On Sun Mar 29, 2026 at 5:02 PM BST, Mukesh Kumar Chaurasiya (IBM) wrote: > Enabling rust support for ppc64le only.
This line looks inaccurate now given previous commit just enabled it for PPC32 too. > > Tested on powernv9: > > $ uname -rm > 6.19.0-rc8+ ppc64le > > $ sudo modprobe rust_minimal > [ 632.890850] rust_minimal: Rust minimal sample (init) > [ 632.890881] rust_minimal: Am I built-in? false > [ 632.890898] rust_minimal: test_parameter: 1 > > $ sudo rmmod rust_minimal > [ 648.272832] rust_minimal: My numbers are [72, 108, 200] > [ 648.272873] rust_minimal: Rust minimal sample (exit) > > $ sudo modprobe rust_print > [ 843.410391] rust_print: Rust printing macros sample (init) > [ 843.410424] rust_print: Emergency message (level 0) without args > [ 843.410451] rust_print: Alert message (level 1) without args > [ 843.410477] rust_print: Critical message (level 2) without args > [ 843.410503] rust_print: Error message (level 3) without args > [ 843.410530] rust_print: Warning message (level 4) without args > [ 843.410557] rust_print: Notice message (level 5) without args > [ 843.410594] rust_print: Info message (level 6) without args > [ 843.410617] rust_print: A line that is continued without args > [ 843.410646] rust_print: Emergency message (level 0) with args > [ 843.410675] rust_print: Alert message (level 1) with args > [ 843.410691] rust_print: Critical message (level 2) with args > [ 843.410727] rust_print: Error message (level 3) with args > [ 843.410761] rust_print: Warning message (level 4) with args > [ 843.410796] rust_print: Notice message (level 5) with args > [ 843.410821] rust_print: Info message (level 6) with args > [ 843.410854] rust_print: A line that is continued with args > [ 843.410892] rust_print: 1 > [ 843.410895] rust_print: "hello, world" > [ 843.410924] rust_print: [samples/rust/rust_print_main.rs:35:5] c = "hello, > world" > [ 843.410977] rust_print: Arc<dyn Display> says 42 > [ 843.410979] rust_print: Arc<dyn Display> says hello, world > > $ sudo rmmod rust_print > [ 843.411003] rust_print: "hello, world" > [ 888.499935] rust_print: Rust printing macros sample (exit) > > Reviewed-by: Link Mauve <[email protected]> > Tested-by: Link Mauve <[email protected]> > Reviewed-by: Christophe Leroy (CS GROUP) <[email protected]> > Tested-by: Venkat Rao Bagalkote <[email protected]> > Signed-off-by: Mukesh Kumar Chaurasiya (IBM) <[email protected]> > --- > arch/powerpc/Kconfig | 1 + > arch/powerpc/Makefile | 7 ++++++- > rust/Makefile | 6 ++++++ > 3 files changed, 13 insertions(+), 1 deletion(-) > > diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig > index 1246b3add8ff..a5f50434daf3 100644 > --- a/arch/powerpc/Kconfig > +++ b/arch/powerpc/Kconfig > @@ -285,6 +285,7 @@ config PPC > select HAVE_RELIABLE_STACKTRACE > select HAVE_RSEQ > select HAVE_RUST if PPC32 > + select HAVE_RUST if PPC64 && CPU_LITTLE_ENDIAN > select HAVE_SAMPLE_FTRACE_DIRECT if > HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS > select HAVE_SAMPLE_FTRACE_DIRECT_MULTI if > HAVE_DYNAMIC_FTRACE_WITH_DIRECT_CALLS > select HAVE_SETUP_PER_CPU_AREA if PPC64 > diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile > index 589613eaa5dc..9385db478c59 100644 > --- a/arch/powerpc/Makefile > +++ b/arch/powerpc/Makefile > @@ -61,7 +61,12 @@ else > KBUILD_LDFLAGS_MODULE += $(objtree)/arch/powerpc/lib/crtsavres.o > endif > > -KBUILD_RUSTFLAGS += --target=powerpc-unknown-linux-gnu > +ifdef CONFIG_PPC64 > +KBUILD_RUSTFLAGS += --target=powerpc64le-unknown-linux-gnu It looks like all it takes to enable PPC BE is to have #ifdef CONFIG_CPU_LITTLE_ENDIAN KBUILD_RUSTFLAGS += --target=powerpc64le-unknown-linux-gnu #else KBUILD_RUSTFLAGS += --target=powerpc64-unknown-linux-gnu #endif (and similarly add bindgen target)? I think it might worth having PPC32/PPC64/PPC64LE all enabled in a single commit, and then you can just claim Rust is enabled for PPC and have an unconditional select HAVE_RUST Thoughts? Best, Gary > +KBUILD_RUSTFLAGS += -Ctarget-feature=-mma,-vsx,-hard-float,-altivec > +else > +KBUILD_RUSTFLAGS += --target=powerpc-unknown-linux-gnu > +endif > > ifdef CONFIG_CPU_LITTLE_ENDIAN > KBUILD_CPPFLAGS += -mlittle-endian > diff --git a/rust/Makefile b/rust/Makefile > index 7ea7570e3f17..7fe4cbbd176e 100644 > --- a/rust/Makefile > +++ b/rust/Makefile > @@ -410,7 +410,13 @@ BINDGEN_TARGET_x86 := x86_64-linux-gnu > BINDGEN_TARGET_arm64 := aarch64-linux-gnu > BINDGEN_TARGET_arm := arm-linux-gnueabi > BINDGEN_TARGET_loongarch := loongarch64-linux-gnusf > + > +ifdef CONFIG_PPC64 > +BINDGEN_TARGET_powerpc := powerpc64le-linux-gnu > +else > BINDGEN_TARGET_powerpc := powerpc-linux-gnu > +endif > + > BINDGEN_TARGET_um := $(BINDGEN_TARGET_$(SUBARCH)) > BINDGEN_TARGET := $(BINDGEN_TARGET_$(SRCARCH)) >
