From: "Mukesh Kumar Chaurasiya (IBM)" <mkchauras@gmail.com>
To: maddy@linux.ibm.com, mpe@ellerman.id.au, npiggin@gmail.com,
chleroy@kernel.org, peterz@infradead.org, jpoimboe@kernel.org,
jbaron@akamai.com, aliceryhl@google.com, rostedt@goodmis.org,
ardb@kernel.org, ojeda@kernel.org, boqun@kernel.org,
gary@garyguo.net, bjorn3_gh@protonmail.com, lossin@kernel.org,
a.hindborg@kernel.org, tmgross@umich.edu, dakr@kernel.org,
nathan@kernel.org, nick.desaulniers+lkml@gmail.com,
morbo@google.com, justinstitt@google.com,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
rust-for-linux@vger.kernel.org, llvm@lists.linux.dev
Cc: Link Mauve <linkmauve@linkmauve.fr>,
"Mukesh Kumar Chaurasiya (IBM)" <mkchauras@gmail.com>
Subject: [PATCH V8 3/4] rust: Add PowerPC support
Date: Fri, 3 Apr 2026 20:23:07 +0530 [thread overview]
Message-ID: <20260403145308.1042622-4-mkchauras@gmail.com> (raw)
In-Reply-To: <20260403145308.1042622-1-mkchauras@gmail.com>
From: Link Mauve <linkmauve@linkmauve.fr>
For now only Big Endian 32-bit PowerPC is supported, as that is the only
hardware I have. This has been tested on the Nintendo Wii so far, but I
plan on also using it on the GameCube, Wii U and Apple G4.
These changes aren’t the only ones required to get the kernel to compile
and link on PowerPC, libcore will also have to be changed to not use
integer division to format u64, u128 and core::time::Duration, otherwise
__udivdi3() and __umoddi3() will have to be added. I have tested this
change by replacing the three implementations with unimplemented!() and
it linked just fine.
Signed-off-by: Link Mauve <linkmauve@linkmauve.fr>
Link: https://github.com/Rust-for-Linux/linux/issues/105
Link: https://github.com/linuxppc/issues/issues/451
Signed-off-by: Mukesh Kumar Chaurasiya (IBM) <mkchauras@gmail.com>
---
arch/powerpc/Kconfig | 1 +
arch/powerpc/Makefile | 2 ++
rust/Makefile | 4 +++-
3 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 10240cb80904..1246b3add8ff 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -284,6 +284,7 @@ config PPC
select HAVE_REGS_AND_STACK_ACCESS_API
select HAVE_RELIABLE_STACKTRACE
select HAVE_RSEQ
+ select HAVE_RUST if PPC32
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 a58b1029592c..589613eaa5dc 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -61,6 +61,8 @@ else
KBUILD_LDFLAGS_MODULE += $(objtree)/arch/powerpc/lib/crtsavres.o
endif
+KBUILD_RUSTFLAGS += --target=powerpc-unknown-linux-gnu
+
ifdef CONFIG_CPU_LITTLE_ENDIAN
KBUILD_CPPFLAGS += -mlittle-endian
KBUILD_LDFLAGS += -EL
diff --git a/rust/Makefile b/rust/Makefile
index 762bddc868e4..d05e76df15a8 100644
--- a/rust/Makefile
+++ b/rust/Makefile
@@ -413,13 +413,15 @@ bindgen_skip_c_flags := -mno-fp-ret-in-387 -mpreferred-stack-boundary=% \
-fstrict-flex-arrays=% -fmin-function-alignment=% \
-fzero-init-padding-bits=% -mno-fdpic \
-fdiagnostics-show-context -fdiagnostics-show-context=% \
- --param=% --param asan-% -fno-isolate-erroneous-paths-dereference
+ --param=% --param asan-% -fno-isolate-erroneous-paths-dereference \
+ -ffixed-r2 -mmultiple -mno-readonly-in-sdata
# Derived from `scripts/Makefile.clang`.
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
+BINDGEN_TARGET_powerpc := powerpc-linux-gnu
BINDGEN_TARGET_um := $(BINDGEN_TARGET_$(SUBARCH))
BINDGEN_TARGET := $(BINDGEN_TARGET_$(SRCARCH))
--
2.53.0
next prev parent reply other threads:[~2026-04-03 14:53 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-03 14:53 [PATCH V8 0/4] Rust support for powerpc Mukesh Kumar Chaurasiya (IBM)
2026-04-03 14:53 ` [PATCH V8 1/4] rust: Fix "multiple candidates for rmeta dependency core" error Mukesh Kumar Chaurasiya (IBM)
2026-04-03 15:09 ` Gary Guo
2026-04-04 3:39 ` Mukesh Kumar Chaurasiya
2026-04-04 20:28 ` Miguel Ojeda
2026-04-03 14:53 ` [PATCH V8 2/4] powerpc/jump_label: adjust inline asm to be consistent Mukesh Kumar Chaurasiya (IBM)
2026-04-03 14:53 ` Mukesh Kumar Chaurasiya (IBM) [this message]
2026-04-03 14:53 ` [PATCH V8 4/4] powerpc: Enable Rust for ppc64le Mukesh Kumar Chaurasiya (IBM)
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