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[79.144.197.187]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4889cb46adcsm383692655e9.4.2026.04.08.00.32.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 08 Apr 2026 00:32:42 -0700 (PDT) From: Jorge Ramirez X-Google-Original-From: Jorge Ramirez Date: Wed, 8 Apr 2026 09:32:39 +0200 To: Trilok Soni Cc: Sumit Garg , Jorge Ramirez , vikash.garodia@oss.qualcomm.com, 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, andersson@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, 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, mukesh.ojha@oss.qualcomm.com, pavan.kondeti@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 11/15] media: qcom: Switch to generic PAS TZ APIs Message-ID: References: <20260327131043.627120-1-sumit.garg@kernel.org> <20260327131043.627120-12-sumit.garg@kernel.org> <439f9bbf-1ba1-465f-b5af-01ba0ebb86d4@oss.qualcomm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <439f9bbf-1ba1-465f-b5af-01ba0ebb86d4@oss.qualcomm.com> X-Proofpoint-ORIG-GUID: _GhAfeJyb1oBWAoKEriY32AfsYeaQJ0A X-Proofpoint-GUID: _GhAfeJyb1oBWAoKEriY32AfsYeaQJ0A X-Authority-Analysis: v=2.4 cv=TOt1jVla c=1 sm=1 tr=0 ts=69d6049c cx=c_pps a=mPf7EqFMSY9/WdsSgAYMbA==:117 a=VPdg2FrOqWfiVCzsz0q0YA==:17 a=kj9zAlcOel0A:10 a=A5OVakUREuEA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=3WHJM1ZQz_JShphwDgj5:22 a=EUspDBNiAAAA:8 a=YTLieAA4xaQwPRX2avwA:9 a=CjuIK1q_8ugA:10 a=dawVfQjAaf238kedN5IG:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDA4MDA2NyBTYWx0ZWRfX5B8GNb8UiblX iL5nj+NJwshLahgUc1hXCyuiGnNoQQsUcH2oDuL075RPLrBptC7XhLBwkVeppm38RbzYU/qoVIK PcRajNN1zHR+0a7fjaIkSmQHsjhFlOvjXxGuIg42s0BE59vPtQuJk9p7EpcxcHsJ1PAtfO4yWBU yORPy5wDFPX//mRJD15Qqb8334MX15R8EGiF+L4MII/tBS+zqM9Bbc/eHcVd8y6B8p/Ttnur3O5 MjtyTKhF6aUQu2cw1Lp42TR2uTBX5F14SxQHo0bJASnMM7HPbrheEdpLCtZaJX4FW4BOhbVSz7L C6lFyszPb3agZ2ySVrr65DOI6WRHm9gcnWppd3h52mgpyJLOrFjcH2Mk6Z3yMx89FayxULkQ9WA 0GsTI98ZMi6bXes7ZvaWRxrvJ0re5q1wOg9bLwic1qNnS1qqLnn3Rqc3ltZc1ugITHtPwwZ6E04 T7fRjJvGrSOVouo9vMw== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-04-08_03,2026-04-07_05,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 suspectscore=0 spamscore=0 adultscore=0 impostorscore=0 lowpriorityscore=0 phishscore=0 bulkscore=0 clxscore=1015 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604010000 definitions=main-2604080067 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260408_003245_998416_86876605 X-CRM114-Status: GOOD ( 28.33 ) X-BeenThere: ath12k@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "ath12k" Errors-To: ath12k-bounces+ath12k=archiver.kernel.org@lists.infradead.org On 07/04/26 15:14:22, Trilok Soni wrote: > On 4/6/2026 4:42 AM, Sumit Garg wrote: > > Hi Jorge, > > > > On Fri, Apr 03, 2026 at 11:37:07AM +0200, Jorge Ramirez wrote: > >> On 27/03/26 18:40:39, Sumit Garg wrote: > >>> From: Sumit Garg > >>> > >>> Switch qcom media client drivers over to generic PAS TZ APIs. Generic PAS > >>> TZ service allows to support multiple TZ implementation backends like QTEE > >>> based SCM PAS service, OP-TEE based PAS service and any further future TZ > >>> backend service. > >> > >> OP-TEE based PAS service relies on the linux driver to configure the > >> iommu (just as it is done on the no_tz case). This generic patch does > >> not cover that requirement. > > > > That's exactly the reason why the kodiak EL2 dtso disables venus by > > default in patch #1 due to missing IOMMU configuration. > > > >> > >> Because of that, it is probably better if the commit message doesnt > >> mention OP-TEE and instead maybe indicate that PAS wll support TEEs that > >> implement the same restrictions that QTEE (ie, iommu configuration). > > > > The scope for this patch is to just adopt the generic PAS layer without > > affecting the client functionality. the patchset cover letter + the commit message + the OP-TEE pull request being referenced gives the ilusion to users that with the current set they will get something functional (they will get a broken video platform instead if they try to use OP-TEE). That was the point I was making: IMO the commit message walks on a thin line of "completeness" QTEE and OP-TEE at this time implement different use cases (Venus with QTEE runs with Linux on EL1 , OP-TEE runs with Linux on EL2). So maybe worth mentioning this divergence. > > > >> > >> I can send an RFC for OP-TEE support based on the integration work being > >> carried out here [1] > > > > @Vikash may know better details about support for IOMMU configuration > > for venus since it's a generic functionality missing when Linux runs in > > EL2 whether it's with QTEE or OP-TEE. > > > > However, feel free to propose your work to initiate discussions again. > > Vikas and team depends on some of the IOMMU patches to get accepted > before they enable the EL2 venus support. Please reach out to him > and Prakash Gupta at Qualcomm. isn't Vikash in this thread, he can ping me too no :) ? but sure, we'll synch later From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.trustedfirmware.org (lists.trustedfirmware.org [18.214.241.189]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 25787FD5F85 for ; Wed, 8 Apr 2026 07:32:52 +0000 (UTC) Received: from lists.trustedfirmware.org (localhost [127.0.0.1]) by lists.trustedfirmware.org (Postfix) with ESMTP id 2191243EAA for ; Wed, 8 Apr 2026 07:32:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=lists.trustedfirmware.org; s=2024; t=1775633572; bh=OveXBMU2Rs8ereI1m9UptjRMaYvkzfBMcmK+hgcieTk=; h=Date:To:Subject:References:In-Reply-To:CC:List-Id:List-Archive: List-Help:List-Owner:List-Post:List-Subscribe:List-Unsubscribe: From:Reply-To:From; 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ALIAS_RESOLVED(0.00)[]; ASN(0.00)[asn:22843, ipnet:205.220.180.0/24, country:US]; RCVD_VIA_SMTP_AUTH(0.00)[]; TO_DN_SOME(0.00)[] X-Rspamd-Server: lists.trustedfirmware.org X-Rspamd-Queue-Id: 831AE409FE X-Spamd-Bar: ---- Message-ID-Hash: 7XWZHKHXZEHV2UD47JNNQLCE7DTXF3OM X-Message-ID-Hash: 7XWZHKHXZEHV2UD47JNNQLCE7DTXF3OM X-MailFrom: jorge.ramirez@oss.qualcomm.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-op-tee.lists.trustedfirmware.org-0; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header CC: Sumit Garg , Jorge Ramirez , vikash.garodia@oss.qualcomm.com, 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, andersson@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, 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, mukesh.ojha@oss.qualcomm.com, pavan.kondeti@oss.qualcom m.com, tonyh@qti.qualcomm.com, vignesh.viswanathan@oss.qualcomm.com, srinivas.kandagatla@oss.qualcomm.com, amirreza.zarrabi@oss.qualcomm.com, 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 X-Mailman-Version: 3.3.5 Precedence: list List-Id: Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: From: Jorge Ramirez via OP-TEE Reply-To: Jorge Ramirez On 07/04/26 15:14:22, Trilok Soni wrote: > On 4/6/2026 4:42 AM, Sumit Garg wrote: > > Hi Jorge, > > > > On Fri, Apr 03, 2026 at 11:37:07AM +0200, Jorge Ramirez wrote: > >> On 27/03/26 18:40:39, Sumit Garg wrote: > >>> From: Sumit Garg > >>> > >>> Switch qcom media client drivers over to generic PAS TZ APIs. Generic PAS > >>> TZ service allows to support multiple TZ implementation backends like QTEE > >>> based SCM PAS service, OP-TEE based PAS service and any further future TZ > >>> backend service. > >> > >> OP-TEE based PAS service relies on the linux driver to configure the > >> iommu (just as it is done on the no_tz case). This generic patch does > >> not cover that requirement. > > > > That's exactly the reason why the kodiak EL2 dtso disables venus by > > default in patch #1 due to missing IOMMU configuration. > > > >> > >> Because of that, it is probably better if the commit message doesnt > >> mention OP-TEE and instead maybe indicate that PAS wll support TEEs that > >> implement the same restrictions that QTEE (ie, iommu configuration). > > > > The scope for this patch is to just adopt the generic PAS layer without > > affecting the client functionality. the patchset cover letter + the commit message + the OP-TEE pull request being referenced gives the ilusion to users that with the current set they will get something functional (they will get a broken video platform instead if they try to use OP-TEE). That was the point I was making: IMO the commit message walks on a thin line of "completeness" QTEE and OP-TEE at this time implement different use cases (Venus with QTEE runs with Linux on EL1 , OP-TEE runs with Linux on EL2). So maybe worth mentioning this divergence. > > > >> > >> I can send an RFC for OP-TEE support based on the integration work being > >> carried out here [1] > > > > @Vikash may know better details about support for IOMMU configuration > > for venus since it's a generic functionality missing when Linux runs in > > EL2 whether it's with QTEE or OP-TEE. > > > > However, feel free to propose your work to initiate discussions again. > > Vikas and team depends on some of the IOMMU patches to get accepted > before they enable the EL2 venus support. Please reach out to him > and Prakash Gupta at Qualcomm. isn't Vikash in this thread, he can ping me too no :) ? but sure, we'll synch later