[RFC 4/8] iommufd/selftest: Add set_dev_pasid and remove_dev_pasid in mock iommu

[Yi Liu]

The two callbacks are needed to make pasid_attach/detach path complete for
mock device. A nop is enough for set_dev_pasid, a domain type check in the
remove_dev_pasid is also helpful.

Signed-off-by: Yi Liu <yi.l.liu@xxxxxxxxx>
---
 drivers/iommu/iommufd/selftest.c | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/drivers/iommu/iommufd/selftest.c b/drivers/iommu/iommufd/selftest.c
index 117776d236dc..200c88387cd1 100644
--- a/drivers/iommu/iommufd/selftest.c
+++ b/drivers/iommu/iommufd/selftest.c
@@ -431,6 +431,31 @@ static void mock_domain_unset_dev_user_data(struct device *dev)
 	mdev->dev_data = 0;
 }
 
+static void mock_iommu_remove_dev_pasid(struct device *dev, ioasid_t pasid)
+{
+	struct iommu_domain *domain;
+
+	/* Domain type specific cleanup: */
+	domain = iommu_get_domain_for_dev_pasid(dev, pasid, 0);
+	if (domain) {
+		switch (domain->type) {
+		case IOMMU_DOMAIN_NESTED:
+		case IOMMU_DOMAIN_UNMANAGED:
+			break;
+		default:
+			/* should never reach here */
+			WARN_ON(1);
+			break;
+		}
+	}
+}
+
+static int mock_domain_set_dev_pasid_nop(struct iommu_domain *domain,
+					 struct device *dev, ioasid_t pasid)
+{
+	return 0;
+}
+
 static const struct iommu_ops mock_ops = {
 	.owner = THIS_MODULE,
 	.pgsize_bitmap = MOCK_IO_PAGE_SIZE,
@@ -443,6 +468,7 @@ static const struct iommu_ops mock_ops = {
 	.probe_device = mock_probe_device,
 	.set_dev_user_data = mock_domain_set_dev_user_data,
 	.unset_dev_user_data = mock_domain_unset_dev_user_data,
+	.remove_dev_pasid = mock_iommu_remove_dev_pasid,
 	.default_domain_ops =
 		&(struct iommu_domain_ops){
 			.free = mock_domain_free,
@@ -450,6 +476,7 @@ 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,
+			.set_dev_pasid = mock_domain_set_dev_pasid_nop,
 		},
 };
 
@@ -500,6 +527,7 @@ static struct iommu_domain_ops domain_nested_ops = {
 	.free = mock_domain_free,
 	.attach_dev = mock_domain_nop_attach,
 	.cache_invalidate_user = mock_domain_cache_invalidate_user,
+	.set_dev_pasid = mock_domain_set_dev_pasid_nop,
 };
 
 static inline struct iommufd_hw_pagetable *
-- 
2.34.1