| 1 | /* |
| 2 | * Emulator TPM driver |
| 3 | * |
| 4 | * Copyright (c) 2017 Intel Corporation |
| 5 | * Author: Amarnath Valluri <amarnath.valluri@intel.com> |
| 6 | * |
| 7 | * Copyright (c) 2010 - 2013, 2018 IBM Corporation |
| 8 | * Authors: |
| 9 | * Stefan Berger <stefanb@us.ibm.com> |
| 10 | * |
| 11 | * Copyright (C) 2011 IAIK, Graz University of Technology |
| 12 | * Author: Andreas Niederl |
| 13 | * |
| 14 | * This library is free software; you can redistribute it and/or |
| 15 | * modify it under the terms of the GNU Lesser General Public |
| 16 | * License as published by the Free Software Foundation; either |
| 17 | * version 2.1 of the License, or (at your option) any later version. |
| 18 | * |
| 19 | * This library is distributed in the hope that it will be useful, |
| 20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 22 | * Lesser General Public License for more details. |
| 23 | * |
| 24 | * You should have received a copy of the GNU Lesser General Public |
| 25 | * License along with this library; if not, see <http://www.gnu.org/licenses/> |
| 26 | * |
| 27 | */ |
| 28 | |
| 29 | #include "qemu/osdep.h" |
| 30 | #include "qemu/error-report.h" |
| 31 | #include "qemu/module.h" |
| 32 | #include "qemu/sockets.h" |
| 33 | #include "qemu/lockable.h" |
| 34 | #include "io/channel-socket.h" |
| 35 | #include "system/runstate.h" |
| 36 | #include "system/tpm_backend.h" |
| 37 | #include "system/tpm_util.h" |
| 38 | #include "tpm_int.h" |
| 39 | #include "tpm_ioctl.h" |
| 40 | #include "migration/blocker.h" |
| 41 | #include "migration/vmstate.h" |
| 42 | #include "qapi/error.h" |
| 43 | #include "qapi/clone-visitor.h" |
| 44 | #include "qapi/qapi-visit-tpm.h" |
| 45 | #include "chardev/char-fe.h" |
| 46 | #include "trace.h" |
| 47 | #include "qom/object.h" |
| 48 | |
| 49 | #define TYPE_TPM_EMULATOR "tpm-emulator" |
| 50 | OBJECT_DECLARE_SIMPLE_TYPE(TPMEmulator, TPM_EMULATOR) |
| 51 | |
| 52 | #define TPM_EMULATOR_IMPLEMENTS_ALL_CAPS(S, cap) (((S)->caps & (cap)) == (cap)) |
| 53 | |
| 54 | /* data structures */ |
| 55 | |
| 56 | /* blobs from the TPM; part of VM state when migrating */ |
| 57 | typedef struct TPMBlobBuffers { |
| 58 | uint32_t permanent_flags; |
| 59 | TPMSizedBuffer permanent; |
| 60 | |
| 61 | uint32_t volatil_flags; |
| 62 | TPMSizedBuffer volatil; |
| 63 | |
| 64 | uint32_t savestate_flags; |
| 65 | TPMSizedBuffer savestate; |
| 66 | } TPMBlobBuffers; |
| 67 | |
| 68 | struct TPMEmulator { |
| 69 | TPMBackend parent; |
| 70 | |
| 71 | TPMEmulatorOptions *options; |
| 72 | CharFrontend ctrl_chr; |
| 73 | QIOChannel *data_ioc; |
| 74 | TPMVersion tpm_version; |
| 75 | uint32_t caps; /* capabilities of the TPM */ |
| 76 | uint8_t cur_locty_number; /* last set locality */ |
| 77 | Error *migration_blocker; |
| 78 | |
| 79 | QemuMutex mutex; |
| 80 | |
| 81 | unsigned int established_flag:1; |
| 82 | unsigned int established_flag_cached:1; |
| 83 | |
| 84 | TPMBlobBuffers state_blobs; |
| 85 | |
| 86 | bool relock_storage; |
| 87 | VMChangeStateEntry *vmstate; |
| 88 | }; |
| 89 | |
| 90 | struct tpm_error { |
| 91 | uint32_t tpm_result; |
| 92 | const char *string; |
| 93 | }; |
| 94 | |
| 95 | static const struct tpm_error tpm_errors[] = { |
| 96 | /* TPM 1.2 error codes */ |
| 97 | { TPM_BAD_PARAMETER , "a parameter is bad" }, |
| 98 | { TPM_FAIL , "operation failed" }, |
| 99 | { TPM_KEYNOTFOUND , "key could not be found" }, |
| 100 | { TPM_BAD_PARAM_SIZE , "bad parameter size"}, |
| 101 | { TPM_ENCRYPT_ERROR , "encryption error" }, |
| 102 | { TPM_DECRYPT_ERROR , "decryption error" }, |
| 103 | { TPM_BAD_KEY_PROPERTY, "bad key property" }, |
| 104 | { TPM_BAD_MODE , "bad (encryption) mode" }, |
| 105 | { TPM_BAD_VERSION , "bad version identifier" }, |
| 106 | { TPM_BAD_LOCALITY , "bad locality" }, |
| 107 | /* TPM 2 error codes */ |
| 108 | { TPM_RC_FAILURE , "operation failed" }, |
| 109 | { TPM_RC_LOCALITY , "bad locality" }, |
| 110 | { TPM_RC_INSUFFICIENT, "insufficient amount of data" }, |
| 111 | }; |
| 112 | |
| 113 | static const char *tpm_emulator_strerror(uint32_t tpm_result) |
| 114 | { |
| 115 | size_t i; |
| 116 | |
| 117 | for (i = 0; i < ARRAY_SIZE(tpm_errors); i++) { |
| 118 | if (tpm_errors[i].tpm_result == tpm_result) { |
| 119 | return tpm_errors[i].string; |
| 120 | } |
| 121 | } |
| 122 | return ""; |
| 123 | } |
| 124 | |
| 125 | static int tpm_emulator_ctrlcmd(TPMEmulator *tpm, unsigned long cmd, void *msg, |
| 126 | size_t msg_len_in, size_t msg_len_out_err, |
| 127 | size_t msg_len_out_total) |
| 128 | { |
| 129 | CharFrontend *dev = &tpm->ctrl_chr; |
| 130 | uint32_t cmd_no = cpu_to_be32(cmd); |
| 131 | ssize_t n = sizeof(uint32_t) + msg_len_in; |
| 132 | ptm_res res; |
| 133 | |
| 134 | WITH_QEMU_LOCK_GUARD(&tpm->mutex) { |
| 135 | g_autofree uint8_t *buf = g_malloc(n); |
| 136 | |
| 137 | memcpy(buf, &cmd_no, sizeof(cmd_no)); |
| 138 | memcpy(buf + sizeof(cmd_no), msg, msg_len_in); |
| 139 | |
| 140 | n = qemu_chr_fe_write_all(dev, buf, n); |
| 141 | if (n <= 0) { |
| 142 | return -1; |
| 143 | } |
| 144 | |
| 145 | if (msg_len_out_total > 0) { |
| 146 | assert(msg_len_out_total >= msg_len_out_err); |
| 147 | |
| 148 | n = qemu_chr_fe_read_all(dev, (uint8_t *)msg, msg_len_out_err); |
| 149 | if (n <= 0) { |
| 150 | return -1; |
| 151 | } |
| 152 | if (msg_len_out_err == msg_len_out_total) { |
| 153 | return 0; |
| 154 | } |
| 155 | /* result error code is always in the first 4 bytes */ |
| 156 | assert(sizeof(res) <= msg_len_out_err); |
| 157 | memcpy(&res, msg, sizeof(res)); |
| 158 | if (res) { |
| 159 | return 0; |
| 160 | } |
| 161 | |
| 162 | n = qemu_chr_fe_read_all(dev, (uint8_t *)msg + msg_len_out_err, |
| 163 | msg_len_out_total - msg_len_out_err); |
| 164 | if (n <= 0) { |
| 165 | return -1; |
| 166 | } |
| 167 | } |
| 168 | } |
| 169 | |
| 170 | return 0; |
| 171 | } |
| 172 | |
| 173 | static int tpm_emulator_unix_tx_bufs(TPMEmulator *tpm_emu, |
| 174 | const uint8_t *in, uint32_t in_len, |
| 175 | uint8_t *out, uint32_t out_len, |
| 176 | bool *selftest_done, |
| 177 | Error **errp) |
| 178 | { |
| 179 | bool is_selftest = false; |
| 180 | Error *local_err = NULL; |
| 181 | uint32_t to_read; |
| 182 | ssize_t ret; |
| 183 | |
| 184 | if (selftest_done) { |
| 185 | *selftest_done = false; |
| 186 | is_selftest = tpm_util_is_selftest(in, in_len); |
| 187 | } |
| 188 | |
| 189 | ret = qio_channel_write_all(tpm_emu->data_ioc, (char *)in, in_len, errp); |
| 190 | if (ret != 0) { |
| 191 | return -1; |
| 192 | } |
| 193 | |
| 194 | ret = qio_channel_read_all(tpm_emu->data_ioc, (char *)out, |
| 195 | sizeof(struct tpm_resp_hdr), errp); |
| 196 | if (ret != 0) { |
| 197 | return -1; |
| 198 | } |
| 199 | |
| 200 | /* |
| 201 | * Size of response from emulator must be <= out_len (= negotiated buffer |
| 202 | * size) |
| 203 | */ |
| 204 | to_read = tpm_cmd_get_size(out); |
| 205 | if (to_read > out_len) { |
| 206 | if (qio_channel_shutdown(tpm_emu->data_ioc, QIO_CHANNEL_SHUTDOWN_BOTH, |
| 207 | &local_err) < 0) { |
| 208 | error_report_err(local_err); |
| 209 | } |
| 210 | error_setg(errp, "tpm-emulator: Disconnected after receiving " |
| 211 | "unacceptable large response (%u > %u)", |
| 212 | to_read, out_len); |
| 213 | return -1; |
| 214 | } |
| 215 | |
| 216 | ret = qio_channel_read_all(tpm_emu->data_ioc, |
| 217 | (char *)out + sizeof(struct tpm_resp_hdr), |
| 218 | to_read - sizeof(struct tpm_resp_hdr), errp); |
| 219 | if (ret != 0) { |
| 220 | return -1; |
| 221 | } |
| 222 | |
| 223 | if (is_selftest) { |
| 224 | *selftest_done = tpm_cmd_get_errcode(out) == 0; |
| 225 | } |
| 226 | |
| 227 | return 0; |
| 228 | } |
| 229 | |
| 230 | static int tpm_emulator_set_locality(TPMEmulator *tpm_emu, uint8_t locty_number, |
| 231 | Error **errp) |
| 232 | { |
| 233 | ptm_loc loc; |
| 234 | |
| 235 | if (tpm_emu->cur_locty_number == locty_number) { |
| 236 | return 0; |
| 237 | } |
| 238 | |
| 239 | trace_tpm_emulator_set_locality(locty_number); |
| 240 | |
| 241 | memset(&loc, 0, sizeof(loc)); |
| 242 | loc.u.req.loc = locty_number; |
| 243 | if (tpm_emulator_ctrlcmd(tpm_emu, CMD_SET_LOCALITY, &loc, |
| 244 | sizeof(loc), sizeof(loc.u.resp.tpm_result), |
| 245 | sizeof(loc)) < 0) { |
| 246 | error_setg(errp, "tpm-emulator: could not set locality"); |
| 247 | return -1; |
| 248 | } |
| 249 | |
| 250 | loc.u.resp.tpm_result = be32_to_cpu(loc.u.resp.tpm_result); |
| 251 | if (loc.u.resp.tpm_result != 0) { |
| 252 | error_setg(errp, "tpm-emulator: TPM result for set locality : 0x%x", |
| 253 | loc.u.resp.tpm_result); |
| 254 | return -1; |
| 255 | } |
| 256 | |
| 257 | tpm_emu->cur_locty_number = locty_number; |
| 258 | |
| 259 | return 0; |
| 260 | } |
| 261 | |
| 262 | static void tpm_emulator_handle_request(TPMBackend *tb, TPMBackendCmd *cmd, |
| 263 | Error **errp) |
| 264 | { |
| 265 | TPMEmulator *tpm_emu = TPM_EMULATOR(tb); |
| 266 | |
| 267 | trace_tpm_emulator_handle_request(); |
| 268 | |
| 269 | if (tpm_emulator_set_locality(tpm_emu, cmd->locty, errp) < 0 || |
| 270 | tpm_emulator_unix_tx_bufs(tpm_emu, cmd->in, cmd->in_len, |
| 271 | cmd->out, cmd->out_len, |
| 272 | &cmd->selftest_done, errp) < 0) { |
| 273 | tpm_util_write_fatal_error_response(cmd->out, cmd->out_len); |
| 274 | } |
| 275 | } |
| 276 | |
| 277 | static int tpm_emulator_probe_caps(TPMEmulator *tpm_emu) |
| 278 | { |
| 279 | ptm_cap_n cap_n; |
| 280 | |
| 281 | if (tpm_emulator_ctrlcmd(tpm_emu, CMD_GET_CAPABILITY, &cap_n, 0, |
| 282 | sizeof(cap_n.u.resp.tpm_result), |
| 283 | sizeof(cap_n)) < 0) { |
| 284 | error_report("tpm-emulator: probing failed"); |
| 285 | return -1; |
| 286 | } |
| 287 | |
| 288 | tpm_emu->caps = be32_to_cpu(cap_n.u.resp.caps); |
| 289 | |
| 290 | trace_tpm_emulator_probe_caps(tpm_emu->caps); |
| 291 | |
| 292 | return 0; |
| 293 | } |
| 294 | |
| 295 | static int tpm_emulator_check_caps(TPMEmulator *tpm_emu) |
| 296 | { |
| 297 | uint32_t caps = 0; |
| 298 | const char *tpm = NULL; |
| 299 | |
| 300 | /* check for min. required capabilities */ |
| 301 | switch (tpm_emu->tpm_version) { |
| 302 | case TPM_VERSION_1_2: |
| 303 | caps = PTM_CAP_INIT | PTM_CAP_SHUTDOWN | PTM_CAP_GET_TPMESTABLISHED | |
| 304 | PTM_CAP_SET_LOCALITY | PTM_CAP_SET_DATAFD | PTM_CAP_STOP | |
| 305 | PTM_CAP_SET_BUFFERSIZE; |
| 306 | tpm = "1.2"; |
| 307 | break; |
| 308 | case TPM_VERSION_2_0: |
| 309 | caps = PTM_CAP_INIT | PTM_CAP_SHUTDOWN | PTM_CAP_GET_TPMESTABLISHED | |
| 310 | PTM_CAP_SET_LOCALITY | PTM_CAP_RESET_TPMESTABLISHED | |
| 311 | PTM_CAP_SET_DATAFD | PTM_CAP_STOP | PTM_CAP_SET_BUFFERSIZE; |
| 312 | tpm = "2"; |
| 313 | break; |
| 314 | case TPM_VERSION_UNSPEC: |
| 315 | error_report("tpm-emulator: TPM version has not been set"); |
| 316 | return -1; |
| 317 | } |
| 318 | |
| 319 | if (!TPM_EMULATOR_IMPLEMENTS_ALL_CAPS(tpm_emu, caps)) { |
| 320 | error_report("tpm-emulator: TPM does not implement minimum set of " |
| 321 | "required capabilities for TPM %s (0x%x)", tpm, (int)caps); |
| 322 | return -1; |
| 323 | } |
| 324 | |
| 325 | return 0; |
| 326 | } |
| 327 | |
| 328 | static int tpm_emulator_stop_tpm(TPMBackend *tb, Error **errp) |
| 329 | { |
| 330 | TPMEmulator *tpm_emu = TPM_EMULATOR(tb); |
| 331 | ptm_res res; |
| 332 | |
| 333 | if (tpm_emulator_ctrlcmd(tpm_emu, CMD_STOP, &res, 0, |
| 334 | sizeof(ptm_res), sizeof(res)) < 0) { |
| 335 | error_setg(errp, "tpm-emulator: Could not stop TPM"); |
| 336 | return -1; |
| 337 | } |
| 338 | |
| 339 | res = be32_to_cpu(res); |
| 340 | if (res) { |
| 341 | error_setg(errp, "tpm-emulator: TPM result for CMD_STOP: 0x%x %s", res, |
| 342 | tpm_emulator_strerror(res)); |
| 343 | return -1; |
| 344 | } |
| 345 | |
| 346 | return 0; |
| 347 | } |
| 348 | |
| 349 | static int tpm_emulator_lock_storage(TPMEmulator *tpm_emu) |
| 350 | { |
| 351 | ptm_lockstorage pls; |
| 352 | |
| 353 | if (!TPM_EMULATOR_IMPLEMENTS_ALL_CAPS(tpm_emu, PTM_CAP_LOCK_STORAGE)) { |
| 354 | trace_tpm_emulator_lock_storage_cmd_not_supt(); |
| 355 | return 0; |
| 356 | } |
| 357 | |
| 358 | /* give failing side 300 * 10ms time to release lock */ |
| 359 | pls.u.req.retries = cpu_to_be32(300); |
| 360 | if (tpm_emulator_ctrlcmd(tpm_emu, CMD_LOCK_STORAGE, &pls, sizeof(pls.u.req), |
| 361 | sizeof(pls.u.resp.tpm_result), |
| 362 | sizeof(pls.u.resp)) < 0) { |
| 363 | error_report("tpm-emulator: Could not lock storage within 3 seconds"); |
| 364 | return -1; |
| 365 | } |
| 366 | |
| 367 | pls.u.resp.tpm_result = be32_to_cpu(pls.u.resp.tpm_result); |
| 368 | if (pls.u.resp.tpm_result != 0) { |
| 369 | error_report("tpm-emulator: TPM result for CMD_LOCK_STORAGE: 0x%x %s", |
| 370 | pls.u.resp.tpm_result, |
| 371 | tpm_emulator_strerror(pls.u.resp.tpm_result)); |
| 372 | return -1; |
| 373 | } |
| 374 | |
| 375 | return 0; |
| 376 | } |
| 377 | |
| 378 | static int tpm_emulator_set_buffer_size(TPMBackend *tb, |
| 379 | size_t wanted_size, |
| 380 | size_t *actual_size, |
| 381 | Error **errp) |
| 382 | { |
| 383 | TPMEmulator *tpm_emu = TPM_EMULATOR(tb); |
| 384 | ptm_setbuffersize psbs; |
| 385 | size_t tpm_buffersize; |
| 386 | |
| 387 | if (tpm_emulator_stop_tpm(tb, errp) < 0) { |
| 388 | return -1; |
| 389 | } |
| 390 | |
| 391 | psbs.u.req.buffersize = cpu_to_be32(wanted_size); |
| 392 | |
| 393 | if (tpm_emulator_ctrlcmd(tpm_emu, CMD_SET_BUFFERSIZE, &psbs, |
| 394 | sizeof(psbs.u.req), sizeof(psbs.u.resp.tpm_result), |
| 395 | sizeof(psbs.u.resp)) < 0) { |
| 396 | error_setg(errp, "tpm-emulator: Could not set buffer size"); |
| 397 | return -1; |
| 398 | } |
| 399 | |
| 400 | psbs.u.resp.tpm_result = be32_to_cpu(psbs.u.resp.tpm_result); |
| 401 | if (psbs.u.resp.tpm_result != 0) { |
| 402 | error_setg(errp, |
| 403 | "tpm-emulator: TPM result for set buffer size : 0x%x %s", |
| 404 | psbs.u.resp.tpm_result, |
| 405 | tpm_emulator_strerror(psbs.u.resp.tpm_result)); |
| 406 | return -1; |
| 407 | } |
| 408 | |
| 409 | tpm_buffersize = be32_to_cpu(psbs.u.resp.buffersize); |
| 410 | /* Reject different buffer size used by the TPM than what was requested. */ |
| 411 | if (wanted_size != 0 && wanted_size != tpm_buffersize) { |
| 412 | error_setg(errp, |
| 413 | "tpm-emulator: TPM did not accept the requested buffer size " |
| 414 | "of %zu bytes but adjusted it to %zu bytes", |
| 415 | wanted_size, tpm_buffersize); |
| 416 | return -1; |
| 417 | } |
| 418 | |
| 419 | if (actual_size) { |
| 420 | *actual_size = tpm_buffersize; |
| 421 | } |
| 422 | |
| 423 | trace_tpm_emulator_set_buffer_size( |
| 424 | be32_to_cpu(psbs.u.resp.buffersize), |
| 425 | be32_to_cpu(psbs.u.resp.minsize), |
| 426 | be32_to_cpu(psbs.u.resp.maxsize)); |
| 427 | |
| 428 | return 0; |
| 429 | } |
| 430 | |
| 431 | static int tpm_emulator_startup_tpm_resume(TPMBackend *tb, size_t buffersize, |
| 432 | bool is_resume, Error **errp) |
| 433 | { |
| 434 | TPMEmulator *tpm_emu = TPM_EMULATOR(tb); |
| 435 | ptm_init init = { |
| 436 | .u.req.init_flags = 0, |
| 437 | }; |
| 438 | ptm_res res; |
| 439 | |
| 440 | trace_tpm_emulator_startup_tpm_resume(is_resume, buffersize); |
| 441 | |
| 442 | if (buffersize != 0 && |
| 443 | tpm_emulator_set_buffer_size(tb, buffersize, NULL, errp) < 0) { |
| 444 | goto err_exit; |
| 445 | } |
| 446 | |
| 447 | if (is_resume) { |
| 448 | init.u.req.init_flags |= cpu_to_be32(PTM_INIT_FLAG_DELETE_VOLATILE); |
| 449 | } |
| 450 | |
| 451 | if (tpm_emulator_ctrlcmd(tpm_emu, CMD_INIT, &init, sizeof(init), |
| 452 | sizeof(init.u.resp.tpm_result), |
| 453 | sizeof(init)) < 0) { |
| 454 | error_setg(errp, "tpm-emulator: could not send INIT"); |
| 455 | goto err_exit; |
| 456 | } |
| 457 | |
| 458 | res = be32_to_cpu(init.u.resp.tpm_result); |
| 459 | if (res) { |
| 460 | error_setg(errp, "tpm-emulator: TPM result for CMD_INIT: 0x%x %s", res, |
| 461 | tpm_emulator_strerror(res)); |
| 462 | goto err_exit; |
| 463 | } |
| 464 | return 0; |
| 465 | |
| 466 | err_exit: |
| 467 | return -1; |
| 468 | } |
| 469 | |
| 470 | static int do_tpm_emulator_startup_tpm(TPMBackend *tb, size_t buffersize, |
| 471 | Error **errp) |
| 472 | { |
| 473 | /* TPM startup will be done from post_load hook */ |
| 474 | if (runstate_check(RUN_STATE_INMIGRATE)) { |
| 475 | if (buffersize != 0) { |
| 476 | return tpm_emulator_set_buffer_size(tb, buffersize, NULL, errp); |
| 477 | } |
| 478 | |
| 479 | return 0; |
| 480 | } |
| 481 | |
| 482 | return tpm_emulator_startup_tpm_resume(tb, buffersize, false, errp); |
| 483 | } |
| 484 | |
| 485 | static int tpm_emulator_startup_tpm(TPMBackend *tb, size_t buffersize) |
| 486 | { |
| 487 | Error *local_err = NULL; |
| 488 | int ret = do_tpm_emulator_startup_tpm(tb, buffersize, &local_err); |
| 489 | |
| 490 | if (ret < 0) { |
| 491 | error_report_err(local_err); |
| 492 | } |
| 493 | |
| 494 | return ret; |
| 495 | } |
| 496 | |
| 497 | static bool tpm_emulator_get_tpm_established_flag(TPMBackend *tb) |
| 498 | { |
| 499 | TPMEmulator *tpm_emu = TPM_EMULATOR(tb); |
| 500 | ptm_est est; |
| 501 | |
| 502 | if (tpm_emu->established_flag_cached) { |
| 503 | return tpm_emu->established_flag; |
| 504 | } |
| 505 | |
| 506 | if (tpm_emulator_ctrlcmd(tpm_emu, CMD_GET_TPMESTABLISHED, &est, 0, |
| 507 | sizeof(est) /* always returns resp.bit */, |
| 508 | sizeof(est)) < 0) { |
| 509 | error_report("tpm-emulator: Could not get the TPM established flag"); |
| 510 | return false; |
| 511 | } |
| 512 | trace_tpm_emulator_get_tpm_established_flag(est.u.resp.bit); |
| 513 | |
| 514 | tpm_emu->established_flag_cached = 1; |
| 515 | tpm_emu->established_flag = (est.u.resp.bit != 0); |
| 516 | |
| 517 | return tpm_emu->established_flag; |
| 518 | } |
| 519 | |
| 520 | static int tpm_emulator_reset_tpm_established_flag(TPMBackend *tb, |
| 521 | uint8_t locty) |
| 522 | { |
| 523 | TPMEmulator *tpm_emu = TPM_EMULATOR(tb); |
| 524 | ptm_reset_est reset_est; |
| 525 | ptm_res res; |
| 526 | |
| 527 | /* only a TPM 2.0 will support this */ |
| 528 | if (tpm_emu->tpm_version != TPM_VERSION_2_0) { |
| 529 | return 0; |
| 530 | } |
| 531 | |
| 532 | reset_est.u.req.loc = tpm_emu->cur_locty_number; |
| 533 | if (tpm_emulator_ctrlcmd(tpm_emu, CMD_RESET_TPMESTABLISHED, |
| 534 | &reset_est, sizeof(reset_est), |
| 535 | sizeof(reset_est.u.resp.tpm_result), |
| 536 | sizeof(reset_est)) < 0) { |
| 537 | error_report("tpm-emulator: Could not reset the establishment bit"); |
| 538 | return -1; |
| 539 | } |
| 540 | |
| 541 | res = be32_to_cpu(reset_est.u.resp.tpm_result); |
| 542 | if (res) { |
| 543 | error_report( |
| 544 | "tpm-emulator: TPM result for rest established flag: 0x%x %s", |
| 545 | res, tpm_emulator_strerror(res)); |
| 546 | return -1; |
| 547 | } |
| 548 | |
| 549 | tpm_emu->established_flag_cached = 0; |
| 550 | |
| 551 | return 0; |
| 552 | } |
| 553 | |
| 554 | static void tpm_emulator_cancel_cmd(TPMBackend *tb) |
| 555 | { |
| 556 | TPMEmulator *tpm_emu = TPM_EMULATOR(tb); |
| 557 | ptm_res res; |
| 558 | |
| 559 | if (!TPM_EMULATOR_IMPLEMENTS_ALL_CAPS(tpm_emu, PTM_CAP_CANCEL_TPM_CMD)) { |
| 560 | trace_tpm_emulator_cancel_cmd_not_supt(); |
| 561 | return; |
| 562 | } |
| 563 | |
| 564 | /* FIXME: make the function non-blocking, or it may block a VCPU */ |
| 565 | if (tpm_emulator_ctrlcmd(tpm_emu, CMD_CANCEL_TPM_CMD, &res, 0, |
| 566 | sizeof(ptm_res), sizeof(res)) < 0) { |
| 567 | error_report("tpm-emulator: Could not cancel command"); |
| 568 | } else if (res != 0) { |
| 569 | error_report("tpm-emulator: Failed to cancel TPM: 0x%x", |
| 570 | be32_to_cpu(res)); |
| 571 | } |
| 572 | } |
| 573 | |
| 574 | static TPMVersion tpm_emulator_get_tpm_version(TPMBackend *tb) |
| 575 | { |
| 576 | TPMEmulator *tpm_emu = TPM_EMULATOR(tb); |
| 577 | |
| 578 | return tpm_emu->tpm_version; |
| 579 | } |
| 580 | |
| 581 | static size_t tpm_emulator_get_buffer_size(TPMBackend *tb) |
| 582 | { |
| 583 | size_t actual_size; |
| 584 | Error *local_err = NULL; |
| 585 | |
| 586 | if (tpm_emulator_set_buffer_size(tb, 0, &actual_size, &local_err) < 0) { |
| 587 | error_report_err(local_err); |
| 588 | return 4096; |
| 589 | } |
| 590 | |
| 591 | return actual_size; |
| 592 | } |
| 593 | |
| 594 | static int tpm_emulator_block_migration(TPMEmulator *tpm_emu) |
| 595 | { |
| 596 | Error *err = NULL; |
| 597 | uint32_t caps = PTM_CAP_GET_STATEBLOB | PTM_CAP_SET_STATEBLOB | |
| 598 | PTM_CAP_STOP; |
| 599 | |
| 600 | if (!TPM_EMULATOR_IMPLEMENTS_ALL_CAPS(tpm_emu, caps)) { |
| 601 | error_setg(&tpm_emu->migration_blocker, |
| 602 | "Migration disabled: TPM emulator does not support " |
| 603 | "migration"); |
| 604 | if (migrate_add_blocker(&tpm_emu->migration_blocker, &err) < 0) { |
| 605 | error_report_err(err); |
| 606 | return -1; |
| 607 | } |
| 608 | } |
| 609 | |
| 610 | return 0; |
| 611 | } |
| 612 | |
| 613 | static int tpm_emulator_prepare_data_fd(TPMEmulator *tpm_emu) |
| 614 | { |
| 615 | ptm_res res; |
| 616 | Error *err = NULL; |
| 617 | int fds[2] = { -1, -1 }; |
| 618 | |
| 619 | if (qemu_socketpair(AF_UNIX, SOCK_STREAM, 0, fds) < 0) { |
| 620 | error_report("tpm-emulator: Failed to create socketpair"); |
| 621 | return -1; |
| 622 | } |
| 623 | |
| 624 | qemu_chr_fe_set_msgfds(&tpm_emu->ctrl_chr, fds + 1, 1); |
| 625 | |
| 626 | if (tpm_emulator_ctrlcmd(tpm_emu, CMD_SET_DATAFD, &res, 0, |
| 627 | sizeof(ptm_res), sizeof(res)) < 0 || res != 0) { |
| 628 | error_report("tpm-emulator: Failed to send CMD_SET_DATAFD"); |
| 629 | goto err_exit; |
| 630 | } |
| 631 | |
| 632 | tpm_emu->data_ioc = QIO_CHANNEL(qio_channel_socket_new_fd(fds[0], &err)); |
| 633 | if (err) { |
| 634 | error_prepend(&err, "tpm-emulator: Failed to create io channel: "); |
| 635 | error_report_err(err); |
| 636 | goto err_exit; |
| 637 | } |
| 638 | |
| 639 | close(fds[1]); |
| 640 | |
| 641 | return 0; |
| 642 | |
| 643 | err_exit: |
| 644 | close(fds[0]); |
| 645 | close(fds[1]); |
| 646 | return -1; |
| 647 | } |
| 648 | |
| 649 | static int tpm_emulator_handle_device_opts(TPMEmulator *tpm_emu, QemuOpts *opts) |
| 650 | { |
| 651 | const char *value; |
| 652 | Error *err = NULL; |
| 653 | Chardev *dev; |
| 654 | |
| 655 | value = qemu_opt_get(opts, "chardev"); |
| 656 | if (!value) { |
| 657 | error_report("tpm-emulator: parameter 'chardev' is missing"); |
| 658 | goto err; |
| 659 | } |
| 660 | |
| 661 | dev = qemu_chr_find(value); |
| 662 | if (!dev) { |
| 663 | error_report("tpm-emulator: tpm chardev '%s' not found", value); |
| 664 | goto err; |
| 665 | } |
| 666 | |
| 667 | if (!qemu_chr_fe_init(&tpm_emu->ctrl_chr, dev, &err)) { |
| 668 | error_prepend(&err, "tpm-emulator: No valid chardev found at '%s':", |
| 669 | value); |
| 670 | error_report_err(err); |
| 671 | goto err; |
| 672 | } |
| 673 | |
| 674 | tpm_emu->options->chardev = g_strdup(value); |
| 675 | |
| 676 | if (tpm_emulator_prepare_data_fd(tpm_emu) < 0) { |
| 677 | goto err; |
| 678 | } |
| 679 | |
| 680 | /* FIXME: tpm_util_test_tpmdev() accepts only on socket fd, as it also used |
| 681 | * by passthrough driver, which not yet using GIOChannel. |
| 682 | */ |
| 683 | if (tpm_util_test_tpmdev(QIO_CHANNEL_SOCKET(tpm_emu->data_ioc)->fd, |
| 684 | &tpm_emu->tpm_version)) { |
| 685 | error_report("'%s' is not emulating TPM device.", |
| 686 | tpm_emu->options->chardev); |
| 687 | goto err; |
| 688 | } |
| 689 | |
| 690 | switch (tpm_emu->tpm_version) { |
| 691 | case TPM_VERSION_1_2: |
| 692 | trace_tpm_emulator_handle_device_opts_tpm12(); |
| 693 | break; |
| 694 | case TPM_VERSION_2_0: |
| 695 | trace_tpm_emulator_handle_device_opts_tpm2(); |
| 696 | break; |
| 697 | default: |
| 698 | trace_tpm_emulator_handle_device_opts_unspec(); |
| 699 | } |
| 700 | |
| 701 | if (tpm_emulator_probe_caps(tpm_emu) || |
| 702 | tpm_emulator_check_caps(tpm_emu)) { |
| 703 | goto err; |
| 704 | } |
| 705 | |
| 706 | return tpm_emulator_block_migration(tpm_emu); |
| 707 | |
| 708 | err: |
| 709 | trace_tpm_emulator_handle_device_opts_startup_error(); |
| 710 | |
| 711 | return -1; |
| 712 | } |
| 713 | |
| 714 | static TPMBackend *tpm_emulator_create(QemuOpts *opts) |
| 715 | { |
| 716 | TPMBackend *tb = TPM_BACKEND(object_new(TYPE_TPM_EMULATOR)); |
| 717 | |
| 718 | if (tpm_emulator_handle_device_opts(TPM_EMULATOR(tb), opts)) { |
| 719 | object_unref(OBJECT(tb)); |
| 720 | return NULL; |
| 721 | } |
| 722 | |
| 723 | return tb; |
| 724 | } |
| 725 | |
| 726 | static TpmTypeOptions *tpm_emulator_get_tpm_options(TPMBackend *tb) |
| 727 | { |
| 728 | TPMEmulator *tpm_emu = TPM_EMULATOR(tb); |
| 729 | TpmTypeOptions *options = g_new0(TpmTypeOptions, 1); |
| 730 | |
| 731 | options->type = TPM_TYPE_EMULATOR; |
| 732 | options->u.emulator.data = QAPI_CLONE(TPMEmulatorOptions, tpm_emu->options); |
| 733 | |
| 734 | return options; |
| 735 | } |
| 736 | |
| 737 | static const QemuOptDesc tpm_emulator_cmdline_opts[] = { |
| 738 | TPM_STANDARD_CMDLINE_OPTS, |
| 739 | { |
| 740 | .name = "chardev", |
| 741 | .type = QEMU_OPT_STRING, |
| 742 | .help = "Character device to use for out-of-band control messages", |
| 743 | }, |
| 744 | { /* end of list */ }, |
| 745 | }; |
| 746 | |
| 747 | /* |
| 748 | * Transfer a TPM state blob from the TPM into a provided buffer. |
| 749 | * |
| 750 | * @tpm_emu: TPMEmulator |
| 751 | * @type: the type of blob to transfer |
| 752 | * @tsb: the TPMSizeBuffer to fill with the blob |
| 753 | * @flags: the flags to return to the caller |
| 754 | */ |
| 755 | static int tpm_emulator_get_state_blob(TPMEmulator *tpm_emu, |
| 756 | uint8_t type, |
| 757 | TPMSizedBuffer *tsb, |
| 758 | uint32_t *flags) |
| 759 | { |
| 760 | ptm_getstate pgs; |
| 761 | ptm_res res; |
| 762 | ssize_t n; |
| 763 | uint32_t totlength, length; |
| 764 | |
| 765 | tpm_sized_buffer_reset(tsb); |
| 766 | |
| 767 | pgs.u.req.state_flags = cpu_to_be32(PTM_STATE_FLAG_DECRYPTED); |
| 768 | pgs.u.req.type = cpu_to_be32(type); |
| 769 | pgs.u.req.offset = 0; |
| 770 | |
| 771 | if (tpm_emulator_ctrlcmd(tpm_emu, CMD_GET_STATEBLOB, |
| 772 | &pgs, sizeof(pgs.u.req), |
| 773 | /* always returns up to resp.data */ |
| 774 | offsetof(ptm_getstate, u.resp.data), |
| 775 | offsetof(ptm_getstate, u.resp.data)) < 0) { |
| 776 | error_report("tpm-emulator: could not get state blob type %d", type); |
| 777 | return -1; |
| 778 | } |
| 779 | |
| 780 | res = be32_to_cpu(pgs.u.resp.tpm_result); |
| 781 | if (res != 0 && (res & 0x800) == 0) { |
| 782 | error_report("tpm-emulator: Getting the stateblob (type %d) failed " |
| 783 | "with a TPM error 0x%x %s", type, res, |
| 784 | tpm_emulator_strerror(res)); |
| 785 | return -1; |
| 786 | } |
| 787 | |
| 788 | totlength = be32_to_cpu(pgs.u.resp.totlength); |
| 789 | length = be32_to_cpu(pgs.u.resp.length); |
| 790 | if (totlength != length) { |
| 791 | error_report("tpm-emulator: Expecting to read %u bytes " |
| 792 | "but would get %u", totlength, length); |
| 793 | return -1; |
| 794 | } |
| 795 | |
| 796 | *flags = be32_to_cpu(pgs.u.resp.state_flags); |
| 797 | |
| 798 | if (totlength > 0) { |
| 799 | tsb->buffer = g_try_malloc(totlength); |
| 800 | if (!tsb->buffer) { |
| 801 | error_report("tpm-emulator: Out of memory allocating %u bytes", |
| 802 | totlength); |
| 803 | return -1; |
| 804 | } |
| 805 | |
| 806 | n = qemu_chr_fe_read_all(&tpm_emu->ctrl_chr, tsb->buffer, totlength); |
| 807 | if (n != totlength) { |
| 808 | error_report("tpm-emulator: Could not read stateblob (type %d); " |
| 809 | "expected %u bytes, got %zd", |
| 810 | type, totlength, n); |
| 811 | return -1; |
| 812 | } |
| 813 | } |
| 814 | tsb->size = totlength; |
| 815 | |
| 816 | trace_tpm_emulator_get_state_blob(type, tsb->size, *flags); |
| 817 | |
| 818 | return 0; |
| 819 | } |
| 820 | |
| 821 | static int tpm_emulator_get_state_blobs(TPMEmulator *tpm_emu) |
| 822 | { |
| 823 | TPMBlobBuffers *state_blobs = &tpm_emu->state_blobs; |
| 824 | |
| 825 | if (tpm_emulator_get_state_blob(tpm_emu, PTM_BLOB_TYPE_PERMANENT, |
| 826 | &state_blobs->permanent, |
| 827 | &state_blobs->permanent_flags) < 0 || |
| 828 | tpm_emulator_get_state_blob(tpm_emu, PTM_BLOB_TYPE_VOLATILE, |
| 829 | &state_blobs->volatil, |
| 830 | &state_blobs->volatil_flags) < 0 || |
| 831 | tpm_emulator_get_state_blob(tpm_emu, PTM_BLOB_TYPE_SAVESTATE, |
| 832 | &state_blobs->savestate, |
| 833 | &state_blobs->savestate_flags) < 0) { |
| 834 | goto err_exit; |
| 835 | } |
| 836 | |
| 837 | return 0; |
| 838 | |
| 839 | err_exit: |
| 840 | tpm_sized_buffer_reset(&state_blobs->volatil); |
| 841 | tpm_sized_buffer_reset(&state_blobs->permanent); |
| 842 | tpm_sized_buffer_reset(&state_blobs->savestate); |
| 843 | |
| 844 | return -1; |
| 845 | } |
| 846 | |
| 847 | /* |
| 848 | * Transfer a TPM state blob to the TPM emulator. |
| 849 | * |
| 850 | * @tpm_emu: TPMEmulator |
| 851 | * @type: the type of TPM state blob to transfer |
| 852 | * @tsb: TPMSizedBuffer containing the TPM state blob |
| 853 | * @flags: Flags describing the (encryption) state of the TPM state blob |
| 854 | */ |
| 855 | static int tpm_emulator_set_state_blob(TPMEmulator *tpm_emu, |
| 856 | uint32_t type, |
| 857 | TPMSizedBuffer *tsb, |
| 858 | uint32_t flags, |
| 859 | Error **errp) |
| 860 | { |
| 861 | ssize_t n; |
| 862 | ptm_setstate pss; |
| 863 | ptm_res tpm_result; |
| 864 | |
| 865 | if (tsb->size == 0) { |
| 866 | return 0; |
| 867 | } |
| 868 | |
| 869 | pss = (ptm_setstate) { |
| 870 | .u.req.state_flags = cpu_to_be32(flags), |
| 871 | .u.req.type = cpu_to_be32(type), |
| 872 | .u.req.length = cpu_to_be32(tsb->size), |
| 873 | }; |
| 874 | |
| 875 | /* write the header only */ |
| 876 | if (tpm_emulator_ctrlcmd(tpm_emu, CMD_SET_STATEBLOB, &pss, |
| 877 | offsetof(ptm_setstate, u.req.data), 0, 0) < 0) { |
| 878 | error_setg(errp, "tpm-emulator: could not set state blob type %d", |
| 879 | type); |
| 880 | return -1; |
| 881 | } |
| 882 | |
| 883 | /* now the body */ |
| 884 | n = qemu_chr_fe_write_all(&tpm_emu->ctrl_chr, tsb->buffer, tsb->size); |
| 885 | if (n != tsb->size) { |
| 886 | error_setg(errp, "tpm-emulator: Writing the stateblob (type %d) " |
| 887 | "failed; could not write %u bytes, but only %zd", |
| 888 | type, tsb->size, n); |
| 889 | return -1; |
| 890 | } |
| 891 | |
| 892 | /* now get the result */ |
| 893 | n = qemu_chr_fe_read_all(&tpm_emu->ctrl_chr, |
| 894 | (uint8_t *)&pss, sizeof(pss.u.resp)); |
| 895 | if (n != sizeof(pss.u.resp)) { |
| 896 | error_setg(errp, "tpm-emulator: Reading response from writing " |
| 897 | "stateblob (type %d) failed; expected %zu bytes, " |
| 898 | "got %zd", type, sizeof(pss.u.resp), n); |
| 899 | return -1; |
| 900 | } |
| 901 | |
| 902 | tpm_result = be32_to_cpu(pss.u.resp.tpm_result); |
| 903 | if (tpm_result != 0) { |
| 904 | error_setg(errp, "tpm-emulator: Setting the stateblob (type %d) " |
| 905 | "failed with a TPM error 0x%x %s", type, tpm_result, |
| 906 | tpm_emulator_strerror(tpm_result)); |
| 907 | return -1; |
| 908 | } |
| 909 | |
| 910 | trace_tpm_emulator_set_state_blob(type, tsb->size, flags); |
| 911 | |
| 912 | return 0; |
| 913 | } |
| 914 | |
| 915 | /* |
| 916 | * Set all the TPM state blobs. |
| 917 | */ |
| 918 | static bool tpm_emulator_set_state_blobs(TPMBackend *tb, Error **errp) |
| 919 | { |
| 920 | TPMEmulator *tpm_emu = TPM_EMULATOR(tb); |
| 921 | TPMBlobBuffers *state_blobs = &tpm_emu->state_blobs; |
| 922 | |
| 923 | trace_tpm_emulator_set_state_blobs(); |
| 924 | |
| 925 | if (tpm_emulator_stop_tpm(tb, errp) < 0) { |
| 926 | trace_tpm_emulator_set_state_blobs_error("Could not stop TPM"); |
| 927 | return false; |
| 928 | } |
| 929 | |
| 930 | if (tpm_emulator_set_state_blob(tpm_emu, PTM_BLOB_TYPE_PERMANENT, |
| 931 | &state_blobs->permanent, |
| 932 | state_blobs->permanent_flags, errp) < 0 || |
| 933 | tpm_emulator_set_state_blob(tpm_emu, PTM_BLOB_TYPE_VOLATILE, |
| 934 | &state_blobs->volatil, |
| 935 | state_blobs->volatil_flags, errp) < 0 || |
| 936 | tpm_emulator_set_state_blob(tpm_emu, PTM_BLOB_TYPE_SAVESTATE, |
| 937 | &state_blobs->savestate, |
| 938 | state_blobs->savestate_flags, errp) < 0) { |
| 939 | return false; |
| 940 | } |
| 941 | |
| 942 | trace_tpm_emulator_set_state_blobs_done(); |
| 943 | |
| 944 | return true; |
| 945 | } |
| 946 | |
| 947 | static int tpm_emulator_pre_save(void *opaque) |
| 948 | { |
| 949 | TPMBackend *tb = opaque; |
| 950 | TPMEmulator *tpm_emu = TPM_EMULATOR(tb); |
| 951 | int ret; |
| 952 | |
| 953 | trace_tpm_emulator_pre_save(); |
| 954 | |
| 955 | tpm_backend_finish_sync(tb); |
| 956 | |
| 957 | /* get the state blobs from the TPM */ |
| 958 | ret = tpm_emulator_get_state_blobs(tpm_emu); |
| 959 | |
| 960 | tpm_emu->relock_storage = ret == 0; |
| 961 | |
| 962 | return ret; |
| 963 | } |
| 964 | |
| 965 | static void tpm_emulator_vm_state_change(void *opaque, bool running, |
| 966 | RunState state) |
| 967 | { |
| 968 | TPMBackend *tb = opaque; |
| 969 | TPMEmulator *tpm_emu = TPM_EMULATOR(tb); |
| 970 | |
| 971 | trace_tpm_emulator_vm_state_change(running, state); |
| 972 | |
| 973 | if (!running || !tpm_emu->relock_storage) { |
| 974 | return; |
| 975 | } |
| 976 | |
| 977 | /* lock storage after migration fall-back */ |
| 978 | tpm_emulator_lock_storage(tpm_emu); |
| 979 | } |
| 980 | |
| 981 | /* |
| 982 | * Load the TPM state blobs into the TPM. |
| 983 | */ |
| 984 | static bool tpm_emulator_post_load(void *opaque, int version_id, Error **errp) |
| 985 | { |
| 986 | TPMBackend *tb = opaque; |
| 987 | |
| 988 | if (!tpm_emulator_set_state_blobs(tb, errp)) { |
| 989 | return false; |
| 990 | } |
| 991 | |
| 992 | if (tpm_emulator_startup_tpm_resume(tb, 0, true, errp) < 0) { |
| 993 | return false; |
| 994 | } |
| 995 | |
| 996 | return true; |
| 997 | } |
| 998 | |
| 999 | static const VMStateDescription vmstate_tpm_emulator = { |
| 1000 | .name = "tpm-emulator", |
| 1001 | .version_id = 0, |
| 1002 | .pre_save = tpm_emulator_pre_save, |
| 1003 | .post_load_errp = tpm_emulator_post_load, |
| 1004 | .fields = (const VMStateField[]) { |
| 1005 | VMSTATE_UINT32(state_blobs.permanent_flags, TPMEmulator), |
| 1006 | VMSTATE_UINT32(state_blobs.permanent.size, TPMEmulator), |
| 1007 | VMSTATE_VBUFFER_ALLOC_UINT32(state_blobs.permanent.buffer, |
| 1008 | TPMEmulator, 0, 0, |
| 1009 | state_blobs.permanent.size), |
| 1010 | |
| 1011 | VMSTATE_UINT32(state_blobs.volatil_flags, TPMEmulator), |
| 1012 | VMSTATE_UINT32(state_blobs.volatil.size, TPMEmulator), |
| 1013 | VMSTATE_VBUFFER_ALLOC_UINT32(state_blobs.volatil.buffer, |
| 1014 | TPMEmulator, 0, 0, |
| 1015 | state_blobs.volatil.size), |
| 1016 | |
| 1017 | VMSTATE_UINT32(state_blobs.savestate_flags, TPMEmulator), |
| 1018 | VMSTATE_UINT32(state_blobs.savestate.size, TPMEmulator), |
| 1019 | VMSTATE_VBUFFER_ALLOC_UINT32(state_blobs.savestate.buffer, |
| 1020 | TPMEmulator, 0, 0, |
| 1021 | state_blobs.savestate.size), |
| 1022 | |
| 1023 | VMSTATE_END_OF_LIST() |
| 1024 | } |
| 1025 | }; |
| 1026 | |
| 1027 | static void tpm_emulator_inst_init(Object *obj) |
| 1028 | { |
| 1029 | TPMEmulator *tpm_emu = TPM_EMULATOR(obj); |
| 1030 | |
| 1031 | trace_tpm_emulator_inst_init(); |
| 1032 | |
| 1033 | tpm_emu->options = g_new0(TPMEmulatorOptions, 1); |
| 1034 | tpm_emu->cur_locty_number = ~0; |
| 1035 | qemu_mutex_init(&tpm_emu->mutex); |
| 1036 | tpm_emu->vmstate = |
| 1037 | qemu_add_vm_change_state_handler(tpm_emulator_vm_state_change, |
| 1038 | tpm_emu); |
| 1039 | |
| 1040 | vmstate_register_any(NULL, &vmstate_tpm_emulator, obj); |
| 1041 | } |
| 1042 | |
| 1043 | /* |
| 1044 | * Gracefully shut down the external TPM |
| 1045 | */ |
| 1046 | static void tpm_emulator_shutdown(TPMEmulator *tpm_emu) |
| 1047 | { |
| 1048 | ptm_res res; |
| 1049 | |
| 1050 | if (!tpm_emu->options->chardev) { |
| 1051 | /* was never properly initialized */ |
| 1052 | return; |
| 1053 | } |
| 1054 | |
| 1055 | if (tpm_emulator_ctrlcmd(tpm_emu, CMD_SHUTDOWN, &res, 0, |
| 1056 | sizeof(ptm_res), sizeof(res)) < 0) { |
| 1057 | error_report("tpm-emulator: Could not cleanly shutdown the TPM"); |
| 1058 | } else if (res != 0) { |
| 1059 | error_report("tpm-emulator: TPM result for shutdown: 0x%x %s", |
| 1060 | be32_to_cpu(res), tpm_emulator_strerror(be32_to_cpu(res))); |
| 1061 | } |
| 1062 | } |
| 1063 | |
| 1064 | static void tpm_emulator_inst_finalize(Object *obj) |
| 1065 | { |
| 1066 | TPMEmulator *tpm_emu = TPM_EMULATOR(obj); |
| 1067 | TPMBlobBuffers *state_blobs = &tpm_emu->state_blobs; |
| 1068 | |
| 1069 | tpm_emulator_shutdown(tpm_emu); |
| 1070 | |
| 1071 | object_unref(OBJECT(tpm_emu->data_ioc)); |
| 1072 | |
| 1073 | qemu_chr_fe_deinit(&tpm_emu->ctrl_chr, false); |
| 1074 | |
| 1075 | qapi_free_TPMEmulatorOptions(tpm_emu->options); |
| 1076 | |
| 1077 | migrate_del_blocker(&tpm_emu->migration_blocker); |
| 1078 | |
| 1079 | tpm_sized_buffer_reset(&state_blobs->volatil); |
| 1080 | tpm_sized_buffer_reset(&state_blobs->permanent); |
| 1081 | tpm_sized_buffer_reset(&state_blobs->savestate); |
| 1082 | |
| 1083 | qemu_mutex_destroy(&tpm_emu->mutex); |
| 1084 | qemu_del_vm_change_state_handler(tpm_emu->vmstate); |
| 1085 | |
| 1086 | vmstate_unregister(NULL, &vmstate_tpm_emulator, obj); |
| 1087 | } |
| 1088 | |
| 1089 | static void tpm_emulator_class_init(ObjectClass *klass, const void *data) |
| 1090 | { |
| 1091 | TPMBackendClass *tbc = TPM_BACKEND_CLASS(klass); |
| 1092 | |
| 1093 | tbc->type = TPM_TYPE_EMULATOR; |
| 1094 | tbc->opts = tpm_emulator_cmdline_opts; |
| 1095 | tbc->desc = "TPM emulator backend driver"; |
| 1096 | tbc->create = tpm_emulator_create; |
| 1097 | tbc->startup_tpm = tpm_emulator_startup_tpm; |
| 1098 | tbc->cancel_cmd = tpm_emulator_cancel_cmd; |
| 1099 | tbc->get_tpm_established_flag = tpm_emulator_get_tpm_established_flag; |
| 1100 | tbc->reset_tpm_established_flag = tpm_emulator_reset_tpm_established_flag; |
| 1101 | tbc->get_tpm_version = tpm_emulator_get_tpm_version; |
| 1102 | tbc->get_buffer_size = tpm_emulator_get_buffer_size; |
| 1103 | tbc->get_tpm_options = tpm_emulator_get_tpm_options; |
| 1104 | |
| 1105 | tbc->handle_request = tpm_emulator_handle_request; |
| 1106 | } |
| 1107 | |
| 1108 | static const TypeInfo tpm_emulator_info = { |
| 1109 | .name = TYPE_TPM_EMULATOR, |
| 1110 | .parent = TYPE_TPM_BACKEND, |
| 1111 | .instance_size = sizeof(TPMEmulator), |
| 1112 | .class_init = tpm_emulator_class_init, |
| 1113 | .instance_init = tpm_emulator_inst_init, |
| 1114 | .instance_finalize = tpm_emulator_inst_finalize, |
| 1115 | }; |
| 1116 | |
| 1117 | static void tpm_emulator_register(void) |
| 1118 | { |
| 1119 | type_register_static(&tpm_emulator_info); |
| 1120 | } |
| 1121 | |
| 1122 | type_init(tpm_emulator_register) |