Re: [PATCH v7 01/15] arm64: dts: qcom: kodiak: Add EL2 overlay
From: Mukesh Ojha <hidden>
Date: 2026-06-23 16:31:58
Also in:
ath12k, dri-devel, linux-arm-msm, linux-devicetree, linux-media, linux-remoteproc, linux-wireless, lkml, op-tee
On Fri, May 22, 2026 at 05:29:22PM +0530, Sumit Garg wrote:
From: Mukesh Ojha <redacted> 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]. 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 Kodiak IOT variant devices to create -el2.dtb for each of them alongside "normal" dtb. Note that modem and media subsystems haven't been supported yet due to missing dependencies. For GPU to work, zap shader is disabled and in EL2 mode the kernel owns hardware watchdog which is enabled here. [1] https://docs.qualcomm.com/bundle/publicresource/topics/80-70020-4/boot-developer-touchpoints.html#uefi Signed-off-by: Mukesh Ojha <redacted> [SG: watchdog and modem fixup] Signed-off-by: Sumit Garg <redacted>
As discussed internally, I will be taking this patch separately and you can drop this from series. -- -Mukesh Ojha