[PATCH V7 4/4] powerpc: Enable Rust for ppc64le
From: Mukesh Kumar Chaurasiya (IBM)
Date: Sun Mar 29 2026 - 12:04:57 EST
Enabling rust support for ppc64le only.
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 <linkmauve@xxxxxxxxxxxx>
Tested-by: Link Mauve <linkmauve@xxxxxxxxxxxx>
Reviewed-by: Christophe Leroy (CS GROUP) <chleroy@xxxxxxxxxx>
Tested-by: Venkat Rao Bagalkote <venkat88@xxxxxxxxxxxxx>
Signed-off-by: Mukesh Kumar Chaurasiya (IBM) <mkchauras@xxxxxxxxx>
---
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
+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))
--
2.53.0