rust: add definitions for vmstate

Add a new qemu_api module, `vmstate`. Declare a bunch of Rust macros declared that are equivalent in spirit to the C macros in include/migration/vmstate.h. For example the Rust of equivalent of the C macro: VMSTATE_UINT32(field_name, struct_name) is: vmstate_uint32!(field_name, StructName) This breathtaking development will allow us to reach feature parity between the Rust and C pl011 implementations. Extracted from a patch by Manos Pitsidianakis (https://lore.kernel.org/qemu-devel/[email protected]/). Signed-off-by: Manos Pitsidianakis <[email protected]> Signed-off-by: Paolo Bonzini <[email protected]>
liuw · Nov 5, 2024 · 0a65e41 · 0a65e41
1 parent f60f367
commit 0a65e41
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Showing 5 changed files with 370 additions and 26 deletions.
diff --git a/rust/qemu-api/meson.build b/rust/qemu-api/meson.build
@@ -5,6 +5,7 @@ _qemu_api_rs = static_library(
       'src/lib.rs',
       'src/definitions.rs',
       'src/device_class.rs',
+      'src/vmstate.rs',
       'src/zeroable.rs',
     ],
     {'.' : bindings_rs},

diff --git a/rust/qemu-api/src/device_class.rs b/rust/qemu-api/src/device_class.rs
@@ -62,24 +62,3 @@ macro_rules! declare_properties {
         ];
     };
 }
-
-#[macro_export]
-macro_rules! vm_state_description {
-    ($(#[$outer:meta])*
-     $name:ident,
-     $(name: $vname:expr,)*
-     $(unmigratable: $um_val:expr,)*
-    ) => {
-        #[used]
-        $(#[$outer])*
-        pub static $name: $crate::bindings::VMStateDescription = $crate::bindings::VMStateDescription {
-            $(name: {
-                #[used]
-                static VMSTATE_NAME: &::core::ffi::CStr = $vname;
-                $vname.as_ptr()
-            },)*
-            unmigratable: true,
-            ..$crate::zeroable::Zeroable::ZERO
-        };
-    }
-}
diff --git a/rust/qemu-api/src/lib.rs b/rust/qemu-api/src/lib.rs
@@ -26,9 +26,12 @@ unsafe impl Send for bindings::Property {}
 unsafe impl Sync for bindings::Property {}
 unsafe impl Sync for bindings::TypeInfo {}
 unsafe impl Sync for bindings::VMStateDescription {}
+unsafe impl Sync for bindings::VMStateField {}
+unsafe impl Sync for bindings::VMStateInfo {}
 
 pub mod definitions;
 pub mod device_class;
+pub mod vmstate;
 pub mod zeroable;
 
 use std::alloc::{GlobalAlloc, Layout};