1 // SPDX-License-Identifier: BSD-2-Clause 2 /* 3 * Copyright (c) 2014, STMicroelectronics International N.V. 4 */ 5 #include <util.h> 6 #include <kernel/tee_common_otp.h> 7 #include <kernel/tee_common.h> 8 #include <tee_api_types.h> 9 #include <kernel/tee_ta_manager.h> 10 #include <utee_types.h> 11 #include <tee/tee_svc.h> 12 #include <tee/tee_cryp_utl.h> 13 #include <mm/tee_mmu.h> 14 #include <mm/tee_mm.h> 15 #include <mm/core_memprot.h> 16 #include <kernel/tee_time.h> 17 18 #include <user_ta_header.h> 19 #include <trace.h> 20 #include <kernel/trace_ta.h> 21 #include <kernel/chip_services.h> 22 #include <kernel/pseudo_ta.h> 23 #include <mm/mobj.h> 24 25 vaddr_t tee_svc_uref_base; 26 27 void syscall_log(const void *buf __maybe_unused, size_t len __maybe_unused) 28 { 29 #ifdef CFG_TEE_CORE_TA_TRACE 30 char *kbuf; 31 32 if (len == 0) 33 return; 34 35 kbuf = malloc(len + 1); 36 if (kbuf == NULL) 37 return; 38 39 if (tee_svc_copy_from_user(kbuf, buf, len) == TEE_SUCCESS) { 40 kbuf[len] = '\0'; 41 trace_ext_puts(kbuf); 42 } 43 44 free(kbuf); 45 #endif 46 } 47 48 TEE_Result syscall_not_supported(void) 49 { 50 return TEE_ERROR_NOT_SUPPORTED; 51 } 52 53 /* Configuration properties */ 54 /* API implementation version */ 55 static const char api_vers[] = TO_STR(CFG_TEE_API_VERSION); 56 57 /* Implementation description (implementation-dependent) */ 58 static const char descr[] = TO_STR(CFG_TEE_IMPL_DESCR); 59 60 /* 61 * TA persistent time protection level 62 * 100: Persistent time based on an REE-controlled real-time clock 63 * and on the TEE Trusted Storage for the storage of origins (default). 64 * 1000: Persistent time based on a TEE-controlled real-time clock 65 * and the TEE Trusted Storage. 66 * The real-time clock MUST be out of reach of software attacks 67 * from the REE. 68 */ 69 static const uint32_t ta_time_prot_lvl = 100; 70 71 /* Elliptic Curve Cryptographic support */ 72 #ifdef CFG_CRYPTO_ECC 73 static const bool crypto_ecc_en = 1; 74 #else 75 static const bool crypto_ecc_en; 76 #endif 77 78 /* 79 * Trusted storage anti rollback protection level 80 * 0 (or missing): No antirollback protection (default) 81 * 100: Antirollback enforced at REE level 82 * 1000: Antirollback TEE-controlled hardware 83 */ 84 #ifdef CFG_RPMB_FS 85 static const uint32_t ts_antiroll_prot_lvl = 1000; 86 #else 87 static const uint32_t ts_antiroll_prot_lvl; 88 #endif 89 90 /* Trusted OS implementation version */ 91 static const char trustedos_impl_version[] = TO_STR(TEE_IMPL_VERSION); 92 93 /* Trusted OS implementation version (binary value) */ 94 static const uint32_t trustedos_impl_bin_version; /* 0 by default */ 95 96 /* Trusted OS implementation manufacturer name */ 97 static const char trustedos_manufacturer[] = TO_STR(CFG_TEE_MANUFACTURER); 98 99 /* Trusted firmware version */ 100 static const char fw_impl_version[] = TO_STR(CFG_TEE_FW_IMPL_VERSION); 101 102 /* Trusted firmware version (binary value) */ 103 static const uint32_t fw_impl_bin_version; /* 0 by default */ 104 105 /* Trusted firmware manufacturer name */ 106 static const char fw_manufacturer[] = TO_STR(CFG_TEE_FW_MANUFACTURER); 107 108 static TEE_Result get_prop_tee_dev_id(struct tee_ta_session *sess __unused, 109 void *buf, size_t *blen) 110 { 111 TEE_Result res; 112 TEE_UUID uuid; 113 const size_t nslen = 5; 114 uint8_t data[5 + FVR_DIE_ID_NUM_REGS * sizeof(uint32_t)] = { 115 'O', 'P', 'T', 'E', 'E' }; 116 117 if (*blen < sizeof(uuid)) { 118 *blen = sizeof(uuid); 119 return TEE_ERROR_SHORT_BUFFER; 120 } 121 *blen = sizeof(uuid); 122 123 if (tee_otp_get_die_id(data + nslen, sizeof(data) - nslen)) 124 return TEE_ERROR_BAD_STATE; 125 126 res = tee_hash_createdigest(TEE_ALG_SHA256, data, sizeof(data), 127 (uint8_t *)&uuid, sizeof(uuid)); 128 if (res != TEE_SUCCESS) 129 return TEE_ERROR_BAD_STATE; 130 131 /* 132 * Changes the random value into and UUID as specifiec 133 * in RFC 4122. The magic values are from the example 134 * code in the RFC. 135 * 136 * TEE_UUID is defined slightly different from the RFC, 137 * but close enough for our purpose. 138 */ 139 140 uuid.timeHiAndVersion &= 0x0fff; 141 uuid.timeHiAndVersion |= 5 << 12; 142 143 /* uuid.clock_seq_hi_and_reserved in the RFC */ 144 uuid.clockSeqAndNode[0] &= 0x3f; 145 uuid.clockSeqAndNode[0] |= 0x80; 146 147 return tee_svc_copy_to_user(buf, &uuid, sizeof(TEE_UUID)); 148 } 149 150 static TEE_Result get_prop_tee_sys_time_prot_level( 151 struct tee_ta_session *sess __unused, 152 void *buf, size_t *blen) 153 { 154 uint32_t prot; 155 156 if (*blen < sizeof(prot)) { 157 *blen = sizeof(prot); 158 return TEE_ERROR_SHORT_BUFFER; 159 } 160 *blen = sizeof(prot); 161 prot = tee_time_get_sys_time_protection_level(); 162 return tee_svc_copy_to_user(buf, &prot, sizeof(prot)); 163 } 164 165 static TEE_Result get_prop_client_id(struct tee_ta_session *sess __unused, 166 void *buf, size_t *blen) 167 { 168 if (*blen < sizeof(TEE_Identity)) { 169 *blen = sizeof(TEE_Identity); 170 return TEE_ERROR_SHORT_BUFFER; 171 } 172 *blen = sizeof(TEE_Identity); 173 return tee_svc_copy_to_user(buf, &sess->clnt_id, sizeof(TEE_Identity)); 174 } 175 176 static TEE_Result get_prop_ta_app_id(struct tee_ta_session *sess, 177 void *buf, size_t *blen) 178 { 179 if (*blen < sizeof(TEE_UUID)) { 180 *blen = sizeof(TEE_UUID); 181 return TEE_ERROR_SHORT_BUFFER; 182 } 183 *blen = sizeof(TEE_UUID); 184 return tee_svc_copy_to_user(buf, &sess->ctx->uuid, sizeof(TEE_UUID)); 185 } 186 187 /* Properties of the set TEE_PROPSET_CURRENT_CLIENT */ 188 const struct tee_props tee_propset_client[] = { 189 { 190 .name = "gpd.client.identity", 191 .prop_type = USER_TA_PROP_TYPE_IDENTITY, 192 .get_prop_func = get_prop_client_id 193 }, 194 }; 195 196 /* Properties of the set TEE_PROPSET_CURRENT_TA */ 197 const struct tee_props tee_propset_ta[] = { 198 { 199 .name = "gpd.ta.appID", 200 .prop_type = USER_TA_PROP_TYPE_UUID, 201 .get_prop_func = get_prop_ta_app_id 202 }, 203 204 /* 205 * Following properties are processed directly in libutee: 206 * TA_PROP_STR_SINGLE_INSTANCE 207 * TA_PROP_STR_MULTI_SESSION 208 * TA_PROP_STR_KEEP_ALIVE 209 * TA_PROP_STR_DATA_SIZE 210 * TA_PROP_STR_STACK_SIZE 211 * TA_PROP_STR_VERSION 212 * TA_PROP_STR_DESCRIPTION 213 * USER_TA_PROP_TYPE_STRING, 214 * TA_DESCRIPTION 215 */ 216 }; 217 218 /* Properties of the set TEE_PROPSET_TEE_IMPLEMENTATION */ 219 const struct tee_props tee_propset_tee[] = { 220 { 221 .name = "gpd.tee.apiversion", 222 .prop_type = USER_TA_PROP_TYPE_STRING, 223 .data = api_vers, 224 .len = sizeof(api_vers), 225 }, 226 { 227 .name = "gpd.tee.description", 228 .prop_type = USER_TA_PROP_TYPE_STRING, 229 .data = descr, .len = sizeof(descr) 230 }, 231 { 232 .name = "gpd.tee.deviceID", 233 .prop_type = USER_TA_PROP_TYPE_UUID, 234 .get_prop_func = get_prop_tee_dev_id 235 }, 236 { 237 .name = "gpd.tee.systemTime.protectionLevel", 238 .prop_type = USER_TA_PROP_TYPE_U32, 239 .get_prop_func = get_prop_tee_sys_time_prot_level 240 }, 241 { 242 .name = "gpd.tee.TAPersistentTime.protectionLevel", 243 .prop_type = USER_TA_PROP_TYPE_U32, 244 .data = &ta_time_prot_lvl, 245 .len = sizeof(ta_time_prot_lvl) 246 }, 247 { 248 .name = "gpd.tee.cryptography.ecc", 249 .prop_type = USER_TA_PROP_TYPE_BOOL, 250 .data = &crypto_ecc_en, 251 .len = sizeof(crypto_ecc_en) 252 }, 253 { 254 .name = "gpd.tee.trustedStorage.antiRollback.protectionLevel", 255 .prop_type = USER_TA_PROP_TYPE_U32, 256 .data = &ts_antiroll_prot_lvl, 257 .len = sizeof(ts_antiroll_prot_lvl) 258 }, 259 { 260 .name = "gpd.tee.trustedos.implementation.version", 261 .prop_type = USER_TA_PROP_TYPE_STRING, 262 .data = trustedos_impl_version, 263 .len = sizeof(trustedos_impl_version) 264 }, 265 { 266 .name = "gpd.tee.trustedos.implementation.binaryversion", 267 .prop_type = USER_TA_PROP_TYPE_U32, 268 .data = &trustedos_impl_bin_version, 269 .len = sizeof(trustedos_impl_bin_version) 270 }, 271 { 272 .name = "gpd.tee.trustedos.manufacturer", 273 .prop_type = USER_TA_PROP_TYPE_STRING, 274 .data = trustedos_manufacturer, 275 .len = sizeof(trustedos_manufacturer) 276 }, 277 { 278 .name = "gpd.tee.firmware.implementation.version", 279 .prop_type = USER_TA_PROP_TYPE_STRING, 280 .data = fw_impl_version, 281 .len = sizeof(fw_impl_version) 282 }, 283 { 284 .name = "gpd.tee.firmware.implementation.binaryversion", 285 .prop_type = USER_TA_PROP_TYPE_U32, 286 .data = &fw_impl_bin_version, 287 .len = sizeof(fw_impl_bin_version) 288 }, 289 { 290 .name = "gpd.tee.firmware.manufacturer", 291 .prop_type = USER_TA_PROP_TYPE_STRING, 292 .data = fw_manufacturer, 293 .len = sizeof(fw_manufacturer) 294 }, 295 296 /* 297 * Following properties are processed directly in libutee: 298 * gpd.tee.arith.maxBigIntSize 299 */ 300 }; 301 302 __weak const struct tee_vendor_props vendor_props_client; 303 __weak const struct tee_vendor_props vendor_props_ta; 304 __weak const struct tee_vendor_props vendor_props_tee; 305 306 static void get_prop_set(unsigned long prop_set, 307 const struct tee_props **props, 308 size_t *size, 309 const struct tee_props **vendor_props, 310 size_t *vendor_size) 311 { 312 if ((TEE_PropSetHandle)prop_set == TEE_PROPSET_CURRENT_CLIENT) { 313 *props = tee_propset_client; 314 *size = ARRAY_SIZE(tee_propset_client); 315 *vendor_props = vendor_props_client.props; 316 *vendor_size = vendor_props_client.len; 317 } else if ((TEE_PropSetHandle)prop_set == TEE_PROPSET_CURRENT_TA) { 318 *props = tee_propset_ta; 319 *size = ARRAY_SIZE(tee_propset_ta); 320 *vendor_props = vendor_props_ta.props; 321 *vendor_size = vendor_props_ta.len; 322 } else if ((TEE_PropSetHandle)prop_set == 323 TEE_PROPSET_TEE_IMPLEMENTATION) { 324 *props = tee_propset_tee; 325 *size = ARRAY_SIZE(tee_propset_tee); 326 *vendor_props = vendor_props_tee.props; 327 *vendor_size = vendor_props_tee.len; 328 } else { 329 *props = NULL; 330 *size = 0; 331 *vendor_props = NULL; 332 *vendor_size = 0; 333 } 334 } 335 336 static const struct tee_props *get_prop_struct(unsigned long prop_set, 337 unsigned long index) 338 { 339 const struct tee_props *props; 340 const struct tee_props *vendor_props; 341 size_t size; 342 size_t vendor_size; 343 344 get_prop_set(prop_set, &props, &size, &vendor_props, &vendor_size); 345 346 if (index < size) 347 return &(props[index]); 348 index -= size; 349 350 if (index < vendor_size) 351 return &(vendor_props[index]); 352 353 return NULL; 354 } 355 356 /* 357 * prop_set is part of TEE_PROPSET_xxx 358 * index is the index in the Property Set to retrieve 359 * if name is not NULL, the name of "index" property is returned 360 * if buf is not NULL, the property is returned 361 */ 362 TEE_Result syscall_get_property(unsigned long prop_set, 363 unsigned long index, 364 void *name, uint32_t *name_len, 365 void *buf, uint32_t *blen, 366 uint32_t *prop_type) 367 { 368 struct tee_ta_session *sess; 369 TEE_Result res; 370 TEE_Result res2; 371 const struct tee_props *prop; 372 uint32_t klen; 373 size_t klen_size; 374 uint32_t elen; 375 376 prop = get_prop_struct(prop_set, index); 377 if (!prop) 378 return TEE_ERROR_ITEM_NOT_FOUND; 379 380 res = tee_ta_get_current_session(&sess); 381 if (res != TEE_SUCCESS) 382 return res; 383 384 /* Get the property type */ 385 if (prop_type) { 386 res = tee_svc_copy_to_user(prop_type, &prop->prop_type, 387 sizeof(*prop_type)); 388 if (res != TEE_SUCCESS) 389 return res; 390 } 391 392 /* Get the property */ 393 if (buf && blen) { 394 res = tee_svc_copy_from_user(&klen, blen, sizeof(klen)); 395 if (res != TEE_SUCCESS) 396 return res; 397 398 if (prop->get_prop_func) { 399 klen_size = klen; 400 res = prop->get_prop_func(sess, buf, &klen_size); 401 klen = klen_size; 402 res2 = tee_svc_copy_to_user(blen, &klen, sizeof(*blen)); 403 } else { 404 if (klen < prop->len) 405 res = TEE_ERROR_SHORT_BUFFER; 406 else 407 res = tee_svc_copy_to_user(buf, prop->data, 408 prop->len); 409 res2 = tee_svc_copy_to_user(blen, &prop->len, 410 sizeof(*blen)); 411 } 412 if (res2 != TEE_SUCCESS) 413 return res2; 414 if (res != TEE_SUCCESS) 415 return res; 416 } 417 418 /* Get the property name */ 419 if (name && name_len) { 420 res = tee_svc_copy_from_user(&klen, name_len, sizeof(klen)); 421 if (res != TEE_SUCCESS) 422 return res; 423 424 elen = strlen(prop->name) + 1; 425 426 if (klen < elen) 427 res = TEE_ERROR_SHORT_BUFFER; 428 else 429 res = tee_svc_copy_to_user(name, prop->name, elen); 430 res2 = tee_svc_copy_to_user(name_len, &elen, sizeof(*name_len)); 431 if (res2 != TEE_SUCCESS) 432 return res2; 433 if (res != TEE_SUCCESS) 434 return res; 435 } 436 437 return res; 438 } 439 440 /* 441 * prop_set is part of TEE_PROPSET_xxx 442 */ 443 TEE_Result syscall_get_property_name_to_index(unsigned long prop_set, 444 void *name, 445 unsigned long name_len, 446 uint32_t *index) 447 { 448 TEE_Result res; 449 struct tee_ta_session *sess; 450 const struct tee_props *props; 451 size_t size; 452 const struct tee_props *vendor_props; 453 size_t vendor_size; 454 char *kname = 0; 455 uint32_t i; 456 457 get_prop_set(prop_set, &props, &size, &vendor_props, &vendor_size); 458 if (!props) 459 return TEE_ERROR_ITEM_NOT_FOUND; 460 461 res = tee_ta_get_current_session(&sess); 462 if (res != TEE_SUCCESS) 463 goto out; 464 465 if (!name || !name_len) { 466 res = TEE_ERROR_BAD_PARAMETERS; 467 goto out; 468 } 469 470 kname = malloc(name_len); 471 if (!kname) 472 return TEE_ERROR_OUT_OF_MEMORY; 473 res = tee_svc_copy_from_user(kname, name, name_len); 474 if (res != TEE_SUCCESS) 475 goto out; 476 kname[name_len - 1] = 0; 477 478 res = TEE_ERROR_ITEM_NOT_FOUND; 479 for (i = 0; i < size; i++) { 480 if (!strcmp(kname, props[i].name)) { 481 res = tee_svc_copy_to_user(index, &i, sizeof(*index)); 482 goto out; 483 } 484 } 485 for (i = size; i < size + vendor_size; i++) { 486 if (!strcmp(kname, vendor_props[i - size].name)) { 487 res = tee_svc_copy_to_user(index, &i, sizeof(*index)); 488 goto out; 489 } 490 } 491 492 out: 493 free(kname); 494 return res; 495 } 496 497 static void utee_param_to_param(struct tee_ta_param *p, struct utee_params *up) 498 { 499 size_t n; 500 uint32_t types = up->types; 501 502 p->types = types; 503 for (n = 0; n < TEE_NUM_PARAMS; n++) { 504 uintptr_t a = up->vals[n * 2]; 505 size_t b = up->vals[n * 2 + 1]; 506 507 switch (TEE_PARAM_TYPE_GET(types, n)) { 508 case TEE_PARAM_TYPE_MEMREF_INPUT: 509 case TEE_PARAM_TYPE_MEMREF_OUTPUT: 510 case TEE_PARAM_TYPE_MEMREF_INOUT: 511 p->u[n].mem.mobj = &mobj_virt; 512 p->u[n].mem.offs = a; 513 p->u[n].mem.size = b; 514 break; 515 case TEE_PARAM_TYPE_VALUE_INPUT: 516 case TEE_PARAM_TYPE_VALUE_INOUT: 517 p->u[n].val.a = a; 518 p->u[n].val.b = b; 519 break; 520 default: 521 memset(&p->u[n], 0, sizeof(p->u[n])); 522 break; 523 } 524 } 525 } 526 527 static TEE_Result alloc_temp_sec_mem(size_t size, struct mobj **mobj, 528 uint8_t **va) 529 { 530 /* Allocate section in secure DDR */ 531 #ifdef CFG_PAGED_USER_TA 532 *mobj = mobj_seccpy_shm_alloc(size); 533 #else 534 *mobj = mobj_mm_alloc(mobj_sec_ddr, size, &tee_mm_sec_ddr); 535 #endif 536 if (!*mobj) 537 return TEE_ERROR_GENERIC; 538 539 *va = mobj_get_va(*mobj, 0); 540 return TEE_SUCCESS; 541 } 542 543 /* 544 * TA invokes some TA with parameter. 545 * If some parameters are memory references: 546 * - either the memref is inside TA private RAM: TA is not allowed to expose 547 * its private RAM: use a temporary memory buffer and copy the data. 548 * - or the memref is not in the TA private RAM: 549 * - if the memref was mapped to the TA, TA is allowed to expose it. 550 * - if so, converts memref virtual address into a physical address. 551 */ 552 static TEE_Result tee_svc_copy_param(struct tee_ta_session *sess, 553 struct tee_ta_session *called_sess, 554 struct utee_params *callee_params, 555 struct tee_ta_param *param, 556 void *tmp_buf_va[TEE_NUM_PARAMS], 557 struct mobj **mobj_tmp) 558 { 559 size_t n; 560 TEE_Result res; 561 size_t req_mem = 0; 562 size_t s; 563 uint8_t *dst = 0; 564 bool ta_private_memref[TEE_NUM_PARAMS]; 565 struct user_ta_ctx *utc = to_user_ta_ctx(sess->ctx); 566 void *va; 567 size_t dst_offs; 568 569 /* fill 'param' input struct with caller params description buffer */ 570 if (!callee_params) { 571 memset(param, 0, sizeof(*param)); 572 } else { 573 res = tee_mmu_check_access_rights(utc, 574 TEE_MEMORY_ACCESS_READ | TEE_MEMORY_ACCESS_ANY_OWNER, 575 (uaddr_t)callee_params, sizeof(struct utee_params)); 576 if (res != TEE_SUCCESS) 577 return res; 578 utee_param_to_param(param, callee_params); 579 } 580 581 if (called_sess && is_pseudo_ta_ctx(called_sess->ctx)) { 582 /* pseudo TA borrows the mapping of the calling TA */ 583 return TEE_SUCCESS; 584 } 585 586 /* All mobj in param are of type MOJB_TYPE_VIRT */ 587 588 for (n = 0; n < TEE_NUM_PARAMS; n++) { 589 590 ta_private_memref[n] = false; 591 592 switch (TEE_PARAM_TYPE_GET(param->types, n)) { 593 case TEE_PARAM_TYPE_MEMREF_INPUT: 594 case TEE_PARAM_TYPE_MEMREF_OUTPUT: 595 case TEE_PARAM_TYPE_MEMREF_INOUT: 596 va = (void *)param->u[n].mem.offs; 597 s = param->u[n].mem.size; 598 if (!va) { 599 if (s) 600 return TEE_ERROR_BAD_PARAMETERS; 601 break; 602 } 603 /* uTA cannot expose its private memory */ 604 if (tee_mmu_is_vbuf_inside_ta_private(utc, va, s)) { 605 606 s = ROUNDUP(s, sizeof(uint32_t)); 607 if (ADD_OVERFLOW(req_mem, s, &req_mem)) 608 return TEE_ERROR_BAD_PARAMETERS; 609 ta_private_memref[n] = true; 610 break; 611 } 612 613 res = tee_mmu_vbuf_to_mobj_offs(utc, va, s, 614 ¶m->u[n].mem.mobj, 615 ¶m->u[n].mem.offs); 616 if (res != TEE_SUCCESS) 617 return res; 618 break; 619 default: 620 break; 621 } 622 } 623 624 if (req_mem == 0) 625 return TEE_SUCCESS; 626 627 res = alloc_temp_sec_mem(req_mem, mobj_tmp, &dst); 628 if (res != TEE_SUCCESS) 629 return res; 630 dst_offs = 0; 631 632 for (n = 0; n < TEE_NUM_PARAMS; n++) { 633 634 if (!ta_private_memref[n]) 635 continue; 636 637 s = ROUNDUP(param->u[n].mem.size, sizeof(uint32_t)); 638 639 switch (TEE_PARAM_TYPE_GET(param->types, n)) { 640 case TEE_PARAM_TYPE_MEMREF_INPUT: 641 case TEE_PARAM_TYPE_MEMREF_INOUT: 642 va = (void *)param->u[n].mem.offs; 643 if (va) { 644 res = tee_svc_copy_from_user(dst, va, 645 param->u[n].mem.size); 646 if (res != TEE_SUCCESS) 647 return res; 648 param->u[n].mem.offs = dst_offs; 649 param->u[n].mem.mobj = *mobj_tmp; 650 tmp_buf_va[n] = dst; 651 dst += s; 652 dst_offs += s; 653 } 654 break; 655 656 case TEE_PARAM_TYPE_MEMREF_OUTPUT: 657 va = (void *)param->u[n].mem.offs; 658 if (va) { 659 param->u[n].mem.offs = dst_offs; 660 param->u[n].mem.mobj = *mobj_tmp; 661 tmp_buf_va[n] = dst; 662 dst += s; 663 dst_offs += s; 664 } 665 break; 666 667 default: 668 continue; 669 } 670 } 671 672 return TEE_SUCCESS; 673 } 674 675 /* 676 * Back from execution of service: update parameters passed from TA: 677 * If some parameters were memory references: 678 * - either the memref was temporary: copy back data and update size 679 * - or it was the original TA memref: update only the size value. 680 */ 681 static TEE_Result tee_svc_update_out_param( 682 struct tee_ta_session *sess, 683 struct tee_ta_session *called_sess, 684 struct tee_ta_param *param, 685 void *tmp_buf_va[TEE_NUM_PARAMS], 686 struct utee_params *usr_param) 687 { 688 size_t n; 689 void *p; 690 struct user_ta_ctx *utc = to_user_ta_ctx(sess->ctx); 691 bool have_private_mem_map = is_user_ta_ctx(called_sess->ctx); 692 693 for (n = 0; n < TEE_NUM_PARAMS; n++) { 694 switch (TEE_PARAM_TYPE_GET(param->types, n)) { 695 case TEE_PARAM_TYPE_MEMREF_OUTPUT: 696 case TEE_PARAM_TYPE_MEMREF_INOUT: 697 p = (void *)(uintptr_t)usr_param->vals[n * 2]; 698 699 /* outside TA private => memref is valid, update size */ 700 if (!tee_mmu_is_vbuf_inside_ta_private(utc, p, 701 param->u[n].mem.size)) { 702 usr_param->vals[n * 2 + 1] = 703 param->u[n].mem.size; 704 break; 705 } 706 707 /* 708 * If we called a kernel TA the parameters are in shared 709 * memory and no copy is needed. 710 */ 711 if (have_private_mem_map && 712 param->u[n].mem.size <= 713 usr_param->vals[n * 2 + 1]) { 714 uint8_t *src = tmp_buf_va[n]; 715 TEE_Result res; 716 717 res = tee_svc_copy_to_user(p, src, 718 param->u[n].mem.size); 719 if (res != TEE_SUCCESS) 720 return res; 721 722 } 723 usr_param->vals[n * 2 + 1] = param->u[n].mem.size; 724 break; 725 726 case TEE_PARAM_TYPE_VALUE_OUTPUT: 727 case TEE_PARAM_TYPE_VALUE_INOUT: 728 usr_param->vals[n * 2] = param->u[n].val.a; 729 usr_param->vals[n * 2 + 1] = param->u[n].val.b; 730 break; 731 732 default: 733 continue; 734 } 735 } 736 737 return TEE_SUCCESS; 738 } 739 740 /* Called when a TA calls an OpenSession on another TA */ 741 TEE_Result syscall_open_ta_session(const TEE_UUID *dest, 742 unsigned long cancel_req_to, 743 struct utee_params *usr_param, uint32_t *ta_sess, 744 uint32_t *ret_orig) 745 { 746 TEE_Result res; 747 uint32_t ret_o = TEE_ORIGIN_TEE; 748 struct tee_ta_session *s = NULL; 749 struct tee_ta_session *sess; 750 struct mobj *mobj_param = NULL; 751 TEE_UUID *uuid = malloc(sizeof(TEE_UUID)); 752 struct tee_ta_param *param = malloc(sizeof(struct tee_ta_param)); 753 TEE_Identity *clnt_id = malloc(sizeof(TEE_Identity)); 754 void *tmp_buf_va[TEE_NUM_PARAMS]; 755 struct user_ta_ctx *utc; 756 757 if (uuid == NULL || param == NULL || clnt_id == NULL) { 758 res = TEE_ERROR_OUT_OF_MEMORY; 759 goto out_free_only; 760 } 761 762 memset(param, 0, sizeof(struct tee_ta_param)); 763 764 res = tee_ta_get_current_session(&sess); 765 if (res != TEE_SUCCESS) 766 goto out_free_only; 767 utc = to_user_ta_ctx(sess->ctx); 768 769 res = tee_svc_copy_from_user(uuid, dest, sizeof(TEE_UUID)); 770 if (res != TEE_SUCCESS) 771 goto function_exit; 772 773 clnt_id->login = TEE_LOGIN_TRUSTED_APP; 774 memcpy(&clnt_id->uuid, &sess->ctx->uuid, sizeof(TEE_UUID)); 775 776 res = tee_svc_copy_param(sess, NULL, usr_param, param, tmp_buf_va, 777 &mobj_param); 778 if (res != TEE_SUCCESS) 779 goto function_exit; 780 781 res = tee_ta_open_session(&ret_o, &s, &utc->open_sessions, uuid, 782 clnt_id, cancel_req_to, param); 783 tee_mmu_set_ctx(&utc->ctx); 784 if (res != TEE_SUCCESS) 785 goto function_exit; 786 787 res = tee_svc_update_out_param(sess, s, param, tmp_buf_va, usr_param); 788 789 function_exit: 790 mobj_free(mobj_param); 791 if (res == TEE_SUCCESS) 792 tee_svc_copy_kaddr_to_uref(ta_sess, s); 793 tee_svc_copy_to_user(ret_orig, &ret_o, sizeof(ret_o)); 794 795 out_free_only: 796 free(param); 797 free(uuid); 798 free(clnt_id); 799 return res; 800 } 801 802 TEE_Result syscall_close_ta_session(unsigned long ta_sess) 803 { 804 TEE_Result res; 805 struct tee_ta_session *sess; 806 TEE_Identity clnt_id; 807 struct tee_ta_session *s = tee_svc_uref_to_kaddr(ta_sess); 808 struct user_ta_ctx *utc; 809 810 res = tee_ta_get_current_session(&sess); 811 if (res != TEE_SUCCESS) 812 return res; 813 utc = to_user_ta_ctx(sess->ctx); 814 815 clnt_id.login = TEE_LOGIN_TRUSTED_APP; 816 memcpy(&clnt_id.uuid, &sess->ctx->uuid, sizeof(TEE_UUID)); 817 818 return tee_ta_close_session(s, &utc->open_sessions, &clnt_id); 819 } 820 821 TEE_Result syscall_invoke_ta_command(unsigned long ta_sess, 822 unsigned long cancel_req_to, unsigned long cmd_id, 823 struct utee_params *usr_param, uint32_t *ret_orig) 824 { 825 TEE_Result res; 826 TEE_Result res2; 827 uint32_t ret_o = TEE_ORIGIN_TEE; 828 struct tee_ta_param param = { 0 }; 829 TEE_Identity clnt_id; 830 struct tee_ta_session *sess; 831 struct tee_ta_session *called_sess; 832 struct mobj *mobj_param = NULL; 833 void *tmp_buf_va[TEE_NUM_PARAMS]; 834 struct user_ta_ctx *utc; 835 836 res = tee_ta_get_current_session(&sess); 837 if (res != TEE_SUCCESS) 838 return res; 839 utc = to_user_ta_ctx(sess->ctx); 840 841 called_sess = tee_ta_get_session( 842 (vaddr_t)tee_svc_uref_to_kaddr(ta_sess), true, 843 &utc->open_sessions); 844 if (!called_sess) 845 return TEE_ERROR_BAD_PARAMETERS; 846 847 clnt_id.login = TEE_LOGIN_TRUSTED_APP; 848 memcpy(&clnt_id.uuid, &sess->ctx->uuid, sizeof(TEE_UUID)); 849 850 res = tee_svc_copy_param(sess, called_sess, usr_param, ¶m, 851 tmp_buf_va, &mobj_param); 852 if (res != TEE_SUCCESS) 853 goto function_exit; 854 855 res = tee_ta_invoke_command(&ret_o, called_sess, &clnt_id, 856 cancel_req_to, cmd_id, ¶m); 857 858 res2 = tee_svc_update_out_param(sess, called_sess, ¶m, tmp_buf_va, 859 usr_param); 860 if (res2 != TEE_SUCCESS) { 861 /* 862 * Spec for TEE_InvokeTACommand() says: 863 * "If the return origin is different from 864 * TEE_ORIGIN_TRUSTED_APP, then the function has failed 865 * before it could reach the destination Trusted 866 * Application." 867 * 868 * But if we can't update params to the caller we have no 869 * choice we need to return some error to indicate that 870 * parameters aren't updated as expected. 871 */ 872 ret_o = TEE_ORIGIN_TEE; 873 res = res2; 874 } 875 876 function_exit: 877 tee_ta_put_session(called_sess); 878 mobj_free(mobj_param); 879 if (ret_orig) 880 tee_svc_copy_to_user(ret_orig, &ret_o, sizeof(ret_o)); 881 return res; 882 } 883 884 TEE_Result syscall_check_access_rights(unsigned long flags, const void *buf, 885 size_t len) 886 { 887 TEE_Result res; 888 struct tee_ta_session *s; 889 890 res = tee_ta_get_current_session(&s); 891 if (res != TEE_SUCCESS) 892 return res; 893 894 return tee_mmu_check_access_rights(to_user_ta_ctx(s->ctx), flags, 895 (uaddr_t)buf, len); 896 } 897 898 TEE_Result tee_svc_copy_from_user(void *kaddr, const void *uaddr, size_t len) 899 { 900 TEE_Result res; 901 struct tee_ta_session *s; 902 903 res = tee_ta_get_current_session(&s); 904 if (res != TEE_SUCCESS) 905 return res; 906 907 res = tee_mmu_check_access_rights(to_user_ta_ctx(s->ctx), 908 TEE_MEMORY_ACCESS_READ | 909 TEE_MEMORY_ACCESS_ANY_OWNER, 910 (uaddr_t)uaddr, len); 911 if (res != TEE_SUCCESS) 912 return res; 913 914 memcpy(kaddr, uaddr, len); 915 return TEE_SUCCESS; 916 } 917 918 TEE_Result tee_svc_copy_to_user(void *uaddr, const void *kaddr, size_t len) 919 { 920 TEE_Result res; 921 struct tee_ta_session *s; 922 923 res = tee_ta_get_current_session(&s); 924 if (res != TEE_SUCCESS) 925 return res; 926 927 res = tee_mmu_check_access_rights(to_user_ta_ctx(s->ctx), 928 TEE_MEMORY_ACCESS_WRITE | 929 TEE_MEMORY_ACCESS_ANY_OWNER, 930 (uaddr_t)uaddr, len); 931 if (res != TEE_SUCCESS) 932 return res; 933 934 memcpy(uaddr, kaddr, len); 935 return TEE_SUCCESS; 936 } 937 938 TEE_Result tee_svc_copy_kaddr_to_uref(uint32_t *uref, void *kaddr) 939 { 940 uint32_t ref = tee_svc_kaddr_to_uref(kaddr); 941 942 return tee_svc_copy_to_user(uref, &ref, sizeof(ref)); 943 } 944 945 TEE_Result syscall_get_cancellation_flag(uint32_t *cancel) 946 { 947 TEE_Result res; 948 struct tee_ta_session *s = NULL; 949 uint32_t c; 950 951 res = tee_ta_get_current_session(&s); 952 if (res != TEE_SUCCESS) 953 return res; 954 955 c = tee_ta_session_is_cancelled(s, NULL); 956 957 return tee_svc_copy_to_user(cancel, &c, sizeof(c)); 958 } 959 960 TEE_Result syscall_unmask_cancellation(uint32_t *old_mask) 961 { 962 TEE_Result res; 963 struct tee_ta_session *s = NULL; 964 uint32_t m; 965 966 res = tee_ta_get_current_session(&s); 967 if (res != TEE_SUCCESS) 968 return res; 969 970 m = s->cancel_mask; 971 s->cancel_mask = false; 972 return tee_svc_copy_to_user(old_mask, &m, sizeof(m)); 973 } 974 975 TEE_Result syscall_mask_cancellation(uint32_t *old_mask) 976 { 977 TEE_Result res; 978 struct tee_ta_session *s = NULL; 979 uint32_t m; 980 981 res = tee_ta_get_current_session(&s); 982 if (res != TEE_SUCCESS) 983 return res; 984 985 m = s->cancel_mask; 986 s->cancel_mask = true; 987 return tee_svc_copy_to_user(old_mask, &m, sizeof(m)); 988 } 989 990 TEE_Result syscall_wait(unsigned long timeout) 991 { 992 TEE_Result res = TEE_SUCCESS; 993 uint32_t mytime = 0; 994 struct tee_ta_session *s; 995 TEE_Time base_time; 996 TEE_Time current_time; 997 998 res = tee_ta_get_current_session(&s); 999 if (res != TEE_SUCCESS) 1000 return res; 1001 1002 res = tee_time_get_sys_time(&base_time); 1003 if (res != TEE_SUCCESS) 1004 return res; 1005 1006 while (true) { 1007 res = tee_time_get_sys_time(¤t_time); 1008 if (res != TEE_SUCCESS) 1009 return res; 1010 1011 if (tee_ta_session_is_cancelled(s, ¤t_time)) 1012 return TEE_ERROR_CANCEL; 1013 1014 mytime = (current_time.seconds - base_time.seconds) * 1000 + 1015 (int)current_time.millis - (int)base_time.millis; 1016 if (mytime >= timeout) 1017 return TEE_SUCCESS; 1018 1019 tee_time_wait(timeout - mytime); 1020 } 1021 1022 return res; 1023 } 1024 1025 TEE_Result syscall_get_time(unsigned long cat, TEE_Time *mytime) 1026 { 1027 TEE_Result res, res2; 1028 struct tee_ta_session *s = NULL; 1029 TEE_Time t; 1030 1031 res = tee_ta_get_current_session(&s); 1032 if (res != TEE_SUCCESS) 1033 return res; 1034 1035 switch (cat) { 1036 case UTEE_TIME_CAT_SYSTEM: 1037 res = tee_time_get_sys_time(&t); 1038 break; 1039 case UTEE_TIME_CAT_TA_PERSISTENT: 1040 res = tee_time_get_ta_time((const void *)&s->ctx->uuid, &t); 1041 break; 1042 case UTEE_TIME_CAT_REE: 1043 res = tee_time_get_ree_time(&t); 1044 break; 1045 default: 1046 res = TEE_ERROR_BAD_PARAMETERS; 1047 break; 1048 } 1049 1050 if (res == TEE_SUCCESS || res == TEE_ERROR_OVERFLOW) { 1051 res2 = tee_svc_copy_to_user(mytime, &t, sizeof(t)); 1052 if (res2 != TEE_SUCCESS) 1053 res = res2; 1054 } 1055 1056 return res; 1057 } 1058 1059 TEE_Result syscall_set_ta_time(const TEE_Time *mytime) 1060 { 1061 TEE_Result res; 1062 struct tee_ta_session *s = NULL; 1063 TEE_Time t; 1064 1065 res = tee_ta_get_current_session(&s); 1066 if (res != TEE_SUCCESS) 1067 return res; 1068 1069 res = tee_svc_copy_from_user(&t, mytime, sizeof(t)); 1070 if (res != TEE_SUCCESS) 1071 return res; 1072 1073 return tee_time_set_ta_time((const void *)&s->ctx->uuid, &t); 1074 } 1075