccs[i] = cc;
211
212 if (i == 0) {
213 if (!qemu_chr_fe_init(&s->chr, chr, errp)) {
214 return;
215 }
216 }
217 }
218
219 if (!vhost_user_init(&s->vhost_user, &s->chr, errp)) {
220 return;
221 }
222
223 qemu_chr_fe_set_handlers(&s->chr, NULL, NULL,
224 cryptodev_vhost_user_event, NULL, s, NULL, true);
225
226 backend->conf.crypto_services =
227 1u << VIRTIO_CRYPTO_SERVICE_CIPHER |
228 1u << VIRTIO_CRYPTO_SERVICE_HASH |
229 1u << VIRTIO_CRYPTO_SERVICE_MAC;
230 backend->conf.cipher_algo_l = 1u << VIRTIO_CRYPTO_CIPHER_AES_CBC;
231 backend->conf.hash_algo = 1u << VIRTIO_CRYPTO_HASH_SHA1;
232
233 backend->conf.max_size = UINT64_MAX;
234 backend->conf.max_cipher_key_len = VHOST_USER_MAX_CIPHER_KEY_LEN;
235 backend->conf.max_auth_key_len = VHOST_USER_MAX_AUTH_KEY_LEN;
236 }
237
238 static int64_t cryptodev_vhost_user_sym_create_session(
239 CryptoDevBackend *backend,
240 CryptoDevBackendSymSessionInfo *sess_info,
241 uint32_t queue_index, Error **errp)
242 {
243 CryptoDevBackendClient *cc =
244 backend->conf.peers.ccs[queue_index];
245 CryptoDevBackendVhost *vhost_crypto;
246 uint64_t session_id = 0;
247 int ret;
248
249 vhost_crypto = cryptodev_vhost_user_get_vhost(cc, backend, queue_index);
250 if (vhost_crypto) {
251 struct vhost_dev *dev = &(vhost_crypto->dev);
252 ret = dev->vhost_ops->vhost_crypto_create_session(dev,
253 sess_info,
254 &session_id);
255 if (ret < 0) {
256 return -1;
257 } else {
258 return session_id;
259 }
260 }
261 return -1;
262 }
263
264 static int cryptodev_vhost_user_sym_close_session(
265 CryptoDevBackend *backend,
266 uint64_t session_id,
267 uint32_t queue_index, Error **errp)
268 {
269 CryptoDevBackendClient *cc =
270 backend->conf.peers.ccs[queue_index];
271 CryptoDevBackendVhost *vhost_crypto;
272 int ret;
273
274 vhost_crypto = cryptodev_vhost_user_get_vhost(cc, backend, queue_index);
275 if (vhost_crypto) {
276 struct vhost_dev *dev = &(vhost_crypto->dev);
277 ret = dev->vhost_ops->vhost_crypto_close_session(dev,
278 session_id);
279 if (ret < 0) {
280 return -1;
281 } else {
282 return 0;
283 }
284 }
285 return -1;
286 }
287
288 static void cryptodev_vhost_user_cleanup(
289 CryptoDevBackend *backend,
290 Error **errp)
291 {
292 CryptoDevBackendVhostUser *s =
293 CRYPTODEV_BACKEND_VHOST_USER(backend);
294 size_t i;
295 int queues = backend->conf.peers.queues;
296 CryptoDevBackendClient *cc;
297
298 cryptodev_vhost_user_stop(queues, s);
299
300 for (i = 0; i < queues; i++) {
301 cc = backend->conf.peers.ccs[i];
302 if (cc) {
303 cryptodev_backend_free_client(cc);
304 backend->conf.peers.ccs[i] = NULL;
305 }
306 }
307
308 vhost_user_cleanup(&s->vhost_user);
309 }
310
311 static void cryptodev_vhost_user_set_chardev(Object *obj,
312 const char *value, Error **errp)
313 {
314 CryptoDevBackendVhostUser *s =
315 CRYPTODEV_BACKEND_VHOST_USER(obj);
316
317 if (s->opened) {
318 error_setg(errp, QERR_PERMISSION_DENIED);
319 } else {
320 g_free(s->chr_name);
321 s->chr_name = g_strdup(value);
322 }
323 }
324
325 static char *
326 cryptodev_vhost_user_get_chardev(Object *obj, Error **errp)
327 {
328 CryptoDevBackendVhostUser *s =
329 CRYPTODEV_BACKEND_VHOST_USER(obj);
330 Chardev *chr = qemu_chr_fe_get_driver(&s->chr);
331
332 if (chr && chr->label) {
333 return g_strdup(chr->label);
334 }
335
336 return NULL;
337 }
338
339 static void cryptodev_vhost_user_instance_int(Object *obj)
340 {
341 object_property_add_str(obj, "chardev",
342 cryptodev_vhost_user_get_chardev,
343 cryptodev_vhost_user_set_chardev);
344 }
345
346 static void cryptodev_vhost_user_finalize(Object *obj)
347 {
348 CryptoDevBackendVhostUser *s =
349 CRYPTODEV_BACKEND_VHOST_USER(obj);
350
351 qemu_chr_fe_deinit(&s->chr, false);
352
353 g_free(s->chr_name);
354 }
355
356 static void
357 cryptodev_vhost_user_class_init(ObjectClass *oc, void *data)
358 {
359 CryptoDevBackendClass *bc = CRYPTODEV_BACKEND_CLASS(oc);
360
361 bc->init = cryptodev_vhost_user_init;
362 bc->cleanup = cryptodev_vhost_user_cleanup;
363 bc->create_session = cryptodev_vhost_user_sym_create_session;
364 bc->close_session = cryptodev_vhost_user_sym_close_session;
365 bc->do_sym_op = NULL;
366 }
367
368 static const TypeInfo cryptodev_vhost_user_info = {
369 .name = TYPE_CRYPTODEV_BACKEND_VHOST_USER,
370 .parent = TYPE_CRYPTODEV_BACKEND,
371 .class_init = cryptodev_vhost_user_class_init,
372 .instance_init = cryptodev_vhost_user_instance_int,
373 .instance_finalize = cryptodev_vhost_user_finalize,
374 .instance_size = sizeof(CryptoDevBackendVhostUser),
375 };
376
377 static void
378 cryptodev_vhost_user_register_types(void)
379 {
380 type_register_static(&cryptodev_vhost_user_info);
381 }
382
383 type_init(cryptodev_vhost_user_register_types);