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 #include <assert.h> 48 49 vaddr_t tee_svc_uref_base; 50 51 #if (TRACE_LEVEL == TRACE_FLOW) && defined(CFG_TEE_CORE_TA_TRACE) 52 void tee_svc_trace_syscall(int num) 53 { 54 /* #0 is syscall return, not really interesting */ 55 if (num == 0) 56 return; 57 FMSG("syscall #%d", num); 58 } 59 #endif 60 61 void syscall_log(const void *buf __unused, size_t len __unused) 62 { 63 #ifdef CFG_TEE_CORE_TA_TRACE 64 char *kbuf; 65 66 if (len == 0) 67 return; 68 69 kbuf = malloc(len); 70 if (kbuf == NULL) 71 return; 72 *kbuf = '\0'; 73 74 /* log as Info/Raw traces */ 75 if (tee_svc_copy_from_user(NULL, kbuf, buf, len) == TEE_SUCCESS) 76 TAMSG_RAW("%.*s", (int)len, kbuf); 77 78 free(kbuf); 79 #endif 80 } 81 82 TEE_Result syscall_reserved(void) 83 { 84 return TEE_ERROR_GENERIC; 85 } 86 87 TEE_Result syscall_not_supported(void) 88 { 89 return TEE_ERROR_NOT_SUPPORTED; 90 } 91 92 uint32_t syscall_dummy(uint32_t *a __unused) 93 { 94 DMSG("tee_svc_sys_dummy: a 0x%" PRIxVA, (vaddr_t)a); 95 return 0; 96 } 97 98 uint32_t syscall_dummy_7args(unsigned long a1 __unused, 99 unsigned long a2 __unused, unsigned long a3 __unused, 100 unsigned long a4 __unused, unsigned long a5 __unused, 101 unsigned long a6 __unused, unsigned long a7 __unused) 102 { 103 DMSG("tee_svc_sys_dummy_7args: 0x%lx, 0x%lx, 0x%lx, 0x%lx, 0x%lx, %lx, %lx\n", 104 a1, a2, a3, a4, a5, a6, a7); 105 return 0; 106 } 107 108 uint32_t syscall_nocall(void) 109 { 110 DMSG("No syscall"); 111 return 0x1; 112 } 113 114 /* Configuration properties */ 115 /* API implementation version */ 116 static const char api_vers[] = TO_STR(CFG_TEE_API_VERSION); 117 118 /* Implementation description (implementation-dependent) */ 119 static const char descr[] = TO_STR(CFG_TEE_IMPL_DESCR); 120 121 /* 122 * TA persistent time protection level 123 * 100: Persistent time based on an REE-controlled real-time clock 124 * and on the TEE Trusted Storage for the storage of origins (default). 125 * 1000: Persistent time based on a TEE-controlled real-time clock 126 * and the TEE Trusted Storage. 127 * The real-time clock MUST be out of reach of software attacks 128 * from the REE. 129 */ 130 static const uint32_t ta_time_prot_lvl = 100; 131 132 /* Elliptic Curve Cryptographic support (false by default) */ 133 static const bool crypto_ecc_en; 134 135 /* 136 * Trusted storage anti rollback protection level 137 * 0 (or missing): No antirollback protection (default) 138 * 100: Antirollback enforced at REE level 139 * 1000: Antirollback TEE-controlled hardware 140 */ 141 static const uint32_t ts_antiroll_prot_lvl; 142 143 /* Trusted OS implementation version */ 144 static const char trustedos_impl_version[] = TO_STR(CFG_TEE_IMPL_VERSION); 145 146 /* Trusted OS implementation version (binary value) */ 147 static const uint32_t trustedos_impl_bin_version; /* 0 by default */ 148 149 /* Trusted OS implementation manufacturer name */ 150 static const char trustedos_manufacturer[] = TO_STR(CFG_TEE_MANUFACTURER); 151 152 /* Trusted firmware version */ 153 static const char fw_impl_version[] = TO_STR(CFG_TEE_FW_IMPL_VERSION); 154 155 /* Trusted firmware version (binary value) */ 156 static const uint32_t fw_impl_bin_version; /* 0 by default */ 157 158 /* Trusted firmware manufacturer name */ 159 static const char fw_manufacturer[] = TO_STR(CFG_TEE_FW_MANUFACTURER); 160 161 struct tee_props { 162 const void *data; 163 const size_t len; 164 }; 165 166 /* Consistent with enum utee_property */ 167 const struct tee_props tee_props_lut[] = { 168 {api_vers, sizeof(api_vers)}, 169 {descr, sizeof(descr)}, 170 {0, 0}, /* dev_id */ 171 {0, 0}, /* system time protection level */ 172 {&ta_time_prot_lvl, sizeof(ta_time_prot_lvl)}, 173 {&crypto_ecc_en, sizeof(crypto_ecc_en)}, 174 {&ts_antiroll_prot_lvl, sizeof(ts_antiroll_prot_lvl)}, 175 {trustedos_impl_version, sizeof(trustedos_impl_version)}, 176 {&trustedos_impl_bin_version, 177 sizeof(trustedos_impl_bin_version)}, 178 {trustedos_manufacturer, sizeof(trustedos_manufacturer)}, 179 {fw_impl_version, sizeof(fw_impl_version)}, 180 {&fw_impl_bin_version, sizeof(fw_impl_bin_version)}, 181 {fw_manufacturer, sizeof(fw_manufacturer)}, 182 {0, 0}, /* client_id */ 183 {0, 0}, /* ta_app_id */ 184 }; 185 186 TEE_Result syscall_get_property(unsigned long prop, void *buf, size_t blen) 187 { 188 struct tee_ta_session *sess; 189 TEE_Result res; 190 191 if (prop > ARRAY_SIZE(tee_props_lut)-1) 192 return TEE_ERROR_NOT_IMPLEMENTED; 193 194 res = tee_ta_get_current_session(&sess); 195 if (res != TEE_SUCCESS) 196 return res; 197 198 switch (prop) { 199 case UTEE_PROP_TEE_DEV_ID: 200 { 201 TEE_UUID uuid; 202 const size_t nslen = 5; 203 uint8_t data[5 + 204 FVR_DIE_ID_NUM_REGS * sizeof(uint32_t)] = { 205 'O', 'P', 'T', 'E', 'E' }; 206 207 if (blen < sizeof(uuid)) 208 return TEE_ERROR_SHORT_BUFFER; 209 210 if (tee_otp_get_die_id 211 (data + nslen, sizeof(data) - nslen)) 212 return TEE_ERROR_BAD_STATE; 213 214 res = tee_hash_createdigest(TEE_ALG_SHA256, data, 215 sizeof(data), 216 (uint8_t *)&uuid, 217 sizeof(uuid)); 218 if (res != TEE_SUCCESS) 219 return TEE_ERROR_BAD_STATE; 220 221 /* 222 * Changes the random value into and UUID as specifiec 223 * in RFC 4122. The magic values are from the example 224 * code in the RFC. 225 * 226 * TEE_UUID is defined slightly different from the RFC, 227 * but close enough for our purpose. 228 */ 229 230 uuid.timeHiAndVersion &= 0x0fff; 231 uuid.timeHiAndVersion |= 5 << 12; 232 233 /* uuid.clock_seq_hi_and_reserved in the RFC */ 234 uuid.clockSeqAndNode[0] &= 0x3f; 235 uuid.clockSeqAndNode[0] |= 0x80; 236 237 return tee_svc_copy_to_user(sess, buf, &uuid, 238 sizeof(TEE_UUID)); 239 } 240 241 case UTEE_PROP_TEE_SYS_TIME_PROT_LEVEL: 242 { 243 uint32_t prot; 244 245 if (blen < sizeof(prot)) 246 return TEE_ERROR_SHORT_BUFFER; 247 prot = tee_time_get_sys_time_protection_level(); 248 return tee_svc_copy_to_user(sess, (void *)buf, 249 &prot, sizeof(prot)); 250 } 251 252 case UTEE_PROP_CLIENT_ID: 253 if (blen < sizeof(TEE_Identity)) 254 return TEE_ERROR_SHORT_BUFFER; 255 return tee_svc_copy_to_user(sess, buf, &sess->clnt_id, 256 sizeof(TEE_Identity)); 257 258 case UTEE_PROP_TA_APP_ID: 259 if (blen < sizeof(TEE_UUID)) 260 return TEE_ERROR_SHORT_BUFFER; 261 return tee_svc_copy_to_user(sess, buf, &sess->ctx->uuid, 262 sizeof(TEE_UUID)); 263 default: 264 if (blen < tee_props_lut[prop].len) 265 return TEE_ERROR_SHORT_BUFFER; 266 return tee_svc_copy_to_user(sess, buf, tee_props_lut[prop].data, 267 tee_props_lut[prop].len); 268 } 269 } 270 271 static void utee_param_to_param(struct tee_ta_param *p, struct utee_params *up) 272 { 273 size_t n; 274 uint32_t types = up->types; 275 276 p->types = types; 277 for (n = 0; n < TEE_NUM_PARAMS; n++) { 278 uintptr_t a = up->vals[n * 2]; 279 size_t b = up->vals[n * 2 + 1]; 280 281 switch (TEE_PARAM_TYPE_GET(types, n)) { 282 case TEE_PARAM_TYPE_MEMREF_INPUT: 283 case TEE_PARAM_TYPE_MEMREF_OUTPUT: 284 case TEE_PARAM_TYPE_MEMREF_INOUT: 285 p->params[n].memref.buffer = (void *)a; 286 p->params[n].memref.size = b; 287 break; 288 case TEE_PARAM_TYPE_VALUE_INPUT: 289 case TEE_PARAM_TYPE_VALUE_INOUT: 290 p->params[n].value.a = a; 291 p->params[n].value.b = b; 292 break; 293 default: 294 p->params[n].value.a = 0; 295 p->params[n].value.b = 0; 296 break; 297 } 298 } 299 } 300 301 /* 302 * TA invokes some TA with parameter. 303 * If some parameters are memory references: 304 * - either the memref is inside TA private RAM: TA is not allowed to expose 305 * its private RAM: use a temporary memory buffer and copy the data. 306 * - or the memref is not in the TA private RAM: 307 * - if the memref was mapped to the TA, TA is allowed to expose it. 308 * - if so, converts memref virtual address into a physical address. 309 */ 310 static TEE_Result tee_svc_copy_param(struct tee_ta_session *sess, 311 struct tee_ta_session *called_sess, 312 struct utee_params *callee_params, 313 struct tee_ta_param *param, 314 tee_paddr_t tmp_buf_pa[TEE_NUM_PARAMS], 315 tee_mm_entry_t **mm) 316 { 317 size_t n; 318 TEE_Result res; 319 size_t req_mem = 0; 320 size_t s; 321 uint8_t *dst = 0; 322 tee_paddr_t dst_pa, src_pa = 0; 323 bool ta_private_memref[TEE_NUM_PARAMS]; 324 325 /* fill 'param' input struct with caller params description buffer */ 326 if (!callee_params) { 327 memset(param, 0, sizeof(*param)); 328 } else { 329 res = tee_mmu_check_access_rights(sess->ctx, 330 TEE_MEMORY_ACCESS_READ | TEE_MEMORY_ACCESS_ANY_OWNER, 331 (tee_uaddr_t)callee_params, sizeof(struct utee_params)); 332 if (res != TEE_SUCCESS) 333 return res; 334 utee_param_to_param(param, callee_params); 335 } 336 337 if ((called_sess != NULL) && 338 (called_sess->ctx->static_ta == NULL) && 339 (called_sess->ctx->flags & TA_FLAG_USER_MODE) == 0) { 340 /* 341 * kernel TA, borrow the mapping of the calling 342 * during this call. 343 */ 344 called_sess->calling_sess = sess; 345 return TEE_SUCCESS; 346 } 347 348 for (n = 0; n < TEE_NUM_PARAMS; n++) { 349 350 ta_private_memref[n] = false; 351 352 switch (TEE_PARAM_TYPE_GET(param->types, n)) { 353 case TEE_PARAM_TYPE_MEMREF_INPUT: 354 case TEE_PARAM_TYPE_MEMREF_OUTPUT: 355 case TEE_PARAM_TYPE_MEMREF_INOUT: 356 if (param->params[n].memref.buffer == NULL) { 357 if (param->params[n].memref.size != 0) 358 return TEE_ERROR_BAD_PARAMETERS; 359 break; 360 } 361 /* uTA cannot expose its private memory */ 362 if (tee_mmu_is_vbuf_inside_ta_private(sess->ctx, 363 param->params[n].memref.buffer, 364 param->params[n].memref.size)) { 365 366 s = ROUNDUP(param->params[n].memref.size, 367 sizeof(uint32_t)); 368 /* Check overflow */ 369 if (req_mem + s < req_mem) 370 return TEE_ERROR_BAD_PARAMETERS; 371 req_mem += s; 372 ta_private_memref[n] = true; 373 break; 374 } 375 if (tee_mmu_is_vbuf_intersect_ta_private(sess->ctx, 376 param->params[n].memref.buffer, 377 param->params[n].memref.size)) 378 return TEE_ERROR_BAD_PARAMETERS; 379 380 if (tee_mmu_user_va2pa(sess->ctx, 381 (void *)param->params[n].memref.buffer, 382 &src_pa) != TEE_SUCCESS) 383 return TEE_ERROR_BAD_PARAMETERS; 384 385 param->param_attr[n] = tee_mmu_user_get_cache_attr( 386 sess->ctx, 387 (void *)param->params[n].memref.buffer); 388 389 param->params[n].memref.buffer = (void *)src_pa; 390 break; 391 392 default: 393 break; 394 } 395 } 396 397 if (req_mem == 0) 398 return TEE_SUCCESS; 399 400 /* Allocate section in secure DDR */ 401 *mm = tee_mm_alloc(&tee_mm_sec_ddr, req_mem); 402 if (*mm == NULL) { 403 DMSG("tee_mm_alloc TEE_ERROR_GENERIC"); 404 return TEE_ERROR_GENERIC; 405 } 406 407 /* Get the virtual address for the section in secure DDR */ 408 res = tee_mmu_kmap(tee_mm_get_smem(*mm), req_mem, &dst); 409 if (res != TEE_SUCCESS) 410 return res; 411 dst_pa = tee_mm_get_smem(*mm); 412 413 for (n = 0; n < 4; n++) { 414 415 if (ta_private_memref[n] == false) 416 continue; 417 418 s = ROUNDUP(param->params[n].memref.size, sizeof(uint32_t)); 419 420 switch (TEE_PARAM_TYPE_GET(param->types, n)) { 421 case TEE_PARAM_TYPE_MEMREF_INPUT: 422 case TEE_PARAM_TYPE_MEMREF_INOUT: 423 if (param->params[n].memref.buffer != NULL) { 424 res = tee_svc_copy_from_user(sess, dst, 425 param->params[n].memref.buffer, 426 param->params[n].memref.size); 427 if (res != TEE_SUCCESS) 428 return res; 429 param->param_attr[n] = 430 tee_mmu_kmap_get_cache_attr(dst); 431 param->params[n].memref.buffer = (void *)dst_pa; 432 tmp_buf_pa[n] = dst_pa; 433 dst += s; 434 dst_pa += s; 435 } 436 break; 437 438 case TEE_PARAM_TYPE_MEMREF_OUTPUT: 439 if (param->params[n].memref.buffer != NULL) { 440 param->param_attr[n] = 441 tee_mmu_kmap_get_cache_attr(dst); 442 param->params[n].memref.buffer = (void *)dst_pa; 443 tmp_buf_pa[n] = dst_pa; 444 dst += s; 445 dst_pa += s; 446 } 447 break; 448 449 default: 450 continue; 451 } 452 } 453 454 tee_mmu_kunmap(dst, req_mem); 455 456 return TEE_SUCCESS; 457 } 458 459 /* 460 * Back from execution of service: update parameters passed from TA: 461 * If some parameters were memory references: 462 * - either the memref was temporary: copy back data and update size 463 * - or it was the original TA memref: update only the size value. 464 */ 465 static TEE_Result tee_svc_update_out_param( 466 struct tee_ta_session *sess, 467 struct tee_ta_session *called_sess, 468 struct tee_ta_param *param, 469 tee_paddr_t tmp_buf_pa[TEE_NUM_PARAMS], 470 struct utee_params *usr_param) 471 { 472 size_t n; 473 void *p; 474 bool have_private_mem_map = (called_sess == NULL) || 475 (called_sess->ctx->static_ta != NULL) || 476 ((called_sess->ctx->flags & TA_FLAG_USER_MODE) != 0); 477 478 479 tee_ta_set_current_session(sess); 480 481 for (n = 0; n < TEE_NUM_PARAMS; n++) { 482 switch (TEE_PARAM_TYPE_GET(param->types, n)) { 483 case TEE_PARAM_TYPE_MEMREF_OUTPUT: 484 case TEE_PARAM_TYPE_MEMREF_INOUT: 485 p = (void *)(uintptr_t)usr_param->vals[n * 2]; 486 487 /* outside TA private => memref is valid, update size */ 488 if (!tee_mmu_is_vbuf_inside_ta_private(sess->ctx, p, 489 param->params[n].memref.size)) { 490 usr_param->vals[n * 2 + 1] = 491 param->params[n].memref.size; 492 break; 493 } 494 495 /* 496 * If we called a kernel TA the parameters are in shared 497 * memory and no copy is needed. 498 */ 499 if (have_private_mem_map && 500 param->params[n].memref.size <= 501 usr_param->vals[n * 2 + 1]) { 502 uint8_t *src = 0; 503 TEE_Result res; 504 505 /* FIXME: TA_RAM is already mapped ! */ 506 res = tee_mmu_kmap(tmp_buf_pa[n], 507 param->params[n].memref.size, &src); 508 if (res != TEE_SUCCESS) 509 return TEE_ERROR_GENERIC; 510 511 res = tee_svc_copy_to_user(sess, p, src, 512 param->params[n].memref.size); 513 if (res != TEE_SUCCESS) 514 return res; 515 tee_mmu_kunmap(src, 516 param->params[n].memref.size); 517 518 } 519 usr_param->vals[n * 2 + 1] = 520 param->params[n].memref.size; 521 break; 522 523 case TEE_PARAM_TYPE_VALUE_OUTPUT: 524 case TEE_PARAM_TYPE_VALUE_INOUT: 525 usr_param->vals[n * 2] = param->params[n].value.a; 526 usr_param->vals[n * 2 + 1] = param->params[n].value.b; 527 break; 528 529 default: 530 continue; 531 } 532 } 533 534 return TEE_SUCCESS; 535 } 536 537 /* Called when a TA calls an OpenSession on another TA */ 538 TEE_Result syscall_open_ta_session(const TEE_UUID *dest, 539 unsigned long cancel_req_to, 540 struct utee_params *usr_param, uint32_t *ta_sess, 541 uint32_t *ret_orig) 542 { 543 TEE_Result res; 544 uint32_t ret_o = TEE_ORIGIN_TEE; 545 struct tee_ta_session *s = NULL; 546 struct tee_ta_session *sess; 547 tee_mm_entry_t *mm_param = NULL; 548 TEE_UUID *uuid = malloc(sizeof(TEE_UUID)); 549 struct tee_ta_param *param = malloc(sizeof(struct tee_ta_param)); 550 TEE_Identity *clnt_id = malloc(sizeof(TEE_Identity)); 551 tee_paddr_t tmp_buf_pa[TEE_NUM_PARAMS]; 552 553 if (uuid == NULL || param == NULL || clnt_id == NULL) { 554 res = TEE_ERROR_OUT_OF_MEMORY; 555 goto out_free_only; 556 } 557 558 memset(param, 0, sizeof(struct tee_ta_param)); 559 560 res = tee_ta_get_current_session(&sess); 561 if (res != TEE_SUCCESS) 562 goto out_free_only; 563 564 res = tee_svc_copy_from_user(sess, uuid, dest, sizeof(TEE_UUID)); 565 if (res != TEE_SUCCESS) 566 goto function_exit; 567 568 clnt_id->login = TEE_LOGIN_TRUSTED_APP; 569 memcpy(&clnt_id->uuid, &sess->ctx->uuid, sizeof(TEE_UUID)); 570 571 res = tee_svc_copy_param(sess, NULL, usr_param, param, tmp_buf_pa, 572 &mm_param); 573 if (res != TEE_SUCCESS) 574 goto function_exit; 575 576 /* 577 * Find session of a multi session TA or a static TA 578 * In such a case, there is no need to ask the supplicant for the TA 579 * code 580 */ 581 res = tee_ta_open_session(&ret_o, &s, &sess->ctx->open_sessions, uuid, 582 clnt_id, cancel_req_to, param); 583 if (res != TEE_SUCCESS) 584 goto function_exit; 585 586 res = tee_svc_update_out_param(sess, NULL, param, tmp_buf_pa, 587 usr_param); 588 589 function_exit: 590 tee_ta_set_current_session(sess); 591 592 if (mm_param != NULL) { 593 TEE_Result res2; 594 void *va = 0; 595 596 res2 = 597 tee_mmu_kmap_pa2va((void *)tee_mm_get_smem(mm_param), &va); 598 if (res2 == TEE_SUCCESS) 599 tee_mmu_kunmap(va, tee_mm_get_bytes(mm_param)); 600 } 601 tee_mm_free(mm_param); 602 tee_svc_copy_kaddr_to_uref(sess, ta_sess, s); 603 tee_svc_copy_to_user(sess, ret_orig, &ret_o, sizeof(ret_o)); 604 605 out_free_only: 606 free(param); 607 free(uuid); 608 free(clnt_id); 609 return res; 610 } 611 612 TEE_Result syscall_close_ta_session(unsigned long ta_sess) 613 { 614 TEE_Result res; 615 struct tee_ta_session *sess; 616 TEE_Identity clnt_id; 617 struct tee_ta_session *s = tee_svc_uref_to_kaddr(ta_sess); 618 619 res = tee_ta_get_current_session(&sess); 620 if (res != TEE_SUCCESS) 621 return res; 622 623 clnt_id.login = TEE_LOGIN_TRUSTED_APP; 624 memcpy(&clnt_id.uuid, &sess->ctx->uuid, sizeof(TEE_UUID)); 625 626 tee_ta_set_current_session(NULL); 627 res = tee_ta_close_session(s, &sess->ctx->open_sessions, &clnt_id); 628 tee_ta_set_current_session(sess); 629 return res; 630 } 631 632 TEE_Result syscall_invoke_ta_command(unsigned long ta_sess, 633 unsigned long cancel_req_to, unsigned long cmd_id, 634 struct utee_params *usr_param, uint32_t *ret_orig) 635 { 636 TEE_Result res; 637 uint32_t ret_o = TEE_ORIGIN_TEE; 638 struct tee_ta_param param = { 0 }; 639 TEE_Identity clnt_id; 640 struct tee_ta_session *sess; 641 struct tee_ta_session *called_sess; 642 tee_mm_entry_t *mm_param = NULL; 643 tee_paddr_t tmp_buf_pa[TEE_NUM_PARAMS]; 644 645 res = tee_ta_get_current_session(&sess); 646 if (res != TEE_SUCCESS) 647 return res; 648 649 called_sess = tee_ta_get_session( 650 (vaddr_t)tee_svc_uref_to_kaddr(ta_sess), true, 651 &sess->ctx->open_sessions); 652 if (!called_sess) 653 return TEE_ERROR_BAD_PARAMETERS; 654 655 clnt_id.login = TEE_LOGIN_TRUSTED_APP; 656 memcpy(&clnt_id.uuid, &sess->ctx->uuid, sizeof(TEE_UUID)); 657 658 res = tee_svc_copy_param(sess, called_sess, usr_param, ¶m, 659 tmp_buf_pa, &mm_param); 660 if (res != TEE_SUCCESS) 661 goto function_exit; 662 663 res = tee_ta_invoke_command(&ret_o, called_sess, &clnt_id, 664 cancel_req_to, cmd_id, ¶m); 665 666 if (res != TEE_SUCCESS) 667 goto function_exit; 668 669 res = tee_svc_update_out_param(sess, called_sess, ¶m, tmp_buf_pa, 670 usr_param); 671 if (res != TEE_SUCCESS) 672 goto function_exit; 673 674 function_exit: 675 tee_ta_set_current_session(sess); 676 called_sess->calling_sess = NULL; /* clear eventual borrowed mapping */ 677 tee_ta_put_session(called_sess); 678 679 if (mm_param != NULL) { 680 TEE_Result res2; 681 void *va = 0; 682 683 res2 = 684 tee_mmu_kmap_pa2va((void *)tee_mm_get_smem(mm_param), &va); 685 if (res2 == TEE_SUCCESS) 686 tee_mmu_kunmap(va, tee_mm_get_bytes(mm_param)); 687 } 688 tee_mm_free(mm_param); 689 if (ret_orig) 690 tee_svc_copy_to_user(sess, ret_orig, &ret_o, sizeof(ret_o)); 691 return res; 692 } 693 694 TEE_Result syscall_check_access_rights(unsigned long flags, const void *buf, 695 size_t len) 696 { 697 TEE_Result res; 698 struct tee_ta_session *s; 699 700 res = tee_ta_get_current_session(&s); 701 if (res != TEE_SUCCESS) 702 return res; 703 704 return tee_mmu_check_access_rights(s->ctx, flags, (tee_uaddr_t)buf, 705 len); 706 } 707 708 TEE_Result tee_svc_copy_from_user(struct tee_ta_session *sess, void *kaddr, 709 const void *uaddr, size_t len) 710 { 711 TEE_Result res; 712 struct tee_ta_session *s; 713 714 if (sess == NULL) { 715 res = tee_ta_get_current_session(&s); 716 if (res != TEE_SUCCESS) 717 return res; 718 } else { 719 s = sess; 720 tee_ta_set_current_session(s); 721 } 722 res = 723 tee_mmu_check_access_rights(s->ctx, 724 TEE_MEMORY_ACCESS_READ | 725 TEE_MEMORY_ACCESS_ANY_OWNER, 726 (tee_uaddr_t)uaddr, len); 727 if (res != TEE_SUCCESS) 728 return res; 729 730 memcpy(kaddr, uaddr, len); 731 return TEE_SUCCESS; 732 } 733 734 TEE_Result tee_svc_copy_to_user(struct tee_ta_session *sess, void *uaddr, 735 const void *kaddr, size_t len) 736 { 737 TEE_Result res; 738 struct tee_ta_session *s; 739 740 if (sess == NULL) { 741 res = tee_ta_get_current_session(&s); 742 if (res != TEE_SUCCESS) 743 return res; 744 } else { 745 s = sess; 746 tee_ta_set_current_session(s); 747 } 748 749 res = 750 tee_mmu_check_access_rights(s->ctx, 751 TEE_MEMORY_ACCESS_WRITE | 752 TEE_MEMORY_ACCESS_ANY_OWNER, 753 (tee_uaddr_t)uaddr, len); 754 if (res != TEE_SUCCESS) 755 return res; 756 757 memcpy(uaddr, kaddr, len); 758 return TEE_SUCCESS; 759 } 760 761 TEE_Result tee_svc_copy_kaddr_to_uref(struct tee_ta_session *sess, 762 uint32_t *uref, void *kaddr) 763 { 764 uint32_t ref = tee_svc_kaddr_to_uref(kaddr); 765 766 return tee_svc_copy_to_user(sess, uref, &ref, sizeof(ref)); 767 } 768 769 static bool session_is_cancelled(struct tee_ta_session *s, TEE_Time *curr_time) 770 { 771 TEE_Time current_time; 772 773 if (s->cancel_mask) 774 return false; 775 776 if (s->cancel) 777 return true; 778 779 if (s->cancel_time.seconds == UINT32_MAX) 780 return false; 781 782 if (curr_time != NULL) 783 current_time = *curr_time; 784 else if (tee_time_get_sys_time(¤t_time) != TEE_SUCCESS) 785 return false; 786 787 if (current_time.seconds > s->cancel_time.seconds || 788 (current_time.seconds == s->cancel_time.seconds && 789 current_time.millis >= s->cancel_time.millis)) { 790 return true; 791 } 792 793 return false; 794 } 795 796 TEE_Result syscall_get_cancellation_flag(uint32_t *cancel) 797 { 798 TEE_Result res; 799 struct tee_ta_session *s = NULL; 800 uint32_t c; 801 802 res = tee_ta_get_current_session(&s); 803 if (res != TEE_SUCCESS) 804 return res; 805 806 c = session_is_cancelled(s, NULL); 807 808 return tee_svc_copy_to_user(s, cancel, &c, sizeof(c)); 809 } 810 811 TEE_Result syscall_unmask_cancellation(uint32_t *old_mask) 812 { 813 TEE_Result res; 814 struct tee_ta_session *s = NULL; 815 uint32_t m; 816 817 res = tee_ta_get_current_session(&s); 818 if (res != TEE_SUCCESS) 819 return res; 820 821 m = s->cancel_mask; 822 s->cancel_mask = false; 823 return tee_svc_copy_to_user(s, old_mask, &m, sizeof(m)); 824 } 825 826 TEE_Result syscall_mask_cancellation(uint32_t *old_mask) 827 { 828 TEE_Result res; 829 struct tee_ta_session *s = NULL; 830 uint32_t m; 831 832 res = tee_ta_get_current_session(&s); 833 if (res != TEE_SUCCESS) 834 return res; 835 836 m = s->cancel_mask; 837 s->cancel_mask = true; 838 return tee_svc_copy_to_user(s, old_mask, &m, sizeof(m)); 839 } 840 841 TEE_Result syscall_wait(unsigned long timeout) 842 { 843 TEE_Result res = TEE_SUCCESS; 844 uint32_t mytime = 0; 845 struct tee_ta_session *s; 846 TEE_Time base_time; 847 TEE_Time current_time; 848 849 res = tee_ta_get_current_session(&s); 850 if (res != TEE_SUCCESS) 851 return res; 852 853 res = tee_time_get_sys_time(&base_time); 854 if (res != TEE_SUCCESS) 855 return res; 856 857 while (true) { 858 res = tee_time_get_sys_time(¤t_time); 859 if (res != TEE_SUCCESS) 860 return res; 861 862 if (session_is_cancelled(s, ¤t_time)) 863 return TEE_ERROR_CANCEL; 864 865 mytime = (current_time.seconds - base_time.seconds) * 1000 + 866 (int)current_time.millis - (int)base_time.millis; 867 if (mytime >= timeout) 868 return TEE_SUCCESS; 869 870 tee_time_wait(timeout - mytime); 871 } 872 873 return res; 874 } 875 876 TEE_Result syscall_get_time(unsigned long cat, TEE_Time *mytime) 877 { 878 TEE_Result res, res2; 879 struct tee_ta_session *s = NULL; 880 TEE_Time t; 881 882 res = tee_ta_get_current_session(&s); 883 if (res != TEE_SUCCESS) 884 return res; 885 886 switch (cat) { 887 case UTEE_TIME_CAT_SYSTEM: 888 res = tee_time_get_sys_time(&t); 889 break; 890 case UTEE_TIME_CAT_TA_PERSISTENT: 891 res = tee_time_get_ta_time((const void *)&s->ctx->uuid, &t); 892 break; 893 case UTEE_TIME_CAT_REE: 894 res = tee_time_get_ree_time(&t); 895 break; 896 default: 897 res = TEE_ERROR_BAD_PARAMETERS; 898 break; 899 } 900 901 if (res == TEE_SUCCESS || res == TEE_ERROR_OVERFLOW) { 902 res2 = tee_svc_copy_to_user(s, mytime, &t, sizeof(t)); 903 if (res2 != TEE_SUCCESS) 904 res = res2; 905 } 906 907 return res; 908 } 909 910 TEE_Result syscall_set_ta_time(const TEE_Time *mytime) 911 { 912 TEE_Result res; 913 struct tee_ta_session *s = NULL; 914 TEE_Time t; 915 916 res = tee_ta_get_current_session(&s); 917 if (res != TEE_SUCCESS) 918 return res; 919 920 res = tee_svc_copy_from_user(s, &t, mytime, sizeof(t)); 921 if (res != TEE_SUCCESS) 922 return res; 923 924 return tee_time_set_ta_time((const void *)&s->ctx->uuid, &t); 925 } 926 927 #ifdef CFG_CACHE_API 928 TEE_Result syscall_cache_operation(void *va, size_t len, unsigned long op) 929 { 930 TEE_Result res; 931 struct tee_ta_session *s = NULL; 932 933 res = tee_ta_get_current_session(&s); 934 if (res != TEE_SUCCESS) 935 return res; 936 937 if ((s->ctx->flags & TA_FLAG_CACHE_MAINTENANCE) == 0) 938 return TEE_ERROR_NOT_SUPPORTED; 939 940 return tee_uta_cache_operation(s, op, va, len); 941 } 942 #endif 943