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