efi_selftest: allow building on ARMv7-M

ARMv7-M only supports the Thumb instruction set. Our current crt0 code does
not support it. With the patch we can build all unit tests of the EFI
subsystem that do not require crt0.
Signed-off-by: NHeinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: NAlexander Graf <agraf@suse.de>

arch/arm/lib/Makefile

@@ -106,5 +106,9 @@ CFLAGS_$(EFI_RELOC) := $(CFLAGS_EFI)
 CFLAGS_REMOVE_$(EFI_RELOC) := $(CFLAGS_NON_EFI)
 
 extra-$(CONFIG_CMD_BOOTEFI_HELLO_COMPILE) += $(EFI_CRT0) $(EFI_RELOC)
-extra-$(CONFIG_CMD_BOOTEFI_SELFTEST) += $(EFI_CRT0) $(EFI_RELOC)
+# TODO: As of v2019.01 the relocation code for the EFI application cannot
+# be built on ARMv7-M.
+ifndef CONFIG_CPU_V7M
+#extra-$(CONFIG_CMD_BOOTEFI_SELFTEST) += $(EFI_CRT0) $(EFI_RELOC)
+endif
 extra-$(CONFIG_EFI) += $(EFI_CRT0) $(EFI_RELOC)

lib/efi_selftest/Makefile

@@ -45,9 +45,9 @@ ifeq ($(CONFIG_BLK)$(CONFIG_PARTITIONS),yy)
 obj-y += efi_selftest_block_device.o
 endif
 
-# TODO: As of v2018.01 the relocation code for the EFI application cannot
-# be built on x86_64.
-ifeq ($(CONFIG_X86_64)$(CONFIG_SANDBOX),)
+# TODO: As of v2019.01 the relocation code for the EFI application cannot
+# be built on ARMv7-M, Sandbox, and x86_64.
+ifeq ($(CONFIG_SANDBOX)$(CONFIG_CPU_V7M)$(CONFIG_X86_64),)
 
 obj-y += \
 efi_selftest_startimage_exit.o \