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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
7 KCOV_INSTRUMENT := n
8 GCOV_PROFILE := n
9 UBSAN_SANITIZE := n
10 KASAN_SANITIZE := n
11 KCSAN_SANITIZE := n
12 KMSAN_SANITIZE := n
13
14 #
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
17 #
18 CC_FLAGS_MARCH_MINIMUM := -march=z10
19
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 += $(CC_FLAGS_MARCH_MINIMUM)
24
25 CFLAGS_sclp_early_core.o += -I$(srctree)/drivers/s390/char
26
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
36
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)
41 targets += relocs.S
42
43 OBJECTS := $(addprefix $(obj)/,$(obj-y))
44 OBJECTS_ALL := $(addprefix $(obj)/,$(obj-all))
45
46 clean-files += vmlinux.map
47
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; \
56                 exit 1; \
57         fi; \
58         touch $@
59 endef
60
61 $(obj)/bzImage: $(obj)/vmlinux $(obj)/section_cmp.boot.data $(obj)/section_cmp.boot.preserved.data FORCE
62         $(call if_changed,objcopy)
63
64 $(obj)/section_cmp%: vmlinux $(obj)/vmlinux FORCE
65         $(call if_changed,section_cmp)
66
67 LDFLAGS_vmlinux-$(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
70         $(call if_changed,ld)
71
72 LDFLAGS_vmlinux.syms := $(LDFLAGS_vmlinux-y) --oformat $(LD_BFD) -e startup -T
73 $(obj)/vmlinux.syms: $(obj)/vmlinux.lds $(OBJECTS) FORCE
74         $(call if_changed,ld)
75
76 quiet_cmd_dumpsyms = DUMPSYMS $<
77 define cmd_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' > "$@"
79 endef
80
81 $(obj)/syms.bin: $(obj)/vmlinux.syms FORCE
82         $(call if_changed,dumpsyms)
83
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)
87
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)
91
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)
95
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)
99
100 # relocs.S is created by the vmlinux postlink step.
101 $(obj)/relocs.S: vmlinux
102         @true
103
104 suffix-$(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
111
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)
126
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)
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