tools/testing/selftests/sched_ext/Makefile

   1 # SPDX-License-Identifier: GPL-2.0
   2 # Copyright (c) 2022 Meta Platforms, Inc. and affiliates.
   3 include ../../../build/Build.include
   4 include ../../../scripts/Makefile.arch
   5 include ../../../scripts/Makefile.include
   6
   7 TEST_GEN_PROGS := runner
   8
   9 # override lib.mk's default rules
  10 OVERRIDE_TARGETS := 1
  11 include ../lib.mk
  12
  13 CURDIR := $(abspath .)
  14 REPOROOT := $(abspath ../../../..)
  15 TOOLSDIR := $(REPOROOT)/tools
  16 LIBDIR := $(TOOLSDIR)/lib
  17 BPFDIR := $(LIBDIR)/bpf
  18 TOOLSINCDIR := $(TOOLSDIR)/include
  19 BPFTOOLDIR := $(TOOLSDIR)/bpf/bpftool
  20 APIDIR := $(TOOLSINCDIR)/uapi
  21 GENDIR := $(REPOROOT)/include/generated
  22 GENHDR := $(GENDIR)/autoconf.h
  23 SCXTOOLSDIR := $(TOOLSDIR)/sched_ext
  24 SCXTOOLSINCDIR := $(TOOLSDIR)/sched_ext/include
  25
  26 OUTPUT_DIR := $(OUTPUT)/build
  27 OBJ_DIR := $(OUTPUT_DIR)/obj
  28 INCLUDE_DIR := $(OUTPUT_DIR)/include
  29 BPFOBJ_DIR := $(OBJ_DIR)/libbpf
  30 SCXOBJ_DIR := $(OBJ_DIR)/sched_ext
  31 BPFOBJ := $(BPFOBJ_DIR)/libbpf.a
  32 LIBBPF_OUTPUT := $(OBJ_DIR)/libbpf/libbpf.a
  33
  34 DEFAULT_BPFTOOL := $(OUTPUT_DIR)/host/sbin/bpftool
  35 HOST_OBJ_DIR := $(OBJ_DIR)/host/bpftool
  36 HOST_LIBBPF_OUTPUT := $(OBJ_DIR)/host/libbpf/
  37 HOST_LIBBPF_DESTDIR := $(OUTPUT_DIR)/host/
  38 HOST_DESTDIR := $(OUTPUT_DIR)/host/
  39
  40 VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux)                                    \
  41                      $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)            \
  42                      ../../../../vmlinux                                        \
  43                      /sys/kernel/btf/vmlinux                                    \
  44                      /boot/vmlinux-$(shell uname -r)
  45 VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
  46 ifeq ($(VMLINUX_BTF),)
  47 $(error Cannot find a vmlinux for VMLINUX_BTF at any of "$(VMLINUX_BTF_PATHS)")
  48 endif
  49
  50 BPFTOOL ?= $(DEFAULT_BPFTOOL)
  51
  52 ifneq ($(wildcard $(GENHDR)),)
  53   GENFLAGS := -DHAVE_GENHDR
  54 endif
  55
  56 CFLAGS += -g -O2 -rdynamic -pthread -Wall -Werror $(GENFLAGS)                   \
  57           -I$(INCLUDE_DIR) -I$(GENDIR) -I$(LIBDIR)                              \
  58           -I$(TOOLSINCDIR) -I$(APIDIR) -I$(CURDIR)/include -I$(SCXTOOLSINCDIR)
  59
  60 # Silence some warnings when compiled with clang
  61 ifneq ($(LLVM),)
  62 CFLAGS += -Wno-unused-command-line-argument
  63 endif
  64
  65 LDFLAGS = -lelf -lz -lpthread -lzstd
  66
  67 IS_LITTLE_ENDIAN = $(shell $(CC) -dM -E - </dev/null |                          \
  68                         grep 'define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__')
  69
  70 # Get Clang's default includes on this system, as opposed to those seen by
  71 # '-target bpf'. This fixes "missing" files on some architectures/distros,
  72 # such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc.
  73 #
  74 # Use '-idirafter': Don't interfere with include mechanics except where the
  75 # build would have failed anyways.
  76 define get_sys_includes
  77 $(shell $(1) $(2) -v -E - </dev/null 2>&1 \
  78         | sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') \
  79 $(shell $(1) $(2) -dM -E - </dev/null | grep '__riscv_xlen ' | awk '{printf("-D__riscv_xlen=%d -D__BITS_PER_LONG=%d", $$3, $$3)}')
  80 endef
  81
  82 ifneq ($(CROSS_COMPILE),)
  83 CLANG_TARGET_ARCH = --target=$(notdir $(CROSS_COMPILE:%-=%))
  84 endif
  85
  86 CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG),$(CLANG_TARGET_ARCH))
  87
  88 BPF_CFLAGS = -g -D__TARGET_ARCH_$(SRCARCH)                                      \
  89              $(if $(IS_LITTLE_ENDIAN),-mlittle-endian,-mbig-endian)             \
  90              -I$(CURDIR)/include -I$(CURDIR)/include/bpf-compat                 \
  91              -I$(INCLUDE_DIR) -I$(APIDIR) -I$(SCXTOOLSINCDIR)                   \
  92              -I$(REPOROOT)/include                                              \
  93              $(CLANG_SYS_INCLUDES)                                              \
  94              -Wall -Wno-compare-distinct-pointer-types                          \
  95              -Wno-incompatible-function-pointer-types                           \
  96              -O2 -mcpu=v3
  97
  98 # sort removes libbpf duplicates when not cross-building
  99 MAKE_DIRS := $(sort $(OBJ_DIR)/libbpf $(OBJ_DIR)/libbpf                         \
 100                $(OBJ_DIR)/bpftool $(OBJ_DIR)/resolve_btfids                     \
 101                $(HOST_OBJ_DIR) $(INCLUDE_DIR) $(SCXOBJ_DIR))
 102
 103 $(MAKE_DIRS):
 104         $(call msg,MKDIR,,$@)
 105         $(Q)mkdir -p $@
 106
 107 $(BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile)                      \
 108            $(APIDIR)/linux/bpf.h                                                \
 109            | $(OBJ_DIR)/libbpf
 110         $(Q)$(MAKE) $(submake_extras) -C $(BPFDIR) OUTPUT=$(OBJ_DIR)/libbpf/    \
 111                     ARCH=$(ARCH) CC="$(CC)" CROSS_COMPILE=$(CROSS_COMPILE)      \
 112                     EXTRA_CFLAGS='-g -O0 -fPIC'                                 \
 113                     DESTDIR=$(OUTPUT_DIR) prefix= all install_headers
 114
 115 $(DEFAULT_BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile)     \
 116                     $(LIBBPF_OUTPUT) | $(HOST_OBJ_DIR)
 117         $(Q)$(MAKE) $(submake_extras)  -C $(BPFTOOLDIR)                         \
 118                     ARCH= CROSS_COMPILE= CC=$(HOSTCC) LD=$(HOSTLD)              \
 119                     EXTRA_CFLAGS='-g -O0'                                       \
 120                     OUTPUT=$(HOST_OBJ_DIR)/                                     \
 121                     LIBBPF_OUTPUT=$(HOST_LIBBPF_OUTPUT)                         \
 122                     LIBBPF_DESTDIR=$(HOST_LIBBPF_DESTDIR)                       \
 123                     prefix= DESTDIR=$(HOST_DESTDIR) install-bin
 124
 125 $(INCLUDE_DIR)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL) | $(INCLUDE_DIR)
 126 ifeq ($(VMLINUX_H),)
 127         $(call msg,GEN,,$@)
 128         $(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF) format c > $@
 129 else
 130         $(call msg,CP,,$@)
 131         $(Q)cp "$(VMLINUX_H)" $@
 132 endif
 133
 134 $(SCXOBJ_DIR)/%.bpf.o: %.bpf.c $(INCLUDE_DIR)/vmlinux.h | $(BPFOBJ) $(SCXOBJ_DIR)
 135         $(call msg,CLNG-BPF,,$(notdir $@))
 136         $(Q)$(CLANG) $(BPF_CFLAGS) -target bpf -c $< -o $@
 137
 138 $(INCLUDE_DIR)/%.bpf.skel.h: $(SCXOBJ_DIR)/%.bpf.o $(INCLUDE_DIR)/vmlinux.h $(BPFTOOL) | $(INCLUDE_DIR)
 139         $(eval sched=$(notdir $@))
 140         $(call msg,GEN-SKEL,,$(sched))
 141         $(Q)$(BPFTOOL) gen object $(<:.o=.linked1.o) $<
 142         $(Q)$(BPFTOOL) gen object $(<:.o=.linked2.o) $(<:.o=.linked1.o)
 143         $(Q)$(BPFTOOL) gen object $(<:.o=.linked3.o) $(<:.o=.linked2.o)
 144         $(Q)diff $(<:.o=.linked2.o) $(<:.o=.linked3.o)
 145         $(Q)$(BPFTOOL) gen skeleton $(<:.o=.linked3.o) name $(subst .bpf.skel.h,,$(sched)) > $@
 146         $(Q)$(BPFTOOL) gen subskeleton $(<:.o=.linked3.o) name $(subst .bpf.skel.h,,$(sched)) > $(@:.skel.h=.subskel.h)
 147
 148 ################
 149 # C schedulers #
 150 ################
 151
 152 override define CLEAN
 153         rm -rf $(OUTPUT_DIR)
 154         rm -f $(TEST_GEN_PROGS)
 155 endef
 156
 157 # Every testcase takes all of the BPF progs are dependencies by default. This
 158 # allows testcases to load any BPF scheduler, which is useful for testcases
 159 # that don't need their own prog to run their test.
 160 all_test_bpfprogs := $(foreach prog,$(wildcard *.bpf.c),$(INCLUDE_DIR)/$(patsubst %.c,%.skel.h,$(prog)))
 161
 162 auto-test-targets :=                    \
 163         create_dsq                      \
 164         enq_last_no_enq_fails           \
 165         enq_select_cpu_fails            \
 166         ddsp_bogus_dsq_fail             \
 167         ddsp_vtimelocal_fail            \
 168         dsp_local_on                    \
 169         exit                            \
 170         hotplug                         \
 171         init_enable_count               \
 172         maximal                         \
 173         maybe_null                      \
 174         minimal                         \
 175         prog_run                        \
 176         reload_loop                     \
 177         select_cpu_dfl                  \
 178         select_cpu_dfl_nodispatch       \
 179         select_cpu_dispatch             \
 180         select_cpu_dispatch_bad_dsq     \
 181         select_cpu_dispatch_dbl_dsp     \
 182         select_cpu_vtime                \
 183         test_example                    \
 184
 185 testcase-targets := $(addsuffix .o,$(addprefix $(SCXOBJ_DIR)/,$(auto-test-targets)))
 186
 187 $(SCXOBJ_DIR)/runner.o: runner.c | $(SCXOBJ_DIR) $(BPFOBJ)
 188         $(CC) $(CFLAGS) -c $< -o $@
 189
 190 # Create all of the test targets object files, whose testcase objects will be
 191 # registered into the runner in ELF constructors.
 192 #
 193 # Note that we must do double expansion here in order to support conditionally
 194 # compiling BPF object files only if one is present, as the wildcard Make
 195 # function doesn't support using implicit rules otherwise.
 196 $(testcase-targets): $(SCXOBJ_DIR)/%.o: %.c $(SCXOBJ_DIR)/runner.o $(all_test_bpfprogs) | $(SCXOBJ_DIR)
 197         $(eval test=$(patsubst %.o,%.c,$(notdir $@)))
 198         $(CC) $(CFLAGS) -c $< -o $@
 199
 200 $(SCXOBJ_DIR)/util.o: util.c | $(SCXOBJ_DIR)
 201         $(CC) $(CFLAGS) -c $< -o $@
 202
 203 $(OUTPUT)/runner: $(SCXOBJ_DIR)/runner.o $(SCXOBJ_DIR)/util.o $(BPFOBJ) $(testcase-targets)
 204         @echo "$(testcase-targets)"
 205         $(CC) $(CFLAGS) -o $@ $^ $(LDFLAGS)
 206
 207 .DEFAULT_GOAL := all
 208
 209 .DELETE_ON_ERROR:
 210
 211 .SECONDARY: