1 // SPDX-License-Identifier: BSD-2-Clause 2 /* 3 * Copyright (c) 2014, STMicroelectronics International N.V. 4 * Copyright (c) 2020-2022 Linaro Limited 5 */ 6 7 #include <compiler.h> 8 #include <kernel/chip_services.h> 9 #include <kernel/pseudo_ta.h> 10 #include <kernel/tee_common.h> 11 #include <kernel/tee_common_otp.h> 12 #include <kernel/tee_ta_manager.h> 13 #include <kernel/tee_time.h> 14 #include <kernel/trace_ta.h> 15 #include <kernel/user_access.h> 16 #include <memtag.h> 17 #include <mm/core_memprot.h> 18 #include <mm/mobj.h> 19 #include <mm/tee_mm.h> 20 #include <mm/vm.h> 21 #include <stdlib_ext.h> 22 #include <tee_api_types.h> 23 #include <tee/tee_cryp_utl.h> 24 #include <tee/tee_svc.h> 25 #include <trace.h> 26 #include <user_ta_header.h> 27 #include <utee_types.h> 28 #include <util.h> 29 30 vaddr_t tee_svc_uref_base; 31 32 void syscall_log(const void *buf, size_t len) 33 { 34 if (IS_ENABLED(CFG_TEE_CORE_TA_TRACE)) { 35 char *kbuf = NULL; 36 size_t sz = 0; 37 38 if (!len || ADD_OVERFLOW(len, 1, &sz)) 39 return; 40 41 kbuf = malloc(sz); 42 if (!kbuf) 43 return; 44 45 if (copy_from_user(kbuf, buf, len) == TEE_SUCCESS) { 46 kbuf[len] = '\0'; 47 trace_ext_puts(kbuf); 48 } 49 50 free_wipe(kbuf); 51 } 52 } 53 54 TEE_Result syscall_not_supported(void) 55 { 56 return TEE_ERROR_NOT_SUPPORTED; 57 } 58 59 /* Configuration properties */ 60 /* API implementation version */ 61 static const char api_vers[] = TO_STR(CFG_TEE_API_VERSION); 62 63 /* Implementation description (implementation-dependent) */ 64 static const char descr[] = TO_STR(CFG_TEE_IMPL_DESCR); 65 66 /* 67 * TA persistent time protection level 68 * 100: Persistent time based on an REE-controlled real-time clock 69 * and on the TEE Trusted Storage for the storage of origins (default). 70 * 1000: Persistent time based on a TEE-controlled real-time clock 71 * and the TEE Trusted Storage. 72 * The real-time clock MUST be out of reach of software attacks 73 * from the REE. 74 */ 75 static const uint32_t ta_time_prot_lvl = 100; 76 77 /* Elliptic Curve Cryptographic support */ 78 #ifdef CFG_CRYPTO_ECC 79 static const bool crypto_ecc_en = 1; 80 #else 81 static const bool crypto_ecc_en; 82 #endif 83 84 /* 85 * Trusted storage anti rollback protection level 86 * 100: Antirollback enforced at REE level 87 * 1000: Antirollback TEE-controlled hardware 88 */ 89 #ifdef CFG_RPMB_FS 90 static const uint32_t ts_antiroll_prot_lvl = 1000; 91 #else 92 static const uint32_t ts_antiroll_prot_lvl = 100; 93 #endif 94 95 /* Trusted OS implementation version */ 96 static const char trustedos_impl_version[] = TO_STR(TEE_IMPL_VERSION); 97 98 /* Trusted OS implementation version (binary value) */ 99 static const uint32_t trustedos_impl_bin_version; /* 0 by default */ 100 101 /* Trusted OS implementation manufacturer name */ 102 static const char trustedos_manufacturer[] = TO_STR(CFG_TEE_MANUFACTURER); 103 104 /* Trusted firmware version */ 105 static const char fw_impl_version[] = TO_STR(CFG_TEE_FW_IMPL_VERSION); 106 107 /* Trusted firmware version (binary value) */ 108 static const uint32_t fw_impl_bin_version; /* 0 by default */ 109 110 /* Trusted firmware manufacturer name */ 111 static const char fw_manufacturer[] = TO_STR(CFG_TEE_FW_MANUFACTURER); 112 113 static TEE_Result get_prop_tee_dev_id(struct ts_session *sess __unused, 114 void *buf, size_t *blen) 115 { 116 TEE_Result res; 117 TEE_UUID uuid; 118 const size_t nslen = 5; 119 uint8_t data[5 + FVR_DIE_ID_NUM_REGS * sizeof(uint32_t)] = { 120 'O', 'P', 'T', 'E', 'E' }; 121 122 if (*blen < sizeof(uuid)) { 123 *blen = sizeof(uuid); 124 return TEE_ERROR_SHORT_BUFFER; 125 } 126 *blen = sizeof(uuid); 127 128 if (tee_otp_get_die_id(data + nslen, sizeof(data) - nslen)) 129 return TEE_ERROR_BAD_STATE; 130 131 res = tee_hash_createdigest(TEE_ALG_SHA256, data, sizeof(data), 132 (uint8_t *)&uuid, sizeof(uuid)); 133 if (res != TEE_SUCCESS) 134 return TEE_ERROR_BAD_STATE; 135 136 /* 137 * Changes the random value into and UUID as specifiec 138 * in RFC 4122. The magic values are from the example 139 * code in the RFC. 140 * 141 * TEE_UUID is defined slightly different from the RFC, 142 * but close enough for our purpose. 143 */ 144 145 uuid.timeHiAndVersion &= 0x0fff; 146 uuid.timeHiAndVersion |= 5 << 12; 147 148 /* uuid.clock_seq_hi_and_reserved in the RFC */ 149 uuid.clockSeqAndNode[0] &= 0x3f; 150 uuid.clockSeqAndNode[0] |= 0x80; 151 152 return copy_to_user(buf, &uuid, sizeof(TEE_UUID)); 153 } 154 155 static TEE_Result 156 get_prop_tee_sys_time_prot_level(struct ts_session *sess __unused, 157 void *buf, size_t *blen) 158 { 159 uint32_t prot; 160 161 if (*blen < sizeof(prot)) { 162 *blen = sizeof(prot); 163 return TEE_ERROR_SHORT_BUFFER; 164 } 165 *blen = sizeof(prot); 166 prot = tee_time_get_sys_time_protection_level(); 167 return copy_to_user(buf, &prot, sizeof(prot)); 168 } 169 170 static TEE_Result get_prop_client_id(struct ts_session *sess, 171 void *buf, size_t *blen) 172 { 173 if (*blen < sizeof(TEE_Identity)) { 174 *blen = sizeof(TEE_Identity); 175 return TEE_ERROR_SHORT_BUFFER; 176 } 177 *blen = sizeof(TEE_Identity); 178 return copy_to_user(buf, &to_ta_session(sess)->clnt_id, 179 sizeof(TEE_Identity)); 180 } 181 182 static TEE_Result get_prop_client_endian(struct ts_session *sess __unused, 183 void *buf, size_t *blen) 184 { 185 const uint32_t endian = 0; /* assume little-endian */ 186 187 if (*blen < sizeof(endian)) { 188 *blen = sizeof(endian); 189 return TEE_ERROR_SHORT_BUFFER; 190 } 191 *blen = sizeof(endian); 192 return copy_to_user(buf, &endian, sizeof(endian)); 193 } 194 195 static TEE_Result get_prop_ta_app_id(struct ts_session *sess, 196 void *buf, size_t *blen) 197 { 198 if (*blen < sizeof(TEE_UUID)) { 199 *blen = sizeof(TEE_UUID); 200 return TEE_ERROR_SHORT_BUFFER; 201 } 202 *blen = sizeof(TEE_UUID); 203 return copy_to_user(buf, &sess->ctx->uuid, sizeof(TEE_UUID)); 204 } 205 206 #ifdef CFG_TA_BTI 207 static TEE_Result 208 get_prop_feat_bti_implemented(struct ts_session *sess __unused, void *buf, 209 size_t *blen) 210 { 211 bool bti_impl = false; 212 213 if (*blen < sizeof(bti_impl)) { 214 *blen = sizeof(bti_impl); 215 return TEE_ERROR_SHORT_BUFFER; 216 } 217 *blen = sizeof(bti_impl); 218 bti_impl = feat_bti_is_implemented(); 219 220 return copy_to_user(buf, &bti_impl, sizeof(bti_impl)); 221 } 222 #endif 223 224 #ifdef CFG_TA_PAUTH 225 static TEE_Result 226 get_prop_feat_pauth_implemented(struct ts_session *sess __unused, void *buf, 227 size_t *blen) 228 { 229 bool pauth_impl = false; 230 231 if (*blen < sizeof(pauth_impl)) { 232 *blen = sizeof(pauth_impl); 233 return TEE_ERROR_SHORT_BUFFER; 234 } 235 *blen = sizeof(pauth_impl); 236 pauth_impl = feat_pauth_is_implemented(); 237 238 return copy_to_user(buf, &pauth_impl, sizeof(pauth_impl)); 239 } 240 #endif 241 242 #if MEMTAG_IS_ENABLED 243 static TEE_Result 244 get_prop_feat_memtag_implemented(struct ts_session *sess __unused, void *buf, 245 size_t *blen) 246 { 247 uint32_t v = 0; 248 249 if (*blen < sizeof(v)) { 250 *blen = sizeof(v); 251 return TEE_ERROR_SHORT_BUFFER; 252 } 253 *blen = sizeof(v); 254 if (memtag_is_enabled()) 255 v = feat_mte_implemented(); 256 257 return copy_to_user(buf, &v, sizeof(v)); 258 } 259 #endif 260 261 /* Properties of the set TEE_PROPSET_CURRENT_CLIENT */ 262 const struct tee_props tee_propset_client[] = { 263 { 264 .name = "gpd.client.identity", 265 .prop_type = USER_TA_PROP_TYPE_IDENTITY, 266 .get_prop_func = get_prop_client_id 267 }, 268 { 269 .name = "gpd.client.endian", 270 .prop_type = USER_TA_PROP_TYPE_U32, 271 .get_prop_func = get_prop_client_endian 272 }, 273 }; 274 275 /* Properties of the set TEE_PROPSET_CURRENT_TA */ 276 const struct tee_props tee_propset_ta[] = { 277 { 278 .name = "gpd.ta.appID", 279 .prop_type = USER_TA_PROP_TYPE_UUID, 280 .get_prop_func = get_prop_ta_app_id 281 }, 282 283 /* 284 * Following properties are processed directly in libutee: 285 * TA_PROP_STR_SINGLE_INSTANCE 286 * TA_PROP_STR_MULTI_SESSION 287 * TA_PROP_STR_KEEP_ALIVE 288 * TA_PROP_STR_DATA_SIZE 289 * TA_PROP_STR_STACK_SIZE 290 * TA_PROP_STR_VERSION 291 * TA_PROP_STR_DESCRIPTION 292 * USER_TA_PROP_TYPE_STRING, 293 * TA_DESCRIPTION 294 */ 295 }; 296 297 /* Properties of the set TEE_PROPSET_TEE_IMPLEMENTATION */ 298 const struct tee_props tee_propset_tee[] = { 299 { 300 .name = "gpd.tee.apiversion", 301 .prop_type = USER_TA_PROP_TYPE_STRING, 302 .data = api_vers, 303 .len = sizeof(api_vers), 304 }, 305 { 306 .name = "gpd.tee.description", 307 .prop_type = USER_TA_PROP_TYPE_STRING, 308 .data = descr, .len = sizeof(descr) 309 }, 310 { 311 .name = "gpd.tee.deviceID", 312 .prop_type = USER_TA_PROP_TYPE_UUID, 313 .get_prop_func = get_prop_tee_dev_id 314 }, 315 { 316 .name = "gpd.tee.systemTime.protectionLevel", 317 .prop_type = USER_TA_PROP_TYPE_U32, 318 .get_prop_func = get_prop_tee_sys_time_prot_level 319 }, 320 { 321 .name = "gpd.tee.TAPersistentTime.protectionLevel", 322 .prop_type = USER_TA_PROP_TYPE_U32, 323 .data = &ta_time_prot_lvl, 324 .len = sizeof(ta_time_prot_lvl) 325 }, 326 { 327 .name = "gpd.tee.cryptography.ecc", 328 .prop_type = USER_TA_PROP_TYPE_BOOL, 329 .data = &crypto_ecc_en, 330 .len = sizeof(crypto_ecc_en) 331 }, 332 { 333 .name = "gpd.tee.trustedStorage.antiRollback.protectionLevel", 334 .prop_type = USER_TA_PROP_TYPE_U32, 335 .data = &ts_antiroll_prot_lvl, 336 .len = sizeof(ts_antiroll_prot_lvl) 337 }, 338 { 339 .name = "gpd.tee.trustedos.implementation.version", 340 .prop_type = USER_TA_PROP_TYPE_STRING, 341 .data = trustedos_impl_version, 342 .len = sizeof(trustedos_impl_version) 343 }, 344 { 345 .name = "gpd.tee.trustedos.implementation.binaryversion", 346 .prop_type = USER_TA_PROP_TYPE_U32, 347 .data = &trustedos_impl_bin_version, 348 .len = sizeof(trustedos_impl_bin_version) 349 }, 350 { 351 .name = "gpd.tee.trustedos.manufacturer", 352 .prop_type = USER_TA_PROP_TYPE_STRING, 353 .data = trustedos_manufacturer, 354 .len = sizeof(trustedos_manufacturer) 355 }, 356 { 357 .name = "gpd.tee.firmware.implementation.version", 358 .prop_type = USER_TA_PROP_TYPE_STRING, 359 .data = fw_impl_version, 360 .len = sizeof(fw_impl_version) 361 }, 362 { 363 .name = "gpd.tee.firmware.implementation.binaryversion", 364 .prop_type = USER_TA_PROP_TYPE_U32, 365 .data = &fw_impl_bin_version, 366 .len = sizeof(fw_impl_bin_version) 367 }, 368 { 369 .name = "gpd.tee.firmware.manufacturer", 370 .prop_type = USER_TA_PROP_TYPE_STRING, 371 .data = fw_manufacturer, 372 .len = sizeof(fw_manufacturer) 373 }, 374 #ifdef CFG_TA_BTI 375 { 376 .name = "org.trustedfirmware.optee.cpu.feat_bti_implemented", 377 .prop_type = USER_TA_PROP_TYPE_BOOL, 378 .get_prop_func = get_prop_feat_bti_implemented 379 }, 380 #endif 381 #ifdef CFG_TA_PAUTH 382 { 383 .name = "org.trustedfirmware.optee.cpu.feat_pauth_implemented", 384 .prop_type = USER_TA_PROP_TYPE_BOOL, 385 .get_prop_func = get_prop_feat_pauth_implemented 386 }, 387 #endif 388 #if MEMTAG_IS_ENABLED 389 { 390 .name = "org.trustedfirmware.optee.cpu.feat_memtag_implemented", 391 .prop_type = USER_TA_PROP_TYPE_U32, 392 .get_prop_func = get_prop_feat_memtag_implemented 393 } 394 #endif 395 396 /* 397 * Following properties are processed directly in libutee: 398 * gpd.tee.arith.maxBigIntSize 399 */ 400 }; 401 402 __weak const struct tee_vendor_props vendor_props_client; 403 __weak const struct tee_vendor_props vendor_props_ta; 404 __weak const struct tee_vendor_props vendor_props_tee; 405 406 static void get_prop_set(unsigned long prop_set, 407 const struct tee_props **props, 408 size_t *size, 409 const struct tee_props **vendor_props, 410 size_t *vendor_size) 411 { 412 if ((TEE_PropSetHandle)prop_set == TEE_PROPSET_CURRENT_CLIENT) { 413 *props = tee_propset_client; 414 *size = ARRAY_SIZE(tee_propset_client); 415 *vendor_props = vendor_props_client.props; 416 *vendor_size = vendor_props_client.len; 417 } else if ((TEE_PropSetHandle)prop_set == TEE_PROPSET_CURRENT_TA) { 418 *props = tee_propset_ta; 419 *size = ARRAY_SIZE(tee_propset_ta); 420 *vendor_props = vendor_props_ta.props; 421 *vendor_size = vendor_props_ta.len; 422 } else if ((TEE_PropSetHandle)prop_set == 423 TEE_PROPSET_TEE_IMPLEMENTATION) { 424 *props = tee_propset_tee; 425 *size = ARRAY_SIZE(tee_propset_tee); 426 *vendor_props = vendor_props_tee.props; 427 *vendor_size = vendor_props_tee.len; 428 } else { 429 *props = NULL; 430 *size = 0; 431 *vendor_props = NULL; 432 *vendor_size = 0; 433 } 434 } 435 436 static const struct tee_props *get_prop_struct(unsigned long prop_set, 437 unsigned long index) 438 { 439 const struct tee_props *props; 440 const struct tee_props *vendor_props; 441 size_t size; 442 size_t vendor_size; 443 444 get_prop_set(prop_set, &props, &size, &vendor_props, &vendor_size); 445 446 if (index < size) 447 return &(props[index]); 448 index -= size; 449 450 if (index < vendor_size) 451 return &(vendor_props[index]); 452 453 return NULL; 454 } 455 456 /* 457 * prop_set is part of TEE_PROPSET_xxx 458 * index is the index in the Property Set to retrieve 459 * if name is not NULL, the name of "index" property is returned 460 * if buf is not NULL, the property is returned 461 */ 462 TEE_Result syscall_get_property(unsigned long prop_set, 463 unsigned long index, 464 void *name, uint32_t *name_len, 465 void *buf, uint32_t *blen, 466 uint32_t *prop_type) 467 { 468 struct ts_session *sess = ts_get_current_session(); 469 TEE_Result res = TEE_SUCCESS; 470 TEE_Result res2 = TEE_SUCCESS; 471 const struct tee_props *prop = NULL; 472 uint32_t klen = 0; 473 size_t klen_size = 0; 474 uint32_t elen = 0; 475 476 prop = get_prop_struct(prop_set, index); 477 if (!prop) 478 return TEE_ERROR_ITEM_NOT_FOUND; 479 480 /* Get the property type */ 481 if (prop_type) { 482 res = copy_to_user(prop_type, &prop->prop_type, 483 sizeof(*prop_type)); 484 if (res != TEE_SUCCESS) 485 return res; 486 } 487 488 /* Get the property */ 489 if (buf && blen) { 490 res = copy_from_user(&klen, blen, sizeof(klen)); 491 if (res != TEE_SUCCESS) 492 return res; 493 494 if (prop->get_prop_func) { 495 klen_size = klen; 496 res = prop->get_prop_func(sess, buf, &klen_size); 497 klen = klen_size; 498 res2 = copy_to_user(blen, &klen, sizeof(*blen)); 499 } else { 500 if (klen < prop->len) 501 res = TEE_ERROR_SHORT_BUFFER; 502 else 503 res = copy_to_user(buf, prop->data, prop->len); 504 res2 = copy_to_user(blen, &prop->len, sizeof(*blen)); 505 } 506 if (res2 != TEE_SUCCESS) 507 return res2; 508 if (res != TEE_SUCCESS) 509 return res; 510 } 511 512 /* Get the property name */ 513 if (name && name_len) { 514 res = copy_from_user(&klen, name_len, sizeof(klen)); 515 if (res != TEE_SUCCESS) 516 return res; 517 518 elen = strlen(prop->name) + 1; 519 520 if (klen < elen) 521 res = TEE_ERROR_SHORT_BUFFER; 522 else 523 res = copy_to_user(name, prop->name, elen); 524 res2 = copy_to_user(name_len, &elen, sizeof(*name_len)); 525 if (res2 != TEE_SUCCESS) 526 return res2; 527 if (res != TEE_SUCCESS) 528 return res; 529 } 530 531 return res; 532 } 533 534 /* 535 * prop_set is part of TEE_PROPSET_xxx 536 */ 537 TEE_Result syscall_get_property_name_to_index(unsigned long prop_set, 538 void *name, 539 unsigned long name_len, 540 uint32_t *index) 541 { 542 TEE_Result res = TEE_SUCCESS; 543 const struct tee_props *props = NULL; 544 size_t size = 0; 545 const struct tee_props *vendor_props = NULL; 546 size_t vendor_size = 0; 547 char *kname = NULL; 548 uint32_t i = 0; 549 550 get_prop_set(prop_set, &props, &size, &vendor_props, &vendor_size); 551 if (!props) 552 return TEE_ERROR_ITEM_NOT_FOUND; 553 554 if (!name || !name_len) { 555 res = TEE_ERROR_BAD_PARAMETERS; 556 goto out; 557 } 558 559 kname = malloc(name_len); 560 if (!kname) 561 return TEE_ERROR_OUT_OF_MEMORY; 562 res = copy_from_user(kname, name, name_len); 563 if (res != TEE_SUCCESS) 564 goto out; 565 kname[name_len - 1] = 0; 566 567 res = TEE_ERROR_ITEM_NOT_FOUND; 568 for (i = 0; i < size; i++) { 569 if (!strcmp(kname, props[i].name)) { 570 res = copy_to_user(index, &i, sizeof(*index)); 571 goto out; 572 } 573 } 574 for (i = size; i < size + vendor_size; i++) { 575 if (!strcmp(kname, vendor_props[i - size].name)) { 576 res = copy_to_user(index, &i, sizeof(*index)); 577 goto out; 578 } 579 } 580 581 out: 582 free_wipe(kname); 583 return res; 584 } 585 586 static TEE_Result utee_param_to_param(struct user_ta_ctx *utc, 587 struct tee_ta_param *p, 588 struct utee_params *up) 589 { 590 TEE_Result res = TEE_SUCCESS; 591 size_t n = 0; 592 uint64_t types = 0; 593 struct utee_params *up_bbuf = NULL; 594 595 res = BB_MEMDUP_USER(up, sizeof(*up), &up_bbuf); 596 if (res) 597 goto out; 598 599 types = up_bbuf->types; 600 601 p->types = types; 602 for (n = 0; n < TEE_NUM_PARAMS; n++) { 603 uintptr_t a = up_bbuf->vals[n * 2]; 604 size_t b = up_bbuf->vals[n * 2 + 1]; 605 uint32_t flags = TEE_MEMORY_ACCESS_READ | 606 TEE_MEMORY_ACCESS_ANY_OWNER; 607 608 switch (TEE_PARAM_TYPE_GET(types, n)) { 609 case TEE_PARAM_TYPE_MEMREF_OUTPUT: 610 case TEE_PARAM_TYPE_MEMREF_INOUT: 611 flags |= TEE_MEMORY_ACCESS_WRITE; 612 fallthrough; 613 case TEE_PARAM_TYPE_MEMREF_INPUT: 614 p->u[n].mem.offs = memtag_strip_tag_vaddr((void *)a); 615 p->u[n].mem.size = b; 616 617 if (!p->u[n].mem.offs) { 618 /* Allow NULL memrefs if of size 0 */ 619 if (p->u[n].mem.size) { 620 res = TEE_ERROR_BAD_PARAMETERS; 621 goto out; 622 } 623 p->u[n].mem.mobj = NULL; 624 break; 625 } 626 627 p->u[n].mem.mobj = &mobj_virt; 628 629 res = vm_check_access_rights(&utc->uctx, flags, a, b); 630 if (res) 631 goto out; 632 break; 633 case TEE_PARAM_TYPE_VALUE_INPUT: 634 case TEE_PARAM_TYPE_VALUE_INOUT: 635 p->u[n].val.a = a; 636 p->u[n].val.b = b; 637 break; 638 default: 639 memset(&p->u[n], 0, sizeof(p->u[n])); 640 break; 641 } 642 } 643 644 out: 645 bb_free(up_bbuf, sizeof(struct utee_params)); 646 return res; 647 } 648 649 /* 650 * TA invokes some TA with parameter. 651 * If some parameters are memory references: 652 * - either the memref is inside TA private RAM: TA is not allowed to expose 653 * its private RAM: use a temporary memory buffer and copy the data. 654 * - or the memref is not in the TA private RAM: 655 * - if the memref was mapped to the TA, TA is allowed to expose it. 656 * - if so, converts memref virtual address into a physical address. 657 */ 658 static TEE_Result tee_svc_copy_param(struct ts_session *sess, 659 struct ts_session *called_sess, 660 struct utee_params *callee_params, 661 struct tee_ta_param *param) 662 { 663 struct user_ta_ctx *utc = to_user_ta_ctx(sess->ctx); 664 TEE_Result res = TEE_SUCCESS; 665 void *va = NULL; 666 size_t n = 0; 667 size_t s = 0; 668 669 callee_params = memtag_strip_tag(callee_params); 670 671 /* fill 'param' input struct with caller params description buffer */ 672 if (!callee_params) { 673 memset(param, 0, sizeof(*param)); 674 } else { 675 uint32_t flags = TEE_MEMORY_ACCESS_READ | 676 TEE_MEMORY_ACCESS_WRITE | 677 TEE_MEMORY_ACCESS_ANY_OWNER; 678 679 res = vm_check_access_rights(&utc->uctx, flags, 680 (uaddr_t)callee_params, 681 sizeof(struct utee_params)); 682 if (res != TEE_SUCCESS) 683 return res; 684 res = utee_param_to_param(utc, param, callee_params); 685 if (res != TEE_SUCCESS) 686 return res; 687 } 688 689 if (called_sess && is_pseudo_ta_ctx(called_sess->ctx)) { 690 /* pseudo TA borrows the mapping of the calling TA */ 691 return TEE_SUCCESS; 692 } 693 694 /* All mobj in param are of type MOJB_TYPE_VIRT */ 695 696 for (n = 0; n < TEE_NUM_PARAMS; n++) { 697 switch (TEE_PARAM_TYPE_GET(param->types, n)) { 698 case TEE_PARAM_TYPE_MEMREF_INPUT: 699 case TEE_PARAM_TYPE_MEMREF_OUTPUT: 700 case TEE_PARAM_TYPE_MEMREF_INOUT: 701 va = (void *)param->u[n].mem.offs; 702 s = param->u[n].mem.size; 703 if (!va) { 704 if (s) 705 return TEE_ERROR_BAD_PARAMETERS; 706 break; 707 } 708 /* uTA cannot expose its private memory */ 709 if (vm_buf_is_inside_um_private(&utc->uctx, va, s)) 710 return TEE_ERROR_BAD_PARAMETERS; 711 712 res = vm_buf_to_mboj_offs(&utc->uctx, va, s, 713 ¶m->u[n].mem.mobj, 714 ¶m->u[n].mem.offs); 715 if (res != TEE_SUCCESS) 716 return res; 717 break; 718 default: 719 break; 720 } 721 } 722 723 return TEE_SUCCESS; 724 } 725 726 /* 727 * Back from execution of service: update parameters passed from TA: 728 * If some parameters were memory references: 729 * - either the memref was temporary: copy back data and update size 730 * - or it was the original TA memref: update only the size value. 731 */ 732 static TEE_Result tee_svc_update_out_param( 733 struct tee_ta_param *param, 734 struct utee_params *usr_param) 735 { 736 size_t n = 0; 737 uint64_t *vals = usr_param->vals; 738 uint64_t sz = 0; 739 740 for (n = 0; n < TEE_NUM_PARAMS; n++) { 741 TEE_Result res = TEE_SUCCESS; 742 uint64_t val_buf[2] = { }; 743 744 switch (TEE_PARAM_TYPE_GET(param->types, n)) { 745 case TEE_PARAM_TYPE_MEMREF_OUTPUT: 746 case TEE_PARAM_TYPE_MEMREF_INOUT: 747 sz = param->u[n].mem.size; 748 749 res = PUT_USER_SCALAR(sz, &usr_param->vals[n * 2 + 1]); 750 if (res) 751 return res; 752 753 break; 754 755 case TEE_PARAM_TYPE_VALUE_OUTPUT: 756 case TEE_PARAM_TYPE_VALUE_INOUT: 757 val_buf[0] = param->u[n].val.a; 758 val_buf[1] = param->u[n].val.b; 759 760 res = copy_to_user(&vals[n * 2], val_buf, 761 2 * sizeof(uint64_t)); 762 if (res) 763 return res; 764 765 break; 766 767 default: 768 continue; 769 } 770 } 771 772 return TEE_SUCCESS; 773 } 774 775 /* Called when a TA calls an OpenSession on another TA */ 776 TEE_Result syscall_open_ta_session(const TEE_UUID *dest, 777 unsigned long cancel_req_to, 778 struct utee_params *usr_param, uint32_t *ta_sess, 779 uint32_t *ret_orig) 780 { 781 struct ts_session *sess = ts_get_current_session(); 782 struct user_ta_ctx *utc = to_user_ta_ctx(sess->ctx); 783 TEE_Result res = TEE_SUCCESS; 784 uint32_t ret_o = TEE_ORIGIN_TEE; 785 struct tee_ta_session *s = NULL; 786 TEE_UUID *uuid = malloc(sizeof(TEE_UUID)); 787 struct tee_ta_param *param = malloc(sizeof(struct tee_ta_param)); 788 TEE_Identity *clnt_id = malloc(sizeof(TEE_Identity)); 789 790 if (uuid == NULL || param == NULL || clnt_id == NULL) { 791 res = TEE_ERROR_OUT_OF_MEMORY; 792 goto out_free_only; 793 } 794 795 memset(param, 0, sizeof(struct tee_ta_param)); 796 797 res = copy_from_user_private(uuid, dest, sizeof(TEE_UUID)); 798 if (res != TEE_SUCCESS) 799 goto function_exit; 800 801 clnt_id->login = TEE_LOGIN_TRUSTED_APP; 802 memcpy(&clnt_id->uuid, &sess->ctx->uuid, sizeof(TEE_UUID)); 803 804 res = tee_svc_copy_param(sess, NULL, usr_param, param); 805 if (res != TEE_SUCCESS) 806 goto function_exit; 807 808 res = tee_ta_open_session(&ret_o, &s, &utc->open_sessions, uuid, 809 clnt_id, cancel_req_to, param); 810 vm_set_ctx(&utc->ta_ctx.ts_ctx); 811 if (res != TEE_SUCCESS) 812 goto function_exit; 813 814 res = tee_svc_update_out_param(param, usr_param); 815 816 function_exit: 817 if (res == TEE_SUCCESS) 818 copy_to_user_private(ta_sess, &s->id, sizeof(s->id)); 819 copy_to_user_private(ret_orig, &ret_o, sizeof(ret_o)); 820 821 out_free_only: 822 free_wipe(param); 823 free_wipe(uuid); 824 free_wipe(clnt_id); 825 return res; 826 } 827 828 TEE_Result syscall_close_ta_session(unsigned long ta_sess) 829 { 830 struct ts_session *sess = ts_get_current_session(); 831 struct user_ta_ctx *utc = to_user_ta_ctx(sess->ctx); 832 TEE_Identity clnt_id = { }; 833 struct tee_ta_session *s = NULL; 834 835 s = tee_ta_find_session(ta_sess, &utc->open_sessions); 836 837 clnt_id.login = TEE_LOGIN_TRUSTED_APP; 838 memcpy(&clnt_id.uuid, &sess->ctx->uuid, sizeof(TEE_UUID)); 839 840 return tee_ta_close_session(s, &utc->open_sessions, &clnt_id); 841 } 842 843 TEE_Result syscall_invoke_ta_command(unsigned long ta_sess, 844 unsigned long cancel_req_to, unsigned long cmd_id, 845 struct utee_params *usr_param, uint32_t *ret_orig) 846 { 847 struct ts_session *sess = ts_get_current_session(); 848 struct user_ta_ctx *utc = to_user_ta_ctx(sess->ctx); 849 TEE_Result res = TEE_SUCCESS; 850 TEE_Result res2 = TEE_SUCCESS; 851 uint32_t ret_o = TEE_ORIGIN_TEE; 852 struct tee_ta_param param = { 0 }; 853 TEE_Identity clnt_id = { }; 854 struct tee_ta_session *called_sess = NULL; 855 856 called_sess = tee_ta_get_session((uint32_t)ta_sess, true, 857 &utc->open_sessions); 858 if (!called_sess) 859 return TEE_ERROR_BAD_PARAMETERS; 860 861 clnt_id.login = TEE_LOGIN_TRUSTED_APP; 862 memcpy(&clnt_id.uuid, &sess->ctx->uuid, sizeof(TEE_UUID)); 863 864 res = tee_svc_copy_param(sess, &called_sess->ts_sess, usr_param, 865 ¶m); 866 if (res != TEE_SUCCESS) 867 goto function_exit; 868 869 res = tee_ta_invoke_command(&ret_o, called_sess, &clnt_id, 870 cancel_req_to, cmd_id, ¶m); 871 if (res == TEE_ERROR_TARGET_DEAD) 872 goto function_exit; 873 874 res2 = tee_svc_update_out_param(¶m, usr_param); 875 if (res2 != TEE_SUCCESS) { 876 /* 877 * Spec for TEE_InvokeTACommand() says: 878 * "If the return origin is different from 879 * TEE_ORIGIN_TRUSTED_APP, then the function has failed 880 * before it could reach the destination Trusted 881 * Application." 882 * 883 * But if we can't update params to the caller we have no 884 * choice we need to return some error to indicate that 885 * parameters aren't updated as expected. 886 */ 887 ret_o = TEE_ORIGIN_TEE; 888 res = res2; 889 } 890 891 function_exit: 892 tee_ta_put_session(called_sess); 893 copy_to_user_private(ret_orig, &ret_o, sizeof(ret_o)); 894 return res; 895 } 896 897 TEE_Result syscall_check_access_rights(unsigned long flags, const void *buf, 898 size_t len) 899 { 900 struct ts_session *s = ts_get_current_session(); 901 902 return vm_check_access_rights(&to_user_ta_ctx(s->ctx)->uctx, flags, 903 memtag_strip_tag_vaddr(buf), len); 904 } 905 906 TEE_Result syscall_get_cancellation_flag(uint32_t *cancel) 907 { 908 struct ts_session *s = ts_get_current_session(); 909 uint32_t c = 0; 910 911 c = tee_ta_session_is_cancelled(to_ta_session(s), NULL); 912 913 return copy_to_user(cancel, &c, sizeof(c)); 914 } 915 916 TEE_Result syscall_unmask_cancellation(uint32_t *old_mask) 917 { 918 struct ts_session *s = ts_get_current_session(); 919 struct tee_ta_session *sess = NULL; 920 uint32_t m = 0; 921 922 sess = to_ta_session(s); 923 m = sess->cancel_mask; 924 sess->cancel_mask = false; 925 return copy_to_user(old_mask, &m, sizeof(m)); 926 } 927 928 TEE_Result syscall_mask_cancellation(uint32_t *old_mask) 929 { 930 struct ts_session *s = ts_get_current_session(); 931 struct tee_ta_session *sess = NULL; 932 uint32_t m = 0; 933 934 sess = to_ta_session(s); 935 m = sess->cancel_mask; 936 sess->cancel_mask = true; 937 return copy_to_user(old_mask, &m, sizeof(m)); 938 } 939 940 TEE_Result syscall_wait(unsigned long timeout) 941 { 942 struct ts_session *s = ts_get_current_session(); 943 TEE_Result res = TEE_SUCCESS; 944 uint32_t mytime = 0; 945 TEE_Time base_time = { }; 946 TEE_Time current_time = { }; 947 948 res = tee_time_get_sys_time(&base_time); 949 if (res != TEE_SUCCESS) 950 return res; 951 952 while (true) { 953 res = tee_time_get_sys_time(¤t_time); 954 if (res != TEE_SUCCESS) 955 return res; 956 957 if (tee_ta_session_is_cancelled(to_ta_session(s), 958 ¤t_time)) 959 return TEE_ERROR_CANCEL; 960 961 mytime = (current_time.seconds - base_time.seconds) * 1000 + 962 (int)current_time.millis - (int)base_time.millis; 963 if (mytime >= timeout) 964 return TEE_SUCCESS; 965 966 tee_time_wait(timeout - mytime); 967 } 968 969 return res; 970 } 971 972 TEE_Result syscall_get_time(unsigned long cat, TEE_Time *mytime) 973 { 974 struct ts_session *s = ts_get_current_session(); 975 TEE_Result res = TEE_SUCCESS; 976 TEE_Result res2 = TEE_SUCCESS; 977 TEE_Time t = { }; 978 979 switch (cat) { 980 case UTEE_TIME_CAT_SYSTEM: 981 res = tee_time_get_sys_time(&t); 982 break; 983 case UTEE_TIME_CAT_TA_PERSISTENT: 984 res = tee_time_get_ta_time((const void *)&s->ctx->uuid, &t); 985 break; 986 case UTEE_TIME_CAT_REE: 987 res = tee_time_get_ree_time(&t); 988 break; 989 default: 990 res = TEE_ERROR_BAD_PARAMETERS; 991 break; 992 } 993 994 if (res == TEE_SUCCESS || res == TEE_ERROR_OVERFLOW) { 995 res2 = copy_to_user_private(mytime, &t, sizeof(t)); 996 if (res2 != TEE_SUCCESS) 997 res = res2; 998 } 999 1000 return res; 1001 } 1002 1003 TEE_Result syscall_set_ta_time(const TEE_Time *mytime) 1004 { 1005 struct ts_session *s = ts_get_current_session(); 1006 TEE_Result res = TEE_SUCCESS; 1007 TEE_Time t = { }; 1008 1009 res = copy_from_user_private(&t, mytime, sizeof(t)); 1010 if (res != TEE_SUCCESS) 1011 return res; 1012 1013 return tee_time_set_ta_time((const void *)&s->ctx->uuid, &t); 1014 } 1015