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