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/* Event-Based Branch Facility Tests.
*
* Copyright IBM Corp. 2013
*
* The MIT License (MIT)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#define _GNU_SOURCE /* For CPU_ZERO etc. */
#include <stdio.h>
#include <errno.h>
#include <paf/ebb.h>
#include <sys/wait.h>
#include <unistd.h>
#include <stdlib.h>
#include <sched.h>
#include "test_ebb_common.h"
#define PM_CONFIG 0x1001e
static volatile int ebb_handler_triggered = 0;
#define TEST_LOOP_COUNT 2
static void attribute_noinline
ebb_handler_test (void *context)
{
int *trigger = (int *) (context);
printf ("%s: ebb_handler_triggered address = %p\n", __FUNCTION__, trigger);
*trigger += 1;
}
int bind_to_cpu(int cpu)
{
cpu_set_t mask;
CPU_ZERO(&mask);
CPU_SET(cpu, &mask);
return sched_setaffinity(0, sizeof(mask), &mask);
}
/*
* Test that closing the EBB event clears MMCR0_PMCC, preventing further access
* by userspace to the PMU hardware.
*/
int
test_ebb_cpu (void)
{
int ebbfd;
ebbhandler_t handler;
const int cpu_to_bind = 0;
bind_to_cpu (cpu_to_bind);
ebbfd = paf_ebb_pmu_init_ex (PM_CONFIG, -1, 0, cpu_to_bind, 0);
if (ebbfd == -1)
{
printf ("Error: paf_ebb_pmu_init_ex () failed " "(errno = %i)\n", errno);
return -1;
}
ebb_handler_triggered = 0;
handler = paf_ebb_register_handler (ebb_handler_test,
(void *) &ebb_handler_triggered,
PAF_EBB_CALLBACK_GPR_SAVE,
PAF_EBB_FLAGS_RESET_PMU);
if (handler != ebb_handler_test)
{
printf ("Error: paf_ebb_register_handler \
(ebb_handler_test) != handler\n");
return -1;
}
paf_ebb_enable_branches ();
paf_ebb_pmu_reset ();
while (ebb_handler_triggered != TEST_LOOP_COUNT)
{
if (ebb_check_mmcr0 ())
return 1;
}
paf_ebb_disable_branches ();
paf_ebb_event_close (ebbfd);
return 0;
}
#define EBB_TEST test_ebb_cpu
#include "test_ebb-skeleton.c"
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