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Fri, 10 Jun 2022 13:42:59 +0000 (GMT) From: Athira Rajeev To: mpe@ellerman.id.au Subject: [PATCH V3 33/35] selftest/powerpc/pmu: Add selftest for group constraint check for MMCRA thresh_ctl field Date: Fri, 10 Jun 2022 19:11:11 +0530 Message-Id: <20220610134113.62991-34-atrajeev@linux.vnet.ibm.com> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220610134113.62991-1-atrajeev@linux.vnet.ibm.com> References: <20220610134113.62991-1-atrajeev@linux.vnet.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: PfPCpcnNvd0poIEIEei_4sTFhLYYln_9 X-Proofpoint-ORIG-GUID: PfPCpcnNvd0poIEIEei_4sTFhLYYln_9 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.874,Hydra:6.0.517,FMLib:17.11.64.514 definitions=2022-06-10_06,2022-06-09_02,2022-02-23_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 malwarescore=0 clxscore=1015 lowpriorityscore=0 phishscore=0 adultscore=0 mlxlogscore=999 impostorscore=0 mlxscore=0 spamscore=0 suspectscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2204290000 definitions=main-2206100056 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kjain@linux.ibm.com, maddy@linux.ibm.com, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" From: Kajol Jain Thresh control bits in the event code is used to program thresh_ctl field in Monitor Mode Control Register A (MMCRA: 48-55). When scheduling events as a group, all events in that group should match value in these bits. Otherwise event open for the sibling events will fail. Testcase uses event code PM_MRK_INST_CMPL (0x401e0) as leader and another event PM_THRESH_MET (101ec) as sibling event, and checks if group constraint checks for thresh_ctl field added correctly via perf interface. Signed-off-by: Kajol Jain --- .../powerpc/pmu/event_code_tests/Makefile | 2 +- .../group_constraint_thresh_ctl_test.c | 64 +++++++++++++++++++ 2 files changed, 65 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_thresh_ctl_test.c diff --git a/tools/testing/selftests/powerpc/pmu/event_code_tests/Makefile b/tools/testing/selftests/powerpc/pmu/event_code_tests/Makefile index f72c73b5b79a..16cbb2e52865 100644 --- a/tools/testing/selftests/powerpc/pmu/event_code_tests/Makefile +++ b/tools/testing/selftests/powerpc/pmu/event_code_tests/Makefile @@ -6,7 +6,7 @@ TEST_GEN_PROGS := group_constraint_pmc56_test group_pmc56_exclude_constraints_te group_constraint_mmcra_sample_test invalid_event_code_test reserved_bits_mmcra_thresh_ctl_test \ blacklisted_events_test event_alternatives_tests_p9 event_alternatives_tests_p10 generic_events_valid_test \ group_constraint_l2l3_sel_test group_constraint_cache_test group_constraint_thresh_cmp_test \ - group_constraint_unit_test + group_constraint_unit_test group_constraint_thresh_ctl_test top_srcdir = ../../../../../.. include ../../../lib.mk diff --git a/tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_thresh_ctl_test.c b/tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_thresh_ctl_test.c new file mode 100644 index 000000000000..e0852ebc1671 --- /dev/null +++ b/tools/testing/selftests/powerpc/pmu/event_code_tests/group_constraint_thresh_ctl_test.c @@ -0,0 +1,64 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright 2022, Kajol Jain, IBM Corp. + */ + +#include +#include + +#include "../event.h" +#include "utils.h" +#include "../sampling_tests/misc.h" + +/* + * Primary PMU events used here are PM_MRK_INST_CMPL (0x401e0) and + * PM_THRESH_MET (0x101ec). + * Threshold event selection used is issue to complete and issue to + * finished for cycles + * Sampling criteria is Load or Store only sampling + */ +#define EventCode_1 0x35340401e0 +#define EventCode_2 0x34340101ec +#define EventCode_3 0x35340101ec + +/* + * Testcase for group constraint check of thresh_ctl bits which is + * used to program thresh compare field in Monitor Mode Control Register A + * (MMCR0: 48-55). + * All events in the group should match thresh ctl bits otherwise + * event_open for the group will fail. + */ +static int group_constraint_thresh_ctl(void) +{ + struct event event, leader; + + /* Check for platform support for the test */ + SKIP_IF(platform_check_for_tests()); + + /* Init the events for the group contraint thresh control test */ + event_init(&leader, EventCode_1); + FAIL_IF(event_open(&leader)); + + event_init(&event, EventCode_2); + + /* Expected to fail as sibling and leader event request different thresh_ctl bits */ + FAIL_IF(!event_open_with_group(&event, leader.fd)); + + event_close(&event); + + /* Init the event for the group contraint thresh control test */ + event_init(&event, EventCode_3); + + /* Expected to succeed as sibling and leader event request same thresh_ctl bits */ + 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_thresh_ctl, "group_constraint_thresh_ctl"); +}