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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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21
rust/qemu-api/src/device_class.rs
View file

@ -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
};
}
}