[PATCH V17 0/8] Rust Support for powerpc

["Mukesh Kumar Chaurasiya (IBM)" <mkchauras@gmail.com>]

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
- pseries P11 hardware
- pseries(9, 10) qemu
- powernv(9, 10) qemu
- rustdoc on x86 and powerpc64le
- rusttest on x86 and powerpc64le

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:
V16 -> V17:
- Rebased to latest v7.2-rc2 

V15 -> V16:
- Rebased to latest v7.1-rc4
V15: https://lore.kernel.org/all/20260426105932.2270364-1-mkchauras@gmail.com/

V14 -> V15:
- Fix an issue with rustdoc build on ppc64le
V14: https://lore.kernel.org/all/20260426085725.2090827-1-mkchauras@gmail.com/

V13 -> V14:
- 2nd patch is rewritten (Christian)
- Fixed a small typo in rust/Makefile (Sashiko)
- Fixed commit message in Patch 4 (Sashiko)
V13: https://lore.kernel.org/all/20260424054742.45832-1-mkchauras@gmail.com/

V12 -> V13:
- Added a patch for fixing build issue on ppc32 by Link Mauve
- Added another patch to fix a build issue in dma-buf
- Added another patch to enforce minimum `rustc` version for powerpc
V12: https://lore.kernel.org/all/20260421120958.190430-1-mkchauras@gmail.com/

V11 -> V12:
- Rebased to mainline (rust/Makefile conflict resolved)
V11: https://lore.kernel.org/all/20260417152253.2312961-1-mkchauras@gmail.com/

V10 -> V11:
- Updated `rust/Makefile`
- Not all libraries are move to `rust/host` directory now. Only
  proc_macro2, quote and syn are moved
- Special handling for pin init is added. Details in commit
- Removed mkdir for `rust/host`, this is now handled by toolchain.
V10: https://lore.kernel.org/all/20260406200149.3727922-1-mkchauras@gmail.com/

V9 -> V10:
- rust/Makefile updated with review comments from Miguel
- Patch 1/4 updated with commit message and subject
V9: https://lore.kernel.org/all/20260404121610.1956528-1-mkchauras@gmail.com/

V8 -> V9:
- rust/Makefile updated with a directory instead of abspath
V8: https://lore.kernel.org/all/20260403145308.1042622-1-mkchauras@gmail.com/

V7 -> V8:
- rust/Makefile updated to separate host libraries from target
V7: https://lore.kernel.org/all/20260329160254.2592207-1-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
V1: https://lore.kernel.org/all/20260204042417.83903-1-mkchauras@gmail.com 

Link Mauve (2):
  rust: Make __udivdi3() and __umoddi3() panic
  rust: Add PowerPC support

Mukesh Kumar Chaurasiya (IBM) (6):
  powerpc/syscall: Fix syscall skip handling for seccomp and ptrace
  rust: Fix "multiple candidates for rmeta dependency core" error
  dma-resv: Fix undefined symbol when CONFIG_DMA_SHARED_BUFFER is
    disabled
  powerpc/jump_label: adjust inline asm to be consistent
  rust/powerpc: Set min rustc version for powerpc
  powerpc: Enable Rust for ppc64le

 arch/powerpc/Kconfig                   |  2 +
 arch/powerpc/Makefile                  |  7 ++++
 arch/powerpc/include/asm/jump_label.h  | 23 ++++++-----
 arch/powerpc/include/asm/ptrace.h      | 22 +++++++++-
 arch/powerpc/include/asm/syscall.h     |  6 +++
 arch/powerpc/include/uapi/asm/ptrace.h |  6 ++-
 arch/powerpc/kernel/ptrace/ptrace.c    |  2 +
 arch/powerpc/kernel/syscall.c          | 18 +++++++++
 rust/Makefile                          | 56 +++++++++++++++++---------
 rust/compiler_builtins.rs              |  6 +++
 rust/helpers/helpers.c                 |  2 +
 scripts/min-tool-version.sh            |  2 +
 12 files changed, 119 insertions(+), 33 deletions(-)

-- 
2.55.0