[Qemu-arm] [RFC v3 07/27] hw/arm/smmuv3: Advertise VFIO_NESTED and MSI_TRANSLATE attributes

[Eric Auger]

Virtual SMMUv3 requires physical nested stages for VFIO integration
and translates MSIs. So let's advertise those attributes.

Signed-off-by: Eric Auger <address@hidden>

---

v2 -> v3:
- also advertise MSI_TRANSLATE
---
 hw/arm/smmuv3.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/hw/arm/smmuv3.c b/hw/arm/smmuv3.c
index fd8ec7860e..761d722395 100644
--- a/hw/arm/smmuv3.c
+++ b/hw/arm/smmuv3.c
@@ -1490,6 +1490,20 @@ static void smmuv3_notify_flag_changed(IOMMUMemoryRegion 
*iommu,
     }
 }
 
+static int smmuv3_get_attr(IOMMUMemoryRegion *iommu,
+                           enum IOMMUMemoryRegionAttr attr,
+                           void *data)
+{
+    if (attr == IOMMU_ATTR_VFIO_NESTED) {
+        *(bool *) data = true;
+        return 0;
+    } else if (attr == IOMMU_ATTR_MSI_TRANSLATE) {
+        *(bool *) data = true;
+        return 0;
+    }
+    return -EINVAL;
+}
+
 static void smmuv3_iommu_memory_region_class_init(ObjectClass *klass,
                                                   void *data)
 {
@@ -1497,6 +1511,7 @@ static void 
smmuv3_iommu_memory_region_class_init(ObjectClass *klass,
 
     imrc->translate = smmuv3_translate;
     imrc->notify_flag_changed = smmuv3_notify_flag_changed;
+    imrc->get_attr = smmuv3_get_attr;
 }
 
 static const TypeInfo smmuv3_type_info = {
-- 
2.20.1