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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-297ddde1e7esm66639765ad.77.2025.11.09.18.42.15 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 09 Nov 2025 18:42:22 -0800 (PST) Message-ID: <30cc9d63-72a2-4dbd-89c5-d3a84e5a36de@oss.qualcomm.com> Date: Mon, 10 Nov 2025 10:42:13 +0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v7 0/9] coresight: ctcu: Enable byte-cntr function for TMC ETR To: Suzuki K Poulose , Mike Leach , James Clark , Alexander Shishkin , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Tingwei Zhang , Yuanfang Zhang , Mao Jinlong , Jie Gan , Bjorn Andersson , Konrad Dybcio Cc: coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, Krzysztof Kozlowski , Konrad Dybcio References: <20251013-enable-byte-cntr-for-ctcu-v7-0-e1e8f41e15dd@oss.qualcomm.com> Content-Language: en-US From: Jie Gan In-Reply-To: <20251013-enable-byte-cntr-for-ctcu-v7-0-e1e8f41e15dd@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Authority-Analysis: v=2.4 cv=dMWrWeZb c=1 sm=1 tr=0 ts=69115110 cx=c_pps a=cmESyDAEBpBGqyK7t0alAg==:117 a=nuhDOHQX5FNHPW3J6Bj6AA==:17 a=IkcTkHD0fZMA:10 a=6UeiqGixMTsA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=DxhRIveLkXWR0EuVxScA:9 a=QEXdDO2ut3YA:10 a=1OuFwYUASf3TG4hYMiVC:22 X-Proofpoint-GUID: 6SZbWs59PT0RPmrAdl7ISn8EKm8hSt3Q X-Proofpoint-ORIG-GUID: 6SZbWs59PT0RPmrAdl7ISn8EKm8hSt3Q X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMTEwMDAyMCBTYWx0ZWRfX9I3OVTEOT7fD rT0QnhVSPuNqpxxBFlZb4AfjfueEXR2aPaq+390uPvxzW3q+vGWkLj6SbWeApXnfJcmDBIIFMV9 xFranKTyUHVfcxK6GwNYd2s00YQBRJJT7kwbVsLhKUt4XR4nUTvOyd51xxGpHm0wCs6DfwWAprS u/OSvcylIIyeSUcSiYT4wrqWUxSZotVLUuNirEi+yCpuf7lo3MArEcxCe8Ufik0h5E1BguGTyk3 afHY5IaBKmOMkfyvgOemy1ICUmhdiraXXZZd0Wic5vgIENnQi9WdczlFPA2h48s15IIXO1RUWa3 GxNKSqQdseaU/rXNBzXu6zChp3qA9htEPseMJmID5yHNwSrAberwkBzIqfJzqPx+e2Ggk81g7BA wsXbPA6h6AaMpILRzc/2e291kFwIeQ== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-11-10_01,2025-11-06_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 clxscore=1015 impostorscore=0 malwarescore=0 adultscore=0 suspectscore=0 priorityscore=1501 bulkscore=0 phishscore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2510240001 definitions=main-2511100020 On 10/13/2025 1:49 PM, Jie Gan wrote: > The byte-cntr function provided by the CTCU device is used to count the > trace data entering the ETR. An interrupt is triggered if the data size > exceeds the threshold set in the BYTECNTRVAL register. The interrupt > handler counts the number of triggered interruptions. > <...> > Enable both ETR0 and ETR1: > echo 0x10000 0x10000 > /sys/bus/coresight/devices/ctcu0/irq_threshold > > Reset the BYTECNTR register for etr0: > echo 0 > /sys/bus/coresight/devices/ctcu0/irq_threshold > Gentle reminder. > Changes in V7: > 1. rebased on tag next-20251010 > 2. updated info for sysfs node document > Link to V6 - https://lore.kernel.org/all/20250908-enable-byte-cntr-for-tmc-v6-0-1db9e621441a@oss.qualcomm.com/ > <...>