1# SPDX-License-Identifier: GPL-2.0 2# 3# Makefile for the linux s390-specific parts of the memory manager. 4# 5 6# Tooling runtimes are unavailable and cannot be linked for early boot code 7KCOV_INSTRUMENT := n 8GCOV_PROFILE := n 9UBSAN_SANITIZE := n 10KASAN_SANITIZE := n 11KCSAN_SANITIZE := n 12KMSAN_SANITIZE := n 13 14KBUILD_AFLAGS := $(KBUILD_AFLAGS_DECOMPRESSOR) 15KBUILD_CFLAGS := $(KBUILD_CFLAGS_DECOMPRESSOR) 16 17# 18# Use minimum architecture for als.c to be able to print an error 19# message if the kernel is started on a machine which is too old 20# 21ifndef CONFIG_CC_IS_CLANG 22CC_FLAGS_MARCH_MINIMUM := -march=z900 23else 24CC_FLAGS_MARCH_MINIMUM := -march=z10 25endif 26 27ifneq ($(CC_FLAGS_MARCH),$(CC_FLAGS_MARCH_MINIMUM)) 28AFLAGS_REMOVE_head.o += $(CC_FLAGS_MARCH) 29AFLAGS_head.o += $(CC_FLAGS_MARCH_MINIMUM) 30AFLAGS_REMOVE_mem.o += $(CC_FLAGS_MARCH) 31AFLAGS_mem.o += $(CC_FLAGS_MARCH_MINIMUM) 32CFLAGS_REMOVE_als.o += $(CC_FLAGS_MARCH) 33CFLAGS_als.o += $(CC_FLAGS_MARCH_MINIMUM) 34CFLAGS_REMOVE_sclp_early_core.o += $(CC_FLAGS_MARCH) 35CFLAGS_sclp_early_core.o += $(CC_FLAGS_MARCH_MINIMUM) 36endif 37 38CFLAGS_sclp_early_core.o += -I$(srctree)/drivers/s390/char 39 40obj-y := head.o als.o startup.o physmem_info.o ipl_parm.o ipl_report.o vmem.o 41obj-y += string.o ebcdic.o sclp_early_core.o mem.o ipl_vmparm.o cmdline.o 42obj-y += version.o pgm_check_info.o ctype.o ipl_data.o relocs.o alternative.o uv.o 43obj-$(CONFIG_RANDOMIZE_BASE) += kaslr.o 44obj-y += $(if $(CONFIG_KERNEL_UNCOMPRESSED),,decompressor.o) info.o 45obj-$(CONFIG_KERNEL_ZSTD) += clz_ctz.o 46obj-$(CONFIG_KMSAN) += kmsan.o 47obj-all := $(obj-y) piggy.o syms.o 48 49targets := bzImage section_cmp.boot.data section_cmp.boot.preserved.data $(obj-y) 50targets += vmlinux.lds vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2 51targets += vmlinux.bin.xz vmlinux.bin.lzma vmlinux.bin.lzo vmlinux.bin.lz4 52targets += vmlinux.bin.zst info.bin syms.bin vmlinux.syms $(obj-all) 53targets += relocs.S 54 55OBJECTS := $(addprefix $(obj)/,$(obj-y)) 56OBJECTS_ALL := $(addprefix $(obj)/,$(obj-all)) 57 58clean-files += vmlinux.map 59 60quiet_cmd_section_cmp = SECTCMP $* 61define cmd_section_cmp 62 s1=`$(OBJDUMP) -t "$<" | grep "\s$*\s\+" | sort | \ 63 sed -n "/0000000000000000/! s/.*\s$*\s\+//p" | sha256sum`; \ 64 s2=`$(OBJDUMP) -t "$(word 2,$^)" | grep "\s$*\s\+" | sort | \ 65 sed -n "/0000000000000000/! s/.*\s$*\s\+//p" | sha256sum`; \ 66 if [ "$$s1" != "$$s2" ]; then \ 67 echo "error: section $* differs between $< and $(word 2,$^)" >&2; \ 68 exit 1; \ 69 fi; \ 70 touch $@ 71endef 72 73$(obj)/bzImage: $(obj)/vmlinux $(obj)/section_cmp.boot.data $(obj)/section_cmp.boot.preserved.data FORCE 74 $(call if_changed,objcopy) 75 76$(obj)/section_cmp%: vmlinux $(obj)/vmlinux FORCE 77 $(call if_changed,section_cmp) 78 79LDFLAGS_vmlinux-$(CONFIG_LD_ORPHAN_WARN) := --orphan-handling=$(CONFIG_LD_ORPHAN_WARN_LEVEL) 80LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y) --oformat $(LD_BFD) -e startup $(if $(CONFIG_VMLINUX_MAP),-Map=$(obj)/vmlinux.map) --build-id=sha1 -T 81$(obj)/vmlinux: $(obj)/vmlinux.lds $(OBJECTS_ALL) FORCE 82 $(call if_changed,ld) 83 84LDFLAGS_vmlinux.syms := $(LDFLAGS_vmlinux-y) --oformat $(LD_BFD) -e startup -T 85$(obj)/vmlinux.syms: $(obj)/vmlinux.lds $(OBJECTS) FORCE 86 $(call if_changed,ld) 87 88quiet_cmd_dumpsyms = DUMPSYMS $< 89define cmd_dumpsyms 90 $(NM) -n -S --format=bsd "$<" | sed -nE 's/^0*([0-9a-fA-F]+) 0*([0-9a-fA-F]+) [tT] ([^ ]*)$$/\1 \2 \3/p' | tr '\n' '\0' > "$@" 91endef 92 93$(obj)/syms.bin: $(obj)/vmlinux.syms FORCE 94 $(call if_changed,dumpsyms) 95 96OBJCOPYFLAGS_syms.o := -I binary -O elf64-s390 -B s390:64-bit --rename-section .data=.decompressor.syms 97$(obj)/syms.o: $(obj)/syms.bin FORCE 98 $(call if_changed,objcopy) 99 100OBJCOPYFLAGS_info.bin := -O binary --only-section=.vmlinux.info --set-section-flags .vmlinux.info=alloc,load 101$(obj)/info.bin: vmlinux FORCE 102 $(call if_changed,objcopy) 103 104OBJCOPYFLAGS_info.o := -I binary -O elf64-s390 -B s390:64-bit --rename-section .data=.vmlinux.info 105$(obj)/info.o: $(obj)/info.bin FORCE 106 $(call if_changed,objcopy) 107 108OBJCOPYFLAGS_vmlinux.bin := -O binary --remove-section=.comment --remove-section=.vmlinux.info -S 109$(obj)/vmlinux.bin: vmlinux FORCE 110 $(call if_changed,objcopy) 111 112CMD_RELOCS=arch/s390/tools/relocs 113quiet_cmd_relocs = RELOCS $@ 114 cmd_relocs = $(CMD_RELOCS) $< > $@ 115$(obj)/relocs.S: vmlinux FORCE 116 $(call if_changed,relocs) 117 118suffix-$(CONFIG_KERNEL_GZIP) := .gz 119suffix-$(CONFIG_KERNEL_BZIP2) := .bz2 120suffix-$(CONFIG_KERNEL_LZ4) := .lz4 121suffix-$(CONFIG_KERNEL_LZMA) := .lzma 122suffix-$(CONFIG_KERNEL_LZO) := .lzo 123suffix-$(CONFIG_KERNEL_XZ) := .xz 124suffix-$(CONFIG_KERNEL_ZSTD) := .zst 125 126$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE 127 $(call if_changed,gzip) 128$(obj)/vmlinux.bin.bz2: $(obj)/vmlinux.bin FORCE 129 $(call if_changed,bzip2_with_size) 130$(obj)/vmlinux.bin.lz4: $(obj)/vmlinux.bin FORCE 131 $(call if_changed,lz4_with_size) 132$(obj)/vmlinux.bin.lzma: $(obj)/vmlinux.bin FORCE 133 $(call if_changed,lzma_with_size) 134$(obj)/vmlinux.bin.lzo: $(obj)/vmlinux.bin FORCE 135 $(call if_changed,lzo_with_size) 136$(obj)/vmlinux.bin.xz: $(obj)/vmlinux.bin FORCE 137 $(call if_changed,xzkern_with_size) 138$(obj)/vmlinux.bin.zst: $(obj)/vmlinux.bin FORCE 139 $(call if_changed,zstd22_with_size) 140 141OBJCOPYFLAGS_piggy.o := -I binary -O elf64-s390 -B s390:64-bit --rename-section .data=.vmlinux.bin.compressed 142$(obj)/piggy.o: $(obj)/vmlinux.bin$(suffix-y) FORCE 143 $(call if_changed,objcopy) 144