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authorChristoph Muellner <christoph.muellner@theobroma-systems.com>2018-03-20 11:16:02 +0100
committerChristoph Muellner <christoph.muellner@theobroma-systems.com>2018-04-05 22:33:45 +0200
commitf08166b6816dea1dff2c18785b104af650382e86 (patch)
tree98edcc6f70442fb4120a01aa296581a9f1ae571a /drivers
parent110b33618f3c55f2af17e4d3f7adbab4c2b81c43 (diff)
arm64: Introduce retpoline for aarch64/arm64.
This patch adds retpoline support for aarch64. This includes: * Kconfig flag CONFIG_RETPOLINE to enable it * testing for required compiler support * generation of external retpoline thunk functions * patches for the arm64 specific assembly code * Enable /sys/devices/system/cpu/vulnerabilities * Add thunk prototypes to asm/asm-prototypes.h Signed-off-by: Christoph Muellner <christoph.muellner@theobroma-systems.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/firmware/efi/libstub/Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/firmware/efi/libstub/Makefile b/drivers/firmware/efi/libstub/Makefile
index adaa4a964f0c..0f67a927b8f1 100644
--- a/drivers/firmware/efi/libstub/Makefile
+++ b/drivers/firmware/efi/libstub/Makefile
@@ -11,7 +11,7 @@ cflags-$(CONFIG_X86) += -m$(BITS) -D__KERNEL__ -O2 \
-fPIC -fno-strict-aliasing -mno-red-zone \
-mno-mmx -mno-sse
-cflags-$(CONFIG_ARM64) := $(subst -pg,,$(KBUILD_CFLAGS)) -fpie
+cflags-$(CONFIG_ARM64) := $(subst -pg,,$(KBUILD_CFLAGS)) -fpie -mindirect-branch=keep
cflags-$(CONFIG_ARM) := $(subst -pg,,$(KBUILD_CFLAGS)) \
-fno-builtin -fpic -mno-single-pic-base