[PATCH 07/12] iommu/vt-d: Add is_identity_map ops entry

[Lu Baolu]

This adds the is_identity_map ops entry for Intel IOMMU driver.

Signed-off-by: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>
---
 drivers/iommu/intel-iommu.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 282257e2628d..eb8aca8d1dc9 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -5181,6 +5181,11 @@ 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)
 {
@@ -5276,6 +5281,7 @@ 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		= pci_device_group,
+	.is_identity_map	= intel_iommu_is_identity_map,
 	.pgsize_bitmap		= INTEL_IOMMU_PGSIZES,
 };
 
-- 
2.17.1


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