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