2 * Copyright 2014, Michael Ellerman, IBM Corp.
3 * Licensed under GPLv2.
14 /* Test that things work sanely if we have no handler */
16 static int no_handler_test(void)
22 SKIP_IF(!ebb_is_supported());
24 event_init_named(&event, 0x1001e, "cycles");
25 event_leader_ebb_init(&event);
27 event.attr.exclude_kernel = 1;
28 event.attr.exclude_hv = 1;
29 event.attr.exclude_idle = 1;
31 FAIL_IF(event_open(&event));
32 FAIL_IF(ebb_event_enable(&event));
34 val = mfspr(SPRN_EBBHR);
37 /* Make sure it overflows quickly */
39 mtspr(SPRN_PMC1, pmc_sample_period(sample_period));
41 /* Spin to make sure the event has time to overflow */
42 for (i = 0; i < 1000; i++)
47 /* We expect to see the PMU frozen & PMAO set */
48 val = mfspr(SPRN_MMCR0);
49 FAIL_IF(val != 0x0000000080000080);
53 /* The real test is that we never took an EBB at 0x0 */
60 return test_harness(no_handler_test,"no_handler_test");