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/util.h> 28 #include <kernel/tee_common_otp.h> 29 #include <kernel/tee_common.h> 30 #include <kernel/tee_compat.h> 31 #include <tee_api_types.h> 32 #include <kernel/tee_ta_manager.h> 33 #include <utee_types.h> 34 #include <tee/tee_svc.h> 35 #include <mm/tee_mmu.h> 36 #include <mm/tee_mm.h> 37 #include <kernel/tee_rpc.h> 38 #include <kernel/tee_rpc_types.h> 39 #include <kernel/tee_time.h> 40 41 #include <user_ta_header.h> 42 #include <kernel/tee_core_trace.h> 43 #include <kernel/tee_kta_trace.h> 44 #include <kernel/chip_services.h> 45 #include <tee/tee_hash.h> 46 47 48 void tee_svc_sys_log(const void *buf, size_t len) 49 { 50 char *kbuf; 51 52 if (len == 0) 53 return; 54 55 kbuf = malloc(len); 56 if (kbuf == NULL) 57 return; 58 *kbuf = '\0'; 59 60 /* log as Info/Raw traces */ 61 if (tee_svc_copy_from_user(NULL, kbuf, buf, len) == TEE_SUCCESS) 62 ATAMSG_RAW("%s", kbuf); 63 64 free(kbuf); 65 } 66 67 void tee_svc_sys_panic(uint32_t code) 68 { 69 struct tee_ta_session *sess; 70 71 if (tee_ta_get_current_session(&sess) == TEE_SUCCESS) { 72 EMSG("Set session 0x%x to panicked", sess); 73 sess->ctx->panicked = 1; 74 sess->ctx->panic_code = code; 75 76 { 77 /* 78 * Force panicking. This memory error will be trapped by 79 * the error exception handler myErrorHandler() 80 */ 81 EMSG("Following 'DTLB exception in bundle'"); 82 EMSG(" is generated with code %d", code); 83 int *p = 0; 84 *p = 1; 85 } 86 } else { 87 DMSG("Panic called from unknown TA"); 88 } 89 } 90 91 uint32_t tee_svc_sys_dummy(uint32_t *a) 92 { 93 DMSG("tee_svc_sys_dummy: a 0x%x", (unsigned int)a); 94 return 0; 95 } 96 97 uint32_t tee_svc_sys_dummy_7args(uint32_t a1, uint32_t a2, uint32_t a3, 98 uint32_t a4, uint32_t a5, uint32_t a6, 99 uint32_t a7) 100 { 101 DMSG("tee_svc_sys_dummy_7args: 0x%x, 0x%x, 0x%x, 0x%x, 0x%x, %x, %x\n", 102 a1, a2, a3, a4, a5, a6, a7); 103 return 0; 104 } 105 106 uint32_t tee_svc_sys_nocall(void) 107 { 108 DMSG("No syscall"); 109 return 0x1; 110 } 111 112 TEE_Result tee_svc_sys_get_property(uint32_t prop, tee_uaddr_t buf, size_t blen) 113 { 114 static const char api_vers[] = "1.0"; 115 static const char descr[] = "Version N.N"; 116 /* 117 * Value 100 means: 118 * System time based on REE-controlled timers. Can be tampered by the 119 * REE. The implementation must still guarantee that the system time 120 * is monotonous, i.e., successive calls to TEE_GetSystemTime must 121 * return increasing values of the system time. 122 */ 123 static const uint32_t sys_time_prot_lvl = 100; 124 static const uint32_t ta_time_prot_lvl = 100; 125 struct tee_ta_session *sess; 126 TEE_Result res; 127 128 res = tee_ta_get_current_session(&sess); 129 if (res != TEE_SUCCESS) 130 return res; 131 132 switch (prop) { 133 case UTEE_PROP_TEE_API_VERSION: 134 if (blen < sizeof(api_vers)) 135 return TEE_ERROR_SHORT_BUFFER; 136 return tee_svc_copy_to_user(sess, (void *)buf, api_vers, 137 sizeof(api_vers)); 138 139 case UTEE_PROP_TEE_DESCR: 140 if (blen < sizeof(descr)) 141 return TEE_ERROR_SHORT_BUFFER; 142 return tee_svc_copy_to_user(sess, (void *)buf, descr, 143 sizeof(descr)); 144 145 case UTEE_PROP_TEE_DEV_ID: 146 { 147 TEE_UUID uuid; 148 const size_t nslen = 4; 149 uint8_t data[4 + 150 FVR_DIE_ID_NUM_REGS * sizeof(uint32_t)] = { 151 'S', 'T', 'E', 'E' }; 152 153 if (blen < sizeof(uuid)) 154 return TEE_ERROR_SHORT_BUFFER; 155 156 if (tee_otp_get_die_id 157 (data + nslen, sizeof(data) - nslen)) 158 return TEE_ERROR_BAD_STATE; 159 160 res = tee_hash_createdigest( 161 TEE_ALG_SHA256, 162 data, sizeof(data), 163 (uint8_t *)&uuid, sizeof(uuid)); 164 if (res != TEE_SUCCESS) 165 return TEE_ERROR_BAD_STATE; 166 167 /* 168 * Changes the random value into and UUID as specifiec 169 * in RFC 4122. The magic values are from the example 170 * code in the RFC. 171 * 172 * TEE_UUID is defined slightly different from the RFC, 173 * but close enough for our purpose. 174 */ 175 176 uuid.timeHiAndVersion &= 0x0fff; 177 uuid.timeHiAndVersion |= 5 << 12; 178 179 /* uuid.clock_seq_hi_and_reserved in the RFC */ 180 uuid.clockSeqAndNode[0] &= 0x3f; 181 uuid.clockSeqAndNode[0] |= 0x80; 182 183 return tee_svc_copy_to_user(sess, (void *)buf, &uuid, 184 sizeof(TEE_UUID)); 185 } 186 187 case UTEE_PROP_TEE_SYS_TIME_PROT_LEVEL: 188 if (blen < sizeof(sys_time_prot_lvl)) 189 return TEE_ERROR_SHORT_BUFFER; 190 return tee_svc_copy_to_user(sess, (void *)buf, 191 &sys_time_prot_lvl, 192 sizeof(sys_time_prot_lvl)); 193 194 case UTEE_PROP_TEE_TA_TIME_PROT_LEVEL: 195 if (blen < sizeof(ta_time_prot_lvl)) 196 return TEE_ERROR_SHORT_BUFFER; 197 return tee_svc_copy_to_user(sess, (void *)buf, 198 &ta_time_prot_lvl, 199 sizeof(ta_time_prot_lvl)); 200 201 case UTEE_PROP_CLIENT_ID: 202 { 203 if (blen < sizeof(TEE_Identity)) 204 return TEE_ERROR_SHORT_BUFFER; 205 206 return tee_svc_copy_to_user(sess, (void *)buf, 207 &sess->clnt_id, 208 sizeof(TEE_Identity)); 209 } 210 case UTEE_PROP_TA_APP_ID: 211 { 212 if (blen < sizeof(TEE_UUID)) 213 return TEE_ERROR_SHORT_BUFFER; 214 215 return tee_svc_copy_to_user(sess, (void *)buf, 216 &sess->ctx->head->uuid, 217 sizeof(TEE_UUID)); 218 } 219 220 default: 221 break; 222 } 223 return TEE_ERROR_NOT_IMPLEMENTED; 224 } 225 226 /* 227 * TA invokes some TA with parameter. 228 * If some parameters are memory references: 229 * - either the memref is inside TA private RAM: TA is not allowed to expose 230 * its private RAM: use a temporary memory buffer and copy the data. 231 * - or the memref is not in the TA private RAM: 232 * - if the memref was mapped to the TA, TA is allowed to expose it. 233 * - if so, converts memref virtual address into a physical address. 234 */ 235 static TEE_Result tee_svc_copy_param(struct tee_ta_session *sess, 236 struct tee_ta_session *called_sess, 237 uint32_t param_types, 238 TEE_Param params[TEE_NUM_PARAMS], 239 struct tee_ta_param *param, 240 tee_paddr_t tmp_buf_pa[TEE_NUM_PARAMS], 241 tee_mm_entry_t **mm) 242 { 243 size_t n; 244 TEE_Result res; 245 size_t req_mem = 0; 246 size_t s; 247 uint8_t *dst = 0; 248 tee_paddr_t dst_pa, src_pa = 0; 249 bool ta_private_memref[TEE_NUM_PARAMS]; 250 251 param->types = param_types; 252 if (params == NULL) { 253 if (param->types != 0) 254 return TEE_ERROR_BAD_PARAMETERS; 255 memset(param->params, 0, sizeof(param->params)); 256 } else { 257 tee_svc_copy_from_user(sess, param->params, params, 258 sizeof(param->params)); 259 } 260 261 if ((called_sess != NULL) && 262 (called_sess->ctx->static_ta == NULL) && 263 (called_sess->ctx->flags & TA_FLAG_USER_MODE) == 0) { 264 /* 265 * kernel TA, borrow the mapping of the calling 266 * during this call. 267 */ 268 called_sess->calling_sess = sess; 269 return TEE_SUCCESS; 270 } 271 272 for (n = 0; n < TEE_NUM_PARAMS; n++) { 273 274 ta_private_memref[n] = false; 275 276 switch (TEE_PARAM_TYPE_GET(param->types, n)) { 277 case TEE_PARAM_TYPE_MEMREF_INPUT: 278 case TEE_PARAM_TYPE_MEMREF_OUTPUT: 279 case TEE_PARAM_TYPE_MEMREF_INOUT: 280 if (param->params[n].memref.buffer == NULL) { 281 if (param->params[n].memref.size != 0) 282 return TEE_ERROR_BAD_PARAMETERS; 283 break; 284 } 285 /* uTA cannot expose its private memory */ 286 if (tee_mmu_is_vbuf_inside_ta_private(sess->ctx, 287 (uintptr_t)param->params[n].memref.buffer, 288 param->params[n].memref.size)) { 289 290 s = ROUNDUP(param->params[n].memref.size, 291 sizeof(uint32_t)); 292 /* Check overflow */ 293 if (req_mem + s < req_mem) 294 return TEE_ERROR_BAD_PARAMETERS; 295 req_mem += s; 296 ta_private_memref[n] = true; 297 break; 298 } 299 if (!tee_mmu_is_vbuf_outside_ta_private(sess->ctx, 300 (uintptr_t)param->params[n].memref.buffer, 301 param->params[n].memref.size)) 302 return TEE_ERROR_BAD_PARAMETERS; 303 304 if (tee_mmu_user_va2pa(sess->ctx, 305 (void *)param->params[n].memref.buffer, 306 (void **)&src_pa) != TEE_SUCCESS) 307 return TEE_ERROR_BAD_PARAMETERS; 308 309 param->param_attr[n] = tee_mmu_user_get_cache_attr( 310 sess->ctx, 311 (void *)param->params[n].memref.buffer); 312 313 param->params[n].memref.buffer = (void *)src_pa; 314 break; 315 316 default: 317 break; 318 } 319 } 320 321 if (req_mem == 0) 322 return TEE_SUCCESS; 323 324 /* Allocate section in secure DDR */ 325 *mm = tee_mm_alloc(&tee_mm_sec_ddr, req_mem); 326 if (*mm == NULL) { 327 DMSG("tee_mm_alloc TEE_ERROR_GENERIC"); 328 return TEE_ERROR_GENERIC; 329 } 330 331 /* Get the virtual address for the section in secure DDR */ 332 res = tee_mmu_kmap(tee_mm_get_smem(*mm), req_mem, &dst); 333 if (res != TEE_SUCCESS) 334 return res; 335 dst_pa = tee_mm_get_smem(*mm); 336 337 for (n = 0; n < 4; n++) { 338 339 if (ta_private_memref[n] == false) 340 continue; 341 342 s = ROUNDUP(param->params[n].memref.size, sizeof(uint32_t)); 343 344 switch (TEE_PARAM_TYPE_GET(param->types, n)) { 345 case TEE_PARAM_TYPE_MEMREF_INPUT: 346 case TEE_PARAM_TYPE_MEMREF_INOUT: 347 if (param->params[n].memref.buffer != NULL) { 348 res = tee_svc_copy_from_user(sess, dst, 349 param->params[n]. 350 memref.buffer, 351 param->params[n]. 352 memref.size); 353 if (res != TEE_SUCCESS) 354 return res; 355 356 param->param_attr[n] = 357 tee_mmu_kmap_get_cache_attr(dst); 358 param->params[n].memref.buffer = (void *)dst_pa; 359 tmp_buf_pa[n] = dst_pa; 360 dst += s; 361 dst_pa += s; 362 } 363 break; 364 365 case TEE_PARAM_TYPE_MEMREF_OUTPUT: 366 if (param->params[n].memref.buffer != NULL) { 367 param->param_attr[n] = 368 tee_mmu_kmap_get_cache_attr(dst); 369 param->params[n].memref.buffer = (void *)dst_pa; 370 tmp_buf_pa[n] = dst_pa; 371 dst += s; 372 dst_pa += s; 373 } 374 break; 375 376 default: 377 continue; 378 } 379 } 380 381 tee_mmu_kunmap(dst, req_mem); 382 383 return TEE_SUCCESS; 384 } 385 386 /* 387 * Back from execution of service: update parameters passed from TA: 388 * If some parameters were memory references: 389 * - either the memref was temporary: copy back data and update size 390 * - or it was the original TA memref: update only the size value. 391 */ 392 static TEE_Result tee_svc_update_out_param( 393 struct tee_ta_session *sess, 394 struct tee_ta_session *called_sess, 395 struct tee_ta_param *param, 396 tee_paddr_t tmp_buf_pa[TEE_NUM_PARAMS], 397 TEE_Param params[TEE_NUM_PARAMS]) 398 { 399 size_t n; 400 bool have_private_mem_map = (called_sess == NULL) || 401 (called_sess->ctx->static_ta != NULL) || 402 ((called_sess->ctx->flags & TA_FLAG_USER_MODE) != 0); 403 404 tee_ta_set_current_session(sess); 405 406 for (n = 0; n < TEE_NUM_PARAMS; n++) { 407 switch (TEE_PARAM_TYPE_GET(param->types, n)) { 408 case TEE_PARAM_TYPE_MEMREF_OUTPUT: 409 case TEE_PARAM_TYPE_MEMREF_INOUT: 410 411 /* outside TA private => memref is valid, update size */ 412 if (!tee_mmu_is_vbuf_inside_ta_private(sess->ctx, 413 (uintptr_t)params[n].memref.buffer, 414 param->params[n].memref.size)) { 415 params[n].memref.size = 416 param->params[n].memref.size; 417 break; 418 } 419 420 /* 421 * If we called a kernel TA the parameters are in shared 422 * memory and no copy is needed. 423 */ 424 if (have_private_mem_map && 425 param->params[n].memref.size <= 426 params[n].memref.size) { 427 uint8_t *src = 0; 428 TEE_Result res; 429 430 /* FIXME: TA_RAM is already mapped ! */ 431 res = tee_mmu_kmap(tmp_buf_pa[n], 432 param->params[n].memref.size, &src); 433 if (res != TEE_SUCCESS) 434 return TEE_ERROR_GENERIC; 435 436 res = tee_svc_copy_to_user(sess, 437 params[n].memref. 438 buffer, src, 439 param->params[n]. 440 memref.size); 441 if (res != TEE_SUCCESS) 442 return res; 443 tee_mmu_kunmap(src, 444 param->params[n].memref.size); 445 446 } 447 params[n].memref.size = param->params[n].memref.size; 448 break; 449 450 case TEE_PARAM_TYPE_VALUE_OUTPUT: 451 case TEE_PARAM_TYPE_VALUE_INOUT: 452 params[n].value = param->params[n].value; 453 break; 454 455 default: 456 continue; 457 } 458 } 459 460 return TEE_SUCCESS; 461 } 462 463 /* Called when a TA calls an OpenSession on another TA */ 464 TEE_Result tee_svc_open_ta_session(const TEE_UUID *dest, 465 uint32_t cancel_req_to, uint32_t param_types, 466 TEE_Param params[4], 467 TEE_TASessionHandle *ta_sess, 468 uint32_t *ret_orig) 469 { 470 TEE_Result res; 471 uint32_t ret_o = TEE_ORIGIN_TEE; 472 struct tee_ta_session *s = NULL; 473 struct tee_ta_session *sess; 474 tee_mm_entry_t *mm_param = NULL; 475 476 TEE_UUID *uuid = malloc(sizeof(TEE_UUID)); 477 struct tee_ta_param *param = malloc(sizeof(struct tee_ta_param)); 478 TEE_Identity *clnt_id = malloc(sizeof(TEE_Identity)); 479 tee_paddr_t tmp_buf_pa[TEE_NUM_PARAMS]; 480 481 if (uuid == NULL || param == NULL || clnt_id == NULL) { 482 res = TEE_ERROR_OUT_OF_MEMORY; 483 goto out_free_only; 484 } 485 486 memset(param, 0, sizeof(struct tee_ta_param)); 487 488 res = tee_ta_get_current_session(&sess); 489 if (res != TEE_SUCCESS) 490 goto out_free_only; 491 492 res = tee_svc_copy_from_user(sess, uuid, dest, sizeof(TEE_UUID)); 493 if (res != TEE_SUCCESS) 494 goto function_exit; 495 496 clnt_id->login = TEE_LOGIN_TRUSTED_APP; 497 memcpy(&clnt_id->uuid, &sess->ctx->head->uuid, sizeof(TEE_UUID)); 498 499 res = tee_svc_copy_param(sess, NULL, param_types, params, param, 500 tmp_buf_pa, &mm_param); 501 if (res != TEE_SUCCESS) 502 goto function_exit; 503 504 /* 505 * Find session of a multi session TA or a static TA 506 * In such a case, there is no need to ask the supplicant for the TA 507 * code 508 */ 509 res = tee_ta_open_session(&ret_o, &s, &sess->ctx->open_sessions, uuid, 510 clnt_id, cancel_req_to, param); 511 if (res != TEE_SUCCESS) 512 goto function_exit; 513 514 res = tee_svc_update_out_param(sess, NULL, param, tmp_buf_pa, params); 515 if (res != TEE_SUCCESS) 516 goto function_exit; 517 518 function_exit: 519 tee_ta_set_current_session(sess); 520 521 if (mm_param != NULL) { 522 TEE_Result res2; 523 void *va = 0; 524 525 res2 = 526 tee_mmu_kmap_pa2va((void *)tee_mm_get_smem(mm_param), &va); 527 if (res2 == TEE_SUCCESS) 528 tee_mmu_kunmap(va, tee_mm_get_bytes(mm_param)); 529 } 530 tee_mm_free(mm_param); 531 tee_svc_copy_to_user(sess, ta_sess, &s, sizeof(s)); 532 tee_svc_copy_to_user(sess, ret_orig, &ret_o, sizeof(ret_o)); 533 534 out_free_only: 535 free(param); 536 free(uuid); 537 free(clnt_id); 538 return res; 539 } 540 541 TEE_Result tee_svc_close_ta_session(TEE_TASessionHandle ta_sess) 542 { 543 TEE_Result res; 544 struct tee_ta_session *sess; 545 546 res = tee_ta_get_current_session(&sess); 547 if (res != TEE_SUCCESS) 548 return res; 549 550 tee_ta_set_current_session(NULL); 551 552 res = 553 tee_ta_close_session((uint32_t)ta_sess, &sess->ctx->open_sessions); 554 tee_ta_set_current_session(sess); 555 return res; 556 } 557 558 TEE_Result tee_svc_invoke_ta_command(TEE_TASessionHandle ta_sess, 559 uint32_t cancel_req_to, uint32_t cmd_id, 560 uint32_t param_types, TEE_Param params[4], 561 uint32_t *ret_orig) 562 { 563 TEE_Result res; 564 uint32_t ret_o = TEE_ORIGIN_TEE; 565 struct tee_ta_param param = { 0 }; 566 TEE_Identity clnt_id; 567 struct tee_ta_session *sess; 568 struct tee_ta_session *called_sess = (struct tee_ta_session *)ta_sess; 569 tee_mm_entry_t *mm_param = NULL; 570 tee_paddr_t tmp_buf_pa[TEE_NUM_PARAMS]; 571 572 res = tee_ta_get_current_session(&sess); 573 if (res != TEE_SUCCESS) 574 return res; 575 576 res = 577 tee_ta_verify_session_pointer(called_sess, 578 &sess->ctx->open_sessions); 579 if (res != TEE_SUCCESS) 580 return res; 581 582 res = tee_svc_copy_param(sess, called_sess, param_types, params, 583 ¶m, tmp_buf_pa, &mm_param); 584 if (res != TEE_SUCCESS) 585 goto function_exit; 586 587 res = 588 tee_ta_invoke_command(&ret_o, called_sess, &clnt_id, cancel_req_to, 589 cmd_id, ¶m); 590 if (res != TEE_SUCCESS) 591 goto function_exit; 592 593 res = tee_svc_update_out_param(sess, called_sess, ¶m, tmp_buf_pa, 594 params); 595 if (res != TEE_SUCCESS) 596 goto function_exit; 597 598 function_exit: 599 tee_ta_set_current_session(sess); 600 called_sess->calling_sess = NULL; /* clear eventual borrowed mapping */ 601 602 if (mm_param != NULL) { 603 TEE_Result res2; 604 void *va = 0; 605 606 res2 = 607 tee_mmu_kmap_pa2va((void *)tee_mm_get_smem(mm_param), &va); 608 if (res2 == TEE_SUCCESS) 609 tee_mmu_kunmap(va, tee_mm_get_bytes(mm_param)); 610 } 611 tee_mm_free(mm_param); 612 if (ret_orig) 613 tee_svc_copy_to_user(sess, ret_orig, &ret_o, sizeof(ret_o)); 614 return res; 615 } 616 617 TEE_Result tee_svc_check_access_rights(uint32_t flags, const void *buf, 618 size_t len) 619 { 620 TEE_Result res; 621 struct tee_ta_session *s; 622 623 res = tee_ta_get_current_session(&s); 624 if (res != TEE_SUCCESS) 625 return res; 626 627 return tee_mmu_check_access_rights(s->ctx, flags, (tee_uaddr_t)buf, 628 len); 629 } 630 631 TEE_Result tee_svc_copy_from_user(struct tee_ta_session *sess, void *kaddr, 632 const void *uaddr, size_t len) 633 { 634 TEE_Result res; 635 struct tee_ta_session *s; 636 637 if (sess == NULL) { 638 res = tee_ta_get_current_session(&s); 639 if (res != TEE_SUCCESS) 640 return res; 641 } else { 642 s = sess; 643 tee_ta_set_current_session(s); 644 } 645 res = 646 tee_mmu_check_access_rights(s->ctx, 647 TEE_MEMORY_ACCESS_READ | 648 TEE_MEMORY_ACCESS_ANY_OWNER, 649 (tee_uaddr_t)uaddr, len); 650 if (res != TEE_SUCCESS) 651 return res; 652 653 memcpy(kaddr, uaddr, len); 654 return TEE_SUCCESS; 655 } 656 657 TEE_Result tee_svc_copy_to_user(struct tee_ta_session *sess, void *uaddr, 658 const void *kaddr, size_t len) 659 { 660 TEE_Result res; 661 struct tee_ta_session *s; 662 663 if (sess == NULL) { 664 res = tee_ta_get_current_session(&s); 665 if (res != TEE_SUCCESS) 666 return res; 667 } else { 668 s = sess; 669 tee_ta_set_current_session(s); 670 } 671 672 res = 673 tee_mmu_check_access_rights(s->ctx, 674 TEE_MEMORY_ACCESS_WRITE | 675 TEE_MEMORY_ACCESS_ANY_OWNER, 676 (tee_uaddr_t)uaddr, len); 677 if (res != TEE_SUCCESS) 678 return res; 679 680 memcpy(uaddr, kaddr, len); 681 return TEE_SUCCESS; 682 } 683 684 static bool session_is_cancelled(struct tee_ta_session *s, TEE_Time *curr_time) 685 { 686 TEE_Time current_time; 687 688 if (s->cancel_mask) 689 return false; 690 691 if (s->cancel) 692 return true; 693 694 if (s->cancel_time.seconds == UINT32_MAX) 695 return false; 696 697 if (curr_time != NULL) 698 current_time = *curr_time; 699 else if (tee_time_get_sys_time(¤t_time) != TEE_SUCCESS) 700 return false; 701 702 if (current_time.seconds > s->cancel_time.seconds || 703 (current_time.seconds == s->cancel_time.seconds && 704 current_time.millis >= s->cancel_time.millis)) { 705 return true; 706 } 707 708 return false; 709 } 710 711 TEE_Result tee_svc_get_cancellation_flag(bool *cancel) 712 { 713 TEE_Result res; 714 struct tee_ta_session *s = NULL; 715 bool c; 716 717 res = tee_ta_get_current_session(&s); 718 if (res != TEE_SUCCESS) 719 return res; 720 721 c = session_is_cancelled(s, NULL); 722 723 return tee_svc_copy_to_user(s, cancel, &c, sizeof(c)); 724 } 725 726 TEE_Result tee_svc_unmask_cancellation(bool *old_mask) 727 { 728 TEE_Result res; 729 struct tee_ta_session *s = NULL; 730 bool m; 731 732 res = tee_ta_get_current_session(&s); 733 if (res != TEE_SUCCESS) 734 return res; 735 736 m = s->cancel_mask; 737 s->cancel_mask = false; 738 return tee_svc_copy_to_user(s, old_mask, &m, sizeof(m)); 739 } 740 741 TEE_Result tee_svc_mask_cancellation(bool *old_mask) 742 { 743 TEE_Result res; 744 struct tee_ta_session *s = NULL; 745 bool m; 746 747 res = tee_ta_get_current_session(&s); 748 if (res != TEE_SUCCESS) 749 return res; 750 751 m = s->cancel_mask; 752 s->cancel_mask = true; 753 return tee_svc_copy_to_user(s, old_mask, &m, sizeof(m)); 754 } 755 756 TEE_Result tee_svc_wait(uint32_t timeout) 757 { 758 TEE_Result res = TEE_SUCCESS; 759 uint32_t mytime = 0; 760 struct tee_ta_session *s; 761 TEE_Time base_time; 762 TEE_Time current_time; 763 764 res = tee_ta_get_current_session(&s); 765 if (res != TEE_SUCCESS) 766 return res; 767 768 res = tee_time_get_sys_time(&base_time); 769 if (res != TEE_SUCCESS) 770 return res; 771 772 while (true) { 773 res = tee_time_get_sys_time(¤t_time); 774 if (res != TEE_SUCCESS) 775 return res; 776 777 if (session_is_cancelled(s, ¤t_time)) 778 return TEE_ERROR_CANCEL; 779 780 mytime = (current_time.seconds - base_time.seconds) * 1000 + 781 (int)current_time.millis - (int)base_time.millis; 782 if (mytime >= timeout) 783 return TEE_SUCCESS; 784 785 tee_time_wait(timeout - mytime); 786 } 787 788 return res; 789 } 790 791 TEE_Result tee_svc_get_time(enum utee_time_category cat, TEE_Time *mytime) 792 { 793 TEE_Result res, res2; 794 struct tee_ta_session *s = NULL; 795 TEE_Time t; 796 797 res = tee_ta_get_current_session(&s); 798 if (res != TEE_SUCCESS) 799 return res; 800 801 switch (cat) { 802 case UTEE_TIME_CAT_SYSTEM: 803 res = tee_time_get_sys_time(&t); 804 break; 805 case UTEE_TIME_CAT_TA_PERSISTENT: 806 res = 807 tee_time_get_ta_time((const void *)&s->ctx->head->uuid, &t); 808 break; 809 case UTEE_TIME_CAT_REE: 810 res = tee_time_get_ree_time(&t); 811 break; 812 default: 813 res = TEE_ERROR_BAD_PARAMETERS; 814 break; 815 } 816 817 if (res == TEE_SUCCESS || res == TEE_ERROR_OVERFLOW) { 818 res2 = tee_svc_copy_to_user(s, mytime, &t, sizeof(t)); 819 if (res2 != TEE_SUCCESS) 820 res = res2; 821 } 822 823 return res; 824 } 825 826 TEE_Result tee_svc_set_ta_time(const TEE_Time *mytime) 827 { 828 TEE_Result res; 829 struct tee_ta_session *s = NULL; 830 TEE_Time t; 831 832 res = tee_ta_get_current_session(&s); 833 if (res != TEE_SUCCESS) 834 return res; 835 836 res = tee_svc_copy_from_user(s, &t, mytime, sizeof(t)); 837 if (res != TEE_SUCCESS) 838 return res; 839 840 return tee_time_set_ta_time((const void *)&s->ctx->head->uuid, &t); 841 } 842