[PATCH v2 2/3] arm64: rust: Enable PAC support for Rust.

[Jamie Cunliffe]

Enable the PAC ret and BTI options in the Rust build flags to match
the options that are used when building C.

Signed-off-by: Jamie Cunliffe <Jamie.Cunliffe at arm.com>
---
 arch/arm64/Makefile | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index 2ce1555e9fc5..4a2c807d65db 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -67,7 +67,9 @@ endif
 
 ifeq ($(CONFIG_ARM64_BTI_KERNEL),y)
   KBUILD_CFLAGS += -mbranch-protection=pac-ret+bti
+  KBUILD_RUSTFLAGS += -Z branch-protection=bti,pac-ret
 else ifeq ($(CONFIG_ARM64_PTR_AUTH_KERNEL),y)
+  KBUILD_RUSTFLAGS += -Z branch-protection=pac-ret
   ifeq ($(CONFIG_CC_HAS_BRANCH_PROT_PAC_RET),y)
     KBUILD_CFLAGS += -mbranch-protection=pac-ret
   else
-- 
2.30.2