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-wacom.sh 18 19CXX ?= $(CROSS_COMPILE)g++ 20 21HOSTPKG_CONFIG := pkg-config 22 23CFLAGS += -g -O0 -rdynamic -Wall -Werror -I$(KHDR_INCLUDES) -I$(OUTPUT) 24LDLIBS += -lelf -lz -lrt -lpthread 25 26# Silence some warnings when compiled with clang 27ifneq ($(LLVM),) 28CFLAGS += -Wno-unused-command-line-argument 29endif 30 31# Order correspond to 'make run_tests' order 32TEST_GEN_PROGS = hid_bpf 33 34# Emit succinct information message describing current building step 35# $1 - generic step name (e.g., CC, LINK, etc); 36# $2 - optional "flavor" specifier; if provided, will be emitted as [flavor]; 37# $3 - target (assumed to be file); only file name will be emitted; 38# $4 - optional extra arg, emitted as-is, if provided. 39ifeq ($(V),1) 40Q = 41msg = 42else 43Q = @ 44msg = @printf ' %-8s%s %s%s\n' "$(1)" "$(if $(2), [$(2)])" "$(notdir $(3))" "$(if $(4), $(4))"; 45MAKEFLAGS += --no-print-directory 46submake_extras := feature_display=0 47endif 48 49# override lib.mk's default rules 50OVERRIDE_TARGETS := 1 51override define CLEAN 52 $(call msg,CLEAN) 53 $(Q)$(RM) -r $(TEST_GEN_PROGS) 54 $(Q)$(RM) -r $(EXTRA_CLEAN) 55endef 56 57include ../lib.mk 58 59TOOLSDIR := $(top_srcdir)/tools 60LIBDIR := $(TOOLSDIR)/lib 61BPFDIR := $(LIBDIR)/bpf 62TOOLSINCDIR := $(TOOLSDIR)/include 63BPFTOOLDIR := $(TOOLSDIR)/bpf/bpftool 64SCRATCH_DIR := $(OUTPUT)/tools 65BUILD_DIR := $(SCRATCH_DIR)/build 66INCLUDE_DIR := $(SCRATCH_DIR)/include 67KHDR_INCLUDES := $(SCRATCH_DIR)/uapi/include 68BPFOBJ := $(BUILD_DIR)/libbpf/libbpf.a 69ifneq ($(CROSS_COMPILE),) 70HOST_BUILD_DIR := $(BUILD_DIR)/host 71HOST_SCRATCH_DIR := $(OUTPUT)/host-tools 72HOST_INCLUDE_DIR := $(HOST_SCRATCH_DIR)/include 73else 74HOST_BUILD_DIR := $(BUILD_DIR) 75HOST_SCRATCH_DIR := $(SCRATCH_DIR) 76HOST_INCLUDE_DIR := $(INCLUDE_DIR) 77endif 78HOST_BPFOBJ := $(HOST_BUILD_DIR)/libbpf/libbpf.a 79RESOLVE_BTFIDS := $(HOST_BUILD_DIR)/resolve_btfids/resolve_btfids 80 81VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux) \ 82 $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux) \ 83 ../../../../vmlinux \ 84 /sys/kernel/btf/vmlinux \ 85 /boot/vmlinux-$(shell uname -r) 86VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS)))) 87ifeq ($(VMLINUX_BTF),) 88$(error Cannot find a vmlinux for VMLINUX_BTF at any of "$(VMLINUX_BTF_PATHS)") 89endif 90 91# Define simple and short `make test_progs`, `make test_sysctl`, etc targets 92# to build individual tests. 93# NOTE: Semicolon at the end is critical to override lib.mk's default static 94# rule for binaries. 95$(notdir $(TEST_GEN_PROGS)): %: $(OUTPUT)/% ; 96 97# sort removes libbpf duplicates when not cross-building 98MAKE_DIRS := $(sort $(BUILD_DIR)/libbpf $(HOST_BUILD_DIR)/libbpf \ 99 $(HOST_BUILD_DIR)/bpftool $(HOST_BUILD_DIR)/resolve_btfids \ 100 $(INCLUDE_DIR)) 101$(MAKE_DIRS): 102 $(call msg,MKDIR,,$@) 103 $(Q)mkdir -p $@ 104 105# LLVM's ld.lld doesn't support all the architectures, so use it only on x86 106ifeq ($(SRCARCH),x86) 107LLD := lld 108else 109LLD := ld 110endif 111 112DEFAULT_BPFTOOL := $(HOST_SCRATCH_DIR)/sbin/bpftool 113 114TEST_GEN_PROGS_EXTENDED += $(DEFAULT_BPFTOOL) 115 116$(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED): $(BPFOBJ) 117 118BPFTOOL ?= $(DEFAULT_BPFTOOL) 119$(DEFAULT_BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile) \ 120 $(HOST_BPFOBJ) | $(HOST_BUILD_DIR)/bpftool 121 $(Q)$(MAKE) $(submake_extras) -C $(BPFTOOLDIR) \ 122 ARCH= CROSS_COMPILE= CC=$(HOSTCC) LD=$(HOSTLD) \ 123 EXTRA_CFLAGS='-g -O0' \ 124 OUTPUT=$(HOST_BUILD_DIR)/bpftool/ \ 125 LIBBPF_OUTPUT=$(HOST_BUILD_DIR)/libbpf/ \ 126 LIBBPF_DESTDIR=$(HOST_SCRATCH_DIR)/ \ 127 prefix= DESTDIR=$(HOST_SCRATCH_DIR)/ install-bin 128 129$(BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile) \ 130 | $(BUILD_DIR)/libbpf 131 $(Q)$(MAKE) $(submake_extras) -C $(BPFDIR) OUTPUT=$(BUILD_DIR)/libbpf/ \ 132 EXTRA_CFLAGS='-g -O0' \ 133 DESTDIR=$(SCRATCH_DIR) prefix= all install_headers 134 135ifneq ($(BPFOBJ),$(HOST_BPFOBJ)) 136$(HOST_BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile) \ 137 | $(HOST_BUILD_DIR)/libbpf 138 $(Q)$(MAKE) $(submake_extras) -C $(BPFDIR) \ 139 EXTRA_CFLAGS='-g -O0' ARCH= CROSS_COMPILE= \ 140 OUTPUT=$(HOST_BUILD_DIR)/libbpf/ CC=$(HOSTCC) LD=$(HOSTLD) \ 141 DESTDIR=$(HOST_SCRATCH_DIR)/ prefix= all install_headers 142endif 143 144$(INCLUDE_DIR)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL) | $(INCLUDE_DIR) 145ifeq ($(VMLINUX_H),) 146 $(call msg,GEN,,$@) 147 $(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF) format c > $@ 148else 149 $(call msg,CP,,$@) 150 $(Q)cp "$(VMLINUX_H)" $@ 151endif 152 153$(KHDR_INCLUDES)/linux/hid.h: $(top_srcdir)/include/uapi/linux/hid.h 154 $(MAKE) -C $(top_srcdir) INSTALL_HDR_PATH=$(SCRATCH_DIR)/uapi headers_install 155 156$(RESOLVE_BTFIDS): $(HOST_BPFOBJ) | $(HOST_BUILD_DIR)/resolve_btfids \ 157 $(TOOLSDIR)/bpf/resolve_btfids/main.c \ 158 $(TOOLSDIR)/lib/rbtree.c \ 159 $(TOOLSDIR)/lib/zalloc.c \ 160 $(TOOLSDIR)/lib/string.c \ 161 $(TOOLSDIR)/lib/ctype.c \ 162 $(TOOLSDIR)/lib/str_error_r.c 163 $(Q)$(MAKE) $(submake_extras) -C $(TOOLSDIR)/bpf/resolve_btfids \ 164 CC=$(HOSTCC) LD=$(HOSTLD) AR=$(HOSTAR) \ 165 LIBBPF_INCLUDE=$(HOST_INCLUDE_DIR) \ 166 OUTPUT=$(HOST_BUILD_DIR)/resolve_btfids/ BPFOBJ=$(HOST_BPFOBJ) 167 168# Get Clang's default includes on this system, as opposed to those seen by 169# '-target bpf'. This fixes "missing" files on some architectures/distros, 170# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc. 171# 172# Use '-idirafter': Don't interfere with include mechanics except where the 173# build would have failed anyways. 174define get_sys_includes 175$(shell $(1) -v -E - </dev/null 2>&1 \ 176 | sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') \ 177$(shell $(1) -dM -E - </dev/null | grep '__riscv_xlen ' | awk '{printf("-D__riscv_xlen=%d -D__BITS_PER_LONG=%d", $$3, $$3)}') 178endef 179 180# Determine target endianness. 181IS_LITTLE_ENDIAN = $(shell $(CC) -dM -E - </dev/null | \ 182 grep 'define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__') 183MENDIAN=$(if $(IS_LITTLE_ENDIAN),-mlittle-endian,-mbig-endian) 184 185CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG)) 186BPF_CFLAGS = -g -Werror -D__TARGET_ARCH_$(SRCARCH) $(MENDIAN) \ 187 -I$(INCLUDE_DIR) 188 189CLANG_CFLAGS = $(CLANG_SYS_INCLUDES) \ 190 -Wno-compare-distinct-pointer-types 191 192# Build BPF object using Clang 193# $1 - input .c file 194# $2 - output .o file 195# $3 - CFLAGS 196define CLANG_BPF_BUILD_RULE 197 $(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2) 198 $(Q)$(CLANG) $3 -O2 -target bpf -c $1 -mcpu=v3 -o $2 199endef 200# Similar to CLANG_BPF_BUILD_RULE, but with disabled alu32 201define CLANG_NOALU32_BPF_BUILD_RULE 202 $(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2) 203 $(Q)$(CLANG) $3 -O2 -target bpf -c $1 -mcpu=v2 -o $2 204endef 205# Build BPF object using GCC 206define GCC_BPF_BUILD_RULE 207 $(call msg,GCC-BPF,$(TRUNNER_BINARY),$2) 208 $(Q)$(BPF_GCC) $3 -O2 -c $1 -o $2 209endef 210 211BPF_PROGS_DIR := progs 212BPF_BUILD_RULE := CLANG_BPF_BUILD_RULE 213BPF_SRCS := $(notdir $(wildcard $(BPF_PROGS_DIR)/*.c)) 214BPF_OBJS := $(patsubst %.c,$(OUTPUT)/%.bpf.o, $(BPF_SRCS)) 215BPF_SKELS := $(patsubst %.c,$(OUTPUT)/%.skel.h, $(BPF_SRCS)) 216TEST_GEN_FILES += $(BPF_OBJS) 217 218$(BPF_PROGS_DIR)-bpfobjs := y 219$(BPF_OBJS): $(OUTPUT)/%.bpf.o: \ 220 $(BPF_PROGS_DIR)/%.c \ 221 $(wildcard $(BPF_PROGS_DIR)/*.h) \ 222 $(INCLUDE_DIR)/vmlinux.h \ 223 $(wildcard $(BPFDIR)/hid_bpf_*.h) \ 224 $(wildcard $(BPFDIR)/*.bpf.h) \ 225 | $(OUTPUT) $(BPFOBJ) 226 $(call $(BPF_BUILD_RULE),$<,$@, $(BPF_CFLAGS)) 227 228$(BPF_SKELS): %.skel.h: %.bpf.o $(BPFTOOL) | $(OUTPUT) 229 $(call msg,GEN-SKEL,$(BINARY),$@) 230 $(Q)$(BPFTOOL) gen object $(<:.o=.linked1.o) $< 231 $(Q)$(BPFTOOL) gen skeleton $(<:.o=.linked1.o) name $(notdir $(<:.bpf.o=)) > $@ 232 233$(OUTPUT)/%.o: %.c $(BPF_SKELS) $(KHDR_INCLUDES)/linux/hid.h 234 $(call msg,CC,,$@) 235 $(Q)$(CC) $(CFLAGS) -c $(filter %.c,$^) $(LDLIBS) -o $@ 236 237$(OUTPUT)/%: $(OUTPUT)/%.o 238 $(call msg,BINARY,,$@) 239 $(Q)$(LINK.c) $^ $(LDLIBS) -o $@ 240 241EXTRA_CLEAN := $(SCRATCH_DIR) $(HOST_SCRATCH_DIR) feature bpftool \ 242 $(addprefix $(OUTPUT)/,*.o *.skel.h no_alu32) 243