6 * SPDX-License-Identifier: GPL-2.0+
8 * This unit test uses timer events to check the handling of
9 * task priority levels.
12 #include <efi_selftest.h>
14 static struct efi_event *event_notify;
15 static struct efi_event *event_wait;
16 static unsigned int notification_count;
17 static struct efi_boot_services *boottime;
20 * Notification function, increments the notification count.
22 * @event notified event
23 * @context pointer to the notification count
25 static void EFIAPI notify(struct efi_event *event, void *context)
27 unsigned int *count = context;
36 * Create two timer events.
37 * One with EVT_NOTIFY_SIGNAL, the other with EVT_NOTIFY_WAIT.
39 * @handle: handle of the loaded image
40 * @systable: system table
41 * @return: EFI_ST_SUCCESS for success
43 static int setup(const efi_handle_t handle,
44 const struct efi_system_table *systable)
48 boottime = systable->boottime;
50 ret = boottime->create_event(EVT_TIMER | EVT_NOTIFY_SIGNAL,
52 (void *)¬ification_count,
54 if (ret != EFI_SUCCESS) {
55 efi_st_error("could not create event\n");
56 return EFI_ST_FAILURE;
58 ret = boottime->create_event(EVT_TIMER | EVT_NOTIFY_WAIT,
59 TPL_HIGH_LEVEL, notify, NULL, &event_wait);
60 if (ret != EFI_SUCCESS) {
61 efi_st_error("could not create event\n");
62 return EFI_ST_FAILURE;
64 return EFI_ST_SUCCESS;
68 * Tear down unit test.
70 * Close the events created in setup.
72 * @return: EFI_ST_SUCCESS for success
74 static int teardown(void)
79 ret = boottime->close_event(event_notify);
81 if (ret != EFI_SUCCESS) {
82 efi_st_error("could not close event\n");
83 return EFI_ST_FAILURE;
87 ret = boottime->close_event(event_wait);
89 if (ret != EFI_SUCCESS) {
90 efi_st_error("could not close event\n");
91 return EFI_ST_FAILURE;
94 boottime->restore_tpl(TPL_APPLICATION);
95 return EFI_ST_SUCCESS;
101 * Run a 10 ms periodic timer and check that it is called 10 times
102 * while waiting for 100 ms single shot timer.
104 * Raise the TPL level to the level of the 10 ms timer and observe
105 * that the notification function is not called again.
107 * Lower the TPL level and check that the queued notification
108 * function is called.
110 * @return: EFI_ST_SUCCESS for success
112 static int execute(void)
118 /* Set 10 ms timer */
119 notification_count = 0;
120 ret = boottime->set_timer(event_notify, EFI_TIMER_PERIODIC, 100000);
121 if (ret != EFI_SUCCESS) {
122 efi_st_error("Could not set timer\n");
123 return EFI_ST_FAILURE;
125 /* Set 100 ms timer */
126 ret = boottime->set_timer(event_wait, EFI_TIMER_RELATIVE, 1000000);
127 if (ret != EFI_SUCCESS) {
128 efi_st_error("Could not set timer\n");
129 return EFI_ST_FAILURE;
132 ret = boottime->wait_for_event(1, &event_wait, &index);
133 if (ret != EFI_SUCCESS) {
134 efi_st_error("Could not wait for event\n");
135 return EFI_ST_FAILURE;
137 ret = boottime->check_event(event_wait);
138 if (ret != EFI_NOT_READY) {
139 efi_st_error("Signaled state was not cleared.\n");
140 efi_st_printf("ret = %u\n", (unsigned int)ret);
141 return EFI_ST_FAILURE;
144 efi_st_error("WaitForEvent returned wrong index\n");
145 return EFI_ST_FAILURE;
147 efi_st_printf("Notification count with TPL level TPL_APPLICATION: %u\n",
149 if (notification_count < 8 || notification_count > 12) {
150 efi_st_error("Incorrect timing of events\n");
151 return EFI_ST_FAILURE;
153 ret = boottime->set_timer(event_notify, EFI_TIMER_STOP, 0);
155 efi_st_error("Could not cancel timer\n");
156 return EFI_ST_FAILURE;
158 /* Raise TPL level */
159 old_tpl = boottime->raise_tpl(TPL_CALLBACK);
160 if (old_tpl != TPL_APPLICATION) {
161 efi_st_error("Initial TPL level was not TPL_APPLICATION");
162 return EFI_ST_FAILURE;
164 /* Set 10 ms timer */
165 notification_count = 0;
166 ret = boottime->set_timer(event_notify, EFI_TIMER_PERIODIC, 100000);
168 efi_st_error("Could not set timer\n");
169 return EFI_ST_FAILURE;
171 /* Set 100 ms timer */
172 ret = boottime->set_timer(event_wait, EFI_TIMER_RELATIVE, 1000000);
173 if (ret != EFI_SUCCESS) {
174 efi_st_error("Could not set timer\n");
175 return EFI_ST_FAILURE;
178 ret = boottime->check_event(event_wait);
179 } while (ret == EFI_NOT_READY);
180 if (ret != EFI_SUCCESS) {
181 efi_st_error("Could not check event\n");
182 return EFI_ST_FAILURE;
184 efi_st_printf("Notification count with TPL level TPL_CALLBACK: %u\n",
186 if (notification_count != 0) {
187 efi_st_error("Suppressed timer fired\n");
188 return EFI_ST_FAILURE;
191 ret = boottime->set_timer(event_wait, EFI_TIMER_RELATIVE, 1000);
192 if (ret != EFI_SUCCESS) {
193 efi_st_error("Could not set timer\n");
194 return EFI_ST_FAILURE;
196 /* Restore the old TPL level */
197 boottime->restore_tpl(TPL_APPLICATION);
198 ret = boottime->wait_for_event(1, &event_wait, &index);
199 if (ret != EFI_SUCCESS) {
200 efi_st_error("Could not wait for event\n");
201 return EFI_ST_FAILURE;
203 efi_st_printf("Notification count with TPL level TPL_APPLICATION: %u\n",
205 if (notification_count < 1) {
206 efi_st_error("Queued timer event did not fire\n");
207 return EFI_ST_FAILURE;
209 ret = boottime->set_timer(event_wait, EFI_TIMER_STOP, 0);
210 if (ret != EFI_SUCCESS) {
211 efi_st_error("Could not cancel timer\n");
212 return EFI_ST_FAILURE;
215 return EFI_ST_SUCCESS;
218 EFI_UNIT_TEST(tpl) = {
219 .name = "task priority levels",
220 .phase = EFI_EXECUTE_BEFORE_BOOTTIME_EXIT,
223 .teardown = teardown,