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Tue, 8 Aug 2023 05:05:18 -0500 From: Vasant Hegde To: , CC: , , , , Vasant Hegde Subject: [PATCH 03/11] iommu/amd: Introduce per-device GCR3 table Date: Tue, 8 Aug 2023 10:02:24 +0000 Message-ID: <20230808100232.5977-4-vasant.hegde@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230808100232.5977-1-vasant.hegde@amd.com> References: <20230808100232.5977-1-vasant.hegde@amd.com> Precedence: bulk X-Mailing-List: iommu@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SA2PEPF00001508:EE_|DM6PR12MB4266:EE_ X-MS-Office365-Filtering-Correlation-Id: 23c8543f-5690-4c66-1b61-08db97f6fa03 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: AgRMztih5vrDTGxurfRLel98j+9V1038i/pIwlBdk2GbTxtncBNgqYauoD9jyYnz5OASWxFNRm5x8qwMSRm6GJGYfgTJKOLlp8u+TFYOsvBJHy8Cj5QuYBX76LNJcIA+0C1uM5E4KH2jJ44Z1SujYj9F4oqYWFdREE9dLs7tWBbi1XIA953ZN61WjacADWkbkP71u7qDl3HO6EhIylFfCaigFSIWbEJ8r5gBZ9eL6EGDFW246GY7yzojNkrq0xcw7YPN1RcDjgaG4PtfHnvjGyKhuBeL7zKDQ1f7Ak3OLydllB/t1Nhg4SCh99SbTvwE9AJZkSwfOZrNEMbkcbRQeuJjPAViRc+WKEiXzUKCjmtOM9agK65bgD4ovnL3YRTF7DRa8U4wgI23TVKTTf/E7Gk8mKZ6TZCDdtYsP6c5BQ/fkXa7YkhIW1GRah6UUoHicTD0RFXS8FrSv/hTnQwVC1zgl8+nlbQxbAKOPHVlsBZFRdk27bCXtCuqvzNAWl1FfvP4ivApJlg+/MoOTtqB3mClE7YMWQPIJ2ivyWuejIx1Rd5S3bYFmlHNq2W0L0rodFQeGIecxMZmC3/adQdik+OwidZGKdHQsd4PVomAP1vM7unXMb4LinTyDaPsOWHYdR4RzCImCURqzEYZx4wixvJkyYCRQZZvOxDrKsrX9UYJBx9erMZXzl/3HzRvtmovPp6YAgOrzED0706JklRfrBH3SRznbsI3l6TwmTUFDWhPDtYnSpWuQ+NhdACqUXRt+uxuDb09kGcDvlt/RO7chA== X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230028)(4636009)(136003)(376002)(39860400002)(396003)(346002)(82310400008)(186006)(451199021)(1800799003)(46966006)(36840700001)(40470700004)(40480700001)(2906002)(6666004)(7696005)(86362001)(316002)(36756003)(4326008)(110136005)(478600001)(54906003)(81166007)(2616005)(36860700001)(47076005)(426003)(26005)(336012)(82740400003)(356005)(40460700003)(44832011)(5660300002)(70586007)(16526019)(8676002)(70206006)(8936002)(41300700001)(1076003)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Aug 2023 10:05:21.4688 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 23c8543f-5690-4c66-1b61-08db97f6fa03 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: SA2PEPF00001508.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB4266 From: Suravee Suthikulpanit AMD IOMMU GCR3 table is indexed by PASID. Each entry stores guest CR3 register value, which is an address to the root of guest IO page table. The GCR3 table can be programmed per-device. However, Linux AMD IOMMU driver currently managing the table on a per-domain basis. PASID is a device feature. When SVA is enabled it will bind PASID to device, not domain. Hence it makes sense to have per device GCR3 table. Note that when system is booted with amd_iommu=pgtbl_v2, it will use PASID 0 for DMA translation. In this case all devices in the domain will continue to share same GCR3 table. Introduce struct iommu_dev_data.gcr3_tbl_info to keep track of GCR3 table configuration. This will eventually replaces gcr3 related variables in protection_domain structure. Suggested-by: Jason Gunthorpe Signed-off-by: Suravee Suthikulpanit Signed-off-by: Vasant Hegde --- drivers/iommu/amd/amd_iommu_types.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/iommu/amd/amd_iommu_types.h b/drivers/iommu/amd/amd_iommu_types.h index 5e89032b3dee..a275a4bbf8d0 100644 --- a/drivers/iommu/amd/amd_iommu_types.h +++ b/drivers/iommu/amd/amd_iommu_types.h @@ -547,6 +547,13 @@ struct amd_irte_ops; #define io_pgtable_cfg_to_data(x) \ container_of((x), struct amd_io_pgtable, pgtbl_cfg) +struct gcr3_tbl_info { + u64 *gcr3_tbl; /* Guest CR3 table */ + int glx; /* Number of levels for GCR3 table */ + int pasid_cnt; /* Track attached PASIDs */ + bool giov; /* GIOV bit support */ +}; + struct amd_io_pgtable { struct io_pgtable_cfg pgtbl_cfg; struct io_pgtable iop; @@ -825,6 +832,7 @@ struct iommu_dev_data { struct list_head list; /* For domain->dev_list */ struct llist_node dev_data_list; /* For global dev_data_list */ struct protection_domain *domain; /* Domain the device is bound to */ + struct gcr3_tbl_info gcr3_info; /* Per-device GCR3 table */ struct device *dev; u16 devid; /* PCI Device ID */ -- 2.31.1