c263a4e990
llvm does does not understand -march=z9-109 and older target specifiers, so disable the respective Kconfig settings and the logic to make the boot code work on old systems when building with clang. Part of the early boot code is normally compiled with -march=z900 for maximum compatibility. This also has to get changed with clang to the oldest supported ISA, which is -march=z10 here. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
81 lines
2.6 KiB
Makefile
81 lines
2.6 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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#
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# Makefile for the linux s390-specific parts of the memory manager.
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#
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KCOV_INSTRUMENT := n
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GCOV_PROFILE := n
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UBSAN_SANITIZE := n
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KASAN_SANITIZE := n
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KBUILD_AFLAGS := $(KBUILD_AFLAGS_DECOMPRESSOR)
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KBUILD_CFLAGS := $(KBUILD_CFLAGS_DECOMPRESSOR)
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#
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# Use minimum architecture for als.c to be able to print an error
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# message if the kernel is started on a machine which is too old
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#
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ifndef CONFIG_CC_IS_CLANG
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CC_FLAGS_MARCH_MINIMUM := -march=z900
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else
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CC_FLAGS_MARCH_MINIMUM := -march=z10
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endif
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ifneq ($(CC_FLAGS_MARCH),$(CC_FLAGS_MARCH_MINIMUM))
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AFLAGS_REMOVE_head.o += $(CC_FLAGS_MARCH)
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AFLAGS_head.o += $(CC_FLAGS_MARCH_MINIMUM)
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AFLAGS_REMOVE_mem.o += $(CC_FLAGS_MARCH)
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AFLAGS_mem.o += $(CC_FLAGS_MARCH_MINIMUM)
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CFLAGS_REMOVE_als.o += $(CC_FLAGS_MARCH)
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CFLAGS_als.o += $(CC_FLAGS_MARCH_MINIMUM)
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CFLAGS_REMOVE_sclp_early_core.o += $(CC_FLAGS_MARCH)
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CFLAGS_sclp_early_core.o += $(CC_FLAGS_MARCH_MINIMUM)
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endif
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CFLAGS_sclp_early_core.o += -I$(srctree)/drivers/s390/char
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obj-y := head.o als.o startup.o mem_detect.o ipl_parm.o ipl_report.o
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obj-y += string.o ebcdic.o sclp_early_core.o mem.o ipl_vmparm.o cmdline.o
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obj-y += ctype.o text_dma.o
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obj-$(CONFIG_PROTECTED_VIRTUALIZATION_GUEST) += uv.o
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obj-$(CONFIG_RELOCATABLE) += machine_kexec_reloc.o
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obj-$(CONFIG_RANDOMIZE_BASE) += kaslr.o
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targets := bzImage startup.a section_cmp.boot.data section_cmp.boot.preserved.data $(obj-y)
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subdir- := compressed
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OBJECTS := $(addprefix $(obj)/,$(obj-y))
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quiet_cmd_section_cmp = SECTCMP $*
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define cmd_section_cmp
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s1=`$(OBJDUMP) -t -j "$*" "$<" | sort | \
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sed -n "/0000000000000000/! s/.*\s$*\s\+//p" | sha256sum`; \
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s2=`$(OBJDUMP) -t -j "$*" "$(word 2,$^)" | sort | \
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sed -n "/0000000000000000/! s/.*\s$*\s\+//p" | sha256sum`; \
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if [ "$$s1" != "$$s2" ]; then \
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echo "error: section $* differs between $< and $(word 2,$^)" >&2; \
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exit 1; \
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fi; \
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touch $@
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endef
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OBJCOPYFLAGS_bzImage := --pad-to $$(readelf -s $(obj)/compressed/vmlinux | awk '/\<_end\>/ {print or(strtonum("0x"$$2),4095)+1}')
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$(obj)/bzImage: $(obj)/compressed/vmlinux $(obj)/section_cmp.boot.data $(obj)/section_cmp.boot.preserved.data FORCE
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$(call if_changed,objcopy)
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$(obj)/section_cmp%: vmlinux $(obj)/compressed/vmlinux FORCE
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$(call if_changed,section_cmp)
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$(obj)/compressed/vmlinux: $(obj)/startup.a FORCE
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$(Q)$(MAKE) $(build)=$(obj)/compressed $@
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$(obj)/startup.a: $(OBJECTS) FORCE
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$(call if_changed,ar)
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install: $(CONFIGURE) $(obj)/bzImage
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sh -x $(srctree)/$(obj)/install.sh $(KERNELRELEASE) $(obj)/bzImage \
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System.map "$(INSTALL_PATH)"
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chkbss := $(obj-y)
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chkbss-target := startup.a
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include $(srctree)/arch/s390/scripts/Makefile.chkbss
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