# \[PATCH v8 12/12\] efi/libstub: disable SCS - From: Sami Tolvanen \ - Date: 2020-02-19 00:09:11 - List: linux-arm-kernel - Page: https://ratatoskr.run/linux-arm-kernel/2020/02/5866890 - Thread: https://ratatoskr.run/linux-arm-kernel/2019/10/5749629/t/5.md ```text Disable SCS for the EFI stub and allow x18 to be used. Suggested-by: James Morse Signed-off-by: Sami Tolvanen --- drivers/firmware/efi/libstub/Makefile | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/firmware/efi/libstub/Makefile b/drivers/firmware/efi/libstub/Makefile index 98a81576213d..dff9fa5a3f1c 100644 --- a/drivers/firmware/efi/libstub/Makefile +++ b/drivers/firmware/efi/libstub/Makefile @@ -30,6 +30,9 @@ KBUILD_CFLAGS := $(cflags-y) -DDISABLE_BRANCH_PROFILING \ $(call cc-option,-fno-stack-protector) \ -D__DISABLE_EXPORTS +# remove SCS flags from all objects in this directory +KBUILD_CFLAGS := $(filter-out -ffixed-x18 $(CC_FLAGS_SCS), $(KBUILD_CFLAGS)) + GCOV_PROFILE := n KASAN_SANITIZE := n UBSAN_SANITIZE := n -- 2.25.0.265.gbab2e86ba0-goog _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel ```