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Thu, 05 Feb 2026 10:05:01 -0800 (PST) From: "Mukesh Kumar Chaurasiya (IBM)" To: linkmauve@linkmauve.fr, ojeda@kernel.org, boqun.feng@gmail.com, gary@garyguo.net, bjorn3_gh@protonmail.com, lossin@kernel.org, a.hindborg@kernel.org, aliceryhl@google.com, tmgross@umich.edu, dakr@kernel.org, corbet@lwn.net, maddy@linux.ibm.com, mpe@ellerman.id.au, npiggin@gmail.com, chleroy@kernel.org, peterz@infradead.org, jpoimboe@kernel.org, jbaron@akamai.com, rostedt@goodmis.org, ardb@kernel.org, rust-for-linux@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Cc: "Mukesh Kumar Chaurasiya (IBM)" Subject: [PATCH V3 2/3] rust: Add PowerPC support Date: Thu, 5 Feb 2026 23:34:28 +0530 Message-ID: <20260205180429.3280657-3-mkchauras@gmail.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260205180429.3280657-1-mkchauras@gmail.com> References: <20260205180429.3280657-1-mkchauras@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable From: Link Mauve 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=E2=80=99t the only ones required to get the kernel to co= mpile 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 Signed-off-by: Mukesh Kumar Chaurasiya (IBM) --- Documentation/rust/arch-support.rst | 1 + arch/powerpc/Kconfig | 1 + arch/powerpc/Makefile | 2 ++ rust/Makefile | 4 +++- 4 files changed, 7 insertions(+), 1 deletion(-) diff --git a/Documentation/rust/arch-support.rst b/Documentation/rust/arch-= support.rst index 6e6a515d0899..e26a94808e97 100644 --- a/Documentation/rust/arch-support.rst +++ b/Documentation/rust/arch-support.rst @@ -18,6 +18,7 @@ Architecture Level of support Constraints ``arm`` Maintained ARMv7 Little Endian only. ``arm64`` Maintained Little Endian only. ``loongarch`` Maintained \- +``powerpc`` Experimental 32-bit Big Endian only. ``riscv`` Maintained ``riscv64`` and LLVM/Clang only. ``um`` Maintained \- ``x86`` Maintained ``x86_64`` only. diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 9537a61ebae0..17db23b82e91 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -283,6 +283,7 @@ 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..9fd82c75dcbd 100644 --- a/arch/powerpc/Makefile +++ b/arch/powerpc/Makefile @@ -61,6 +61,8 @@ else KBUILD_LDFLAGS_MODULE +=3D $(objtree)/arch/powerpc/lib/crtsavres.o endif =20 +KBUILD_RUSTFLAGS +=3D --target=3Dpowerpc-unknown-linux-gnu + ifdef CONFIG_CPU_LITTLE_ENDIAN KBUILD_CPPFLAGS +=3D -mlittle-endian KBUILD_LDFLAGS +=3D -EL diff --git a/rust/Makefile b/rust/Makefile index 4dcc2eff51cb..ae22f2c5f0b3 100644 --- a/rust/Makefile +++ b/rust/Makefile @@ -384,13 +384,15 @@ bindgen_skip_c_flags :=3D -mno-fp-ret-in-387 -mprefer= red-stack-boundary=3D% \ -fstrict-flex-arrays=3D% -fmin-function-alignment=3D% \ -fzero-init-padding-bits=3D% -mno-fdpic \ -fdiagnostics-show-context -fdiagnostics-show-context=3D% \ - --param=3D% --param asan-% -fno-isolate-erroneous-paths-dereference + --param=3D% --param asan-% -fno-isolate-erroneous-paths-dereference \ + -ffixed-r2 -mmultiple -mno-readonly-in-sdata =20 # Derived from `scripts/Makefile.clang`. BINDGEN_TARGET_x86 :=3D x86_64-linux-gnu BINDGEN_TARGET_arm64 :=3D aarch64-linux-gnu BINDGEN_TARGET_arm :=3D arm-linux-gnueabi BINDGEN_TARGET_loongarch :=3D loongarch64-linux-gnusf +BINDGEN_TARGET_powerpc :=3D powerpc-linux-gnu BINDGEN_TARGET_um :=3D $(BINDGEN_TARGET_$(SUBARCH)) BINDGEN_TARGET :=3D $(BINDGEN_TARGET_$(SRCARCH)) =20 --=20 2.52.0