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