On Tue, Sep 27, 2022 at 03:14:56PM +0200, Miguel Ojeda wrote: > Note that only x86_64 is covered and not all features nor mitigations > are handled, but it is enough as a starting point and showcases > the basics needed to add Rust support for a new architecture. > > Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx> > Co-developed-by: Alex Gaynor <alex.gaynor@xxxxxxxxx> > Signed-off-by: Alex Gaynor <alex.gaynor@xxxxxxxxx> > Co-developed-by: Wedson Almeida Filho <wedsonaf@xxxxxxxxxx> > Signed-off-by: Wedson Almeida Filho <wedsonaf@xxxxxxxxxx> > Co-developed-by: David Gow <davidgow@xxxxxxxxxx> > Signed-off-by: David Gow <davidgow@xxxxxxxxxx> > Signed-off-by: Miguel Ojeda <ojeda@xxxxxxxxxx> > --- > Documentation/rust/arch-support.rst | 1 + > arch/x86/Kconfig | 1 + > arch/x86/Makefile | 10 ++++++++++ > scripts/generate_rust_target.rs | 15 +++++++++++++-- > 4 files changed, 25 insertions(+), 2 deletions(-) > > diff --git a/Documentation/rust/arch-support.rst b/Documentation/rust/arch-support.rst > index 1152e0fbdad0..6982b63775da 100644 > --- a/Documentation/rust/arch-support.rst > +++ b/Documentation/rust/arch-support.rst > @@ -15,4 +15,5 @@ support corresponds to ``S`` values in the ``MAINTAINERS`` file. > ============ ================ ============================================== > Architecture Level of support Constraints > ============ ================ ============================================== > +``x86`` Maintained ``x86_64`` only. > ============ ================ ============================================== > diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig > index f9920f1341c8..3ca198742b10 100644 > --- a/arch/x86/Kconfig > +++ b/arch/x86/Kconfig > @@ -257,6 +257,7 @@ config X86 > select HAVE_STATIC_CALL_INLINE if HAVE_OBJTOOL > select HAVE_PREEMPT_DYNAMIC_CALL > select HAVE_RSEQ > + select HAVE_RUST if X86_64 > select HAVE_SYSCALL_TRACEPOINTS > select HAVE_UACCESS_VALIDATION if HAVE_OBJTOOL > select HAVE_UNSTABLE_SCHED_CLOCK > diff --git a/arch/x86/Makefile b/arch/x86/Makefile > index bafbd905e6e7..2d7e640674c6 100644 > --- a/arch/x86/Makefile > +++ b/arch/x86/Makefile > @@ -68,6 +68,7 @@ export BITS > # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53383 > # > KBUILD_CFLAGS += -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx > +KBUILD_RUSTFLAGS += -Ctarget-feature=-sse,-sse2,-sse3,-ssse3,-sse4.1,-sse4.2,-avx,-avx2 I do wonder how many more things you will need to list here. As far as I can tell there is also other avx512* flags for the x86_64 target. That said, if this works today ... Reviewed-by: Wei Liu <wei.liu@xxxxxxxxxx>
