12a52ca7cSTejun Heo# SPDX-License-Identifier: GPL-2.0 22a52ca7cSTejun Heo# Copyright (c) 2022 Meta Platforms, Inc. and affiliates. 32a52ca7cSTejun Heoinclude ../build/Build.include 42a52ca7cSTejun Heoinclude ../scripts/Makefile.arch 52a52ca7cSTejun Heoinclude ../scripts/Makefile.include 62a52ca7cSTejun Heo 72a52ca7cSTejun Heoall: all_targets 82a52ca7cSTejun Heo 92a52ca7cSTejun Heoifneq ($(LLVM),) 102a52ca7cSTejun Heoifneq ($(filter %/,$(LLVM)),) 112a52ca7cSTejun HeoLLVM_PREFIX := $(LLVM) 122a52ca7cSTejun Heoelse ifneq ($(filter -%,$(LLVM)),) 132a52ca7cSTejun HeoLLVM_SUFFIX := $(LLVM) 142a52ca7cSTejun Heoendif 152a52ca7cSTejun Heo 162a52ca7cSTejun HeoCLANG_TARGET_FLAGS_arm := arm-linux-gnueabi 172a52ca7cSTejun HeoCLANG_TARGET_FLAGS_arm64 := aarch64-linux-gnu 182a52ca7cSTejun HeoCLANG_TARGET_FLAGS_hexagon := hexagon-linux-musl 192a52ca7cSTejun HeoCLANG_TARGET_FLAGS_m68k := m68k-linux-gnu 202a52ca7cSTejun HeoCLANG_TARGET_FLAGS_mips := mipsel-linux-gnu 212a52ca7cSTejun HeoCLANG_TARGET_FLAGS_powerpc := powerpc64le-linux-gnu 222a52ca7cSTejun HeoCLANG_TARGET_FLAGS_riscv := riscv64-linux-gnu 232a52ca7cSTejun HeoCLANG_TARGET_FLAGS_s390 := s390x-linux-gnu 242a52ca7cSTejun HeoCLANG_TARGET_FLAGS_x86 := x86_64-linux-gnu 252a52ca7cSTejun HeoCLANG_TARGET_FLAGS := $(CLANG_TARGET_FLAGS_$(ARCH)) 262a52ca7cSTejun Heo 272a52ca7cSTejun Heoifeq ($(CROSS_COMPILE),) 282a52ca7cSTejun Heoifeq ($(CLANG_TARGET_FLAGS),) 292a52ca7cSTejun Heo$(error Specify CROSS_COMPILE or add '--target=' option to lib.mk) 302a52ca7cSTejun Heoelse 312a52ca7cSTejun HeoCLANG_FLAGS += --target=$(CLANG_TARGET_FLAGS) 322a52ca7cSTejun Heoendif # CLANG_TARGET_FLAGS 332a52ca7cSTejun Heoelse 342a52ca7cSTejun HeoCLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%)) 352a52ca7cSTejun Heoendif # CROSS_COMPILE 362a52ca7cSTejun Heo 372a52ca7cSTejun HeoCC := $(LLVM_PREFIX)clang$(LLVM_SUFFIX) $(CLANG_FLAGS) -fintegrated-as 382a52ca7cSTejun Heoelse 392a52ca7cSTejun HeoCC := $(CROSS_COMPILE)gcc 402a52ca7cSTejun Heoendif # LLVM 412a52ca7cSTejun Heo 422a52ca7cSTejun HeoCURDIR := $(abspath .) 432a52ca7cSTejun HeoTOOLSDIR := $(abspath ..) 442a52ca7cSTejun HeoLIBDIR := $(TOOLSDIR)/lib 452a52ca7cSTejun HeoBPFDIR := $(LIBDIR)/bpf 462a52ca7cSTejun HeoTOOLSINCDIR := $(TOOLSDIR)/include 472a52ca7cSTejun HeoBPFTOOLDIR := $(TOOLSDIR)/bpf/bpftool 482a52ca7cSTejun HeoAPIDIR := $(TOOLSINCDIR)/uapi 492a52ca7cSTejun HeoGENDIR := $(abspath ../../include/generated) 502a52ca7cSTejun HeoGENHDR := $(GENDIR)/autoconf.h 512a52ca7cSTejun Heo 522a52ca7cSTejun Heoifeq ($(O),) 532a52ca7cSTejun HeoOUTPUT_DIR := $(CURDIR)/build 542a52ca7cSTejun Heoelse 552a52ca7cSTejun HeoOUTPUT_DIR := $(O)/build 562a52ca7cSTejun Heoendif # O 572a52ca7cSTejun HeoOBJ_DIR := $(OUTPUT_DIR)/obj 582a52ca7cSTejun HeoINCLUDE_DIR := $(OUTPUT_DIR)/include 592a52ca7cSTejun HeoBPFOBJ_DIR := $(OBJ_DIR)/libbpf 602a52ca7cSTejun HeoSCXOBJ_DIR := $(OBJ_DIR)/sched_ext 612a52ca7cSTejun HeoBINDIR := $(OUTPUT_DIR)/bin 622a52ca7cSTejun HeoBPFOBJ := $(BPFOBJ_DIR)/libbpf.a 632a52ca7cSTejun Heoifneq ($(CROSS_COMPILE),) 64*6d65f682SyangsonghuaHOST_BUILD_DIR := $(OBJ_DIR)/host/obj 65*6d65f682SyangsonghuaHOST_OUTPUT_DIR := $(OBJ_DIR)/host 662a52ca7cSTejun HeoHOST_INCLUDE_DIR := $(HOST_OUTPUT_DIR)/include 672a52ca7cSTejun Heoelse 682a52ca7cSTejun HeoHOST_BUILD_DIR := $(OBJ_DIR) 692a52ca7cSTejun HeoHOST_OUTPUT_DIR := $(OUTPUT_DIR) 702a52ca7cSTejun HeoHOST_INCLUDE_DIR := $(INCLUDE_DIR) 712a52ca7cSTejun Heoendif 722a52ca7cSTejun HeoHOST_BPFOBJ := $(HOST_BUILD_DIR)/libbpf/libbpf.a 732a52ca7cSTejun HeoRESOLVE_BTFIDS := $(HOST_BUILD_DIR)/resolve_btfids/resolve_btfids 742a52ca7cSTejun HeoDEFAULT_BPFTOOL := $(HOST_OUTPUT_DIR)/sbin/bpftool 752a52ca7cSTejun Heo 762a52ca7cSTejun HeoVMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux) \ 772a52ca7cSTejun Heo $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux) \ 782a52ca7cSTejun Heo ../../vmlinux \ 792a52ca7cSTejun Heo /sys/kernel/btf/vmlinux \ 802a52ca7cSTejun Heo /boot/vmlinux-$(shell uname -r) 812a52ca7cSTejun HeoVMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS)))) 822a52ca7cSTejun Heoifeq ($(VMLINUX_BTF),) 832a52ca7cSTejun Heo$(error Cannot find a vmlinux for VMLINUX_BTF at any of "$(VMLINUX_BTF_PATHS)") 842a52ca7cSTejun Heoendif 852a52ca7cSTejun Heo 862a52ca7cSTejun HeoBPFTOOL ?= $(DEFAULT_BPFTOOL) 872a52ca7cSTejun Heo 882a52ca7cSTejun Heoifneq ($(wildcard $(GENHDR)),) 892a52ca7cSTejun Heo GENFLAGS := -DHAVE_GENHDR 902a52ca7cSTejun Heoendif 912a52ca7cSTejun Heo 922a52ca7cSTejun HeoCFLAGS += -g -O2 -rdynamic -pthread -Wall -Werror $(GENFLAGS) \ 932a52ca7cSTejun Heo -I$(INCLUDE_DIR) -I$(GENDIR) -I$(LIBDIR) \ 942a52ca7cSTejun Heo -I$(TOOLSINCDIR) -I$(APIDIR) -I$(CURDIR)/include 952a52ca7cSTejun Heo 962a52ca7cSTejun Heo# Silence some warnings when compiled with clang 972a52ca7cSTejun Heoifneq ($(LLVM),) 982a52ca7cSTejun HeoCFLAGS += -Wno-unused-command-line-argument 992a52ca7cSTejun Heoendif 1002a52ca7cSTejun Heo 101*6d65f682SyangsonghuaLDFLAGS += -lelf -lz -lpthread 1022a52ca7cSTejun Heo 1032a52ca7cSTejun HeoIS_LITTLE_ENDIAN = $(shell $(CC) -dM -E - </dev/null | \ 1042a52ca7cSTejun Heo grep 'define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__') 1052a52ca7cSTejun Heo 1062a52ca7cSTejun Heo# Get Clang's default includes on this system, as opposed to those seen by 1072a52ca7cSTejun Heo# '-target bpf'. This fixes "missing" files on some architectures/distros, 1082a52ca7cSTejun Heo# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc. 1092a52ca7cSTejun Heo# 1102a52ca7cSTejun Heo# Use '-idirafter': Don't interfere with include mechanics except where the 1112a52ca7cSTejun Heo# build would have failed anyways. 1122a52ca7cSTejun Heodefine get_sys_includes 1132a52ca7cSTejun Heo$(shell $(1) -v -E - </dev/null 2>&1 \ 1142a52ca7cSTejun Heo | sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') \ 1152a52ca7cSTejun Heo$(shell $(1) -dM -E - </dev/null | grep '__riscv_xlen ' | awk '{printf("-D__riscv_xlen=%d -D__BITS_PER_LONG=%d", $$3, $$3)}') 1162a52ca7cSTejun Heoendef 1172a52ca7cSTejun Heo 1182a52ca7cSTejun HeoBPF_CFLAGS = -g -D__TARGET_ARCH_$(SRCARCH) \ 1192a52ca7cSTejun Heo $(if $(IS_LITTLE_ENDIAN),-mlittle-endian,-mbig-endian) \ 1202a52ca7cSTejun Heo -I$(CURDIR)/include -I$(CURDIR)/include/bpf-compat \ 1212a52ca7cSTejun Heo -I$(INCLUDE_DIR) -I$(APIDIR) \ 1222a52ca7cSTejun Heo -I../../include \ 1232a52ca7cSTejun Heo $(call get_sys_includes,$(CLANG)) \ 1242a52ca7cSTejun Heo -Wall -Wno-compare-distinct-pointer-types \ 1252a52ca7cSTejun Heo -O2 -mcpu=v3 1262a52ca7cSTejun Heo 1272a52ca7cSTejun Heo# sort removes libbpf duplicates when not cross-building 1282a52ca7cSTejun HeoMAKE_DIRS := $(sort $(OBJ_DIR)/libbpf $(HOST_BUILD_DIR)/libbpf \ 1292a52ca7cSTejun Heo $(HOST_BUILD_DIR)/bpftool $(HOST_BUILD_DIR)/resolve_btfids \ 1302a52ca7cSTejun Heo $(INCLUDE_DIR) $(SCXOBJ_DIR) $(BINDIR)) 1312a52ca7cSTejun Heo 1322a52ca7cSTejun Heo$(MAKE_DIRS): 1332a52ca7cSTejun Heo $(call msg,MKDIR,,$@) 1342a52ca7cSTejun Heo $(Q)mkdir -p $@ 1352a52ca7cSTejun Heo 1362a52ca7cSTejun Heo$(BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile) \ 1372a52ca7cSTejun Heo $(APIDIR)/linux/bpf.h \ 1382a52ca7cSTejun Heo | $(OBJ_DIR)/libbpf 139*6d65f682Syangsonghua $(Q)$(MAKE) $(submake_extras) CROSS_COMPILE=$(CROSS_COMPILE) \ 140*6d65f682Syangsonghua -C $(BPFDIR) OUTPUT=$(OBJ_DIR)/libbpf/ \ 1412a52ca7cSTejun Heo EXTRA_CFLAGS='-g -O0 -fPIC' \ 142*6d65f682Syangsonghua LDFLAGS="$(LDFLAGS)" \ 1432a52ca7cSTejun Heo DESTDIR=$(OUTPUT_DIR) prefix= all install_headers 1442a52ca7cSTejun Heo 145*6d65f682Syangsonghua$(HOST_BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile) \ 146*6d65f682Syangsonghua $(APIDIR)/linux/bpf.h \ 147*6d65f682Syangsonghua | $(HOST_BUILD_DIR)/libbpf 148*6d65f682Syangsonghua $(Q)$(MAKE) $(submake_extras) -C $(BPFDIR) \ 149*6d65f682Syangsonghua OUTPUT=$(HOST_BUILD_DIR)/libbpf/ \ 150*6d65f682Syangsonghua ARCH= CROSS_COMPILE= CC="$(HOSTCC)" LD=$(HOSTLD) \ 151*6d65f682Syangsonghua EXTRA_CFLAGS='-g -O0 -fPIC' \ 152*6d65f682Syangsonghua DESTDIR=$(HOST_OUTPUT_DIR) prefix= all install_headers 153*6d65f682Syangsonghua 1542a52ca7cSTejun Heo$(DEFAULT_BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile) \ 1552a52ca7cSTejun Heo $(HOST_BPFOBJ) | $(HOST_BUILD_DIR)/bpftool 1562a52ca7cSTejun Heo $(Q)$(MAKE) $(submake_extras) -C $(BPFTOOLDIR) \ 157*6d65f682Syangsonghua ARCH= CROSS_COMPILE= CC="$(HOSTCC)" LD=$(HOSTLD) \ 1582a52ca7cSTejun Heo EXTRA_CFLAGS='-g -O0' \ 1592a52ca7cSTejun Heo OUTPUT=$(HOST_BUILD_DIR)/bpftool/ \ 1602a52ca7cSTejun Heo LIBBPF_OUTPUT=$(HOST_BUILD_DIR)/libbpf/ \ 1612a52ca7cSTejun Heo LIBBPF_DESTDIR=$(HOST_OUTPUT_DIR)/ \ 1622a52ca7cSTejun Heo prefix= DESTDIR=$(HOST_OUTPUT_DIR)/ install-bin 1632a52ca7cSTejun Heo 1642a52ca7cSTejun Heo$(INCLUDE_DIR)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL) | $(INCLUDE_DIR) 1652a52ca7cSTejun Heoifeq ($(VMLINUX_H),) 1662a52ca7cSTejun Heo $(call msg,GEN,,$@) 1672a52ca7cSTejun Heo $(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF) format c > $@ 1682a52ca7cSTejun Heoelse 1692a52ca7cSTejun Heo $(call msg,CP,,$@) 1702a52ca7cSTejun Heo $(Q)cp "$(VMLINUX_H)" $@ 1712a52ca7cSTejun Heoendif 1722a52ca7cSTejun Heo 1732a52ca7cSTejun Heo$(SCXOBJ_DIR)/%.bpf.o: %.bpf.c $(INCLUDE_DIR)/vmlinux.h include/scx/*.h \ 1742a52ca7cSTejun Heo | $(BPFOBJ) $(SCXOBJ_DIR) 1752a52ca7cSTejun Heo $(call msg,CLNG-BPF,,$(notdir $@)) 1762a52ca7cSTejun Heo $(Q)$(CLANG) $(BPF_CFLAGS) -target bpf -c $< -o $@ 1772a52ca7cSTejun Heo 1782a52ca7cSTejun Heo$(INCLUDE_DIR)/%.bpf.skel.h: $(SCXOBJ_DIR)/%.bpf.o $(INCLUDE_DIR)/vmlinux.h $(BPFTOOL) 1792a52ca7cSTejun Heo $(eval sched=$(notdir $@)) 1802a52ca7cSTejun Heo $(call msg,GEN-SKEL,,$(sched)) 1812a52ca7cSTejun Heo $(Q)$(BPFTOOL) gen object $(<:.o=.linked1.o) $< 1822a52ca7cSTejun Heo $(Q)$(BPFTOOL) gen object $(<:.o=.linked2.o) $(<:.o=.linked1.o) 1832a52ca7cSTejun Heo $(Q)$(BPFTOOL) gen object $(<:.o=.linked3.o) $(<:.o=.linked2.o) 1842a52ca7cSTejun Heo $(Q)diff $(<:.o=.linked2.o) $(<:.o=.linked3.o) 1852a52ca7cSTejun Heo $(Q)$(BPFTOOL) gen skeleton $(<:.o=.linked3.o) name $(subst .bpf.skel.h,,$(sched)) > $@ 1862a52ca7cSTejun Heo $(Q)$(BPFTOOL) gen subskeleton $(<:.o=.linked3.o) name $(subst .bpf.skel.h,,$(sched)) > $(@:.skel.h=.subskel.h) 1872a52ca7cSTejun Heo 1882a52ca7cSTejun HeoSCX_COMMON_DEPS := include/scx/common.h include/scx/user_exit_info.h | $(BINDIR) 1892a52ca7cSTejun Heo 190a4103eacSTejun Heoc-sched-targets = scx_simple scx_qmap scx_central scx_flatcg 1912a52ca7cSTejun Heo 1922a52ca7cSTejun Heo$(addprefix $(BINDIR)/,$(c-sched-targets)): \ 1932a52ca7cSTejun Heo $(BINDIR)/%: \ 1942a52ca7cSTejun Heo $(filter-out %.bpf.c,%.c) \ 1952a52ca7cSTejun Heo $(INCLUDE_DIR)/%.bpf.skel.h \ 1962a52ca7cSTejun Heo $(SCX_COMMON_DEPS) 1972a52ca7cSTejun Heo $(eval sched=$(notdir $@)) 1982a52ca7cSTejun Heo $(CC) $(CFLAGS) -c $(sched).c -o $(SCXOBJ_DIR)/$(sched).o 199*6d65f682Syangsonghua $(CC) -o $@ $(SCXOBJ_DIR)/$(sched).o $(BPFOBJ) $(LDFLAGS) 2002a52ca7cSTejun Heo 2012a52ca7cSTejun Heo$(c-sched-targets): %: $(BINDIR)/% 2022a52ca7cSTejun Heo 2032a52ca7cSTejun Heoinstall: all 2042a52ca7cSTejun Heo $(Q)mkdir -p $(DESTDIR)/usr/local/bin/ 2052a52ca7cSTejun Heo $(Q)cp $(BINDIR)/* $(DESTDIR)/usr/local/bin/ 2062a52ca7cSTejun Heo 2072a52ca7cSTejun Heoclean: 2082a52ca7cSTejun Heo rm -rf $(OUTPUT_DIR) $(HOST_OUTPUT_DIR) 2092a52ca7cSTejun Heo rm -f *.o *.bpf.o *.bpf.skel.h *.bpf.subskel.h 2102a52ca7cSTejun Heo rm -f $(c-sched-targets) 2112a52ca7cSTejun Heo 2122a52ca7cSTejun Heohelp: 2132a52ca7cSTejun Heo @echo 'Building targets' 2142a52ca7cSTejun Heo @echo '================' 2152a52ca7cSTejun Heo @echo '' 2162a52ca7cSTejun Heo @echo ' all - Compile all schedulers' 2172a52ca7cSTejun Heo @echo '' 2182a52ca7cSTejun Heo @echo 'Alternatively, you may compile individual schedulers:' 2192a52ca7cSTejun Heo @echo '' 2202a52ca7cSTejun Heo @printf ' %s\n' $(c-sched-targets) 2212a52ca7cSTejun Heo @echo '' 2222a52ca7cSTejun Heo @echo 'For any scheduler build target, you may specify an alternative' 2232a52ca7cSTejun Heo @echo 'build output path with the O= environment variable. For example:' 2242a52ca7cSTejun Heo @echo '' 2252a52ca7cSTejun Heo @echo ' O=/tmp/sched_ext make all' 2262a52ca7cSTejun Heo @echo '' 2272a52ca7cSTejun Heo @echo 'will compile all schedulers, and emit the build artifacts to' 2282a52ca7cSTejun Heo @echo '/tmp/sched_ext/build.' 2292a52ca7cSTejun Heo @echo '' 2302a52ca7cSTejun Heo @echo '' 2312a52ca7cSTejun Heo @echo 'Installing targets' 2322a52ca7cSTejun Heo @echo '==================' 2332a52ca7cSTejun Heo @echo '' 2342a52ca7cSTejun Heo @echo ' install - Compile and install all schedulers to /usr/bin.' 2352a52ca7cSTejun Heo @echo ' You may specify the DESTDIR= environment variable' 2362a52ca7cSTejun Heo @echo ' to indicate a prefix for /usr/bin. For example:' 2372a52ca7cSTejun Heo @echo '' 2382a52ca7cSTejun Heo @echo ' DESTDIR=/tmp/sched_ext make install' 2392a52ca7cSTejun Heo @echo '' 2402a52ca7cSTejun Heo @echo ' will build the schedulers in CWD/build, and' 2412a52ca7cSTejun Heo @echo ' install the schedulers to /tmp/sched_ext/usr/bin.' 2422a52ca7cSTejun Heo @echo '' 2432a52ca7cSTejun Heo @echo '' 2442a52ca7cSTejun Heo @echo 'Cleaning targets' 2452a52ca7cSTejun Heo @echo '================' 2462a52ca7cSTejun Heo @echo '' 2472a52ca7cSTejun Heo @echo ' clean - Remove all generated files' 2482a52ca7cSTejun Heo 2492a52ca7cSTejun Heoall_targets: $(c-sched-targets) 2502a52ca7cSTejun Heo 2512a52ca7cSTejun Heo.PHONY: all all_targets $(c-sched-targets) clean help 2522a52ca7cSTejun Heo 2532a52ca7cSTejun Heo# delete failed targets 2542a52ca7cSTejun Heo.DELETE_ON_ERROR: 2552a52ca7cSTejun Heo 2562a52ca7cSTejun Heo# keep intermediate (.bpf.skel.h, .bpf.o, etc) targets 2572a52ca7cSTejun Heo.SECONDARY: 258