diff --git a/guest/pvmfw/src/instance.rs b/guest/pvmfw/src/instance.rs
index bb07f74..bbc58ed 100644
--- a/guest/pvmfw/src/instance.rs
+++ b/guest/pvmfw/src/instance.rs
@@ -26,7 +26,10 @@
 use diced_open_dice::Hidden;
 use log::trace;
 use uuid::Uuid;
-use virtio_drivers::transport::{pci::bus::PciRoot, DeviceType, Transport};
+use virtio_drivers::transport::{
+    pci::bus::{ConfigurationAccess, PciRoot},
+    DeviceType, Transport,
+};
 use vmbase::util::ceiling_div;
 use vmbase::virtio::pci::{PciTransportIterator, VirtIOBlk};
 use vmbase::virtio::HalImpl;
@@ -99,7 +102,7 @@
 /// pvmfw in the instance.img as well as index corresponding to empty header which can be used to
 /// record instance data with `record_instance_entry`.
 pub(crate) fn get_recorded_entry(
-    pci_root: &mut PciRoot,
+    pci_root: &mut PciRoot<impl ConfigurationAccess>,
     secret: &[u8],
 ) -> Result<(Option<EntryBody>, Partition, usize)> {
     let mut instance_img = find_instance_img(pci_root)?;
@@ -175,8 +178,8 @@
     }
 }
 
-fn find_instance_img(pci_root: &mut PciRoot) -> Result<Partition> {
-    for transport in PciTransportIterator::<HalImpl>::new(pci_root)
+fn find_instance_img(pci_root: &mut PciRoot<impl ConfigurationAccess>) -> Result<Partition> {
+    for transport in PciTransportIterator::<HalImpl, _>::new(pci_root)
         .filter(|t| DeviceType::Block == t.device_type())
     {
         let device =
diff --git a/guest/pvmfw/src/rollback.rs b/guest/pvmfw/src/rollback.rs
index 74b2cd8..1d84c5b 100644
--- a/guest/pvmfw/src/rollback.rs
+++ b/guest/pvmfw/src/rollback.rs
@@ -25,7 +25,7 @@
 use log::{error, info};
 use pvmfw_avb::Capability;
 use pvmfw_avb::VerifiedBootData;
-use virtio_drivers::transport::pci::bus::PciRoot;
+use virtio_drivers::transport::pci::bus::{ConfigurationAccess, PciRoot};
 use vmbase::fdt::{pci::PciInfo, SwiotlbInfo};
 use vmbase::memory::init_shared_pool;
 use vmbase::rand;
@@ -167,7 +167,9 @@
 }
 
 /// Set up PCI bus and VirtIO-blk device containing the instance.img partition.
-fn initialize_instance_img_device(fdt: &Fdt) -> Result<PciRoot, RebootReason> {
+fn initialize_instance_img_device(
+    fdt: &Fdt,
+) -> Result<PciRoot<impl ConfigurationAccess>, RebootReason> {
     let pci_info = PciInfo::from_fdt(fdt).map_err(|e| {
         error!("Failed to detect PCI from DT: {e}");
         RebootReason::InvalidFdt