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4549a8b7 SB |
1 | /* |
2 | * passthrough TPM driver | |
3 | * | |
4 | * Copyright (c) 2010 - 2013 IBM Corporation | |
5 | * Authors: | |
6 | * Stefan Berger <stefanb@us.ibm.com> | |
7 | * | |
8 | * Copyright (C) 2011 IAIK, Graz University of Technology | |
9 | * Author: Andreas Niederl | |
10 | * | |
11 | * This library is free software; you can redistribute it and/or | |
12 | * modify it under the terms of the GNU Lesser General Public | |
13 | * License as published by the Free Software Foundation; either | |
14 | * version 2 of the License, or (at your option) any later version. | |
15 | * | |
16 | * This library is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
19 | * Lesser General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU Lesser General Public | |
22 | * License along with this library; if not, see <http://www.gnu.org/licenses/> | |
23 | */ | |
24 | ||
92dcc234 SB |
25 | #include <dirent.h> |
26 | ||
4549a8b7 SB |
27 | #include "qemu-common.h" |
28 | #include "qapi/error.h" | |
29 | #include "qemu/sockets.h" | |
8f0605cc | 30 | #include "backends/tpm.h" |
4549a8b7 SB |
31 | #include "tpm_int.h" |
32 | #include "hw/hw.h" | |
33 | #include "hw/pc.h" | |
34 | #include "tpm_tis.h" | |
35 | #include "tpm_backend.h" | |
36 | ||
37 | /* #define DEBUG_TPM */ | |
38 | ||
39 | #ifdef DEBUG_TPM | |
40 | #define DPRINTF(fmt, ...) \ | |
41 | do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) | |
42 | #else | |
43 | #define DPRINTF(fmt, ...) \ | |
44 | do { } while (0) | |
45 | #endif | |
46 | ||
8f0605cc SB |
47 | #define TYPE_TPM_PASSTHROUGH "tpm-passthrough" |
48 | #define TPM_PASSTHROUGH(obj) \ | |
49 | OBJECT_CHECK(TPMPassthruState, (obj), TYPE_TPM_PASSTHROUGH) | |
4549a8b7 | 50 | |
8f0605cc | 51 | /* data structures */ |
4549a8b7 SB |
52 | typedef struct TPMPassthruThreadParams { |
53 | TPMState *tpm_state; | |
54 | ||
55 | TPMRecvDataCB *recv_data_callback; | |
56 | TPMBackend *tb; | |
57 | } TPMPassthruThreadParams; | |
58 | ||
59 | struct TPMPassthruState { | |
8f0605cc SB |
60 | TPMBackend parent; |
61 | ||
4549a8b7 SB |
62 | TPMBackendThread tbt; |
63 | ||
64 | TPMPassthruThreadParams tpm_thread_params; | |
65 | ||
66 | char *tpm_dev; | |
67 | int tpm_fd; | |
92dcc234 SB |
68 | bool tpm_executing; |
69 | bool tpm_op_canceled; | |
70 | int cancel_fd; | |
4549a8b7 SB |
71 | bool had_startup_error; |
72 | }; | |
73 | ||
8f0605cc SB |
74 | typedef struct TPMPassthruState TPMPassthruState; |
75 | ||
4549a8b7 SB |
76 | #define TPM_PASSTHROUGH_DEFAULT_DEVICE "/dev/tpm0" |
77 | ||
92dcc234 SB |
78 | /* functions */ |
79 | ||
80 | static void tpm_passthrough_cancel_cmd(TPMBackend *tb); | |
81 | ||
4549a8b7 SB |
82 | static int tpm_passthrough_unix_write(int fd, const uint8_t *buf, uint32_t len) |
83 | { | |
84 | return send_all(fd, buf, len); | |
85 | } | |
86 | ||
87 | static int tpm_passthrough_unix_read(int fd, uint8_t *buf, uint32_t len) | |
88 | { | |
89 | return recv_all(fd, buf, len, true); | |
90 | } | |
91 | ||
92 | static uint32_t tpm_passthrough_get_size_from_buffer(const uint8_t *buf) | |
93 | { | |
94 | struct tpm_resp_hdr *resp = (struct tpm_resp_hdr *)buf; | |
95 | ||
96 | return be32_to_cpu(resp->len); | |
97 | } | |
98 | ||
92dcc234 | 99 | static int tpm_passthrough_unix_tx_bufs(TPMPassthruState *tpm_pt, |
4549a8b7 SB |
100 | const uint8_t *in, uint32_t in_len, |
101 | uint8_t *out, uint32_t out_len) | |
102 | { | |
103 | int ret; | |
104 | ||
92dcc234 SB |
105 | tpm_pt->tpm_op_canceled = false; |
106 | tpm_pt->tpm_executing = true; | |
107 | ||
108 | ret = tpm_passthrough_unix_write(tpm_pt->tpm_fd, in, in_len); | |
4549a8b7 | 109 | if (ret != in_len) { |
92dcc234 SB |
110 | if (!tpm_pt->tpm_op_canceled || |
111 | (tpm_pt->tpm_op_canceled && errno != ECANCELED)) { | |
112 | error_report("tpm_passthrough: error while transmitting data " | |
113 | "to TPM: %s (%i)\n", | |
114 | strerror(errno), errno); | |
115 | } | |
4549a8b7 SB |
116 | goto err_exit; |
117 | } | |
118 | ||
92dcc234 SB |
119 | tpm_pt->tpm_executing = false; |
120 | ||
121 | ret = tpm_passthrough_unix_read(tpm_pt->tpm_fd, out, out_len); | |
4549a8b7 | 122 | if (ret < 0) { |
92dcc234 SB |
123 | if (!tpm_pt->tpm_op_canceled || |
124 | (tpm_pt->tpm_op_canceled && errno != ECANCELED)) { | |
125 | error_report("tpm_passthrough: error while reading data from " | |
126 | "TPM: %s (%i)\n", | |
127 | strerror(errno), errno); | |
128 | } | |
4549a8b7 SB |
129 | } else if (ret < sizeof(struct tpm_resp_hdr) || |
130 | tpm_passthrough_get_size_from_buffer(out) != ret) { | |
131 | ret = -1; | |
132 | error_report("tpm_passthrough: received invalid response " | |
133 | "packet from TPM\n"); | |
134 | } | |
135 | ||
136 | err_exit: | |
137 | if (ret < 0) { | |
138 | tpm_write_fatal_error_response(out, out_len); | |
139 | } | |
140 | ||
92dcc234 SB |
141 | tpm_pt->tpm_executing = false; |
142 | ||
4549a8b7 SB |
143 | return ret; |
144 | } | |
145 | ||
92dcc234 | 146 | static int tpm_passthrough_unix_transfer(TPMPassthruState *tpm_pt, |
4549a8b7 SB |
147 | const TPMLocality *locty_data) |
148 | { | |
92dcc234 | 149 | return tpm_passthrough_unix_tx_bufs(tpm_pt, |
4549a8b7 SB |
150 | locty_data->w_buffer.buffer, |
151 | locty_data->w_offset, | |
152 | locty_data->r_buffer.buffer, | |
153 | locty_data->r_buffer.size); | |
154 | } | |
155 | ||
156 | static void tpm_passthrough_worker_thread(gpointer data, | |
157 | gpointer user_data) | |
158 | { | |
159 | TPMPassthruThreadParams *thr_parms = user_data; | |
8f0605cc | 160 | TPMPassthruState *tpm_pt = TPM_PASSTHROUGH(thr_parms->tb); |
4549a8b7 SB |
161 | TPMBackendCmd cmd = (TPMBackendCmd)data; |
162 | ||
163 | DPRINTF("tpm_passthrough: processing command type %d\n", cmd); | |
164 | ||
165 | switch (cmd) { | |
166 | case TPM_BACKEND_CMD_PROCESS_CMD: | |
92dcc234 | 167 | tpm_passthrough_unix_transfer(tpm_pt, |
4549a8b7 SB |
168 | thr_parms->tpm_state->locty_data); |
169 | ||
170 | thr_parms->recv_data_callback(thr_parms->tpm_state, | |
171 | thr_parms->tpm_state->locty_number); | |
172 | break; | |
173 | case TPM_BACKEND_CMD_INIT: | |
174 | case TPM_BACKEND_CMD_END: | |
175 | case TPM_BACKEND_CMD_TPM_RESET: | |
176 | /* nothing to do */ | |
177 | break; | |
178 | } | |
179 | } | |
180 | ||
181 | /* | |
182 | * Start the TPM (thread). If it had been started before, then terminate | |
183 | * and start it again. | |
184 | */ | |
185 | static int tpm_passthrough_startup_tpm(TPMBackend *tb) | |
186 | { | |
8f0605cc | 187 | TPMPassthruState *tpm_pt = TPM_PASSTHROUGH(tb); |
4549a8b7 SB |
188 | |
189 | /* terminate a running TPM */ | |
190 | tpm_backend_thread_end(&tpm_pt->tbt); | |
191 | ||
192 | tpm_backend_thread_create(&tpm_pt->tbt, | |
193 | tpm_passthrough_worker_thread, | |
8f0605cc | 194 | &tpm_pt->tpm_thread_params); |
4549a8b7 SB |
195 | |
196 | return 0; | |
197 | } | |
198 | ||
199 | static void tpm_passthrough_reset(TPMBackend *tb) | |
200 | { | |
8f0605cc | 201 | TPMPassthruState *tpm_pt = TPM_PASSTHROUGH(tb); |
4549a8b7 SB |
202 | |
203 | DPRINTF("tpm_passthrough: CALL TO TPM_RESET!\n"); | |
204 | ||
92dcc234 SB |
205 | tpm_passthrough_cancel_cmd(tb); |
206 | ||
4549a8b7 SB |
207 | tpm_backend_thread_end(&tpm_pt->tbt); |
208 | ||
209 | tpm_pt->had_startup_error = false; | |
210 | } | |
211 | ||
212 | static int tpm_passthrough_init(TPMBackend *tb, TPMState *s, | |
213 | TPMRecvDataCB *recv_data_cb) | |
214 | { | |
8f0605cc | 215 | TPMPassthruState *tpm_pt = TPM_PASSTHROUGH(tb); |
4549a8b7 SB |
216 | |
217 | tpm_pt->tpm_thread_params.tpm_state = s; | |
218 | tpm_pt->tpm_thread_params.recv_data_callback = recv_data_cb; | |
219 | tpm_pt->tpm_thread_params.tb = tb; | |
220 | ||
221 | return 0; | |
222 | } | |
223 | ||
224 | static bool tpm_passthrough_get_tpm_established_flag(TPMBackend *tb) | |
225 | { | |
226 | return false; | |
227 | } | |
228 | ||
229 | static bool tpm_passthrough_get_startup_error(TPMBackend *tb) | |
230 | { | |
8f0605cc | 231 | TPMPassthruState *tpm_pt = TPM_PASSTHROUGH(tb); |
4549a8b7 SB |
232 | |
233 | return tpm_pt->had_startup_error; | |
234 | } | |
235 | ||
236 | static size_t tpm_passthrough_realloc_buffer(TPMSizedBuffer *sb) | |
237 | { | |
238 | size_t wanted_size = 4096; /* Linux tpm.c buffer size */ | |
239 | ||
240 | if (sb->size != wanted_size) { | |
241 | sb->buffer = g_realloc(sb->buffer, wanted_size); | |
242 | sb->size = wanted_size; | |
243 | } | |
244 | return sb->size; | |
245 | } | |
246 | ||
247 | static void tpm_passthrough_deliver_request(TPMBackend *tb) | |
248 | { | |
8f0605cc | 249 | TPMPassthruState *tpm_pt = TPM_PASSTHROUGH(tb); |
4549a8b7 SB |
250 | |
251 | tpm_backend_thread_deliver_request(&tpm_pt->tbt); | |
252 | } | |
253 | ||
254 | static void tpm_passthrough_cancel_cmd(TPMBackend *tb) | |
255 | { | |
8f0605cc | 256 | TPMPassthruState *tpm_pt = TPM_PASSTHROUGH(tb); |
92dcc234 SB |
257 | int n; |
258 | ||
259 | /* | |
260 | * As of Linux 3.7 the tpm_tis driver does not properly cancel | |
261 | * commands on all TPM manufacturers' TPMs. | |
262 | * Only cancel if we're busy so we don't cancel someone else's | |
263 | * command, e.g., a command executed on the host. | |
264 | */ | |
265 | if (tpm_pt->tpm_executing) { | |
266 | if (tpm_pt->cancel_fd >= 0) { | |
267 | n = write(tpm_pt->cancel_fd, "-", 1); | |
268 | if (n != 1) { | |
269 | error_report("Canceling TPM command failed: %s\n", | |
270 | strerror(errno)); | |
271 | } else { | |
272 | tpm_pt->tpm_op_canceled = true; | |
273 | } | |
274 | } else { | |
275 | error_report("Cannot cancel TPM command due to missing " | |
276 | "TPM sysfs cancel entry"); | |
277 | } | |
278 | } | |
4549a8b7 SB |
279 | } |
280 | ||
281 | static const char *tpm_passthrough_create_desc(void) | |
282 | { | |
283 | return "Passthrough TPM backend driver"; | |
284 | } | |
285 | ||
286 | /* | |
287 | * A basic test of a TPM device. We expect a well formatted response header | |
288 | * (error response is fine) within one second. | |
289 | */ | |
290 | static int tpm_passthrough_test_tpmdev(int fd) | |
291 | { | |
292 | struct tpm_req_hdr req = { | |
293 | .tag = cpu_to_be16(TPM_TAG_RQU_COMMAND), | |
294 | .len = cpu_to_be32(sizeof(req)), | |
295 | .ordinal = cpu_to_be32(TPM_ORD_GetTicks), | |
296 | }; | |
297 | struct tpm_resp_hdr *resp; | |
298 | fd_set readfds; | |
299 | int n; | |
300 | struct timeval tv = { | |
301 | .tv_sec = 1, | |
302 | .tv_usec = 0, | |
303 | }; | |
304 | unsigned char buf[1024]; | |
305 | ||
306 | n = write(fd, &req, sizeof(req)); | |
307 | if (n < 0) { | |
308 | return errno; | |
309 | } | |
310 | if (n != sizeof(req)) { | |
311 | return EFAULT; | |
312 | } | |
313 | ||
314 | FD_ZERO(&readfds); | |
315 | FD_SET(fd, &readfds); | |
316 | ||
317 | /* wait for a second */ | |
318 | n = select(fd + 1, &readfds, NULL, NULL, &tv); | |
319 | if (n != 1) { | |
320 | return errno; | |
321 | } | |
322 | ||
323 | n = read(fd, &buf, sizeof(buf)); | |
324 | if (n < sizeof(struct tpm_resp_hdr)) { | |
325 | return EFAULT; | |
326 | } | |
327 | ||
328 | resp = (struct tpm_resp_hdr *)buf; | |
329 | /* check the header */ | |
330 | if (be16_to_cpu(resp->tag) != TPM_TAG_RSP_COMMAND || | |
331 | be32_to_cpu(resp->len) != n) { | |
332 | return EBADMSG; | |
333 | } | |
334 | ||
335 | return 0; | |
336 | } | |
337 | ||
92dcc234 SB |
338 | /* |
339 | * Check whether the given base path, e.g., /sys/class/misc/tpm0/device, | |
340 | * is the sysfs directory of a TPM. A TPM sysfs directory should be uniquely | |
341 | * recognizable by the file entries 'pcrs' and 'cancel'. | |
342 | * Upon success 'true' is returned and the basebath buffer has '/cancel' | |
343 | * appended. | |
344 | */ | |
345 | static bool tpm_passthrough_check_sysfs_cancel(char *basepath, size_t bufsz) | |
346 | { | |
347 | char path[PATH_MAX]; | |
348 | struct stat statbuf; | |
349 | ||
350 | snprintf(path, sizeof(path), "%s/pcrs", basepath); | |
351 | if (stat(path, &statbuf) == -1 || !S_ISREG(statbuf.st_mode)) { | |
352 | return false; | |
353 | } | |
354 | ||
355 | snprintf(path, sizeof(path), "%s/cancel", basepath); | |
356 | if (stat(path, &statbuf) == -1 || !S_ISREG(statbuf.st_mode)) { | |
357 | return false; | |
358 | } | |
359 | ||
360 | strncpy(basepath, path, bufsz); | |
361 | ||
362 | return true; | |
363 | } | |
364 | ||
365 | /* | |
366 | * Unless path or file descriptor set has been provided by user, | |
367 | * determine the sysfs cancel file following kernel documentation | |
368 | * in Documentation/ABI/stable/sysfs-class-tpm. | |
369 | */ | |
370 | static int tpm_passthrough_open_sysfs_cancel(TPMBackend *tb) | |
371 | { | |
372 | int fd = -1; | |
373 | unsigned int idx; | |
374 | DIR *pnp_dir; | |
375 | char path[PATH_MAX]; | |
376 | struct dirent entry, *result; | |
377 | int len; | |
378 | ||
379 | if (tb->cancel_path) { | |
380 | fd = qemu_open(tb->cancel_path, O_WRONLY); | |
381 | if (fd < 0) { | |
382 | error_report("Could not open TPM cancel path : %s", | |
383 | strerror(errno)); | |
384 | } | |
385 | return fd; | |
386 | } | |
387 | ||
388 | snprintf(path, sizeof(path), "/sys/class/misc"); | |
389 | pnp_dir = opendir(path); | |
390 | if (pnp_dir != NULL) { | |
391 | while (readdir_r(pnp_dir, &entry, &result) == 0 && | |
392 | result != NULL) { | |
393 | /* | |
394 | * only allow /sys/class/misc/tpm%u type of paths | |
395 | */ | |
396 | if (sscanf(entry.d_name, "tpm%u%n", &idx, &len) < 1 || | |
397 | len <= strlen("tpm") || | |
398 | len != strlen(entry.d_name)) { | |
399 | continue; | |
400 | } | |
401 | ||
402 | snprintf(path, sizeof(path), "/sys/class/misc/%s/device", | |
403 | entry.d_name); | |
404 | if (!tpm_passthrough_check_sysfs_cancel(path, sizeof(path))) { | |
405 | continue; | |
406 | } | |
407 | ||
408 | fd = qemu_open(path, O_WRONLY); | |
409 | break; | |
410 | } | |
411 | closedir(pnp_dir); | |
412 | } | |
413 | ||
414 | if (fd >= 0) { | |
415 | tb->cancel_path = g_strdup(path); | |
416 | } | |
417 | ||
418 | return fd; | |
419 | } | |
420 | ||
4549a8b7 SB |
421 | static int tpm_passthrough_handle_device_opts(QemuOpts *opts, TPMBackend *tb) |
422 | { | |
8f0605cc | 423 | TPMPassthruState *tpm_pt = TPM_PASSTHROUGH(tb); |
4549a8b7 SB |
424 | const char *value; |
425 | ||
92dcc234 SB |
426 | value = qemu_opt_get(opts, "cancel-path"); |
427 | if (value) { | |
428 | tb->cancel_path = g_strdup(value); | |
429 | } | |
430 | ||
4549a8b7 SB |
431 | value = qemu_opt_get(opts, "path"); |
432 | if (!value) { | |
433 | value = TPM_PASSTHROUGH_DEFAULT_DEVICE; | |
434 | } | |
435 | ||
8f0605cc | 436 | tpm_pt->tpm_dev = g_strdup(value); |
4549a8b7 | 437 | |
8f0605cc | 438 | tb->path = g_strdup(tpm_pt->tpm_dev); |
4549a8b7 | 439 | |
8f0605cc SB |
440 | tpm_pt->tpm_fd = qemu_open(tpm_pt->tpm_dev, O_RDWR); |
441 | if (tpm_pt->tpm_fd < 0) { | |
4549a8b7 | 442 | error_report("Cannot access TPM device using '%s': %s\n", |
8f0605cc | 443 | tpm_pt->tpm_dev, strerror(errno)); |
4549a8b7 SB |
444 | goto err_free_parameters; |
445 | } | |
446 | ||
8f0605cc | 447 | if (tpm_passthrough_test_tpmdev(tpm_pt->tpm_fd)) { |
4549a8b7 | 448 | error_report("'%s' is not a TPM device.\n", |
8f0605cc | 449 | tpm_pt->tpm_dev); |
4549a8b7 SB |
450 | goto err_close_tpmdev; |
451 | } | |
452 | ||
453 | return 0; | |
454 | ||
455 | err_close_tpmdev: | |
8f0605cc SB |
456 | qemu_close(tpm_pt->tpm_fd); |
457 | tpm_pt->tpm_fd = -1; | |
4549a8b7 SB |
458 | |
459 | err_free_parameters: | |
460 | g_free(tb->path); | |
461 | tb->path = NULL; | |
462 | ||
8f0605cc SB |
463 | g_free(tpm_pt->tpm_dev); |
464 | tpm_pt->tpm_dev = NULL; | |
4549a8b7 SB |
465 | |
466 | return 1; | |
467 | } | |
468 | ||
469 | static TPMBackend *tpm_passthrough_create(QemuOpts *opts, const char *id) | |
470 | { | |
8f0605cc SB |
471 | Object *obj = object_new(TYPE_TPM_PASSTHROUGH); |
472 | TPMBackend *tb = TPM_BACKEND(obj); | |
473 | TPMPassthruState *tpm_pt = TPM_PASSTHROUGH(tb); | |
4549a8b7 | 474 | |
4549a8b7 SB |
475 | tb->id = g_strdup(id); |
476 | /* let frontend set the fe_model to proper value */ | |
477 | tb->fe_model = -1; | |
478 | ||
479 | tb->ops = &tpm_passthrough_driver; | |
480 | ||
481 | if (tpm_passthrough_handle_device_opts(opts, tb)) { | |
482 | goto err_exit; | |
483 | } | |
484 | ||
8f0605cc SB |
485 | tpm_pt->cancel_fd = tpm_passthrough_open_sysfs_cancel(tb); |
486 | if (tpm_pt->cancel_fd < 0) { | |
92dcc234 SB |
487 | goto err_exit; |
488 | } | |
489 | ||
4549a8b7 SB |
490 | return tb; |
491 | ||
492 | err_exit: | |
493 | g_free(tb->id); | |
4549a8b7 SB |
494 | |
495 | return NULL; | |
496 | } | |
497 | ||
498 | static void tpm_passthrough_destroy(TPMBackend *tb) | |
499 | { | |
8f0605cc | 500 | TPMPassthruState *tpm_pt = TPM_PASSTHROUGH(tb); |
4549a8b7 | 501 | |
92dcc234 SB |
502 | tpm_passthrough_cancel_cmd(tb); |
503 | ||
4549a8b7 SB |
504 | tpm_backend_thread_end(&tpm_pt->tbt); |
505 | ||
506 | qemu_close(tpm_pt->tpm_fd); | |
8f0605cc | 507 | qemu_close(tpm_pt->cancel_fd); |
4549a8b7 SB |
508 | |
509 | g_free(tb->id); | |
510 | g_free(tb->path); | |
92dcc234 | 511 | g_free(tb->cancel_path); |
8f0605cc | 512 | g_free(tpm_pt->tpm_dev); |
4549a8b7 SB |
513 | } |
514 | ||
515 | const TPMDriverOps tpm_passthrough_driver = { | |
516 | .type = TPM_TYPE_PASSTHROUGH, | |
517 | .desc = tpm_passthrough_create_desc, | |
518 | .create = tpm_passthrough_create, | |
519 | .destroy = tpm_passthrough_destroy, | |
520 | .init = tpm_passthrough_init, | |
521 | .startup_tpm = tpm_passthrough_startup_tpm, | |
522 | .realloc_buffer = tpm_passthrough_realloc_buffer, | |
523 | .reset = tpm_passthrough_reset, | |
524 | .had_startup_error = tpm_passthrough_get_startup_error, | |
525 | .deliver_request = tpm_passthrough_deliver_request, | |
526 | .cancel_cmd = tpm_passthrough_cancel_cmd, | |
527 | .get_tpm_established_flag = tpm_passthrough_get_tpm_established_flag, | |
528 | }; | |
529 | ||
8f0605cc SB |
530 | static void tpm_passthrough_inst_init(Object *obj) |
531 | { | |
532 | } | |
533 | ||
534 | static void tpm_passthrough_inst_finalize(Object *obj) | |
535 | { | |
536 | } | |
537 | ||
538 | static void tpm_passthrough_class_init(ObjectClass *klass, void *data) | |
539 | { | |
540 | TPMBackendClass *tbc = TPM_BACKEND_CLASS(klass); | |
541 | ||
542 | tbc->ops = &tpm_passthrough_driver; | |
543 | } | |
544 | ||
545 | static const TypeInfo tpm_passthrough_info = { | |
546 | .name = TYPE_TPM_PASSTHROUGH, | |
547 | .parent = TYPE_TPM_BACKEND, | |
548 | .instance_size = sizeof(TPMPassthruState), | |
549 | .class_init = tpm_passthrough_class_init, | |
550 | .instance_init = tpm_passthrough_inst_init, | |
551 | .instance_finalize = tpm_passthrough_inst_finalize, | |
552 | }; | |
553 | ||
4549a8b7 SB |
554 | static void tpm_passthrough_register(void) |
555 | { | |
8f0605cc | 556 | type_register_static(&tpm_passthrough_info); |
4549a8b7 SB |
557 | tpm_register_driver(&tpm_passthrough_driver); |
558 | } | |
559 | ||
560 | type_init(tpm_passthrough_register) |