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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-29601998ff7sm50804145ad.44.2025.11.04.23.30.23 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 04 Nov 2025 23:30:26 -0800 (PST) Message-ID: Date: Wed, 5 Nov 2025 15:30:20 +0800 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 02/20] arm64: dts: qcom: Introduce Kaanapali SoC To: Konrad Dybcio , Akhil P Oommen , Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, aiqun.yu@oss.qualcomm.com, tingwei.zhang@oss.qualcomm.com, trilok.soni@oss.qualcomm.com, yijie.yang@oss.qualcomm.com, Tengfei Fan References: <20250924-knp-dts-v1-0-3fdbc4b9e1b1@oss.qualcomm.com> <20250924-knp-dts-v1-2-3fdbc4b9e1b1@oss.qualcomm.com> <36fcea98-06a6-4ca7-a378-77b44b196a9d@oss.qualcomm.com> <7fc6ab09-44c9-434c-ab19-764c74b1176b@oss.qualcomm.com> <7f8aa7b5-40b6-456d-8b33-0cd505a6bc3c@oss.qualcomm.com> Content-Language: en-US From: Jingyi Wang In-Reply-To: <7f8aa7b5-40b6-456d-8b33-0cd505a6bc3c@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Proofpoint-GUID: iegOxAIe-FNdPUQQXYPvIc2cjMcoiYah X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMTA1MDA1MyBTYWx0ZWRfX4fEDIh8CGTh5 VcIbv0MtFhO73vIwbMCOoVdkOJMsmwbzSxZWPjM5hXRaR7Rmw1bPMGb9UYGbsy5Dac/k8LpYsqh abk3tirM9AhozSRUbY5CKUK7biQbIudYPaSVGdoNDLXkxh10KeiIB6VrOkR2OBOIcYxXjt6igpO +w/U4pMK7msNWZ9VJMOOQNkLMvbHlAyXzbzrkhaOqyByzB7b4cyKMe310GGJMhK9jcz9DI37Lr8 SnZtq3DSmKc3Cg0rdK2xw6A09wRjBzwnuqBVWVhKr1FBavW9YIubXm7RDy5uJ6SuZzPo0fjKyDP LOqE15fcNIrs8zBP185wiXPSfFPVz49hmPpVPQnSfEO5wuvokHYsUgfOOrw6KLnOeXMtFcJgOMk R4BezYOZmEyT1efpdWsMDkE3ixlbkQ== X-Proofpoint-ORIG-GUID: iegOxAIe-FNdPUQQXYPvIc2cjMcoiYah X-Authority-Analysis: v=2.4 cv=Ev3fbCcA c=1 sm=1 tr=0 ts=690afd14 cx=c_pps a=0uOsjrqzRL749jD1oC5vDA==:117 a=nuhDOHQX5FNHPW3J6Bj6AA==:17 a=IkcTkHD0fZMA:10 a=6UeiqGixMTsA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=VwQbUJbxAAAA:8 a=COk6AnOGAAAA:8 a=kzD8ydeIdvGHlAoY_TIA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=mQ_c8vxmzFEMiUWkPHU9:22 a=TjNXssC_j7lpFel5tvFf:22 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=2025-11-05_03,2025-11-03_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 phishscore=0 priorityscore=1501 bulkscore=0 suspectscore=0 adultscore=0 malwarescore=0 lowpriorityscore=0 spamscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2510240001 definitions=main-2511050053 On 11/4/2025 8:54 PM, Konrad Dybcio wrote: > On 11/4/25 10:04 AM, Jingyi Wang wrote: >> >> >> On 10/14/2025 7:46 PM, Akhil P Oommen wrote: >>> >>> >>> On 9/25/2025 5:47 AM, Jingyi Wang wrote: >>>> Kaanapali is Snapdragon SoC from Qualcomm. >>>> >> <...> >>>> + >>>> +    reserved-memory { >>>> +        #address-cells = <2>; >>>> +        #size-cells = <2>; >>>> +        ranges; >>>> + >>> >>> This is missing a bunch of reserved regions which causes device crash when you stress memory allocation. >>> >>> -Akhil. >>> >> >> Hi Akhil, >> >> We will not add all the reserved-memory in dts, other regions are designed to >> be added in bootloader. > > If what Akhil says is true and Linux is crashing, something must be > wrong.. > > Konrad Hi Konrad, There was discussion about the reserved memory in QCS8550 change. And the conclusion is that reserved memory regions which aren't relevant to the kernel(like the hypervisor region) don't need to be described in DT to avoid memory map change and update frequently. These regions will be runtime added through bootloader. ref:https://lore.kernel.org/all/20240618072202.2516025-3-quic_tengfan@quicinc.com/ The bootloader we currently use for Kaanapali has not supported this, and we have solutions like add temp change to add these in DTS until the final bootloader is provided. Thanks, Jingyi