1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright 2014, Michael Ellerman, IBM Corp.
4  */
5 
6 #include <stdio.h>
7 #include <stdlib.h>
8 
9 #include "ebb.h"
10 
11 
12 /*
13  * Basic test that counts user cycles and takes EBBs.
14  */
15 int cycles(void)
16 {
17 	struct event event;
18 
19 	SKIP_IF(!ebb_is_supported());
20 
21 	event_init_named(&event, 0x1001e, "cycles");
22 	event_leader_ebb_init(&event);
23 
24 	event.attr.exclude_kernel = 1;
25 	event.attr.exclude_hv = 1;
26 	event.attr.exclude_idle = 1;
27 
28 	FAIL_IF(event_open(&event));
29 
30 	ebb_enable_pmc_counting(1);
31 	setup_ebb_handler(standard_ebb_callee);
32 	ebb_global_enable();
33 	FAIL_IF(ebb_event_enable(&event));
34 
35 	mtspr(SPRN_PMC1, pmc_sample_period(sample_period));
36 
37 	while (ebb_state.stats.ebb_count < 10) {
38 		FAIL_IF(core_busy_loop());
39 		FAIL_IF(ebb_check_mmcr0());
40 	}
41 
42 	ebb_global_disable();
43 	ebb_freeze_pmcs();
44 
45 	count_pmc(1, sample_period);
46 
47 	dump_ebb_state();
48 
49 	event_close(&event);
50 
51 	FAIL_IF(ebb_state.stats.ebb_count == 0);
52 	FAIL_IF(!ebb_check_count(1, sample_period, 100));
53 
54 	return 0;
55 }
56 
57 int main(void)
58 {
59 	return test_harness(cycles, "cycles");
60 }
61