From 55d091d75abc677438feef803fa88b1facdc7cb2 Mon Sep 17 00:00:00 2001
From: Lu Baolu <baolu.lu@linux.intel.com>
Date: Thu, 7 Mar 2019 12:53:12 +0800
Subject: [PATCH 6/9] iommu/vt-d: Add is_identity_map ops entry

This adds the is_identity_map ops entry for Intel IOMMU driver.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 1db0ceb33020..e79df3cf548c 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -5344,6 +5344,11 @@ static void intel_iommu_apply_resv_region(struct device *dev,
 	WARN_ON_ONCE(reserve_iova(&dmar_domain->iovad, start, end) == NULL);
 }
 
+static bool intel_iommu_is_identity_map(struct device *dev)
+{
+	return iommu_should_identity_map(dev, 1);
+}
+
 #ifdef CONFIG_INTEL_IOMMU_SVM
 int intel_iommu_enable_pasid(struct intel_iommu *iommu, struct intel_svm_dev *sdev)
 {
@@ -5455,6 +5460,7 @@ const struct iommu_ops intel_iommu_ops = {
 	.put_resv_regions	= intel_iommu_put_resv_regions,
 	.apply_resv_region	= intel_iommu_apply_resv_region,
 	.device_group		= intel_iommu_pci_device_group,
+	.is_identity_map	= intel_iommu_is_identity_map,
 	.pgsize_bitmap		= INTEL_IOMMU_PGSIZES,
 };
 
-- 
2.17.1