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([2a05:6e02:1041:c10:5e04:77e4:65ed:d6d7]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-485883be709sm28042627f8f.21.2026.09.07.03.03.04 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 07 Sep 2026 03:03:04 -0700 (PDT) Message-ID: Date: Mon, 7 Sep 2026 12:03:04 +0200 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 0/2] powercap: Introduce generic hierarchy helpers and selftests From: Daniel Lezcano To: rafael@kernel.org Cc: linux-pm@vger.kernel.org, shuah@kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, manaf.pallikunhi@oss.qualcomm.com References: <20260806110159.69690-1-daniel.lezcano@oss.qualcomm.com> Content-Language: en-US In-Reply-To: <20260806110159.69690-1-daniel.lezcano@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTA3MDExMCBTYWx0ZWRfX0YNrqCZk+q5/ zIeim/D2sCQIUaEe339NSxipSqT9ktmbkJh+H0Vevo+5KNui2VaI9RR122m3604HSC7VUbeZX9P +AT5O9f8XZdMptmWcXkEZgjxZKnN8Zi4gY3ul1kc53n7oM0WRzMpl5PZfclVJCT7G8xnqiDD8fi iMgpbZJ5TAnJ/oyLb1r1+EzOwhBU2CzLnvQaJ5A5IfAUP2K9iN4QES/oGJJtB+Ilgb7wlS/A4vT vBiV1WrMs+3AZWl7blv1e7Q0Us2Z053F1OJSqZvIvPVBxwYuYDcuRo19GHcXXRvSrfymY5Enyu7 WadHcYQj4dxCeKMHBxVAR8DklbT5uLmyHS6YQCo+lujlI8viYrUom3wYpz3I2VGnBkotSwXBzZp kAifzSA0sL7qamzRk4g6c+xKEv+aslNJupeVy0pYuENVPuM9tiHdGEOE1rkPj2dirE1XQ38Js68 OV5wz5GOB+MWMXEUkJA== X-Proofpoint-Spam-Info: AW1haW4tMjYwOTA3MDExMCBTYWx0ZWRfX2mVTPn6jrB5a y6Pvqwzm6b54YlZvLeBQbo7HE3iixFLCpfT5SilxjK2Enj94eXkMHnQxS1p94PL7wnTNVBqzcdm HwSJhkVrpr0/LIFPra6MY6KpduVWFek= X-Proofpoint-ORIG-GUID: MC3-i1xTHx6AkMRP9OTLQl_RcHOZBB-b X-Authority-Analysis: v=2.4 cv=U6aiy+ru c=1 sm=1 tr=0 ts=6a9e8bda cx=c_pps a=7E5Bxpl4vBhpaufnMqZlrw==:117 a=xqWC_Br6kY4A:10 a=IkcTkHD0fZMA:10 a=VdqzKS8jKosA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=3WHJM1ZQz_JShphwDgj5:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=sDQwJVceT08lulBnrQ0A:9 a=QEXdDO2ut3YA:10 a=pJ04lnu7RYOZP9TFuWaZ:22 X-Proofpoint-GUID: MC3-i1xTHx6AkMRP9OTLQl_RcHOZBB-b X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-09-07_02,2026-09-07_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 adultscore=0 impostorscore=0 phishscore=0 clxscore=1015 lowpriorityscore=0 malwarescore=0 priorityscore=1501 spamscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2609070110 Hi Rafael, On 8/6/26 13:01, Daniel Lezcano wrote: > Powercap controllers frequently expose a hierarchy of power zones (for > example package, clusters and CPUs). Until now, each driver had to > implement its own hierarchy traversal, parent lookup, error handling and > teardown logic. > > This series introduces a generic hierarchy description and helper > functions allowing a controller to instantiate and destroy an entire > powercap hierarchy from a static description. The framework takes care of > duplicating the hierarchy description, rebasing parent pointers, > creating zones in dependency order and performing the appropriate > rollback and cleanup on errors. > > The series also adds a kselftest exercising the new API by creating a > synthetic hierarchy, validating the exported sysfs hierarchy and > attributes, and ensuring that all resources are correctly released when > the hierarchy is destroyed. > > The patches are organized as follows: > > 1. powercap: Add generic zone hierarchy creation helpers > 2. selftests/powercap: Add powercap hierarchy creation API tests > > The API was primarily motivated by the recently posted SPEL series and > also provides a migration path for DTPM to use the same generic > infrastructure instead of maintaining its own hierarchy handling. > > Link: SPEL cover letter > > Daniel Lezcano (2): > powercap: Add generic zone hierarchy creation helpers > selftests/powercap: Add powercap hierarchy creation API tests > > -- It was easy to migrate DTPM to this API and AFAICT Manaf was able to migrate also its series to this new API. Is it possible to consider it for merging ? Thanks -- Daniel [1] https://lore.kernel.org/all/20260819165605.1398880-1-daniel.lezcano@oss.qualcomm.com/ [2] https://lore.kernel.org/all/20260702-qcom_spel_driver_upstream-v3-0-434d50f0c5b0@oss.qualcomm.com/