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Fri, 25 Oct 2024 16:50:57 -0700 From: Nicolin Chen To: , , CC: , , , , , , , , , , , , , , , , , , , Subject: [PATCH v5 08/13] iommufd/selftest: Add mock_viommu_cache_invalidate Date: Fri, 25 Oct 2024 16:50:37 -0700 Message-ID: <6ecee6aff136af1a1b8c13adb0210a74c1974ee7.1729897278.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: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ1PEPF000023D2:EE_|DS7PR12MB8084:EE_ X-MS-Office365-Filtering-Correlation-Id: d4f9598c-bf60-4542-abf6-08dcf54fe4b2 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; ARA:13230040|36860700013|7416014|376014|1800799024|82310400026; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.118.232; CTRY:US; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:mail.nvidia.com; PTR:dc7edge1.nvidia.com; CAT:NONE; SFS:(13230040)(36860700013)(7416014)(376014)(1800799024)(82310400026); DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 25 Oct 2024 23:51:06.7747 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: d4f9598c-bf60-4542-abf6-08dcf54fe4b2 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: SJ1PEPF000023D2.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS7PR12MB8084 Similar to the coverage of cache_invalidate_user for iotlb invalidation, add a device cache and a viommu_cache_invalidate function to test it out. Signed-off-by: Nicolin Chen Reviewed-by: Kevin Tian --- drivers/iommu/iommufd/iommufd_test.h | 25 +++++++++ drivers/iommu/iommufd/selftest.c | 76 +++++++++++++++++++++++++++- 2 files changed, 100 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/iommufd/iommufd_test.h b/drivers/iommu/iommufd/iommufd_test.h index edced4ac7cd3..46558f83e734 100644 --- a/drivers/iommu/iommufd/iommufd_test.h +++ b/drivers/iommu/iommufd/iommufd_test.h @@ -54,6 +54,11 @@ enum { MOCK_NESTED_DOMAIN_IOTLB_NUM = 4, }; +enum { + MOCK_DEV_CACHE_ID_MAX = 3, + MOCK_DEV_CACHE_NUM = 4, +}; + struct iommu_test_cmd { __u32 size; __u32 op; @@ -152,6 +157,7 @@ struct iommu_test_hw_info { /* Should not be equal to any defined value in enum iommu_hwpt_data_type */ #define IOMMU_HWPT_DATA_SELFTEST 0xdead #define IOMMU_TEST_IOTLB_DEFAULT 0xbadbeef +#define IOMMU_TEST_DEV_CACHE_DEFAULT 0xbaddad /** * struct iommu_hwpt_selftest @@ -182,4 +188,23 @@ struct iommu_hwpt_invalidate_selftest { #define IOMMU_VIOMMU_TYPE_SELFTEST 0xdeadbeef +/* Should not be equal to any defined value in enum iommu_viommu_invalidate_data_type */ +#define IOMMU_VIOMMU_INVALIDATE_DATA_SELFTEST 0xdeadbeef +#define IOMMU_VIOMMU_INVALIDATE_DATA_SELFTEST_INVALID 0xdadbeef + +/** + * struct iommu_viommu_invalidate_selftest - Invalidation data for Mock VIOMMU + * (IOMMU_VIOMMU_INVALIDATE_DATA_SELFTEST) + * @flags: Invalidate flags + * @cache_id: Invalidate cache entry index + * + * If IOMMU_TEST_INVALIDATE_ALL is set in @flags, @cache_id will be ignored + */ +struct iommu_viommu_invalidate_selftest { +#define IOMMU_TEST_INVALIDATE_FLAG_ALL (1 << 0) + __u32 flags; + __u32 vdev_id; + __u32 cache_id; +}; + #endif diff --git a/drivers/iommu/iommufd/selftest.c b/drivers/iommu/iommufd/selftest.c index 33a0fcc0eff7..01556854f2f2 100644 --- a/drivers/iommu/iommufd/selftest.c +++ b/drivers/iommu/iommufd/selftest.c @@ -163,6 +163,7 @@ struct mock_dev { struct device dev; unsigned long flags; int id; + u32 cache[MOCK_DEV_CACHE_NUM]; }; static inline struct mock_dev *to_mock_dev(struct device *dev) @@ -606,9 +607,80 @@ mock_viommu_alloc_domain_nested(struct iommufd_viommu *viommu, return &mock_nested->domain; } +static int mock_viommu_cache_invalidate(struct iommufd_viommu *viommu, + struct iommu_user_data_array *array) +{ + struct iommu_viommu_invalidate_selftest *cmds; + struct iommu_viommu_invalidate_selftest *cur; + struct iommu_viommu_invalidate_selftest *end; + int rc; + + /* A zero-length array is allowed to validate the array type */ + if (array->entry_num == 0 && + array->type == IOMMU_VIOMMU_INVALIDATE_DATA_SELFTEST) { + array->entry_num = 0; + return 0; + } + + cmds = kcalloc(array->entry_num, sizeof(*cmds), GFP_KERNEL); + if (!cmds) + return -ENOMEM; + cur = cmds; + end = cmds + array->entry_num; + + static_assert(sizeof(*cmds) == 3 * sizeof(u32)); + rc = iommu_copy_struct_from_full_user_array( + cmds, sizeof(*cmds), array, + IOMMU_VIOMMU_INVALIDATE_DATA_SELFTEST); + if (rc) + goto out; + + while (cur != end) { + struct mock_dev *mdev; + struct device *dev; + int i; + + if (cur->flags & ~IOMMU_TEST_INVALIDATE_FLAG_ALL) { + rc = -EOPNOTSUPP; + goto out; + } + + if (cur->cache_id > MOCK_DEV_CACHE_ID_MAX) { + rc = -EINVAL; + goto out; + } + + xa_lock(&viommu->vdevs); + dev = iommufd_viommu_find_dev(viommu, + (unsigned long)cur->vdev_id); + if (!dev) { + xa_unlock(&viommu->vdevs); + rc = -EINVAL; + goto out; + } + mdev = container_of(dev, struct mock_dev, dev); + + if (cur->flags & IOMMU_TEST_INVALIDATE_FLAG_ALL) { + /* Invalidate all cache entries and ignore cache_id */ + for (i = 0; i < MOCK_DEV_CACHE_NUM; i++) + mdev->cache[i] = 0; + } else { + mdev->cache[cur->cache_id] = 0; + } + xa_unlock(&viommu->vdevs); + + cur++; + } +out: + array->entry_num = cur - cmds; + kfree(cmds); + return rc; +} + static struct iommufd_viommu_ops mock_viommu_ops = { .free = mock_viommu_free, .alloc_domain_nested = mock_viommu_alloc_domain_nested, + .cache_invalidate = mock_viommu_cache_invalidate, }; static struct iommufd_viommu *mock_viommu_alloc(struct device *dev, @@ -779,7 +851,7 @@ static void mock_dev_release(struct device *dev) static struct mock_dev *mock_dev_create(unsigned long dev_flags) { struct mock_dev *mdev; - int rc; + int rc, i; if (dev_flags & ~(MOCK_FLAGS_DEVICE_NO_DIRTY | MOCK_FLAGS_DEVICE_HUGE_IOVA)) @@ -793,6 +865,8 @@ static struct mock_dev *mock_dev_create(unsigned long dev_flags) mdev->flags = dev_flags; mdev->dev.release = mock_dev_release; mdev->dev.bus = &iommufd_mock_bus_type.bus; + for (i = 0; i < MOCK_DEV_CACHE_NUM; i++) + mdev->cache[i] = IOMMU_TEST_DEV_CACHE_DEFAULT; rc = ida_alloc(&mock_dev_ida, GFP_KERNEL); if (rc < 0)