1 /* 2 * Copyright (c) 2014, STMicroelectronics International N.V. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * 11 * 2. Redistributions in binary form must reproduce the above copyright notice, 12 * this list of conditions and the following disclaimer in the documentation 13 * and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25 * POSSIBILITY OF SUCH DAMAGE. 26 */ 27 #include <kernel/tee_common_otp.h> 28 #include <kernel/tee_common.h> 29 #include <kernel/tee_compat.h> 30 #include <tee_api_types.h> 31 #include <kernel/tee_ta_manager.h> 32 #include <utee_types.h> 33 #include <tee/tee_svc.h> 34 #include <mm/tee_mmu.h> 35 #include <mm/tee_mm.h> 36 #include <kernel/tee_rpc.h> 37 #include <kernel/tee_rpc_types.h> 38 #include <kernel/tee_time.h> 39 40 #include <user_ta_header.h> 41 #include <kernel/tee_core_trace.h> 42 #include <kernel/tee_kta_trace.h> 43 #include <kernel/chip_services.h> 44 #include <tee/tee_hash.h> 45 46 47 void tee_svc_sys_log(const void *buf, size_t len) 48 { 49 char *kbuf; 50 51 if (len == 0) 52 return; 53 54 kbuf = malloc(len); 55 if (kbuf == NULL) 56 return; 57 *kbuf = '\0'; 58 59 /* log as Info/Raw traces */ 60 if (tee_svc_copy_from_user(NULL, kbuf, buf, len) == TEE_SUCCESS) 61 ATAMSG_RAW("%s", kbuf); 62 63 free(kbuf); 64 } 65 66 void tee_svc_sys_panic(uint32_t code) 67 { 68 struct tee_ta_session *sess; 69 70 if (tee_ta_get_current_session(&sess) == TEE_SUCCESS) { 71 EMSG("Set session 0x%x to panicked", sess); 72 sess->ctx->panicked = 1; 73 sess->ctx->panic_code = code; 74 75 { 76 /* 77 * Force panicking. This memory error will be trapped by 78 * the error exception handler myErrorHandler() 79 */ 80 EMSG("Following 'DTLB exception in bundle'"); 81 EMSG(" is generated with code %d", code); 82 int *p = 0; 83 *p = 1; 84 } 85 } else { 86 DMSG("Panic called from unknown TA"); 87 } 88 } 89 90 uint32_t tee_svc_sys_dummy(uint32_t *a) 91 { 92 DMSG("tee_svc_sys_dummy: a 0x%x", (unsigned int)a); 93 return 0; 94 } 95 96 uint32_t tee_svc_sys_dummy_7args(uint32_t a1, uint32_t a2, uint32_t a3, 97 uint32_t a4, uint32_t a5, uint32_t a6, 98 uint32_t a7) 99 { 100 DMSG("tee_svc_sys_dummy_7args: 0x%x, 0x%x, 0x%x, 0x%x, 0x%x, %x, %x\n", 101 a1, a2, a3, a4, a5, a6, a7); 102 return 0; 103 } 104 105 uint32_t tee_svc_sys_nocall(void) 106 { 107 DMSG("No syscall"); 108 return 0x1; 109 } 110 111 TEE_Result tee_svc_sys_get_property(uint32_t prop, tee_uaddr_t buf, size_t blen) 112 { 113 static const char api_vers[] = "1.0"; 114 static const char descr[] = "Version N.N"; 115 /* 116 * Value 100 means: 117 * System time based on REE-controlled timers. Can be tampered by the 118 * REE. The implementation must still guarantee that the system time 119 * is monotonous, i.e., successive calls to TEE_GetSystemTime must 120 * return increasing values of the system time. 121 */ 122 static const uint32_t sys_time_prot_lvl = 100; 123 static const uint32_t ta_time_prot_lvl = 100; 124 struct tee_ta_session *sess; 125 TEE_Result res; 126 127 res = tee_ta_get_current_session(&sess); 128 if (res != TEE_SUCCESS) 129 return res; 130 131 switch (prop) { 132 case UTEE_PROP_TEE_API_VERSION: 133 if (blen < sizeof(api_vers)) 134 return TEE_ERROR_SHORT_BUFFER; 135 return tee_svc_copy_to_user(sess, (void *)buf, api_vers, 136 sizeof(api_vers)); 137 138 case UTEE_PROP_TEE_DESCR: 139 if (blen < sizeof(descr)) 140 return TEE_ERROR_SHORT_BUFFER; 141 return tee_svc_copy_to_user(sess, (void *)buf, descr, 142 sizeof(descr)); 143 144 case UTEE_PROP_TEE_DEV_ID: 145 { 146 TEE_UUID uuid; 147 const size_t nslen = 4; 148 uint8_t data[4 + 149 FVR_DIE_ID_NUM_REGS * sizeof(uint32_t)] = { 150 'S', 'T', 'E', 'E' }; 151 152 if (blen < sizeof(uuid)) 153 return TEE_ERROR_SHORT_BUFFER; 154 155 if (tee_otp_get_die_id 156 (data + nslen, sizeof(data) - nslen)) 157 return TEE_ERROR_BAD_STATE; 158 159 res = tee_hash_createdigest( 160 TEE_ALG_SHA256, 161 data, sizeof(data), 162 (uint8_t *)&uuid, sizeof(uuid)); 163 if (res != TEE_SUCCESS) 164 return TEE_ERROR_BAD_STATE; 165 166 /* 167 * Changes the random value into and UUID as specifiec 168 * in RFC 4122. The magic values are from the example 169 * code in the RFC. 170 * 171 * TEE_UUID is defined slightly different from the RFC, 172 * but close enough for our purpose. 173 */ 174 175 uuid.timeHiAndVersion &= 0x0fff; 176 uuid.timeHiAndVersion |= 5 << 12; 177 178 /* uuid.clock_seq_hi_and_reserved in the RFC */ 179 uuid.clockSeqAndNode[0] &= 0x3f; 180 uuid.clockSeqAndNode[0] |= 0x80; 181 182 return tee_svc_copy_to_user(sess, (void *)buf, &uuid, 183 sizeof(TEE_UUID)); 184 } 185 186 case UTEE_PROP_TEE_SYS_TIME_PROT_LEVEL: 187 if (blen < sizeof(sys_time_prot_lvl)) 188 return TEE_ERROR_SHORT_BUFFER; 189 return tee_svc_copy_to_user(sess, (void *)buf, 190 &sys_time_prot_lvl, 191 sizeof(sys_time_prot_lvl)); 192 193 case UTEE_PROP_TEE_TA_TIME_PROT_LEVEL: 194 if (blen < sizeof(ta_time_prot_lvl)) 195 return TEE_ERROR_SHORT_BUFFER; 196 return tee_svc_copy_to_user(sess, (void *)buf, 197 &ta_time_prot_lvl, 198 sizeof(ta_time_prot_lvl)); 199 200 case UTEE_PROP_CLIENT_ID: 201 { 202 if (blen < sizeof(TEE_Identity)) 203 return TEE_ERROR_SHORT_BUFFER; 204 205 return tee_svc_copy_to_user(sess, (void *)buf, 206 &sess->clnt_id, 207 sizeof(TEE_Identity)); 208 } 209 case UTEE_PROP_TA_APP_ID: 210 { 211 if (blen < sizeof(TEE_UUID)) 212 return TEE_ERROR_SHORT_BUFFER; 213 214 return tee_svc_copy_to_user(sess, (void *)buf, 215 &sess->ctx->head->uuid, 216 sizeof(TEE_UUID)); 217 } 218 219 default: 220 break; 221 } 222 return TEE_ERROR_NOT_IMPLEMENTED; 223 } 224 225 /* 226 * TA invokes some TA with parameter. 227 * If some parameters are memory references: 228 * - either the memref is inside TA private RAM: TA is not allowed to expose 229 * its private RAM: use a temporary memory buffer and copy the data. 230 * - or the memref is not in the TA private RAM: 231 * - if the memref was mapped to the TA, TA is allowed to expose it. 232 * - if so, converts memref virtual address into a physical address. 233 */ 234 static TEE_Result tee_svc_copy_param(struct tee_ta_session *sess, 235 struct tee_ta_session *called_sess, 236 uint32_t param_types, 237 TEE_Param params[TEE_NUM_PARAMS], 238 struct tee_ta_param *param, 239 tee_paddr_t tmp_buf_pa[TEE_NUM_PARAMS], 240 tee_mm_entry_t **mm) 241 { 242 size_t n; 243 TEE_Result res; 244 size_t req_mem = 0; 245 size_t s; 246 uint8_t *dst = 0; 247 tee_paddr_t dst_pa, src_pa = 0; 248 bool ta_private_memref[TEE_NUM_PARAMS]; 249 250 param->types = param_types; 251 if (params == NULL) { 252 if (param->types != 0) 253 return TEE_ERROR_BAD_PARAMETERS; 254 memset(param->params, 0, sizeof(param->params)); 255 } else { 256 tee_svc_copy_from_user(sess, param->params, params, 257 sizeof(param->params)); 258 } 259 260 if ((called_sess != NULL) && 261 (called_sess->ctx->static_ta == NULL) && 262 (called_sess->ctx->flags & TA_FLAG_USER_MODE) == 0) { 263 /* 264 * kernel TA, borrow the mapping of the calling 265 * during this call. 266 */ 267 called_sess->calling_sess = sess; 268 return TEE_SUCCESS; 269 } 270 271 for (n = 0; n < TEE_NUM_PARAMS; n++) { 272 273 ta_private_memref[n] = false; 274 275 switch (TEE_PARAM_TYPE_GET(param->types, n)) { 276 case TEE_PARAM_TYPE_MEMREF_INPUT: 277 case TEE_PARAM_TYPE_MEMREF_OUTPUT: 278 case TEE_PARAM_TYPE_MEMREF_INOUT: 279 if (param->params[n].memref.buffer == NULL) { 280 if (param->params[n].memref.size != 0) 281 return TEE_ERROR_BAD_PARAMETERS; 282 break; 283 } 284 /* uTA cannot expose its private memory */ 285 if (tee_mmu_is_vbuf_inside_ta_private(sess->ctx, 286 (uintptr_t)param->params[n].memref.buffer, 287 param->params[n].memref.size)) { 288 289 s = TEE_ROUNDUP(param->params[n].memref.size, 290 sizeof(uint32_t)); 291 /* Check overflow */ 292 if (req_mem + s < req_mem) 293 return TEE_ERROR_BAD_PARAMETERS; 294 req_mem += s; 295 ta_private_memref[n] = true; 296 break; 297 } 298 if (!tee_mmu_is_vbuf_outside_ta_private(sess->ctx, 299 (uintptr_t)param->params[n].memref.buffer, 300 param->params[n].memref.size)) 301 return TEE_ERROR_BAD_PARAMETERS; 302 303 if (tee_mmu_user_va2pa(sess->ctx, 304 (void *)param->params[n].memref.buffer, 305 (void **)&src_pa) != TEE_SUCCESS) 306 return TEE_ERROR_BAD_PARAMETERS; 307 308 param->param_attr[n] = tee_mmu_user_get_cache_attr( 309 sess->ctx, 310 (void *)param->params[n].memref.buffer); 311 312 param->params[n].memref.buffer = (void *)src_pa; 313 break; 314 315 default: 316 break; 317 } 318 } 319 320 if (req_mem == 0) 321 return TEE_SUCCESS; 322 323 /* Allocate section in secure DDR */ 324 *mm = tee_mm_alloc(&tee_mm_sec_ddr, req_mem); 325 if (*mm == NULL) { 326 DMSG("tee_mm_alloc TEE_ERROR_GENERIC"); 327 return TEE_ERROR_GENERIC; 328 } 329 330 /* Get the virtual address for the section in secure DDR */ 331 res = tee_mmu_kmap(tee_mm_get_smem(*mm), req_mem, &dst); 332 if (res != TEE_SUCCESS) 333 return res; 334 dst_pa = tee_mm_get_smem(*mm); 335 336 for (n = 0; n < 4; n++) { 337 338 if (ta_private_memref[n] == false) 339 continue; 340 341 s = TEE_ROUNDUP(param->params[n].memref.size, sizeof(uint32_t)); 342 343 switch (TEE_PARAM_TYPE_GET(param->types, n)) { 344 case TEE_PARAM_TYPE_MEMREF_INPUT: 345 case TEE_PARAM_TYPE_MEMREF_INOUT: 346 if (param->params[n].memref.buffer != NULL) { 347 res = tee_svc_copy_from_user(sess, dst, 348 param->params[n]. 349 memref.buffer, 350 param->params[n]. 351 memref.size); 352 if (res != TEE_SUCCESS) 353 return res; 354 355 param->param_attr[n] = 356 tee_mmu_kmap_get_cache_attr(dst); 357 param->params[n].memref.buffer = (void *)dst_pa; 358 tmp_buf_pa[n] = dst_pa; 359 dst += s; 360 dst_pa += s; 361 } 362 break; 363 364 case TEE_PARAM_TYPE_MEMREF_OUTPUT: 365 if (param->params[n].memref.buffer != NULL) { 366 param->param_attr[n] = 367 tee_mmu_kmap_get_cache_attr(dst); 368 param->params[n].memref.buffer = (void *)dst_pa; 369 tmp_buf_pa[n] = dst_pa; 370 dst += s; 371 dst_pa += s; 372 } 373 break; 374 375 default: 376 continue; 377 } 378 } 379 380 tee_mmu_kunmap(dst, req_mem); 381 382 return TEE_SUCCESS; 383 } 384 385 /* 386 * Back from execution of service: update parameters passed from TA: 387 * If some parameters were memory references: 388 * - either the memref was temporary: copy back data and update size 389 * - or it was the original TA memref: update only the size value. 390 */ 391 static TEE_Result tee_svc_update_out_param( 392 struct tee_ta_session *sess, 393 struct tee_ta_session *called_sess, 394 struct tee_ta_param *param, 395 tee_paddr_t tmp_buf_pa[TEE_NUM_PARAMS], 396 TEE_Param params[TEE_NUM_PARAMS]) 397 { 398 size_t n; 399 bool have_private_mem_map = (called_sess == NULL) || 400 (called_sess->ctx->static_ta != NULL) || 401 ((called_sess->ctx->flags & TA_FLAG_USER_MODE) != 0); 402 403 tee_ta_set_current_session(sess); 404 405 for (n = 0; n < TEE_NUM_PARAMS; n++) { 406 switch (TEE_PARAM_TYPE_GET(param->types, n)) { 407 case TEE_PARAM_TYPE_MEMREF_OUTPUT: 408 case TEE_PARAM_TYPE_MEMREF_INOUT: 409 410 /* outside TA private => memref is valid, update size */ 411 if (!tee_mmu_is_vbuf_inside_ta_private(sess->ctx, 412 (uintptr_t)params[n].memref.buffer, 413 param->params[n].memref.size)) { 414 params[n].memref.size = 415 param->params[n].memref.size; 416 break; 417 } 418 419 /* 420 * If we called a kernel TA the parameters are in shared 421 * memory and no copy is needed. 422 */ 423 if (have_private_mem_map && 424 param->params[n].memref.size <= 425 params[n].memref.size) { 426 uint8_t *src = 0; 427 TEE_Result res; 428 429 /* FIXME: TA_RAM is already mapped ! */ 430 res = tee_mmu_kmap(tmp_buf_pa[n], 431 param->params[n].memref.size, &src); 432 if (res != TEE_SUCCESS) 433 return TEE_ERROR_GENERIC; 434 435 res = tee_svc_copy_to_user(sess, 436 params[n].memref. 437 buffer, src, 438 param->params[n]. 439 memref.size); 440 if (res != TEE_SUCCESS) 441 return res; 442 tee_mmu_kunmap(src, 443 param->params[n].memref.size); 444 445 } 446 params[n].memref.size = param->params[n].memref.size; 447 break; 448 449 case TEE_PARAM_TYPE_VALUE_OUTPUT: 450 case TEE_PARAM_TYPE_VALUE_INOUT: 451 params[n].value = param->params[n].value; 452 break; 453 454 default: 455 continue; 456 } 457 } 458 459 return TEE_SUCCESS; 460 } 461 462 /* Called when a TA calls an OpenSession on another TA */ 463 TEE_Result tee_svc_open_ta_session(const TEE_UUID *dest, 464 uint32_t cancel_req_to, uint32_t param_types, 465 TEE_Param params[4], 466 TEE_TASessionHandle *ta_sess, 467 uint32_t *ret_orig) 468 { 469 TEE_Result res; 470 uint32_t ret_o = TEE_ORIGIN_TEE; 471 struct tee_ta_session *s = NULL; 472 struct tee_ta_session *sess; 473 tee_mm_entry_t *mm_param = NULL; 474 475 TEE_UUID *uuid = malloc(sizeof(TEE_UUID)); 476 struct tee_ta_param *param = malloc(sizeof(struct tee_ta_param)); 477 TEE_Identity *clnt_id = malloc(sizeof(TEE_Identity)); 478 tee_paddr_t tmp_buf_pa[TEE_NUM_PARAMS]; 479 480 if (uuid == NULL || param == NULL || clnt_id == NULL) { 481 res = TEE_ERROR_OUT_OF_MEMORY; 482 goto out_free_only; 483 } 484 485 memset(param, 0, sizeof(struct tee_ta_param)); 486 487 res = tee_ta_get_current_session(&sess); 488 if (res != TEE_SUCCESS) 489 goto out_free_only; 490 491 res = tee_svc_copy_from_user(sess, uuid, dest, sizeof(TEE_UUID)); 492 if (res != TEE_SUCCESS) 493 goto function_exit; 494 495 clnt_id->login = TEE_LOGIN_TRUSTED_APP; 496 memcpy(&clnt_id->uuid, &sess->ctx->head->uuid, sizeof(TEE_UUID)); 497 498 res = tee_svc_copy_param(sess, NULL, param_types, params, param, 499 tmp_buf_pa, &mm_param); 500 if (res != TEE_SUCCESS) 501 goto function_exit; 502 503 /* 504 * Find session of a multi session TA or a static TA 505 * In such a case, there is no need to ask the supplicant for the TA 506 * code 507 */ 508 res = tee_ta_open_session(&ret_o, &s, &sess->ctx->open_sessions, uuid, 509 clnt_id, cancel_req_to, param); 510 if (res != TEE_SUCCESS) 511 goto function_exit; 512 513 res = tee_svc_update_out_param(sess, NULL, param, tmp_buf_pa, params); 514 if (res != TEE_SUCCESS) 515 goto function_exit; 516 517 function_exit: 518 tee_ta_set_current_session(sess); 519 520 if (mm_param != NULL) { 521 TEE_Result res2; 522 void *va = 0; 523 524 res2 = 525 tee_mmu_kmap_pa2va((void *)tee_mm_get_smem(mm_param), &va); 526 if (res2 == TEE_SUCCESS) 527 tee_mmu_kunmap(va, tee_mm_get_bytes(mm_param)); 528 } 529 tee_mm_free(mm_param); 530 tee_svc_copy_to_user(sess, ta_sess, &s, sizeof(s)); 531 tee_svc_copy_to_user(sess, ret_orig, &ret_o, sizeof(ret_o)); 532 533 out_free_only: 534 free(param); 535 free(uuid); 536 free(clnt_id); 537 return res; 538 } 539 540 TEE_Result tee_svc_close_ta_session(TEE_TASessionHandle ta_sess) 541 { 542 TEE_Result res; 543 struct tee_ta_session *sess; 544 545 res = tee_ta_get_current_session(&sess); 546 if (res != TEE_SUCCESS) 547 return res; 548 549 tee_ta_set_current_session(NULL); 550 551 res = 552 tee_ta_close_session((uint32_t)ta_sess, &sess->ctx->open_sessions); 553 tee_ta_set_current_session(sess); 554 return res; 555 } 556 557 TEE_Result tee_svc_invoke_ta_command(TEE_TASessionHandle ta_sess, 558 uint32_t cancel_req_to, uint32_t cmd_id, 559 uint32_t param_types, TEE_Param params[4], 560 uint32_t *ret_orig) 561 { 562 TEE_Result res; 563 uint32_t ret_o = TEE_ORIGIN_TEE; 564 struct tee_ta_param param = { 0 }; 565 TEE_Identity clnt_id; 566 struct tee_ta_session *sess; 567 struct tee_ta_session *called_sess = (struct tee_ta_session *)ta_sess; 568 tee_mm_entry_t *mm_param = NULL; 569 tee_paddr_t tmp_buf_pa[TEE_NUM_PARAMS]; 570 571 res = tee_ta_get_current_session(&sess); 572 if (res != TEE_SUCCESS) 573 return res; 574 575 res = 576 tee_ta_verify_session_pointer(called_sess, 577 &sess->ctx->open_sessions); 578 if (res != TEE_SUCCESS) 579 return res; 580 581 res = tee_svc_copy_param(sess, called_sess, param_types, params, 582 ¶m, tmp_buf_pa, &mm_param); 583 if (res != TEE_SUCCESS) 584 goto function_exit; 585 586 res = 587 tee_ta_invoke_command(&ret_o, called_sess, &clnt_id, cancel_req_to, 588 cmd_id, ¶m); 589 if (res != TEE_SUCCESS) 590 goto function_exit; 591 592 res = tee_svc_update_out_param(sess, called_sess, ¶m, tmp_buf_pa, 593 params); 594 if (res != TEE_SUCCESS) 595 goto function_exit; 596 597 function_exit: 598 tee_ta_set_current_session(sess); 599 called_sess->calling_sess = NULL; /* clear eventual borrowed mapping */ 600 601 if (mm_param != NULL) { 602 TEE_Result res2; 603 void *va = 0; 604 605 res2 = 606 tee_mmu_kmap_pa2va((void *)tee_mm_get_smem(mm_param), &va); 607 if (res2 == TEE_SUCCESS) 608 tee_mmu_kunmap(va, tee_mm_get_bytes(mm_param)); 609 } 610 tee_mm_free(mm_param); 611 if (ret_orig) 612 tee_svc_copy_to_user(sess, ret_orig, &ret_o, sizeof(ret_o)); 613 return res; 614 } 615 616 TEE_Result tee_svc_check_access_rights(uint32_t flags, const void *buf, 617 size_t len) 618 { 619 TEE_Result res; 620 struct tee_ta_session *s; 621 622 res = tee_ta_get_current_session(&s); 623 if (res != TEE_SUCCESS) 624 return res; 625 626 return tee_mmu_check_access_rights(s->ctx, flags, (tee_uaddr_t)buf, 627 len); 628 } 629 630 TEE_Result tee_svc_copy_from_user(struct tee_ta_session *sess, void *kaddr, 631 const void *uaddr, size_t len) 632 { 633 TEE_Result res; 634 struct tee_ta_session *s; 635 636 if (sess == NULL) { 637 res = tee_ta_get_current_session(&s); 638 if (res != TEE_SUCCESS) 639 return res; 640 } else { 641 s = sess; 642 tee_ta_set_current_session(s); 643 } 644 res = 645 tee_mmu_check_access_rights(s->ctx, 646 TEE_MEMORY_ACCESS_READ | 647 TEE_MEMORY_ACCESS_ANY_OWNER, 648 (tee_uaddr_t)uaddr, len); 649 if (res != TEE_SUCCESS) 650 return res; 651 652 memcpy(kaddr, uaddr, len); 653 return TEE_SUCCESS; 654 } 655 656 TEE_Result tee_svc_copy_to_user(struct tee_ta_session *sess, void *uaddr, 657 const void *kaddr, size_t len) 658 { 659 TEE_Result res; 660 struct tee_ta_session *s; 661 662 if (sess == NULL) { 663 res = tee_ta_get_current_session(&s); 664 if (res != TEE_SUCCESS) 665 return res; 666 } else { 667 s = sess; 668 tee_ta_set_current_session(s); 669 } 670 671 res = 672 tee_mmu_check_access_rights(s->ctx, 673 TEE_MEMORY_ACCESS_WRITE | 674 TEE_MEMORY_ACCESS_ANY_OWNER, 675 (tee_uaddr_t)uaddr, len); 676 if (res != TEE_SUCCESS) 677 return res; 678 679 memcpy(uaddr, kaddr, len); 680 return TEE_SUCCESS; 681 } 682 683 static bool session_is_cancelled(struct tee_ta_session *s, TEE_Time *curr_time) 684 { 685 TEE_Time current_time; 686 687 if (s->cancel_mask) 688 return false; 689 690 if (s->cancel) 691 return true; 692 693 if (s->cancel_time.seconds == UINT32_MAX) 694 return false; 695 696 if (curr_time != NULL) 697 current_time = *curr_time; 698 else if (tee_time_get_sys_time(¤t_time) != TEE_SUCCESS) 699 return false; 700 701 if (current_time.seconds > s->cancel_time.seconds || 702 (current_time.seconds == s->cancel_time.seconds && 703 current_time.millis >= s->cancel_time.millis)) { 704 return true; 705 } 706 707 return false; 708 } 709 710 TEE_Result tee_svc_get_cancellation_flag(bool *cancel) 711 { 712 TEE_Result res; 713 struct tee_ta_session *s = NULL; 714 bool c; 715 716 res = tee_ta_get_current_session(&s); 717 if (res != TEE_SUCCESS) 718 return res; 719 720 c = session_is_cancelled(s, NULL); 721 722 return tee_svc_copy_to_user(s, cancel, &c, sizeof(c)); 723 } 724 725 TEE_Result tee_svc_unmask_cancellation(bool *old_mask) 726 { 727 TEE_Result res; 728 struct tee_ta_session *s = NULL; 729 bool m; 730 731 res = tee_ta_get_current_session(&s); 732 if (res != TEE_SUCCESS) 733 return res; 734 735 m = s->cancel_mask; 736 s->cancel_mask = false; 737 return tee_svc_copy_to_user(s, old_mask, &m, sizeof(m)); 738 } 739 740 TEE_Result tee_svc_mask_cancellation(bool *old_mask) 741 { 742 TEE_Result res; 743 struct tee_ta_session *s = NULL; 744 bool m; 745 746 res = tee_ta_get_current_session(&s); 747 if (res != TEE_SUCCESS) 748 return res; 749 750 m = s->cancel_mask; 751 s->cancel_mask = true; 752 return tee_svc_copy_to_user(s, old_mask, &m, sizeof(m)); 753 } 754 755 TEE_Result tee_svc_wait(uint32_t timeout) 756 { 757 TEE_Result res = TEE_SUCCESS; 758 uint32_t mytime = 0; 759 struct tee_ta_session *s; 760 TEE_Time base_time; 761 TEE_Time current_time; 762 763 res = tee_ta_get_current_session(&s); 764 if (res != TEE_SUCCESS) 765 return res; 766 767 res = tee_time_get_sys_time(&base_time); 768 if (res != TEE_SUCCESS) 769 return res; 770 771 while (true) { 772 res = tee_time_get_sys_time(¤t_time); 773 if (res != TEE_SUCCESS) 774 return res; 775 776 if (session_is_cancelled(s, ¤t_time)) 777 return TEE_ERROR_CANCEL; 778 779 mytime = (current_time.seconds - base_time.seconds) * 1000 + 780 (int)current_time.millis - (int)base_time.millis; 781 if (mytime >= timeout) 782 return TEE_SUCCESS; 783 784 tee_wait_specific(timeout - mytime); 785 } 786 787 return res; 788 } 789 790 TEE_Result tee_svc_get_time(enum utee_time_category cat, TEE_Time *mytime) 791 { 792 TEE_Result res, res2; 793 struct tee_ta_session *s = NULL; 794 TEE_Time t; 795 796 res = tee_ta_get_current_session(&s); 797 if (res != TEE_SUCCESS) 798 return res; 799 800 switch (cat) { 801 case UTEE_TIME_CAT_SYSTEM: 802 res = tee_time_get_sys_time(&t); 803 break; 804 case UTEE_TIME_CAT_TA_PERSISTENT: 805 res = 806 tee_time_get_ta_time((const void *)&s->ctx->head->uuid, &t); 807 break; 808 case UTEE_TIME_CAT_REE: 809 res = tee_time_get_ree_time(&t); 810 break; 811 default: 812 res = TEE_ERROR_BAD_PARAMETERS; 813 break; 814 } 815 816 if (res == TEE_SUCCESS || res == TEE_ERROR_OVERFLOW) { 817 res2 = tee_svc_copy_to_user(s, mytime, &t, sizeof(t)); 818 if (res2 != TEE_SUCCESS) 819 res = res2; 820 } 821 822 return res; 823 } 824 825 TEE_Result tee_svc_set_ta_time(const TEE_Time *mytime) 826 { 827 TEE_Result res; 828 struct tee_ta_session *s = NULL; 829 TEE_Time t; 830 831 res = tee_ta_get_current_session(&s); 832 if (res != TEE_SUCCESS) 833 return res; 834 835 res = tee_svc_copy_from_user(s, &t, mytime, sizeof(t)); 836 if (res != TEE_SUCCESS) 837 return res; 838 839 return tee_time_set_ta_time((const void *)&s->ctx->head->uuid, &t); 840 } 841