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 <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 <trace.h> 44 #include <kernel/trace_ta.h> 45 #include <kernel/chip_services.h> 46 47 #if (CFG_TRACE_LEVEL == TRACE_FLOW) && defined(CFG_TEE_CORE_TA_TRACE) 48 void tee_svc_trace_syscall(int num) 49 { 50 /* #0 is syscall return, not really interesting */ 51 if (num == 0) 52 return; 53 FMSG("syscall #%d", num); 54 } 55 #endif 56 57 void tee_svc_sys_log(const void *buf __unused, size_t len __unused) 58 { 59 #ifdef CFG_TEE_CORE_TA_TRACE 60 char *kbuf; 61 62 if (len == 0) 63 return; 64 65 kbuf = malloc(len); 66 if (kbuf == NULL) 67 return; 68 *kbuf = '\0'; 69 70 /* log as Info/Raw traces */ 71 if (tee_svc_copy_from_user(NULL, kbuf, buf, len) == TEE_SUCCESS) 72 TAMSG_RAW("%.*s", (int)len, kbuf); 73 74 free(kbuf); 75 #endif 76 } 77 78 TEE_Result tee_svc_reserved(void) 79 { 80 return TEE_ERROR_GENERIC; 81 } 82 83 TEE_Result tee_svc_not_supported(void) 84 { 85 return TEE_ERROR_NOT_SUPPORTED; 86 } 87 88 uint32_t tee_svc_sys_dummy(uint32_t *a __unused) 89 { 90 DMSG("tee_svc_sys_dummy: a 0x%x", (unsigned int)a); 91 return 0; 92 } 93 94 uint32_t tee_svc_sys_dummy_7args(uint32_t a1 __unused, uint32_t a2 __unused, 95 uint32_t a3 __unused, uint32_t a4 __unused, 96 uint32_t a5 __unused, uint32_t a6 __unused, 97 uint32_t a7 __unused) 98 { 99 DMSG("tee_svc_sys_dummy_7args: 0x%x, 0x%x, 0x%x, 0x%x, 0x%x, %x, %x\n", 100 a1, a2, a3, a4, a5, a6, a7); 101 return 0; 102 } 103 104 uint32_t tee_svc_sys_nocall(void) 105 { 106 DMSG("No syscall"); 107 return 0x1; 108 } 109 110 TEE_Result tee_svc_sys_get_property(uint32_t prop, tee_uaddr_t buf, size_t blen) 111 { 112 static const char api_vers[] = "1.0"; 113 static const char descr[] = "Version N.N"; 114 /* 115 * Value 100 means: 116 * System time based on REE-controlled timers. Can be tampered by the 117 * REE. The implementation must still guarantee that the system time 118 * is monotonous, i.e., successive calls to TEE_GetSystemTime must 119 * return increasing values of the system time. 120 */ 121 static const uint32_t sys_time_prot_lvl = 100; 122 static const uint32_t ta_time_prot_lvl = 100; 123 struct tee_ta_session *sess; 124 TEE_Result res; 125 126 res = tee_ta_get_current_session(&sess); 127 if (res != TEE_SUCCESS) 128 return res; 129 130 switch (prop) { 131 case UTEE_PROP_TEE_API_VERSION: 132 if (blen < sizeof(api_vers)) 133 return TEE_ERROR_SHORT_BUFFER; 134 return tee_svc_copy_to_user(sess, (void *)buf, api_vers, 135 sizeof(api_vers)); 136 137 case UTEE_PROP_TEE_DESCR: 138 if (blen < sizeof(descr)) 139 return TEE_ERROR_SHORT_BUFFER; 140 return tee_svc_copy_to_user(sess, (void *)buf, descr, 141 sizeof(descr)); 142 143 case UTEE_PROP_TEE_DEV_ID: 144 { 145 TEE_UUID uuid; 146 const size_t nslen = 4; 147 uint8_t data[4 + 148 FVR_DIE_ID_NUM_REGS * sizeof(uint32_t)] = { 149 'S', 'T', 'E', 'E' }; 150 151 if (blen < sizeof(uuid)) 152 return TEE_ERROR_SHORT_BUFFER; 153 154 if (tee_otp_get_die_id 155 (data + nslen, sizeof(data) - nslen)) 156 return TEE_ERROR_BAD_STATE; 157 158 res = tee_hash_createdigest(TEE_ALG_SHA256, data, 159 sizeof(data), 160 (uint8_t *)&uuid, 161 sizeof(uuid)); 162 if (res != TEE_SUCCESS) 163 return TEE_ERROR_BAD_STATE; 164 165 /* 166 * Changes the random value into and UUID as specifiec 167 * in RFC 4122. The magic values are from the example 168 * code in the RFC. 169 * 170 * TEE_UUID is defined slightly different from the RFC, 171 * but close enough for our purpose. 172 */ 173 174 uuid.timeHiAndVersion &= 0x0fff; 175 uuid.timeHiAndVersion |= 5 << 12; 176 177 /* uuid.clock_seq_hi_and_reserved in the RFC */ 178 uuid.clockSeqAndNode[0] &= 0x3f; 179 uuid.clockSeqAndNode[0] |= 0x80; 180 181 return tee_svc_copy_to_user(sess, (void *)buf, &uuid, 182 sizeof(TEE_UUID)); 183 } 184 185 case UTEE_PROP_TEE_SYS_TIME_PROT_LEVEL: 186 if (blen < sizeof(sys_time_prot_lvl)) 187 return TEE_ERROR_SHORT_BUFFER; 188 return tee_svc_copy_to_user(sess, (void *)buf, 189 &sys_time_prot_lvl, 190 sizeof(sys_time_prot_lvl)); 191 192 case UTEE_PROP_TEE_TA_TIME_PROT_LEVEL: 193 if (blen < sizeof(ta_time_prot_lvl)) 194 return TEE_ERROR_SHORT_BUFFER; 195 return tee_svc_copy_to_user(sess, (void *)buf, 196 &ta_time_prot_lvl, 197 sizeof(ta_time_prot_lvl)); 198 199 case UTEE_PROP_CLIENT_ID: 200 if (blen < sizeof(TEE_Identity)) 201 return TEE_ERROR_SHORT_BUFFER; 202 203 return tee_svc_copy_to_user(sess, (void *)buf, 204 &sess->clnt_id, sizeof(TEE_Identity)); 205 206 case UTEE_PROP_TA_APP_ID: 207 if (blen < sizeof(TEE_UUID)) 208 return TEE_ERROR_SHORT_BUFFER; 209 210 return tee_svc_copy_to_user(sess, (void *)buf, 211 &sess->ctx->head->uuid, sizeof(TEE_UUID)); 212 213 default: 214 break; 215 } 216 return TEE_ERROR_NOT_IMPLEMENTED; 217 } 218 219 /* 220 * TA invokes some TA with parameter. 221 * If some parameters are memory references: 222 * - either the memref is inside TA private RAM: TA is not allowed to expose 223 * its private RAM: use a temporary memory buffer and copy the data. 224 * - or the memref is not in the TA private RAM: 225 * - if the memref was mapped to the TA, TA is allowed to expose it. 226 * - if so, converts memref virtual address into a physical address. 227 */ 228 static TEE_Result tee_svc_copy_param(struct tee_ta_session *sess, 229 struct tee_ta_session *called_sess, 230 uint32_t param_types, 231 TEE_Param callee_params[TEE_NUM_PARAMS], 232 struct tee_ta_param *param, 233 tee_paddr_t tmp_buf_pa[TEE_NUM_PARAMS], 234 tee_mm_entry_t **mm) 235 { 236 size_t n; 237 TEE_Result res; 238 size_t req_mem = 0; 239 size_t s; 240 uint8_t *dst = 0; 241 tee_paddr_t dst_pa, src_pa = 0; 242 bool ta_private_memref[TEE_NUM_PARAMS]; 243 244 /* fill 'param' input struct with caller params description buffer */ 245 param->types = param_types; 246 if (!callee_params) { 247 if (param->types != 0) 248 return TEE_ERROR_BAD_PARAMETERS; 249 memset(param->params, 0, sizeof(param->params)); 250 } else { 251 tee_svc_copy_from_user(sess, param->params, callee_params, 252 sizeof(param->params)); 253 } 254 255 if ((called_sess != NULL) && 256 (called_sess->ctx->static_ta == NULL) && 257 (called_sess->ctx->flags & TA_FLAG_USER_MODE) == 0) { 258 /* 259 * kernel TA, borrow the mapping of the calling 260 * during this call. 261 */ 262 called_sess->calling_sess = sess; 263 return TEE_SUCCESS; 264 } 265 266 for (n = 0; n < TEE_NUM_PARAMS; n++) { 267 268 ta_private_memref[n] = false; 269 270 switch (TEE_PARAM_TYPE_GET(param->types, n)) { 271 case TEE_PARAM_TYPE_MEMREF_INPUT: 272 case TEE_PARAM_TYPE_MEMREF_OUTPUT: 273 case TEE_PARAM_TYPE_MEMREF_INOUT: 274 if (param->params[n].memref.buffer == NULL) { 275 if (param->params[n].memref.size != 0) 276 return TEE_ERROR_BAD_PARAMETERS; 277 break; 278 } 279 /* uTA cannot expose its private memory */ 280 if (tee_mmu_is_vbuf_inside_ta_private(sess->ctx, 281 param->params[n].memref.buffer, 282 param->params[n].memref.size)) { 283 284 s = ROUNDUP(param->params[n].memref.size, 285 sizeof(uint32_t)); 286 /* Check overflow */ 287 if (req_mem + s < req_mem) 288 return TEE_ERROR_BAD_PARAMETERS; 289 req_mem += s; 290 ta_private_memref[n] = true; 291 break; 292 } 293 if (tee_mmu_is_vbuf_intersect_ta_private(sess->ctx, 294 param->params[n].memref.buffer, 295 param->params[n].memref.size)) 296 return TEE_ERROR_BAD_PARAMETERS; 297 298 if (tee_mmu_user_va2pa(sess->ctx, 299 (void *)param->params[n].memref.buffer, 300 &src_pa) != TEE_SUCCESS) 301 return TEE_ERROR_BAD_PARAMETERS; 302 303 param->param_attr[n] = tee_mmu_user_get_cache_attr( 304 sess->ctx, 305 (void *)param->params[n].memref.buffer); 306 307 param->params[n].memref.buffer = (void *)src_pa; 308 break; 309 310 default: 311 break; 312 } 313 } 314 315 if (req_mem == 0) 316 return TEE_SUCCESS; 317 318 /* Allocate section in secure DDR */ 319 *mm = tee_mm_alloc(&tee_mm_sec_ddr, req_mem); 320 if (*mm == NULL) { 321 DMSG("tee_mm_alloc TEE_ERROR_GENERIC"); 322 return TEE_ERROR_GENERIC; 323 } 324 325 /* Get the virtual address for the section in secure DDR */ 326 res = tee_mmu_kmap(tee_mm_get_smem(*mm), req_mem, &dst); 327 if (res != TEE_SUCCESS) 328 return res; 329 dst_pa = tee_mm_get_smem(*mm); 330 331 for (n = 0; n < 4; n++) { 332 333 if (ta_private_memref[n] == false) 334 continue; 335 336 s = ROUNDUP(param->params[n].memref.size, sizeof(uint32_t)); 337 338 switch (TEE_PARAM_TYPE_GET(param->types, n)) { 339 case TEE_PARAM_TYPE_MEMREF_INPUT: 340 case TEE_PARAM_TYPE_MEMREF_INOUT: 341 if (param->params[n].memref.buffer != NULL) { 342 res = tee_svc_copy_from_user(sess, dst, 343 param->params[n].memref.buffer, 344 param->params[n].memref.size); 345 if (res != TEE_SUCCESS) 346 return res; 347 param->param_attr[n] = 348 tee_mmu_kmap_get_cache_attr(dst); 349 param->params[n].memref.buffer = (void *)dst_pa; 350 tmp_buf_pa[n] = dst_pa; 351 dst += s; 352 dst_pa += s; 353 } 354 break; 355 356 case TEE_PARAM_TYPE_MEMREF_OUTPUT: 357 if (param->params[n].memref.buffer != NULL) { 358 param->param_attr[n] = 359 tee_mmu_kmap_get_cache_attr(dst); 360 param->params[n].memref.buffer = (void *)dst_pa; 361 tmp_buf_pa[n] = dst_pa; 362 dst += s; 363 dst_pa += s; 364 } 365 break; 366 367 default: 368 continue; 369 } 370 } 371 372 tee_mmu_kunmap(dst, req_mem); 373 374 return TEE_SUCCESS; 375 } 376 377 /* 378 * Back from execution of service: update parameters passed from TA: 379 * If some parameters were memory references: 380 * - either the memref was temporary: copy back data and update size 381 * - or it was the original TA memref: update only the size value. 382 */ 383 static TEE_Result tee_svc_update_out_param( 384 struct tee_ta_session *sess, 385 struct tee_ta_session *called_sess, 386 struct tee_ta_param *param, 387 tee_paddr_t tmp_buf_pa[TEE_NUM_PARAMS], 388 TEE_Param callee_params[TEE_NUM_PARAMS]) 389 { 390 size_t n; 391 bool have_private_mem_map = (called_sess == NULL) || 392 (called_sess->ctx->static_ta != NULL) || 393 ((called_sess->ctx->flags & TA_FLAG_USER_MODE) != 0); 394 395 tee_ta_set_current_session(sess); 396 397 for (n = 0; n < TEE_NUM_PARAMS; n++) { 398 switch (TEE_PARAM_TYPE_GET(param->types, n)) { 399 case TEE_PARAM_TYPE_MEMREF_OUTPUT: 400 case TEE_PARAM_TYPE_MEMREF_INOUT: 401 402 /* outside TA private => memref is valid, update size */ 403 if (!tee_mmu_is_vbuf_inside_ta_private(sess->ctx, 404 callee_params[n].memref.buffer, 405 param->params[n].memref.size)) { 406 callee_params[n].memref.size = 407 param->params[n].memref.size; 408 break; 409 } 410 411 /* 412 * If we called a kernel TA the parameters are in shared 413 * memory and no copy is needed. 414 */ 415 if (have_private_mem_map && 416 param->params[n].memref.size <= 417 callee_params[n].memref.size) { 418 uint8_t *src = 0; 419 TEE_Result res; 420 421 /* FIXME: TA_RAM is already mapped ! */ 422 res = tee_mmu_kmap(tmp_buf_pa[n], 423 param->params[n].memref.size, &src); 424 if (res != TEE_SUCCESS) 425 return TEE_ERROR_GENERIC; 426 427 res = tee_svc_copy_to_user(sess, 428 callee_params[n].memref. 429 buffer, src, 430 param->params[n]. 431 memref.size); 432 if (res != TEE_SUCCESS) 433 return res; 434 tee_mmu_kunmap(src, 435 param->params[n].memref.size); 436 437 } 438 callee_params[n].memref.size = param->params[n].memref.size; 439 break; 440 441 case TEE_PARAM_TYPE_VALUE_OUTPUT: 442 case TEE_PARAM_TYPE_VALUE_INOUT: 443 callee_params[n].value = param->params[n].value; 444 break; 445 446 default: 447 continue; 448 } 449 } 450 451 return TEE_SUCCESS; 452 } 453 454 /* Called when a TA calls an OpenSession on another TA */ 455 TEE_Result tee_svc_open_ta_session(const TEE_UUID *dest, 456 uint32_t cancel_req_to, uint32_t param_types, 457 TEE_Param params[4], 458 TEE_TASessionHandle *ta_sess, 459 uint32_t *ret_orig) 460 { 461 TEE_Result res; 462 uint32_t ret_o = TEE_ORIGIN_TEE; 463 struct tee_ta_session *s = NULL; 464 struct tee_ta_session *sess; 465 tee_mm_entry_t *mm_param = NULL; 466 467 TEE_UUID *uuid = malloc(sizeof(TEE_UUID)); 468 struct tee_ta_param *param = malloc(sizeof(struct tee_ta_param)); 469 TEE_Identity *clnt_id = malloc(sizeof(TEE_Identity)); 470 tee_paddr_t tmp_buf_pa[TEE_NUM_PARAMS]; 471 472 if (uuid == NULL || param == NULL || clnt_id == NULL) { 473 res = TEE_ERROR_OUT_OF_MEMORY; 474 goto out_free_only; 475 } 476 477 memset(param, 0, sizeof(struct tee_ta_param)); 478 479 res = tee_ta_get_current_session(&sess); 480 if (res != TEE_SUCCESS) 481 goto out_free_only; 482 483 res = tee_svc_copy_from_user(sess, uuid, dest, sizeof(TEE_UUID)); 484 if (res != TEE_SUCCESS) 485 goto function_exit; 486 487 clnt_id->login = TEE_LOGIN_TRUSTED_APP; 488 memcpy(&clnt_id->uuid, &sess->ctx->head->uuid, sizeof(TEE_UUID)); 489 490 res = tee_svc_copy_param(sess, NULL, param_types, params, param, 491 tmp_buf_pa, &mm_param); 492 if (res != TEE_SUCCESS) 493 goto function_exit; 494 495 /* 496 * Find session of a multi session TA or a static TA 497 * In such a case, there is no need to ask the supplicant for the TA 498 * code 499 */ 500 res = tee_ta_open_session(&ret_o, &s, &sess->ctx->open_sessions, uuid, 501 clnt_id, cancel_req_to, param); 502 if (res != TEE_SUCCESS) 503 goto function_exit; 504 505 res = tee_svc_update_out_param(sess, NULL, param, tmp_buf_pa, params); 506 507 function_exit: 508 tee_ta_set_current_session(sess); 509 510 if (mm_param != NULL) { 511 TEE_Result res2; 512 void *va = 0; 513 514 res2 = 515 tee_mmu_kmap_pa2va((void *)tee_mm_get_smem(mm_param), &va); 516 if (res2 == TEE_SUCCESS) 517 tee_mmu_kunmap(va, tee_mm_get_bytes(mm_param)); 518 } 519 tee_mm_free(mm_param); 520 tee_svc_copy_to_user(sess, ta_sess, &s, sizeof(s)); 521 tee_svc_copy_to_user(sess, ret_orig, &ret_o, sizeof(ret_o)); 522 523 out_free_only: 524 free(param); 525 free(uuid); 526 free(clnt_id); 527 return res; 528 } 529 530 TEE_Result tee_svc_close_ta_session(TEE_TASessionHandle ta_sess) 531 { 532 TEE_Result res; 533 struct tee_ta_session *sess; 534 535 res = tee_ta_get_current_session(&sess); 536 if (res != TEE_SUCCESS) 537 return res; 538 539 tee_ta_set_current_session(NULL); 540 541 res = 542 tee_ta_close_session((uint32_t)ta_sess, &sess->ctx->open_sessions); 543 tee_ta_set_current_session(sess); 544 return res; 545 } 546 547 TEE_Result tee_svc_invoke_ta_command(TEE_TASessionHandle ta_sess, 548 uint32_t cancel_req_to, uint32_t cmd_id, 549 uint32_t param_types, TEE_Param params[4], 550 uint32_t *ret_orig) 551 { 552 TEE_Result res; 553 uint32_t ret_o = TEE_ORIGIN_TEE; 554 struct tee_ta_param param = { 0 }; 555 struct tee_ta_session *sess; 556 struct tee_ta_session *called_sess = (struct tee_ta_session *)ta_sess; 557 tee_mm_entry_t *mm_param = NULL; 558 tee_paddr_t tmp_buf_pa[TEE_NUM_PARAMS]; 559 560 res = tee_ta_get_current_session(&sess); 561 if (res != TEE_SUCCESS) 562 return res; 563 564 res = 565 tee_ta_verify_session_pointer(called_sess, 566 &sess->ctx->open_sessions); 567 if (res != TEE_SUCCESS) 568 return res; 569 570 res = tee_svc_copy_param(sess, called_sess, param_types, params, 571 ¶m, tmp_buf_pa, &mm_param); 572 if (res != TEE_SUCCESS) 573 goto function_exit; 574 575 res = 576 tee_ta_invoke_command(&ret_o, called_sess, cancel_req_to, 577 cmd_id, ¶m); 578 if (res != TEE_SUCCESS) 579 goto function_exit; 580 581 res = tee_svc_update_out_param(sess, called_sess, ¶m, tmp_buf_pa, 582 params); 583 if (res != TEE_SUCCESS) 584 goto function_exit; 585 586 function_exit: 587 tee_ta_set_current_session(sess); 588 called_sess->calling_sess = NULL; /* clear eventual borrowed mapping */ 589 590 if (mm_param != NULL) { 591 TEE_Result res2; 592 void *va = 0; 593 594 res2 = 595 tee_mmu_kmap_pa2va((void *)tee_mm_get_smem(mm_param), &va); 596 if (res2 == TEE_SUCCESS) 597 tee_mmu_kunmap(va, tee_mm_get_bytes(mm_param)); 598 } 599 tee_mm_free(mm_param); 600 if (ret_orig) 601 tee_svc_copy_to_user(sess, ret_orig, &ret_o, sizeof(ret_o)); 602 return res; 603 } 604 605 TEE_Result tee_svc_check_access_rights(uint32_t flags, const void *buf, 606 size_t len) 607 { 608 TEE_Result res; 609 struct tee_ta_session *s; 610 611 res = tee_ta_get_current_session(&s); 612 if (res != TEE_SUCCESS) 613 return res; 614 615 return tee_mmu_check_access_rights(s->ctx, flags, (tee_uaddr_t)buf, 616 len); 617 } 618 619 TEE_Result tee_svc_copy_from_user(struct tee_ta_session *sess, void *kaddr, 620 const void *uaddr, size_t len) 621 { 622 TEE_Result res; 623 struct tee_ta_session *s; 624 625 if (sess == NULL) { 626 res = tee_ta_get_current_session(&s); 627 if (res != TEE_SUCCESS) 628 return res; 629 } else { 630 s = sess; 631 tee_ta_set_current_session(s); 632 } 633 res = 634 tee_mmu_check_access_rights(s->ctx, 635 TEE_MEMORY_ACCESS_READ | 636 TEE_MEMORY_ACCESS_ANY_OWNER, 637 (tee_uaddr_t)uaddr, len); 638 if (res != TEE_SUCCESS) 639 return res; 640 641 memcpy(kaddr, uaddr, len); 642 return TEE_SUCCESS; 643 } 644 645 TEE_Result tee_svc_copy_to_user(struct tee_ta_session *sess, void *uaddr, 646 const void *kaddr, size_t len) 647 { 648 TEE_Result res; 649 struct tee_ta_session *s; 650 651 if (sess == NULL) { 652 res = tee_ta_get_current_session(&s); 653 if (res != TEE_SUCCESS) 654 return res; 655 } else { 656 s = sess; 657 tee_ta_set_current_session(s); 658 } 659 660 res = 661 tee_mmu_check_access_rights(s->ctx, 662 TEE_MEMORY_ACCESS_WRITE | 663 TEE_MEMORY_ACCESS_ANY_OWNER, 664 (tee_uaddr_t)uaddr, len); 665 if (res != TEE_SUCCESS) 666 return res; 667 668 memcpy(uaddr, kaddr, len); 669 return TEE_SUCCESS; 670 } 671 672 static bool session_is_cancelled(struct tee_ta_session *s, TEE_Time *curr_time) 673 { 674 TEE_Time current_time; 675 676 if (s->cancel_mask) 677 return false; 678 679 if (s->cancel) 680 return true; 681 682 if (s->cancel_time.seconds == UINT32_MAX) 683 return false; 684 685 if (curr_time != NULL) 686 current_time = *curr_time; 687 else if (tee_time_get_sys_time(¤t_time) != TEE_SUCCESS) 688 return false; 689 690 if (current_time.seconds > s->cancel_time.seconds || 691 (current_time.seconds == s->cancel_time.seconds && 692 current_time.millis >= s->cancel_time.millis)) { 693 return true; 694 } 695 696 return false; 697 } 698 699 TEE_Result tee_svc_get_cancellation_flag(bool *cancel) 700 { 701 TEE_Result res; 702 struct tee_ta_session *s = NULL; 703 bool c; 704 705 res = tee_ta_get_current_session(&s); 706 if (res != TEE_SUCCESS) 707 return res; 708 709 c = session_is_cancelled(s, NULL); 710 711 return tee_svc_copy_to_user(s, cancel, &c, sizeof(c)); 712 } 713 714 TEE_Result tee_svc_unmask_cancellation(bool *old_mask) 715 { 716 TEE_Result res; 717 struct tee_ta_session *s = NULL; 718 bool m; 719 720 res = tee_ta_get_current_session(&s); 721 if (res != TEE_SUCCESS) 722 return res; 723 724 m = s->cancel_mask; 725 s->cancel_mask = false; 726 return tee_svc_copy_to_user(s, old_mask, &m, sizeof(m)); 727 } 728 729 TEE_Result tee_svc_mask_cancellation(bool *old_mask) 730 { 731 TEE_Result res; 732 struct tee_ta_session *s = NULL; 733 bool m; 734 735 res = tee_ta_get_current_session(&s); 736 if (res != TEE_SUCCESS) 737 return res; 738 739 m = s->cancel_mask; 740 s->cancel_mask = true; 741 return tee_svc_copy_to_user(s, old_mask, &m, sizeof(m)); 742 } 743 744 TEE_Result tee_svc_wait(uint32_t timeout) 745 { 746 TEE_Result res = TEE_SUCCESS; 747 uint32_t mytime = 0; 748 struct tee_ta_session *s; 749 TEE_Time base_time; 750 TEE_Time current_time; 751 752 res = tee_ta_get_current_session(&s); 753 if (res != TEE_SUCCESS) 754 return res; 755 756 res = tee_time_get_sys_time(&base_time); 757 if (res != TEE_SUCCESS) 758 return res; 759 760 while (true) { 761 res = tee_time_get_sys_time(¤t_time); 762 if (res != TEE_SUCCESS) 763 return res; 764 765 if (session_is_cancelled(s, ¤t_time)) 766 return TEE_ERROR_CANCEL; 767 768 mytime = (current_time.seconds - base_time.seconds) * 1000 + 769 (int)current_time.millis - (int)base_time.millis; 770 if (mytime >= timeout) 771 return TEE_SUCCESS; 772 773 tee_time_wait(timeout - mytime); 774 } 775 776 return res; 777 } 778 779 TEE_Result tee_svc_get_time(enum utee_time_category cat, TEE_Time *mytime) 780 { 781 TEE_Result res, res2; 782 struct tee_ta_session *s = NULL; 783 TEE_Time t; 784 785 res = tee_ta_get_current_session(&s); 786 if (res != TEE_SUCCESS) 787 return res; 788 789 switch (cat) { 790 case UTEE_TIME_CAT_SYSTEM: 791 res = tee_time_get_sys_time(&t); 792 break; 793 case UTEE_TIME_CAT_TA_PERSISTENT: 794 res = 795 tee_time_get_ta_time((const void *)&s->ctx->head->uuid, &t); 796 break; 797 case UTEE_TIME_CAT_REE: 798 res = tee_time_get_ree_time(&t); 799 break; 800 default: 801 res = TEE_ERROR_BAD_PARAMETERS; 802 break; 803 } 804 805 if (res == TEE_SUCCESS || res == TEE_ERROR_OVERFLOW) { 806 res2 = tee_svc_copy_to_user(s, mytime, &t, sizeof(t)); 807 if (res2 != TEE_SUCCESS) 808 res = res2; 809 } 810 811 return res; 812 } 813 814 TEE_Result tee_svc_set_ta_time(const TEE_Time *mytime) 815 { 816 TEE_Result res; 817 struct tee_ta_session *s = NULL; 818 TEE_Time t; 819 820 res = tee_ta_get_current_session(&s); 821 if (res != TEE_SUCCESS) 822 return res; 823 824 res = tee_svc_copy_from_user(s, &t, mytime, sizeof(t)); 825 if (res != TEE_SUCCESS) 826 return res; 827 828 return tee_time_set_ta_time((const void *)&s->ctx->head->uuid, &t); 829 } 830 831 #ifdef CFG_CACHE_API 832 TEE_Result tee_svc_cache_operation(void *va, size_t len, 833 enum utee_cache_operation op) 834 { 835 TEE_Result res; 836 struct tee_ta_session *s = NULL; 837 838 res = tee_ta_get_current_session(&s); 839 if (res != TEE_SUCCESS) 840 return res; 841 842 if ((s->ctx->flags & TA_FLAG_CACHE_MAINTENANCE) == 0) 843 return TEE_ERROR_NOT_SUPPORTED; 844 845 return tee_uta_cache_operation(s, op, va, len); 846 } 847 #endif 848