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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <2c9c3a85-3702-45a0-81bc-f6464f8f02b5@oss.qualcomm.com>
Date: Wed, 5 Nov 2025 10:10:56 +0100
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Mukesh Ojha <mukesh.ojha@....qualcomm.com>,
        Krzysztof Kozlowski <krzk@...nel.org>
Cc: Bjorn Andersson <andersson@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
 <conor+dt@...nel.org>,
        Manivannan Sadhasivam <mani@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, linux-arm-msm@...r.kernel.org,
        linux-remoteproc@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Bryan O'Donoghue <bryan.odonoghue@...aro.org>
Subject: Re: [PATCH v6 01/14] dt-bindings: remoteproc: qcom,pas: Add iommus
 property

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