1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2019, Theobroma Systems Design und Consulting GmbH
4 */
5
6 #include <common.h>
7 #include <command.h>
8 #include <errno.h>
9 #include <fdt_support.h>
10 #include <log.h>
11 #include <malloc.h>
12 #include <tee/optee.h>
13
14 #include <linux/sizes.h>
15
16 #include <test/ut.h>
17 #include <test/optee.h>
18 #include <test/suites.h>
19
20 /* 4k ought to be enough for anybody */
21 #define FDT_COPY_SIZE (4 * SZ_1K)
22
23 extern u32 __dtb_test_optee_base_begin;
24 extern u32 __dtb_test_optee_optee_begin;
25 extern u32 __dtb_test_optee_no_optee_begin;
26
27 static void *fdt;
28 static bool expect_success;
29
optee_fdt_firmware(struct unit_test_state * uts)30 static int optee_fdt_firmware(struct unit_test_state *uts)
31 {
32 const void *prop;
33 int offs, len;
34
35 offs = fdt_path_offset(fdt, "/firmware/optee");
36 ut_assert(expect_success ? offs >= 0 : offs < 0);
37
38 /* only continue if we have an optee node */
39 if (offs < 0)
40 return CMD_RET_SUCCESS;
41
42 prop = fdt_getprop(fdt, offs, "compatible", &len);
43 ut_assertok(strncmp((const char *)prop, "linaro,optee-tz", len));
44
45 prop = fdt_getprop(fdt, offs, "method", &len);
46 ut_assert(strncmp(prop, "hvc", 3) == 0 || strncmp(prop, "smc", 3) == 0);
47
48 return CMD_RET_SUCCESS;
49 }
50 OPTEE_TEST(optee_fdt_firmware, 0);
51
optee_fdt_protected_memory(struct unit_test_state * uts)52 static int optee_fdt_protected_memory(struct unit_test_state *uts)
53 {
54 int offs, subnode;
55 bool found;
56
57 offs = fdt_path_offset(fdt, "/firmware/optee");
58 ut_assert(expect_success ? offs >= 0 : offs < 0);
59
60 /* only continue if we have an optee node */
61 if (offs < 0)
62 return CMD_RET_SUCCESS;
63
64 /* optee inserts its memory regions as reserved-memory nodes */
65 offs = fdt_subnode_offset(fdt, 0, "reserved-memory");
66 ut_assert(offs >= 0);
67
68 subnode = fdt_first_subnode(fdt, offs);
69 ut_assert(subnode);
70
71 found = 0;
72 while (subnode >= 0) {
73 const char *name = fdt_get_name(fdt, subnode, NULL);
74 struct fdt_resource res;
75
76 ut_assert(name);
77
78 /* only handle optee reservations */
79 if (strncmp(name, "optee", 5))
80 continue;
81
82 found = true;
83
84 /* check if this subnode has a reg property */
85 ut_assertok(fdt_get_resource(fdt, subnode, "reg", 0, &res));
86 subnode = fdt_next_subnode(fdt, subnode);
87 }
88
89 ut_assert(found);
90
91 return CMD_RET_SUCCESS;
92 }
93 OPTEE_TEST(optee_fdt_protected_memory, 0);
94
do_ut_optee(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])95 int do_ut_optee(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
96 {
97 struct unit_test *tests = UNIT_TEST_SUITE_START(optee_test);
98 const int n_ents = UNIT_TEST_SUITE_COUNT(optee_test);
99 struct unit_test_state *uts;
100 void *fdt_optee = &__dtb_test_optee_optee_begin;
101 void *fdt_no_optee = &__dtb_test_optee_no_optee_begin;
102 void *fdt_base = &__dtb_test_optee_base_begin;
103 int ret = -ENOMEM;
104
105 uts = calloc(1, sizeof(*uts));
106 if (!uts)
107 return -ENOMEM;
108
109 ut_assertok(fdt_check_header(fdt_base));
110 ut_assertok(fdt_check_header(fdt_optee));
111 ut_assertok(fdt_check_header(fdt_no_optee));
112
113 fdt = malloc(FDT_COPY_SIZE);
114 if (!fdt)
115 return ret;
116
117 /*
118 * Resize the FDT to 4k so that we have room to operate on
119 *
120 * (and relocate it since the memory might be mapped
121 * read-only)
122 */
123 ut_assertok(fdt_open_into(fdt_base, fdt, FDT_COPY_SIZE));
124
125 /*
126 * (1) Try to copy optee nodes from empty dt.
127 * This should still run successfully.
128 */
129 ut_assertok(optee_copy_fdt_nodes(fdt_no_optee, fdt));
130
131 expect_success = false;
132 ret = cmd_ut_category("optee", "", tests, n_ents, argc, argv);
133
134 /* (2) Try to copy optee nodes from prefilled dt */
135 ut_assertok(optee_copy_fdt_nodes(fdt_optee, fdt));
136
137 expect_success = true;
138 ret = cmd_ut_category("optee", "", tests, n_ents, argc, argv);
139
140 /* (3) Try to copy OP-TEE nodes into a already filled DT */
141 ut_assertok(fdt_open_into(fdt_optee, fdt, FDT_COPY_SIZE));
142 ut_assertok(optee_copy_fdt_nodes(fdt_optee, fdt));
143
144 expect_success = true;
145 ret = cmd_ut_category("optee", "", tests, n_ents, argc, argv);
146
147 free(fdt);
148 return ret;
149 }
150