diff --git a/src/runtime-rs/crates/hypervisor/src/device/device_manager.rs b/src/runtime-rs/crates/hypervisor/src/device/device_manager.rs
index 2b5ef6df54..04dddead35 100644
--- a/src/runtime-rs/crates/hypervisor/src/device/device_manager.rs
+++ b/src/runtime-rs/crates/hypervisor/src/device/device_manager.rs
@@ -291,7 +291,7 @@ impl DeviceManager {
                 Arc::new(Mutex::new(VfioDevice::new(
                     device_id.clone(),
                     &vfio_dev_config,
-                )))
+                )?))
             }
             DeviceConfig::VhostUserBlkCfg(config) => {
                 // try to find the device, found and just return id.
diff --git a/src/runtime-rs/crates/hypervisor/src/device/driver/vfio.rs b/src/runtime-rs/crates/hypervisor/src/device/driver/vfio.rs
index 3e4534be3a..aac879a594 100644
--- a/src/runtime-rs/crates/hypervisor/src/device/driver/vfio.rs
+++ b/src/runtime-rs/crates/hypervisor/src/device/driver/vfio.rs
@@ -252,7 +252,7 @@ pub struct VfioDevice {
 
 impl VfioDevice {
     // new with VfioConfig
-    pub fn new(device_id: String, dev_info: &VfioConfig) -> Self {
+    pub fn new(device_id: String, dev_info: &VfioConfig) -> Result<Self> {
         // devices and device_options are in a 1-1 mapping, used in
         // vfio-pci handler for kata-agent.
         let devices: Vec<HostDevice> = Vec::with_capacity(MAX_DEV_ID_SIZE);
@@ -262,7 +262,7 @@ impl VfioDevice {
         let dev_type = dev_info.dev_type.as_str();
         let driver_type = VfioBusMode::driver_type(dev_type).to_owned();
 
-        Self {
+        let mut vfio_device = Self {
             device_id,
             attach_count: 0,
             bus_mode: VfioBusMode::PCI,
@@ -270,7 +270,13 @@ impl VfioDevice {
             config: dev_info.clone(),
             devices,
             device_options,
-        }
+        };
+
+        vfio_device
+            .initialize_vfio_device()
+            .context("initialize vfio device failed.")?;
+
+        Ok(vfio_device)
     }
 
     fn get_host_path(&self) -> String {
@@ -370,7 +376,7 @@ impl VfioDevice {
         Ok(DeviceVendor(device, vendor))
     }
 
-    async fn set_vfio_config(
+    fn set_vfio_config(
         &mut self,
         iommu_devs_path: PathBuf,
         device_name: &str,
@@ -422,11 +428,8 @@ impl VfioDevice {
             _ => None,
         }
     }
-}
 
-#[async_trait]
-impl Device for VfioDevice {
-    async fn attach(&mut self, h: &dyn hypervisor) -> Result<()> {
+    fn initialize_vfio_device(&mut self) -> Result<()> {
         // host path: /dev/vfio/X
         let host_path = self.get_host_path();
         // vfio group: X
@@ -460,7 +463,6 @@ impl Device for VfioDevice {
 
             let mut hostdev: HostDevice = self
                 .set_vfio_config(iommu_devs_path.clone(), device)
-                .await
                 .context("set vfio config failed")?;
             let dev_prefix = self.get_vfio_prefix();
             hostdev.hostdev_id = make_device_nameid(&dev_prefix, index, MAX_DEV_ID_SIZE);
@@ -468,6 +470,13 @@ impl Device for VfioDevice {
             self.devices.push(hostdev);
         }
 
+        Ok(())
+    }
+}
+
+#[async_trait]
+impl Device for VfioDevice {
+    async fn attach(&mut self, h: &dyn hypervisor) -> Result<()> {
         if self
             .increase_attach_count()
             .await