diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 7e465dde9d3c645f5e8b02a99f885e497205e694..ed8d987551c6cb3ac158ff2ec42cfb1bb1ebbc94 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -1578,6 +1578,51 @@ int iommu_sva_invalidate(struct iommu_domain *domain,
 }
 EXPORT_SYMBOL_GPL(iommu_sva_invalidate);
 
+int iommu_page_response(struct device *dev,
+			struct page_response_msg *msg)
+{
+	struct iommu_param *param = dev->iommu_param;
+	int ret = -EINVAL;
+	struct iommu_fault_event *evt, *iter;
+	struct iommu_domain *domain = iommu_get_domain_for_dev(dev);
+
+	if (!domain || !domain->ops->page_response)
+		return -ENODEV;
+
+	/*
+	 * Device iommu_param should have been allocated when device is
+	 * added to its iommu_group.
+	 */
+	if (!param || !param->fault_param)
+		return -EINVAL;
+
+	/* Only send response if there is a fault report pending */
+	mutex_lock(&param->fault_param->lock);
+	if (list_empty(&param->fault_param->faults)) {
+		pr_warn("no pending PRQ, drop response\n");
+		goto done_unlock;
+	}
+	/*
+	 * Check if we have a matching page request pending to respond,
+	 * otherwise return -EINVAL
+	 */
+	list_for_each_entry_safe(evt, iter, &param->fault_param->faults, list) {
+		if (evt->pasid == msg->pasid &&
+		    msg->page_req_group_id == evt->page_req_group_id) {
+			msg->private_data = evt->iommu_private;
+			ret = domain->ops->page_response(dev, msg);
+			list_del(&evt->list);
+			kfree(evt);
+			break;
+		}
+	}
+
+done_unlock:
+	mutex_unlock(&param->fault_param->lock);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(iommu_page_response);
+
 static void __iommu_detach_device(struct iommu_domain *domain,
 				  struct device *dev)
 {
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 7a25981570ccbbe09ad739d15e2868f930673bd1..3fa45d2928131f12604a9680acd002476eaebec4 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -163,6 +163,55 @@ struct iommu_resv_region {
 
 #ifdef CONFIG_IOMMU_API
 
+/**
+ * enum page_response_code - Return status of fault handlers, telling the IOMMU
+ * driver how to proceed with the fault.
+ *
+ * @IOMMU_FAULT_STATUS_SUCCESS: Fault has been handled and the page tables
+ *	populated, retry the access. This is "Success" in PCI PRI.
+ * @IOMMU_FAULT_STATUS_FAILURE: General error. Drop all subsequent faults from
+ *	this device if possible. This is "Response Failure" in PCI PRI.
+ * @IOMMU_FAULT_STATUS_INVALID: Could not handle this fault, don't retry the
+ *	access. This is "Invalid Request" in PCI PRI.
+ */
+enum page_response_code {
+	IOMMU_PAGE_RESP_SUCCESS = 0,
+	IOMMU_PAGE_RESP_INVALID,
+	IOMMU_PAGE_RESP_FAILURE,
+};
+
+/**
+ * enum page_request_handle_t - Return page request/response handler status
+ *
+ * @IOMMU_FAULT_STATUS_HANDLED: Stop processing the fault, and do not send a
+ *	reply to the device.
+ * @IOMMU_FAULT_STATUS_CONTINUE: Fault was not handled. Call the next handler,
+ *	or terminate.
+ */
+enum page_request_handle_t {
+	IOMMU_PAGE_RESP_HANDLED = 0,
+	IOMMU_PAGE_RESP_CONTINUE,
+};
+
+/**
+ * Generic page response information based on PCI ATS and PASID spec.
+ * @addr: servicing page address
+ * @pasid: contains process address space ID
+ * @resp_code: response code
+ * @page_req_group_id: page request group index
+ * @type: group or stream/single page response
+ * @private_data: uniquely identify device-specific private data for an
+ *                individual page response
+ */
+struct page_response_msg {
+	u64 addr;
+	u32 pasid;
+	enum page_response_code resp_code;
+	u32 pasid_present:1;
+	u32 page_req_group_id;
+	u64 private_data;
+};
+
 /**
  * struct iommu_ops - iommu ops and capabilities
  * @capable: check capability
@@ -194,6 +243,7 @@ struct iommu_resv_region {
  * @bind_pasid_table: bind pasid table pointer for guest SVM
  * @unbind_pasid_table: unbind pasid table pointer and restore defaults
  * @sva_invalidate: invalidate translation caches of shared virtual address
+ * @page_response: handle page request response
  */
 struct iommu_ops {
 	bool (*capable)(enum iommu_cap);
@@ -247,6 +297,7 @@ struct iommu_ops {
 				struct device *dev);
 	int (*sva_invalidate)(struct iommu_domain *domain,
 		struct device *dev, struct tlb_invalidate_info *inv_info);
+	int (*page_response)(struct device *dev, struct page_response_msg *msg);
 
 	unsigned long pgsize_bitmap;
 };
@@ -469,6 +520,8 @@ extern int iommu_unregister_device_fault_handler(struct device *dev);
 extern int iommu_report_device_fault(struct device *dev,
 				     struct iommu_fault_event *evt);
 
+extern int iommu_page_response(struct device *dev,
+			       struct page_response_msg *msg);
 extern int iommu_group_id(struct iommu_group *group);
 extern struct iommu_group *iommu_group_get_for_dev(struct device *dev);
 extern struct iommu_domain *iommu_group_default_domain(struct iommu_group *);