[PATCH v2 0/3] RISC-V: enable rust

[Conor Dooley]

From: Conor Dooley <conor.dooley at microchip.com>

Now with a patch to disable RUST if CFI_CLANG is enabled.
I've also intentionally not turned on the gcc support, as discussed on
v1.

As this was lifted from the state of the Rust-for-Linux tree, the commit
messages from there cannot be preserved, so these patches have commit
messages that I wrote.

I've tested this on Icicle, and the modules seem to work as expected.
Unfortunately there appear to be implicit 32-bit divisions (or similar)
in core Rust code, so, as in the downstream Rust-for-Linux tree, Rust is
only enabled for 64-bit.

Thanks,
Conor.

Changes in v2:
- Rebase, since a good bit of time has passed!
- Add the extra patch, disabling when CFI_CLANG is enabled.

Changes in v1:
- rebase on v6.3-rc1
- resort the `um` entry in the arch-support table while adding RISC-V
  to it
- drop 32-bit bits
- have another crack at assigning authorship

Changes in RFC-RESEND:
- fix the asymmetrical additions in the Makefile bits
- add cc-cover to my git send-email command...

CC: Miguel Ojeda <ojeda at kernel.org>
CC: Alex Gaynor <alex.gaynor at gmail.com>
CC: Wedson Almeida Filho <wedsonaf at gmail.com>
CC: Boqun Feng <boqun.feng at gmail.com>
CC: Gary Guo <gary at garyguo.net>
CC: Björn Roy Baron <bjorn3_gh at protonmail.com>
CC: Jonathan Corbet <corbet at lwn.net>
CC: Paul Walmsley <paul.walmsley at sifive.com>
CC: Palmer Dabbelt <palmer at dabbelt.com>
CC: Nathan Chancellor <nathan at kernel.org>
CC: Nick Desaulniers <ndesaulniers at google.com>
CC: Tom Rix <trix at redhat.com>
CC: rust-for-linux at vger.kernel.org
CC: linux-doc at vger.kernel.org
CC: linux-kernel at vger.kernel.org
CC: linux-riscv at lists.infradead.org
CC: llvm at lists.linux.dev

Conor Dooley (1):
  rust: make mutually exclusive with CFI_CLANG

Miguel Ojeda (2):
  scripts: generate_rust_target: enable building on RISC-V
  RISC-V: enable building 64-bit kernels with rust support

 Documentation/rust/arch-support.rst |  1 +
 arch/riscv/Kconfig                  |  1 +
 arch/riscv/Makefile                 |  2 ++
 init/Kconfig                        |  1 +
 scripts/generate_rust_target.rs     | 16 ++++++++++++++++
 5 files changed, 21 insertions(+)

-- 
2.43.0