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| author | Miguel Ojeda <ojeda@kernel.org> | 2024-04-09 19:25:16 +0200 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2024-04-28 23:50:34 +0200 |
| commit | 70a57b247251aabadd67795c3097c0fcc616e533 (patch) | |
| tree | 67d97ccdefffbbf84a4ba3cb750739ac25cba0a5 /Documentation/rust | |
| parent | Merge patch series "Rework & improve riscv cmpxchg.h and atomic.h" (diff) | |
| download | linux-70a57b247251aabadd67795c3097c0fcc616e533.tar.xz linux-70a57b247251aabadd67795c3097c0fcc616e533.zip | |
RISC-V: enable building 64-bit kernels with rust support
The rust modules work on 64-bit RISC-V, with no twiddling required.
Select HAVE_RUST and provide the required flags to kbuild so that the
modules can be used. The Makefile and Kconfig changes are lifted from
work done by Miguel in the Rust-for-Linux tree, hence his authorship.
Following the rabbit hole, the Makefile changes originated in a script,
created based on config files originally added by Gary, hence his
co-authorship.
32-bit is broken in core rust code, so support is limited to 64-bit:
ld.lld: error: undefined symbol: __udivdi3
As 64-bit RISC-V is now supported, add it to the arch support table.
Co-developed-by: Gary Guo <gary@garyguo.net>
Signed-off-by: Gary Guo <gary@garyguo.net>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
Co-developed-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20240409-silencer-book-ce1320f06aab@spud
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'Documentation/rust')
| -rw-r--r-- | Documentation/rust/arch-support.rst | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/Documentation/rust/arch-support.rst b/Documentation/rust/arch-support.rst index 5c4fa9f5d1cd..4d1495ded2aa 100644 --- a/Documentation/rust/arch-support.rst +++ b/Documentation/rust/arch-support.rst @@ -17,6 +17,7 @@ Architecture Level of support Constraints ============= ================ ============================================== ``arm64`` Maintained Little Endian only. ``loongarch`` Maintained - +``riscv`` Maintained ``riscv64`` only. ``um`` Maintained ``x86_64`` only. ``x86`` Maintained ``x86_64`` only. ============= ================ ============================================== |