On Wed, Nov 05, 2025 at 08:17:14AM +0100, Krzysztof Kozlowski wrote: > On 04/11/2025 08:35, Mukesh Ojha wrote: > > Most Qualcomm platforms feature Gunyah hypervisor which handles IOMMU > > I don't think that's true. Washn't Gunyah something new? Like since > SM8550? Look how many Qualcomm platforms we have in the arm/qcom.yaml > bindings - for sure most of them are not post SM8550.
I should have rephrased it, thanks "Qualcomm platform which feature QHEE based hypervisor or a module in Gunyah ... " > > > configuration for remote processor and when it is not present, the > > operating system must perform these configurations instead and for that > > firmware stream should be presented to the operating system. Hence, add > > iommus property as optional property for PAS supported devices. > > So which platforms actually need to do this? As I said above, almost every platform which features QHEE or Gunyah hypervisor that support PAS based remoteproc subsystem should have this. > > I really do not understand why you are adding this to SDX55 and several > others. Firmware IOMMU context bank was always managed by QHEE hypervisor or Gunyah it is more of never mentioned schema in PAS schema. So, even SDX55 should have these as optional. > > > > Best regards, > Krzysztof -- -Mukesh Ojha
