On 8/15/2024 7:42 PM, Manos Pitsidianakis wrote:
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....@intel.com>
Co-authored-by: Paolo Bonzini <pbonz...@redhat.com>
Signed-off-by: Junjie Mao <junjie....@intel.com>
Signed-off-by: Paolo Bonzini <pbonz...@redhat.com>
Signed-off-by: Manos Pitsidianakis <manos.pitsidiana...@linaro.org>
---
[snip]
+
+#[macro_export]
+macro_rules! declare_properties {
+ ($ident:ident, $($prop:expr),*$(,)*) => {
+
+ const fn _calc_prop_len() -> usize {
+ let mut len = 1;
+ $({
+ _ = stringify!($prop);
+ len += 1;
+ })*
+ len
+ }
+ const PROP_LEN: usize = _calc_prop_len();
+
+ #[no_mangle]
+ fn _make_properties() -> [$crate::bindings::Property; PROP_LEN] {
#[no_mangle] also makes _make_properties externally visible and thus will cause
duplicate-symbol-definition errors at link time when multiple devices are enabled.
Since it is only used in the definition of $ident below, shall we just remove
#[no_mangle] for _make_properties?
---
Best Regards
Junjie Mao
+ [
+ $($prop),*,
+ unsafe {
::core::mem::MaybeUninit::<$crate::bindings::Property>::zeroed().assume_init()
},
+ ]
+ }
+
+ #[no_mangle]
+ pub static mut $ident: $crate::device_class::Properties<PROP_LEN> =
$crate::device_class::Properties(::std::sync::OnceLock::new(), _make_properties);
+ };
+}
+
+#[macro_export]
+macro_rules! vm_state_description {
+ ($(#[$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;
+ $vname.as_ptr()
+ },)*
+ unmigratable: true,
+ ..unsafe {
::core::mem::MaybeUninit::<$crate::bindings::VMStateDescription>::zeroed().assume_init()
}
+ };
+ }
+}
