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rust: add definitions for vmstate

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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/20241024-rust-round-2-v1-4-051e7a25b978@linaro.org/).

Signed-off-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Manos Pitsidianakis 2024-10-25 07:55:50 +02:00 • committed by Paolo Bonzini
parent f60f3670fd
commit 0a65e4124a
5 changed files with 370 additions and 26 deletions
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11
rust/qemu-api/tests/tests.rs
View file

@ -8,17 +8,18 @@ use qemu_api::{
bindings::*,
declare_properties, define_property,
definitions::{Class, ObjectImpl},
device_class_init, vm_state_description,
device_class_init,
zeroable::Zeroable,
};
#[test]
fn test_device_decl_macros() {
// Test that macros can compile.
vm_state_description! {
VMSTATE,
name: c"name",
pub static VMSTATE: VMStateDescription = VMStateDescription {
name: c"name".as_ptr(),
unmigratable: true,
}
..Zeroable::ZERO
};
#[repr(C)]
#[derive(qemu_api_macros::Object)]