Implement get_attr() method and use the IntelIOMMUState::dma_translation
field to report the IOMMU_ATTR_DMA_TRANSLATION attribute.

Signed-off-by: Avihai Horon <avihaih@nvidia.com>
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
---
 hw/i386/intel_iommu.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index c344d49fe290..1906f3a67960 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -3861,6 +3861,29 @@ static void vtd_iommu_replay(IOMMUMemoryRegion *iommu_mr, IOMMUNotifier *n)
     return;
 }
 
+static int vtd_iommu_get_attr(IOMMUMemoryRegion *iommu_mr,
+                              enum IOMMUMemoryRegionAttr attr, void *data)
+{
+    VTDAddressSpace *vtd_as = container_of(iommu_mr, VTDAddressSpace, iommu);
+    IntelIOMMUState *s = vtd_as->iommu_state;
+    int ret = 0;
+
+    switch (attr) {
+    case IOMMU_ATTR_DMA_TRANSLATION:
+    {
+        bool *enabled = data;
+
+        *enabled = s->dma_translation;
+        break;
+    }
+    default:
+        ret = -EINVAL;
+        break;
+    }
+
+    return ret;
+}
+
 /* Do the initialization. It will also be called when reset, so pay
  * attention when adding new initialization stuff.
  */
@@ -4194,6 +4217,7 @@ static void vtd_iommu_memory_region_class_init(ObjectClass *klass,
     imrc->translate = vtd_iommu_translate;
     imrc->notify_flag_changed = vtd_iommu_notify_flag_changed;
     imrc->replay = vtd_iommu_replay;
+    imrc->get_attr = vtd_iommu_get_attr;
 }
 
 static const TypeInfo vtd_iommu_memory_region_info = {
-- 
2.39.3