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linux/tools/testing/selftests/hid/Makefile
Benjamin Tissoires 8163892a62 selftests/hid: Add initial hidraw tests skeleton 
Largely inspired from hid_bpf.c for the fixture setup.

Create a couple of tests for hidraw:
- create a uhid device and check if the fixture is working properly
- inject one uhid event and read it through hidraw

These tests are not that useful for now, but will be once we start adding
the ioctl and BPFs to revoke the hidraw node.

Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Link: https://patch.msgid.link/20240827-hidraw-revoke-v5-3-d004a7451aea@kernel.org
Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
2024-08-29 10:39:37 +02:00

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Makefile
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# SPDX-License-Identifier: GPL-2.0
# based on tools/testing/selftest/bpf/Makefile
include ../../../build/Build.include
include ../../../scripts/Makefile.arch
include ../../../scripts/Makefile.include
TEST_PROGS := hid-core.sh
TEST_PROGS += hid-apple.sh
TEST_PROGS += hid-gamepad.sh
TEST_PROGS += hid-ite.sh
TEST_PROGS += hid-keyboard.sh
TEST_PROGS += hid-mouse.sh
TEST_PROGS += hid-multitouch.sh
TEST_PROGS += hid-sony.sh
TEST_PROGS += hid-tablet.sh
TEST_PROGS += hid-usb_crash.sh
TEST_PROGS += hid-wacom.sh
CXX ?= $(CROSS_COMPILE)g++
HOSTPKG_CONFIG := pkg-config
CFLAGS += -g -O0 -rdynamic -Wall -Werror -I$(OUTPUT)
CFLAGS += -I$(OUTPUT)/tools/include
LDLIBS += -lelf -lz -lrt -lpthread
# Silence some warnings when compiled with clang
ifneq ($(LLVM),)
CFLAGS += -Wno-unused-command-line-argument
endif
# Order correspond to 'make run_tests' order
TEST_GEN_PROGS = hid_bpf hidraw
# Emit succinct information message describing current building step
# $1 - generic step name (e.g., CC, LINK, etc);
# $2 - optional "flavor" specifier; if provided, will be emitted as [flavor];
# $3 - target (assumed to be file); only file name will be emitted;
# $4 - optional extra arg, emitted as-is, if provided.
ifeq ($(V),1)
Q =
msg =
else
Q = @
msg = @printf ' %-8s%s %s%s\n' "$(1)" "$(if $(2), [$(2)])" "$(notdir $(3))" "$(if $(4), $(4))";
MAKEFLAGS += --no-print-directory
submake_extras := feature_display=0
endif
# override lib.mk's default rules
OVERRIDE_TARGETS := 1
override define CLEAN
$(call msg,CLEAN)
$(Q)$(RM) -r $(TEST_GEN_PROGS)
$(Q)$(RM) -r $(EXTRA_CLEAN)
endef
include ../lib.mk
TOOLSDIR := $(top_srcdir)/tools
LIBDIR := $(TOOLSDIR)/lib
BPFDIR := $(LIBDIR)/bpf
TOOLSINCDIR := $(TOOLSDIR)/include
BPFTOOLDIR := $(TOOLSDIR)/bpf/bpftool
SCRATCH_DIR := $(OUTPUT)/tools
BUILD_DIR := $(SCRATCH_DIR)/build
INCLUDE_DIR := $(SCRATCH_DIR)/include
BPFOBJ := $(BUILD_DIR)/libbpf/libbpf.a
ifneq ($(CROSS_COMPILE),)
HOST_BUILD_DIR := $(BUILD_DIR)/host
HOST_SCRATCH_DIR := $(OUTPUT)/host-tools
HOST_INCLUDE_DIR := $(HOST_SCRATCH_DIR)/include
else
HOST_BUILD_DIR := $(BUILD_DIR)
HOST_SCRATCH_DIR := $(SCRATCH_DIR)
HOST_INCLUDE_DIR := $(INCLUDE_DIR)
endif
HOST_BPFOBJ := $(HOST_BUILD_DIR)/libbpf/libbpf.a
RESOLVE_BTFIDS := $(HOST_BUILD_DIR)/resolve_btfids/resolve_btfids
VMLINUX_BTF_PATHS ?= $(if $(O),$(O)/vmlinux) \
$(if $(KBUILD_OUTPUT),$(KBUILD_OUTPUT)/vmlinux) \
../../../../vmlinux \
/sys/kernel/btf/vmlinux \
/boot/vmlinux-$(shell uname -r)
VMLINUX_BTF ?= $(abspath $(firstword $(wildcard $(VMLINUX_BTF_PATHS))))
ifeq ($(VMLINUX_BTF),)
$(error Cannot find a vmlinux for VMLINUX_BTF at any of "$(VMLINUX_BTF_PATHS)")
endif
# Define simple and short `make test_progs`, `make test_sysctl`, etc targets
# to build individual tests.
# NOTE: Semicolon at the end is critical to override lib.mk's default static
# rule for binaries.
$(notdir $(TEST_GEN_PROGS)): %: $(OUTPUT)/% ;
# sort removes libbpf duplicates when not cross-building
MAKE_DIRS := $(sort $(BUILD_DIR)/libbpf $(HOST_BUILD_DIR)/libbpf \
$(HOST_BUILD_DIR)/bpftool $(HOST_BUILD_DIR)/resolve_btfids \
$(INCLUDE_DIR))
$(MAKE_DIRS):
$(call msg,MKDIR,,$@)
$(Q)mkdir -p $@
# LLVM's ld.lld doesn't support all the architectures, so use it only on x86
ifeq ($(SRCARCH),x86)
LLD := lld
else
LLD := ld
endif
DEFAULT_BPFTOOL := $(HOST_SCRATCH_DIR)/sbin/bpftool
TEST_GEN_PROGS_EXTENDED += $(DEFAULT_BPFTOOL)
$(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED): $(BPFOBJ)
BPFTOOL ?= $(DEFAULT_BPFTOOL)
$(DEFAULT_BPFTOOL): $(wildcard $(BPFTOOLDIR)/*.[ch] $(BPFTOOLDIR)/Makefile) \
$(HOST_BPFOBJ) | $(HOST_BUILD_DIR)/bpftool
$(Q)$(MAKE) $(submake_extras) -C $(BPFTOOLDIR) \
ARCH= CROSS_COMPILE= CC=$(HOSTCC) LD=$(HOSTLD) \
EXTRA_CFLAGS='-g -O0' \
OUTPUT=$(HOST_BUILD_DIR)/bpftool/ \
LIBBPF_OUTPUT=$(HOST_BUILD_DIR)/libbpf/ \
LIBBPF_DESTDIR=$(HOST_SCRATCH_DIR)/ \
prefix= DESTDIR=$(HOST_SCRATCH_DIR)/ install-bin
$(BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile) \
| $(BUILD_DIR)/libbpf
$(Q)$(MAKE) $(submake_extras) -C $(BPFDIR) OUTPUT=$(BUILD_DIR)/libbpf/ \
EXTRA_CFLAGS='-g -O0' \
DESTDIR=$(SCRATCH_DIR) prefix= all install_headers
ifneq ($(BPFOBJ),$(HOST_BPFOBJ))
$(HOST_BPFOBJ): $(wildcard $(BPFDIR)/*.[ch] $(BPFDIR)/Makefile) \
| $(HOST_BUILD_DIR)/libbpf
$(Q)$(MAKE) $(submake_extras) -C $(BPFDIR) \
EXTRA_CFLAGS='-g -O0' ARCH= CROSS_COMPILE= \
OUTPUT=$(HOST_BUILD_DIR)/libbpf/ CC=$(HOSTCC) LD=$(HOSTLD) \
DESTDIR=$(HOST_SCRATCH_DIR)/ prefix= all install_headers
endif
$(INCLUDE_DIR)/vmlinux.h: $(VMLINUX_BTF) $(BPFTOOL) | $(INCLUDE_DIR)
ifeq ($(VMLINUX_H),)
$(call msg,GEN,,$@)
$(Q)$(BPFTOOL) btf dump file $(VMLINUX_BTF) format c > $@
else
$(call msg,CP,,$@)
$(Q)cp "$(VMLINUX_H)" $@
endif
$(RESOLVE_BTFIDS): $(HOST_BPFOBJ) | $(HOST_BUILD_DIR)/resolve_btfids \
$(TOOLSDIR)/bpf/resolve_btfids/main.c \
$(TOOLSDIR)/lib/rbtree.c \
$(TOOLSDIR)/lib/zalloc.c \
$(TOOLSDIR)/lib/string.c \
$(TOOLSDIR)/lib/ctype.c \
$(TOOLSDIR)/lib/str_error_r.c
$(Q)$(MAKE) $(submake_extras) -C $(TOOLSDIR)/bpf/resolve_btfids \
CC=$(HOSTCC) LD=$(HOSTLD) AR=$(HOSTAR) \
LIBBPF_INCLUDE=$(HOST_INCLUDE_DIR) \
OUTPUT=$(HOST_BUILD_DIR)/resolve_btfids/ BPFOBJ=$(HOST_BPFOBJ)
# Get Clang's default includes on this system, as opposed to those seen by
# '--target=bpf'. This fixes "missing" files on some architectures/distros,
# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc.
#
# Use '-idirafter': Don't interfere with include mechanics except where the
# build would have failed anyways.
define get_sys_includes
$(shell $(1) -v -E - </dev/null 2>&1 \
| sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }') \
$(shell $(1) -dM -E - </dev/null | grep '__riscv_xlen ' | awk '{printf("-D__riscv_xlen=%d -D__BITS_PER_LONG=%d", $$3, $$3)}')
endef
# Determine target endianness.
IS_LITTLE_ENDIAN = $(shell $(CC) -dM -E - </dev/null | \
grep 'define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__')
MENDIAN=$(if $(IS_LITTLE_ENDIAN),-mlittle-endian,-mbig-endian)
CLANG_SYS_INCLUDES = $(call get_sys_includes,$(CLANG))
BPF_CFLAGS = -g -Werror -D__TARGET_ARCH_$(SRCARCH) $(MENDIAN) \
-I$(INCLUDE_DIR)
CLANG_CFLAGS = $(CLANG_SYS_INCLUDES) \
-Wno-compare-distinct-pointer-types
# Build BPF object using Clang
# $1 - input .c file
# $2 - output .o file
# $3 - CFLAGS
define CLANG_BPF_BUILD_RULE
$(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2)
$(Q)$(CLANG) $3 -O2 --target=bpf -c $1 -mcpu=v3 -o $2
endef
# Similar to CLANG_BPF_BUILD_RULE, but with disabled alu32
define CLANG_NOALU32_BPF_BUILD_RULE
$(call msg,CLNG-BPF,$(TRUNNER_BINARY),$2)
$(Q)$(CLANG) $3 -O2 --target=bpf -c $1 -mcpu=v2 -o $2
endef
# Build BPF object using GCC
define GCC_BPF_BUILD_RULE
$(call msg,GCC-BPF,$(TRUNNER_BINARY),$2)
$(Q)$(BPF_GCC) $3 -O2 -c $1 -o $2
endef
BPF_PROGS_DIR := progs
BPF_BUILD_RULE := CLANG_BPF_BUILD_RULE
BPF_SRCS := $(notdir $(wildcard $(BPF_PROGS_DIR)/*.c))
BPF_OBJS := $(patsubst %.c,$(OUTPUT)/%.bpf.o, $(BPF_SRCS))
BPF_SKELS := $(patsubst %.c,$(OUTPUT)/%.skel.h, $(BPF_SRCS))
TEST_GEN_FILES += $(BPF_OBJS)
$(BPF_PROGS_DIR)-bpfobjs := y
$(BPF_OBJS): $(OUTPUT)/%.bpf.o: \
$(BPF_PROGS_DIR)/%.c \
$(wildcard $(BPF_PROGS_DIR)/*.h) \
$(INCLUDE_DIR)/vmlinux.h \
$(wildcard $(BPFDIR)/hid_bpf_*.h) \
$(wildcard $(BPFDIR)/*.bpf.h) \
| $(OUTPUT) $(BPFOBJ)
$(call $(BPF_BUILD_RULE),$<,$@, $(BPF_CFLAGS))
$(BPF_SKELS): %.skel.h: %.bpf.o $(BPFTOOL) | $(OUTPUT)
$(call msg,GEN-SKEL,$(BINARY),$@)
$(Q)$(BPFTOOL) gen object $(<:.o=.linked1.o) $<
$(Q)$(BPFTOOL) gen skeleton $(<:.o=.linked1.o) name $(notdir $(<:.bpf.o=)) > $@
$(OUTPUT)/%.o: %.c $(BPF_SKELS)
$(call msg,CC,,$@)
$(Q)$(CC) $(CFLAGS) -c $(filter %.c,$^) $(LDLIBS) -o $@
$(OUTPUT)/%: $(OUTPUT)/%.o
$(call msg,BINARY,,$@)
$(Q)$(LINK.c) $^ $(LDLIBS) -o $@
EXTRA_CLEAN := $(SCRATCH_DIR) $(HOST_SCRATCH_DIR) feature bpftool \
$(addprefix $(OUTPUT)/,*.o *.skel.h no_alu32)
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