))
+			return -EOPNOTSUPP;
+		if (domain->dirty_ops)
+			return -EINVAL;
+		if (context_copied(iommu, info->bus, info->devfn))
+			return -EBUSY;
+	}
+	return paging_domain_compatible(domain, dev);
+}
+
 static int intel_iommu_attach_device(struct iommu_domain *domain,
 				     struct device *dev,
 				     struct iommu_domain *old)
@@ -3545,10 +3565,6 @@ static int intel_iommu_attach_device(struct iommu_domain *domain,
 
 	device_block_translation(dev);
 
-	ret = paging_domain_compatible(domain, dev);
-	if (ret)
-		return ret;
-
 	ret = iopf_for_domain_set(domain, dev);
 	if (ret)
 		return ret;
@@ -4151,22 +4167,6 @@ static int intel_iommu_set_dev_pasid(struct iommu_domain *domain,
 	struct dev_pasid_info *dev_pasid;
 	int ret;
 
-	if (WARN_ON_ONCE(!(domain->type & __IOMMU_DOMAIN_PAGING)))
-		return -EINVAL;
-
-	if (!pasid_supported(iommu) || dev_is_real_dma_subdevice(dev))
-		return -EOPNOTSUPP;
-
-	if (domain->dirty_ops)
-		return -EINVAL;
-
-	if (context_copied(iommu, info->bus, info->devfn))
-		return -EBUSY;
-
-	ret = paging_domain_compatible(domain, dev);
-	if (ret)
-		return ret;
-
 	dev_pasid = domain_add_dev_pasid(domain, dev, pasid);
 	if (IS_ERR(dev_pasid))
 		return PTR_ERR(dev_pasid);
@@ -4178,12 +4178,9 @@ static int intel_iommu_set_dev_pasid(struct iommu_domain *domain,
 	if (intel_domain_is_fs_paging(dmar_domain))
 		ret = domain_setup_first_level(iommu, dmar_domain,
 					       dev, pasid, old);
-	else if (intel_domain_is_ss_paging(dmar_domain))
+	else /* paging_domain_compatible() made sure it's ss_paging */
 		ret = domain_setup_second_level(iommu, dmar_domain,
 						dev, pasid, old);
-	else if (WARN_ON(true))
-		ret = -EINVAL;
-
 	if (ret)
 		goto out_unwind_iopf;
 
@@ -4403,6 +4400,21 @@ static int device_setup_pass_through(struct device *dev)
 				      context_setup_pass_through_cb, dev);
 }
 
+static int identity_domain_test_dev(struct iommu_domain *domain,
+				    struct device *dev, ioasid_t pasid,
+				    struct iommu_domain *old)
+{
+	if (pasid != IOMMU_NO_PASID) {
+		struct device_domain_info *info = dev_iommu_priv_get(dev);
+		struct intel_iommu *iommu = info->iommu;
+
+		if (!pasid_supported(iommu) || dev_is_real_dma_subdevice(dev))
+			return -EOPNOTSUPP;
+	}
+
+	return 0;
+}
+
 static int identity_domain_attach_dev(struct iommu_domain *domain,
 				      struct device *dev,
 				      struct iommu_domain *old)
@@ -4440,9 +4452,6 @@ static int identity_domain_set_dev_pasid(struct iommu_domain *domain,
 	struct intel_iommu *iommu = info->iommu;
 	int ret;
 
-	if (!pasid_supported(iommu) || dev_is_real_dma_subdevice(dev))
-		return -EOPNOTSUPP;
-
 	ret = iopf_for_domain_replace(domain, old, dev);
 	if (ret)
 		return ret;
@@ -4460,12 +4469,14 @@ static int identity_domain_set_dev_pasid(struct iommu_domain *domain,
 static struct iommu_domain identity_domain = {
 	.type = IOMMU_DOMAIN_IDENTITY,
 	.ops = &(const struct iommu_domain_ops) {
+		.test_dev	= identity_domain_test_dev,
 		.attach_dev	= identity_domain_attach_dev,
 		.set_dev_pasid	= identity_domain_set_dev_pasid,
 	},
 };
 
 const struct iommu_domain_ops intel_fs_paging_domain_ops = {
+	.test_dev = intel_iommu_test_device,
 	.attach_dev = intel_iommu_attach_device,
 	.set_dev_pasid = intel_iommu_set_dev_pasid,
 	.map_pages = intel_iommu_map_pages,
@@ -4479,6 +4490,7 @@ const struct iommu_domain_ops intel_fs_paging_domain_ops = {
 };
 
 const struct iommu_domain_ops intel_ss_paging_domain_ops = {
+	.test_dev = intel_iommu_test_device,
 	.attach_dev = intel_iommu_attach_device,
 	.set_dev_pasid = intel_iommu_set_dev_pasid,
 	.map_pages = intel_iommu_map_pages,
diff --git a/drivers/iommu/intel/nested.c b/drivers/iommu/intel/nested.c
index 760d7aa2ade84..708b8e653d5cd 100644
--- a/drivers/iommu/intel/nested.c
+++ b/drivers/iommu/intel/nested.c
@@ -18,19 +18,17 @@
 #include "iommu.h"
 #include "pasid.h"
 
-static int intel_nested_attach_dev(struct iommu_domain *domain,
-				   struct device *dev, struct iommu_domain *old)
+static int intel_nested_test_dev(struct iommu_domain *domain,
+				 struct device *dev, ioasid_t pasid,
+				 struct iommu_domain *old)
 {
 	struct device_domain_info *info = dev_iommu_priv_get(dev);
 	struct dmar_domain *dmar_domain = to_dmar_domain(domain);
 	struct intel_iommu *iommu = info->iommu;
-	unsigned long flags;
-	int ret = 0;
-
-	device_block_translation(dev);
+	int ret;
 
 	if (iommu->agaw < dmar_domain->s2_domain->agaw) {
-		dev_err_ratelimited(dev, "Adjusted guest address width not compatible\n");
+		dev_dbg_ratelimited(dev, "Adjusted guest address width not compatible\n");
 		return -ENODEV;
 	}
 
@@ -41,10 +39,24 @@ static int intel_nested_attach_dev(struct iommu_domain *domain,
 	 */
 	ret = paging_domain_compatible(&dmar_domain->s2_domain->domain, dev);
 	if (ret) {
-		dev_err_ratelimited(dev, "s2 domain is not compatible\n");
+		dev_dbg_ratelimited(dev, "s2 domain is not compatible\n");
 		return ret;
 	}
 
+	return 0;
+}
+
+static int intel_nested_attach_dev(struct iommu_domain *domain,
+				   struct device *dev, struct iommu_domain *old)
+{
+	struct device_domain_info *info = dev_iommu_priv_get(dev);
+	struct dmar_domain *dmar_domain = to_dmar_domain(domain);
+	struct intel_iommu *iommu = info->iommu;
+	unsigned long flags;
+	int ret = 0;
+
+	device_block_translation(dev);
+
 	ret = domain_attach_iommu(dmar_domain, iommu);
 	if (ret) {
 		dev_err_ratelimited(dev, "Failed to attach domain to iommu\n");
@@ -192,6 +204,7 @@ static int intel_nested_set_dev_pasid(struct iommu_domain *domain,
 }
 
 static const struct iommu_domain_ops intel_nested_domain_ops = {
+	.test_dev		= intel_nested_test_dev,
 	.attach_dev		= intel_nested_attach_dev,
 	.set_dev_pasid		= intel_nested_set_dev_pasid,
 	.free			= intel_nested_domain_free,
diff --git a/drivers/iommu/intel/svm.c b/drivers/iommu/intel/svm.c
index e147f71f91b72..5901caa4ceebc 100644
--- a/drivers/iommu/intel/svm.c
+++ b/drivers/iommu/intel/svm.c
@@ -145,6 +145,12 @@ static int intel_iommu_sva_supported(struct device *dev)
 	return 0;
 }
 
+static int intel_svm_test_dev(struct iommu_domain *domain, struct device *dev,
+			      ioasid_t pasid, struct iommu_domain *old)
+{
+	return intel_iommu_sva_supported(dev);
+}
+
 static int intel_svm_set_dev_pasid(struct iommu_domain *domain,
 				   struct device *dev, ioasid_t pasid,
 				   struct iommu_domain *old)
@@ -156,10 +162,6 @@ static int intel_svm_set_dev_pasid(struct iommu_domain *domain,
 	unsigned long sflags;
 	int ret = 0;
 
-	ret = intel_iommu_sva_supported(dev);
-	if (ret)
-		return ret;
-
 	dev_pasid = domain_add_dev_pasid(domain, dev, pasid);
 	if (IS_ERR(dev_pasid))
 		return PTR_ERR(dev_pasid);
@@ -195,6 +197,7 @@ static void intel_svm_domain_free(struct iommu_domain *domain)
 }
 
 static const struct iommu_domain_ops intel_svm_domain_ops = {
+	.test_dev		= intel_svm_test_dev,
 	.set_dev_pasid		= intel_svm_set_dev_pasid,
 	.free			= intel_svm_domain_free
 };
-- 
2.43.0[PATCH v1 04/20] iommu/intel: Implement test_dev callbacks to domain opsNicolin Chen <nicolinc@nvidia.com> undefined<joro@8bytes.org>, <jgg@nvidia.com>, <kevin.tian@intel.com> undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined°+ƒ-