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
|
/*
* efi_selftest_events
*
* Copyright (c) 2017 Heinrich Schuchardt <xypron.glpk@gmx.de>
*
* SPDX-License-Identifier: GPL-2.0+
*
* This unit test uses timer events to check the handling of
* task priority levels.
*/
#include <efi_selftest.h>
static struct efi_event *event_notify;
static struct efi_event *event_wait;
static unsigned int notification_count;
static struct efi_boot_services *boottime;
/*
* Notification function, increments the notification count.
*
* @event notified event
* @context pointer to the notification count
*/
static void EFIAPI notify(struct efi_event *event, void *context)
{
unsigned int *count = context;
if (count)
++*count;
}
/*
* Setup unit test.
*
* Create two timer events.
* One with EVT_NOTIFY_SIGNAL, the other with EVT_NOTIFY_WAIT.
*
* @handle: handle of the loaded image
* @systable: system table
* @return: EFI_ST_SUCCESS for success
*/
static int setup(const efi_handle_t handle,
const struct efi_system_table *systable)
{
efi_status_t ret;
boottime = systable->boottime;
ret = boottime->create_event(EVT_TIMER | EVT_NOTIFY_SIGNAL,
TPL_CALLBACK, notify,
(void *)¬ification_count,
&event_notify);
if (ret != EFI_SUCCESS) {
efi_st_error("could not create event\n");
return EFI_ST_FAILURE;
}
ret = boottime->create_event(EVT_TIMER | EVT_NOTIFY_WAIT,
TPL_HIGH_LEVEL, notify, NULL, &event_wait);
if (ret != EFI_SUCCESS) {
efi_st_error("could not create event\n");
return EFI_ST_FAILURE;
}
return EFI_ST_SUCCESS;
}
/*
* Tear down unit test.
*
* Close the events created in setup.
*
* @return: EFI_ST_SUCCESS for success
*/
static int teardown(void)
{
efi_status_t ret;
if (event_notify) {
ret = boottime->close_event(event_notify);
event_notify = NULL;
if (ret != EFI_SUCCESS) {
efi_st_error("could not close event\n");
return EFI_ST_FAILURE;
}
}
if (event_wait) {
ret = boottime->close_event(event_wait);
event_wait = NULL;
if (ret != EFI_SUCCESS) {
efi_st_error("could not close event\n");
return EFI_ST_FAILURE;
}
}
boottime->restore_tpl(TPL_APPLICATION);
return EFI_ST_SUCCESS;
}
/*
* Execute unit test.
*
* Run a 10 ms periodic timer and check that it is called 10 times
* while waiting for 100 ms single shot timer.
*
* Raise the TPL level to the level of the 10 ms timer and observe
* that the notification function is not called again.
*
* Lower the TPL level and check that the queued notification
* function is called.
*
* @return: EFI_ST_SUCCESS for success
*/
static int execute(void)
{
size_t index;
efi_status_t ret;
UINTN old_tpl;
/* Set 10 ms timer */
notification_count = 0;
ret = boottime->set_timer(event_notify, EFI_TIMER_PERIODIC, 100000);
if (ret != EFI_SUCCESS) {
efi_st_error("Could not set timer\n");
return EFI_ST_FAILURE;
}
/* Set 100 ms timer */
ret = boottime->set_timer(event_wait, EFI_TIMER_RELATIVE, 1000000);
if (ret != EFI_SUCCESS) {
efi_st_error("Could not set timer\n");
return EFI_ST_FAILURE;
}
index = 5;
ret = boottime->wait_for_event(1, &event_wait, &index);
if (ret != EFI_SUCCESS) {
efi_st_error("Could not wait for event\n");
return EFI_ST_FAILURE;
}
ret = boottime->check_event(event_wait);
if (ret != EFI_NOT_READY) {
efi_st_error("Signaled state was not cleared.\n");
efi_st_printf("ret = %u\n", (unsigned int)ret);
return EFI_ST_FAILURE;
}
if (index != 0) {
efi_st_error("WaitForEvent returned wrong index\n");
return EFI_ST_FAILURE;
}
efi_st_printf("Notification count with TPL level TPL_APPLICATION: %u\n",
notification_count);
if (notification_count < 8 || notification_count > 12) {
efi_st_error("Incorrect timing of events\n");
return EFI_ST_FAILURE;
}
ret = boottime->set_timer(event_notify, EFI_TIMER_STOP, 0);
if (index != 0) {
efi_st_error("Could not cancel timer\n");
return EFI_ST_FAILURE;
}
/* Raise TPL level */
old_tpl = boottime->raise_tpl(TPL_CALLBACK);
if (old_tpl != TPL_APPLICATION) {
efi_st_error("Initial TPL level was not TPL_APPLICATION");
return EFI_ST_FAILURE;
}
/* Set 10 ms timer */
notification_count = 0;
ret = boottime->set_timer(event_notify, EFI_TIMER_PERIODIC, 100000);
if (index != 0) {
efi_st_error("Could not set timer\n");
return EFI_ST_FAILURE;
}
/* Set 100 ms timer */
ret = boottime->set_timer(event_wait, EFI_TIMER_RELATIVE, 1000000);
if (ret != EFI_SUCCESS) {
efi_st_error("Could not set timer\n");
return EFI_ST_FAILURE;
}
do {
ret = boottime->check_event(event_wait);
} while (ret == EFI_NOT_READY);
if (ret != EFI_SUCCESS) {
efi_st_error("Could not check event\n");
return EFI_ST_FAILURE;
}
efi_st_printf("Notification count with TPL level TPL_CALLBACK: %u\n",
notification_count);
if (notification_count != 0) {
efi_st_error("Suppressed timer fired\n");
return EFI_ST_FAILURE;
}
/* Set 1 ms timer */
ret = boottime->set_timer(event_wait, EFI_TIMER_RELATIVE, 1000);
if (ret != EFI_SUCCESS) {
efi_st_error("Could not set timer\n");
return EFI_ST_FAILURE;
}
/* Restore the old TPL level */
boottime->restore_tpl(TPL_APPLICATION);
ret = boottime->wait_for_event(1, &event_wait, &index);
if (ret != EFI_SUCCESS) {
efi_st_error("Could not wait for event\n");
return EFI_ST_FAILURE;
}
efi_st_printf("Notification count with TPL level TPL_APPLICATION: %u\n",
notification_count);
if (notification_count < 1) {
efi_st_error("Queued timer event did not fire\n");
return EFI_ST_FAILURE;
}
ret = boottime->set_timer(event_wait, EFI_TIMER_STOP, 0);
if (ret != EFI_SUCCESS) {
efi_st_error("Could not cancel timer\n");
return EFI_ST_FAILURE;
}
return EFI_ST_SUCCESS;
}
EFI_UNIT_TEST(tpl) = {
.name = "task priority levels",
.phase = EFI_EXECUTE_BEFORE_BOOTTIME_EXIT,
.setup = setup,
.execute = execute,
.teardown = teardown,
};
|
