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 ?= $(CROSS_COMPILE)g++ 21 22HOSTPKG_CONFIG := pkg-config 23 24CFLAGS += -g -O0 -rdynamic -Wall -Werror -I$(KHDR_INCLUDES) -I$(OUTPUT) 25LDLIBS += -lelf -lz -lrt -lpthread 26 27# Silence some warnings when compiled with clang 28ifneq ($(LLVM),) 29CFLAGS += -Wno-unused-command-line-argument 30endif 31 32# Order correspond to 'make run_tests' order 33TEST_GEN_PROGS = hid_bpf 34 35# Emit succinct information message describing current building step 36# $1 - generic step name (e.g., CC, LINK, etc); 37# $2 - optional "flavor" specifier; if provided, will be emitted as [flavor]; 38# $3 - target (assumed to be file); only file name will be emitted; 39# $4 - optional extra arg, emitted as-is, if provided. 40ifeq ($(V),1) 41Q = 42msg = 43else 44Q = @ 45msg = @printf ' %-8s%s %s%s\n' "$(1)" "$(if $(2), [$(2)])" "$(notdir $(3))" "$(if $(4), $(4))"; 46MAKEFLAGS += --no-print-directory 47submake_extras := feature_display=0 48endif 49 50# override lib.mk's default rules 51OVERRIDE_TARGETS := 1 52override define CLEAN 53 $(call msg,CLEAN) 54 $(Q)$(RM) -r $(TEST_GEN_PROGS) 55 $(Q)$(RM) -r $(EXTRA_CLEAN) 56endef 57 58include ../lib.mk 59 60TOOLSDIR := $(top_srcdir)/tools 61LIBDIR := $(TOOLSDIR)/lib 62BPFDIR := $(LIBDIR)/bpf 63TOOLSINCDIR := $(TOOLSDIR)/include 64BPFTOOLDIR := $(TOOLSDIR)/bpf/bpftool 65SCRATCH_DIR := $(OUTPUT)/tools 66BUILD_DIR := $(SCRATCH_DIR)/build 67INCLUDE_DIR := $(SCRATCH_DIR)/include 68KHDR_INCLUDES := $(SCRATCH_DIR)/uapi/include 69BPFOBJ := $(BUILD_DIR)/libbpf/libbpf.a 70ifneq ($(CROSS_COMPILE),) 71HOST_BUILD_DIR := $(BUILD_DIR)/host 72HOST_SCRATCH_DIR := $(OUTPUT)/host-tools 73HOST_INCLUDE_DIR := $(HOST_SCRATCH_DIR)/include 74else 75HOST_BUILD_DIR := $(BUILD_DIR) 76HOST_SCRATCH_DIR := $(SCRATCH_DIR) 77HOST_INCLUDE_DIR := $(INCLUDE_DIR) 78endif 79HOST_BPFOBJ := $(HOST_BUILD_DIR)/libbpf/libbpf.a 80RESOLVE_BTFIDS := $(HOST_BUILD_DIR)/resolve_btfids/resolve_btfids 81 82VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux) \ 83 $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux) \ 84 ../../../../vmlinux \ 85 /sys/kernel/btf/vmlinux \ 86 /boot/vmlinux-$(shell uname -r) 87VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS)))) 88ifeq ($(VMLINUX_BTF),) 89$(error Cannot find a vmlinux for VMLINUX_BTF at any of "$(VMLINUX_BTF_PATHS)") 90endif 91 92# Define simple and short `make test_progs`, `make test_sysctl`, etc targets 93# to build individual tests. 94# NOTE: Semicolon at the end is critical to override lib.mk's default static 95# rule for binaries. 96$(notdir $(TEST_GEN_PROGS)): %: $(OUTPUT)/% ; 97 98# sort removes libbpf duplicates when not cross-building 99MAKE_DIRS := $(sort $(BUILD_DIR)/libbpf $(HOST_BUILD_DIR)/libbpf \ 100 $(HOST_BUILD_DIR)/bpftool $(HOST_BUILD_DIR)/resolve_btfids \ 101 $(INCLUDE_DIR)) 102$(MAKE_DIRS): 103 $(call msg,MKDIR,,$@) 104 $(Q)mkdir -p $@ 105 106# LLVM's ld.lld doesn't support all the architectures, so use it only on x86 107ifeq ($(SRCARCH),x86) 108LLD := lld 109else 110LLD := ld 111endif 112 113DEFAULT_BPFTOOL := $(HOST_SCRATCH_DIR)/sbin/bpftool 114 115TEST_GEN_PROGS_EXTENDED += $(DEFAULT_BPFTOOL) 116 117$(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED): $(BPFOBJ) 118 119BPFTOOL ?= $(DEFAULT_BPFTOOL) 120$(DEFAULT_BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile) \ 121 $(HOST_BPFOBJ) | $(HOST_BUILD_DIR)/bpftool 122 $(Q)$(MAKE) $(submake_extras) -C $(BPFTOOLDIR) \ 123 ARCH= CROSS_COMPILE= CC=$(HOSTCC) LD=$(HOSTLD) \ 124 EXTRA_CFLAGS='-g -O0' \ 125 OUTPUT=$(HOST_BUILD_DIR)/bpftool/ \ 126 LIBBPF_OUTPUT=$(HOST_BUILD_DIR)/libbpf/ \ 127 LIBBPF_DESTDIR=$(HOST_SCRATCH_DIR)/ \ 128 prefix= DESTDIR=$(HOST_SCRATCH_DIR)/ install-bin 129 130$(BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile) \ 131 | $(BUILD_DIR)/libbpf 132 $(Q)$(MAKE) $(submake_extras) -C $(BPFDIR) OUTPUT=$(BUILD_DIR)/libbpf/ \ 133 EXTRA_CFLAGS='-g -O0' \ 134 DESTDIR=$(SCRATCH_DIR) prefix= all install_headers 135 136ifneq ($(BPFOBJ),$(HOST_BPFOBJ)) 137$(HOST_BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile) \ 138 | $(HOST_BUILD_DIR)/libbpf 139 $(Q)$(MAKE) $(submake_extras) -C $(BPFDIR) \ 140 EXTRA_CFLAGS='-g -O0' ARCH= CROSS_COMPILE= \ 141 OUTPUT=$(HOST_BUILD_DIR)/libbpf/ CC=$(HOSTCC) LD=$(HOSTLD) \ 142 DESTDIR=$(HOST_SCRATCH_DIR)/ prefix= all install_headers 143endif 144 145$(INCLUDE_DIR)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL) | $(INCLUDE_DIR) 146ifeq ($(VMLINUX_H),) 147 $(call msg,GEN,,$@) 148 $(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF) format c > $@ 149else 150 $(call msg,CP,,$@) 151 $(Q)cp "$(VMLINUX_H)" $@ 152endif 153 154$(KHDR_INCLUDES)/linux/hid.h: $(top_srcdir)/include/uapi/linux/hid.h 155 $(MAKE) -C $(top_srcdir) INSTALL_HDR_PATH=$(SCRATCH_DIR)/uapi headers_install 156 157$(RESOLVE_BTFIDS): $(HOST_BPFOBJ) | $(HOST_BUILD_DIR)/resolve_btfids \ 158 $(TOOLSDIR)/bpf/resolve_btfids/main.c \ 159 $(TOOLSDIR)/lib/rbtree.c \ 160 $(TOOLSDIR)/lib/zalloc.c \ 161 $(TOOLSDIR)/lib/string.c \ 162 $(TOOLSDIR)/lib/ctype.c \ 163 $(TOOLSDIR)/lib/str_error_r.c 164 $(Q)$(MAKE) $(submake_extras) -C $(TOOLSDIR)/bpf/resolve_btfids \ 165 CC=$(HOSTCC) LD=$(HOSTLD) AR=$(HOSTAR) \ 166 LIBBPF_INCLUDE=$(HOST_INCLUDE_DIR) \ 167 OUTPUT=$(HOST_BUILD_DIR)/resolve_btfids/ BPFOBJ=$(HOST_BPFOBJ) 168 169# Get Clang's default includes on this system, as opposed to those seen by 170# '--target=bpf'. This fixes "missing" files on some architectures/distros, 171# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc. 172# 173# Use '-idirafter': Don't interfere with include mechanics except where the 174# build would have failed anyways. 175define get_sys_includes 176$(shell $(1) -v -E - </dev/null 2>&1 \ 177 | sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') \ 178$(shell $(1) -dM -E - </dev/null | grep '__riscv_xlen ' | awk '{printf("-D__riscv_xlen=%d -D__BITS_PER_LONG=%d", $$3, $$3)}') 179endef 180 181# Determine target endianness. 182IS_LITTLE_ENDIAN = $(shell $(CC) -dM -E - </dev/null | \ 183 grep 'define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__') 184MENDIAN=$(if $(IS_LITTLE_ENDIAN),-mlittle-endian,-mbig-endian) 185 186CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG)) 187BPF_CFLAGS = -g -Werror -D__TARGET_ARCH_$(SRCARCH) $(MENDIAN) \ 188 -I$(INCLUDE_DIR) 189 190CLANG_CFLAGS = $(CLANG_SYS_INCLUDES) \ 191 -Wno-compare-distinct-pointer-types 192 193# Build BPF object using Clang 194# $1 - input .c file 195# $2 - output .o file 196# $3 - CFLAGS 197define CLANG_BPF_BUILD_RULE 198 $(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2) 199 $(Q)$(CLANG) $3 -O2 --target=bpf -c $1 -mcpu=v3 -o $2 200endef 201# Similar to CLANG_BPF_BUILD_RULE, but with disabled alu32 202define CLANG_NOALU32_BPF_BUILD_RULE 203 $(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2) 204 $(Q)$(CLANG) $3 -O2 --target=bpf -c $1 -mcpu=v2 -o $2 205endef 206# Build BPF object using GCC 207define GCC_BPF_BUILD_RULE 208 $(call msg,GCC-BPF,$(TRUNNER_BINARY),$2) 209 $(Q)$(BPF_GCC) $3 -O2 -c $1 -o $2 210endef 211 212BPF_PROGS_DIR := progs 213BPF_BUILD_RULE := CLANG_BPF_BUILD_RULE 214BPF_SRCS := $(notdir $(wildcard $(BPF_PROGS_DIR)/*.c)) 215BPF_OBJS := $(patsubst %.c,$(OUTPUT)/%.bpf.o, $(BPF_SRCS)) 216BPF_SKELS := $(patsubst %.c,$(OUTPUT)/%.skel.h, $(BPF_SRCS)) 217TEST_GEN_FILES += $(BPF_OBJS) 218 219$(BPF_PROGS_DIR)-bpfobjs := y 220$(BPF_OBJS): $(OUTPUT)/%.bpf.o: \ 221 $(BPF_PROGS_DIR)/%.c \ 222 $(wildcard $(BPF_PROGS_DIR)/*.h) \ 223 $(INCLUDE_DIR)/vmlinux.h \ 224 $(wildcard $(BPFDIR)/hid_bpf_*.h) \ 225 $(wildcard $(BPFDIR)/*.bpf.h) \ 226 | $(OUTPUT) $(BPFOBJ) 227 $(call $(BPF_BUILD_RULE),$<,$@, $(BPF_CFLAGS)) 228 229$(BPF_SKELS): %.skel.h: %.bpf.o $(BPFTOOL) | $(OUTPUT) 230 $(call msg,GEN-SKEL,$(BINARY),$@) 231 $(Q)$(BPFTOOL) gen object $(<:.o=.linked1.o) $< 232 $(Q)$(BPFTOOL) gen skeleton $(<:.o=.linked1.o) name $(notdir $(<:.bpf.o=)) > $@ 233 234$(OUTPUT)/%.o: %.c $(BPF_SKELS) $(KHDR_INCLUDES)/linux/hid.h 235 $(call msg,CC,,$@) 236 $(Q)$(CC) $(CFLAGS) -c $(filter %.c,$^) $(LDLIBS) -o $@ 237 238$(OUTPUT)/%: $(OUTPUT)/%.o 239 $(call msg,BINARY,,$@) 240 $(Q)$(LINK.c) $^ $(LDLIBS) -o $@ 241 242EXTRA_CLEAN := $(SCRATCH_DIR) $(HOST_SCRATCH_DIR) feature bpftool \ 243 $(addprefix $(OUTPUT)/,*.o *.skel.h no_alu32) 244