1 # SPDX-License-Identifier: GPL-2.0
2 # Copyright (c) 2022 Meta Platforms, Inc. and
3 include ../build/Build.include
4 include ../scripts/Makefile.arch
5 include ../scripts/Makefile.include
6
7 all: all_targets
8
9 ifneq ($(LLVM),)
10 ifneq ($(filter %/,$(LLVM)),)
11 LLVM_PREFIX := $(LLVM)
12 else ifneq ($(filter -%,$(LLVM)),)
13 LLVM_SUFFIX := $(LLVM)
14 endif
15
16 CLANG_TARGET_FLAGS_arm := arm-linux-g
17 CLANG_TARGET_FLAGS_arm64 := aarch64-lin
18 CLANG_TARGET_FLAGS_hexagon := hexagon-lin
19 CLANG_TARGET_FLAGS_m68k := m68k-linux-
20 CLANG_TARGET_FLAGS_mips := mipsel-linu
21 CLANG_TARGET_FLAGS_powerpc := powerpc64le
22 CLANG_TARGET_FLAGS_riscv := riscv64-lin
23 CLANG_TARGET_FLAGS_s390 := s390x-linux
24 CLANG_TARGET_FLAGS_x86 := x86_64-linu
25 CLANG_TARGET_FLAGS := $(CLANG_TAR
26
27 ifeq ($(CROSS_COMPILE),)
28 ifeq ($(CLANG_TARGET_FLAGS),)
29 $(error Specify CROSS_COMPILE or add '--target
30 else
31 CLANG_FLAGS += --target=$(CLANG_TARGET_FLA
32 endif # CLANG_TARGET_FLAGS
33 else
34 CLANG_FLAGS += --target=$(notdir $(CROSS_C
35 endif # CROSS_COMPILE
36
37 CC := $(LLVM_PREFIX)clang$(LLVM_SUFFIX) $(CLAN
38 else
39 CC := $(CROSS_COMPILE)gcc
40 endif # LLVM
41
42 CURDIR := $(abspath .)
43 TOOLSDIR := $(abspath ..)
44 LIBDIR := $(TOOLSDIR)/lib
45 BPFDIR := $(LIBDIR)/bpf
46 TOOLSINCDIR := $(TOOLSDIR)/include
47 BPFTOOLDIR := $(TOOLSDIR)/bpf/bpftool
48 APIDIR := $(TOOLSINCDIR)/uapi
49 GENDIR := $(abspath ../../include/generated)
50 GENHDR := $(GENDIR)/autoconf.h
51
52 ifeq ($(O),)
53 OUTPUT_DIR := $(CURDIR)/build
54 else
55 OUTPUT_DIR := $(O)/build
56 endif # O
57 OBJ_DIR := $(OUTPUT_DIR)/obj
58 INCLUDE_DIR := $(OUTPUT_DIR)/include
59 BPFOBJ_DIR := $(OBJ_DIR)/libbpf
60 SCXOBJ_DIR := $(OBJ_DIR)/sched_ext
61 BINDIR := $(OUTPUT_DIR)/bin
62 BPFOBJ := $(BPFOBJ_DIR)/libbpf.a
63 ifneq ($(CROSS_COMPILE),)
64 HOST_BUILD_DIR := $(OBJ_DIR)/host
65 HOST_OUTPUT_DIR := host-tools
66 HOST_INCLUDE_DIR := $(HOST_OUTPUT_DIR)/
67 else
68 HOST_BUILD_DIR := $(OBJ_DIR)
69 HOST_OUTPUT_DIR := $(OUTPUT_DIR)
70 HOST_INCLUDE_DIR := $(INCLUDE_DIR)
71 endif
72 HOST_BPFOBJ := $(HOST_BUILD_DIR)/libbpf/libbpf
73 RESOLVE_BTFIDS := $(HOST_BUILD_DIR)/resolve_bt
74 DEFAULT_BPFTOOL := $(HOST_OUTPUT_DIR)/sbin/bpf
75
76 VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux)
77 $(if $(KBUILD_OUTPUT),$(K
78 ../../vmlinux
79 /sys/kernel/btf/vmlinux
80 /boot/vmlinux-$(shell una
81 VMLINUX_BTF ?= $(abspath $(firstword $(wildcar
82 ifeq ($(VMLINUX_BTF),)
83 $(error Cannot find a vmlinux for VMLINUX_BTF
84 endif
85
86 BPFTOOL ?= $(DEFAULT_BPFTOOL)
87
88 ifneq ($(wildcard $(GENHDR)),)
89 GENFLAGS := -DHAVE_GENHDR
90 endif
91
92 CFLAGS += -g -O2 -rdynamic -pthread -Wall -Wer
93 -I$(INCLUDE_DIR) -I$(GENDIR) -I$(LIB
94 -I$(TOOLSINCDIR) -I$(APIDIR) -I$(CUR
95
96 # Silence some warnings when compiled with cla
97 ifneq ($(LLVM),)
98 CFLAGS += -Wno-unused-command-line-argument
99 endif
100
101 LDFLAGS = -lelf -lz -lpthread
102
103 IS_LITTLE_ENDIAN = $(shell $(CC) -dM -E - </de
104 grep 'define __BYTE_OR
105
106 # Get Clang's default includes on this system,
107 # '-target bpf'. This fixes "missing" files on
108 # such as asm/byteorder.h, asm/socket.h, asm/s
109 #
110 # Use '-idirafter': Don't interfere with inclu
111 # build would have failed anyways.
112 define get_sys_includes
113 $(shell $(1) -v -E - </dev/null 2>&1 \
114 | sed -n '/<...> search starts here:/,
115 $(shell $(1) -dM -E - </dev/null | grep '__ris
116 endef
117
118 BPF_CFLAGS = -g -D__TARGET_ARCH_$(SRCARCH)
119 $(if $(IS_LITTLE_ENDIAN),-mlittle
120 -I$(CURDIR)/include -I$(CURDIR)/i
121 -I$(INCLUDE_DIR) -I$(APIDIR)
122 -I../../include
123 $(call get_sys_includes,$(CLANG))
124 -Wall -Wno-compare-distinct-point
125 -O2 -mcpu=v3
126
127 # sort removes libbpf duplicates when not cros
128 MAKE_DIRS := $(sort $(OBJ_DIR)/libbpf $(HOST_B
129 $(HOST_BUILD_DIR)/bpftool $(HOS
130 $(INCLUDE_DIR) $(SCXOBJ_DIR) $(
131
132 $(MAKE_DIRS):
133 $(call msg,MKDIR,,$@)
134 $(Q)mkdir -p $@
135
136 $(BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDI
137 $(APIDIR)/linux/bpf.h
138 | $(OBJ_DIR)/libbpf
139 $(Q)$(MAKE) $(submake_extras) -C $(BPF
140 EXTRA_CFLAGS='-g -O0 -fPIC
141 DESTDIR=$(OUTPUT_DIR) pref
142
143 $(DEFAULT_BPFTOOL): $(wildcard $(BPFTOOLDIR)/*
144 $(HOST_BPFOBJ) | $(HOST_BU
145 $(Q)$(MAKE) $(submake_extras) -C $(BP
146 ARCH= CROSS_COMPILE= CC=$(
147 EXTRA_CFLAGS='-g -O0'
148 OUTPUT=$(HOST_BUILD_DIR)/b
149 LIBBPF_OUTPUT=$(HOST_BUILD
150 LIBBPF_DESTDIR=$(HOST_OUTP
151 prefix= DESTDIR=$(HOST_OUT
152
153 $(INCLUDE_DIR)/vmlinux.h: $(VMLINUX_BTF) $(BPF
154 ifeq ($(VMLINUX_H),)
155 $(call msg,GEN,,$@)
156 $(Q)$(BPFTOOL) btf dump file $(VMLINUX
157 else
158 $(call msg,CP,,$@)
159 $(Q)cp "$(VMLINUX_H)" $@
160 endif
161
162 $(SCXOBJ_DIR)/%.bpf.o: %.bpf.c $(INCLUDE_DIR)/
163 | $(BPFOBJ) $(SCXOBJ_DI
164 $(call msg,CLNG-BPF,,$(notdir $@))
165 $(Q)$(CLANG) $(BPF_CFLAGS) -target bpf
166
167 $(INCLUDE_DIR)/%.bpf.skel.h: $(SCXOBJ_DIR)/%.b
168 $(eval sched=$(notdir $@))
169 $(call msg,GEN-SKEL,,$(sched))
170 $(Q)$(BPFTOOL) gen object $(<:.o=.link
171 $(Q)$(BPFTOOL) gen object $(<:.o=.link
172 $(Q)$(BPFTOOL) gen object $(<:.o=.link
173 $(Q)diff $(<:.o=.linked2.o) $(<:.o=.li
174 $(Q)$(BPFTOOL) gen skeleton $(<:.o=.li
175 $(Q)$(BPFTOOL) gen subskeleton $(<:.o=
176
177 SCX_COMMON_DEPS := include/scx/common.h includ
178
179 c-sched-targets = scx_simple scx_qmap scx_cent
180
181 $(addprefix $(BINDIR)/,$(c-sched-targets)): \
182 $(BINDIR)/%: \
183 $(filter-out %.bpf.c,%.c) \
184 $(INCLUDE_DIR)/%.bpf.skel.h \
185 $(SCX_COMMON_DEPS)
186 $(eval sched=$(notdir $@))
187 $(CC) $(CFLAGS) -c $(sched).c -o $(SCX
188 $(CC) -o $@ $(SCXOBJ_DIR)/$(sched).o $
189
190 $(c-sched-targets): %: $(BINDIR)/%
191
192 install: all
193 $(Q)mkdir -p $(DESTDIR)/usr/local/bin/
194 $(Q)cp $(BINDIR)/* $(DESTDIR)/usr/loca
195
196 clean:
197 rm -rf $(OUTPUT_DIR) $(HOST_OUTPUT_DIR
198 rm -f *.o *.bpf.o *.bpf.skel.h *.bpf.s
199 rm -f $(c-sched-targets)
200
201 help:
202 @echo 'Building targets'
203 @echo '================'
204 @echo ''
205 @echo ' all - Compile al
206 @echo ''
207 @echo 'Alternatively, you may compil
208 @echo ''
209 @printf ' %s\n' $(c-sched-targets)
210 @echo ''
211 @echo 'For any scheduler build targe
212 @echo 'build output path with the O=
213 @echo ''
214 @echo ' O=/tmp/sched_ext make all'
215 @echo ''
216 @echo 'will compile all schedulers,
217 @echo '/tmp/sched_ext/build.'
218 @echo ''
219 @echo ''
220 @echo 'Installing targets'
221 @echo '=================='
222 @echo ''
223 @echo ' install - Compile an
224 @echo ' You may sp
225 @echo ' to indicat
226 @echo ''
227 @echo ' DESTDIR=
228 @echo ''
229 @echo ' will build
230 @echo ' install th
231 @echo ''
232 @echo ''
233 @echo 'Cleaning targets'
234 @echo '================'
235 @echo ''
236 @echo ' clean - Re
237
238 all_targets: $(c-sched-targets)
239
240 .PHONY: all all_targets $(c-sched-targets) cle
241
242 # delete failed targets
243 .DELETE_ON_ERROR:
244
245 # keep intermediate (.bpf.skel.h, .bpf.o, etc)
246 .SECONDARY:
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.