Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / firmware / efi / libstub / Makefile

diff --git a/kernel/drivers/firmware/efi/libstub/Makefile b/kernel/drivers/firmware/efi/libstub/Makefile
new file mode 100644 (file)
index 0000000..280bc0a
--- /dev/null
+++ b/kernel/drivers/firmware/efi/libstub/Makefile
@@ -0,0 +1,41 @@
+#
+# 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) \
+                                  $(call cc-option,-fno-stack-protector)
+
+GCOV_PROFILE                   := n
+KASAN_SANITIZE                 := n
+
+lib-y                          := efi-stub-helper.o
+lib-$(CONFIG_EFI_ARMSTUB)      += arm-stub.o fdt.o
+
+CFLAGS_fdt.o                   += -I$(srctree)/scripts/dtc/libfdt/
+
+#
+# arm64 puts the stub in the kernel proper, which will unnecessarily retain all
+# code indefinitely unless it is annotated as __init/__initdata/__initconst etc.
+# So let's apply the __init annotations at the section level, by prefixing
+# the section names directly. This will ensure that even all the inline string
+# literals are covered.
+#
+extra-$(CONFIG_ARM64)          := $(lib-y)
+lib-$(CONFIG_ARM64)            := $(patsubst %.o,%.init.o,$(lib-y))
+
+OBJCOPYFLAGS := --prefix-alloc-sections=.init
+$(obj)/%.init.o: $(obj)/%.o FORCE
+       $(call if_changed,objcopy)