Linux Audio

Check our new training course

Embedded Linux Audio

Check our new training course
with Creative Commons CC-BY-SA
lecture materials

Bootlin logo

Elixir Cross Referencer

Loading...
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
/*
 * Copyright (c) 2014, STMicroelectronics International N.V.
 * Copyright (c) 2015, Linaro Limited
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <compiler.h>
#include <keep.h>
#include <types_ext.h>
#include <stdlib.h>
#include <kernel/tee_ta_manager.h>
#include <kernel/thread.h>
#include <kernel/user_ta.h>
#include <mm/core_memprot.h>
#include <mm/core_mmu.h>
#include <mm/tee_mm.h>
#include <mm/tee_mmu.h>
#include <tee/tee_cryp_provider.h>
#include <tee/tee_cryp_utl.h>
#include <tee/tee_obj.h>
#include <tee/tee_svc_cryp.h>
#include <tee/tee_svc.h>
#include <tee/tee_svc_storage.h>
#include <signed_hdr.h>
#include <ta_pub_key.h>
#include <trace.h>
#include <utee_defines.h>
#include <util.h>

#include "elf_load.h"
#include "elf_common.h"

#define STACK_ALIGNMENT   (sizeof(long) * 2)

static TEE_Result load_header(const struct shdr *signed_ta,
		struct shdr **sec_shdr)
{
	size_t s;

	if (!tee_vbuf_is_non_sec(signed_ta, sizeof(*signed_ta)))
		return TEE_ERROR_SECURITY;

	s = SHDR_GET_SIZE(signed_ta);
	if (!tee_vbuf_is_non_sec(signed_ta, s))
		return TEE_ERROR_SECURITY;

	/* Copy signed header into secure memory */
	*sec_shdr = malloc(s);
	if (!*sec_shdr)
		return TEE_ERROR_OUT_OF_MEMORY;
	memcpy(*sec_shdr, signed_ta, s);

	return TEE_SUCCESS;
}

static TEE_Result check_shdr(struct shdr *shdr)
{
	struct rsa_public_key key;
	TEE_Result res;
	uint32_t e = TEE_U32_TO_BIG_ENDIAN(ta_pub_key_exponent);
	size_t hash_size;

	if (shdr->magic != SHDR_MAGIC || shdr->img_type != SHDR_TA)
		return TEE_ERROR_SECURITY;

	if (TEE_ALG_GET_MAIN_ALG(shdr->algo) != TEE_MAIN_ALGO_RSA)
		return TEE_ERROR_SECURITY;

	res = tee_hash_get_digest_size(TEE_DIGEST_HASH_TO_ALGO(shdr->algo),
				       &hash_size);
	if (res != TEE_SUCCESS)
		return res;
	if (hash_size != shdr->hash_size)
		return TEE_ERROR_SECURITY;

	if (!crypto_ops.acipher.alloc_rsa_public_key ||
	    !crypto_ops.acipher.free_rsa_public_key ||
	    !crypto_ops.acipher.rsassa_verify ||
	    !crypto_ops.bignum.bin2bn)
		return TEE_ERROR_NOT_SUPPORTED;

	res = crypto_ops.acipher.alloc_rsa_public_key(&key, shdr->sig_size);
	if (res != TEE_SUCCESS)
		return res;

	res = crypto_ops.bignum.bin2bn((uint8_t *)&e, sizeof(e), key.e);
	if (res != TEE_SUCCESS)
		goto out;
	res = crypto_ops.bignum.bin2bn(ta_pub_key_modulus,
				       ta_pub_key_modulus_size, key.n);
	if (res != TEE_SUCCESS)
		goto out;

	res = crypto_ops.acipher.rsassa_verify(shdr->algo, &key, -1,
				SHDR_GET_HASH(shdr), shdr->hash_size,
				SHDR_GET_SIG(shdr), shdr->sig_size);
out:
	crypto_ops.acipher.free_rsa_public_key(&key);
	if (res != TEE_SUCCESS)
		return TEE_ERROR_SECURITY;
	return TEE_SUCCESS;
}

static uint32_t elf_flags_to_mattr(uint32_t flags, bool init_attrs)
{
	uint32_t mattr = TEE_MATTR_PRW;

	if (!init_attrs) {
		if (flags & PF_X)
			mattr |= TEE_MATTR_UX;
		if (flags & PF_W)
			mattr |= TEE_MATTR_UW;
		if (flags & PF_R)
			mattr |= TEE_MATTR_UR;
	}

	return mattr;
}

static TEE_Result load_elf_segments(struct user_ta_ctx *utc,
			struct elf_load_state *elf_state, bool init_attrs)
{
	TEE_Result res;
	paddr_t pa;
	uint32_t mattr;
	size_t idx = 0;

	tee_mmu_map_clear(utc);
	/*
	 * Add stack segment
	 */
	pa = tee_mm_get_smem(utc->mm_stack);
	mattr = elf_flags_to_mattr(PF_W | PF_R, init_attrs);
	tee_mmu_map_stack(utc, pa, tee_mm_get_bytes(utc->mm_stack), mattr);

	/*
	 * Add code segment
	 */
	pa = tee_mm_get_smem(utc->mm);
	while (true) {
		vaddr_t offs;
		size_t size;
		uint32_t flags;

		res = elf_load_get_next_segment(elf_state, &idx, &offs, &size,
						&flags);
		if (res == TEE_ERROR_ITEM_NOT_FOUND)
			return TEE_SUCCESS;
		if (res != TEE_SUCCESS)
			return res;

		mattr = elf_flags_to_mattr(flags, init_attrs);
		res = tee_mmu_map_add_segment(utc, pa, offs, size, mattr);
		if (res != TEE_SUCCESS)
			return res;
	}
}

static TEE_Result load_elf(struct user_ta_ctx *utc, struct shdr *shdr,
			const struct shdr *nmem_shdr)
{
	TEE_Result res;
	size_t hash_ctx_size;
	void *hash_ctx = NULL;
	uint32_t hash_algo;
	uint8_t *nwdata = (uint8_t *)nmem_shdr + SHDR_GET_SIZE(shdr);
	size_t nwdata_len = shdr->img_size;
	void *digest = NULL;
	struct elf_load_state *elf_state = NULL;
	struct ta_head *ta_head;
	void *p;
	size_t vasize;

	if (!tee_vbuf_is_non_sec(nwdata, nwdata_len))
		return TEE_ERROR_SECURITY;

	if (!crypto_ops.hash.get_ctx_size || !crypto_ops.hash.init ||
	    !crypto_ops.hash.update || !crypto_ops.hash.final) {
		res = TEE_ERROR_NOT_IMPLEMENTED;
		goto out;
	}
	hash_algo = TEE_DIGEST_HASH_TO_ALGO(shdr->algo);
	res = crypto_ops.hash.get_ctx_size(hash_algo, &hash_ctx_size);
	if (res != TEE_SUCCESS)
		goto out;
	hash_ctx = malloc(hash_ctx_size);
	if (!hash_ctx) {
		res = TEE_ERROR_OUT_OF_MEMORY;
		goto out;
	}
	res = crypto_ops.hash.init(hash_ctx, hash_algo);
	if (res != TEE_SUCCESS)
		goto out;
	res = crypto_ops.hash.update(hash_ctx, hash_algo,
				     (uint8_t *)shdr, sizeof(struct shdr));
	if (res != TEE_SUCCESS)
		goto out;

	res = elf_load_init(hash_ctx, hash_algo, nwdata, nwdata_len,
			    &elf_state);
	if (res != TEE_SUCCESS)
		goto out;

	res = elf_load_head(elf_state, sizeof(struct ta_head), &p, &vasize,
			    &utc->is_32bit);
	if (res != TEE_SUCCESS)
		goto out;
	ta_head = p;

	utc->mm = tee_mm_alloc(&tee_mm_sec_ddr, vasize);
	if (!utc->mm) {
		res = TEE_ERROR_OUT_OF_MEMORY;
		goto out;
	}

	/* Currently all TA must execute from DDR */
	if (!(ta_head->flags & TA_FLAG_EXEC_DDR)) {
		res = TEE_ERROR_BAD_FORMAT;
		goto out;
	}
	/* Temporary assignment to setup memory mapping */
	utc->ctx.flags = TA_FLAG_USER_MODE | TA_FLAG_EXEC_DDR;

	/* Ensure proper aligment of stack */
	utc->stack_size = ROUNDUP(ta_head->stack_size, STACK_ALIGNMENT);

	utc->mm_stack = tee_mm_alloc(&tee_mm_sec_ddr, utc->stack_size);
	if (!utc->mm_stack) {
		EMSG("Failed to allocate %zu bytes for user stack",
		     utc->stack_size);
		res = TEE_ERROR_OUT_OF_MEMORY;
		goto out;
	}

	/*
	 * Map physical memory into TA virtual memory
	 */

	res = tee_mmu_init(utc);
	if (res != TEE_SUCCESS)
		goto out;

	res = load_elf_segments(utc, elf_state, true /* init attrs */);
	if (res != TEE_SUCCESS)
		goto out;

	tee_mmu_set_ctx(&utc->ctx);

	res = elf_load_body(elf_state, tee_mmu_get_load_addr(&utc->ctx));
	if (res != TEE_SUCCESS)
		goto out;

	digest = malloc(shdr->hash_size);
	if (!digest) {
		res = TEE_ERROR_OUT_OF_MEMORY;
		goto out;
	}

	res = crypto_ops.hash.final(hash_ctx, hash_algo, digest,
				    shdr->hash_size);
	if (res != TEE_SUCCESS)
		goto out;

	if (memcmp(digest, SHDR_GET_HASH(shdr), shdr->hash_size) != 0) {
		res = TEE_ERROR_SECURITY;
		goto out;
	}

	/*
	 * Replace the init attributes with attributes used when the TA is
	 * running.
	 */
	res = load_elf_segments(utc, elf_state, false /* final attrs */);
	if (res != TEE_SUCCESS)
		goto out;

	cache_maintenance_l1(DCACHE_AREA_CLEAN,
			     (void *)tee_mmu_get_load_addr(&utc->ctx), vasize);
	cache_maintenance_l1(ICACHE_AREA_INVALIDATE,
			     (void *)tee_mmu_get_load_addr(&utc->ctx), vasize);
out:
	elf_load_final(elf_state);
	free(digest);
	free(hash_ctx);
	return res;
}

/*-----------------------------------------------------------------------------
 * Loads TA header and hashes.
 * Verifies the TA signature.
 * Returns context ptr and TEE_Result.
 *---------------------------------------------------------------------------*/
static TEE_Result ta_load(const TEE_UUID *uuid, const struct shdr *signed_ta,
			struct tee_ta_ctx **ta_ctx)
{
	TEE_Result res;
	/* man_flags: mandatory flags */
	uint32_t man_flags = TA_FLAG_USER_MODE | TA_FLAG_EXEC_DDR;
	/* opt_flags: optional flags */
	uint32_t opt_flags = man_flags | TA_FLAG_SINGLE_INSTANCE |
	    TA_FLAG_MULTI_SESSION | TA_FLAG_UNSAFE_NW_PARAMS |
	    TA_FLAG_INSTANCE_KEEP_ALIVE;
	struct user_ta_ctx *utc = NULL;
	struct shdr *sec_shdr = NULL;
	struct ta_head *ta_head;

	res = load_header(signed_ta, &sec_shdr);
	if (res != TEE_SUCCESS)
		goto error_return;

	res = check_shdr(sec_shdr);
	if (res != TEE_SUCCESS)
		goto error_return;

	/*
	 * ------------------------------------------------------------------
	 * 2nd step: Register context
	 * Alloc and init the ta context structure, alloc physical/virtual
	 * memories to store/map the TA.
	 * ------------------------------------------------------------------
	 */

	/*
	 * Register context
	 */

	/* code below must be protected by mutex (multi-threaded) */
	utc = calloc(1, sizeof(struct user_ta_ctx));
	if (!utc) {
		res = TEE_ERROR_OUT_OF_MEMORY;
		goto error_return;
	}
	TAILQ_INIT(&utc->open_sessions);
	TAILQ_INIT(&utc->cryp_states);
	TAILQ_INIT(&utc->objects);
	TAILQ_INIT(&utc->storage_enums);
#if defined(CFG_SE_API)
	utc->se_service = NULL;
#endif

	res = load_elf(utc, sec_shdr, signed_ta);
	if (res != TEE_SUCCESS)
		goto error_return;

	utc->load_addr = tee_mmu_get_load_addr(&utc->ctx);
	ta_head = (struct ta_head *)(vaddr_t)utc->load_addr;

	if (memcmp(&ta_head->uuid, uuid, sizeof(TEE_UUID)) != 0) {
		res = TEE_ERROR_SECURITY;
		goto error_return;
	}

	/* check input flags bitmask consistency and save flags */
	if ((ta_head->flags & opt_flags) != ta_head->flags ||
	    (ta_head->flags & man_flags) != man_flags) {
		EMSG("TA flag issue: flags=%x opt=%X man=%X",
		     ta_head->flags, opt_flags, man_flags);
		res = TEE_ERROR_BAD_FORMAT;
		goto error_return;
	}

	utc->ctx.flags = ta_head->flags;
	utc->ctx.uuid = ta_head->uuid;
	utc->entry_func = ta_head->entry.ptr64;

	utc->ctx.ref_count = 1;

	condvar_init(&utc->ctx.busy_cv);
	TAILQ_INSERT_TAIL(&tee_ctxes, &utc->ctx, link);
	*ta_ctx = &utc->ctx;

	DMSG("Loaded TA at 0x%" PRIxPTR, tee_mm_get_smem(utc->mm));
	DMSG("ELF load address 0x%x", utc->load_addr);

	tee_mmu_set_ctx(NULL);
	/* end thread protection (multi-threaded) */

	free(sec_shdr);
	return TEE_SUCCESS;

error_return:
	free(sec_shdr);
	tee_mmu_set_ctx(NULL);
	if (utc) {
		tee_mmu_final(utc);
		tee_mm_free(utc->mm_stack);
		tee_mm_free(utc->mm);
		free(utc);
	}
	return res;
}

static void init_utee_param(struct utee_params *up,
			const struct tee_ta_param *p)
{
	size_t n;

	up->types = p->types;
	for (n = 0; n < TEE_NUM_PARAMS; n++) {
		uintptr_t a;
		uintptr_t b;

		switch (TEE_PARAM_TYPE_GET(p->types, n)) {
		case TEE_PARAM_TYPE_MEMREF_INPUT:
		case TEE_PARAM_TYPE_MEMREF_OUTPUT:
		case TEE_PARAM_TYPE_MEMREF_INOUT:
			a = (uintptr_t)p->params[n].memref.buffer;
			b = p->params[n].memref.size;
			break;
		case TEE_PARAM_TYPE_VALUE_INPUT:
		case TEE_PARAM_TYPE_VALUE_INOUT:
			a = p->params[n].value.a;
			b = p->params[n].value.b;
			break;
		default:
			a = 0;
			b = 0;
			break;
		}
		/* See comment for struct utee_params in utee_types.h */
		up->vals[n * 2] = a;
		up->vals[n * 2 + 1] = b;
	}
}

static void update_from_utee_param(struct tee_ta_param *p,
			const struct utee_params *up)
{
	size_t n;

	for (n = 0; n < TEE_NUM_PARAMS; n++) {
		switch (TEE_PARAM_TYPE_GET(p->types, n)) {
		case TEE_PARAM_TYPE_MEMREF_OUTPUT:
		case TEE_PARAM_TYPE_MEMREF_INOUT:
			/* See comment for struct utee_params in utee_types.h */
			p->params[n].memref.size = up->vals[n * 2 + 1];
			break;
		case TEE_PARAM_TYPE_VALUE_OUTPUT:
		case TEE_PARAM_TYPE_VALUE_INOUT:
			/* See comment for struct utee_params in utee_types.h */
			p->params[n].value.a = up->vals[n * 2];
			p->params[n].value.b = up->vals[n * 2 + 1];
			break;
		default:
			break;
		}
	}
}

static void clear_vfp_state(struct user_ta_ctx *utc __unused)
{
#ifdef CFG_WITH_VFP
	thread_user_clear_vfp(&utc->vfp);
#endif
}

static TEE_Result user_ta_enter(TEE_ErrorOrigin *err,
			struct tee_ta_session *session,
			enum utee_entry_func func, uint32_t cmd,
			struct tee_ta_param *param)
{
	TEE_Result res;
	struct utee_params *usr_params;
	tee_uaddr_t usr_stack;
	struct user_ta_ctx *utc = to_user_ta_ctx(session->ctx);
	TEE_ErrorOrigin serr = TEE_ORIGIN_TEE;

	TEE_ASSERT((utc->ctx.flags & TA_FLAG_EXEC_DDR) != 0);

	/* Map user space memory */
	res = tee_mmu_map_param(utc, param);
	if (res != TEE_SUCCESS)
		goto cleanup_return;

	/* Switch to user ctx */
	tee_ta_set_current_session(session);

	/* Make room for usr_params at top of stack */
	usr_stack = (tee_uaddr_t)phys_to_virt(tee_mm_get_smem(utc->mm_stack) +
				 utc->stack_size - 1, MEM_AREA_TA_VASPACE) + 1;
	usr_stack -= ROUNDUP(sizeof(struct utee_params), STACK_ALIGNMENT);
	usr_params = (struct utee_params *)usr_stack;
	init_utee_param(usr_params, param);

	res = thread_enter_user_mode(func, tee_svc_kaddr_to_uref(session),
				     (vaddr_t)usr_params, cmd, usr_stack,
				     utc->entry_func, utc->is_32bit,
				     &utc->ctx.panicked, &utc->ctx.panic_code);

	clear_vfp_state(utc);
	/*
	 * According to GP spec the origin should allways be set to the
	 * TA after TA execution
	 */
	serr = TEE_ORIGIN_TRUSTED_APP;

	if (utc->ctx.panicked) {
		DMSG("tee_user_ta_enter: TA panicked with code 0x%x\n",
		     utc->ctx.panic_code);
		serr = TEE_ORIGIN_TEE;
		res = TEE_ERROR_TARGET_DEAD;
	}

	/* Copy out value results */
	update_from_utee_param(param, usr_params);

cleanup_return:
	/* Restore original ROM mapping */
	tee_ta_set_current_session(NULL);

	/*
	 * Clear the cancel state now that the user TA has returned. The next
	 * time the TA will be invoked will be with a new operation and should
	 * not have an old cancellation pending.
	 */
	session->cancel = false;

	/*
	 * Can't update *err until now since it may point to an address
	 * mapped for the user mode TA.
	 */
	*err = serr;

	return res;
}

/*
 * Load a TA via RPC with UUID defined by input param uuid. The virtual
 * address of the TA is recieved in out parameter ta
 *
 * Function is not thread safe
 */
static TEE_Result rpc_load(const TEE_UUID *uuid, struct shdr **ta,
			uint64_t *cookie_ta)
{
	TEE_Result res;
	struct optee_msg_param params[2];
	paddr_t phta = 0;
	uint64_t cta = 0;


	if (!uuid || !ta || !cookie_ta)
		return TEE_ERROR_BAD_PARAMETERS;

	memset(params, 0, sizeof(params));
	params[0].attr = OPTEE_MSG_ATTR_TYPE_VALUE_INPUT;
	memcpy(&params[0].u.value, uuid, sizeof(TEE_UUID));
	params[1].attr = OPTEE_MSG_ATTR_TYPE_TMEM_OUTPUT;
	params[1].u.tmem.buf_ptr = 0;
	params[1].u.tmem.size = 0;
	params[1].u.tmem.shm_ref = 0;

	res = thread_rpc_cmd(OPTEE_MSG_RPC_CMD_LOAD_TA, 2, params);
	if (res != TEE_SUCCESS)
		return res;

	thread_rpc_alloc_payload(params[1].u.tmem.size, &phta, &cta);
	if (!phta)
		return TEE_ERROR_OUT_OF_MEMORY;

	*ta = phys_to_virt(phta, MEM_AREA_NSEC_SHM);
	if (!*ta) {
		res = TEE_ERROR_GENERIC;
		goto out;
	}
	*cookie_ta = cta;

	params[0].attr = OPTEE_MSG_ATTR_TYPE_VALUE_INPUT;
	memcpy(&params[0].u.value, uuid, sizeof(TEE_UUID));
	params[1].attr = OPTEE_MSG_ATTR_TYPE_TMEM_OUTPUT;
	params[1].u.tmem.buf_ptr = phta;
	params[1].u.tmem.shm_ref = cta;
	/* Note that params[1].u.tmem.size is already assigned */

	res = thread_rpc_cmd(OPTEE_MSG_RPC_CMD_LOAD_TA, 2, params);
out:
	if (res != TEE_SUCCESS)
		thread_rpc_free_payload(cta);
	return res;
}

static TEE_Result init_session_with_signed_ta(const TEE_UUID *uuid,
				const struct shdr *signed_ta,
				struct tee_ta_session *s)
{
	TEE_Result res;

	DMSG("   Load dynamic TA");
	/* load and verify */
	res = ta_load(uuid, signed_ta, &s->ctx);
	if (res != TEE_SUCCESS)
		return res;

	DMSG("      dyn TA : %pUl", (void *)&s->ctx->uuid);

	return res;
}

static TEE_Result user_ta_enter_open_session(struct tee_ta_session *s,
			struct tee_ta_param *param, TEE_ErrorOrigin *eo)
{
	return user_ta_enter(eo, s, UTEE_ENTRY_FUNC_OPEN_SESSION, 0, param);
}

static TEE_Result user_ta_enter_invoke_cmd(struct tee_ta_session *s,
			uint32_t cmd, struct tee_ta_param *param,
			TEE_ErrorOrigin *eo)
{
	return user_ta_enter(eo, s, UTEE_ENTRY_FUNC_INVOKE_COMMAND, cmd, param);
}

static void user_ta_enter_close_session(struct tee_ta_session *s)
{
	TEE_ErrorOrigin eo;
	struct tee_ta_param param = { 0 };

	user_ta_enter(&eo, s, UTEE_ENTRY_FUNC_CLOSE_SESSION, 0, &param);
}

static void user_ta_dump_state(struct tee_ta_ctx *ctx)
{
	struct user_ta_ctx *utc __maybe_unused = to_user_ta_ctx(ctx);

	EMSG_RAW("- load addr : 0x%x    ctx-idr: %d",
		 utc->load_addr, utc->context);
	EMSG_RAW("- code area : 0x%" PRIxPTR " %zu",
		 tee_mm_get_smem(utc->mm), tee_mm_get_bytes(utc->mm));
	EMSG_RAW("- stack: 0x%" PRIxPTR " stack:%zu",
		 tee_mm_get_smem(utc->mm_stack), utc->stack_size);
}
KEEP_PAGER(user_ta_dump_state);

static void user_ta_ctx_destroy(struct tee_ta_ctx *ctx)
{
	struct user_ta_ctx *utc = to_user_ta_ctx(ctx);

	/*
	 * Clean all traces of the TA, both RO and RW data.
	 * No L2 cache maintenance to avoid sync problems
	 */
	if (ctx->flags & TA_FLAG_EXEC_DDR) {
		paddr_t pa;
		void *va;
		uint32_t s;

		tee_mmu_set_ctx(ctx);

		if (utc->mm != NULL) {
			pa = tee_mm_get_smem(utc->mm);
			va = phys_to_virt(pa, MEM_AREA_TA_VASPACE);
			if (va) {
				s = tee_mm_get_bytes(utc->mm);
				memset(va, 0, s);
				cache_maintenance_l1(DCACHE_AREA_CLEAN, va, s);
			}
		}

		if (utc->mm_stack) {
			pa = tee_mm_get_smem(utc->mm_stack);
			va = phys_to_virt(pa, MEM_AREA_TA_VASPACE);
			if (va) {
				s = tee_mm_get_bytes(utc->mm_stack);
				memset(va, 0, s);
				cache_maintenance_l1(DCACHE_AREA_CLEAN, va, s);
			}
		}
		tee_mmu_set_ctx(NULL);
	}

	/*
	 * Close sessions opened by this TA
	 * Note that tee_ta_close_session() removes the item
	 * from the utc->open_sessions list.
	 */
	while (!TAILQ_EMPTY(&utc->open_sessions)) {
		tee_ta_close_session(TAILQ_FIRST(&utc->open_sessions),
				     &utc->open_sessions, KERN_IDENTITY);
	}

	tee_mmu_final(utc);
	tee_mm_free(utc->mm_stack);
	tee_mm_free(utc->mm);

	/* Free cryp states created by this TA */
	tee_svc_cryp_free_states(utc);
	/* Close cryp objects opened by this TA */
	tee_obj_close_all(utc);
	/* Free emums created by this TA */
	tee_svc_storage_close_all_enum(utc);

	free(utc);
}

static const struct tee_ta_ops user_ta_ops __rodata_unpaged = {
	.enter_open_session = user_ta_enter_open_session,
	.enter_invoke_cmd = user_ta_enter_invoke_cmd,
	.enter_close_session = user_ta_enter_close_session,
	.dump_state = user_ta_dump_state,
	.destroy = user_ta_ctx_destroy,
};

TEE_Result tee_ta_init_user_ta_session(const TEE_UUID *uuid,
			struct tee_ta_session *s)
{
	TEE_Result res;
	struct shdr *ta = NULL;
	uint64_t cookie_ta = 0;


	/* Request TA from tee-supplicant */
	res = rpc_load(uuid, &ta, &cookie_ta);
	if (res != TEE_SUCCESS)
		return res;

	res = init_session_with_signed_ta(uuid, ta, s);
	/*
	 * Free normal world shared memory now that the TA either has been
	 * copied into secure memory or the TA failed to be initialized.
	 */
	thread_rpc_free_payload(cookie_ta);

	if (res == TEE_SUCCESS)
		s->ctx->ops = &user_ta_ops;
	return res;
}