All existing Kodiak board variants run the Gunyah hypervisor, which
means Linux can only boot at EL1 on those devices. It is possible to
boot Linux at EL2 on the qcm6490-idp and qcs6490-rb3gen2 variants;
this series adds the DT overlay that describes the IOMMU streams and
other kernel-owned resources needed in that mode.

Patch 1 is a small independent cleanup of the two board .dts files:
keep the wlan_ce_mem reserved region (its /delete-node/ was erroneous)
and drop the redundant wifi memory-region override that duplicates
kodiak.dtsi. Patch 2 adds the kodiak-el2.dtso overlay and wires up
the -el2.dtb variants in the Makefile.

Changes in v10: https://lore.kernel.org/lkml/20260706161428.3764398-1-mukesh.ojha@oss.qualcomm.com/
 - Split the wlan_ce_mem retention and the redundant memory-region
   removal in qcm6490-idp.dts / qcs6490-rb3gen2.dts into its own patch. [Dmitry]
 - Drop status = "okay"; from &wifi in the overlay so platforms
   without wifi enabled in the base .dts are unaffected. [Dmitry]

Changes in v9: https://lore.kernel.org/lkml/20260624063952.2242702-1-mukesh.ojha@oss.qualcomm.com/
 - Instead of adding wlan_ce_mem back in the EL2 overlay, stop
   deleting it in qcm6490-idp.dts / qcs6490-rb3gen2.dts so it is
   present for both EL1 and EL2. [Miaoqing]

Changes in v8: https://lore.kernel.org/lkml/20260522115936.201208-2-sumit.garg@kernel.org/
 - Added a wpss copy engine memory similar to chrome for Wifi to work.
 - WPSS does not have firmware Stream, so that was removed.
 - Added wifi streams similar to chrome for wifi to work.
 - Removed this patch from Generic Pas patch series, can be followed
   separately.
 - Moved Sumit as co-author as part of modification done to the patch
   in the past.
 - Added some more kodiak's board variants in the makefile.

Changes in v1-v7:
 - mpss was disabled and will be enabled once the dependencies patches
   get merged.

Mukesh Ojha (2):
  arm64: dts: qcom: qcm6490-idp/qcs6490-rb3gen2: Keep wlan_ce_mem and
    drop redundant wifi memory-region
  arm64: dts: qcom: kodiak: Add EL2 overlay

 arch/arm64/boot/dts/qcom/Makefile            | 12 ++++++
 arch/arm64/boot/dts/qcom/kodiak-el2.dtso     | 39 ++++++++++++++++++++
 arch/arm64/boot/dts/qcom/qcm6490-idp.dts     |  2 -
 arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts |  2 -
 4 files changed, 51 insertions(+), 4 deletions(-)
 create mode 100644 arch/arm64/boot/dts/qcom/kodiak-el2.dtso

--
2.53.0

This got messed up and went as a reply to v9. I will resend this
v10 as RESEND again. Sorry for the spam.

-Mukesh

On Mon, Jul 13, 2026 at 09:37:52PM +0530, Mukesh Ojha wrote:
> All existing Kodiak board variants run the Gunyah hypervisor, which
> means Linux can only boot at EL1 on those devices. It is possible to
> boot Linux at EL2 on the qcm6490-idp and qcs6490-rb3gen2 variants;
> this series adds the DT overlay that describes the IOMMU streams and
> other kernel-owned resources needed in that mode.
> 
> Patch 1 is a small independent cleanup of the two board .dts files:
> keep the wlan_ce_mem reserved region (its /delete-node/ was erroneous)
> and drop the redundant wifi memory-region override that duplicates
> kodiak.dtsi. Patch 2 adds the kodiak-el2.dtso overlay and wires up
> the -el2.dtb variants in the Makefile.
> 
> Changes in v10: https://lore.kernel.org/lkml/20260706161428.3764398-1-mukesh.ojha@oss.qualcomm.com/
>  - Split the wlan_ce_mem retention and the redundant memory-region
>    removal in qcm6490-idp.dts / qcs6490-rb3gen2.dts into its own patch. [Dmitry]
>  - Drop status = "okay"; from &wifi in the overlay so platforms
>    without wifi enabled in the base .dts are unaffected. [Dmitry]
> 
> Changes in v9: https://lore.kernel.org/lkml/20260624063952.2242702-1-mukesh.ojha@oss.qualcomm.com/
>  - Instead of adding wlan_ce_mem back in the EL2 overlay, stop
>    deleting it in qcm6490-idp.dts / qcs6490-rb3gen2.dts so it is
>    present for both EL1 and EL2. [Miaoqing]
> 
> Changes in v8: https://lore.kernel.org/lkml/20260522115936.201208-2-sumit.garg@kernel.org/
>  - Added a wpss copy engine memory similar to chrome for Wifi to work.
>  - WPSS does not have firmware Stream, so that was removed.
>  - Added wifi streams similar to chrome for wifi to work.
>  - Removed this patch from Generic Pas patch series, can be followed
>    separately.
>  - Moved Sumit as co-author as part of modification done to the patch
>    in the past.
>  - Added some more kodiak's board variants in the makefile.
> 
> Changes in v1-v7:
>  - mpss was disabled and will be enabled once the dependencies patches
>    get merged.
> 
> Mukesh Ojha (2):
>   arm64: dts: qcom: qcm6490-idp/qcs6490-rb3gen2: Keep wlan_ce_mem and
>     drop redundant wifi memory-region
>   arm64: dts: qcom: kodiak: Add EL2 overlay
> 
>  arch/arm64/boot/dts/qcom/Makefile            | 12 ++++++
>  arch/arm64/boot/dts/qcom/kodiak-el2.dtso     | 39 ++++++++++++++++++++
>  arch/arm64/boot/dts/qcom/qcm6490-idp.dts     |  2 -
>  arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts |  2 -
>  4 files changed, 51 insertions(+), 4 deletions(-)
>  create mode 100644 arch/arm64/boot/dts/qcom/kodiak-el2.dtso
> 
> --
> 2.53.0
> 

-- 
-Mukesh Ojha