7 files changed, 136 insertions, 0 deletions
diff --git a/rust/chardev/Cargo.toml b/rust/chardev/Cargo.toml
new file mode 100644
index 0000000000..7df9c677fc
--- /dev/null
+++ b/rust/chardev/Cargo.toml
@@ -0,0 +1,24 @@
+[package]
+name = "chardev"
+version = "0.1.0"
+description = "Rust bindings for QEMU/chardev"
+resolver = "2"
+publish = false
+
+authors.workspace = true
+edition.workspace = true
+homepage.workspace = true
+license.workspace = true
+repository.workspace = true
+rust-version.workspace = true
+
+[dependencies]
+common = { path = "../common" }
+bql = { path = "../bql" }
+migration = { path = "../migration" }
+qom = { path = "../qom" }
+util = { path = "../util" }
+qemu_api_macros = { path = "../qemu-api-macros" }
+
+[lints]
+workspace = true
diff --git a/rust/chardev/build.rs b/rust/chardev/build.rs
new file mode 120000
index 0000000000..71a3167885
--- /dev/null
+++ b/rust/chardev/build.rs
@@ -0,0 +1 @@
+../util/build.rs
\ No newline at end of file
diff --git a/rust/chardev/meson.build b/rust/chardev/meson.build
new file mode 100644
index 0000000000..5d333e232b
--- /dev/null
+++ b/rust/chardev/meson.build
@@ -0,0 +1,41 @@
+c_enums = [
+  'QEMUChrEvent',
+]
+_chardev_bindgen_args = []
+foreach enum : c_enums
+  _chardev_bindgen_args += ['--rustified-enum', enum]
+endforeach
+
+# TODO: Remove this comment when the clang/libclang mismatch issue is solved.
+#
+# Rust bindings generation with `bindgen` might fail in some cases where the
+# detected `libclang` does not match the expected `clang` version/target. In
+# this case you must pass the path to `clang` and `libclang` to your build
+# command invocation using the environment variables CLANG_PATH and
+# LIBCLANG_PATH
+_chardev_bindings_inc_rs = rust.bindgen(
+  input: 'wrapper.h',
+  dependencies: common_ss.all_dependencies(),
+  output: 'bindings.inc.rs',
+  include_directories: bindings_incdir,
+  bindgen_version: ['>=0.60.0'],
+  args: bindgen_args_common + _chardev_bindgen_args,
+)
+
+_chardev_rs = static_library(
+  'chardev',
+  structured_sources(
+    [
+      'src/lib.rs',
+      'src/bindings.rs',
+      'src/chardev.rs',
+    ],
+    {'.': _chardev_bindings_inc_rs}
+  ),
+  override_options: ['rust_std=2021', 'build.rust_std=2021'],
+  rust_abi: 'rust',
+  link_with: [_bql_rs, _migration_rs, _qom_rs, _util_rs],
+  dependencies: [common_rs, qemu_api_macros],
+)
+
+chardev_rs = declare_dependency(link_with: [_chardev_rs], dependencies: [qemu_api_macros, chardev, qemuutil])
diff --git a/rust/chardev/src/bindings.rs b/rust/chardev/src/bindings.rs
new file mode 100644
index 0000000000..2d98026d62
--- /dev/null
+++ b/rust/chardev/src/bindings.rs
@@ -0,0 +1,36 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+#![allow(
+    dead_code,
+    improper_ctypes_definitions,
+    improper_ctypes,
+    non_camel_case_types,
+    non_snake_case,
+    non_upper_case_globals,
+    unnecessary_transmutes,
+    unsafe_op_in_unsafe_fn,
+    clippy::pedantic,
+    clippy::restriction,
+    clippy::style,
+    clippy::missing_const_for_fn,
+    clippy::ptr_offset_with_cast,
+    clippy::useless_transmute,
+    clippy::missing_safety_doc,
+    clippy::too_many_arguments
+)]
+
+use common::Zeroable;
+
+#[cfg(MESON)]
+include!("bindings.inc.rs");
+
+#[cfg(not(MESON))]
+include!(concat!(env!("OUT_DIR"), "/bindings.inc.rs"));
+
+// SAFETY: these are implemented in C; the bindings need to assert that the
+// BQL is taken, either directly or via `BqlCell` and `BqlRefCell`.
+// When bindings for character devices are introduced, this can be
+// moved to the Opaque<> wrapper in src/chardev.rs.
+unsafe impl Send for CharBackend {}
+unsafe impl Sync for CharBackend {}
+
+unsafe impl Zeroable for CharBackend {}
diff --git a/rust/qemu-api/src/chardev.rs b/rust/chardev/src/chardev.rs
index 072d806e4a..072d806e4a 100644
--- a/rust/qemu-api/src/chardev.rs
+++ b/rust/chardev/src/chardev.rs
diff --git a/rust/chardev/src/lib.rs b/rust/chardev/src/lib.rs
new file mode 100644
index 0000000000..2e549f99d9
--- /dev/null
+++ b/rust/chardev/src/lib.rs
@@ -0,0 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+pub mod bindings;
+
+mod chardev;
+pub use chardev::*;
diff --git a/rust/chardev/wrapper.h b/rust/chardev/wrapper.h
new file mode 100644
index 0000000000..65ede6ea6d
--- /dev/null
+++ b/rust/chardev/wrapper.h
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+/*
+ * This header file is meant to be used as input to the `bindgen` application
+ * in order to generate C FFI compatible Rust bindings.
+ */
+
+#ifndef __CLANG_STDATOMIC_H
+#define __CLANG_STDATOMIC_H
+/*
+ * Fix potential missing stdatomic.h error in case bindgen does not insert the
+ * correct libclang header paths on its own. We do not use stdatomic.h symbols
+ * in QEMU code, so it's fine to declare dummy types instead.
+ */
+typedef enum memory_order {
+  memory_order_relaxed,
+  memory_order_consume,
+  memory_order_acquire,
+  memory_order_release,
+  memory_order_acq_rel,
+  memory_order_seq_cst,
+} memory_order;
+#endif /* __CLANG_STDATOMIC_H */
+
+#include "qemu/osdep.h"
+
+#include "chardev/char-fe.h"
+#include "chardev/char-serial.h"