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LoongArch: Enable initial Rust support 

Enable initial Rust support for LoongArch.

Tested-by: Miguel Ojeda <ojeda@kernel.org>
Signed-off-by: WANG Rui <wangrui@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
This commit is contained in:
WANG Rui 2024-01-17 12:43:00 +08:00 committed by Huacai Chen
parent f58b0abae8
commit 90868ff9ca
4 changed files with 18 additions and 6 deletions
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13
Documentation/rust/arch-support.rst
View File

@ -12,10 +12,11 @@ which uses ``libclang``.
Below is a general summary of architectures that currently work. Level of
support corresponds to ``S`` values in the ``MAINTAINERS`` file.
============ ================ ==============================================
Architecture Level of support Constraints
============ ================ ==============================================
``um`` Maintained ``x86_64`` only.
``x86`` Maintained ``x86_64`` only.
============ ================ ==============================================
============= ================ ==============================================
Architecture Level of support Constraints
============= ================ ==============================================
``loongarch`` Maintained -
``um`` Maintained ``x86_64`` only.
``x86`` Maintained ``x86_64`` only.
============= ================ ==============================================

1
arch/loongarch/Kconfig
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@ -140,6 +140,7 @@ config LOONGARCH
select HAVE_REGS_AND_STACK_ACCESS_API
select HAVE_RETHOOK
select HAVE_RSEQ
select HAVE_RUST
select HAVE_SAMPLE_FTRACE_DIRECT
select HAVE_SAMPLE_FTRACE_DIRECT_MULTI
select HAVE_SETUP_PER_CPU_AREA if NUMA

3
arch/loongarch/Makefile
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@ -81,8 +81,11 @@ KBUILD_AFLAGS_MODULE += -Wa,-mla-global-with-abs
KBUILD_CFLAGS_MODULE += -fplt -Wa,-mla-global-with-abs,-mla-local-with-abs
endif
KBUILD_RUSTFLAGS_MODULE += -Crelocation-model=pic
ifeq ($(CONFIG_RELOCATABLE),y)
KBUILD_CFLAGS_KERNEL += -fPIE
KBUILD_RUSTFLAGS_KERNEL += -Crelocation-model=pie
LDFLAGS_vmlinux += -static -pie --no-dynamic-linker -z notext $(call ld-option, --apply-dynamic-relocs)
endif

7
scripts/generate_rust_target.rs
View File

@ -161,6 +161,13 @@ fn main() {
ts.push("features", features);
ts.push("llvm-target", "x86_64-linux-gnu");
ts.push("target-pointer-width", "64");
} else if cfg.has("LOONGARCH") {
ts.push("arch", "loongarch64");
ts.push("data-layout", "e-m:e-p:64:64-i64:64-i128:128-n64-S128");
ts.push("features", "-f,-d");
ts.push("llvm-target", "loongarch64-linux-gnusf");
ts.push("llvm-abiname", "lp64s");
ts.push("target-pointer-width", "64");
} else {
panic!("Unsupported architecture");
}