misc: Migrate away from versionize

Replace with serde instead.

Fixes: #6370

Signed-off-by: Rob Bradford <rbradford@rivosinc.com>

devices/src/ioapic.rs

@@ -11,19 +11,16 @@
 
 use super::interrupt_controller::{Error, InterruptController};
 use byteorder::{ByteOrder, LittleEndian};
+use serde::{Deserialize, Serialize};
 use std::result;
 use std::sync::{Arc, Barrier};
-use versionize::{VersionMap, Versionize, VersionizeResult};
-use versionize_derive::Versionize;
 use vm_device::interrupt::{
     InterruptIndex, InterruptManager, InterruptSourceConfig, InterruptSourceGroup,
     MsiIrqGroupConfig, MsiIrqSourceConfig,
 };
 use vm_device::BusDevice;
 use vm_memory::GuestAddress;
-use vm_migration::{
-    Migratable, MigratableError, Pausable, Snapshot, Snapshottable, Transportable, VersionMapped,
-};
+use vm_migration::{Migratable, MigratableError, Pausable, Snapshot, Snapshottable, Transportable};
 use vmm_sys_util::eventfd::EventFd;
 
 type Result<T> = result::Result<T, Error>;
@@ -136,7 +133,7 @@ pub struct Ioapic {
     interrupt_source_group: Arc<dyn InterruptSourceGroup>,
 }
 
-#[derive(Versionize)]
+#[derive(Serialize, Deserialize)]
 pub struct IoapicState {
     id_reg: u32,
     reg_sel: u32,
@@ -144,7 +141,6 @@ pub struct IoapicState {
     used_entries: [bool; NUM_IOAPIC_PINS],
     apic_address: u64,
 }
-impl VersionMapped for IoapicState {}
 
 impl BusDevice for Ioapic {
     fn read(&mut self, _base: u64, offset: u64, data: &mut [u8]) {
@@ -444,7 +440,7 @@ impl Snapshottable for Ioapic {
     }
 
     fn snapshot(&mut self) -> std::result::Result<Snapshot, MigratableError> {
-        Snapshot::new_from_versioned_state(&self.state())
+        Snapshot::new_from_state(&self.state())
     }
 }