diff --git a/hw/vfio/iommufd.c b/hw/vfio/iommufd.c
index f1e7cf3e9c..fb87e64e44 100644
--- a/hw/vfio/iommufd.c
+++ b/hw/vfio/iommufd.c
@@ -725,6 +725,7 @@ static bool hiod_iommufd_vfio_realize(HostIOMMUDevice *hiod, void *opaque,
 
     hiod->name = g_strdup(vdev->name);
     caps->type = type;
+    caps->hw_caps = hw_caps;
 
     return true;
 }
diff --git a/include/sysemu/host_iommu_device.h b/include/sysemu/host_iommu_device.h
index d1c10ff7c2..809cced4ba 100644
--- a/include/sysemu/host_iommu_device.h
+++ b/include/sysemu/host_iommu_device.h
@@ -19,9 +19,13 @@
  * struct HostIOMMUDeviceCaps - Define host IOMMU device capabilities.
  *
  * @type: host platform IOMMU type.
+ *
+ * @hw_caps: host platform IOMMU capabilities (e.g. on IOMMUFD this represents
+ *           the @out_capabilities value returned from IOMMU_GET_HW_INFO ioctl)
  */
 typedef struct HostIOMMUDeviceCaps {
     uint32_t type;
+    uint64_t hw_caps;
 } HostIOMMUDeviceCaps;
 
 #define TYPE_HOST_IOMMU_DEVICE "host-iommu-device"