rust: add crate to expose bindings and interfaces

Add rust/qemu-api, which exposes rust-bindgen generated FFI bindings and
provides some declaration macros for symbols visible to the rest of
QEMU.

Co-authored-by: Junjie Mao <junjie.mao@intel.com>
Co-authored-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Junjie Mao <junjie.mao@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Link: https://lore.kernel.org/r/0fb23fbe211761b263aacec03deaf85c0cc39995.1727961605.git.manos.pitsidianakis@linaro.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 49 insertions, 0 deletions

diff --git a/rust/qemu-api/src/tests.rs b/rust/qemu-api/src/tests.rs
new file mode 100644
index 0000000000..df54edbd4e
--- /dev/null
+++ b/rust/qemu-api/src/tests.rs
@@ -0,0 +1,49 @@
+// Copyright 2024, Linaro Limited
+// Author(s): Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+use crate::{
+    bindings::*, declare_properties, define_property, device_class_init, vm_state_description,
+};
+
+#[test]
+fn test_device_decl_macros() {
+    // Test that macros can compile.
+    vm_state_description! {
+        VMSTATE,
+        name: c"name",
+        unmigratable: true,
+    }
+
+    #[repr(C)]
+    pub struct DummyState {
+        pub char_backend: CharBackend,
+        pub migrate_clock: bool,
+    }
+
+    declare_properties! {
+        DUMMY_PROPERTIES,
+            define_property!(
+                c"chardev",
+                DummyState,
+                char_backend,
+                unsafe { &qdev_prop_chr },
+                CharBackend
+            ),
+            define_property!(
+                c"migrate-clk",
+                DummyState,
+                migrate_clock,
+                unsafe { &qdev_prop_bool },
+                bool
+            ),
+    }
+
+    device_class_init! {
+        dummy_class_init,
+        props => DUMMY_PROPERTIES,
+        realize_fn => None,
+        reset_fn => None,
+        vmsd => VMSTATE,
+    }
+}