From: Marc-André Lureau <marcandre.lur...@redhat.com>
Signed-off-by: Marc-André Lureau <marcandre.lur...@redhat.com>
---
MAINTAINERS | 1 +
rust/chardev/wrapper.h | 28 ++++++++++++
rust/qemu-api/wrapper.h | 2 -
rust/Cargo.lock | 14 ++++++
rust/chardev/Cargo.toml | 24 ++++++++++
rust/chardev/build.rs | 43 ++++++++++++++++++
rust/chardev/meson.build | 54 +++++++++++++++++++++++
rust/chardev/src/bindings.rs | 36 +++++++++++++++
rust/{qemu-api => chardev}/src/chardev.rs | 0
rust/chardev/src/lib.rs | 4 ++
rust/hw/char/pl011/Cargo.toml | 1 +
rust/hw/char/pl011/meson.build | 1 +
rust/hw/char/pl011/src/device.rs | 2 +-
rust/meson.build | 1 +
rust/qemu-api/Cargo.toml | 1 +
rust/qemu-api/meson.build | 7 ++-
rust/qemu-api/src/bindings.rs | 9 +---
rust/qemu-api/src/lib.rs | 1 -
rust/qemu-api/src/qdev.rs | 2 +-
19 files changed, 214 insertions(+), 17 deletions(-)
create mode 100644 rust/chardev/wrapper.h
create mode 100644 rust/chardev/Cargo.toml
create mode 100644 rust/chardev/build.rs
create mode 100644 rust/chardev/meson.build
create mode 100644 rust/chardev/src/bindings.rs
rename rust/{qemu-api => chardev}/src/chardev.rs (100%)
create mode 100644 rust/chardev/src/lib.rs
diff --git a/MAINTAINERS b/MAINTAINERS
index 8054913502..4ab89b208c 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3511,6 +3511,7 @@ Rust
M: Manos Pitsidianakis <manos.pitsidiana...@linaro.org>
S: Maintained
F: rust/bql/
+F: rust/chardev/
F: rust/common/
F: rust/migration/
F: rust/qemu-api
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"
diff --git a/rust/qemu-api/wrapper.h b/rust/qemu-api/wrapper.h
index b99df9f568..07dbc9987a 100644
--- a/rust/qemu-api/wrapper.h
+++ b/rust/qemu-api/wrapper.h
@@ -52,13 +52,11 @@ typedef enum memory_order {
#include "system/system.h"
#include "hw/sysbus.h"
#include "system/memory.h"
-#include "chardev/char-fe.h"
#include "hw/clock.h"
#include "hw/qdev-clock.h"
#include "hw/qdev-properties.h"
#include "hw/qdev-properties-system.h"
#include "hw/irq.h"
-#include "chardev/char-serial.h"
#include "exec/memattrs.h"
#include "system/address-spaces.h"
#include "hw/char/pl011.h"
diff --git a/rust/Cargo.lock b/rust/Cargo.lock
index 0f1dcea6e4..ac325969cc 100644
--- a/rust/Cargo.lock
+++ b/rust/Cargo.lock
@@ -51,6 +51,18 @@ dependencies = [
"migration",
]
+[[package]]
+name = "chardev"
+version = "0.1.0"
+dependencies = [
+ "bql",
+ "common",
+ "migration",
+ "qemu_api_macros",
+ "qom",
+ "util",
+]
+
[[package]]
name = "common"
version = "0.1.0"
@@ -115,6 +127,7 @@ dependencies = [
"bilge-impl",
"bits",
"bql",
+ "chardev",
"common",
"migration",
"qemu_api",
@@ -161,6 +174,7 @@ version = "0.1.0"
dependencies = [
"anyhow",
"bql",
+ "chardev",
"common",
"foreign",
"libc",
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 100644
index 0000000000..b684233f7f
--- /dev/null
+++ b/rust/chardev/build.rs
@@ -0,0 +1,43 @@
+// Copyright 2024, Linaro Limited
+// Author(s): Manos Pitsidianakis <manos.pitsidiana...@linaro.org>
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#[cfg(unix)]
+use std::os::unix::fs::symlink as symlink_file;
+#[cfg(windows)]
+use std::os::windows::fs::symlink_file;
+use std::{env, fs::remove_file, io::Result, path::Path};
+
+fn main() -> Result<()> {
+ let file = if let Ok(root) = env::var("MESON_BUILD_ROOT") {
+ format!("{root}/rust/chardev/bindings.inc.rs")
+ } else {
+ // Placing bindings.inc.rs in the source directory is supported
+ // but not documented or encouraged.
+ format!("{}/src/bindings.inc.rs", env!("CARGO_MANIFEST_DIR"))
+ };
+
+ let file = Path::new(&file);
+ if !Path::new(&file).exists() {
+ panic!(concat!(
+ "\n",
+ " No generated C bindings found! Maybe you wanted one of\n",
+ " `make clippy`, `make rustfmt`, `make rustdoc`?\n",
+ "\n",
+ " For other uses of `cargo`, start a subshell with\n",
+ " `pyvenv/bin/meson devenv`, or point MESON_BUILD_ROOT to\n",
+ " the top of the build tree."
+ ));
+ }
+
+ let out_dir = env::var("OUT_DIR").unwrap();
+ let dest_path = format!("{out_dir}/bindings.inc.rs");
+ let dest_path = Path::new(&dest_path);
+ if dest_path.symlink_metadata().is_ok() {
+ remove_file(dest_path)?;
+ }
+ symlink_file(file, dest_path)?;
+
+ println!("cargo:rerun-if-changed=build.rs");
+ Ok(())
+}
diff --git a/rust/chardev/meson.build b/rust/chardev/meson.build
new file mode 100644
index 0000000000..918e0a5224
--- /dev/null
+++ b/rust/chardev/meson.build
@@ -0,0 +1,54 @@
+_chardev_cfg = run_command(rustc_args,
+ '--config-headers', config_host_h, '--features', files('Cargo.toml'),
+ capture: true, check: true).stdout().strip().splitlines()
+
+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',
+ rust_args: _chardev_cfg,
+ dependencies: [qemuutil_rs, common_rs, bql_rs, migration_rs,
qemu_api_macros, qom_rs, util_rs, chardev],
+)
+
+chardev_rs = declare_dependency(link_with: [_chardev_rs], dependencies:
[qemu_api_macros, chardev])
+
+# Doctests are essentially integration tests, so they need the same
dependencies.
+# Note that running them requires the object files for C code, so place them
+# in a separate suite that is run by the "build" CI jobs rather than "check".
+rust.doctest('rust-chardev-rs-doctests',
+ _chardev_rs,
+ protocol: 'rust',
+ dependencies: chardev_rs,
+ suite: ['doc', 'rust'])
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
similarity index 100%
rename from rust/qemu-api/src/chardev.rs
rename to 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..2863b4c7ad
--- /dev/null
+++ b/rust/chardev/src/lib.rs
@@ -0,0 +1,4 @@
+pub mod bindings;
+
+mod chardev;
+pub use chardev::*;
diff --git a/rust/hw/char/pl011/Cargo.toml b/rust/hw/char/pl011/Cargo.toml
index da89f78727..f7ad5f8e08 100644
--- a/rust/hw/char/pl011/Cargo.toml
+++ b/rust/hw/char/pl011/Cargo.toml
@@ -21,6 +21,7 @@ util = { path = "../../../util" }
bql = { path = "../../../bql" }
migration = { path = "../../../migration" }
qom = { path = "../../../qom" }
+chardev = { path = "../../../chardev" }
qemu_api = { path = "../../../qemu-api" }
qemu_api_macros = { path = "../../../qemu-api-macros" }
diff --git a/rust/hw/char/pl011/meson.build b/rust/hw/char/pl011/meson.build
index cd855408a5..552ccc0d60 100644
--- a/rust/hw/char/pl011/meson.build
+++ b/rust/hw/char/pl011/meson.build
@@ -14,6 +14,7 @@ _libpl011_rs = static_library(
qemu_api,
qemu_api_macros,
qom_rs,
+ chardev_rs,
],
)
diff --git a/rust/hw/char/pl011/src/device.rs b/rust/hw/char/pl011/src/device.rs
index a3bcd1297a..b1c65bd79c 100644
--- a/rust/hw/char/pl011/src/device.rs
+++ b/rust/hw/char/pl011/src/device.rs
@@ -9,6 +9,7 @@
};
use bql::BqlRefCell;
+use chardev::{CharBackend, Chardev, Event};
use common::{static_assert, uninit_field_mut, Zeroable};
use migration::{
impl_vmstate_forward, vmstate_fields, vmstate_of, vmstate_struct,
vmstate_subsections,
@@ -16,7 +17,6 @@
};
use qemu_api::{
bindings::{qdev_prop_bool, qdev_prop_chr},
- chardev::{CharBackend, Chardev, Event},
irq::{IRQState, InterruptSource},
memory::{hwaddr, MemoryRegion, MemoryRegionOps, MemoryRegionOpsBuilder},
prelude::*,
diff --git a/rust/meson.build b/rust/meson.build
index 043603d416..4d9e291223 100644
--- a/rust/meson.build
+++ b/rust/meson.build
@@ -29,6 +29,7 @@ subdir('util')
subdir('migration')
subdir('bql')
subdir('qom')
+subdir('chardev')
subdir('qemu-api')
subdir('hw')
diff --git a/rust/qemu-api/Cargo.toml b/rust/qemu-api/Cargo.toml
index 333cef1c5d..b8aa6d037c 100644
--- a/rust/qemu-api/Cargo.toml
+++ b/rust/qemu-api/Cargo.toml
@@ -15,6 +15,7 @@ rust-version.workspace = true
[dependencies]
common = { path = "../common" }
+chardev = { path = "../chardev" }
migration = { path = "../migration" }
util = { path = "../util" }
bql = { path = "../bql" }
diff --git a/rust/qemu-api/meson.build b/rust/qemu-api/meson.build
index c5038aa5bd..e3af8f86c1 100644
--- a/rust/qemu-api/meson.build
+++ b/rust/qemu-api/meson.build
@@ -7,7 +7,6 @@ c_enums = [
'GpioPolarity',
'MachineInitPhase',
'MemoryDeviceInfoKind',
- 'QEMUChrEvent',
'ResetType',
'device_endian',
]
@@ -23,9 +22,10 @@ foreach enum : c_bitfields
endforeach
blocked_type = [
+ 'Chardev',
+ 'Error',
'ObjectClass',
'VMStateDescription',
- 'Error',
]
foreach type: blocked_type
_qemu_api_bindgen_args += ['--blocklist-type', type]
@@ -53,7 +53,6 @@ _qemu_api_rs = static_library(
[
'src/lib.rs',
'src/bindings.rs',
- 'src/chardev.rs',
'src/irq.rs',
'src/memory.rs',
'src/prelude.rs',
@@ -65,7 +64,7 @@ _qemu_api_rs = static_library(
override_options: ['rust_std=2021', 'build.rust_std=2021'],
rust_abi: 'rust',
rust_args: _qemu_api_cfg,
- dependencies: [anyhow_rs, common_rs, foreign_rs, libc_rs, qemu_api_macros,
qemuutil_rs, util_rs, migration_rs, bql_rs, qom_rs,
+ dependencies: [anyhow_rs, common_rs, chardev_rs, foreign_rs, libc_rs,
qemu_api_macros, qemuutil_rs, util_rs, migration_rs, bql_rs, qom_rs,
qom, hwcore, chardev, migration],
)
diff --git a/rust/qemu-api/src/bindings.rs b/rust/qemu-api/src/bindings.rs
index 525f136ae2..526bcf8e31 100644
--- a/rust/qemu-api/src/bindings.rs
+++ b/rust/qemu-api/src/bindings.rs
@@ -20,6 +20,7 @@
//! `bindgen`-generated declarations.
+use chardev::bindings::Chardev;
use common::Zeroable;
use migration::bindings::VMStateDescription;
use qom::bindings::ObjectClass;
@@ -31,13 +32,6 @@
#[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 {}
-
// SAFETY: this is a pure data struct
unsafe impl Send for CoalescedMemoryRange {}
unsafe impl Sync for CoalescedMemoryRange {}
@@ -59,4 +53,3 @@ unsafe impl Zeroable for
crate::bindings::MemoryRegionOps__bindgen_ty_1 {}
unsafe impl Zeroable for crate::bindings::MemoryRegionOps__bindgen_ty_2 {}
unsafe impl Zeroable for crate::bindings::MemoryRegionOps {}
unsafe impl Zeroable for crate::bindings::MemTxAttrs {}
-unsafe impl Zeroable for crate::bindings::CharBackend {}
diff --git a/rust/qemu-api/src/lib.rs b/rust/qemu-api/src/lib.rs
index f9551c13a5..712116b585 100644
--- a/rust/qemu-api/src/lib.rs
+++ b/rust/qemu-api/src/lib.rs
@@ -13,7 +13,6 @@
#[rustfmt::skip]
pub mod prelude;
-pub mod chardev;
pub mod irq;
pub mod memory;
pub mod qdev;
diff --git a/rust/qemu-api/src/qdev.rs b/rust/qemu-api/src/qdev.rs
index a94af90bb1..98d8593ca5 100644
--- a/rust/qemu-api/src/qdev.rs
+++ b/rust/qemu-api/src/qdev.rs
@@ -10,6 +10,7 @@
};
pub use bindings::{ClockEvent, DeviceClass, Property, ResetType};
+use chardev::Chardev;
use common::{callbacks::FnCall, Opaque};
use migration::vmstate::VMStateDescription;
use qom::{
@@ -20,7 +21,6 @@
use crate::{
bindings::{self, qdev_init_gpio_in, qdev_init_gpio_out, ResettableClass},
- chardev::Chardev,
irq::InterruptSource,
};
--
2.50.1
