Merge branch 'for-6.10/hid-bpf' into for-linus

[linux-2.6-block.git] / drivers / hid / bpf / progs / Makefile

diff --git a/drivers/hid/bpf/progs/Makefile b/drivers/hid/bpf/progs/Makefile
new file mode 100644 (file)
index 0000000..63ed7e0
--- /dev/null
+++ b/drivers/hid/bpf/progs/Makefile
@@ -0,0 +1,91 @@
+# SPDX-License-Identifier: GPL-2.0
+OUTPUT := .output
+abs_out := $(abspath $(OUTPUT))
+
+CLANG ?= clang
+LLC ?= llc
+LLVM_STRIP ?= llvm-strip
+
+TOOLS_PATH := $(abspath ../../../../tools)
+BPFTOOL_SRC := $(TOOLS_PATH)/bpf/bpftool
+BPFTOOL_OUTPUT := $(abs_out)/bpftool
+DEFAULT_BPFTOOL := $(BPFTOOL_OUTPUT)/bootstrap/bpftool
+BPFTOOL ?= $(DEFAULT_BPFTOOL)
+
+LIBBPF_SRC := $(TOOLS_PATH)/lib/bpf
+LIBBPF_OUTPUT := $(abs_out)/libbpf
+LIBBPF_DESTDIR := $(LIBBPF_OUTPUT)
+LIBBPF_INCLUDE := $(LIBBPF_DESTDIR)/include
+BPFOBJ := $(LIBBPF_OUTPUT)/libbpf.a
+
+INCLUDES := -I$(OUTPUT) -I$(LIBBPF_INCLUDE) -I$(TOOLS_PATH)/include/uapi
+CFLAGS := -g -Wall
+
+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
+
+ifeq ($(V),1)
+Q =
+msg =
+else
+Q = @
+msg = @printf '  %-8s %s%s\n' "$(1)" "$(notdir $(2))" "$(if $(3), $(3))";
+MAKEFLAGS += --no-print-directory
+submake_extras := feature_display=0
+endif
+
+.DELETE_ON_ERROR:
+
+.PHONY: all clean
+
+SOURCES = $(wildcard *.bpf.c)
+TARGETS = $(SOURCES:.bpf.c=.bpf.o)
+
+all: $(TARGETS)
+
+clean:
+       $(call msg,CLEAN)
+       $(Q)rm -rf $(OUTPUT) $(TARGETS)
+
+%.bpf.o: %.bpf.c vmlinux.h $(BPFOBJ) | $(OUTPUT)
+       $(call msg,BPF,$@)
+       $(Q)$(CLANG) -g -O2 --target=bpf $(INCLUDES)                          \
+                -c $(filter %.c,$^) -o $@ &&                                 \
+       $(LLVM_STRIP) -g $@
+
+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)" $@
+endif
+
+$(OUTPUT) $(LIBBPF_OUTPUT) $(BPFTOOL_OUTPUT):
+       $(call msg,MKDIR,$@)
+       $(Q)mkdir -p $@
+
+$(BPFOBJ): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(LIBBPF_OUTPUT)
+       $(Q)$(MAKE) $(submake_extras) -C $(LIBBPF_SRC)                         \
+                   OUTPUT=$(abspath $(dir $@))/ prefix=                       \
+                   DESTDIR=$(LIBBPF_DESTDIR) $(abspath $@) install_headers
+
+ifeq ($(CROSS_COMPILE),)
+$(DEFAULT_BPFTOOL): $(BPFOBJ) | $(BPFTOOL_OUTPUT)
+       $(Q)$(MAKE) $(submake_extras) -C $(BPFTOOL_SRC)                        \
+                   OUTPUT=$(BPFTOOL_OUTPUT)/                                  \
+                   LIBBPF_BOOTSTRAP_OUTPUT=$(LIBBPF_OUTPUT)/                  \
+                   LIBBPF_BOOTSTRAP_DESTDIR=$(LIBBPF_DESTDIR)/ bootstrap
+else
+$(DEFAULT_BPFTOOL): | $(BPFTOOL_OUTPUT)
+       $(Q)$(MAKE) $(submake_extras) -C $(BPFTOOL_SRC)                        \
+                   OUTPUT=$(BPFTOOL_OUTPUT)/ bootstrap
+endif