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Message-Id: <20240903-mips-rust-v1-1-0fdf0b2fd58f@flygoat.com> Date: Tue, 03 Sep 2024 18:14:34 +0100 From: Jiaxun Yang <jiaxun.yang@...goat.com> To: Masahiro Yamada <masahiroy@...nel.org>, Nathan Chancellor <nathan@...nel.org>, Nicolas Schier <nicolas@...sle.eu>, Richard Weinberger <richard@....at>, Anton Ivanov <anton.ivanov@...bridgegreys.com>, Johannes Berg <johannes@...solutions.net>, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>, Miguel Ojeda <ojeda@...nel.org>, Alex Gaynor <alex.gaynor@...il.com>, Wedson Almeida Filho <wedsonaf@...il.com>, Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>, Björn Roy Baron <bjorn3_gh@...tonmail.com>, Benno Lossin <benno.lossin@...ton.me>, Andreas Hindborg <a.hindborg@...sung.com>, Alice Ryhl <aliceryhl@...gle.com>, Thomas Bogendoerfer <tsbogend@...ha.franken.de>, Steven Rostedt <rostedt@...dmis.org>, Masami Hiramatsu <mhiramat@...nel.org>, Mark Rutland <mark.rutland@....com>, Jonathan Corbet <corbet@....net>, Alex Shi <alexs@...nel.org>, Yanteng Si <siyanteng@...ngson.cn>, Nick Desaulniers <ndesaulniers@...gle.com>, Bill Wendling <morbo@...gle.com>, Justin Stitt <justinstitt@...gle.com> Cc: linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org, linux-um@...ts.infradead.org, rust-for-linux@...r.kernel.org, linux-mips@...r.kernel.org, linux-trace-kernel@...r.kernel.org, linux-doc@...r.kernel.org, llvm@...ts.linux.dev, Jiaxun Yang <jiaxun.yang@...goat.com> Subject: [PATCH 1/3] rust: Introduce HAVE_GENERATE_RUST_TARGET config option scripts/generate_rust_target.rs is used by several architectures to generate target.json target spec file. However the enablement of this feature was controlled by target specific Makefile pieces spreading everywhere. Introduce HAVE_GENERATE_RUST_TARGET config option as a centralized switch to control the per-arch usage of generate_rust_target.rs. Signed-off-by: Jiaxun Yang <jiaxun.yang@...goat.com> --- Makefile | 4 ++++ arch/Kconfig | 8 ++++++++ arch/um/Kconfig | 1 + arch/x86/Makefile | 1 - arch/x86/Makefile.um | 1 - rust/Makefile | 2 +- scripts/Makefile | 4 +--- 7 files changed, 15 insertions(+), 6 deletions(-) diff --git a/Makefile b/Makefile index 2c1db7a6f793..1310e7910fc4 100644 --- a/Makefile +++ b/Makefile @@ -560,6 +560,7 @@ KBUILD_RUSTFLAGS := $(rust_common_flags) \ -Zfunction-sections=n \ -Wclippy::float_arithmetic + KBUILD_AFLAGS_KERNEL := KBUILD_CFLAGS_KERNEL := KBUILD_RUSTFLAGS_KERNEL := @@ -807,6 +808,9 @@ KBUILD_CFLAGS += -Os KBUILD_RUSTFLAGS += -Copt-level=s endif +ifdef CONFIG_HAVE_GENERATE_RUST_TARGET +KBUILD_RUSTFLAGS += --target=$(objtree)/scripts/target.json +endif # Always set `debug-assertions` and `overflow-checks` because their default # depends on `opt-level` and `debug-assertions`, respectively. KBUILD_RUSTFLAGS += -Cdebug-assertions=$(if $(CONFIG_RUST_DEBUG_ASSERTIONS),y,n) diff --git a/arch/Kconfig b/arch/Kconfig index 4e2eaba9e305..eb3ff6cf8501 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -377,6 +377,14 @@ config HAVE_RUST This symbol should be selected by an architecture if it supports Rust. +config HAVE_GENERATE_RUST_TARGET + bool + depends on HAVE_RUST + help + This symbol should be selected by an architecture if it + supports generating Rust target files with + scripts/generate_rust_target.rs. + config HAVE_FUNCTION_ARG_ACCESS_API bool help diff --git a/arch/um/Kconfig b/arch/um/Kconfig index dca84fd6d00a..414e5b01d575 100644 --- a/arch/um/Kconfig +++ b/arch/um/Kconfig @@ -32,6 +32,7 @@ config UML select TTY # Needed for line.c select HAVE_ARCH_VMAP_STACK select HAVE_RUST + select HAVE_GENERATE_RUST_TARGET if X86_32 || X86_64 select ARCH_HAS_UBSAN config MMU diff --git a/arch/x86/Makefile b/arch/x86/Makefile index a1883a30a5d8..cbd707f88a63 100644 --- a/arch/x86/Makefile +++ b/arch/x86/Makefile @@ -75,7 +75,6 @@ export BITS # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53383 # KBUILD_CFLAGS += -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx -KBUILD_RUSTFLAGS += --target=$(objtree)/scripts/target.json KBUILD_RUSTFLAGS += -Ctarget-feature=-sse,-sse2,-sse3,-ssse3,-sse4.1,-sse4.2,-avx,-avx2 # diff --git a/arch/x86/Makefile.um b/arch/x86/Makefile.um index a46b1397ad01..2106a2bd152b 100644 --- a/arch/x86/Makefile.um +++ b/arch/x86/Makefile.um @@ -9,7 +9,6 @@ core-y += arch/x86/crypto/ # ifeq ($(CONFIG_CC_IS_CLANG),y) KBUILD_CFLAGS += -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx -KBUILD_RUSTFLAGS += --target=$(objtree)/scripts/target.json KBUILD_RUSTFLAGS += -Ctarget-feature=-sse,-sse2,-sse3,-ssse3,-sse4.1,-sse4.2,-avx,-avx2 endif diff --git a/rust/Makefile b/rust/Makefile index 99204e33f1dd..fe3640b98011 100644 --- a/rust/Makefile +++ b/rust/Makefile @@ -378,7 +378,7 @@ $(obj)/core.o: private rustc_objcopy = $(foreach sym,$(redirect-intrinsics),--re $(obj)/core.o: private rustc_target_flags = $(core-cfgs) $(obj)/core.o: $(RUST_LIB_SRC)/core/src/lib.rs FORCE +$(call if_changed_rule,rustc_library) -ifneq ($(or $(CONFIG_X86_64),$(CONFIG_X86_32)),) +ifdef CONFIG_HAVE_GENERATE_RUST_TARGET $(obj)/core.o: scripts/target.json endif diff --git a/scripts/Makefile b/scripts/Makefile index dccef663ca82..33258a856a1a 100644 --- a/scripts/Makefile +++ b/scripts/Makefile @@ -12,13 +12,11 @@ hostprogs-always-$(CONFIG_SYSTEM_EXTRA_CERTIFICATE) += insert-sys-cert hostprogs-always-$(CONFIG_RUST_KERNEL_DOCTESTS) += rustdoc_test_builder hostprogs-always-$(CONFIG_RUST_KERNEL_DOCTESTS) += rustdoc_test_gen -ifneq ($(or $(CONFIG_X86_64),$(CONFIG_X86_32)),) -always-$(CONFIG_RUST) += target.json +always-$(CONFIG_HAVE_GENERATE_RUST_TARGET) += target.json filechk_rust_target = $< < include/config/auto.conf $(obj)/target.json: scripts/generate_rust_target include/config/auto.conf FORCE $(call filechk,rust_target) -endif hostprogs += generate_rust_target generate_rust_target-rust := y -- 2.46.0
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