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Wysocki" , Daniel Lezcano , Christian Loehle , Lee Jones , Ulf Hansson , Pavan Kondeti , Abel Vesa , Bartosz Golaszewski , Sudeep Holla , Andy Yan References: <20260928-arm-psci-system_reset2-vendor-reboots-v26-0-b24e2348e8e1@oss.qualcomm.com> Content-Language: en-US From: Shivendra Pratap In-Reply-To: <20260928-arm-psci-system_reset2-vendor-reboots-v26-0-b24e2348e8e1@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Authority-Analysis: v=2.4 cv=evJKXYpX c=1 sm=1 tr=0 ts=6acce427 cx=c_pps a=Uww141gWH0fZj/3QKPojxA==:117 a=j4ogTh8yFefVWWEFDRgCtg==:17 a=IkcTkHD0fZMA:10 a=660iZSQnnn4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=yOCtJkima9RkubShWh1s:22 a=VwQbUJbxAAAA:8 a=pGLkceISAAAA:8 a=06DCG69OefxHWCB5cYgA:9 a=QEXdDO2ut3YA:10 a=PxkB5W3o20Ba91AHUih5:22 X-Proofpoint-Spam-Info: AW1haW4tMjYxMDEyMDA1NCBTYWx0ZWRfXxI65PstJIUsE 7tnnRngTgIXM1I0xJxNKge29pnH/gK06Os9uLpc3yF37aKI/na+dqagiR/Ilahdr1LX5khyKE8P tGZZazqBqv+tkrYSjtWS6sOXFM6UgNI= X-Proofpoint-GUID: ENPVRodMUE52ZZcR7N7FseP0nES_SmP3 X-Proofpoint-ORIG-GUID: ENPVRodMUE52ZZcR7N7FseP0nES_SmP3 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDEyMDA1NCBTYWx0ZWRfX9C/msjZBFIm1 5Tdm+1pch39L8YFmlc4bLSEMuIXzJASV3Q69r9+fyakrPAMiy+aiRf5HRnrTmmNcLBSaF+F2Yzl dL1I02yFJ6diTReryuvnCDnec2xVVs9nakSRljBxuRsf27qXsHmyjibFR7OStbWegw+NfL2eVK4 Q0jj2kBXaVkLGa6r1ljjDhCxFGSX2fqs8BHZ4dzWNQG22dfGxqJrkLEY4/drqwTnhlVRTzFWgc7 1fUPtBiplnbv5zc6wQrisxWrihY6SHTMpTjfbakG+bRFeL21dFI+cZaQDmOU1C+ZuQA+li4slwl 77PigpgrORze6DGx9OVSf2opx9tDiJso2N7SqaleuW6p4LaMF9vGbZoa1qYCZcT9q7wG9DhMeNu ygTVGJwTyCb00yNlppkUg8Huy9bvJsfV3geZEnWZJJEEWqGjhzyrJyuJr6p1CBXzqkGj9pc2zLn KuNoYBpODUpFoCwqQRA== 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=2026-10-12_04,2026-10-09_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 clxscore=1015 impostorscore=0 lowpriorityscore=0 bulkscore=0 phishscore=0 adultscore=0 suspectscore=0 malwarescore=0 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610080000 definitions=main-2610120054 On 9/28/2026 11:39 AM, Shivendra Pratap wrote: > Userspace should be able to initiate device reboots using the various > PSCI SYSTEM_RESET and SYSTEM_RESET2 types defined by PSCI spec. This > patch series introduces psci-reboot-mode driver that will induce > command-based resets to psci driver for executing the device reset. > > The PSCI system reset calls takes two arguments: reset_type and cookie. > It defines predefined reset types, such as warm and cold reset, and > vendor-specific reset types which are SoC vendor specific. To support > these requirements, the reboot-mode framework is enhanced in two key > ways: > 1. Support upto three 32 bit magic values as arguments. This enables to > support for a 32 bit reset_type and a 64 bit cookie). > 2. Predefined modes: Add support for predefined reboot modes in the > framework. > > With these enhancements, the patch series enables: > - Arch Warm reset and system reset cold as predefined reboot modes. > - Vendor-specific resets, configurable via the SoC-specific device tree. > > Together, these changes allow userspace to trigger all above PSCI resets > from userspace. > > Note on introducing psci aux devices: > Based on feedback from Bart, Lee and Ufee, PSCI child functionality now > uses aux devices instead of an MFD driver, with psci-cpuidle-domain and > psci-reboot-mode probed through a common PSCI aux device enumerator. > Reference discussions on this: > https://lore.kernel.org/all/CAPx+jO9Hi2R_UnCEhsXLwf74c3RTb+RodaJ6SOVXbQX_eHt++A@mail.gmail.com/ Hi Lorenzo, I am planning to send a minor update to remove some unnecessary headers from psci-reboot-mode.c. Could you please take a look and share any review comments so I can address them in the next version? thanks, Shivendra