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selftests/powerpc/pmu: Add selftest for group constraint check for radix_scope_qual field

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Testcase for group constraint check for radix_scope_qual field which is
used to program Monitor Mode Control Register (MMCR1) bit 18. All events
in the group should match radix_scope_qual bit, otherwise event_open for
the group should fail. Testcase uses "0x14242" (PM_DATA_RADIX_PROCESS_L2_PTE_FROM_L2)
with radix_scope_qual bit set for power10.

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/20220610134113.62991-21-atrajeev@linux.vnet.ibm.com
This commit is contained in:
Athira Rajeev
2022-06-10 19:10:58 +05:30
committed by Michael Ellerman
parent 38b6da4530
commit dc431be3b5
2 changed files with 57 additions and 1 deletions
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tools/testing/selftests/powerpc/pmu/event_code_tests/Makefile
+1 -1
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@@ -2,7 +2,7 @@
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_repeat_test group_constraint_radix_scope_qual_test
top_srcdir = ../../../../../..
include ../../../lib.mk
tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_radix_scope_qual_test.c
+56
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@@ -0,0 +1,56 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright 2022, Athira Rajeev, IBM Corp.
*/
#include <stdio.h>
#include "../event.h"
#include "../sampling_tests/misc.h"
/* PM_DATA_RADIX_PROCESS_L2_PTE_FROM_L2 */
#define EventCode_1 0x14242
/* PM_DATA_RADIX_PROCESS_L2_PTE_FROM_L3 */
#define EventCode_2 0x24242
/*
* Testcase for group constraint check for radix_scope_qual
* field which is used to program Monitor Mode Control
* egister (MMCR1) bit 18.
* All events in the group should match radix_scope_qual,
* bits otherwise event_open for the group should fail.
*/
static int group_constraint_radix_scope_qual(void)
{
struct event event, leader;
/*
* Check for platform support for the test.
* This test is aplicable on power10 only.
*/
SKIP_IF(platform_check_for_tests());
SKIP_IF(!have_hwcap2(PPC_FEATURE2_ARCH_3_1));
/* Init the events for the group contraint check for radix_scope_qual bits */
event_init(&leader, EventCode_1);
FAIL_IF(event_open(&leader));
event_init(&event, 0x200fc);
/* Expected to fail as sibling event doesn't request same radix_scope_qual bits as leader */
FAIL_IF(!event_open_with_group(&event, leader.fd));
event_init(&event, EventCode_2);
/* Expected to pass as sibling event request same radix_scope_qual bits as leader */
FAIL_IF(event_open_with_group(&event, leader.fd));
event_close(&leader);
event_close(&event);
return 0;
}
int main(void)
{
return test_harness(group_constraint_radix_scope_qual,
"group_constraint_radix_scope_qual");
}