diff mbox series

[v2,4/6] hw/arm/smmuv3: Advertise VFIO_NESTED

Message ID 20190701093034.18873-5-eric.auger@redhat.com (mailing list archive)
State New, archived
Headers show
Series ARM SMMUv3: Fix spurious notification errors and stall with vfio-pci | expand

Commit Message

Eric Auger July 1, 2019, 9:30 a.m. UTC 
Virtual SMMUv3 requires physical nested stages for VFIO integration.
Advertise this attribute.

Signed-off-by: Eric Auger <eric.auger@redhat.com>

---
---
 hw/arm/smmuv3.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)
diff mbox series

Patch

diff --git a/hw/arm/smmuv3.c b/hw/arm/smmuv3.c
index e96d5beb9a..384c02cb91 100644
--- a/hw/arm/smmuv3.c
+++ b/hw/arm/smmuv3.c
@@ -1490,6 +1490,17 @@  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;
+    }
+    return -EINVAL;
+}
+
 static void smmuv3_iommu_memory_region_class_init(ObjectClass *klass,
                                                   void *data)
 {
@@ -1497,6 +1508,7 @@  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 = {