rust: move vmstate_clock!() to qdev module

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/20250827104147.717203-8-marcandre.lureau@redhat.com
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

rust/qemu-api/src/qdev.rs

@@ -17,6 +17,7 @@ use crate::{
     cell::{bql_locked, Opaque},
     chardev::Chardev,
     error::{Error, Result},
+    impl_vmstate_c_struct,
     irq::InterruptSource,
     prelude::*,
     qom::{ObjectClass, ObjectImpl, Owned, ParentInit},
@@ -455,3 +456,5 @@ unsafe impl ObjectType for Clock {
         unsafe { CStr::from_bytes_with_nul_unchecked(bindings::TYPE_CLOCK) };
 }
 qom_isa!(Clock: Object);
+
+impl_vmstate_c_struct!(Clock, bindings::vmstate_clock);

rust/qemu-api/src/vmstate.rs

@@ -41,7 +41,6 @@ use crate::{
     callbacks::FnCall,
     errno::{into_neg_errno, Errno},
     prelude::*,
-    qdev,
     qom::Owned,
     zeroable::Zeroable,
 };
@@ -318,21 +317,20 @@ impl_vmstate_scalar!(vmstate_info_uint32, u32, VMS_VARRAY_UINT32);
 impl_vmstate_scalar!(vmstate_info_uint64, u64);
 impl_vmstate_scalar!(vmstate_info_timer, crate::timer::Timer);
 
+#[macro_export]
 macro_rules! impl_vmstate_c_struct {
     ($type:ty, $vmsd:expr) => {
         unsafe impl VMState for $type {
-            const BASE: VMStateField = $crate::bindings::VMStateField {
-                vmsd: addr_of!($vmsd),
-                size: mem::size_of::<$type>(),
-                flags: VMStateFlags::VMS_STRUCT,
-                ..Zeroable::ZERO
+            const BASE: $crate::bindings::VMStateField = $crate::bindings::VMStateField {
+                vmsd: ::std::ptr::addr_of!($vmsd),
+                size: ::std::mem::size_of::<$type>(),
+                flags: $crate::bindings::VMStateFlags::VMS_STRUCT,
+                ..$crate::zeroable::Zeroable::ZERO
             };
         }
     };
 }
 
-impl_vmstate_c_struct!(qdev::Clock, bindings::vmstate_clock);
-
 // Pointer types using the underlying type's VMState plus VMS_POINTER
 // Note that references are not supported, though references to cells
 // could be allowed.