Re: [PATCH v6 01/14] dt-bindings: remoteproc: qcom,pas: Add iommus property

[Konrad Dybcio]

On 11/5/25 9:34 AM, Mukesh Ojha wrote:
> 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.

For added context, QHEE (pre-Gunyah hyp) has been with us almost forever

Konrad