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selftests/powerpc/pmu: Add selftest for group constraint check for PMC5 and PMC6

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Events using Performance Monitor Counter 5 (PMC5) and Performance
Monitor Counter 6 (PMC6) can't have other fields in event code like
cache bits, thresholding or marked bit. PMC5 and PMC6 only supports base
events: ie 500fa and 600f4. Other combinations should fail. Testcase
tries setting other bits in event code for 500fa and 600f4 to check this
scenario.

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/20220610134113.62991-17-atrajeev@linux.vnet.ibm.com
This commit is contained in:
Athira Rajeev 2022-06-10 19:10:54 +05:30 committed by Michael Ellerman
parent 0a110a4b69
commit 9258c0aa75
2 changed files with 64 additions and 1 deletions
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2
tools/testing/selftests/powerpc/pmu/event_code_tests/Makefile
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@ -1,7 +1,7 @@
# SPDX-License-Identifier: GPL-2.0
CFLAGS += -m64
TEST_GEN_PROGS :=
TEST_GEN_PROGS := group_constraint_pmc56_test
top_srcdir = ../../../../../..
include ../../../lib.mk

63
tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_pmc56_test.c Normal file
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@ -0,0 +1,63 @@
// 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 checking constraint checks for
* Performance Monitor Counter 5 (PMC5) and also
* Performance Monitor Counter 6 (PMC6). Events using
* PMC5/PMC6 shouldn't have other fields in event
* code like cache bits, thresholding or marked bit.
*/
static int group_constraint_pmc56(void)
{
struct event event;
/* Check for platform support for the test */
SKIP_IF(platform_check_for_tests());
/*
* Events using PMC5 and PMC6 with cache bit
* set in event code is expected to fail.
*/
event_init(&event, 0x2500fa);
FAIL_IF(!event_open(&event));
event_init(&event, 0x2600f4);
FAIL_IF(!event_open(&event));
/*
* PMC5 and PMC6 only supports base events:
* ie 500fa and 600f4. Other combinations
* should fail.
*/
event_init(&event, 0x501e0);
FAIL_IF(!event_open(&event));
event_init(&event, 0x6001e);
FAIL_IF(!event_open(&event));
event_init(&event, 0x501fa);
FAIL_IF(!event_open(&event));
/*
* Events using PMC5 and PMC6 with random
* sampling bits set in event code should fail
* to schedule.
*/
event_init(&event, 0x35340500fa);
FAIL_IF(!event_open(&event));
return 0;
}
int main(void)
{
return test_harness(group_constraint_pmc56, "group_constraint_pmc56");
}