// SPDX-License-Identifier: GPL-2.0-only /* * Copyright 2014, Michael Ellerman, IBM Corp. */ #include <stdio.h> #include <stdlib.h> #include <setjmp.h> #include <signal.h> #include "ebb.h" /* Test that things work sanely if we have no handler */ static int no_handler_test(void) { struct event event; u64 val; int i; SKIP_IF(!ebb_is_supported()); event_init_named(&event, 0x1001e, "cycles"); event_leader_ebb_init(&event); event.attr.exclude_kernel = 1; event.attr.exclude_hv = 1; event.attr.exclude_idle = 1; FAIL_IF(event_open(&event)); FAIL_IF(ebb_event_enable(&event)); val = mfspr(SPRN_EBBHR); FAIL_IF(val != 0); /* Make sure it overflows quickly */ sample_period = 1000; mtspr(SPRN_PMC1, pmc_sample_period(sample_period)); /* Spin to make sure the event has time to overflow */ for (i = 0; i < 1000; i++) mb(); dump_ebb_state(); /* We expect to see the PMU frozen & PMAO set */ val = mfspr(SPRN_MMCR0); FAIL_IF(val != 0x0000000080000080); event_close(&event); dump_ebb_state(); /* The real test is that we never took an EBB at 0x0 */ return 0; } int main(void) { return test_harness(no_handler_test,"no_handler_test"); }