1 // SPDX-License-Identifier: GPL-2.0
17 		if ((slots) > get_test_bp_slots()) {					\
23 #define TEST_EXPECT_NOSPC(expr) KUNIT_EXPECT_EQ(test, -ENOSPC, PTR_ERR(expr))
31 static struct perf_event *register_test_bp(int cpu, struct task_struct *tsk, int idx)  in register_test_bp()  argument
35 	if (WARN_ON(idx < 0 || idx >= MAX_TEST_BREAKPOINTS))  in register_test_bp()
39 	attr.bp_addr = (unsigned long)&break_vars[idx];  in register_test_bp()
47 	if (WARN_ON(IS_ERR(*bp)))  in unregister_test_bp()
49 	if (WARN_ON(!*bp))  in unregister_test_bp()
59 	if (!slots)  in get_test_bp_slots()
78  * Returns true if this can be called again, continuing at @id.
82 	for (int i = 0; i < get_test_bp_slots() - skip; ++i)  in fill_bp_slots()
97 	if (__other_task)  in get_other_task()
113 		if (num-- <= 0)  in get_test_cpu()
124 	int idx = 0;  in test_one_cpu()  local
126 	fill_bp_slots(test, &idx, get_test_cpu(0), NULL, 0);  in test_one_cpu()
127 	TEST_EXPECT_NOSPC(register_test_bp(-1, current, idx));  in test_one_cpu()
128 	TEST_EXPECT_NOSPC(register_test_bp(get_test_cpu(0), NULL, idx));  in test_one_cpu()
133 	int idx = 0;  in test_many_cpus()  local
138 		bool do_continue = fill_bp_slots(test, &idx, cpu, NULL, 0);  in test_many_cpus()
140 		TEST_EXPECT_NOSPC(register_test_bp(cpu, NULL, idx));  in test_many_cpus()
141 		if (!do_continue)  in test_many_cpus()
148 	int idx = 0;  in test_one_task_on_all_cpus()  local
150 	fill_bp_slots(test, &idx, -1, current, 0);  in test_one_task_on_all_cpus()
151 	TEST_EXPECT_NOSPC(register_test_bp(-1, current, idx));  in test_one_task_on_all_cpus()
152 	TEST_EXPECT_NOSPC(register_test_bp(get_test_cpu(0), current, idx));  in test_one_task_on_all_cpus()
153 	TEST_EXPECT_NOSPC(register_test_bp(get_test_cpu(0), NULL, idx));  in test_one_task_on_all_cpus()
154 	/* Remove one and adding back CPU-target should work. */  in test_one_task_on_all_cpus()
156 	fill_one_bp_slot(test, &idx, get_test_cpu(0), NULL);  in test_one_task_on_all_cpus()
161 	int idx = 0;  in test_two_tasks_on_all_cpus()  local
164 	fill_bp_slots(test, &idx, -1, current, 0);  in test_two_tasks_on_all_cpus()
165 	fill_bp_slots(test, &idx, -1, get_other_task(test), 0);  in test_two_tasks_on_all_cpus()
167 	TEST_EXPECT_NOSPC(register_test_bp(-1, current, idx));  in test_two_tasks_on_all_cpus()
168 	TEST_EXPECT_NOSPC(register_test_bp(-1, get_other_task(test), idx));  in test_two_tasks_on_all_cpus()
169 	TEST_EXPECT_NOSPC(register_test_bp(get_test_cpu(0), current, idx));  in test_two_tasks_on_all_cpus()
170 	TEST_EXPECT_NOSPC(register_test_bp(get_test_cpu(0), get_other_task(test), idx));  in test_two_tasks_on_all_cpus()
171 	TEST_EXPECT_NOSPC(register_test_bp(get_test_cpu(0), NULL, idx));  in test_two_tasks_on_all_cpus()
172 	/* Remove one from first task and adding back CPU-target should not work. */  in test_two_tasks_on_all_cpus()
174 	TEST_EXPECT_NOSPC(register_test_bp(get_test_cpu(0), NULL, idx));  in test_two_tasks_on_all_cpus()
179 	int idx = 0;  in test_one_task_on_one_cpu()  local
181 	fill_bp_slots(test, &idx, get_test_cpu(0), current, 0);  in test_one_task_on_one_cpu()
182 	TEST_EXPECT_NOSPC(register_test_bp(-1, current, idx));  in test_one_task_on_one_cpu()
183 	TEST_EXPECT_NOSPC(register_test_bp(get_test_cpu(0), current, idx));  in test_one_task_on_one_cpu()
184 	TEST_EXPECT_NOSPC(register_test_bp(get_test_cpu(0), NULL, idx));  in test_one_task_on_one_cpu()
186 	 * Remove one and adding back CPU-target should work; this case is  in test_one_task_on_one_cpu()
187 	 * special vs. above because the task's constraints are CPU-dependent.  in test_one_task_on_one_cpu()
190 	fill_one_bp_slot(test, &idx, get_test_cpu(0), NULL);  in test_one_task_on_one_cpu()
195 	int idx = 0;  in test_one_task_mixed()  local
199 	fill_one_bp_slot(test, &idx, get_test_cpu(0), current);  in test_one_task_mixed()
200 	fill_bp_slots(test, &idx, -1, current, 1);  in test_one_task_mixed()
201 	TEST_EXPECT_NOSPC(register_test_bp(-1, current, idx));  in test_one_task_mixed()
202 	TEST_EXPECT_NOSPC(register_test_bp(get_test_cpu(0), current, idx));  in test_one_task_mixed()
203 	TEST_EXPECT_NOSPC(register_test_bp(get_test_cpu(0), NULL, idx));  in test_one_task_mixed()
205 	/* Transition from CPU-dependent pinned count to CPU-independent. */  in test_one_task_mixed()
208 	fill_one_bp_slot(test, &idx, get_test_cpu(0), NULL);  in test_one_task_mixed()
209 	fill_one_bp_slot(test, &idx, get_test_cpu(0), NULL);  in test_one_task_mixed()
210 	TEST_EXPECT_NOSPC(register_test_bp(get_test_cpu(0), NULL, idx));  in test_one_task_mixed()
215 	int idx = 0;  in test_two_tasks_on_one_cpu()  local
217 	fill_bp_slots(test, &idx, get_test_cpu(0), current, 0);  in test_two_tasks_on_one_cpu()
218 	fill_bp_slots(test, &idx, get_test_cpu(0), get_other_task(test), 0);  in test_two_tasks_on_one_cpu()
220 	TEST_EXPECT_NOSPC(register_test_bp(-1, current, idx));  in test_two_tasks_on_one_cpu()
221 	TEST_EXPECT_NOSPC(register_test_bp(-1, get_other_task(test), idx));  in test_two_tasks_on_one_cpu()
222 	TEST_EXPECT_NOSPC(register_test_bp(get_test_cpu(0), current, idx));  in test_two_tasks_on_one_cpu()
223 	TEST_EXPECT_NOSPC(register_test_bp(get_test_cpu(0), get_other_task(test), idx));  in test_two_tasks_on_one_cpu()
224 	TEST_EXPECT_NOSPC(register_test_bp(get_test_cpu(0), NULL, idx));  in test_two_tasks_on_one_cpu()
226 	fill_bp_slots(test, &idx, get_test_cpu(1), NULL, 0);  in test_two_tasks_on_one_cpu()
231 	int idx = 0;  in test_two_tasks_on_one_all_cpus()  local
233 	fill_bp_slots(test, &idx, get_test_cpu(0), current, 0);  in test_two_tasks_on_one_all_cpus()
234 	fill_bp_slots(test, &idx, -1, get_other_task(test), 0);  in test_two_tasks_on_one_all_cpus()
236 	TEST_EXPECT_NOSPC(register_test_bp(-1, current, idx));  in test_two_tasks_on_one_all_cpus()
237 	TEST_EXPECT_NOSPC(register_test_bp(-1, get_other_task(test), idx));  in test_two_tasks_on_one_all_cpus()
238 	TEST_EXPECT_NOSPC(register_test_bp(get_test_cpu(0), current, idx));  in test_two_tasks_on_one_all_cpus()
239 	TEST_EXPECT_NOSPC(register_test_bp(get_test_cpu(0), get_other_task(test), idx));  in test_two_tasks_on_one_all_cpus()
240 	TEST_EXPECT_NOSPC(register_test_bp(get_test_cpu(0), NULL, idx));  in test_two_tasks_on_one_all_cpus()
242 	TEST_EXPECT_NOSPC(register_test_bp(get_test_cpu(1), NULL, idx));  in test_two_tasks_on_one_all_cpus()
248 	int idx = 0;  in test_task_on_all_and_one_cpu()  local
252 	fill_bp_slots(test, &idx, -1, current, 2);  in test_task_on_all_and_one_cpu()
254 	tsk_on_cpu_idx = idx;  in test_task_on_all_and_one_cpu()
255 	fill_one_bp_slot(test, &idx, get_test_cpu(0), current);  in test_task_on_all_and_one_cpu()
256 	fill_one_bp_slot(test, &idx, -1, current);  in test_task_on_all_and_one_cpu()
258 	TEST_EXPECT_NOSPC(register_test_bp(-1, current, idx));  in test_task_on_all_and_one_cpu()
259 	TEST_EXPECT_NOSPC(register_test_bp(get_test_cpu(0), current, idx));  in test_task_on_all_and_one_cpu()
260 	TEST_EXPECT_NOSPC(register_test_bp(get_test_cpu(0), NULL, idx));  in test_task_on_all_and_one_cpu()
263 	cpu_idx = idx;  in test_task_on_all_and_one_cpu()
264 	fill_one_bp_slot(test, &idx, get_test_cpu(1), NULL);  in test_task_on_all_and_one_cpu()
265 	TEST_EXPECT_NOSPC(register_test_bp(get_test_cpu(1), NULL, idx));  in test_task_on_all_and_one_cpu()
270 	TEST_EXPECT_NOSPC(register_test_bp(-1, current, idx));  in test_task_on_all_and_one_cpu()
273 	fill_one_bp_slot(test, &idx, -1, current);  in test_task_on_all_and_one_cpu()
275 	TEST_EXPECT_NOSPC(register_test_bp(-1, current, idx));  in test_task_on_all_and_one_cpu()
276 	TEST_EXPECT_NOSPC(register_test_bp(get_test_cpu(0), current, idx));  in test_task_on_all_and_one_cpu()
277 	TEST_EXPECT_NOSPC(register_test_bp(get_test_cpu(0), NULL, idx));  in test_task_on_all_and_one_cpu()
278 	TEST_EXPECT_NOSPC(register_test_bp(get_test_cpu(1), NULL, idx));  in test_task_on_all_and_one_cpu()
297 	if (num_online_cpus() < 2)  in test_init()
301 	if (hw_breakpoint_is_used())  in test_init()
310 		if (test_bps[i])  in test_exit()
314 	if (__other_task) {  in test_exit()