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
20TEST_FILES := run-hid-tools-tests.sh
21
22CXX ?= $(CROSS_COMPILE)g++
23
24HOSTPKG_CONFIG := pkg-config
25
26CFLAGS += -g -O0 -rdynamic -Wall -Werror -I$(KHDR_INCLUDES) -I$(OUTPUT)
27LDLIBS += -lelf -lz -lrt -lpthread
28
29# Silence some warnings when compiled with clang
30ifneq ($(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
70KHDR_INCLUDES := $(SCRATCH_DIR)/uapi/include
71BPFOBJ := $(BUILD_DIR)/libbpf/libbpf.a
72ifneq ($(CROSS_COMPILE),)
73HOST_BUILD_DIR		:= $(BUILD_DIR)/host
74HOST_SCRATCH_DIR	:= $(OUTPUT)/host-tools
75HOST_INCLUDE_DIR	:= $(HOST_SCRATCH_DIR)/include
76else
77HOST_BUILD_DIR		:= $(BUILD_DIR)
78HOST_SCRATCH_DIR	:= $(SCRATCH_DIR)
79HOST_INCLUDE_DIR	:= $(INCLUDE_DIR)
80endif
81HOST_BPFOBJ := $(HOST_BUILD_DIR)/libbpf/libbpf.a
82RESOLVE_BTFIDS := $(HOST_BUILD_DIR)/resolve_btfids/resolve_btfids
83
84VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux)				\
85		     $(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux)	\
86		     ../../../../vmlinux				\
87		     /sys/kernel/btf/vmlinux				\
88		     /boot/vmlinux-$(shell uname -r)
89VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
90ifeq ($(VMLINUX_BTF),)
91$(error Cannot find a vmlinux for VMLINUX_BTF at any of "$(VMLINUX_BTF_PATHS)")
92endif
93
94# Define simple and short `make test_progs`, `make test_sysctl`, etc targets
95# to build individual tests.
96# NOTE: Semicolon at the end is critical to override lib.mk's default static
97# rule for binaries.
98$(notdir $(TEST_GEN_PROGS)): %: $(OUTPUT)/% ;
99
100# sort removes libbpf duplicates when not cross-building
101MAKE_DIRS := $(sort $(BUILD_DIR)/libbpf $(HOST_BUILD_DIR)/libbpf		\
102	       $(HOST_BUILD_DIR)/bpftool $(HOST_BUILD_DIR)/resolve_btfids	\
103	       $(INCLUDE_DIR))
104$(MAKE_DIRS):
105	$(call msg,MKDIR,,$@)
106	$(Q)mkdir -p $@
107
108# LLVM's ld.lld doesn't support all the architectures, so use it only on x86
109ifeq ($(SRCARCH),x86)
110LLD := lld
111else
112LLD := ld
113endif
114
115DEFAULT_BPFTOOL := $(HOST_SCRATCH_DIR)/sbin/bpftool
116
117TEST_GEN_PROGS_EXTENDED += $(DEFAULT_BPFTOOL)
118
119$(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED): $(BPFOBJ)
120
121BPFTOOL ?= $(DEFAULT_BPFTOOL)
122$(DEFAULT_BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile)    \
123		    $(HOST_BPFOBJ) | $(HOST_BUILD_DIR)/bpftool
124	$(Q)$(MAKE) $(submake_extras)  -C $(BPFTOOLDIR)			       \
125		    ARCH= CROSS_COMPILE= CC=$(HOSTCC) LD=$(HOSTLD) 	       \
126		    EXTRA_CFLAGS='-g -O0'				       \
127		    OUTPUT=$(HOST_BUILD_DIR)/bpftool/			       \
128		    LIBBPF_OUTPUT=$(HOST_BUILD_DIR)/libbpf/		       \
129		    LIBBPF_DESTDIR=$(HOST_SCRATCH_DIR)/			       \
130		    prefix= DESTDIR=$(HOST_SCRATCH_DIR)/ install-bin
131
132$(BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile)		       \
133	   | $(BUILD_DIR)/libbpf
134	$(Q)$(MAKE) $(submake_extras) -C $(BPFDIR) OUTPUT=$(BUILD_DIR)/libbpf/ \
135		    EXTRA_CFLAGS='-g -O0'				       \
136		    DESTDIR=$(SCRATCH_DIR) prefix= all install_headers
137
138ifneq ($(BPFOBJ),$(HOST_BPFOBJ))
139$(HOST_BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile)		       \
140		| $(HOST_BUILD_DIR)/libbpf
141	$(Q)$(MAKE) $(submake_extras) -C $(BPFDIR)                             \
142		    EXTRA_CFLAGS='-g -O0' ARCH= CROSS_COMPILE=		       \
143		    OUTPUT=$(HOST_BUILD_DIR)/libbpf/ CC=$(HOSTCC) LD=$(HOSTLD) \
144		    DESTDIR=$(HOST_SCRATCH_DIR)/ prefix= all install_headers
145endif
146
147$(INCLUDE_DIR)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL) | $(INCLUDE_DIR)
148ifeq ($(VMLINUX_H),)
149	$(call msg,GEN,,$@)
150	$(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF) format c > $@
151else
152	$(call msg,CP,,$@)
153	$(Q)cp "$(VMLINUX_H)" $@
154endif
155
156$(KHDR_INCLUDES)/linux/hid.h: $(top_srcdir)/include/uapi/linux/hid.h
157	$(MAKE) -C $(top_srcdir) INSTALL_HDR_PATH=$(SCRATCH_DIR)/uapi headers_install
158
159$(RESOLVE_BTFIDS): $(HOST_BPFOBJ) | $(HOST_BUILD_DIR)/resolve_btfids	\
160		       $(TOOLSDIR)/bpf/resolve_btfids/main.c	\
161		       $(TOOLSDIR)/lib/rbtree.c			\
162		       $(TOOLSDIR)/lib/zalloc.c			\
163		       $(TOOLSDIR)/lib/string.c			\
164		       $(TOOLSDIR)/lib/ctype.c			\
165		       $(TOOLSDIR)/lib/str_error_r.c
166	$(Q)$(MAKE) $(submake_extras) -C $(TOOLSDIR)/bpf/resolve_btfids	\
167		CC=$(HOSTCC) LD=$(HOSTLD) AR=$(HOSTAR) \
168		LIBBPF_INCLUDE=$(HOST_INCLUDE_DIR) \
169		OUTPUT=$(HOST_BUILD_DIR)/resolve_btfids/ BPFOBJ=$(HOST_BPFOBJ)
170
171# Get Clang's default includes on this system, as opposed to those seen by
172# '--target=bpf'. This fixes "missing" files on some architectures/distros,
173# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc.
174#
175# Use '-idirafter': Don't interfere with include mechanics except where the
176# build would have failed anyways.
177define get_sys_includes
178$(shell $(1) -v -E - </dev/null 2>&1 \
179	| sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') \
180$(shell $(1) -dM -E - </dev/null | grep '__riscv_xlen ' | awk '{printf("-D__riscv_xlen=%d -D__BITS_PER_LONG=%d", $$3, $$3)}')
181endef
182
183# Determine target endianness.
184IS_LITTLE_ENDIAN = $(shell $(CC) -dM -E - </dev/null | \
185			grep 'define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__')
186MENDIAN=$(if $(IS_LITTLE_ENDIAN),-mlittle-endian,-mbig-endian)
187
188CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG))
189BPF_CFLAGS = -g -Werror -D__TARGET_ARCH_$(SRCARCH) $(MENDIAN) 		\
190	     -I$(INCLUDE_DIR)
191
192CLANG_CFLAGS = $(CLANG_SYS_INCLUDES) \
193	       -Wno-compare-distinct-pointer-types
194
195# Build BPF object using Clang
196# $1 - input .c file
197# $2 - output .o file
198# $3 - CFLAGS
199define CLANG_BPF_BUILD_RULE
200	$(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2)
201	$(Q)$(CLANG) $3 -O2 --target=bpf -c $1 -mcpu=v3 -o $2
202endef
203# Similar to CLANG_BPF_BUILD_RULE, but with disabled alu32
204define CLANG_NOALU32_BPF_BUILD_RULE
205	$(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2)
206	$(Q)$(CLANG) $3 -O2 --target=bpf -c $1 -mcpu=v2 -o $2
207endef
208# Build BPF object using GCC
209define GCC_BPF_BUILD_RULE
210	$(call msg,GCC-BPF,$(TRUNNER_BINARY),$2)
211	$(Q)$(BPF_GCC) $3 -O2 -c $1 -o $2
212endef
213
214BPF_PROGS_DIR := progs
215BPF_BUILD_RULE := CLANG_BPF_BUILD_RULE
216BPF_SRCS := $(notdir $(wildcard $(BPF_PROGS_DIR)/*.c))
217BPF_OBJS := $(patsubst %.c,$(OUTPUT)/%.bpf.o, $(BPF_SRCS))
218BPF_SKELS := $(patsubst %.c,$(OUTPUT)/%.skel.h, $(BPF_SRCS))
219TEST_GEN_FILES += $(BPF_OBJS)
220
221$(BPF_PROGS_DIR)-bpfobjs := y
222$(BPF_OBJS): $(OUTPUT)/%.bpf.o:				\
223	     $(BPF_PROGS_DIR)/%.c			\
224	     $(wildcard $(BPF_PROGS_DIR)/*.h)		\
225	     $(INCLUDE_DIR)/vmlinux.h				\
226	     $(wildcard $(BPFDIR)/hid_bpf_*.h)			\
227	     $(wildcard $(BPFDIR)/*.bpf.h)			\
228	     | $(OUTPUT) $(BPFOBJ)
229	$(call $(BPF_BUILD_RULE),$<,$@, $(BPF_CFLAGS))
230
231$(BPF_SKELS): %.skel.h: %.bpf.o $(BPFTOOL) | $(OUTPUT)
232	$(call msg,GEN-SKEL,$(BINARY),$@)
233	$(Q)$(BPFTOOL) gen object $(<:.o=.linked1.o) $<
234	$(Q)$(BPFTOOL) gen skeleton $(<:.o=.linked1.o) name $(notdir $(<:.bpf.o=)) > $@
235
236$(OUTPUT)/%.o: %.c $(BPF_SKELS) $(KHDR_INCLUDES)/linux/hid.h
237	$(call msg,CC,,$@)
238	$(Q)$(CC) $(CFLAGS) -c $(filter %.c,$^) $(LDLIBS) -o $@
239
240$(OUTPUT)/%: $(OUTPUT)/%.o
241	$(call msg,BINARY,,$@)
242	$(Q)$(LINK.c) $^ $(LDLIBS) -o $@
243
244EXTRA_CLEAN := $(SCRATCH_DIR) $(HOST_SCRATCH_DIR) feature bpftool	\
245	$(addprefix $(OUTPUT)/,*.o *.skel.h no_alu32)
246