Enable experimental rust support for ppc64le and ppc32be. The patch for
ppc32 has been provided by Link Mauve[1] and ppc64le support[2] has been
merged over it. ppc32 needs some toolchain fixes mentioned in the patch
`rust: Add PowerPC support` and the discussion for that is done here[1].
This has been tested on powernv9 hardware and power10 pseries qemu. I
I request Link to test the ppc32 part as i don't have a hardware to test
it out.
[1] https://lore.kernel.org/all/20260204030507.8203-1-linkmauve@linkmauve.fr
[2] https://lore.kernel.org/all/20260204042417.83903-1-mkchauras@gmail.com
Changelog:
V4 -> V5:
- Removed a nested ifdef from PPC64 for Little endian toolchain
V4: https://lore.kernel.org/all/20260209105456.1551677-1-mkchauras@gmail.com/
V3 -> V4:
- Co-developed-by header added in patch 1
V3: https://lore.kernel.org/all/20260205180429.3280657-1-mkchauras@gmail.com
V2 -> V3:
- Splited HAVE_RUST in 2 lines
- BINDGEN_TARGET_powerpc initialized before assigning the same to
BINDGEN_TARGET
V2: https://lore.kernel.org/all/20260204210125.613350-1-mkchauras@gmail.com
V1 -> V2:
- jump label fix for rust has been moved to a separate patch
- PPC32 support has been taken
- rust support has been marked experimental
- target.json dependency has been removed
- HAVE_RUST now depends on CPU_LITTLE_ENDIAN for PPC64
Link Mauve (1):
rust: Add PowerPC support
Mukesh Kumar Chaurasiya (IBM) (2):
powerpc/jump_label: adjust inline asm to be consistent
powerpc: Enable Rust for ppc64le
Documentation/rust/arch-support.rst | 1 +
arch/powerpc/Kconfig | 2 ++
arch/powerpc/Makefile | 9 +++++++++
arch/powerpc/include/asm/jump_label.h | 23 +++++++++++++----------
rust/Makefile | 10 +++++++++-
5 files changed, 34 insertions(+), 11 deletions(-)
--
2.53.0
Added support for a new macro ARCH_STATIC_BRANCH_ASM in powerpc
to avoid duplication of inline asm between C and Rust. This is
inline with commit aecaf181651c '("jump_label: adjust inline asm to be consistent")'
Co-developed-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Reviewed-by: Christophe Leroy (CS GROUP) <chleroy@kernel.org>
Signed-off-by: Mukesh Kumar Chaurasiya (IBM) <redacted>
---
arch/powerpc/include/asm/jump_label.h | 23 +++++++++++++----------
1 file changed, 13 insertions(+), 10 deletions(-)
From: Link Mauve <redacted>
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 <redacted>
Signed-off-by: Mukesh Kumar Chaurasiya (IBM) <redacted>
---
Documentation/rust/arch-support.rst | 1 +
arch/powerpc/Kconfig | 1 +
arch/powerpc/Makefile | 2 ++
rust/Makefile | 4 +++-
4 files changed, 7 insertions(+), 1 deletion(-)