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Fri, 6 May 2022 08:46:02 +0000 (GMT) Received: from li-e8dccbcc-2adc-11b2-a85c-bc1f33b9b810.ibm.com.com (unknown [9.43.19.224]) by d06av22.portsmouth.uk.ibm.com (Postfix) with ESMTP; Fri, 6 May 2022 08:46:02 +0000 (GMT) From: Kajol Jain To: mpe@ellerman.id.au, linuxppc-dev@lists.ozlabs.org Subject: [PATCH 04/35] selftest/powerpc/pmu: Add support for branch sampling in get_intr_regs function Date: Fri, 6 May 2022 14:15:13 +0530 Message-Id: <20220506084544.56527-5-kjain@linux.ibm.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20220506084544.56527-1-kjain@linux.ibm.com> References: <20220506084544.56527-1-kjain@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: kFTrDxYF81xaryL9tLzyQCIDbZbJxQuE X-Proofpoint-GUID: kFTrDxYF81xaryL9tLzyQCIDbZbJxQuE X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.858,Hydra:6.0.486,FMLib:17.11.64.514 definitions=2022-05-06_02,2022-05-05_01,2022-02-23_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 mlxscore=0 spamscore=0 impostorscore=0 lowpriorityscore=0 suspectscore=0 adultscore=0 mlxlogscore=999 malwarescore=0 clxscore=1015 phishscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2202240000 definitions=main-2205060043 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, atrajeev@linux.vnet.ibm.com, maddy@linux.ibm.com, disgoel@linux.vnet.ibm.com, rnsastry@linux.ibm.com Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Add support for sample type as PERF_SAMPLE_BRANCH_STACK in sampling tests. This change is a precursor/helper for sampling testcases, that test branck stack feature in perf interface. Signed-off-by: Kajol Jain --- .../powerpc/pmu/sampling_tests/misc.c | 21 ++++++++++++++++++- 1 file changed, 20 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/powerpc/pmu/sampling_tests/misc.c b/tools/testing/selftests/powerpc/pmu/sampling_tests/misc.c index eff56aa9f511..2562d8439d7d 100644 --- a/tools/testing/selftests/powerpc/pmu/sampling_tests/misc.c +++ b/tools/testing/selftests/powerpc/pmu/sampling_tests/misc.c @@ -259,13 +259,32 @@ u64 *get_intr_regs(struct event *event, void *sample_buff) u64 *intr_regs; size_t size = 0; - if ((type ^ PERF_SAMPLE_REGS_INTR)) + if ((type ^ (PERF_SAMPLE_REGS_INTR | PERF_SAMPLE_BRANCH_STACK)) && + (type ^ PERF_SAMPLE_REGS_INTR)) return NULL; intr_regs = (u64 *)perf_read_first_sample(sample_buff, &size); if (!intr_regs) return NULL; + if (type & PERF_SAMPLE_BRANCH_STACK) { + /* + * PERF_RECORD_SAMPLE and PERF_SAMPLE_BRANCH_STACK: + * struct { + * struct perf_event_header hdr; + * u64 number_of_branches; + * struct perf_branch_entry[number_of_branches]; + * u64 data[]; + * }; + * struct perf_branch_entry { + * u64 from; + * u64 to; + * u64 misc; + * }; + */ + intr_regs += ((*intr_regs) * 3) + 1; + } + /* * First entry in the sample buffer used to specify * PERF_SAMPLE_REGS_ABI_64, skip perf regs abi to access -- 2.31.1