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Tue, 23 Sep 2025 12:46:38 -0700 Received: from Asurada-Nvidia (10.127.8.11) by mail.nvidia.com (10.126.190.181) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.20 via Frontend Transport; Tue, 23 Sep 2025 12:46:35 -0700 Date: Tue, 23 Sep 2025 12:46:34 -0700 From: Nicolin Chen To: Jason Gunthorpe CC: "Tian, Kevin" , "joro@8bytes.org" , "bhelgaas@google.com" , "suravee.suthikulpanit@amd.com" , "will@kernel.org" , "robin.murphy@arm.com" , "sven@kernel.org" , "j@jannau.net" , "alyssa@rosenzweig.io" , "neal@gompa.dev" , "robin.clark@oss.qualcomm.com" , "m.szyprowski@samsung.com" , "krzk@kernel.org" , "alim.akhtar@samsung.com" , "dwmw2@infradead.org" , "baolu.lu@linux.intel.com" , "yong.wu@mediatek.com" , "matthias.bgg@gmail.com" , "angelogioacchino.delregno@collabora.com" , "tjeznach@rivosinc.com" , "paul.walmsley@sifive.com" , "palmer@dabbelt.com" , "aou@eecs.berkeley.edu" , "alex@ghiti.fr" , "heiko@sntech.de" , "schnelle@linux.ibm.com" , "mjrosato@linux.ibm.com" , "gerald.schaefer@linux.ibm.com" , "orsonzhai@gmail.com" , "baolin.wang@linux.alibaba.com" , "zhang.lyra@gmail.com" , "wens@csie.org" , "jernej.skrabec@gmail.com" , "samuel@sholland.org" , "jean-philippe@linaro.org" , "rafael@kernel.org" , "lenb@kernel.org" , "Liu, Yi L" , "cwabbott0@gmail.com" , "quic_pbrahma@quicinc.com" , "iommu@lists.linux.dev" , "linux-kernel@vger.kernel.org" , "asahi@lists.linux.dev" , "linux-arm-kernel@lists.infradead.org" , "linux-arm-msm@vger.kernel.org" , "linux-samsung-soc@vger.kernel.org" , "linux-mediatek@lists.infradead.org" , "linux-riscv@lists.infradead.org" , "linux-rockchip@lists.infradead.org" , "linux-s390@vger.kernel.org" , "linux-sunxi@lists.linux.dev" , "linux-tegra@vger.kernel.org" , "virtualization@lists.linux.dev" , "linux-acpi@vger.kernel.org" , "linux-pci@vger.kernel.org" , "patches@lists.linux.dev" , "Sethi, Vikram" , "helgaas@kernel.org" , "etzhao1900@gmail.com" Subject: Re: [PATCH v4 1/7] iommu/arm-smmu-v3: Add release_domain to attach prior to release_dev() Message-ID: References: <20250915123515.GE1024672@nvidia.com> <20250923172229.GD2608121@nvidia.com> <20250923174453.GF2608121@nvidia.com> Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; 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X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 Sep 2025 19:46:48.7849 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: d720f4e3-88f3-4300-9458-08ddfad9ef76 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.232];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: SA2PEPF000015C8.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR12MB6542 On Tue, Sep 23, 2025 at 02:44:53PM -0300, Jason Gunthorpe wrote: > On Tue, Sep 23, 2025 at 10:37:31AM -0700, Nicolin Chen wrote: > > On Tue, Sep 23, 2025 at 02:22:29PM -0300, Jason Gunthorpe wrote: > > > On Fri, Sep 19, 2025 at 03:47:49PM -0700, Nicolin Chen wrote: > > > > +/* Same as arm_smmu_blocked_ops but less set_dev_pasid */ > > > > +static const struct iommu_domain_ops arm_smmu_release_ops = { > > > > + .attach_dev = arm_smmu_attach_dev_blocked, > > > > +}; > > > > > > don't worry about set_dev_pasid for the release domain, it is never > > > called anyhow. > > > > > > The intention is to just use identity or blocked domains as is. > > > > Ah, I see AMD separate release_domain from blocked_domain.. > > Send a patch for AMD since you found it? Yea, sure. Nicolin