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Sun, 12 Oct 2025 17:05:47 -0700 From: Nicolin Chen To: , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v1 08/20] iommu/riscv: Implement riscv_iommu_test_paging_domain Date: Sun, 12 Oct 2025 17:05:05 -0700 Message-ID: <77e60e630435ed5fcd755a09126c0bc2e85bf1ff.1760312725.git.nicolinc@nvidia.com> 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: quoted-printable X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY4PEPF0000EE3E:EE_|SA1PR12MB9003:EE_ X-MS-Office365-Filtering-Correlation-Id: 7becf227-8728-4d92-6f71-08de09ec50f7 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|36860700013|376014|7416014|82310400026; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?Qy2XFjOA+tR7kH9q/IARx/fpOo5BzZzfC8gz7gKRUi7to5qhWxKy8TC4HJLj?= =?us-ascii?Q?Z10hdLpj//GUw839wvaaSTtKCDk9xDjxsfPp/ZMPsl0hUbqq6SY993QN9hLA?= =?us-ascii?Q?ns70C028lh9s5msfHMzRyBWbSLWtJcbTp3n/28kGuZGcOYTLZAP+ZW5WfCSS?= =?us-ascii?Q?2KxlhyB/izxLLLrjB0hlxqHZMG1Bas9+FV7jUDaM8GOeysPkSpEADw+bVLiq?= =?us-ascii?Q?WX4CppyEYuoJiXnZjM2kbugV98+HulyS2Vk4uRLnPKikWvWUUAUsuwAvZ9kc?= =?us-ascii?Q?gDTg79YfVVhGgUPpwq1SlxWIC2CcLteLY0IGf0z6hgwLU/yPyN7nqFN1r03x?= =?us-ascii?Q?7S5t0qjnh7yDnipJCr1ZCGw2EPuvRjI9apUd8L+lq7Mt1qPEk+5e097ou2tO?= =?us-ascii?Q?zVP56mc6EIryboW3j0JgAZpGuQvoA//NOFq3lCI/xlKPJy+9et4FFWoWJKnI?= =?us-ascii?Q?jhzFety5ynp40rnG6Wu0KUiSWAzuUCtCPr7ahUfCfm7pT8Uaw4PzX+dLKW5K?= =?us-ascii?Q?fkFzLIBly0MFNNsWMjtsaQRNIoiM3ZbkVidxYnU2ArEXB4CULD1psN6Oj4ke?= =?us-ascii?Q?kBn9l0ydapILg0zXQobSdE0+cE+zkS0iuqJ7NSquFasdAVwRJKKSTuFrXw0P?= =?us-ascii?Q?AisuQt3AQ/cjL4TZT7Uf7YHbWz/jd3WUtfaRPfcAaFpN+PdEsWrz/M5rT0E+?= =?us-ascii?Q?lJl+EMG/VoGLTQBi6gIYpbIOgPZvnhZL7rm7+6qglHZC3FpD4Ha/aKyF8RUn?= =?us-ascii?Q?a/aS+fZULeSAQDZ0anyikE1V6Sbb4N5ABdizBUehbWmeIdoOTdUz7YzSgIMm?= =?us-ascii?Q?A3OyMYS+nvYemcP+IW38bc1dLVYiJlj+roISRSgaFVkqa62EWgnXpcpIXPtD?= =?us-ascii?Q?fdCtqYdiAHoCXUuSVwZV7q2i97ueX1cV9VXAVBXYZ2huPfa7sXDSbvoB+AjO?= =?us-ascii?Q?6P4If/qK7ZC0WUF4xxomBwAJ1ihzDfrHrkw/DlQ2GVotUm3EpDZZT1blCkOd?= =?us-ascii?Q?5V7IM225mThz7VdvkbVbbbmstamz3GxN0fo5L5j1CS4tlzwJZFu9hA9aral6?= =?us-ascii?Q?aTtJ7jmwHrc3nfzIQHBNcAcBzFhIhlg5MZ8aqNuH70tHozhjYmF/YXCzgqW+?= =?us-ascii?Q?iydzUQfuMC/lP9Zs+wblNCItIVc5OponzYe0B73wxVtIl/l7VyWAPxst5pVX?= =?us-ascii?Q?OFjblK3Io7CQb9bPkhScJ6ZUvqAfcXqOrXw2zKBPi4rQv2pOfQx3N3PlcAKw?= =?us-ascii?Q?DooKZkZN+o7levvMqTlXxEJQrfj13J10HPWuC6ZbBErqXzRDW0oabcRdo9fJ?= =?us-ascii?Q?HnbhyZvNuQ4t9YVt5TYNMOc1VDIEs0JpTUFgvBioljibg4jX/4skQSwEGxF6?= =?us-ascii?Q?q5nA7w8iMF+/casIjbo+lTOm1JX0Qhppi9MfdTDgG5yyNRWvFEeFTIw4ugx9?= =?us-ascii?Q?ca8DoEPFHtyH70Bb+zwu63Dl3K7kuZ3AqUkQbEVnKd3/t99/3JIXFxDwzL+o?= =?us-ascii?Q?ml8umwXZ6v+JebeSHrxcx3cc0Oo18VRnBHXjkyJUeakokHmIbDMup2pHLrnG?= =?us-ascii?Q?j4q+1SdyFvRHRNlv+gg=3D?= 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)(1800799024)(36860700013)(376014)(7416014)(82310400026);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Oct 2025 00:06:10.7766 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 7becf227-8728-4d92-6f71-08de09ec50f7 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: CY4PEPF0000EE3E.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA1PR12MB9003 Content-Type: text/plain; charset="utf-8" Move sanity and compatibility tests from the attach_dev callback to the new test_dev callback function. The IOMMU core makes sure an attach_dev call must be invoked after a successful test_dev call. Signed-off-by: Nicolin Chen --- drivers/iommu/riscv/iommu.c | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-) diff --git a/drivers/iommu/riscv/iommu.c b/drivers/iommu/riscv/iommu.c index d9429097a2b51..6613ece2c9f41 100644 --- a/drivers/iommu/riscv/iommu.c +++ b/drivers/iommu/riscv/iommu.c @@ -1320,6 +1320,18 @@ static bool riscv_iommu_pt_supported(struct riscv_io= mmu_device *iommu, int pgd_m return false; } =20 +static int riscv_iommu_test_paging_domain(struct iommu_domain *iommu_domai= n, + struct device *dev, ioasid_t pasid, + struct iommu_domain *old) +{ + struct riscv_iommu_domain *domain =3D iommu_domain_to_riscv(iommu_domain); + struct riscv_iommu_device *iommu =3D dev_to_iommu(dev); + + if (!riscv_iommu_pt_supported(iommu, domain->pgd_mode)) + return -ENODEV; + return 0; +} + static int riscv_iommu_attach_paging_domain(struct iommu_domain *iommu_dom= ain, struct device *dev, struct iommu_domain *old) @@ -1329,9 +1341,6 @@ static int riscv_iommu_attach_paging_domain(struct io= mmu_domain *iommu_domain, struct riscv_iommu_info *info =3D dev_iommu_priv_get(dev); u64 fsc, ta; =20 - if (!riscv_iommu_pt_supported(iommu, domain->pgd_mode)) - return -ENODEV; - fsc =3D FIELD_PREP(RISCV_IOMMU_PC_FSC_MODE, domain->pgd_mode) | FIELD_PREP(RISCV_IOMMU_PC_FSC_PPN, virt_to_pfn(domain->pgd_root)); ta =3D FIELD_PREP(RISCV_IOMMU_PC_TA_PSCID, domain->pscid) | @@ -1348,6 +1357,7 @@ static int riscv_iommu_attach_paging_domain(struct io= mmu_domain *iommu_domain, } =20 static const struct iommu_domain_ops riscv_iommu_paging_domain_ops =3D { + .test_dev =3D riscv_iommu_test_paging_domain, .attach_dev =3D riscv_iommu_attach_paging_domain, .free =3D riscv_iommu_free_paging_domain, .map_pages =3D riscv_iommu_map_pages, --=20 2.43.0