diff --git a/src/runtime-rs/crates/hypervisor/src/device/driver/mod.rs b/src/runtime-rs/crates/hypervisor/src/device/driver/mod.rs
index 2aff85b8c4..8ccc3dfc68 100644
--- a/src/runtime-rs/crates/hypervisor/src/device/driver/mod.rs
+++ b/src/runtime-rs/crates/hypervisor/src/device/driver/mod.rs
@@ -12,8 +12,8 @@ mod virtio_net;
 mod virtio_vsock;
 
 pub use vfio::{
-    bind_device_to_host, bind_device_to_vfio, get_host_guest_map, get_vfio_device, HostDevice,
-    VfioBusMode, VfioConfig, VfioDevice,
+    bind_device_to_host, bind_device_to_vfio, get_vfio_device, HostDevice, VfioBusMode, VfioConfig,
+    VfioDevice,
 };
 pub use virtio_blk::{
     BlockConfig, BlockDevice, KATA_BLK_DEV_TYPE, KATA_MMIO_BLK_DEV_TYPE, KATA_NVDIMM_DEV_TYPE,
@@ -207,11 +207,4 @@ mod tests {
         assert!(root_slot.is_some());
         assert_eq!(root_slot.unwrap().0, 1);
     }
-
-    #[test]
-    fn test_get_host_guest_map() {
-        // test unwrap is fine, no panic occurs.
-        let hg_map = get_host_guest_map("".to_owned());
-        assert!(hg_map.is_none());
-    }
 }
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 07890de659..be1eb3cb52 100644
--- a/src/runtime-rs/crates/hypervisor/src/device/driver/vfio.rs
+++ b/src/runtime-rs/crates/hypervisor/src/device/driver/vfio.rs
@@ -70,12 +70,6 @@ pub fn generate_guest_pci_path(bdf: String) -> Result<PciPath> {
     })
 }
 
-// get host/guest mapping for info
-pub fn get_host_guest_map(host_bdf: String) -> Option<String> {
-    // safe, just do unwrap as `HOST_GUEST_MAP` is always valid.
-    HOST_GUEST_MAP.read().unwrap().get(&host_bdf).cloned()
-}
-
 pub fn do_check_iommu_on() -> Result<bool> {
     let element = std::fs::read_dir(SYS_CLASS_IOMMU)?
         .filter_map(|e| e.ok())