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 <tee/tee_cryp_utl.h> 36 #include <mm/tee_mmu.h> 37 #include <mm/tee_mm.h> 38 #include <kernel/tee_rpc.h> 39 #include <kernel/tee_rpc_types.h> 40 #include <kernel/tee_time.h> 41 42 #include <user_ta_header.h> 43 #include <kernel/tee_core_trace.h> 44 #include <kernel/tee_kta_trace.h> 45 #include <kernel/chip_services.h> 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 %p to panicked", (void *)sess); 72 sess->ctx->panicked = 1; 73 sess->ctx->panic_code = code; 74 75 { 76 int *p = 0; 77 78 /* 79 * Force panicking. This memory error will be trapped by 80 * the error exception handler myErrorHandler() 81 */ 82 EMSG("Following 'DTLB exception in bundle'"); 83 EMSG(" is generated with code %d", code); 84 *p = 1; 85 } 86 } else { 87 DMSG("Panic called from unknown TA"); 88 } 89 } 90 91 TEE_Result tee_svc_reserved(void) 92 { 93 return TEE_ERROR_GENERIC; 94 } 95 96 uint32_t tee_svc_sys_dummy(uint32_t *a __unused) 97 { 98 DMSG("tee_svc_sys_dummy: a 0x%x", (unsigned int)a); 99 return 0; 100 } 101 102 uint32_t tee_svc_sys_dummy_7args(uint32_t a1 __unused, uint32_t a2 __unused, 103 uint32_t a3 __unused, uint32_t a4 __unused, 104 uint32_t a5 __unused, uint32_t a6 __unused, 105 uint32_t a7 __unused) 106 { 107 DMSG("tee_svc_sys_dummy_7args: 0x%x, 0x%x, 0x%x, 0x%x, 0x%x, %x, %x\n", 108 a1, a2, a3, a4, a5, a6, a7); 109 return 0; 110 } 111 112 uint32_t tee_svc_sys_nocall(void) 113 { 114 DMSG("No syscall"); 115 return 0x1; 116 } 117 118 TEE_Result tee_svc_sys_get_property(uint32_t prop, tee_uaddr_t buf, size_t blen) 119 { 120 static const char api_vers[] = "1.0"; 121 static const char descr[] = "Version N.N"; 122 /* 123 * Value 100 means: 124 * System time based on REE-controlled timers. Can be tampered by the 125 * REE. The implementation must still guarantee that the system time 126 * is monotonous, i.e., successive calls to TEE_GetSystemTime must 127 * return increasing values of the system time. 128 */ 129 static const uint32_t sys_time_prot_lvl = 100; 130 static const uint32_t ta_time_prot_lvl = 100; 131 struct tee_ta_session *sess; 132 TEE_Result res; 133 134 res = tee_ta_get_current_session(&sess); 135 if (res != TEE_SUCCESS) 136 return res; 137 138 switch (prop) { 139 case UTEE_PROP_TEE_API_VERSION: 140 if (blen < sizeof(api_vers)) 141 return TEE_ERROR_SHORT_BUFFER; 142 return tee_svc_copy_to_user(sess, (void *)buf, api_vers, 143 sizeof(api_vers)); 144 145 case UTEE_PROP_TEE_DESCR: 146 if (blen < sizeof(descr)) 147 return TEE_ERROR_SHORT_BUFFER; 148 return tee_svc_copy_to_user(sess, (void *)buf, descr, 149 sizeof(descr)); 150 151 case UTEE_PROP_TEE_DEV_ID: 152 { 153 TEE_UUID uuid; 154 const size_t nslen = 4; 155 uint8_t data[4 + 156 FVR_DIE_ID_NUM_REGS * sizeof(uint32_t)] = { 157 'S', 'T', 'E', 'E' }; 158 159 if (blen < sizeof(uuid)) 160 return TEE_ERROR_SHORT_BUFFER; 161 162 if (tee_otp_get_die_id 163 (data + nslen, sizeof(data) - nslen)) 164 return TEE_ERROR_BAD_STATE; 165 166 res = tee_hash_createdigest(TEE_ALG_SHA256, data, 167 sizeof(data), 168 (uint8_t *)&uuid, 169 sizeof(uuid)); 170 if (res != TEE_SUCCESS) 171 return TEE_ERROR_BAD_STATE; 172 173 /* 174 * Changes the random value into and UUID as specifiec 175 * in RFC 4122. The magic values are from the example 176 * code in the RFC. 177 * 178 * TEE_UUID is defined slightly different from the RFC, 179 * but close enough for our purpose. 180 */ 181 182 uuid.timeHiAndVersion &= 0x0fff; 183 uuid.timeHiAndVersion |= 5 << 12; 184 185 /* uuid.clock_seq_hi_and_reserved in the RFC */ 186 uuid.clockSeqAndNode[0] &= 0x3f; 187 uuid.clockSeqAndNode[0] |= 0x80; 188 189 return tee_svc_copy_to_user(sess, (void *)buf, &uuid, 190 sizeof(TEE_UUID)); 191 } 192 193 case UTEE_PROP_TEE_SYS_TIME_PROT_LEVEL: 194 if (blen < sizeof(sys_time_prot_lvl)) 195 return TEE_ERROR_SHORT_BUFFER; 196 return tee_svc_copy_to_user(sess, (void *)buf, 197 &sys_time_prot_lvl, 198 sizeof(sys_time_prot_lvl)); 199 200 case UTEE_PROP_TEE_TA_TIME_PROT_LEVEL: 201 if (blen < sizeof(ta_time_prot_lvl)) 202 return TEE_ERROR_SHORT_BUFFER; 203 return tee_svc_copy_to_user(sess, (void *)buf, 204 &ta_time_prot_lvl, 205 sizeof(ta_time_prot_lvl)); 206 207 case UTEE_PROP_CLIENT_ID: 208 { 209 if (blen < sizeof(TEE_Identity)) 210 return TEE_ERROR_SHORT_BUFFER; 211 212 return tee_svc_copy_to_user(sess, (void *)buf, 213 &sess->clnt_id, 214 sizeof(TEE_Identity)); 215 } 216 case UTEE_PROP_TA_APP_ID: 217 { 218 if (blen < sizeof(TEE_UUID)) 219 return TEE_ERROR_SHORT_BUFFER; 220 221 return tee_svc_copy_to_user(sess, (void *)buf, 222 &sess->ctx->head->uuid, 223 sizeof(TEE_UUID)); 224 } 225 226 default: 227 break; 228 } 229 return TEE_ERROR_NOT_IMPLEMENTED; 230 } 231 232 /* 233 * TA invokes some TA with parameter. 234 * If some parameters are memory references: 235 * - either the memref is inside TA private RAM: TA is not allowed to expose 236 * its private RAM: use a temporary memory buffer and copy the data. 237 * - or the memref is not in the TA private RAM: 238 * - if the memref was mapped to the TA, TA is allowed to expose it. 239 * - if so, converts memref virtual address into a physical address. 240 */ 241 static TEE_Result tee_svc_copy_param(struct tee_ta_session *sess, 242 struct tee_ta_session *called_sess, 243 uint32_t param_types, 244 TEE_Param callee_params[TEE_NUM_PARAMS], 245 struct tee_ta_param *param, 246 tee_paddr_t tmp_buf_pa[TEE_NUM_PARAMS], 247 tee_mm_entry_t **mm) 248 { 249 size_t n; 250 TEE_Result res; 251 size_t req_mem = 0; 252 size_t s; 253 uint8_t *dst = 0; 254 tee_paddr_t dst_pa, src_pa = 0; 255 bool ta_private_memref[TEE_NUM_PARAMS]; 256 257 /* fill 'param' input struct with caller params description buffer */ 258 param->types = param_types; 259 if (!callee_params) { 260 if (param->types != 0) 261 return TEE_ERROR_BAD_PARAMETERS; 262 memset(param->params, 0, sizeof(param->params)); 263 } else { 264 tee_svc_copy_from_user(sess, param->params, callee_params, 265 sizeof(param->params)); 266 } 267 268 if ((called_sess != NULL) && 269 (called_sess->ctx->static_ta == NULL) && 270 (called_sess->ctx->flags & TA_FLAG_USER_MODE) == 0) { 271 /* 272 * kernel TA, borrow the mapping of the calling 273 * during this call. 274 */ 275 called_sess->calling_sess = sess; 276 return TEE_SUCCESS; 277 } 278 279 for (n = 0; n < TEE_NUM_PARAMS; n++) { 280 281 ta_private_memref[n] = false; 282 283 switch (TEE_PARAM_TYPE_GET(param->types, n)) { 284 case TEE_PARAM_TYPE_MEMREF_INPUT: 285 case TEE_PARAM_TYPE_MEMREF_OUTPUT: 286 case TEE_PARAM_TYPE_MEMREF_INOUT: 287 if (param->params[n].memref.buffer == NULL) { 288 if (param->params[n].memref.size != 0) 289 return TEE_ERROR_BAD_PARAMETERS; 290 break; 291 } 292 /* uTA cannot expose its private memory */ 293 if (tee_mmu_is_vbuf_inside_ta_private(sess->ctx, 294 param->params[n].memref.buffer, 295 param->params[n].memref.size)) { 296 297 s = ROUNDUP(param->params[n].memref.size, 298 sizeof(uint32_t)); 299 /* Check overflow */ 300 if (req_mem + s < req_mem) 301 return TEE_ERROR_BAD_PARAMETERS; 302 req_mem += s; 303 ta_private_memref[n] = true; 304 break; 305 } 306 if (tee_mmu_is_vbuf_intersect_ta_private(sess->ctx, 307 param->params[n].memref.buffer, 308 param->params[n].memref.size)) 309 return TEE_ERROR_BAD_PARAMETERS; 310 311 if (tee_mmu_user_va2pa(sess->ctx, 312 (void *)param->params[n].memref.buffer, 313 &src_pa) != TEE_SUCCESS) 314 return TEE_ERROR_BAD_PARAMETERS; 315 316 param->param_attr[n] = tee_mmu_user_get_cache_attr( 317 sess->ctx, 318 (void *)param->params[n].memref.buffer); 319 320 param->params[n].memref.buffer = (void *)src_pa; 321 break; 322 323 default: 324 break; 325 } 326 } 327 328 if (req_mem == 0) 329 return TEE_SUCCESS; 330 331 /* Allocate section in secure DDR */ 332 *mm = tee_mm_alloc(&tee_mm_sec_ddr, req_mem); 333 if (*mm == NULL) { 334 DMSG("tee_mm_alloc TEE_ERROR_GENERIC"); 335 return TEE_ERROR_GENERIC; 336 } 337 338 /* Get the virtual address for the section in secure DDR */ 339 res = tee_mmu_kmap(tee_mm_get_smem(*mm), req_mem, &dst); 340 if (res != TEE_SUCCESS) 341 return res; 342 dst_pa = tee_mm_get_smem(*mm); 343 344 for (n = 0; n < 4; n++) { 345 346 if (ta_private_memref[n] == false) 347 continue; 348 349 s = ROUNDUP(param->params[n].memref.size, sizeof(uint32_t)); 350 351 switch (TEE_PARAM_TYPE_GET(param->types, n)) { 352 case TEE_PARAM_TYPE_MEMREF_INPUT: 353 case TEE_PARAM_TYPE_MEMREF_INOUT: 354 if (param->params[n].memref.buffer != NULL) { 355 res = tee_svc_copy_from_user(sess, dst, 356 param->params[n].memref.buffer, 357 param->params[n].memref.size); 358 if (res != TEE_SUCCESS) 359 return res; 360 param->param_attr[n] = 361 tee_mmu_kmap_get_cache_attr(dst); 362 param->params[n].memref.buffer = (void *)dst_pa; 363 tmp_buf_pa[n] = dst_pa; 364 dst += s; 365 dst_pa += s; 366 } 367 break; 368 369 case TEE_PARAM_TYPE_MEMREF_OUTPUT: 370 if (param->params[n].memref.buffer != NULL) { 371 param->param_attr[n] = 372 tee_mmu_kmap_get_cache_attr(dst); 373 param->params[n].memref.buffer = (void *)dst_pa; 374 tmp_buf_pa[n] = dst_pa; 375 dst += s; 376 dst_pa += s; 377 } 378 break; 379 380 default: 381 continue; 382 } 383 } 384 385 tee_mmu_kunmap(dst, req_mem); 386 387 return TEE_SUCCESS; 388 } 389 390 /* 391 * Back from execution of service: update parameters passed from TA: 392 * If some parameters were memory references: 393 * - either the memref was temporary: copy back data and update size 394 * - or it was the original TA memref: update only the size value. 395 */ 396 static TEE_Result tee_svc_update_out_param( 397 struct tee_ta_session *sess, 398 struct tee_ta_session *called_sess, 399 struct tee_ta_param *param, 400 tee_paddr_t tmp_buf_pa[TEE_NUM_PARAMS], 401 TEE_Param callee_params[TEE_NUM_PARAMS]) 402 { 403 size_t n; 404 bool have_private_mem_map = (called_sess == NULL) || 405 (called_sess->ctx->static_ta != NULL) || 406 ((called_sess->ctx->flags & TA_FLAG_USER_MODE) != 0); 407 408 tee_ta_set_current_session(sess); 409 410 for (n = 0; n < TEE_NUM_PARAMS; n++) { 411 switch (TEE_PARAM_TYPE_GET(param->types, n)) { 412 case TEE_PARAM_TYPE_MEMREF_OUTPUT: 413 case TEE_PARAM_TYPE_MEMREF_INOUT: 414 415 /* outside TA private => memref is valid, update size */ 416 if (!tee_mmu_is_vbuf_inside_ta_private(sess->ctx, 417 callee_params[n].memref.buffer, 418 param->params[n].memref.size)) { 419 callee_params[n].memref.size = 420 param->params[n].memref.size; 421 break; 422 } 423 424 /* 425 * If we called a kernel TA the parameters are in shared 426 * memory and no copy is needed. 427 */ 428 if (have_private_mem_map && 429 param->params[n].memref.size <= 430 callee_params[n].memref.size) { 431 uint8_t *src = 0; 432 TEE_Result res; 433 434 /* FIXME: TA_RAM is already mapped ! */ 435 res = tee_mmu_kmap(tmp_buf_pa[n], 436 param->params[n].memref.size, &src); 437 if (res != TEE_SUCCESS) 438 return TEE_ERROR_GENERIC; 439 440 res = tee_svc_copy_to_user(sess, 441 callee_params[n].memref. 442 buffer, src, 443 param->params[n]. 444 memref.size); 445 if (res != TEE_SUCCESS) 446 return res; 447 tee_mmu_kunmap(src, 448 param->params[n].memref.size); 449 450 } 451 callee_params[n].memref.size = param->params[n].memref.size; 452 break; 453 454 case TEE_PARAM_TYPE_VALUE_OUTPUT: 455 case TEE_PARAM_TYPE_VALUE_INOUT: 456 callee_params[n].value = param->params[n].value; 457 break; 458 459 default: 460 continue; 461 } 462 } 463 464 return TEE_SUCCESS; 465 } 466 467 /* Called when a TA calls an OpenSession on another TA */ 468 TEE_Result tee_svc_open_ta_session(const TEE_UUID *dest, 469 uint32_t cancel_req_to, uint32_t param_types, 470 TEE_Param params[4], 471 TEE_TASessionHandle *ta_sess, 472 uint32_t *ret_orig) 473 { 474 TEE_Result res; 475 uint32_t ret_o = TEE_ORIGIN_TEE; 476 struct tee_ta_session *s = NULL; 477 struct tee_ta_session *sess; 478 tee_mm_entry_t *mm_param = NULL; 479 480 TEE_UUID *uuid = malloc(sizeof(TEE_UUID)); 481 struct tee_ta_param *param = malloc(sizeof(struct tee_ta_param)); 482 TEE_Identity *clnt_id = malloc(sizeof(TEE_Identity)); 483 tee_paddr_t tmp_buf_pa[TEE_NUM_PARAMS]; 484 485 if (uuid == NULL || param == NULL || clnt_id == NULL) { 486 res = TEE_ERROR_OUT_OF_MEMORY; 487 goto out_free_only; 488 } 489 490 memset(param, 0, sizeof(struct tee_ta_param)); 491 492 res = tee_ta_get_current_session(&sess); 493 if (res != TEE_SUCCESS) 494 goto out_free_only; 495 496 res = tee_svc_copy_from_user(sess, uuid, dest, sizeof(TEE_UUID)); 497 if (res != TEE_SUCCESS) 498 goto function_exit; 499 500 clnt_id->login = TEE_LOGIN_TRUSTED_APP; 501 memcpy(&clnt_id->uuid, &sess->ctx->head->uuid, sizeof(TEE_UUID)); 502 503 res = tee_svc_copy_param(sess, NULL, param_types, params, param, 504 tmp_buf_pa, &mm_param); 505 if (res != TEE_SUCCESS) 506 goto function_exit; 507 508 /* 509 * Find session of a multi session TA or a static TA 510 * In such a case, there is no need to ask the supplicant for the TA 511 * code 512 */ 513 res = tee_ta_open_session(&ret_o, &s, &sess->ctx->open_sessions, uuid, 514 clnt_id, cancel_req_to, param); 515 if (res != TEE_SUCCESS) 516 goto function_exit; 517 518 res = tee_svc_update_out_param(sess, NULL, param, tmp_buf_pa, params); 519 520 function_exit: 521 tee_ta_set_current_session(sess); 522 523 if (mm_param != NULL) { 524 TEE_Result res2; 525 void *va = 0; 526 527 res2 = 528 tee_mmu_kmap_pa2va((void *)tee_mm_get_smem(mm_param), &va); 529 if (res2 == TEE_SUCCESS) 530 tee_mmu_kunmap(va, tee_mm_get_bytes(mm_param)); 531 } 532 tee_mm_free(mm_param); 533 tee_svc_copy_to_user(sess, ta_sess, &s, sizeof(s)); 534 tee_svc_copy_to_user(sess, ret_orig, &ret_o, sizeof(ret_o)); 535 536 out_free_only: 537 free(param); 538 free(uuid); 539 free(clnt_id); 540 return res; 541 } 542 543 TEE_Result tee_svc_close_ta_session(TEE_TASessionHandle ta_sess) 544 { 545 TEE_Result res; 546 struct tee_ta_session *sess; 547 548 res = tee_ta_get_current_session(&sess); 549 if (res != TEE_SUCCESS) 550 return res; 551 552 tee_ta_set_current_session(NULL); 553 554 res = 555 tee_ta_close_session((uint32_t)ta_sess, &sess->ctx->open_sessions); 556 tee_ta_set_current_session(sess); 557 return res; 558 } 559 560 TEE_Result tee_svc_invoke_ta_command(TEE_TASessionHandle ta_sess, 561 uint32_t cancel_req_to, uint32_t cmd_id, 562 uint32_t param_types, TEE_Param params[4], 563 uint32_t *ret_orig) 564 { 565 TEE_Result res; 566 uint32_t ret_o = TEE_ORIGIN_TEE; 567 struct tee_ta_param param = { 0 }; 568 struct tee_ta_session *sess; 569 struct tee_ta_session *called_sess = (struct tee_ta_session *)ta_sess; 570 tee_mm_entry_t *mm_param = NULL; 571 tee_paddr_t tmp_buf_pa[TEE_NUM_PARAMS]; 572 573 res = tee_ta_get_current_session(&sess); 574 if (res != TEE_SUCCESS) 575 return res; 576 577 res = 578 tee_ta_verify_session_pointer(called_sess, 579 &sess->ctx->open_sessions); 580 if (res != TEE_SUCCESS) 581 return res; 582 583 res = tee_svc_copy_param(sess, called_sess, param_types, params, 584 ¶m, tmp_buf_pa, &mm_param); 585 if (res != TEE_SUCCESS) 586 goto function_exit; 587 588 res = 589 tee_ta_invoke_command(&ret_o, called_sess, cancel_req_to, 590 cmd_id, ¶m); 591 if (res != TEE_SUCCESS) 592 goto function_exit; 593 594 res = tee_svc_update_out_param(sess, called_sess, ¶m, tmp_buf_pa, 595 params); 596 if (res != TEE_SUCCESS) 597 goto function_exit; 598 599 function_exit: 600 tee_ta_set_current_session(sess); 601 called_sess->calling_sess = NULL; /* clear eventual borrowed mapping */ 602 603 if (mm_param != NULL) { 604 TEE_Result res2; 605 void *va = 0; 606 607 res2 = 608 tee_mmu_kmap_pa2va((void *)tee_mm_get_smem(mm_param), &va); 609 if (res2 == TEE_SUCCESS) 610 tee_mmu_kunmap(va, tee_mm_get_bytes(mm_param)); 611 } 612 tee_mm_free(mm_param); 613 if (ret_orig) 614 tee_svc_copy_to_user(sess, ret_orig, &ret_o, sizeof(ret_o)); 615 return res; 616 } 617 618 TEE_Result tee_svc_check_access_rights(uint32_t flags, const void *buf, 619 size_t len) 620 { 621 TEE_Result res; 622 struct tee_ta_session *s; 623 624 res = tee_ta_get_current_session(&s); 625 if (res != TEE_SUCCESS) 626 return res; 627 628 return tee_mmu_check_access_rights(s->ctx, flags, (tee_uaddr_t)buf, 629 len); 630 } 631 632 TEE_Result tee_svc_copy_from_user(struct tee_ta_session *sess, void *kaddr, 633 const void *uaddr, size_t len) 634 { 635 TEE_Result res; 636 struct tee_ta_session *s; 637 638 if (sess == NULL) { 639 res = tee_ta_get_current_session(&s); 640 if (res != TEE_SUCCESS) 641 return res; 642 } else { 643 s = sess; 644 tee_ta_set_current_session(s); 645 } 646 res = 647 tee_mmu_check_access_rights(s->ctx, 648 TEE_MEMORY_ACCESS_READ | 649 TEE_MEMORY_ACCESS_ANY_OWNER, 650 (tee_uaddr_t)uaddr, len); 651 if (res != TEE_SUCCESS) 652 return res; 653 654 memcpy(kaddr, uaddr, len); 655 return TEE_SUCCESS; 656 } 657 658 TEE_Result tee_svc_copy_to_user(struct tee_ta_session *sess, void *uaddr, 659 const void *kaddr, size_t len) 660 { 661 TEE_Result res; 662 struct tee_ta_session *s; 663 664 if (sess == NULL) { 665 res = tee_ta_get_current_session(&s); 666 if (res != TEE_SUCCESS) 667 return res; 668 } else { 669 s = sess; 670 tee_ta_set_current_session(s); 671 } 672 673 res = 674 tee_mmu_check_access_rights(s->ctx, 675 TEE_MEMORY_ACCESS_WRITE | 676 TEE_MEMORY_ACCESS_ANY_OWNER, 677 (tee_uaddr_t)uaddr, len); 678 if (res != TEE_SUCCESS) 679 return res; 680 681 memcpy(uaddr, kaddr, len); 682 return TEE_SUCCESS; 683 } 684 685 static bool session_is_cancelled(struct tee_ta_session *s, TEE_Time *curr_time) 686 { 687 TEE_Time current_time; 688 689 if (s->cancel_mask) 690 return false; 691 692 if (s->cancel) 693 return true; 694 695 if (s->cancel_time.seconds == UINT32_MAX) 696 return false; 697 698 if (curr_time != NULL) 699 current_time = *curr_time; 700 else if (tee_time_get_sys_time(¤t_time) != TEE_SUCCESS) 701 return false; 702 703 if (current_time.seconds > s->cancel_time.seconds || 704 (current_time.seconds == s->cancel_time.seconds && 705 current_time.millis >= s->cancel_time.millis)) { 706 return true; 707 } 708 709 return false; 710 } 711 712 TEE_Result tee_svc_get_cancellation_flag(bool *cancel) 713 { 714 TEE_Result res; 715 struct tee_ta_session *s = NULL; 716 bool c; 717 718 res = tee_ta_get_current_session(&s); 719 if (res != TEE_SUCCESS) 720 return res; 721 722 c = session_is_cancelled(s, NULL); 723 724 return tee_svc_copy_to_user(s, cancel, &c, sizeof(c)); 725 } 726 727 TEE_Result tee_svc_unmask_cancellation(bool *old_mask) 728 { 729 TEE_Result res; 730 struct tee_ta_session *s = NULL; 731 bool m; 732 733 res = tee_ta_get_current_session(&s); 734 if (res != TEE_SUCCESS) 735 return res; 736 737 m = s->cancel_mask; 738 s->cancel_mask = false; 739 return tee_svc_copy_to_user(s, old_mask, &m, sizeof(m)); 740 } 741 742 TEE_Result tee_svc_mask_cancellation(bool *old_mask) 743 { 744 TEE_Result res; 745 struct tee_ta_session *s = NULL; 746 bool m; 747 748 res = tee_ta_get_current_session(&s); 749 if (res != TEE_SUCCESS) 750 return res; 751 752 m = s->cancel_mask; 753 s->cancel_mask = true; 754 return tee_svc_copy_to_user(s, old_mask, &m, sizeof(m)); 755 } 756 757 TEE_Result tee_svc_wait(uint32_t timeout) 758 { 759 TEE_Result res = TEE_SUCCESS; 760 uint32_t mytime = 0; 761 struct tee_ta_session *s; 762 TEE_Time base_time; 763 TEE_Time current_time; 764 765 res = tee_ta_get_current_session(&s); 766 if (res != TEE_SUCCESS) 767 return res; 768 769 res = tee_time_get_sys_time(&base_time); 770 if (res != TEE_SUCCESS) 771 return res; 772 773 while (true) { 774 res = tee_time_get_sys_time(¤t_time); 775 if (res != TEE_SUCCESS) 776 return res; 777 778 if (session_is_cancelled(s, ¤t_time)) 779 return TEE_ERROR_CANCEL; 780 781 mytime = (current_time.seconds - base_time.seconds) * 1000 + 782 (int)current_time.millis - (int)base_time.millis; 783 if (mytime >= timeout) 784 return TEE_SUCCESS; 785 786 tee_time_wait(timeout - mytime); 787 } 788 789 return res; 790 } 791 792 TEE_Result tee_svc_get_time(enum utee_time_category cat, TEE_Time *mytime) 793 { 794 TEE_Result res, res2; 795 struct tee_ta_session *s = NULL; 796 TEE_Time t; 797 798 res = tee_ta_get_current_session(&s); 799 if (res != TEE_SUCCESS) 800 return res; 801 802 switch (cat) { 803 case UTEE_TIME_CAT_SYSTEM: 804 res = tee_time_get_sys_time(&t); 805 break; 806 case UTEE_TIME_CAT_TA_PERSISTENT: 807 res = 808 tee_time_get_ta_time((const void *)&s->ctx->head->uuid, &t); 809 break; 810 case UTEE_TIME_CAT_REE: 811 res = tee_time_get_ree_time(&t); 812 break; 813 default: 814 res = TEE_ERROR_BAD_PARAMETERS; 815 break; 816 } 817 818 if (res == TEE_SUCCESS || res == TEE_ERROR_OVERFLOW) { 819 res2 = tee_svc_copy_to_user(s, mytime, &t, sizeof(t)); 820 if (res2 != TEE_SUCCESS) 821 res = res2; 822 } 823 824 return res; 825 } 826 827 TEE_Result tee_svc_set_ta_time(const TEE_Time *mytime) 828 { 829 TEE_Result res; 830 struct tee_ta_session *s = NULL; 831 TEE_Time t; 832 833 res = tee_ta_get_current_session(&s); 834 if (res != TEE_SUCCESS) 835 return res; 836 837 res = tee_svc_copy_from_user(s, &t, mytime, sizeof(t)); 838 if (res != TEE_SUCCESS) 839 return res; 840 841 return tee_time_set_ta_time((const void *)&s->ctx->head->uuid, &t); 842 } 843