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