[PATCH 14/33] rust: move VMState handling to QOM module

[Paolo Bonzini <pbonzini@redhat.com>]

From: Marc-André Lureau <marcandre.lureau@redhat.com>

This will allow to split vmstate to a standalone crate next.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Link: https://lore.kernel.org/r/20250827104147.717203-9-marcandre.lureau@redhat.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 rust/qemu-api/src/qom.rs     |  3 +++
 rust/qemu-api/src/vmstate.rs | 11 +++++------
 2 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/rust/qemu-api/src/qom.rs b/rust/qemu-api/src/qom.rs
index 014ffb1fd88..12c6fc6752c 100644
--- a/rust/qemu-api/src/qom.rs
+++ b/rust/qemu-api/src/qom.rs
@@ -109,6 +109,7 @@
         object_get_typename, object_new, object_ref, object_unref, TypeInfo,
     },
     cell::{bql_locked, Opaque},
+    impl_vmstate_pointer,
 };
 
 /// A safe wrapper around [`bindings::Object`].
@@ -948,3 +949,5 @@ fn debug_fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
 
 impl<T> ObjectClassMethods for T where T: IsA<Object> {}
 impl<R: ObjectDeref> ObjectMethods for R where R::Target: IsA<Object> {}
+
+impl_vmstate_pointer!(Owned<T> where T: VMState + ObjectType);
diff --git a/rust/qemu-api/src/vmstate.rs b/rust/qemu-api/src/vmstate.rs
index 59c7950a5aa..4e1086779ac 100644
--- a/rust/qemu-api/src/vmstate.rs
+++ b/rust/qemu-api/src/vmstate.rs
@@ -40,8 +40,6 @@
     bindings::{self, VMStateFlags},
     callbacks::FnCall,
     errno::{into_neg_errno, Errno},
-    prelude::*,
-    qom::Owned,
     zeroable::Zeroable,
 };
 
@@ -128,7 +126,8 @@ pub const fn vmstate_varray_flag<T: VMState>(_: PhantomData<T>) -> VMStateFlags
 /// * a transparent wrapper for any of the above (`Cell`, `UnsafeCell`,
 ///   [`BqlCell`], [`BqlRefCell`]
 /// * a raw pointer to any of the above
-/// * a `NonNull` pointer, a `Box` or an [`Owned`] for any of the above
+/// * a `NonNull` pointer, a `Box` or an [`Owned`](crate::qom::Owned) for any of
+///   the above
 /// * an array of any of the above
 ///
 /// In order to support other types, the trait `VMState` must be implemented
@@ -335,10 +334,11 @@ unsafe impl VMState for $type {
 // Note that references are not supported, though references to cells
 // could be allowed.
 
+#[macro_export]
 macro_rules! impl_vmstate_pointer {
     ($type:ty where $base:tt: VMState $($where:tt)*) => {
-        unsafe impl<$base> VMState for $type where $base: VMState $($where)* {
-            const BASE: VMStateField = <$base as VMState>::BASE.with_pointer_flag();
+        unsafe impl<$base> $crate::vmstate::VMState for $type where $base: $crate::vmstate::VMState $($where)* {
+            const BASE: $crate::vmstate::VMStateField = <$base as $crate::vmstate::VMState>::BASE.with_pointer_flag();
         }
     };
 }
@@ -350,7 +350,6 @@ unsafe impl<$base> VMState for $type where $base: VMState $($where)* {
 // Unlike C pointers, Box is always non-null therefore there is no need
 // to specify VMS_ALLOC.
 impl_vmstate_pointer!(Box<T> where T: VMState);
-impl_vmstate_pointer!(Owned<T> where T: VMState + ObjectType);
 
 // Arrays using the underlying type's VMState plus
 // VMS_ARRAY/VMS_ARRAY_OF_POINTER
-- 
2.51.0