[v7] Rust support for powerpc

[PATCH V7 0/4] Rust support for powerpc

Posted by Mukesh Kumar Chaurasiya (IBM) 3 days, 6 hours ago

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.

We are actively working with our LLVM team to get the target for ppc,
ppc64 and ppc64le in the rust compiler.


[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:
V6 -> V7:
- Documentation removed as powerpc is still under development
- Added a fix for race condition in rust/Makefile
V6: https://lore.kernel.org/all/20260210090023.2587534-1-mkchauras@gmail.com

V5 -> V6:
- Added a missing Tested by from Venkat which got missed since V3
- Support is marked as Maintained instead of experimental
V5: https://lore.kernel.org/all/20260210053756.2088302-1-mkchauras@gmail.com

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) (3):
  rust: Fix a race condition in Makefile
  powerpc/jump_label: adjust inline asm to be consistent
  powerpc: Enable Rust for ppc64le

 arch/powerpc/Kconfig                  |  2 ++
 arch/powerpc/Makefile                 |  7 +++++++
 arch/powerpc/include/asm/jump_label.h | 23 +++++++++++++----------
 rust/Makefile                         | 13 +++++++++++--
 4 files changed, 33 insertions(+), 12 deletions(-)

-- 
2.53.0

Re: [PATCH V7 0/4] Rust support for powerpc

Posted by Miguel Ojeda 3 days, 6 hours ago

On Sun, Mar 29, 2026 at 6:03 PM Mukesh Kumar Chaurasiya (IBM)
<mkchauras@gmail.com> wrote:
>
> We are actively working with our LLVM team to get the target for ppc,
> ppc64 and ppc64le in the rust compiler.

That sounds great -- I imagine you refer to a `-none` target? Are
there any links to e.g. upstream Rust issues or PRs that could be nice
to add for context, if any?

It may be good to put this in the commit message. Also, other links
that we should add:

Link: https://github.com/Rust-for-Linux/linux/issues/105
Link: https://github.com/linuxppc/issues/issues/451

Thanks!

Cheers,
Miguel

Re: [PATCH V7 0/4] Rust support for powerpc

Posted by Mukesh Kumar Chaurasiya 2 days, 13 hours ago

On Sun, Mar 29, 2026 at 06:20:58PM +0200, Miguel Ojeda wrote:
> On Sun, Mar 29, 2026 at 6:03 PM Mukesh Kumar Chaurasiya (IBM)
> <mkchauras@gmail.com> wrote:
> >
> > We are actively working with our LLVM team to get the target for ppc,
> > ppc64 and ppc64le in the rust compiler.
> 
> That sounds great -- I imagine you refer to a `-none` target? Are
> there any links to e.g. upstream Rust issues or PRs that could be nice
> to add for context, if any?
> 
I couldn't find any as of now. I'll try to fetch em and update
accordingly.
> It may be good to put this in the commit message. Also, other links
> that we should add:
> 
> Link: https://github.com/Rust-for-Linux/linux/issues/105
> Link: https://github.com/linuxppc/issues/issues/451
> 
That sounds great.

> Thanks!
> 
> Cheers,
> Miguel

Regards,
Mukesh