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Sat, 8 Feb 2025 01:03:20 -0800 From: Nicolin Chen To: , , , CC: , , , , , , , , , , , , , Subject: [PATCH v1 12/13] iommufd/selftest: Add a testing reserved region Date: Sat, 8 Feb 2025 01:02:45 -0800 Message-ID: <4882654aa73b39756393b12d7455626a3837b52c.1739005085.git.nicolinc@nvidia.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-NV-OnPremToCloud: AnonymousSubmission X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN1PEPF00004689:EE_|DM4PR12MB5913:EE_ X-MS-Office365-Filtering-Correlation-Id: 9a55aee9-389b-4649-d597-08dd481f793d X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; ARA:13230040|376014|7416014|36860700013|82310400026|1800799024; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.117.161; CTRY:US; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:mail.nvidia.com; PTR:dc6edge2.nvidia.com; CAT:NONE; SFS:(13230040)(376014)(7416014)(36860700013)(82310400026)(1800799024); DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Feb 2025 09:03:36.9728 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 9a55aee9-389b-4649-d597-08dd481f793d X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a; Ip=[216.228.117.161]; Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN1PEPF00004689.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR12MB5913 The new IOMMU_OPTION_SW_MSI_START/SIZE must not overlap with any existing device reserved region, so add a testing region [0x80000000, 0x8fffffff], on top of the normal IOVA aperture for selftest program to run an overlap test. Signed-off-by: Nicolin Chen --- drivers/iommu/iommufd/iommufd_test.h | 3 +++ drivers/iommu/iommufd/selftest.c | 19 ++++++++++++++++++- 2 files changed, 21 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/iommufd/iommufd_test.h b/drivers/iommu/iommufd/iommufd_test.h index 02be242f8f34..53e2e30570fc 100644 --- a/drivers/iommu/iommufd/iommufd_test.h +++ b/drivers/iommu/iommufd/iommufd_test.h @@ -213,4 +213,7 @@ struct iommu_viommu_invalidate_selftest { __u32 cache_id; }; +#define IOMMU_TEST_RESV_BASE 0x80000000UL +#define IOMMU_TEST_RESV_LENGTH 0x10000000UL + #endif diff --git a/drivers/iommu/iommufd/selftest.c b/drivers/iommu/iommufd/selftest.c index 37a5cb89e27c..f4ac443d73d6 100644 --- a/drivers/iommu/iommufd/selftest.c +++ b/drivers/iommu/iommufd/selftest.c @@ -13,6 +13,7 @@ #include #include +#include "../dma-iommu.h" #include "../iommu-priv.h" #include "io_pagetable.h" #include "iommufd_private.h" @@ -379,7 +380,8 @@ mock_domain_alloc_paging_flags(struct device *dev, u32 flags, if (!mock) return ERR_PTR(-ENOMEM); mock->domain.geometry.aperture_start = MOCK_APERTURE_START; - mock->domain.geometry.aperture_end = MOCK_APERTURE_LAST; + mock->domain.geometry.aperture_end = + MOCK_APERTURE_LAST + IOMMU_TEST_RESV_LENGTH; mock->domain.pgsize_bitmap = MOCK_IO_PAGE_SIZE; if (dev && mdev->flags & MOCK_FLAGS_DEVICE_HUGE_IOVA) mock->domain.pgsize_bitmap |= MOCK_HUGE_PAGE_SIZE; @@ -567,6 +569,20 @@ static int mock_dev_disable_feat(struct device *dev, enum iommu_dev_features fea return 0; } +static void mock_dev_get_resv_regions(struct device *dev, + struct list_head *head) +{ + const int prot = IOMMU_WRITE | IOMMU_NOEXEC | IOMMU_MMIO; + struct iommu_resv_region *region; + + region = iommu_alloc_resv_region(IOMMU_TEST_RESV_BASE, + IOMMU_TEST_RESV_LENGTH, prot, + IOMMU_RESV_RESERVED, GFP_KERNEL); + if (!region) + return; + list_add_tail(®ion->list, head); +} + static void mock_viommu_destroy(struct iommufd_viommu *viommu) { struct mock_iommu_device *mock_iommu = container_of( @@ -711,6 +727,7 @@ static const struct iommu_ops mock_ops = { .page_response = mock_domain_page_response, .dev_enable_feat = mock_dev_enable_feat, .dev_disable_feat = mock_dev_disable_feat, + .get_resv_regions = mock_dev_get_resv_regions, .user_pasid_table = true, .viommu_alloc = mock_viommu_alloc, .default_domain_ops =