Enable rust for linux by implement generate_rust_target.rs and select relevant Kconfig options. We don't use builtin target as there is no sutiable baremetal target for us that can cover all ISA variants supported by kernel. Link: https://github.com/Rust-for-Linux/linux/issues/107 Signed-off-by: Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx> --- v2: - Add micromips flags - Sync issues with upstream --- Documentation/rust/arch-support.rst | 1 + .../translations/zh_CN/rust/arch-support.rst | 1 + arch/mips/Kconfig | 2 + scripts/generate_rust_target.rs | 68 ++++++++++++++++++++++ 4 files changed, 72 insertions(+) diff --git a/Documentation/rust/arch-support.rst b/Documentation/rust/arch-support.rst index 750ff371570a..ab6c0ae5a407 100644 --- a/Documentation/rust/arch-support.rst +++ b/Documentation/rust/arch-support.rst @@ -17,6 +17,7 @@ Architecture Level of support Constraints ============= ================ ============================================== ``arm64`` Maintained Little Endian only. ``loongarch`` Maintained \- +``mips`` Maintained \- ``riscv`` Maintained ``riscv64`` only. ``um`` Maintained \- ``x86`` Maintained ``x86_64`` only. diff --git a/Documentation/translations/zh_CN/rust/arch-support.rst b/Documentation/translations/zh_CN/rust/arch-support.rst index abd708d48f82..1eaa6c3297ac 100644 --- a/Documentation/translations/zh_CN/rust/arch-support.rst +++ b/Documentation/translations/zh_CN/rust/arch-support.rst @@ -21,6 +21,7 @@ ============= ================ ============================================== ``arm64`` Maintained 只有小端序 ``loongarch`` Maintained \- +``mips`` Maintained \- ``riscv`` Maintained 只有 ``riscv64`` ``um`` Maintained 只有 ``x86_64`` ``x86`` Maintained 只有 ``x86_64`` diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 43da6d596e2b..a91f0a4fd8e9 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -90,6 +90,8 @@ config MIPS select HAVE_PERF_USER_STACK_DUMP select HAVE_REGS_AND_STACK_ACCESS_API select HAVE_RSEQ + select HAVE_RUST + select HAVE_GENERATE_RUST_TARGET select HAVE_SPARSE_SYSCALL_NR select HAVE_STACKPROTECTOR select HAVE_SYSCALL_TRACEPOINTS diff --git a/scripts/generate_rust_target.rs b/scripts/generate_rust_target.rs index 863720777313..bbdf8a4dd169 100644 --- a/scripts/generate_rust_target.rs +++ b/scripts/generate_rust_target.rs @@ -141,6 +141,13 @@ fn has(&self, option: &str) -> bool { let option = "CONFIG_".to_owned() + option; self.0.contains_key(&option) } + + /// Returns the value of the option in the configuration. + /// The argument must be passed without the `CONFIG_` prefix. + fn get(&self, option: &str) -> Option<&String> { + let option = "CONFIG_".to_owned() + option; + self.0.get(&option) + } } fn main() { @@ -203,6 +210,67 @@ fn main() { ts.push("target-pointer-width", "32"); } else if cfg.has("LOONGARCH") { panic!("loongarch uses the builtin rustc loongarch64-unknown-none-softfloat target"); + } else if cfg.has("MIPS") { + let mut features = "+soft-float,+noabicalls".to_string(); + + if cfg.has("CPU_MICROMIPS") { + features += ",+micromips"; + } + + if cfg.has("64BIT") { + ts.push("arch", "mips64"); + ts.push("abi", "abi64"); + cfg.get("TARGET_ISA_REV").map(|isa_rev| { + let feature = match isa_rev.as_str() { + "1" => ",+mips64", + "2" => ",+mips64r2", + "5" => ",+mips64r5", + "6" => ",+mips64r6", + _ => ",+mips3", + }; + features += feature; + }); + + ts.push("features", features); + if cfg.has("CPU_BIG_ENDIAN") { + ts.push( + "data-layout", + "E-m:e-i8:8:32-i16:16:32-i64:64-n32:64-S128", + ); + ts.push("llvm-target", "mips64-unknown-linux-gnuabi64"); + } else { + ts.push( + "data-layout", + "e-m:e-i8:8:32-i16:16:32-i64:64-n32:64-S128", + ); + ts.push("llvm-target", "mips64el-unknown-linux-gnuabi64"); + } + ts.push("target-pointer-width", "64"); + } else { + ts.push("arch", "mips"); + cfg.get("TARGET_ISA_REV").map(|isa_rev| { + let feature = match isa_rev.as_str() { + "1" => ",+mips32", + "2" => ",+mips32r2", + "5" => ",+mips32r5", + "6" => ",+mips32r6", + _ => ",+mips2", + }; + features += feature; + }); + + ts.push("features", features); + if cfg.has("CPU_BIG_ENDIAN") { + ts.push("data-layout", + "E-m:m-p:32:32-i8:8:32-i16:16:32-i64:64-n32-S64"); + ts.push("llvm-target", "mips-unknown-linux-gnu"); + } else { + ts.push("data-layout", + "e-m:m-p:32:32-i8:8:32-i16:16:32-i64:64-n32-S64"); + ts.push("llvm-target", "mipsel-unknown-linux-gnu"); + } + ts.push("target-pointer-width", "32"); + } } else { panic!("Unsupported architecture"); } -- 2.46.0
