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-rw-r--r--drivers/firmware/efi/Kconfig3
-rw-r--r--drivers/firmware/efi/Makefile1
-rw-r--r--drivers/firmware/efi/libstub/Makefile26
-rw-r--r--drivers/firmware/efi/libstub/arm-stub.c (renamed from drivers/firmware/efi/arm-stub.c)0
-rw-r--r--drivers/firmware/efi/libstub/efi-stub-helper.c (renamed from drivers/firmware/efi/efi-stub-helper.c)0
-rw-r--r--drivers/firmware/efi/libstub/efistub.h (renamed from drivers/firmware/efi/efistub.h)0
-rw-r--r--drivers/firmware/efi/libstub/fdt.c (renamed from drivers/firmware/efi/fdt.c)0
7 files changed, 30 insertions, 0 deletions
diff --git a/drivers/firmware/efi/Kconfig b/drivers/firmware/efi/Kconfig
index 588dc47e7075..f712d47f30d8 100644
--- a/drivers/firmware/efi/Kconfig
+++ b/drivers/firmware/efi/Kconfig
@@ -57,6 +57,9 @@ config EFI_PARAMS_FROM_FDT
config EFI_RUNTIME_WRAPPERS
bool
+config EFI_ARMSTUB
+ bool
+
endmenu
config UEFI_CPER
diff --git a/drivers/firmware/efi/Makefile b/drivers/firmware/efi/Makefile
index e1096539eedb..a204d1474cec 100644
--- a/drivers/firmware/efi/Makefile
+++ b/drivers/firmware/efi/Makefile
@@ -7,3 +7,4 @@ obj-$(CONFIG_EFI_VARS_PSTORE) += efi-pstore.o
obj-$(CONFIG_UEFI_CPER) += cper.o
obj-$(CONFIG_EFI_RUNTIME_MAP) += runtime-map.o
obj-$(CONFIG_EFI_RUNTIME_WRAPPERS) += runtime-wrappers.o
+obj-$(CONFIG_EFI_STUB) += libstub/
diff --git a/drivers/firmware/efi/libstub/Makefile b/drivers/firmware/efi/libstub/Makefile
new file mode 100644
index 000000000000..b14bc2b9fb4d
--- /dev/null
+++ b/drivers/firmware/efi/libstub/Makefile
@@ -0,0 +1,26 @@
+#
+# The stub may be linked into the kernel proper or into a separate boot binary,
+# but in either case, it executes before the kernel does (with MMU disabled) so
+# things like ftrace and stack-protector are likely to cause trouble if left
+# enabled, even if doing so doesn't break the build.
+#
+cflags-$(CONFIG_X86_32) := -march=i386
+cflags-$(CONFIG_X86_64) := -mcmodel=small
+cflags-$(CONFIG_X86) += -m$(BITS) -D__KERNEL__ $(LINUX_INCLUDE) -O2 \
+ -fPIC -fno-strict-aliasing -mno-red-zone \
+ -mno-mmx -mno-sse -DDISABLE_BRANCH_PROFILING
+
+cflags-$(CONFIG_ARM64) := $(subst -pg,,$(KBUILD_CFLAGS))
+cflags-$(CONFIG_ARM) := $(subst -pg,,$(KBUILD_CFLAGS)) \
+ -fno-builtin -fpic -mno-single-pic-base
+
+KBUILD_CFLAGS := $(cflags-y) \
+ $(call cc-option,-ffreestanding) \
+ $(call cc-option,-fno-stack-protector)
+
+GCOV_PROFILE := n
+
+lib-y := efi-stub-helper.o
+lib-$(CONFIG_EFI_ARMSTUB) += arm-stub.o fdt.o
+
+CFLAGS_fdt.o += -I$(srctree)/scripts/dtc/libfdt/
diff --git a/drivers/firmware/efi/arm-stub.c b/drivers/firmware/efi/libstub/arm-stub.c
index 480339b6b110..480339b6b110 100644
--- a/drivers/firmware/efi/arm-stub.c
+++ b/drivers/firmware/efi/libstub/arm-stub.c
diff --git a/drivers/firmware/efi/efi-stub-helper.c b/drivers/firmware/efi/libstub/efi-stub-helper.c
index 32d5cca30f49..32d5cca30f49 100644
--- a/drivers/firmware/efi/efi-stub-helper.c
+++ b/drivers/firmware/efi/libstub/efi-stub-helper.c
diff --git a/drivers/firmware/efi/efistub.h b/drivers/firmware/efi/libstub/efistub.h
index 304ab295ca1a..304ab295ca1a 100644
--- a/drivers/firmware/efi/efistub.h
+++ b/drivers/firmware/efi/libstub/efistub.h
diff --git a/drivers/firmware/efi/fdt.c b/drivers/firmware/efi/libstub/fdt.c
index 86d2934840e2..86d2934840e2 100644
--- a/drivers/firmware/efi/fdt.c
+++ b/drivers/firmware/efi/libstub/fdt.c