arm64: Restrict Rust support to little endian only.

JamieCunliffe · fbq · commit 150e995eb6df · 2023-08-21T08:43:47.000-07:00
Signed-off-by: Jamie Cunliffe <Jamie.Cunliffe@arm.com> Link: https://lore.kernel.org/r/20230606145606.1153715-4-Jamie.Cunliffe@arm.com
diff --git a/Documentation/rust/arch-support.rst b/Documentation/rust/arch-support.rst
@@ -15,7 +15,7 @@ support corresponds to ``S`` values in the ``MAINTAINERS`` file.
 ============  ================  ==============================================
 Architecture  Level of support  Constraints
 ============  ================  ==============================================
-``arm64``     Maintained        None.
+``arm64``     Maintained        Little Endian only.
 ``um``        Maintained        ``x86_64`` only.
 ``x86``       Maintained        ``x86_64`` only.
 ============  ================  ==============================================
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
@@ -225,7 +225,7 @@ config ARM64
 	select HAVE_FUNCTION_ARG_ACCESS_API
 	select MMU_GATHER_RCU_TABLE_FREE
 	select HAVE_RSEQ
-	select HAVE_RUST
+	select HAVE_RUST if CPU_LITTLE_ENDIAN
 	select HAVE_STACKPROTECTOR
 	select HAVE_SYSCALL_TRACEPOINTS
 	select HAVE_KPROBES
