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

[Mukesh Ojha]

On Mon, Jun 29, 2026 at 04:08:26PM +0200, Konrad Dybcio wrote:
> 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

Ideally, it does not need to be mentioned in the OS device tree when
Gunyah is present as there is no user in OS..

> 
> Konrad

-- 
-Mukesh Ojha