1 // SPDX-License-Identifier: GPL-2.0+
3 * efi_selftest_variables
5 * Copyright (c) 2018 Heinrich Schuchardt <xypron.glpk@gmx.de>
7 * This unit test checks the runtime services for variables:
8 * GetVariable, GetNextVariableName, SetVariable, QueryVariableInfo.
11 #include <efi_selftest.h>
13 #define EFI_ST_MAX_DATA_SIZE 16
14 #define EFI_ST_MAX_VARNAME_SIZE 40
16 static struct efi_boot_services *boottime;
17 static struct efi_runtime_services *runtime;
18 static const efi_guid_t guid_vendor0 =
19 EFI_GUID(0x67029eb5, 0x0af2, 0xf6b1,
20 0xda, 0x53, 0xfc, 0xb5, 0x66, 0xdd, 0x1c, 0xe6);
21 static const efi_guid_t guid_vendor1 =
22 EFI_GUID(0xff629290, 0x1fc1, 0xd73f,
23 0x8f, 0xb1, 0x32, 0xf9, 0x0c, 0xa0, 0x42, 0xea);
28 * @handle handle of the loaded image
29 * @systable system table
31 static int setup(const efi_handle_t img_handle,
32 const struct efi_system_table *systable)
34 boottime = systable->boottime;
35 runtime = systable->runtime;
37 return EFI_ST_SUCCESS;
43 static int execute(void)
48 u8 v[16] = {0x5d, 0xd1, 0x5e, 0x51, 0x5a, 0x05, 0xc7, 0x0c,
49 0x35, 0x4a, 0xae, 0x87, 0xa5, 0xdf, 0x0f, 0x65,};
50 u8 data[EFI_ST_MAX_DATA_SIZE];
51 u16 varname[EFI_ST_MAX_VARNAME_SIZE];
54 u64 max_storage, rem_storage, max_size;
56 ret = runtime->query_variable_info(EFI_VARIABLE_BOOTSERVICE_ACCESS,
57 &max_storage, &rem_storage,
59 if (ret != EFI_SUCCESS) {
60 efi_st_todo("QueryVariableInfo failed\n");
61 } else if (!max_storage || !rem_storage || !max_size) {
62 efi_st_error("QueryVariableInfo: wrong info\n");
63 return EFI_ST_FAILURE;
66 ret = runtime->set_variable(L"efi_st_var0", &guid_vendor0,
67 EFI_VARIABLE_BOOTSERVICE_ACCESS,
69 if (ret != EFI_SUCCESS) {
70 efi_st_error("SetVariable failed\n");
71 return EFI_ST_FAILURE;
75 ret = runtime->get_variable(L"efi_st_var0", &guid_vendor0,
77 if (ret != EFI_SUCCESS) {
78 efi_st_error("GetVariable failed\n");
79 return EFI_ST_FAILURE;
81 if (memcmp(data, v + 4, 3)) {
82 efi_st_error("GetVariable returned wrong value\n");
83 return EFI_ST_FAILURE;
85 if (data[3] != 0xff) {
86 efi_st_error("GetVariable wrote past the end of the buffer\n");
87 return EFI_ST_FAILURE;
90 ret = runtime->set_variable(L"efi_st_var1", &guid_vendor1,
91 EFI_VARIABLE_BOOTSERVICE_ACCESS,
93 if (ret != EFI_SUCCESS) {
94 efi_st_error("SetVariable failed\n");
95 return EFI_ST_FAILURE;
97 len = EFI_ST_MAX_DATA_SIZE;
98 ret = runtime->get_variable(L"efi_st_var1", &guid_vendor1,
100 if (ret != EFI_SUCCESS) {
101 efi_st_error("GetVariable failed\n");
102 return EFI_ST_FAILURE;
105 efi_st_error("GetVariable returned wrong length %u\n",
107 return EFI_ST_FAILURE;
109 if (memcmp(data, v, 8)) {
110 efi_st_error("GetVariable returned wrong value\n");
111 return EFI_ST_FAILURE;
113 /* Append variable 1 */
114 ret = runtime->set_variable(L"efi_st_var1", &guid_vendor1,
115 EFI_VARIABLE_BOOTSERVICE_ACCESS |
116 EFI_VARIABLE_APPEND_WRITE,
118 if (ret != EFI_SUCCESS) {
119 efi_st_error("SetVariable failed\n");
120 return EFI_ST_FAILURE;
122 len = EFI_ST_MAX_DATA_SIZE;
123 ret = runtime->get_variable(L"efi_st_var1", &guid_vendor1,
125 if (ret != EFI_SUCCESS) {
126 efi_st_error("GetVariable failed\n");
127 return EFI_ST_FAILURE;
130 efi_st_todo("GetVariable returned wrong length %u\n",
132 if (memcmp(data, v, len))
133 efi_st_todo("GetVariable returned wrong value\n");
134 /* Enumerate variables */
135 boottime->set_mem(&guid, 16, 0);
139 len = EFI_ST_MAX_VARNAME_SIZE;
140 ret = runtime->get_next_variable_name(&len, varname, &guid);
141 if (ret == EFI_NOT_FOUND)
143 if (ret != EFI_SUCCESS) {
144 efi_st_error("GetNextVariableName failed (%u)\n",
146 return EFI_ST_FAILURE;
148 if (!memcmp(&guid, &guid_vendor0, sizeof(efi_guid_t)) &&
149 !efi_st_strcmp_16_8(varname, "efi_st_var0"))
151 if (!memcmp(&guid, &guid_vendor1, sizeof(efi_guid_t)) &&
152 !efi_st_strcmp_16_8(varname, "efi_st_var1"))
157 "GetNextVariableName did not return all variables\n");
158 return EFI_ST_FAILURE;
160 /* Delete variable 1 */
161 ret = runtime->set_variable(L"efi_st_var1", &guid_vendor1,
163 if (ret != EFI_SUCCESS) {
164 efi_st_error("SetVariable failed\n");
165 return EFI_ST_FAILURE;
167 len = EFI_ST_MAX_DATA_SIZE;
168 ret = runtime->get_variable(L"efi_st_var1", &guid_vendor1,
170 if (ret != EFI_NOT_FOUND) {
171 efi_st_error("Variable was not deleted\n");
172 return EFI_ST_FAILURE;
174 /* Delete variable 0 */
175 ret = runtime->set_variable(L"efi_st_var0", &guid_vendor0,
177 if (ret != EFI_SUCCESS) {
178 efi_st_error("SetVariable failed\n");
179 return EFI_ST_FAILURE;
181 len = EFI_ST_MAX_DATA_SIZE;
182 ret = runtime->get_variable(L"efi_st_var0", &guid_vendor0,
184 if (ret != EFI_NOT_FOUND) {
185 efi_st_error("Variable was not deleted\n");
186 return EFI_ST_FAILURE;
189 return EFI_ST_SUCCESS;
192 EFI_UNIT_TEST(variables) = {
194 .phase = EFI_EXECUTE_BEFORE_BOOTTIME_EXIT,