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c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1756217192; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=+OV0h791og2qoAD0Epr7sODfDivVo0B6Xd6wCrSVJks=; b=eObdXm57cxlzoEFzxtwK7kNqyoViFfAR3vfMd3P6hMRIkzyP+I4j7Nd1HvRZwAsSpYaRBk HMk82dduTEcEdm4MngIy2nAbC9o4wDRgjMXyKyQ4s9LYy2v8IDRWH6CyBjsKjOjIIqFfUX iTZVynZ/aFqXc/sx/eTDytUfnXkHIKE= X-MC-Unique: w9XgFepQM0u4WVtWuU66cw-1 X-Mimecast-MFC-AGG-ID: w9XgFepQM0u4WVtWuU66cw_1756217185 From: marcandre.lureau@redhat.com To: qemu-devel@nongnu.org Cc: Paolo Bonzini , =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , qemu-rust@nongnu.org, =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Manos Pitsidianakis Subject: [RFC 16/18] rust/pl011: drop dependency on qemu_api Date: Tue, 26 Aug 2025 18:04:44 +0400 Message-ID: <20250826140449.4190022-17-marcandre.lureau@redhat.com> In-Reply-To: <20250826140449.4190022-1-marcandre.lureau@redhat.com> References: <20250826140449.4190022-1-marcandre.lureau@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=marcandre.lureau@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1756217585696116600 From: Marc-Andr=C3=A9 Lureau Signed-off-by: Marc-Andr=C3=A9 Lureau --- rust/hw/char/pl011/wrapper.h | 51 ++++++++++++++++++++++++++++++ rust/Cargo.lock | 2 -- rust/hw/char/pl011/Cargo.toml | 1 - rust/hw/char/pl011/build.rs | 43 +++++++++++++++++++++++++ rust/hw/char/pl011/meson.build | 27 ++++++++++++++-- rust/hw/char/pl011/src/bindings.rs | 27 ++++++++++++++++ rust/hw/char/pl011/src/device.rs | 2 +- rust/hw/char/pl011/src/lib.rs | 1 + 8 files changed, 148 insertions(+), 6 deletions(-) create mode 100644 rust/hw/char/pl011/wrapper.h create mode 100644 rust/hw/char/pl011/build.rs create mode 100644 rust/hw/char/pl011/src/bindings.rs diff --git a/rust/hw/char/pl011/wrapper.h b/rust/hw/char/pl011/wrapper.h new file mode 100644 index 0000000000..87a5a589c8 --- /dev/null +++ b/rust/hw/char/pl011/wrapper.h @@ -0,0 +1,51 @@ +/* + * QEMU System Emulator + * + * Copyright (c) 2024 Linaro Ltd. + * + * Authors: Manos Pitsidianakis + * + * Permission is hereby granted, free of charge, to any person obtaining a= copy + * of this software and associated documentation files (the "Software"), t= o deal + * in the Software without restriction, including without limitation the r= ights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or se= ll + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included= in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS= OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OT= HER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING= FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS = IN + * THE SOFTWARE. + */ + + +/* + * This header file is meant to be used as input to the `bindgen` applicat= ion + * 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 sym= bols + * 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 "hw/char/pl011.h" diff --git a/rust/Cargo.lock b/rust/Cargo.lock index 9bb2ab5bf6..1a9a36ecec 100644 --- a/rust/Cargo.lock +++ b/rust/Cargo.lock @@ -90,7 +90,6 @@ dependencies =3D [ "common", "hwcore", "migration", - "qemu_api", "qemu_macros", "qom", "system", @@ -147,7 +146,6 @@ dependencies =3D [ "common", "hwcore", "migration", - "qemu_api", "qemu_macros", "qom", "system", diff --git a/rust/hw/char/pl011/Cargo.toml b/rust/hw/char/pl011/Cargo.toml index 9e451fc0aa..285d25c217 100644 --- a/rust/hw/char/pl011/Cargo.toml +++ b/rust/hw/char/pl011/Cargo.toml @@ -24,7 +24,6 @@ qom =3D { path =3D "../../../qom" } chardev =3D { path =3D "../../../chardev" } system =3D { path =3D "../../../system" } hwcore =3D { path =3D "../../../hw/core" } -qemu_api =3D { path =3D "../../../qemu-api" } qemu_macros =3D { path =3D "../../../qemu-macros" } =20 [lints] diff --git a/rust/hw/char/pl011/build.rs b/rust/hw/char/pl011/build.rs new file mode 100644 index 0000000000..721bf2c457 --- /dev/null +++ b/rust/hw/char/pl011/build.rs @@ -0,0 +1,43 @@ +// Copyright 2024, Linaro Limited +// Author(s): Manos Pitsidianakis +// 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 =3D if let Ok(root) =3D env::var("MESON_BUILD_ROOT") { + format!("{root}/rust/hw/char/pl011/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 =3D 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 =3D env::var("OUT_DIR").unwrap(); + let dest_path =3D format!("{out_dir}/bindings.inc.rs"); + let dest_path =3D 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=3Dbuild.rs"); + Ok(()) +} diff --git a/rust/hw/char/pl011/meson.build b/rust/hw/char/pl011/meson.build index 7d90f2aad6..a14993f692 100644 --- a/rust/hw/char/pl011/meson.build +++ b/rust/hw/char/pl011/meson.build @@ -1,6 +1,30 @@ +# TODO: Remove this comment when the clang/libclang mismatch issue is solv= ed. +# +# Rust bindings generation with `bindgen` might fail in some cases where t= he +# 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 +_libpl011_bindings_inc_rs =3D rust.bindgen( + input: 'wrapper.h', + dependencies: common_ss.all_dependencies(), + output: 'bindings.inc.rs', + include_directories: bindings_incdir, + bindgen_version: ['>=3D0.60.0'], + args: bindgen_args_common, +) + _libpl011_rs =3D static_library( 'pl011', - files('src/lib.rs'), + structured_sources( + [ + 'src/lib.rs', + 'src/bindings.rs', + 'src/device.rs', + 'src/registers.rs', + ], + {'.' : _libpl011_bindings_inc_rs}, + ), override_options: ['rust_std=3D2021', 'build.rust_std=3D2021'], rust_abi: 'rust', dependencies: [ @@ -11,7 +35,6 @@ _libpl011_rs =3D static_library( util_rs, migration_rs, bql_rs, - qemu_api, qemu_macros, qom_rs, chardev_rs, diff --git a/rust/hw/char/pl011/src/bindings.rs b/rust/hw/char/pl011/src/bi= ndings.rs new file mode 100644 index 0000000000..bd5ea840cb --- /dev/null +++ b/rust/hw/char/pl011/src/bindings.rs @@ -0,0 +1,27 @@ +// 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 +)] + +//! `bindgen`-generated declarations. + +#[cfg(MESON)] +include!("bindings.inc.rs"); + +#[cfg(not(MESON))] +include!(concat!(env!("OUT_DIR"), "/bindings.inc.rs")); diff --git a/rust/hw/char/pl011/src/device.rs b/rust/hw/char/pl011/src/devi= ce.rs index caaa05c04c..c9f6087540 100644 --- a/rust/hw/char/pl011/src/device.rs +++ b/rust/hw/char/pl011/src/device.rs @@ -137,7 +137,7 @@ pub struct PL011State { // structs, so the size of the Rust version must not be any larger // than the size of the C one. If this assert triggers you need to // expand the padding_for_rust[] array in the C PL011State struct. -static_assert!(size_of::() <=3D size_of::()); +static_assert!(size_of::() <=3D size_of::()); =20 qom_isa!(PL011State : SysBusDevice, DeviceState, Object); =20 diff --git a/rust/hw/char/pl011/src/lib.rs b/rust/hw/char/pl011/src/lib.rs index 2b70d2ff56..0c19b708c0 100644 --- a/rust/hw/char/pl011/src/lib.rs +++ b/rust/hw/char/pl011/src/lib.rs @@ -12,6 +12,7 @@ //! See [`PL011State`](crate::device::PL011State) for the device model typ= e and //! the [`registers`] module for register types. =20 +mod bindings; mod device; mod registers; =20 --=20 2.50.1