From: Sumit Garg <sumit.garg@kernel.org>
To: Bjorn Andersson <andersson@kernel.org>
Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
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Sumit Garg <sumit.garg@oss.qualcomm.com>
Subject: Re: [PATCH v3 00/15] firmware: qcom: Add OP-TEE PAS service support
Date: Tue, 7 Apr 2026 10:24:44 +0530 [thread overview]
Message-ID: <adSOFCL26y5qt1Cu@sumit-xelite> (raw)
In-Reply-To: <adPLx3nCBb8IHz2b@baldur>
Hi Bjorn,
On Mon, Apr 06, 2026 at 10:09:27AM -0500, Bjorn Andersson wrote:
> On Fri, Mar 27, 2026 at 06:40:28PM +0530, Sumit Garg wrote:
> > From: Sumit Garg <sumit.garg@oss.qualcomm.com>
> >
> > Qcom platforms has the legacy of using non-standard SCM calls
> > splintered over the various kernel drivers. These SCM calls aren't
> > compliant with the standard SMC calling conventions which is a
> > prerequisite to enable migration to the FF-A specifications from Arm.
> >
>
> Please get our colleagues involved in this discussion, because this
> non-SCM interface does not match the direction we are taking.
I thought I have already involved folks from QTEE perspective (Apurupa
and Sree) actively working on FF-A implementation aligned to this
interface. It would have been better if you could let me know where is
the direction mismatch here. In case there is a better alternative
design proposal for PAS service with FF-A, I would be happy to hear
that.
Anyhow for the legacy SoCs like KLMT, we really don't have any
alternative but have to stick to existing QTEE PAS design with OP-TEE
providing as an alternative backend. Surely we want to support loading
of existing signed firmware present in linux-firmware repo for KLMT with
OP-TEE being the TZ.
-Sumit
prev parent reply other threads:[~2026-04-07 4:55 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-27 13:10 [PATCH v3 00/15] firmware: qcom: Add OP-TEE PAS service support Sumit Garg
2026-03-27 13:10 ` [PATCH v3 01/15] arm64: dts: qcom: kodiak: Add EL2 overlay Sumit Garg
2026-03-27 13:10 ` [PATCH v3 02/15] firmware: qcom: Add a generic PAS service Sumit Garg
2026-03-27 13:10 ` [PATCH v3 03/15] firmware: qcom_scm: Migrate to " Sumit Garg
2026-03-27 13:10 ` [PATCH v3 04/15] firmware: qcom: Add a PAS TEE service Sumit Garg
2026-03-30 10:36 ` Harshal Dev
2026-04-02 6:23 ` Sumit Garg
2026-03-27 13:10 ` [PATCH v3 05/15] remoteproc: qcom_q6v5_pas: Switch over to generic PAS TZ APIs Sumit Garg
2026-03-27 13:10 ` [PATCH v3 06/15] remoteproc: qcom_q6v5_mss: Switch " Sumit Garg
2026-03-27 13:10 ` [PATCH v3 07/15] soc: qcom: mdtloader: " Sumit Garg
2026-03-27 13:10 ` [PATCH v3 08/15] remoteproc: qcom_wcnss: " Sumit Garg
2026-03-27 13:10 ` [PATCH v3 09/15] remoteproc: qcom: Select QCOM_PAS generic service Sumit Garg
2026-03-27 13:10 ` [PATCH v3 10/15] drm/msm: Switch to generic PAS TZ APIs Sumit Garg
2026-03-27 13:10 ` [PATCH v3 11/15] media: qcom: " Sumit Garg
2026-04-03 9:37 ` Jorge Ramirez
2026-04-06 11:42 ` Sumit Garg
2026-03-27 13:10 ` [PATCH v3 12/15] net: ipa: " Sumit Garg
2026-03-27 13:10 ` [PATCH v3 13/15] wifi: ath12k: " Sumit Garg
2026-03-27 13:10 ` [PATCH v3 14/15] firmware: qcom_scm: Remove SCM PAS wrappers Sumit Garg
2026-03-27 13:10 ` [PATCH v3 15/15] MAINTAINERS: Add maintainer entry for Qualcomm PAS TZ service Sumit Garg
2026-04-06 15:09 ` [PATCH v3 00/15] firmware: qcom: Add OP-TEE PAS service support Bjorn Andersson
2026-04-07 4:54 ` Sumit Garg [this message]
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