From 6ffe9923f2350c19b95a2c9ebf1b4f5f275986f2 Mon Sep 17 00:00:00 2001 From: Will Deacon Date: Mon, 22 Aug 2016 11:58:36 +0100 Subject: arm64: errata: Pass --fix-cortex-a53-843419 to ld if workaround enabled Cortex-A53 erratum 843419 is worked around by the linker, although it is a configure-time option to GCC as to whether ld is actually asked to apply the workaround or not. This patch ensures that we pass --fix-cortex-a53-843419 to the linker when both CONFIG_ARM64_ERRATUM_843419=y and the linker supports the option. Acked-by: Ard Biesheuvel Signed-off-by: Will Deacon --- arch/arm64/Makefile | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'arch/arm64/Makefile') diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile index 5b54f8c021d8..0b53c752f23f 100644 --- a/arch/arm64/Makefile +++ b/arch/arm64/Makefile @@ -18,6 +18,14 @@ ifneq ($(CONFIG_RELOCATABLE),) LDFLAGS_vmlinux += -pie -Bsymbolic endif +ifeq ($(CONFIG_ARM64_ERRATUM_843419),y) + ifeq ($(call ld-option, --fix-cortex-a53-843419),) +$(warning ld does not support --fix-cortex-a53-843419; kernel may be susceptible to erratum) + else +LDFLAGS_vmlinux += --fix-cortex-a53-843419 + endif +endif + KBUILD_DEFCONFIG := defconfig # Check for binutils support for specific extensions -- cgit v1.2.3