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selftests/powerpc/pmu: Add selftest for reserved bit check for MMCRA thresh_ctl field

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Testcase for reserved bits in Monitor Mode Control Register A (MMCRA)
thresh_ctl bits. For MMCRA[48:51]/[52:55]) Threshold Start/Stop,
0b11110000/0b00001111 is reserved.

Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220610134113.62991-25-atrajeev@linux.vnet.ibm.com
This commit is contained in:
Athira Rajeev 2022-06-10 19:11:02 +05:30 committed by Michael Ellerman
parent 5196a27978
commit 0c90263339
2 changed files with 45 additions and 1 deletions
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2
tools/testing/selftests/powerpc/pmu/event_code_tests/Makefile
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@ -3,7 +3,7 @@ CFLAGS += -m64
TEST_GEN_PROGS := group_constraint_pmc56_test group_pmc56_exclude_constraints_test group_constraint_pmc_count_test \
group_constraint_repeat_test group_constraint_radix_scope_qual_test reserved_bits_mmcra_sample_elig_mode_test \
group_constraint_mmcra_sample_test invalid_event_code_test
group_constraint_mmcra_sample_test invalid_event_code_test reserved_bits_mmcra_thresh_ctl_test
top_srcdir = ../../../../../..
include ../../../lib.mk

44
tools/testing/selftests/powerpc/pmu/event_code_tests/reserved_bits_mmcra_thresh_ctl_test.c Normal file
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@ -0,0 +1,44 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright 2022, Athira Rajeev, IBM Corp.
*/
#include <stdio.h>
#include "../event.h"
#include "../sampling_tests/misc.h"
/*
* Testcase for reserved bits in Monitor Mode
* Control Register A (MMCRA) thresh_ctl bits.
* For MMCRA[48:51]/[52:55]) Threshold Start/Stop,
* 0b11110000/0b00001111 is reserved.
*/
static int reserved_bits_mmcra_thresh_ctl(void)
{
struct event event;
/* Check for platform support for the test */
SKIP_IF(platform_check_for_tests());
/* Skip for Generic compat PMU */
SKIP_IF(check_for_generic_compat_pmu());
/*
* MMCRA[48:51]/[52:55]) Threshold Start/Stop
* events Selection. 0b11110000/0b00001111 is reserved.
* Expected to fail when using these reserved values.
*/
event_init(&event, 0xf0340401e0);
FAIL_IF(!event_open(&event));
event_init(&event, 0x0f340401e0);
FAIL_IF(!event_open(&event));
return 0;
}
int main(void)
{
return test_harness(reserved_bits_mmcra_thresh_ctl, "reserved_bits_mmcra_thresh_ctl");
}