1# SPDX-License-Identifier: GPL-2.0
2#
3# Makefile for the linux s390-specific parts of the memory manager.
4#
5
6KCOV_INSTRUMENT := n
7GCOV_PROFILE := n
8UBSAN_SANITIZE := n
9KASAN_SANITIZE := n
10KCSAN_SANITIZE := n
11
12KBUILD_AFLAGS := $(KBUILD_AFLAGS_DECOMPRESSOR)
13KBUILD_CFLAGS := $(KBUILD_CFLAGS_DECOMPRESSOR)
14
15#
16# Use minimum architecture for als.c to be able to print an error
17# message if the kernel is started on a machine which is too old
18#
19ifndef CONFIG_CC_IS_CLANG
20CC_FLAGS_MARCH_MINIMUM := -march=z900
21else
22CC_FLAGS_MARCH_MINIMUM := -march=z10
23endif
24
25ifneq ($(CC_FLAGS_MARCH),$(CC_FLAGS_MARCH_MINIMUM))
26AFLAGS_REMOVE_head.o		+= $(CC_FLAGS_MARCH)
27AFLAGS_head.o			+= $(CC_FLAGS_MARCH_MINIMUM)
28AFLAGS_REMOVE_mem.o		+= $(CC_FLAGS_MARCH)
29AFLAGS_mem.o			+= $(CC_FLAGS_MARCH_MINIMUM)
30CFLAGS_REMOVE_als.o		+= $(CC_FLAGS_MARCH)
31CFLAGS_als.o			+= $(CC_FLAGS_MARCH_MINIMUM)
32CFLAGS_REMOVE_sclp_early_core.o	+= $(CC_FLAGS_MARCH)
33CFLAGS_sclp_early_core.o	+= $(CC_FLAGS_MARCH_MINIMUM)
34endif
35
36CFLAGS_sclp_early_core.o += -I$(srctree)/drivers/s390/char
37
38obj-y	:= head.o als.o startup.o physmem_info.o ipl_parm.o ipl_report.o vmem.o
39obj-y	+= string.o ebcdic.o sclp_early_core.o mem.o ipl_vmparm.o cmdline.o
40obj-y	+= version.o pgm_check_info.o ctype.o ipl_data.o
41obj-y	+= $(if $(CONFIG_PIE_BUILD),machine_kexec_reloc.o,relocs.o)
42obj-$(findstring y, $(CONFIG_PROTECTED_VIRTUALIZATION_GUEST) $(CONFIG_PGSTE))	+= uv.o
43obj-$(CONFIG_RANDOMIZE_BASE)	+= kaslr.o
44obj-y	+= $(if $(CONFIG_KERNEL_UNCOMPRESSED),,decompressor.o) info.o
45obj-$(CONFIG_KERNEL_ZSTD) += clz_ctz.o
46obj-all := $(obj-y) piggy.o syms.o
47
48targets	:= bzImage section_cmp.boot.data section_cmp.boot.preserved.data $(obj-y)
49targets	+= vmlinux.lds vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2
50targets += vmlinux.bin.xz vmlinux.bin.lzma vmlinux.bin.lzo vmlinux.bin.lz4
51targets += vmlinux.bin.zst info.bin syms.bin vmlinux.syms $(obj-all)
52ifndef CONFIG_PIE_BUILD
53targets += relocs.S
54endif
55
56OBJECTS := $(addprefix $(obj)/,$(obj-y))
57OBJECTS_ALL := $(addprefix $(obj)/,$(obj-all))
58
59clean-files += vmlinux.map
60
61quiet_cmd_section_cmp = SECTCMP $*
62define cmd_section_cmp
63	s1=`$(OBJDUMP) -t "$<" | grep "\s$*\s\+" | sort | \
64		sed -n "/0000000000000000/! s/.*\s$*\s\+//p" | sha256sum`; \
65	s2=`$(OBJDUMP) -t "$(word 2,$^)" | grep "\s$*\s\+" | sort | \
66		sed -n "/0000000000000000/! s/.*\s$*\s\+//p" | sha256sum`; \
67	if [ "$$s1" != "$$s2" ]; then \
68		echo "error: section $* differs between $< and $(word 2,$^)" >&2; \
69		exit 1; \
70	fi; \
71	touch $@
72endef
73
74$(obj)/bzImage: $(obj)/vmlinux $(obj)/section_cmp.boot.data $(obj)/section_cmp.boot.preserved.data FORCE
75	$(call if_changed,objcopy)
76
77$(obj)/section_cmp%: vmlinux $(obj)/vmlinux FORCE
78	$(call if_changed,section_cmp)
79
80LDFLAGS_vmlinux-$(CONFIG_LD_ORPHAN_WARN) := --orphan-handling=$(CONFIG_LD_ORPHAN_WARN_LEVEL)
81LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y) --oformat $(LD_BFD) -e startup $(if $(CONFIG_VMLINUX_MAP),-Map=$(obj)/vmlinux.map) --build-id=sha1 -T
82$(obj)/vmlinux: $(obj)/vmlinux.lds $(OBJECTS_ALL) FORCE
83	$(call if_changed,ld)
84
85LDFLAGS_vmlinux.syms := $(LDFLAGS_vmlinux-y) --oformat $(LD_BFD) -e startup -T
86$(obj)/vmlinux.syms: $(obj)/vmlinux.lds $(OBJECTS) FORCE
87	$(call if_changed,ld)
88
89quiet_cmd_dumpsyms = DUMPSYMS $<
90define cmd_dumpsyms
91	$(NM) -n -S --format=bsd "$<" | sed -nE 's/^0*([0-9a-fA-F]+) 0*([0-9a-fA-F]+) [tT] ([^ ]*)$$/\1 \2 \3/p' | tr '\n' '\0' > "$@"
92endef
93
94$(obj)/syms.bin: $(obj)/vmlinux.syms FORCE
95	$(call if_changed,dumpsyms)
96
97OBJCOPYFLAGS_syms.o := -I binary -O elf64-s390 -B s390:64-bit --rename-section .data=.decompressor.syms
98$(obj)/syms.o: $(obj)/syms.bin FORCE
99	$(call if_changed,objcopy)
100
101OBJCOPYFLAGS_info.bin := -O binary --only-section=.vmlinux.info --set-section-flags .vmlinux.info=alloc,load
102$(obj)/info.bin: vmlinux FORCE
103	$(call if_changed,objcopy)
104
105OBJCOPYFLAGS_info.o := -I binary -O elf64-s390 -B s390:64-bit --rename-section .data=.vmlinux.info
106$(obj)/info.o: $(obj)/info.bin FORCE
107	$(call if_changed,objcopy)
108
109OBJCOPYFLAGS_vmlinux.bin := -O binary --remove-section=.comment --remove-section=.vmlinux.info -S
110$(obj)/vmlinux.bin: vmlinux FORCE
111	$(call if_changed,objcopy)
112
113ifndef CONFIG_PIE_BUILD
114CMD_RELOCS=arch/s390/tools/relocs
115quiet_cmd_relocs = RELOCS $@
116	cmd_relocs = $(CMD_RELOCS) $< > $@
117$(obj)/relocs.S: vmlinux FORCE
118	$(call if_changed,relocs)
119endif
120
121suffix-$(CONFIG_KERNEL_GZIP)  := .gz
122suffix-$(CONFIG_KERNEL_BZIP2) := .bz2
123suffix-$(CONFIG_KERNEL_LZ4)  := .lz4
124suffix-$(CONFIG_KERNEL_LZMA)  := .lzma
125suffix-$(CONFIG_KERNEL_LZO)  := .lzo
126suffix-$(CONFIG_KERNEL_XZ)  := .xz
127suffix-$(CONFIG_KERNEL_ZSTD)  := .zst
128
129$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE
130	$(call if_changed,gzip)
131$(obj)/vmlinux.bin.bz2: $(obj)/vmlinux.bin FORCE
132	$(call if_changed,bzip2_with_size)
133$(obj)/vmlinux.bin.lz4: $(obj)/vmlinux.bin FORCE
134	$(call if_changed,lz4_with_size)
135$(obj)/vmlinux.bin.lzma: $(obj)/vmlinux.bin FORCE
136	$(call if_changed,lzma_with_size)
137$(obj)/vmlinux.bin.lzo: $(obj)/vmlinux.bin FORCE
138	$(call if_changed,lzo_with_size)
139$(obj)/vmlinux.bin.xz: $(obj)/vmlinux.bin FORCE
140	$(call if_changed,xzkern_with_size)
141$(obj)/vmlinux.bin.zst: $(obj)/vmlinux.bin FORCE
142	$(call if_changed,zstd22_with_size)
143
144OBJCOPYFLAGS_piggy.o := -I binary -O elf64-s390 -B s390:64-bit --rename-section .data=.vmlinux.bin.compressed
145$(obj)/piggy.o: $(obj)/vmlinux.bin$(suffix-y) FORCE
146	$(call if_changed,objcopy)
147