misc: Migrate away from versionize

Replace with serde instead.

Fixes: #6370

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

virtio-devices/src/pmem.rs

@@ -18,6 +18,7 @@ use crate::{GuestMemoryMmap, MmapRegion};
 use crate::{VirtioInterrupt, VirtioInterruptType};
 use anyhow::anyhow;
 use seccompiler::SeccompAction;
+use serde::{Deserialize, Serialize};
 use std::fs::File;
 use std::io;
 use std::mem::size_of;
@@ -26,14 +27,11 @@ use std::result;
 use std::sync::atomic::AtomicBool;
 use std::sync::{Arc, Barrier};
 use thiserror::Error;
-use versionize::{VersionMap, Versionize, VersionizeResult};
-use versionize_derive::Versionize;
 use virtio_queue::{DescriptorChain, Queue, QueueT};
 use vm_memory::{
     Address, ByteValued, Bytes, GuestAddress, GuestAddressSpace, GuestMemoryAtomic,
     GuestMemoryError, GuestMemoryLoadGuard,
 };
-use vm_migration::VersionMapped;
 use vm_migration::{Migratable, MigratableError, Pausable, Snapshot, Snapshottable, Transportable};
 use vm_virtio::{AccessPlatform, Translatable};
 use vmm_sys_util::eventfd::EventFd;
@@ -48,7 +46,7 @@ const VIRTIO_PMEM_RESP_TYPE_EIO: u32 = 1;
 // New descriptors are pending on the virtio queue.
 const QUEUE_AVAIL_EVENT: u16 = EPOLL_HELPER_EVENT_LAST + 1;
 
-#[derive(Copy, Clone, Debug, Default, Versionize)]
+#[derive(Copy, Clone, Debug, Default, Serialize, Deserialize)]
 #[repr(C)]
 struct VirtioPmemConfig {
     start: u64,
@@ -279,15 +277,13 @@ pub struct Pmem {
     _region: MmapRegion,
 }
 
-#[derive(Versionize)]
+#[derive(Serialize, Deserialize)]
 pub struct PmemState {
     avail_features: u64,
     acked_features: u64,
     config: VirtioPmemConfig,
 }
 
-impl VersionMapped for PmemState {}
-
 impl Pmem {
     #[allow(clippy::too_many_arguments)]
     pub fn new(
@@ -468,7 +464,7 @@ impl Snapshottable for Pmem {
     }
 
     fn snapshot(&mut self) -> std::result::Result<Snapshot, MigratableError> {
-        Snapshot::new_from_versioned_state(&self.state())
+        Snapshot::new_from_state(&self.state())
     }
 }