xref: /linux/tools/sched_ext/Makefile (revision 74f1af95820fc2ee580a775a3a17c416db30b38c)
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