1# SPDX-License-Identifier: GPL-2.0 2 3# based on tools/testing/selftest/bpf/Makefile 4include ../../../build/Build.include 5include ../../../scripts/Makefile.arch 6include ../../../scripts/Makefile.include 7 8TEST_PROGS := hid-core.sh 9TEST_PROGS += hid-apple.sh 10TEST_PROGS += hid-gamepad.sh 11TEST_PROGS += hid-ite.sh 12TEST_PROGS += hid-keyboard.sh 13TEST_PROGS += hid-mouse.sh 14TEST_PROGS += hid-multitouch.sh 15TEST_PROGS += hid-sony.sh 16TEST_PROGS += hid-tablet.sh 17TEST_PROGS += hid-usb_crash.sh 18TEST_PROGS += hid-wacom.sh 19 20CXX ?= $(CROSS_COMPILE)g++ 21 22HOSTPKG_CONFIG := pkg-config 23 24CFLAGS += -g -O0 -rdynamic -Wall -Werror -I$(OUTPUT) 25CFLAGS += -I$(OUTPUT)/tools/include 26 27LDLIBS += -lelf -lz -lrt -lpthread 28 29# Silence some warnings when compiled with clang 30ifneq ($(LLVM),) 31CFLAGS += -Wno-unused-command-line-argument 32endif 33 34# Order correspond to 'make run_tests' order 35TEST_GEN_PROGS = hid_bpf 36 37# Emit succinct information message describing current building step 38# $1 - generic step name (e.g., CC, LINK, etc); 39# $2 - optional "flavor" specifier; if provided, will be emitted as [flavor]; 40# $3 - target (assumed to be file); only file name will be emitted; 41# $4 - optional extra arg, emitted as-is, if provided. 42ifeq ($(V),1) 43Q = 44msg = 45else 46Q = @ 47msg = @printf ' %-8s%s %s%s\n' "$(1)" "$(if $(2), [$(2)])" "$(notdir $(3))" "$(if $(4), $(4))"; 48MAKEFLAGS += --no-print-directory 49submake_extras := feature_display=0 50endif 51 52# override lib.mk's default rules 53OVERRIDE_TARGETS := 1 54override define CLEAN 55 $(call msg,CLEAN) 56 $(Q)$(RM) -r $(TEST_GEN_PROGS) 57 $(Q)$(RM) -r $(EXTRA_CLEAN) 58endef 59 60include ../lib.mk 61 62TOOLSDIR := $(top_srcdir)/tools 63LIBDIR := $(TOOLSDIR)/lib 64BPFDIR := $(LIBDIR)/bpf 65TOOLSINCDIR := $(TOOLSDIR)/include 66BPFTOOLDIR := $(TOOLSDIR)/bpf/bpftool 67SCRATCH_DIR := $(OUTPUT)/tools 68BUILD_DIR := $(SCRATCH_DIR)/build 69INCLUDE_DIR := $(SCRATCH_DIR)/include 70BPFOBJ := $(BUILD_DIR)/libbpf/libbpf.a 71ifneq ($(CROSS_COMPILE),) 72HOST_BUILD_DIR := $(BUILD_DIR)/host 73HOST_SCRATCH_DIR := $(OUTPUT)/host-tools 74HOST_INCLUDE_DIR := $(HOST_SCRATCH_DIR)/include 75else 76HOST_BUILD_DIR := $(BUILD_DIR) 77HOST_SCRATCH_DIR := $(SCRATCH_DIR) 78HOST_INCLUDE_DIR := $(INCLUDE_DIR) 79endif 80HOST_BPFOBJ := $(HOST_BUILD_DIR)/libbpf/libbpf.a 81RESOLVE_BTFIDS := $(HOST_BUILD_DIR)/resolve_btfids/resolve_btfids 82 83VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux) \ 84 $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux) \ 85 ../../../../vmlinux \ 86 /sys/kernel/btf/vmlinux \ 87 /boot/vmlinux-$(shell uname -r) 88VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS)))) 89ifeq ($(VMLINUX_BTF),) 90$(error Cannot find a vmlinux for VMLINUX_BTF at any of "$(VMLINUX_BTF_PATHS)") 91endif 92 93# Define simple and short `make test_progs`, `make test_sysctl`, etc targets 94# to build individual tests. 95# NOTE: Semicolon at the end is critical to override lib.mk's default static 96# rule for binaries. 97$(notdir $(TEST_GEN_PROGS)): %: $(OUTPUT)/% ; 98 99# sort removes libbpf duplicates when not cross-building 100MAKE_DIRS := $(sort $(BUILD_DIR)/libbpf $(HOST_BUILD_DIR)/libbpf \ 101 $(HOST_BUILD_DIR)/bpftool $(HOST_BUILD_DIR)/resolve_btfids \ 102 $(INCLUDE_DIR)) 103$(MAKE_DIRS): 104 $(call msg,MKDIR,,$@) 105 $(Q)mkdir -p $@ 106 107# LLVM's ld.lld doesn't support all the architectures, so use it only on x86 108ifeq ($(SRCARCH),x86) 109LLD := lld 110else 111LLD := ld 112endif 113 114DEFAULT_BPFTOOL := $(HOST_SCRATCH_DIR)/sbin/bpftool 115 116TEST_GEN_PROGS_EXTENDED += $(DEFAULT_BPFTOOL) 117 118$(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED): $(BPFOBJ) 119 120BPFTOOL ?= $(DEFAULT_BPFTOOL) 121$(DEFAULT_BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile) \ 122 $(HOST_BPFOBJ) | $(HOST_BUILD_DIR)/bpftool 123 $(Q)$(MAKE) $(submake_extras) -C $(BPFTOOLDIR) \ 124 ARCH= CROSS_COMPILE= CC=$(HOSTCC) LD=$(HOSTLD) \ 125 EXTRA_CFLAGS='-g -O0' \ 126 OUTPUT=$(HOST_BUILD_DIR)/bpftool/ \ 127 LIBBPF_OUTPUT=$(HOST_BUILD_DIR)/libbpf/ \ 128 LIBBPF_DESTDIR=$(HOST_SCRATCH_DIR)/ \ 129 prefix= DESTDIR=$(HOST_SCRATCH_DIR)/ install-bin 130 131$(BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile) \ 132 | $(BUILD_DIR)/libbpf 133 $(Q)$(MAKE) $(submake_extras) -C $(BPFDIR) OUTPUT=$(BUILD_DIR)/libbpf/ \ 134 EXTRA_CFLAGS='-g -O0' \ 135 DESTDIR=$(SCRATCH_DIR) prefix= all install_headers 136 137ifneq ($(BPFOBJ),$(HOST_BPFOBJ)) 138$(HOST_BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile) \ 139 | $(HOST_BUILD_DIR)/libbpf 140 $(Q)$(MAKE) $(submake_extras) -C $(BPFDIR) \ 141 EXTRA_CFLAGS='-g -O0' ARCH= CROSS_COMPILE= \ 142 OUTPUT=$(HOST_BUILD_DIR)/libbpf/ CC=$(HOSTCC) LD=$(HOSTLD) \ 143 DESTDIR=$(HOST_SCRATCH_DIR)/ prefix= all install_headers 144endif 145 146$(INCLUDE_DIR)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL) | $(INCLUDE_DIR) 147ifeq ($(VMLINUX_H),) 148 $(call msg,GEN,,$@) 149 $(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF) format c > $@ 150else 151 $(call msg,CP,,$@) 152 $(Q)cp "$(VMLINUX_H)" $@ 153endif 154 155$(RESOLVE_BTFIDS): $(HOST_BPFOBJ) | $(HOST_BUILD_DIR)/resolve_btfids \ 156 $(TOOLSDIR)/bpf/resolve_btfids/main.c \ 157 $(TOOLSDIR)/lib/rbtree.c \ 158 $(TOOLSDIR)/lib/zalloc.c \ 159 $(TOOLSDIR)/lib/string.c \ 160 $(TOOLSDIR)/lib/ctype.c \ 161 $(TOOLSDIR)/lib/str_error_r.c 162 $(Q)$(MAKE) $(submake_extras) -C $(TOOLSDIR)/bpf/resolve_btfids \ 163 CC=$(HOSTCC) LD=$(HOSTLD) AR=$(HOSTAR) \ 164 LIBBPF_INCLUDE=$(HOST_INCLUDE_DIR) \ 165 OUTPUT=$(HOST_BUILD_DIR)/resolve_btfids/ BPFOBJ=$(HOST_BPFOBJ) 166 167# Get Clang's default includes on this system, as opposed to those seen by 168# '--target=bpf'. This fixes "missing" files on some architectures/distros, 169# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc. 170# 171# Use '-idirafter': Don't interfere with include mechanics except where the 172# build would have failed anyways. 173define get_sys_includes 174$(shell $(1) -v -E - </dev/null 2>&1 \ 175 | sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') \ 176$(shell $(1) -dM -E - </dev/null | grep '__riscv_xlen ' | awk '{printf("-D__riscv_xlen=%d -D__BITS_PER_LONG=%d", $$3, $$3)}') 177endef 178 179# Determine target endianness. 180IS_LITTLE_ENDIAN = $(shell $(CC) -dM -E - </dev/null | \ 181 grep 'define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__') 182MENDIAN=$(if $(IS_LITTLE_ENDIAN),-mlittle-endian,-mbig-endian) 183 184CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG)) 185BPF_CFLAGS = -g -Werror -D__TARGET_ARCH_$(SRCARCH) $(MENDIAN) \ 186 -I$(INCLUDE_DIR) 187 188CLANG_CFLAGS = $(CLANG_SYS_INCLUDES) \ 189 -Wno-compare-distinct-pointer-types 190 191# Build BPF object using Clang 192# $1 - input .c file 193# $2 - output .o file 194# $3 - CFLAGS 195define CLANG_BPF_BUILD_RULE 196 $(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2) 197 $(Q)$(CLANG) $3 -O2 --target=bpf -c $1 -mcpu=v3 -o $2 198endef 199# Similar to CLANG_BPF_BUILD_RULE, but with disabled alu32 200define CLANG_NOALU32_BPF_BUILD_RULE 201 $(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2) 202 $(Q)$(CLANG) $3 -O2 --target=bpf -c $1 -mcpu=v2 -o $2 203endef 204# Build BPF object using GCC 205define GCC_BPF_BUILD_RULE 206 $(call msg,GCC-BPF,$(TRUNNER_BINARY),$2) 207 $(Q)$(BPF_GCC) $3 -O2 -c $1 -o $2 208endef 209 210BPF_PROGS_DIR := progs 211BPF_BUILD_RULE := CLANG_BPF_BUILD_RULE 212BPF_SRCS := $(notdir $(wildcard $(BPF_PROGS_DIR)/*.c)) 213BPF_OBJS := $(patsubst %.c,$(OUTPUT)/%.bpf.o, $(BPF_SRCS)) 214BPF_SKELS := $(patsubst %.c,$(OUTPUT)/%.skel.h, $(BPF_SRCS)) 215TEST_GEN_FILES += $(BPF_OBJS) 216 217$(BPF_PROGS_DIR)-bpfobjs := y 218$(BPF_OBJS): $(OUTPUT)/%.bpf.o: \ 219 $(BPF_PROGS_DIR)/%.c \ 220 $(wildcard $(BPF_PROGS_DIR)/*.h) \ 221 $(INCLUDE_DIR)/vmlinux.h \ 222 $(wildcard $(BPFDIR)/hid_bpf_*.h) \ 223 $(wildcard $(BPFDIR)/*.bpf.h) \ 224 | $(OUTPUT) $(BPFOBJ) 225 $(call $(BPF_BUILD_RULE),$<,$@, $(BPF_CFLAGS)) 226 227$(BPF_SKELS): %.skel.h: %.bpf.o $(BPFTOOL) | $(OUTPUT) 228 $(call msg,GEN-SKEL,$(BINARY),$@) 229 $(Q)$(BPFTOOL) gen object $(<:.o=.linked1.o) $< 230 $(Q)$(BPFTOOL) gen skeleton $(<:.o=.linked1.o) name $(notdir $(<:.bpf.o=)) > $@ 231 232$(OUTPUT)/%.o: %.c $(BPF_SKELS) 233 $(call msg,CC,,$@) 234 $(Q)$(CC) $(CFLAGS) -c $(filter %.c,$^) $(LDLIBS) -o $@ 235 236$(OUTPUT)/%: $(OUTPUT)/%.o 237 $(call msg,BINARY,,$@) 238 $(Q)$(LINK.c) $^ $(LDLIBS) -o $@ 239 240EXTRA_CLEAN := $(SCRATCH_DIR) $(HOST_SCRATCH_DIR) feature bpftool \ 241 $(addprefix $(OUTPUT)/,*.o *.skel.h no_alu32) 242