Re: [PATCH 02/20] arm64: dts: qcom: Introduce Kaanapali SoC

Konrad Dybcio
2025-11-05T10:13:51Z

On 11/5/25 8:30 AM, Jingyi Wang wrote:
>
>
> 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.

I think we're well past that date though? OnePlus website says I can order
their new flagship next week..

Konrad