projects/linux·blob master · refs

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1# SPDX-License-Identifier: GPL-2.0
2# Copyright (c) 2022 Meta Platforms, Inc. and affiliates.
3include ../../../build/Build.include
4include ../../../scripts/Makefile.arch
5include ../../../scripts/Makefile.include
6
7TEST_GEN_PROGS := runner
8
9# override lib.mk's default rules
10OVERRIDE_TARGETS := 1
11include ../lib.mk
12
13CURDIR := $(abspath .)
14REPOROOT := $(abspath ../../../..)
15TOOLSDIR := $(REPOROOT)/tools
16LIBDIR := $(TOOLSDIR)/lib
17BPFDIR := $(LIBDIR)/bpf
18TOOLSINCDIR := $(TOOLSDIR)/include
19BPFTOOLDIR := $(TOOLSDIR)/bpf/bpftool
20APIDIR := $(TOOLSINCDIR)/uapi
21GENDIR := $(REPOROOT)/include/generated
22GENHDR := $(GENDIR)/autoconf.h
23SCXTOOLSDIR := $(TOOLSDIR)/sched_ext
24SCXTOOLSINCDIR := $(TOOLSDIR)/sched_ext/include
25
26OUTPUT_DIR := $(OUTPUT)/build
27OBJ_DIR := $(OUTPUT_DIR)/obj
28INCLUDE_DIR := $(OUTPUT_DIR)/include
29BPFOBJ_DIR := $(OBJ_DIR)/libbpf
30SCXOBJ_DIR := $(OBJ_DIR)/sched_ext
31BPFOBJ := $(BPFOBJ_DIR)/libbpf.a
32LIBBPF_OUTPUT := $(OBJ_DIR)/libbpf/libbpf.a
33
34DEFAULT_BPFTOOL := $(OUTPUT_DIR)/host/sbin/bpftool
35HOST_OBJ_DIR := $(OBJ_DIR)/host/bpftool
36HOST_LIBBPF_OUTPUT := $(OBJ_DIR)/host/libbpf/
37HOST_LIBBPF_DESTDIR := $(OUTPUT_DIR)/host/
38HOST_DESTDIR := $(OUTPUT_DIR)/host/
39
40VMLINUX_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)
45VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
46ifeq ($(VMLINUX_BTF),)
47$(error Cannot find a vmlinux for VMLINUX_BTF at any of "$(VMLINUX_BTF_PATHS)")
48endif
49
50BPFTOOL ?= $(DEFAULT_BPFTOOL)
51
52ifneq ($(wildcard $(GENHDR)),)
53 GENFLAGS := -DHAVE_GENHDR
54endif
55
56CFLAGS += -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
61ifneq ($(LLVM),)
62CFLAGS += -Wno-unused-command-line-argument
63endif
64
65LDFLAGS = -lelf -lz -lpthread -lzstd
66
67IS_LITTLE_ENDIAN = $(shell $(CC) -dM -E - </dev/null | \
68 grep 'define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__')
69
70# Get Clang's default includes on this system, as opposed to those seen by
71# '-target bpf'. This fixes "missing" files on some architectures/distros,
72# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc.
73#
74# Use '-idirafter': Don't interfere with include mechanics except where the
75# build would have failed anyways.
76define get_sys_includes
77$(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)}')
80endef
81
82ifneq ($(CROSS_COMPILE),)
83CLANG_TARGET_ARCH = --target=$(notdir $(CROSS_COMPILE:%-=%))
84endif
85
86CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG),$(CLANG_TARGET_ARCH))
87
88BPF_CFLAGS = -g -D__TARGET_ARCH_$(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 -Wno-microsoft-anon-tag \
97 -fms-extensions \
98 -O2 -mcpu=v3
99
100# sort removes libbpf duplicates when not cross-building
101MAKE_DIRS := $(sort $(OBJ_DIR)/libbpf $(OBJ_DIR)/libbpf \
102 $(OBJ_DIR)/bpftool $(OBJ_DIR)/resolve_btfids \
103 $(HOST_OBJ_DIR) $(INCLUDE_DIR) $(SCXOBJ_DIR))
104
105$(MAKE_DIRS):
106 $(call msg,MKDIR,,$@)
107 $(Q)mkdir -p $@
108
109$(BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile) \
110 $(APIDIR)/linux/bpf.h \
111 | $(OBJ_DIR)/libbpf
112 $(Q)$(MAKE) $(submake_extras) -C $(BPFDIR) OUTPUT=$(OBJ_DIR)/libbpf/ \
113 ARCH=$(ARCH) CC="$(CC)" CROSS_COMPILE=$(CROSS_COMPILE) \
114 EXTRA_CFLAGS='-g -O0 -fPIC' \
115 DESTDIR=$(OUTPUT_DIR) prefix= all install_headers
116
117$(DEFAULT_BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile) \
118 $(LIBBPF_OUTPUT) | $(HOST_OBJ_DIR)
119 $(Q)$(MAKE) $(submake_extras) -C $(BPFTOOLDIR) \
120 ARCH= CROSS_COMPILE= CC=$(HOSTCC) LD=$(HOSTLD) \
121 EXTRA_CFLAGS='-g -O0' \
122 OUTPUT=$(HOST_OBJ_DIR)/ \
123 LIBBPF_OUTPUT=$(HOST_LIBBPF_OUTPUT) \
124 LIBBPF_DESTDIR=$(HOST_LIBBPF_DESTDIR) \
125 prefix= DESTDIR=$(HOST_DESTDIR) install-bin
126
127$(INCLUDE_DIR)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL) | $(INCLUDE_DIR)
128ifeq ($(VMLINUX_H),)
129 $(call msg,GEN,,$@)
130 $(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF) format c > $@
131else
132 $(call msg,CP,,$@)
133 $(Q)cp "$(VMLINUX_H)" $@
134endif
135
136$(SCXOBJ_DIR)/%.bpf.o: %.bpf.c $(INCLUDE_DIR)/vmlinux.h | $(BPFOBJ) $(SCXOBJ_DIR)
137 $(call msg,CLNG-BPF,,$(notdir $@))
138 $(Q)$(CLANG) $(BPF_CFLAGS) -target bpf -c $< -o $@
139
140$(INCLUDE_DIR)/%.bpf.skel.h: $(SCXOBJ_DIR)/%.bpf.o $(INCLUDE_DIR)/vmlinux.h $(BPFTOOL) | $(INCLUDE_DIR)
141 $(eval sched=$(notdir $@))
142 $(call msg,GEN-SKEL,,$(sched))
143 $(Q)$(BPFTOOL) gen object $(<:.o=.linked1.o) $<
144 $(Q)$(BPFTOOL) gen object $(<:.o=.linked2.o) $(<:.o=.linked1.o)
145 $(Q)$(BPFTOOL) gen object $(<:.o=.linked3.o) $(<:.o=.linked2.o)
146 $(Q)diff $(<:.o=.linked2.o) $(<:.o=.linked3.o)
147 $(Q)$(BPFTOOL) gen skeleton $(<:.o=.linked3.o) name $(subst .bpf.skel.h,,$(sched)) > $@
148 $(Q)$(BPFTOOL) gen subskeleton $(<:.o=.linked3.o) name $(subst .bpf.skel.h,,$(sched)) > $(@:.skel.h=.subskel.h)
149
150################
151# C schedulers #
152################
153
154override define CLEAN
155 rm -rf $(OUTPUT_DIR)
156 rm -f $(TEST_GEN_PROGS)
157endef
158
159# Every testcase takes all of the BPF progs are dependencies by default. This
160# allows testcases to load any BPF scheduler, which is useful for testcases
161# that don't need their own prog to run their test.
162all_test_bpfprogs := $(foreach prog,$(wildcard *.bpf.c),$(INCLUDE_DIR)/$(patsubst %.c,%.skel.h,$(prog)))
163
164auto-test-targets := \
165 create_dsq \
166 dequeue \
167 dequeue_iter \
168 dequeue_remote \
169 enq_last_no_enq_fails \
170 ddsp_bogus_dsq_fail \
171 ddsp_vtimelocal_fail \
172 dsp_local_on \
173 enable_cmask \
174 enq_select_cpu \
175 exit \
176 hotplug \
177 init_enable_count \
178 maximal \
179 maybe_null \
180 minimal \
181 non_scx_kfunc_deny \
182 nohz_tick \
183 numa \
184 allowed_cpus \
185 peek_dsq \
186 prog_run \
187 reload_loop \
188 select_cpu_dfl \
189 select_cpu_dfl_nodispatch \
190 select_cpu_dispatch \
191 select_cpu_dispatch_bad_dsq \
192 select_cpu_dispatch_dbl_dsp \
193 select_cpu_vtime \
194 rt_stall \
195 test_example \
196 total_bw \
197 cyclic_kick_wait \
198
199testcase-targets := $(addsuffix .o,$(addprefix $(SCXOBJ_DIR)/,$(auto-test-targets)))
200
201$(SCXOBJ_DIR)/runner.o: runner.c | $(SCXOBJ_DIR) $(BPFOBJ)
202 $(CC) $(CFLAGS) -c $< -o $@
203
204# Create all of the test targets object files, whose testcase objects will be
205# registered into the runner in ELF constructors.
206#
207# Note that we must do double expansion here in order to support conditionally
208# compiling BPF object files only if one is present, as the wildcard Make
209# function doesn't support using implicit rules otherwise.
210$(testcase-targets): $(SCXOBJ_DIR)/%.o: %.c $(SCXOBJ_DIR)/runner.o $(all_test_bpfprogs) | $(SCXOBJ_DIR)
211 $(eval test=$(patsubst %.o,%.c,$(notdir $@)))
212 $(CC) $(CFLAGS) -c $< -o $@
213
214$(SCXOBJ_DIR)/util.o: util.c | $(SCXOBJ_DIR)
215 $(CC) $(CFLAGS) -c $< -o $@
216
217$(OUTPUT)/runner: $(SCXOBJ_DIR)/runner.o $(SCXOBJ_DIR)/util.o $(BPFOBJ) $(testcase-targets)
218 @echo "$(testcase-targets)"
219 $(CC) $(CFLAGS) -o $@ $^ $(LDFLAGS)
220
221.DEFAULT_GOAL := all
222
223.DELETE_ON_ERROR:
224
225.SECONDARY: