1 # SPDX-License-Identifier: GPL-2.0
3 # Makefile for the linux s390-specific parts of the memory manager.
6 # Tooling runtimes are unavailable and cannot be linked for early boot code
15 # Use minimum architecture level so it is possible to print an error
16 # message if the kernel is started on a machine which is too old
18 CC_FLAGS_MARCH_MINIMUM := -march=z10
20 KBUILD_AFLAGS := $(filter-out $(CC_FLAGS_MARCH),$(KBUILD_AFLAGS_DECOMPRESSOR))
21 KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_MARCH),$(KBUILD_CFLAGS_DECOMPRESSOR))
22 KBUILD_AFLAGS += $(CC_FLAGS_MARCH_MINIMUM)
23 KBUILD_CFLAGS += $(CC_FLAGS_MARCH_MINIMUM)
25 CFLAGS_sclp_early_core.o += -I$(srctree)/drivers/s390/char
27 obj-y := head.o als.o startup.o physmem_info.o ipl_parm.o ipl_report.o vmem.o
28 obj-y += string.o ebcdic.o sclp_early_core.o mem.o ipl_vmparm.o cmdline.o
29 obj-y += version.o pgm_check_info.o ctype.o ipl_data.o relocs.o alternative.o
30 obj-y += uv.o printk.o
31 obj-$(CONFIG_RANDOMIZE_BASE) += kaslr.o
32 obj-y += $(if $(CONFIG_KERNEL_UNCOMPRESSED),,decompressor.o) info.o
33 obj-$(CONFIG_KERNEL_ZSTD) += clz_ctz.o
34 obj-$(CONFIG_KMSAN) += kmsan.o
35 obj-all := $(obj-y) piggy.o syms.o
37 targets := bzImage section_cmp.boot.data section_cmp.boot.preserved.data $(obj-y)
38 targets += vmlinux.lds vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2
39 targets += vmlinux.bin.xz vmlinux.bin.lzma vmlinux.bin.lzo vmlinux.bin.lz4
40 targets += vmlinux.bin.zst info.bin syms.bin vmlinux.syms $(obj-all)
43 OBJECTS := $(addprefix $(obj)/,$(obj-y))
44 OBJECTS_ALL := $(addprefix $(obj)/,$(obj-all))
46 clean-files += vmlinux.map
48 quiet_cmd_section_cmp = SECTCMP $*
49 define cmd_section_cmp
50 s1=`$(OBJDUMP) -t "$<" | grep "\s$*\s\+" | sort | \
51 sed -n "/0000000000000000/! s/.*\s$*\s\+//p" | sha256sum`; \
52 s2=`$(OBJDUMP) -t "$(word 2,$^)" | grep "\s$*\s\+" | sort | \
53 sed -n "/0000000000000000/! s/.*\s$*\s\+//p" | sha256sum`; \
54 if [ "$$s1" != "$$s2" ]; then \
55 echo "error: section $* differs between $< and $(word 2,$^)" >&2; \
61 $(obj)/bzImage: $(obj)/vmlinux $(obj)/section_cmp.boot.data $(obj)/section_cmp.boot.preserved.data FORCE
62 $(call if_changed,objcopy)
64 $(obj)/section_cmp%: vmlinux $(obj)/vmlinux FORCE
65 $(call if_changed,section_cmp)
67 LDFLAGS_vmlinux-$(CONFIG_LD_ORPHAN_WARN) := --orphan-handling=$(CONFIG_LD_ORPHAN_WARN_LEVEL)
68 LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y) --oformat $(LD_BFD) -e startup $(if $(CONFIG_VMLINUX_MAP),-Map=$(obj)/vmlinux.map) --build-id=sha1 -T
69 $(obj)/vmlinux: $(obj)/vmlinux.lds $(OBJECTS_ALL) FORCE
72 LDFLAGS_vmlinux.syms := $(LDFLAGS_vmlinux-y) --oformat $(LD_BFD) -e startup -T
73 $(obj)/vmlinux.syms: $(obj)/vmlinux.lds $(OBJECTS) FORCE
76 quiet_cmd_dumpsyms = DUMPSYMS $<
78 $(NM) -n -S --format=bsd "$<" | sed -nE 's/^0*([0-9a-fA-F]+) 0*([0-9a-fA-F]+) [tT] ([^ ]*)$$/\1 \2 \3/p' | tr '\n' '\0' > "$@"
81 $(obj)/syms.bin: $(obj)/vmlinux.syms FORCE
82 $(call if_changed,dumpsyms)
84 OBJCOPYFLAGS_syms.o := -I binary -O elf64-s390 -B s390:64-bit --rename-section .data=.decompressor.syms
85 $(obj)/syms.o: $(obj)/syms.bin FORCE
86 $(call if_changed,objcopy)
88 OBJCOPYFLAGS_info.bin := -O binary --only-section=.vmlinux.info --set-section-flags .vmlinux.info=alloc,load
89 $(obj)/info.bin: vmlinux FORCE
90 $(call if_changed,objcopy)
92 OBJCOPYFLAGS_info.o := -I binary -O elf64-s390 -B s390:64-bit --rename-section .data=.vmlinux.info
93 $(obj)/info.o: $(obj)/info.bin FORCE
94 $(call if_changed,objcopy)
96 OBJCOPYFLAGS_vmlinux.bin := -O binary --remove-section=.comment --remove-section=.vmlinux.info -S
97 $(obj)/vmlinux.bin: vmlinux FORCE
98 $(call if_changed,objcopy)
100 # relocs.S is created by the vmlinux postlink step.
101 $(obj)/relocs.S: vmlinux
104 suffix-$(CONFIG_KERNEL_GZIP) := .gz
105 suffix-$(CONFIG_KERNEL_BZIP2) := .bz2
106 suffix-$(CONFIG_KERNEL_LZ4) := .lz4
107 suffix-$(CONFIG_KERNEL_LZMA) := .lzma
108 suffix-$(CONFIG_KERNEL_LZO) := .lzo
109 suffix-$(CONFIG_KERNEL_XZ) := .xz
110 suffix-$(CONFIG_KERNEL_ZSTD) := .zst
112 $(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE
113 $(call if_changed,gzip)
114 $(obj)/vmlinux.bin.bz2: $(obj)/vmlinux.bin FORCE
115 $(call if_changed,bzip2_with_size)
116 $(obj)/vmlinux.bin.lz4: $(obj)/vmlinux.bin FORCE
117 $(call if_changed,lz4_with_size)
118 $(obj)/vmlinux.bin.lzma: $(obj)/vmlinux.bin FORCE
119 $(call if_changed,lzma_with_size)
120 $(obj)/vmlinux.bin.lzo: $(obj)/vmlinux.bin FORCE
121 $(call if_changed,lzo_with_size)
122 $(obj)/vmlinux.bin.xz: $(obj)/vmlinux.bin FORCE
123 $(call if_changed,xzkern_with_size)
124 $(obj)/vmlinux.bin.zst: $(obj)/vmlinux.bin FORCE
125 $(call if_changed,zstd22_with_size)
127 OBJCOPYFLAGS_piggy.o := -I binary -O elf64-s390 -B s390:64-bit --rename-section .data=.vmlinux.bin.compressed
128 $(obj)/piggy.o: $(obj)/vmlinux.bin$(suffix-y) FORCE
129 $(call if_changed,objcopy)