runtime-rs: implement trait for vfio device

add the trait implementation for vfio device,

Fixes:#5375
Signed-off-by: Zhongtao Hu <zhongtaohu.tim@linux.alibaba.com>
Signed-off-by: alex.lyn <alex.lyn@antgroup.com>

src/runtime-rs/crates/hypervisor/src/device/driver/vfio.rs

@@ -6,9 +6,13 @@
 
 use std::{fs, path::Path, process::Command};
 
+use crate::{driver::hypervisor, DeviceConfig};
 #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
 use anyhow::anyhow;
 use anyhow::{Context, Result};
+use async_trait::async_trait;
+
+use crate::Device;
 
 fn override_driver(bdf: &str, driver: &str) -> Result<()> {
     let driver_override = format!("/sys/bus/pci/devices/{}/driver_override", bdf);
@@ -145,3 +149,26 @@ pub fn bind_device_to_host(bdf: &str, host_driver: &str, _vendor_device_id: &str
 
     Ok(())
 }
+
+#[async_trait]
+impl Device for VfioConfig {
+    async fn attach(&self, _h: &dyn hypervisor) -> Result<()> {
+        todo!()
+    }
+
+    async fn detach(&self, _h: &dyn hypervisor) -> Result<u64> {
+        todo!()
+    }
+
+    async fn get_device_info(&self) -> DeviceConfig {
+        todo!()
+    }
+
+    async fn increase_attach_count(&mut self) -> Result<bool> {
+        todo!()
+    }
+
+    async fn decrease_attach_count(&mut self) -> Result<bool> {
+        todo!()
+    }
+}