From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CC19E344D8D; Tue, 7 Apr 2026 04:55:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775537702; cv=none; b=OJVZVTuFn/+V4tQi+eyjLkJZpvOlVSFElIqcZPYwdBKf0mxRksYxpDN6W7TGDneoCQKMp/5NOzDM9cuq6x5OsOBw0iyYthSLDJRxk7AgPkBYNlJXGbowpC1JglMpXTJiklrsXreHk+EqKy827Tw/eoUifxMROaR39J657Knn31E= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775537702; c=relaxed/simple; bh=rvu7/o0Lwq7mvoGpGDMuVDAnB7mMlRjy9d5tc7U+Cb8=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=oPHX+qalhQLEAB2+ra1xXAjTnTBXIYGWYVyGkeJPGER6wr5dDd0CBpcVRT7EMZJDfItccG6L+Ur045mZgNf4eJQJwsfmcPPqu3J1zMP/zdcQk6UqWfVam5DLCIqhSaXWbLeKKbQbq7LYo18hB7Rae9ILxF/zNFM/g+drjXdfed8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=og8fhcTr; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="og8fhcTr" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 60815C116C6; Tue, 7 Apr 2026 04:54:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775537702; bh=rvu7/o0Lwq7mvoGpGDMuVDAnB7mMlRjy9d5tc7U+Cb8=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=og8fhcTrcSW1XpExdd/a68mQ3sOlxr3SXLyjG8HBdY4XWYM29iTLx0Vs0oZzLQBYD tu/RPZiAfSuTwJv5JHbdFaiitpZ6bXxgjdlLLxffWjK89/+jrNtXEyaJ4DJU/d0LCi R6uKK10Vn0UY5G1a0lvKWQphTQ5vpl4v7DMcIZPNotI5UlcQAmshX1P/Wvpvltcgkl vD400kR01f5mLCkLuTrZxTVTIz3eLkCsqiEBguYacQ0aKOGIUaWkZrKUIb0uWeIiYs L/vTx3jbOsZk2PnifHxjEUKls3C4t+Wnbflcd+lJMRWwJLFmxogFFi7/Fue/xF+WPg BLYdUjWFdKV2w== Date: Tue, 7 Apr 2026 10:24:44 +0530 From: Sumit Garg To: Bjorn Andersson Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-media@vger.kernel.org, netdev@vger.kernel.org, linux-wireless@vger.kernel.org, ath12k@lists.infradead.org, linux-remoteproc@vger.kernel.org, konradybcio@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, robin.clark@oss.qualcomm.com, sean@poorly.run, akhilpo@oss.qualcomm.com, lumag@kernel.org, abhinav.kumar@linux.dev, jesszhan0024@gmail.com, marijn.suijten@somainline.org, airlied@gmail.com, simona@ffwll.ch, vikash.garodia@oss.qualcomm.com, dikshita.agarwal@oss.qualcomm.com, bod@kernel.org, mchehab@kernel.org, elder@kernel.org, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, jjohnson@kernel.org, mathieu.poirier@linaro.org, trilokkumar.soni@oss.qualcomm.com, mukesh.ojha@oss.qualcomm.com, pavan.kondeti@oss.qualcomm.com, jorge.ramirez@oss.qualcomm.com, tonyh@qti.qualcomm.com, vignesh.viswanathan@oss.qualcomm.com, srinivas.kandagatla@oss.qualcomm.com, amirreza.zarrabi@oss.qualcomm.com, jens.wiklander@linaro.org, op-tee@lists.trustedfirmware.org, apurupa@qti.qualcomm.com, skare@qti.qualcomm.com, harshal.dev@oss.qualcomm.com, linux-kernel@vger.kernel.org, Sumit Garg Subject: Re: [PATCH v3 00/15] firmware: qcom: Add OP-TEE PAS service support Message-ID: References: <20260327131043.627120-1-sumit.garg@kernel.org> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: 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 > > > > 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