1 /*
2 * Copyright (C) 2022 Huawei Technologies Co., Ltd.
3 * Decription: check compatibility between tzdriver and tee.
4 *
5 * This software is licensed under the terms of the GNU General Public
6 * License version 2, as published by the Free Software Foundation, and
7 * may be copied, distributed, and modified under those terms.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 */
14
15 #include "tee_compat_check.h"
16 #include <linux/types.h>
17 #include <linux/err.h>
18 #include "teek_ns_client.h"
19 #include "tc_ns_log.h"
20
check_teeos_compat_level(const uint32_t * buffer,uint32_t size)21 int32_t check_teeos_compat_level(const uint32_t *buffer, uint32_t size)
22 {
23 const uint16_t major = TEEOS_COMPAT_LEVEL_MAJOR;
24 const uint16_t minor = TEEOS_COMPAT_LEVEL_MINOR;
25
26 if (!buffer || size != COMPAT_LEVEL_BUF_LEN) {
27 tloge("check teeos compat level failed, invalid param\n");
28 return -EINVAL;
29 }
30
31 if (buffer[0] != VER_CHECK_MAGIC_NUM) {
32 tloge("check ver magic num %u failed\n", buffer[0]);
33 return -EPERM;
34 }
35 if (buffer[1] != major) {
36 tloge("check major ver failed, tzdriver expect teeos version=%u, actual teeos version=%u\n",
37 major, buffer[1]);
38 return -EPERM;
39 }
40 /* just print warning */
41 if (buffer[2] != minor)
42 tlogw("check minor ver failed, tzdriver expect teeos minor version=%u, actual minor teeos version=%u\n",
43 minor, buffer[2]);
44
45 return 0;
46 }