From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 AB2393EC812; Fri, 7 Aug 2026 08:51:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786092693; cv=none; b=u8owloOm0Uv1h/mD4WIx3hK1i7YH/gYgTIzUQvEwB11GL6ogSusXSJW5CdWvXMia312hk7epTDiPf5F9sDpw+9jAimWG7evJnWfew+uwA+5qSN7Wueik8WI9cQKBLq8H9hrK1VdwIcs/+p0LVcd4FfNwxxilc/SKKqveloVVCiY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786092693; c=relaxed/simple; bh=I+Eiz7/0JxWIupKwIb0quAT+zL2qYcarKFqPL59HulI=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=AJNYZPrFzdCapCOdkjJ5FHZjBc5kq5nZm9TxZGHamvJHCMVApOu9TsM86Syc/HMpP6gSqYikZ7THsk40HUJhAYWpCLrIoB7CdpGx0OBiwoYWXAPTt3vkv4iNzXJHYEVJIyaZxB0+wMdHfSByJel1XYziOPhBz2h/ePPk35/Nu/U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=XsS2dPal; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="XsS2dPal" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 971211F00A3A; Fri, 7 Aug 2026 08:51:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1786092692; bh=w/L0R+LFU9mVfCT45k6ZWYiIBiaxXWLtIQdg41M+M7w=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=XsS2dPal+tdOeRAz5nhXFzo9g2PTb3JBHHY010D9D4Pcdj9at/G3aJD6aNSbT20Br AtCtkDIeP6SU8xIvwe1iFasCqi6YpTICMrtM4KOt/Wcmd6Kzr7kr2r1xPIBbRzPy+u 2HBt+l7igCAgzSaK5vyyjmR4OmNVqt7HQWVb5D4M45ZCHv1fzWyh19450Pu4A+3qAD ZksM1GmBozKWyr6bZ6YaJchUqTgXgFK2GUjAAiwsL27jI3CuXYlEdQkEQSDcZNfApE LHaVeHljMTOq+AY05rSvtOefS1oOjvQHfdNXkR4ZzRgbsWzSlt6IlMg43Rdx5EB5rQ 0x2/DOEGfEQIA== Message-ID: <0b2c4f55-8e61-472e-92d0-05493f552c85@kernel.org> Date: Fri, 7 Aug 2026 09:51:22 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 00/22] media: iris: Restrict lower IOVA range for Venus and Iris VPUs To: Vikash Garodia , Dikshita Agarwal , Mauro Carvalho Chehab , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Stanimir Varbanov , Sakari Ailus , Abhinav Kumar , Stephan Gerhold , Bjorn Andersson , Stanimir Varbanov , Konrad Dybcio , Dmitry Baryshkov , Johan Hovold , Neil Armstrong , Loic Poulain , Jorge Ramirez-Ortiz , Mansur Alisha Shaik , Andy Gross , Rob Clark , Stephen Boyd , Yassine Oudjana , Pierre-Hugues Husson , Marc Gonzalez , cros-qcom-dts-watchers@chromium.org, Matthias Kaehlcke , Douglas Anderson , AngeloGioacchino Del Regno , Aniket Masule , Malathi Gottam , Rajendra Nayak , Jonathan Marek , Dikshita Agarwal , Renjiang Han Cc: Krzysztof Kozlowski , linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Bryan O'Donoghue , Mauro Carvalho Chehab , Konrad Dybcio , Krzysztof Kozlowski , stable@vger.kernel.org, Daniel J Blueman References: <5BXSXMNl656WiJPJAMmHvb3I2NzYMshRZuGuub3CxEXvdCUlIDKYbnv5jUq-pa6P1NibBLkO3njnKGxi7Al3jQ==@protonmail.internalid> <20260807-iris_iova_600mb_fix-v1-0-3996f67e33f9@oss.qualcomm.com> From: Bryan O'Donoghue Content-Language: en-GB Autocrypt: addr=bod@kernel.org; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 07/08/2026 09:24, Vikash Garodia wrote: > Qualcomm venus and iris VPUs reserve IOVA addresses below 0x25800000 > (600MB) for non-pixel stream ID in secure mode. When the kernel > allocates DMA mappings from this restricted range, the VPU generate > unhandled SMMU page faults, leading to video failures and, in some > cases, spontaneous system reboots. > > The issue is readily reproducible on affected platforms by running > multiple concurrent video decode workloads, such as opening several > browser tabs containing video streams. > > To prevent allocations in the restricted region, this series introduces > support for an IOMMU IOVA reserve memory-region in the Venus and Iris > bindings and updates all affected device trees to reserve the low IOVA > range [0, 0x25800000]. The memory-region is referenced by the video codec > node, allowing the IOMMU layer to keep DMA allocations above the reserved > boundary. > > The series consists of: > > * Binding updates for Venus and Iris schemas to permit an additional > memory-region phandle describing the IOVA reservation. > * DTS updates for all affected Venus platforms. > * DTS updates for all affected Iris platforms. > > This ensures that DMA allocations do not overlap restricted IOVA > mappings for non-pixel stream IDs and prevents the resulting SMMU > faults. LGTM For the series. Reviewed-by: Bryan O'Donoghue --- bod