diff --git a/hypervisor/dm/vpci/pci_pt.c b/hypervisor/dm/vpci/pci_pt.c
index 429e2e21d..1861a96ca 100644
--- a/hypervisor/dm/vpci/pci_pt.c
+++ b/hypervisor/dm/vpci/pci_pt.c
@@ -140,31 +140,12 @@ static void vdev_pt_allow_io_vbar(struct pci_vdev *vdev, uint32_t idx)
 	/* For SOS, all port IO access is allowed by default, so skip SOS here */
 	if (!is_sos_vm(vm)) {
 		struct pci_vbar *vbar = &vdev->vbars[idx];
-		if (vbar->base_gpa != 0UL) {
-			allow_guest_pio_access(vm, (uint16_t)vbar->base_gpa, (uint32_t)(vbar->size));
+		if (vbar->base_hpa != 0UL) {
+			allow_guest_pio_access(vm, (uint16_t)vbar->base_hpa, (uint32_t)(vbar->size));
 		}
 	}
 }
 
-/**
- * @brief Deny IO bar access
- * @pre vdev != NULL
- * @pre vdev->vpci != NULL
- */
-static void vdev_pt_deny_io_vbar(struct pci_vdev *vdev, uint32_t idx)
-{
-	struct acrn_vm *vm = vpci2vm(vdev->vpci);
-
-	/* For SOS, all port IO access is allowed by default, so skip SOS here */
-	if (!is_sos_vm(vm)) {
-		struct pci_vbar *vbar = &vdev->vbars[idx];
-		if (vbar->base_gpa != 0UL) {
-			deny_guest_pio_access(vm, (uint16_t)(vbar->base_gpa), (uint32_t)(vbar->size));
-		}
-
-	}
-}
-
 /**
  * @pre vdev != NULL
  */
@@ -176,10 +157,8 @@ void vdev_pt_write_vbar(struct pci_vdev *vdev, uint32_t idx, uint32_t val)
 
 	switch (vbar->type) {
 	case PCIBAR_IO_SPACE:
-		vdev_pt_deny_io_vbar(vdev, update_idx);
 		if (val != ~0U) {
 			pci_vdev_write_vbar(vdev, idx, val);
-			vdev_pt_allow_io_vbar(vdev, update_idx);
 		} else {
 			pci_vdev_write_vcfg(vdev, offset, 4U, val);
 			vdev->vbars[update_idx].base_gpa = 0UL;
@@ -334,6 +313,10 @@ static void init_bars(struct pci_vdev *vdev, bool is_sriov_bar)
 				if (!is_sriov_bar) {
 					pci_vdev_write_vbar(vdev, idx, lo);
 				}
+
+				if (type == PCIBAR_IO_SPACE) {
+					vdev_pt_allow_io_vbar(vdev, idx);
+				}
 			}
 		}
 	}