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Wed, 7 Oct 2026 18:29:53 -0700 Received: from nvidia.com (10.127.8.9) by mail.nvidia.com (10.129.68.7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.49 via Frontend Transport; Wed, 7 Oct 2026 18:29:51 -0700 Date: Wed, 7 Oct 2026 18:29:49 -0700 From: Nicolin Chen To: "Peng Fan (OSS)" CC: Will Deacon , Robin Murphy , "Joerg Roedel (AMD)" , Jean-Philippe Brucker , Jason Gunthorpe , Thierry Reding , Krishna Reddy , Jonathan Hunter , , , , , Peng Fan Subject: Re: [PATCH RFC v5 6/6] iommu/arm-smmu-v3: Wire up shared-SID STE ordering and feature gating Message-ID: References: <20261006-smmu-shared-sid-v5-0-169a59c671d3@nxp.com> <20261006-smmu-shared-sid-v5-6-169a59c671d3@nxp.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20261006-smmu-shared-sid-v5-6-169a59c671d3@nxp.com> X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: MWH0EPF000C618B:EE_|DS0PR12MB7777:EE_ X-MS-Office365-Filtering-Correlation-Id: 5142d6f0-5127-4eb8-1149-08df24dbafe5 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|36860700016|23010399003|7416014|376014|1800799024|10067099003|56012099006|11063799006|4143699003|18002099003|22082099003|13003099007; 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X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, Oct 06, 2026 at 08:19:12PM +0800, Peng Fan (OSS) wrote: > +static bool arm_smmu_is_shared_sid(struct arm_smmu_master *master) > +{ > + return !list_empty(&master->shared_masters_elm); > +} > + > +static bool arm_smmu_skip_shared_ste(struct arm_smmu_device *smmu, > + u32 sid, bool is_abort) > +{ > + struct arm_smmu_stream *stream; > + > + lockdep_assert_held(&smmu->streams_mutex); > + > + stream = arm_smmu_find_stream(smmu, sid); > + if (!stream || list_empty(&stream->shared_masters)) > + return false; > + > + if (is_abort) > + return true; > + if (stream->ste_installed) > + return true; > + stream->ste_installed = true; > + return false; There is some issue here; check sashiko report: https://sashiko.dev/#/patchset/20261006-smmu-shared-sid-v5-0-169a59c671d3%40nxp.com Nicolin