Re: [PATCH v8] arm64: dts: qcom: kodiak: Add EL2 overlay

[Konrad Dybcio]

On 6/29/26 2:22 PM, Mukesh Ojha wrote:
> On Mon, Jun 29, 2026 at 01:36:34PM +0200, Konrad Dybcio wrote:
>> On 6/25/26 3:14 AM, Miaoqing Pan wrote:
>>>
>>>
>>> On 6/24/2026 2:39 PM, Mukesh Ojha wrote:
>>>> All the existing variants Kodiak boards are using Gunyah hypervisor
>>>> which means that, so far, Linux-based OS could only boot in EL1 on those
>>>> devices.  However, it is possible for us to boot Linux at EL2 on these
>>>> devices [1].
>>
>> [...]
>>
>>> Is it necessary to redefine |wlan_ce_mem|? Can we consider updating |qcs6490-rb3gen2.dts|?
>>> I have verified that with the following changes, *NON-KVM works fine*, and |wlan_ce_mem| is only used by the WCN6750 firmware.
>>
>> Is there a good reason non-chrome devices never defined that region in
>> the first place?
> 
> This region is needed by WPSS and non-Chrome (Gunyah) has IOMMU
> control, maps it for WPSS during boot up while Linux at EL2 needs
> to map it for WPSS in Gunyah's absence.

Right, I'm asking about it usefulness on devices *with* Gunyah

Konrad