1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29#include "qemu/osdep.h"
30#include "qemu/error-report.h"
31#include "qemu/sockets.h"
32#include "io/channel-socket.h"
33#include "sysemu/tpm_backend.h"
34#include "tpm_int.h"
35#include "hw/hw.h"
36#include "tpm_util.h"
37#include "tpm_ioctl.h"
38#include "migration/blocker.h"
39#include "qapi/error.h"
40#include "qapi/clone-visitor.h"
41#include "qapi/qapi-visit-tpm.h"
42#include "chardev/char-fe.h"
43#include "trace.h"
44
45#define TYPE_TPM_EMULATOR "tpm-emulator"
46#define TPM_EMULATOR(obj) \
47 OBJECT_CHECK(TPMEmulator, (obj), TYPE_TPM_EMULATOR)
48
49#define TPM_EMULATOR_IMPLEMENTS_ALL_CAPS(S, cap) (((S)->caps & (cap)) == (cap))
50
51
52
53
54typedef struct TPMBlobBuffers {
55 uint32_t permanent_flags;
56 TPMSizedBuffer permanent;
57
58 uint32_t volatil_flags;
59 TPMSizedBuffer volatil;
60
61 uint32_t savestate_flags;
62 TPMSizedBuffer savestate;
63} TPMBlobBuffers;
64
65typedef struct TPMEmulator {
66 TPMBackend parent;
67
68 TPMEmulatorOptions *options;
69 CharBackend ctrl_chr;
70 QIOChannel *data_ioc;
71 TPMVersion tpm_version;
72 ptm_cap caps;
73 uint8_t cur_locty_number;
74 Error *migration_blocker;
75
76 QemuMutex mutex;
77
78 unsigned int established_flag:1;
79 unsigned int established_flag_cached:1;
80
81 TPMBlobBuffers state_blobs;
82} TPMEmulator;
83
84
85static int tpm_emulator_ctrlcmd(TPMEmulator *tpm, unsigned long cmd, void *msg,
86 size_t msg_len_in, size_t msg_len_out)
87{
88 CharBackend *dev = &tpm->ctrl_chr;
89 uint32_t cmd_no = cpu_to_be32(cmd);
90 ssize_t n = sizeof(uint32_t) + msg_len_in;
91 uint8_t *buf = NULL;
92 int ret = -1;
93
94 qemu_mutex_lock(&tpm->mutex);
95
96 buf = g_alloca(n);
97 memcpy(buf, &cmd_no, sizeof(cmd_no));
98 memcpy(buf + sizeof(cmd_no), msg, msg_len_in);
99
100 n = qemu_chr_fe_write_all(dev, buf, n);
101 if (n <= 0) {
102 goto end;
103 }
104
105 if (msg_len_out != 0) {
106 n = qemu_chr_fe_read_all(dev, msg, msg_len_out);
107 if (n <= 0) {
108 goto end;
109 }
110 }
111
112 ret = 0;
113
114end:
115 qemu_mutex_unlock(&tpm->mutex);
116 return ret;
117}
118
119static int tpm_emulator_unix_tx_bufs(TPMEmulator *tpm_emu,
120 const uint8_t *in, uint32_t in_len,
121 uint8_t *out, uint32_t out_len,
122 bool *selftest_done,
123 Error **err)
124{
125 ssize_t ret;
126 bool is_selftest = false;
127
128 if (selftest_done) {
129 *selftest_done = false;
130 is_selftest = tpm_util_is_selftest(in, in_len);
131 }
132
133 ret = qio_channel_write_all(tpm_emu->data_ioc, (char *)in, in_len, err);
134 if (ret != 0) {
135 return -1;
136 }
137
138 ret = qio_channel_read_all(tpm_emu->data_ioc, (char *)out,
139 sizeof(struct tpm_resp_hdr), err);
140 if (ret != 0) {
141 return -1;
142 }
143
144 ret = qio_channel_read_all(tpm_emu->data_ioc,
145 (char *)out + sizeof(struct tpm_resp_hdr),
146 tpm_cmd_get_size(out) - sizeof(struct tpm_resp_hdr), err);
147 if (ret != 0) {
148 return -1;
149 }
150
151 if (is_selftest) {
152 *selftest_done = tpm_cmd_get_errcode(out) == 0;
153 }
154
155 return 0;
156}
157
158static int tpm_emulator_set_locality(TPMEmulator *tpm_emu, uint8_t locty_number,
159 Error **errp)
160{
161 ptm_loc loc;
162
163 if (tpm_emu->cur_locty_number == locty_number) {
164 return 0;
165 }
166
167 trace_tpm_emulator_set_locality(locty_number);
168
169 loc.u.req.loc = locty_number;
170 if (tpm_emulator_ctrlcmd(tpm_emu, CMD_SET_LOCALITY, &loc,
171 sizeof(loc), sizeof(loc)) < 0) {
172 error_setg(errp, "tpm-emulator: could not set locality : %s",
173 strerror(errno));
174 return -1;
175 }
176
177 loc.u.resp.tpm_result = be32_to_cpu(loc.u.resp.tpm_result);
178 if (loc.u.resp.tpm_result != 0) {
179 error_setg(errp, "tpm-emulator: TPM result for set locality : 0x%x",
180 loc.u.resp.tpm_result);
181 return -1;
182 }
183
184 tpm_emu->cur_locty_number = locty_number;
185
186 return 0;
187}
188
189static void tpm_emulator_handle_request(TPMBackend *tb, TPMBackendCmd *cmd,
190 Error **errp)
191{
192 TPMEmulator *tpm_emu = TPM_EMULATOR(tb);
193
194 trace_tpm_emulator_handle_request();
195
196 if (tpm_emulator_set_locality(tpm_emu, cmd->locty, errp) < 0 ||
197 tpm_emulator_unix_tx_bufs(tpm_emu, cmd->in, cmd->in_len,
198 cmd->out, cmd->out_len,
199 &cmd->selftest_done, errp) < 0) {
200 tpm_util_write_fatal_error_response(cmd->out, cmd->out_len);
201 }
202}
203
204static int tpm_emulator_probe_caps(TPMEmulator *tpm_emu)
205{
206 if (tpm_emulator_ctrlcmd(tpm_emu, CMD_GET_CAPABILITY,
207 &tpm_emu->caps, 0, sizeof(tpm_emu->caps)) < 0) {
208 error_report("tpm-emulator: probing failed : %s", strerror(errno));
209 return -1;
210 }
211
212 tpm_emu->caps = be64_to_cpu(tpm_emu->caps);
213
214 trace_tpm_emulator_probe_caps(tpm_emu->caps);
215
216 return 0;
217}
218
219static int tpm_emulator_check_caps(TPMEmulator *tpm_emu)
220{
221 ptm_cap caps = 0;
222 const char *tpm = NULL;
223
224
225 switch (tpm_emu->tpm_version) {
226 case TPM_VERSION_1_2:
227 caps = PTM_CAP_INIT | PTM_CAP_SHUTDOWN | PTM_CAP_GET_TPMESTABLISHED |
228 PTM_CAP_SET_LOCALITY | PTM_CAP_SET_DATAFD | PTM_CAP_STOP |
229 PTM_CAP_SET_BUFFERSIZE;
230 tpm = "1.2";
231 break;
232 case TPM_VERSION_2_0:
233 caps = PTM_CAP_INIT | PTM_CAP_SHUTDOWN | PTM_CAP_GET_TPMESTABLISHED |
234 PTM_CAP_SET_LOCALITY | PTM_CAP_RESET_TPMESTABLISHED |
235 PTM_CAP_SET_DATAFD | PTM_CAP_STOP | PTM_CAP_SET_BUFFERSIZE;
236 tpm = "2";
237 break;
238 case TPM_VERSION_UNSPEC:
239 error_report("tpm-emulator: TPM version has not been set");
240 return -1;
241 }
242
243 if (!TPM_EMULATOR_IMPLEMENTS_ALL_CAPS(tpm_emu, caps)) {
244 error_report("tpm-emulator: TPM does not implement minimum set of "
245 "required capabilities for TPM %s (0x%x)", tpm, (int)caps);
246 return -1;
247 }
248
249 return 0;
250}
251
252static int tpm_emulator_stop_tpm(TPMBackend *tb)
253{
254 TPMEmulator *tpm_emu = TPM_EMULATOR(tb);
255 ptm_res res;
256
257 if (tpm_emulator_ctrlcmd(tpm_emu, CMD_STOP, &res, 0, sizeof(res)) < 0) {
258 error_report("tpm-emulator: Could not stop TPM: %s",
259 strerror(errno));
260 return -1;
261 }
262
263 res = be32_to_cpu(res);
264 if (res) {
265 error_report("tpm-emulator: TPM result for CMD_STOP: 0x%x", res);
266 return -1;
267 }
268
269 return 0;
270}
271
272static int tpm_emulator_set_buffer_size(TPMBackend *tb,
273 size_t wanted_size,
274 size_t *actual_size)
275{
276 TPMEmulator *tpm_emu = TPM_EMULATOR(tb);
277 ptm_setbuffersize psbs;
278
279 if (tpm_emulator_stop_tpm(tb) < 0) {
280 return -1;
281 }
282
283 psbs.u.req.buffersize = cpu_to_be32(wanted_size);
284
285 if (tpm_emulator_ctrlcmd(tpm_emu, CMD_SET_BUFFERSIZE, &psbs,
286 sizeof(psbs.u.req), sizeof(psbs.u.resp)) < 0) {
287 error_report("tpm-emulator: Could not set buffer size: %s",
288 strerror(errno));
289 return -1;
290 }
291
292 psbs.u.resp.tpm_result = be32_to_cpu(psbs.u.resp.tpm_result);
293 if (psbs.u.resp.tpm_result != 0) {
294 error_report("tpm-emulator: TPM result for set buffer size : 0x%x",
295 psbs.u.resp.tpm_result);
296 return -1;
297 }
298
299 if (actual_size) {
300 *actual_size = be32_to_cpu(psbs.u.resp.buffersize);
301 }
302
303 trace_tpm_emulator_set_buffer_size(
304 be32_to_cpu(psbs.u.resp.buffersize),
305 be32_to_cpu(psbs.u.resp.minsize),
306 be32_to_cpu(psbs.u.resp.maxsize));
307
308 return 0;
309}
310
311static int tpm_emulator_startup_tpm_resume(TPMBackend *tb, size_t buffersize,
312 bool is_resume)
313{
314 TPMEmulator *tpm_emu = TPM_EMULATOR(tb);
315 ptm_init init = {
316 .u.req.init_flags = 0,
317 };
318 ptm_res res;
319
320 trace_tpm_emulator_startup_tpm_resume(is_resume, buffersize);
321
322 if (buffersize != 0 &&
323 tpm_emulator_set_buffer_size(tb, buffersize, NULL) < 0) {
324 goto err_exit;
325 }
326
327 if (is_resume) {
328 init.u.req.init_flags |= cpu_to_be32(PTM_INIT_FLAG_DELETE_VOLATILE);
329 }
330
331 if (tpm_emulator_ctrlcmd(tpm_emu, CMD_INIT, &init, sizeof(init),
332 sizeof(init)) < 0) {
333 error_report("tpm-emulator: could not send INIT: %s",
334 strerror(errno));
335 goto err_exit;
336 }
337
338 res = be32_to_cpu(init.u.resp.tpm_result);
339 if (res) {
340 error_report("tpm-emulator: TPM result for CMD_INIT: 0x%x", res);
341 goto err_exit;
342 }
343 return 0;
344
345err_exit:
346 return -1;
347}
348
349static int tpm_emulator_startup_tpm(TPMBackend *tb, size_t buffersize)
350{
351 return tpm_emulator_startup_tpm_resume(tb, buffersize, false);
352}
353
354static bool tpm_emulator_get_tpm_established_flag(TPMBackend *tb)
355{
356 TPMEmulator *tpm_emu = TPM_EMULATOR(tb);
357 ptm_est est;
358
359 if (tpm_emu->established_flag_cached) {
360 return tpm_emu->established_flag;
361 }
362
363 if (tpm_emulator_ctrlcmd(tpm_emu, CMD_GET_TPMESTABLISHED, &est,
364 0, sizeof(est)) < 0) {
365 error_report("tpm-emulator: Could not get the TPM established flag: %s",
366 strerror(errno));
367 return false;
368 }
369 trace_tpm_emulator_get_tpm_established_flag(est.u.resp.bit);
370
371 tpm_emu->established_flag_cached = 1;
372 tpm_emu->established_flag = (est.u.resp.bit != 0);
373
374 return tpm_emu->established_flag;
375}
376
377static int tpm_emulator_reset_tpm_established_flag(TPMBackend *tb,
378 uint8_t locty)
379{
380 TPMEmulator *tpm_emu = TPM_EMULATOR(tb);
381 ptm_reset_est reset_est;
382 ptm_res res;
383
384
385 if (tpm_emu->tpm_version != TPM_VERSION_2_0) {
386 return 0;
387 }
388
389 reset_est.u.req.loc = tpm_emu->cur_locty_number;
390 if (tpm_emulator_ctrlcmd(tpm_emu, CMD_RESET_TPMESTABLISHED,
391 &reset_est, sizeof(reset_est),
392 sizeof(reset_est)) < 0) {
393 error_report("tpm-emulator: Could not reset the establishment bit: %s",
394 strerror(errno));
395 return -1;
396 }
397
398 res = be32_to_cpu(reset_est.u.resp.tpm_result);
399 if (res) {
400 error_report("tpm-emulator: TPM result for rest establixhed flag: 0x%x",
401 res);
402 return -1;
403 }
404
405 tpm_emu->established_flag_cached = 0;
406
407 return 0;
408}
409
410static void tpm_emulator_cancel_cmd(TPMBackend *tb)
411{
412 TPMEmulator *tpm_emu = TPM_EMULATOR(tb);
413 ptm_res res;
414
415 if (!TPM_EMULATOR_IMPLEMENTS_ALL_CAPS(tpm_emu, PTM_CAP_CANCEL_TPM_CMD)) {
416 trace_tpm_emulator_cancel_cmd_not_supt();
417 return;
418 }
419
420
421 if (tpm_emulator_ctrlcmd(tpm_emu, CMD_CANCEL_TPM_CMD, &res, 0,
422 sizeof(res)) < 0) {
423 error_report("tpm-emulator: Could not cancel command: %s",
424 strerror(errno));
425 } else if (res != 0) {
426 error_report("tpm-emulator: Failed to cancel TPM: 0x%x",
427 be32_to_cpu(res));
428 }
429}
430
431static TPMVersion tpm_emulator_get_tpm_version(TPMBackend *tb)
432{
433 TPMEmulator *tpm_emu = TPM_EMULATOR(tb);
434
435 return tpm_emu->tpm_version;
436}
437
438static size_t tpm_emulator_get_buffer_size(TPMBackend *tb)
439{
440 size_t actual_size;
441
442 if (tpm_emulator_set_buffer_size(tb, 0, &actual_size) < 0) {
443 return 4096;
444 }
445
446 return actual_size;
447}
448
449static int tpm_emulator_block_migration(TPMEmulator *tpm_emu)
450{
451 Error *err = NULL;
452 ptm_cap caps = PTM_CAP_GET_STATEBLOB | PTM_CAP_SET_STATEBLOB |
453 PTM_CAP_STOP;
454
455 if (!TPM_EMULATOR_IMPLEMENTS_ALL_CAPS(tpm_emu, caps)) {
456 error_setg(&tpm_emu->migration_blocker,
457 "Migration disabled: TPM emulator does not support "
458 "migration");
459 migrate_add_blocker(tpm_emu->migration_blocker, &err);
460 if (err) {
461 error_report_err(err);
462 error_free(tpm_emu->migration_blocker);
463 tpm_emu->migration_blocker = NULL;
464
465 return -1;
466 }
467 }
468
469 return 0;
470}
471
472static int tpm_emulator_prepare_data_fd(TPMEmulator *tpm_emu)
473{
474 ptm_res res;
475 Error *err = NULL;
476 int fds[2] = { -1, -1 };
477
478 if (socketpair(AF_UNIX, SOCK_STREAM, 0, fds) < 0) {
479 error_report("tpm-emulator: Failed to create socketpair");
480 return -1;
481 }
482
483 qemu_chr_fe_set_msgfds(&tpm_emu->ctrl_chr, fds + 1, 1);
484
485 if (tpm_emulator_ctrlcmd(tpm_emu, CMD_SET_DATAFD, &res, 0,
486 sizeof(res)) < 0 || res != 0) {
487 error_report("tpm-emulator: Failed to send CMD_SET_DATAFD: %s",
488 strerror(errno));
489 goto err_exit;
490 }
491
492 tpm_emu->data_ioc = QIO_CHANNEL(qio_channel_socket_new_fd(fds[0], &err));
493 if (err) {
494 error_prepend(&err, "tpm-emulator: Failed to create io channel: ");
495 error_report_err(err);
496 goto err_exit;
497 }
498
499 closesocket(fds[1]);
500
501 return 0;
502
503err_exit:
504 closesocket(fds[0]);
505 closesocket(fds[1]);
506 return -1;
507}
508
509static int tpm_emulator_handle_device_opts(TPMEmulator *tpm_emu, QemuOpts *opts)
510{
511 const char *value;
512
513 value = qemu_opt_get(opts, "chardev");
514 if (value) {
515 Error *err = NULL;
516 Chardev *dev = qemu_chr_find(value);
517
518 if (!dev) {
519 error_report("tpm-emulator: tpm chardev '%s' not found.", value);
520 goto err;
521 }
522
523 if (!qemu_chr_fe_init(&tpm_emu->ctrl_chr, dev, &err)) {
524 error_prepend(&err, "tpm-emulator: No valid chardev found at '%s':",
525 value);
526 error_report_err(err);
527 goto err;
528 }
529
530 tpm_emu->options->chardev = g_strdup(value);
531 }
532
533 if (tpm_emulator_prepare_data_fd(tpm_emu) < 0) {
534 goto err;
535 }
536
537
538
539
540 if (tpm_util_test_tpmdev(QIO_CHANNEL_SOCKET(tpm_emu->data_ioc)->fd,
541 &tpm_emu->tpm_version)) {
542 error_report("'%s' is not emulating TPM device. Error: %s",
543 tpm_emu->options->chardev, strerror(errno));
544 goto err;
545 }
546
547 switch (tpm_emu->tpm_version) {
548 case TPM_VERSION_1_2:
549 trace_tpm_emulator_handle_device_opts_tpm12();
550 break;
551 case TPM_VERSION_2_0:
552 trace_tpm_emulator_handle_device_opts_tpm2();
553 break;
554 default:
555 trace_tpm_emulator_handle_device_opts_unspec();
556 }
557
558 if (tpm_emulator_probe_caps(tpm_emu) ||
559 tpm_emulator_check_caps(tpm_emu)) {
560 goto err;
561 }
562
563 return tpm_emulator_block_migration(tpm_emu);
564
565err:
566 trace_tpm_emulator_handle_device_opts_startup_error();
567
568 return -1;
569}
570
571static TPMBackend *tpm_emulator_create(QemuOpts *opts)
572{
573 TPMBackend *tb = TPM_BACKEND(object_new(TYPE_TPM_EMULATOR));
574
575 if (tpm_emulator_handle_device_opts(TPM_EMULATOR(tb), opts)) {
576 object_unref(OBJECT(tb));
577 return NULL;
578 }
579
580 return tb;
581}
582
583static TpmTypeOptions *tpm_emulator_get_tpm_options(TPMBackend *tb)
584{
585 TPMEmulator *tpm_emu = TPM_EMULATOR(tb);
586 TpmTypeOptions *options = g_new0(TpmTypeOptions, 1);
587
588 options->type = TPM_TYPE_OPTIONS_KIND_EMULATOR;
589 options->u.emulator.data = QAPI_CLONE(TPMEmulatorOptions, tpm_emu->options);
590
591 return options;
592}
593
594static const QemuOptDesc tpm_emulator_cmdline_opts[] = {
595 TPM_STANDARD_CMDLINE_OPTS,
596 {
597 .name = "chardev",
598 .type = QEMU_OPT_STRING,
599 .help = "Character device to use for out-of-band control messages",
600 },
601 { },
602};
603
604
605
606
607
608
609
610
611
612static int tpm_emulator_get_state_blob(TPMEmulator *tpm_emu,
613 uint8_t type,
614 TPMSizedBuffer *tsb,
615 uint32_t *flags)
616{
617 ptm_getstate pgs;
618 ptm_res res;
619 ssize_t n;
620 uint32_t totlength, length;
621
622 tpm_sized_buffer_reset(tsb);
623
624 pgs.u.req.state_flags = cpu_to_be32(PTM_STATE_FLAG_DECRYPTED);
625 pgs.u.req.type = cpu_to_be32(type);
626 pgs.u.req.offset = 0;
627
628 if (tpm_emulator_ctrlcmd(tpm_emu, CMD_GET_STATEBLOB,
629 &pgs, sizeof(pgs.u.req),
630 offsetof(ptm_getstate, u.resp.data)) < 0) {
631 error_report("tpm-emulator: could not get state blob type %d : %s",
632 type, strerror(errno));
633 return -1;
634 }
635
636 res = be32_to_cpu(pgs.u.resp.tpm_result);
637 if (res != 0 && (res & 0x800) == 0) {
638 error_report("tpm-emulator: Getting the stateblob (type %d) failed "
639 "with a TPM error 0x%x", type, res);
640 return -1;
641 }
642
643 totlength = be32_to_cpu(pgs.u.resp.totlength);
644 length = be32_to_cpu(pgs.u.resp.length);
645 if (totlength != length) {
646 error_report("tpm-emulator: Expecting to read %u bytes "
647 "but would get %u", totlength, length);
648 return -1;
649 }
650
651 *flags = be32_to_cpu(pgs.u.resp.state_flags);
652
653 if (totlength > 0) {
654 tsb->buffer = g_try_malloc(totlength);
655 if (!tsb->buffer) {
656 error_report("tpm-emulator: Out of memory allocating %u bytes",
657 totlength);
658 return -1;
659 }
660
661 n = qemu_chr_fe_read_all(&tpm_emu->ctrl_chr, tsb->buffer, totlength);
662 if (n != totlength) {
663 error_report("tpm-emulator: Could not read stateblob (type %d); "
664 "expected %u bytes, got %zd",
665 type, totlength, n);
666 return -1;
667 }
668 }
669 tsb->size = totlength;
670
671 trace_tpm_emulator_get_state_blob(type, tsb->size, *flags);
672
673 return 0;
674}
675
676static int tpm_emulator_get_state_blobs(TPMEmulator *tpm_emu)
677{
678 TPMBlobBuffers *state_blobs = &tpm_emu->state_blobs;
679
680 if (tpm_emulator_get_state_blob(tpm_emu, PTM_BLOB_TYPE_PERMANENT,
681 &state_blobs->permanent,
682 &state_blobs->permanent_flags) < 0 ||
683 tpm_emulator_get_state_blob(tpm_emu, PTM_BLOB_TYPE_VOLATILE,
684 &state_blobs->volatil,
685 &state_blobs->volatil_flags) < 0 ||
686 tpm_emulator_get_state_blob(tpm_emu, PTM_BLOB_TYPE_SAVESTATE,
687 &state_blobs->savestate,
688 &state_blobs->savestate_flags) < 0) {
689 goto err_exit;
690 }
691
692 return 0;
693
694 err_exit:
695 tpm_sized_buffer_reset(&state_blobs->volatil);
696 tpm_sized_buffer_reset(&state_blobs->permanent);
697 tpm_sized_buffer_reset(&state_blobs->savestate);
698
699 return -1;
700}
701
702
703
704
705
706
707
708
709
710static int tpm_emulator_set_state_blob(TPMEmulator *tpm_emu,
711 uint32_t type,
712 TPMSizedBuffer *tsb,
713 uint32_t flags)
714{
715 ssize_t n;
716 ptm_setstate pss;
717 ptm_res tpm_result;
718
719 if (tsb->size == 0) {
720 return 0;
721 }
722
723 pss = (ptm_setstate) {
724 .u.req.state_flags = cpu_to_be32(flags),
725 .u.req.type = cpu_to_be32(type),
726 .u.req.length = cpu_to_be32(tsb->size),
727 };
728
729
730 if (tpm_emulator_ctrlcmd(tpm_emu, CMD_SET_STATEBLOB, &pss,
731 offsetof(ptm_setstate, u.req.data), 0) < 0) {
732 error_report("tpm-emulator: could not set state blob type %d : %s",
733 type, strerror(errno));
734 return -1;
735 }
736
737
738 n = qemu_chr_fe_write_all(&tpm_emu->ctrl_chr, tsb->buffer, tsb->size);
739 if (n != tsb->size) {
740 error_report("tpm-emulator: Writing the stateblob (type %d) "
741 "failed; could not write %u bytes, but only %zd",
742 type, tsb->size, n);
743 return -1;
744 }
745
746
747 n = qemu_chr_fe_read_all(&tpm_emu->ctrl_chr,
748 (uint8_t *)&pss, sizeof(pss.u.resp));
749 if (n != sizeof(pss.u.resp)) {
750 error_report("tpm-emulator: Reading response from writing stateblob "
751 "(type %d) failed; expected %zu bytes, got %zd", type,
752 sizeof(pss.u.resp), n);
753 return -1;
754 }
755
756 tpm_result = be32_to_cpu(pss.u.resp.tpm_result);
757 if (tpm_result != 0) {
758 error_report("tpm-emulator: Setting the stateblob (type %d) failed "
759 "with a TPM error 0x%x", type, tpm_result);
760 return -1;
761 }
762
763 trace_tpm_emulator_set_state_blob(type, tsb->size, flags);
764
765 return 0;
766}
767
768
769
770
771
772
773static int tpm_emulator_set_state_blobs(TPMBackend *tb)
774{
775 TPMEmulator *tpm_emu = TPM_EMULATOR(tb);
776 TPMBlobBuffers *state_blobs = &tpm_emu->state_blobs;
777
778 trace_tpm_emulator_set_state_blobs();
779
780 if (tpm_emulator_stop_tpm(tb) < 0) {
781 trace_tpm_emulator_set_state_blobs_error("Could not stop TPM");
782 return -EIO;
783 }
784
785 if (tpm_emulator_set_state_blob(tpm_emu, PTM_BLOB_TYPE_PERMANENT,
786 &state_blobs->permanent,
787 state_blobs->permanent_flags) < 0 ||
788 tpm_emulator_set_state_blob(tpm_emu, PTM_BLOB_TYPE_VOLATILE,
789 &state_blobs->volatil,
790 state_blobs->volatil_flags) < 0 ||
791 tpm_emulator_set_state_blob(tpm_emu, PTM_BLOB_TYPE_SAVESTATE,
792 &state_blobs->savestate,
793 state_blobs->savestate_flags) < 0) {
794 return -EIO;
795 }
796
797 trace_tpm_emulator_set_state_blobs_done();
798
799 return 0;
800}
801
802static int tpm_emulator_pre_save(void *opaque)
803{
804 TPMBackend *tb = opaque;
805 TPMEmulator *tpm_emu = TPM_EMULATOR(tb);
806
807 trace_tpm_emulator_pre_save();
808
809 tpm_backend_finish_sync(tb);
810
811
812 return tpm_emulator_get_state_blobs(tpm_emu);
813}
814
815
816
817
818
819
820static int tpm_emulator_post_load(void *opaque, int version_id)
821{
822 TPMBackend *tb = opaque;
823 int ret;
824
825 ret = tpm_emulator_set_state_blobs(tb);
826 if (ret < 0) {
827 return ret;
828 }
829
830 if (tpm_emulator_startup_tpm_resume(tb, 0, true) < 0) {
831 return -EIO;
832 }
833
834 return 0;
835}
836
837static const VMStateDescription vmstate_tpm_emulator = {
838 .name = "tpm-emulator",
839 .version_id = 0,
840 .pre_save = tpm_emulator_pre_save,
841 .post_load = tpm_emulator_post_load,
842 .fields = (VMStateField[]) {
843 VMSTATE_UINT32(state_blobs.permanent_flags, TPMEmulator),
844 VMSTATE_UINT32(state_blobs.permanent.size, TPMEmulator),
845 VMSTATE_VBUFFER_ALLOC_UINT32(state_blobs.permanent.buffer,
846 TPMEmulator, 0, 0,
847 state_blobs.permanent.size),
848
849 VMSTATE_UINT32(state_blobs.volatil_flags, TPMEmulator),
850 VMSTATE_UINT32(state_blobs.volatil.size, TPMEmulator),
851 VMSTATE_VBUFFER_ALLOC_UINT32(state_blobs.volatil.buffer,
852 TPMEmulator, 0, 0,
853 state_blobs.volatil.size),
854
855 VMSTATE_UINT32(state_blobs.savestate_flags, TPMEmulator),
856 VMSTATE_UINT32(state_blobs.savestate.size, TPMEmulator),
857 VMSTATE_VBUFFER_ALLOC_UINT32(state_blobs.savestate.buffer,
858 TPMEmulator, 0, 0,
859 state_blobs.savestate.size),
860
861 VMSTATE_END_OF_LIST()
862 }
863};
864
865static void tpm_emulator_inst_init(Object *obj)
866{
867 TPMEmulator *tpm_emu = TPM_EMULATOR(obj);
868
869 trace_tpm_emulator_inst_init();
870
871 tpm_emu->options = g_new0(TPMEmulatorOptions, 1);
872 tpm_emu->cur_locty_number = ~0;
873 qemu_mutex_init(&tpm_emu->mutex);
874
875 vmstate_register(NULL, -1, &vmstate_tpm_emulator, obj);
876}
877
878
879
880
881static void tpm_emulator_shutdown(TPMEmulator *tpm_emu)
882{
883 ptm_res res;
884
885 if (tpm_emulator_ctrlcmd(tpm_emu, CMD_SHUTDOWN, &res, 0, sizeof(res)) < 0) {
886 error_report("tpm-emulator: Could not cleanly shutdown the TPM: %s",
887 strerror(errno));
888 } else if (res != 0) {
889 error_report("tpm-emulator: TPM result for sutdown: 0x%x",
890 be32_to_cpu(res));
891 }
892}
893
894static void tpm_emulator_inst_finalize(Object *obj)
895{
896 TPMEmulator *tpm_emu = TPM_EMULATOR(obj);
897 TPMBlobBuffers *state_blobs = &tpm_emu->state_blobs;
898
899 tpm_emulator_shutdown(tpm_emu);
900
901 object_unref(OBJECT(tpm_emu->data_ioc));
902
903 qemu_chr_fe_deinit(&tpm_emu->ctrl_chr, false);
904
905 qapi_free_TPMEmulatorOptions(tpm_emu->options);
906
907 if (tpm_emu->migration_blocker) {
908 migrate_del_blocker(tpm_emu->migration_blocker);
909 error_free(tpm_emu->migration_blocker);
910 }
911
912 tpm_sized_buffer_reset(&state_blobs->volatil);
913 tpm_sized_buffer_reset(&state_blobs->permanent);
914 tpm_sized_buffer_reset(&state_blobs->savestate);
915
916 qemu_mutex_destroy(&tpm_emu->mutex);
917
918 vmstate_unregister(NULL, &vmstate_tpm_emulator, obj);
919}
920
921static void tpm_emulator_class_init(ObjectClass *klass, void *data)
922{
923 TPMBackendClass *tbc = TPM_BACKEND_CLASS(klass);
924
925 tbc->type = TPM_TYPE_EMULATOR;
926 tbc->opts = tpm_emulator_cmdline_opts;
927 tbc->desc = "TPM emulator backend driver";
928 tbc->create = tpm_emulator_create;
929 tbc->startup_tpm = tpm_emulator_startup_tpm;
930 tbc->cancel_cmd = tpm_emulator_cancel_cmd;
931 tbc->get_tpm_established_flag = tpm_emulator_get_tpm_established_flag;
932 tbc->reset_tpm_established_flag = tpm_emulator_reset_tpm_established_flag;
933 tbc->get_tpm_version = tpm_emulator_get_tpm_version;
934 tbc->get_buffer_size = tpm_emulator_get_buffer_size;
935 tbc->get_tpm_options = tpm_emulator_get_tpm_options;
936
937 tbc->handle_request = tpm_emulator_handle_request;
938}
939
940static const TypeInfo tpm_emulator_info = {
941 .name = TYPE_TPM_EMULATOR,
942 .parent = TYPE_TPM_BACKEND,
943 .instance_size = sizeof(TPMEmulator),
944 .class_init = tpm_emulator_class_init,
945 .instance_init = tpm_emulator_inst_init,
946 .instance_finalize = tpm_emulator_inst_finalize,
947};
948
949static void tpm_emulator_register(void)
950{
951 type_register_static(&tpm_emulator_info);
952}
953
954type_init(tpm_emulator_register)
955
