首先，需要搭建rust编译开发环境
1. 安装rustup
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
2. 配置环境变量
source /root/.cargo/env
3. 安装bindgen
bindgen 是一个自动为 Rust 生成 FFI（Foreign Function Interface）绑定的工具，它能够处理 C 及部分 C++ 库。通过分析给定的头文件，bindgen 创建 Rust 代码，允许你在 Rust 项目中无缝地调用这些外部库的函数并使用其数据类型。例如，当提供一个 C 语言的头文件时，bindgen 能生成对应的 Rust 结构体和函数声明，使得 Rust 开发者可以轻松集成跨语言的库。执行：
cargo install bindgen
报错：
Updating crates.io index
Downloaded bindgen v0.72.0
Downloaded 1 crate (240.3KiB) in 0.80s
error: there is nothing to install in `bindgen v0.72.0`, because it has no binaries
`cargo install` is only for installing programs, and can't be used with libraries.
To use a library crate, add it as a dependency to a Cargo project with `cargo add`.
解决方法：使用cargo install bindgen-cli
4. 下载Linux源码
git clone https://github.com/Rust-for-Linux/linux -b rust-dev
如果速度较慢，可以使用国内的镜像源
git clone https://gitcode.com/gh_mirrors/linu/linux.git -b rust-dev
5. 检查房当前Linux环境是否支持rust
源码的根目录下执行：
make LLVM=1 rustavailable
报错：
*** libclang (used by the Rust bindings generator 'bindgen') is too old.
*** Your version: 10.0.0
*** Minimum version: 13.0.1
*** Please see Documentation/rust/quick-start.rst for details
*** on how to set up the Rust support.
make[1]: *** [/home/wenxu/share/source_code/linux/Makefile:1736: rustavailable] Error 1
make: *** [Makefile:224: __sub-make] Error 2
原因是libclang版本过低，需要安装高版本的clang，执行
apt-get install wget curl gnupg
curl -sSL https://apt.llvm.org/llvm.sh | bash
apt install -y clang-18 llvm-18 lld-18 libclang-18-dev llvm-18-dev clangd-18
好像执行了apt-get install wget curl gnupg
curl -sSL https://apt.llvm.org/llvm.sh | bash
后，就安装了最新的clang-19了，也就是可以不用再安装clang-18
安装高版本的clang后，执行：
update-alternatives --install /usr/bin/clang clang /usr/bin/clang-19 190 \
> --slave /usr/bin/clang++ clang++ /usr/bin/clang++-19 \
> --slave /usr/bin/clang-cpp clang-cpp /usr/bin/clang-cpp-19
update-alternatives --install /usr/bin/ld.lld ld.lld /usr/bin/ld.lld-19 190
这样clang默认就会选择高版本的clang-19
以上步骤都结束后，再执行make LLVM=1 rustavailable，显示：
Rust is available!
表示支持rust了。
6. 执行编译内核
make ARCH=arm64 LLVM=1 O=build defconfig
make ARCH=arm64 LLVM=1 O=build menuconfig
进入到可视化界面，选择General setup -------> Rust Support，点击空格选择，然后save保存。
如果想将rust sample的代码编译进内核，则在开启Rust Support后，再次进入config的可视化界面，找到Kernel hacking -------> Sample kernel code -------> Rust samples，空格选择对应的模块即可。
执行编译：
cd build && make ARCH=arm64 LLVM=1 -j8
生成build/arch/arm64/boot/Image，如果使用qemu模拟运行的时候，在运行阶段显示以下内容：
[ 1.368729] rust_minimal: Rust minimal sample (init)
[ 1.368986] rust_minimal: Am I built-in? true
[ 1.369582] rust_print: Rust printing macros sample (init)
[ 1.369721] rust_print: Emergency message (level 0) without args
[ 1.369856] rust_print: Alert message (level 1) without args
[ 1.369981] rust_print: Critical message (level 2) without args
[ 1.370111] rust_print: Error message (level 3) without args
[ 1.370237] rust_print: Warning message (level 4) without args
[ 1.370362] rust_print: Notice message (level 5) without args
[ 1.370486] rust_print: Info message (level 6) without args
[ 1.370609] rust_print: A line that is continued without args
[ 1.371208] rust_print: Emergency message (level 0) with args
[ 1.371341] rust_print: Alert message (level 1) with args
[ 1.371464] rust_print: Critical message (level 2) with args
[ 1.371594] rust_print: Error message (level 3) with args
[ 1.371717] rust_print: Warning message (level 4) with args
[ 1.371841] rust_print: Notice message (level 5) with args
[ 1.371967] rust_print: Info message (level 6) with args
[ 1.372131] rust_print: A line that is continued with args
[ 1.372349] rust_print: 1
[ 1.372526] rust_print: "hello, world"
[ 1.372822] rust_print: [../samples/rust/rust_print.rs:35:5] c = "hello, world"
[ 1.373200] rust_print: "hello, world"
表示rust正常在内核中运行！
