linux-kernel - Re: [PATCH v8 12/14] remoteproc: pas: Extend parse_fw callback to fetch resources via SMC call

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Message-ID: <2fc83dc4-16ab-470c-a6b2-379dc3e52744@oss.qualcomm.com>
Date: Mon, 24 Nov 2025 12:20:25 +0100
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Mukesh Ojha <mukesh.ojha@....qualcomm.com>,
        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>
Cc: linux-arm-msm@...r.kernel.org, linux-remoteproc@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v8 12/14] remoteproc: pas: Extend parse_fw callback to
 fetch resources via SMC call

On 11/21/25 12:01 PM, Mukesh Ojha wrote:
> Qualcomm remote processor may rely on static and dynamic resources for
> it to be functional. For most of the Qualcomm SoCs, when run with Gunyah
> or older QHEE hypervisor, all the resources whether it is static or
> dynamic, is managed by the hypervisor. Dynamic resources if it is
> present for a remote processor will always be coming from secure world
> via SMC call while static resources may be present in remote processor
> firmware binary or it may be coming from SMC call along with dynamic
> resources.
> 
> Remoteproc already has method like rproc_elf_load_rsc_table() to check
> firmware binary has resources or not and if it is not having then we
> pass NULL and zero as input resource table and its size argument
> respectively to qcom_scm_pas_get_rsc_table() and while it has resource
> present then it should pass the present resources to Trustzone(TZ) so that
> it could authenticate the present resources and append dynamic resource
> to return in output_rt argument along with authenticated resources.
> 
> Extend parse_fw callback to include SMC call to get resources from
> Trustzone and to leverage resource table parsing and mapping and
> unmapping code from the remoteproc framework.
> 
> Signed-off-by: Mukesh Ojha <mukesh.ojha@....qualcomm.com>
> ---

Reviewed-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>

Konrad