Similar to the coverage of cache_invalidate_user for iotlb invalidation, add a device cache and an invalidation op to test IOMMU_VIOMMU_INVALIDATE ioctl.
Signed-off-by: Nicolin Chen nicolinc@nvidia.com --- drivers/iommu/iommufd/iommufd_test.h | 25 +++++++++++ drivers/iommu/iommufd/selftest.c | 63 +++++++++++++++++++++++++++- 2 files changed, 87 insertions(+), 1 deletion(-)
diff --git a/drivers/iommu/iommufd/iommufd_test.h b/drivers/iommu/iommufd/iommufd_test.h index 0bb30275a92f..da824b58927f 100644 --- a/drivers/iommu/iommufd/iommufd_test.h +++ b/drivers/iommu/iommufd/iommufd_test.h @@ -55,6 +55,11 @@ 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; @@ -156,6 +161,7 @@ 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 @@ -184,4 +190,23 @@ struct iommu_hwpt_invalidate_selftest { __u32 iotlb_id; };
+/* 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 a165b162c88f..4858c74c67be 100644 --- a/drivers/iommu/iommufd/selftest.c +++ b/drivers/iommu/iommufd/selftest.c @@ -141,6 +141,7 @@ struct mock_dev { struct device dev; unsigned long flags; int id; + u32 cache[MOCK_DEV_CACHE_NUM]; };
struct selftest_obj { @@ -560,6 +561,61 @@ static void mock_dev_get_resv_regions(struct device *dev, iommu_dma_get_resv_regions(dev, head); }
+static int mock_viommu_cache_invalidate(struct iommufd_viommu *viommu, + struct iommu_user_data_array *array) +{ + struct iommu_viommu_invalidate_selftest inv; + u32 processed = 0; + int i = 0, j; + int rc = 0; + + if (array->type != IOMMU_VIOMMU_INVALIDATE_DATA_SELFTEST) { + rc = -EINVAL; + goto out; + } + + for ( ; i < array->entry_num; i++) { + struct mock_dev *mdev; + struct device *dev; + + rc = iommu_copy_struct_from_user_array(&inv, array, + IOMMU_VIOMMU_INVALIDATE_DATA_SELFTEST, i, cache_id); + if (rc) + break; + + if (inv.flags & ~IOMMU_TEST_INVALIDATE_FLAG_ALL) { + rc = -EOPNOTSUPP; + break; + } + + if (inv.cache_id > MOCK_DEV_CACHE_ID_MAX) { + rc = -EINVAL; + break; + } + + dev = iommufd_viommu_find_device(viommu, inv.vdev_id); + if (!dev) { + rc = -EINVAL; + break; + } + mdev = container_of(dev, struct mock_dev, dev); + + if (inv.flags & IOMMU_TEST_INVALIDATE_FLAG_ALL) { + /* Invalidate all cache entries and ignore cache_id */ + for (j = 0; j < MOCK_DEV_CACHE_NUM; j++) + mdev->cache[j] = 0; + } else { + mdev->cache[inv.cache_id] = 0; + } + + processed++; + } + +out: + array->entry_num = processed; + return rc; +} + static const struct iommu_ops mock_ops = { /* * IOMMU_DOMAIN_BLOCKED cannot be returned from def_domain_type() @@ -587,6 +643,9 @@ static const struct iommu_ops mock_ops = { .map_pages = mock_domain_map_pages, .unmap_pages = mock_domain_unmap_pages, .iova_to_phys = mock_domain_iova_to_phys, + .default_viommu_ops = &(struct iommufd_viommu_ops){ + .cache_invalidate = mock_viommu_cache_invalidate, + }, }, };
@@ -722,7 +781,7 @@ 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)) @@ -737,6 +796,8 @@ 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)