6.18.y: Support to bring el2 overlay support for Monaco and Talos #203
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…uration We don't need to use zap shader in EL2 as Linux can zap the gpu on it's own. Lets disable zap-shader for Lemans EL2 configuration. Link: https://lore.kernel.org/lkml/20260127-talos-el2-overlay-v2-1-b6a2266532c4@oss.qualcomm.com/ Signed-off-by: Mukesh Ojha <mukesh.ojha@oss.qualcomm.com>
All the Monaco IOT variants 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]. When running under Gunyah, the remote processor firmware IOMMU streams are controlled by Gunyah. However, without Gunyah, the IOMMU is managed by the consumer of this DeviceTree. Therefore, describe the firmware streams for each remote processor. Add a EL2-specific DT overlay and apply it to Monaco IOT variant devices to create -el2.dtb for each of them alongside "normal" dtb. [1] https://docs.qualcomm.com/bundle/publicresource/topics/80-70020-4/boot-developer-touchpoints.html#uefi Link: https://lore.kernel.org/lkml/20260127-talos-el2-overlay-v2-2-b6a2266532c4@oss.qualcomm.com/ Signed-off-by: Mukesh Ojha <mukesh.ojha@oss.qualcomm.com>
All the existing variants Talos 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]. When running under Gunyah, the remote processor firmware IOMMU streams are controlled by Gunyah. However, without Gunyah, the IOMMU is managed by the consumer of this DeviceTree. Therefore, describe the firmware streams for each remote processor. Add a EL2-specific DT overlay and apply it to Talos IOT variant devices to create -el2.dtb for each of them alongside "normal" dtb. [1] https://docs.qualcomm.com/bundle/publicresource/topics/80-70020-4/boot-developer-touchpoints.html#uefi Link: https://lore.kernel.org/lkml/20260127-talos-el2-overlay-v2-3-b6a2266532c4@oss.qualcomm.com/ Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com> Signed-off-by: Mukesh Ojha <mukesh.ojha@oss.qualcomm.com>
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Komal-Bajaj
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Jan 28, 2026
Tests-kaanapali-qrd
Tests-lemans-evk
Tests-qcs615-ride
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Link: https://lore.kernel.org/lkml/20260127-talos-el2-overlay-v2-0-b6a2266532c4@oss.qualcomm.com/
CRs-Fixed: 4418553