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Mon, 31 Aug 2026 17:34:17 -0700 From: Nicolin Chen To: , , CC: , , , , , , , , , , , , , , , Subject: [PATCH v3 11/13] PCI/ATS: Add PRI stubs Date: Mon, 31 Aug 2026 17:33:36 -0700 Message-ID: X-Mailer: git-send-email 2.43.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH1PEPF0000AD7C:EE_|PH0PR12MB8128:EE_ X-MS-Office365-Filtering-Correlation-Id: 171603f3-b48f-4d37-7f48-08df07c0cf6f X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|36860700016|23010399003|376014|1800799024|7416014|10067099003|6133799003|22082099003|18002099003|11063799006|56012099006|13003099007; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.117.160;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge1.nvidia.com;CAT:NONE;SFS:(13230040)(82310400026)(36860700016)(23010399003)(376014)(1800799024)(7416014)(10067099003)(6133799003)(22082099003)(18002099003)(11063799006)(56012099006)(13003099007);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: gHRvzxoF6etLpLgHohRE3cuDR+ZIsDh+VDzRQlzMSb6dsfAjuxS5XtCv6ZYtComVUjbPqtCJbFuqn5Ycm8mrZ5CyOJgTZdOIfcPH6yQjyYunnsY7Y2n3SsmFOtrU9/Hom+iCFKYa3LN3jJR+WFzuNj/fKkOmyZ81jcvLU3xY+rUb/KR/aKzN7sWjgv3HM/S1WW6JmlzZ1LRx+1BmGNiY+JPDMaOPsuk5CI12pf1Kiur9qY/UTLNTdIjHy0q1xpHSV+kdkjd0aDL610l0jATcGD+ONPaoY4Z9s7yEwH9CRJJFcjZs43aMFAIuCLcHs6gk7yfQn+BezivioNauRhL7yplPqZO+yr7sscQER9htNCOBxJkHC7LR4IZevXCIxFNzWMuUDnCvgyf1Yxzm3UHhL1Vs2hxkhovjo5qrKS5pMfRQeCxy0191Qbn5EL211Dtg X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 01 Sep 2026 00:34:40.3476 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 171603f3-b48f-4d37-7f48-08df07c0cf6f X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CH1PEPF0000AD7C.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH0PR12MB8128 From: Jean-Philippe Brucker The SMMUv3 driver, which may be built without CONFIG_PCI, will shortly gain PRI support. Partially revert commit c6e9aefbf9db ("PCI/ATS: Remove unused PRI and PASID stubs") to re-introduce the PRI stubs, avoiding more #ifdefs in the SMMU driver. Link: https://lore.kernel.org/iommu/20201112125519.3987595-8-jean-philippe@linaro.org/ Acked-by: Bjorn Helgaas Reviewed-by: Kuppuswamy Sathyanarayanan Signed-off-by: Jean-Philippe Brucker [nicolinc: drop stale APIs] Signed-off-by: Nicolin Chen --- include/linux/pci-ats.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/include/linux/pci-ats.h b/include/linux/pci-ats.h index f3723b6861294..07d24c1c3acdb 100644 --- a/include/linux/pci-ats.h +++ b/include/linux/pci-ats.h @@ -36,6 +36,11 @@ int pci_reset_pri(struct pci_dev *pdev); int pci_prg_resp_pasid_required(struct pci_dev *pdev); bool pci_pri_supported(struct pci_dev *pdev); #else +static inline int pci_enable_pri(struct pci_dev *pdev, u32 reqs) +{ return -ENODEV; } +static inline void pci_disable_pri(struct pci_dev *pdev) { } +static inline int pci_reset_pri(struct pci_dev *pdev) +{ return -ENODEV; } static inline bool pci_pri_supported(struct pci_dev *pdev) { return false; } #endif /* CONFIG_PCI_PRI */ -- 2.43.0