diff --git a/src/pci_passthrough_assist/pci_device.py b/src/pci_passthrough_assist/pci_device.py
index 4c24123..ee97910 100644
--- a/src/pci_passthrough_assist/pci_device.py
+++ b/src/pci_passthrough_assist/pci_device.py
@@ -1,5 +1,6 @@
 from pci_passthrough_assist.pci import driver_of_pci_device
 from os.path import exists
+from os import listdir
 
 
 class PciDevice:
@@ -13,5 +14,10 @@ class PciDevice:
     def is_vga(self) -> bool:
         return exists(f"/sys/bus/pci/devices/{self.device_id}/boot_vga")
 
+    def devices_in_iommu_group(self) -> list['PciDevice']:
+        device_ids: list[str] = listdir(
+            f"/sys/bus/pci/devices/{self.device_id}/iommu_group/devices")
+        return [PciDevice(device_id) for device_id in device_ids]
+
     def __str__(self) -> str:
-        return f"{self.device_id} driver: {self.driver_name()} VGA: {self.is_vga()}"
\ No newline at end of file
+        return f"{self.device_id} driver: {self.driver_name()} VGA: {self.is_vga()}"