xref: /openbmc/linux/samples/bpf/Makefile (revision a5a7daa5)
1# SPDX-License-Identifier: GPL-2.0
2
3BPF_SAMPLES_PATH ?= $(abspath $(srctree)/$(src))
4TOOLS_PATH := $(BPF_SAMPLES_PATH)/../../tools
5
6# List of programs to build
7tprogs-y := test_lru_dist
8tprogs-y += sock_example
9tprogs-y += fds_example
10tprogs-y += sockex1
11tprogs-y += sockex2
12tprogs-y += sockex3
13tprogs-y += tracex1
14tprogs-y += tracex2
15tprogs-y += tracex3
16tprogs-y += tracex4
17tprogs-y += tracex5
18tprogs-y += tracex6
19tprogs-y += tracex7
20tprogs-y += test_probe_write_user
21tprogs-y += trace_output
22tprogs-y += lathist
23tprogs-y += offwaketime
24tprogs-y += spintest
25tprogs-y += map_perf_test
26tprogs-y += test_overhead
27tprogs-y += test_cgrp2_array_pin
28tprogs-y += test_cgrp2_attach
29tprogs-y += test_cgrp2_sock
30tprogs-y += test_cgrp2_sock2
31tprogs-y += xdp1
32tprogs-y += xdp2
33tprogs-y += xdp_router_ipv4
34tprogs-y += test_current_task_under_cgroup
35tprogs-y += trace_event
36tprogs-y += sampleip
37tprogs-y += tc_l2_redirect
38tprogs-y += lwt_len_hist
39tprogs-y += xdp_tx_iptunnel
40tprogs-y += test_map_in_map
41tprogs-y += xdp_redirect_map
42tprogs-y += xdp_redirect_cpu
43tprogs-y += xdp_monitor
44tprogs-y += xdp_rxq_info
45tprogs-y += syscall_tp
46tprogs-y += cpustat
47tprogs-y += xdp_adjust_tail
48tprogs-y += xdpsock
49tprogs-y += xdp_fwd
50tprogs-y += task_fd_query
51tprogs-y += xdp_sample_pkts
52tprogs-y += ibumad
53tprogs-y += hbm
54
55# Libbpf dependencies
56LIBBPF = $(TOOLS_PATH)/lib/bpf/libbpf.a
57
58CGROUP_HELPERS := ../../tools/testing/selftests/bpf/cgroup_helpers.o
59TRACE_HELPERS := ../../tools/testing/selftests/bpf/trace_helpers.o
60
61fds_example-objs := fds_example.o
62sockex1-objs := sockex1_user.o
63sockex2-objs := sockex2_user.o
64sockex3-objs := bpf_load.o sockex3_user.o
65tracex1-objs := bpf_load.o tracex1_user.o
66tracex2-objs := bpf_load.o tracex2_user.o
67tracex3-objs := bpf_load.o tracex3_user.o
68tracex4-objs := bpf_load.o tracex4_user.o
69tracex5-objs := bpf_load.o tracex5_user.o
70tracex6-objs := bpf_load.o tracex6_user.o
71tracex7-objs := bpf_load.o tracex7_user.o
72test_probe_write_user-objs := bpf_load.o test_probe_write_user_user.o
73trace_output-objs := bpf_load.o trace_output_user.o $(TRACE_HELPERS)
74lathist-objs := bpf_load.o lathist_user.o
75offwaketime-objs := bpf_load.o offwaketime_user.o $(TRACE_HELPERS)
76spintest-objs := bpf_load.o spintest_user.o $(TRACE_HELPERS)
77map_perf_test-objs := bpf_load.o map_perf_test_user.o
78test_overhead-objs := bpf_load.o test_overhead_user.o
79test_cgrp2_array_pin-objs := test_cgrp2_array_pin.o
80test_cgrp2_attach-objs := test_cgrp2_attach.o
81test_cgrp2_sock-objs := test_cgrp2_sock.o
82test_cgrp2_sock2-objs := bpf_load.o test_cgrp2_sock2.o
83xdp1-objs := xdp1_user.o
84# reuse xdp1 source intentionally
85xdp2-objs := xdp1_user.o
86xdp_router_ipv4-objs := xdp_router_ipv4_user.o
87test_current_task_under_cgroup-objs := bpf_load.o $(CGROUP_HELPERS) \
88				       test_current_task_under_cgroup_user.o
89trace_event-objs := bpf_load.o trace_event_user.o $(TRACE_HELPERS)
90sampleip-objs := bpf_load.o sampleip_user.o $(TRACE_HELPERS)
91tc_l2_redirect-objs := bpf_load.o tc_l2_redirect_user.o
92lwt_len_hist-objs := bpf_load.o lwt_len_hist_user.o
93xdp_tx_iptunnel-objs := xdp_tx_iptunnel_user.o
94test_map_in_map-objs := bpf_load.o test_map_in_map_user.o
95per_socket_stats_example-objs := cookie_uid_helper_example.o
96xdp_redirect-objs := xdp_redirect_user.o
97xdp_redirect_map-objs := xdp_redirect_map_user.o
98xdp_redirect_cpu-objs := bpf_load.o xdp_redirect_cpu_user.o
99xdp_monitor-objs := bpf_load.o xdp_monitor_user.o
100xdp_rxq_info-objs := xdp_rxq_info_user.o
101syscall_tp-objs := bpf_load.o syscall_tp_user.o
102cpustat-objs := bpf_load.o cpustat_user.o
103xdp_adjust_tail-objs := xdp_adjust_tail_user.o
104xdpsock-objs := xdpsock_user.o
105xdp_fwd-objs := xdp_fwd_user.o
106task_fd_query-objs := bpf_load.o task_fd_query_user.o $(TRACE_HELPERS)
107xdp_sample_pkts-objs := xdp_sample_pkts_user.o $(TRACE_HELPERS)
108ibumad-objs := bpf_load.o ibumad_user.o $(TRACE_HELPERS)
109hbm-objs := bpf_load.o hbm.o $(CGROUP_HELPERS)
110
111# Tell kbuild to always build the programs
112always := $(tprogs-y)
113always += sockex1_kern.o
114always += sockex2_kern.o
115always += sockex3_kern.o
116always += tracex1_kern.o
117always += tracex2_kern.o
118always += tracex3_kern.o
119always += tracex4_kern.o
120always += tracex5_kern.o
121always += tracex6_kern.o
122always += tracex7_kern.o
123always += sock_flags_kern.o
124always += test_probe_write_user_kern.o
125always += trace_output_kern.o
126always += tcbpf1_kern.o
127always += tc_l2_redirect_kern.o
128always += lathist_kern.o
129always += offwaketime_kern.o
130always += spintest_kern.o
131always += map_perf_test_kern.o
132always += test_overhead_tp_kern.o
133always += test_overhead_raw_tp_kern.o
134always += test_overhead_kprobe_kern.o
135always += parse_varlen.o parse_simple.o parse_ldabs.o
136always += test_cgrp2_tc_kern.o
137always += xdp1_kern.o
138always += xdp2_kern.o
139always += xdp_router_ipv4_kern.o
140always += test_current_task_under_cgroup_kern.o
141always += trace_event_kern.o
142always += sampleip_kern.o
143always += lwt_len_hist_kern.o
144always += xdp_tx_iptunnel_kern.o
145always += test_map_in_map_kern.o
146always += tcp_synrto_kern.o
147always += tcp_rwnd_kern.o
148always += tcp_bufs_kern.o
149always += tcp_cong_kern.o
150always += tcp_iw_kern.o
151always += tcp_clamp_kern.o
152always += tcp_basertt_kern.o
153always += tcp_tos_reflect_kern.o
154always += tcp_dumpstats_kern.o
155always += xdp_redirect_kern.o
156always += xdp_redirect_map_kern.o
157always += xdp_redirect_cpu_kern.o
158always += xdp_monitor_kern.o
159always += xdp_rxq_info_kern.o
160always += xdp2skb_meta_kern.o
161always += syscall_tp_kern.o
162always += cpustat_kern.o
163always += xdp_adjust_tail_kern.o
164always += xdp_fwd_kern.o
165always += task_fd_query_kern.o
166always += xdp_sample_pkts_kern.o
167always += ibumad_kern.o
168always += hbm_out_kern.o
169always += hbm_edt_kern.o
170
171ifeq ($(ARCH), arm)
172# Strip all except -D__LINUX_ARM_ARCH__ option needed to handle linux
173# headers when arm instruction set identification is requested.
174ARM_ARCH_SELECTOR := $(filter -D__LINUX_ARM_ARCH__%, $(KBUILD_CFLAGS))
175BPF_EXTRA_CFLAGS := $(ARM_ARCH_SELECTOR)
176TPROGS_CFLAGS += $(ARM_ARCH_SELECTOR)
177endif
178
179TPROGS_CFLAGS += -Wall -O2
180TPROGS_CFLAGS += -Wmissing-prototypes
181TPROGS_CFLAGS += -Wstrict-prototypes
182
183TPROGS_CFLAGS += -I$(objtree)/usr/include
184TPROGS_CFLAGS += -I$(srctree)/tools/lib/bpf/
185TPROGS_CFLAGS += -I$(srctree)/tools/testing/selftests/bpf/
186TPROGS_CFLAGS += -I$(srctree)/tools/lib/
187TPROGS_CFLAGS += -I$(srctree)/tools/include
188TPROGS_CFLAGS += -I$(srctree)/tools/perf
189
190ifdef SYSROOT
191TPROGS_CFLAGS += --sysroot=$(SYSROOT)
192TPROGS_LDFLAGS := -L$(SYSROOT)/usr/lib
193endif
194
195TPROGCFLAGS_bpf_load.o += -Wno-unused-variable
196
197TPROGS_LDLIBS			+= $(LIBBPF) -lelf
198TPROGLDLIBS_tracex4		+= -lrt
199TPROGLDLIBS_trace_output	+= -lrt
200TPROGLDLIBS_map_perf_test	+= -lrt
201TPROGLDLIBS_test_overhead	+= -lrt
202TPROGLDLIBS_xdpsock		+= -pthread
203
204# Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline:
205#  make samples/bpf/ LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang
206LLC ?= llc
207CLANG ?= clang
208LLVM_OBJCOPY ?= llvm-objcopy
209BTF_PAHOLE ?= pahole
210
211# Detect that we're cross compiling and use the cross compiler
212ifdef CROSS_COMPILE
213CLANG_ARCH_ARGS = --target=$(notdir $(CROSS_COMPILE:%-=%))
214endif
215
216# Don't evaluate probes and warnings if we need to run make recursively
217ifneq ($(src),)
218HDR_PROBE := $(shell printf "\#include <linux/types.h>\n struct list_head { int a; }; int main() { return 0; }" | \
219	$(CC) $(TPROGS_CFLAGS) $(TPROGS_LDFLAGS) -x c - \
220	-o /dev/null 2>/dev/null && echo okay)
221
222ifeq ($(HDR_PROBE),)
223$(warning WARNING: Detected possible issues with include path.)
224$(warning WARNING: Please install kernel headers locally (make headers_install).)
225endif
226
227BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help 2>&1 | grep dwarfris)
228BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF)
229BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm')
230BTF_LLVM_PROBE := $(shell echo "int main() { return 0; }" | \
231			  $(CLANG) -target bpf -O2 -g -c -x c - -o ./llvm_btf_verify.o; \
232			  readelf -S ./llvm_btf_verify.o | grep BTF; \
233			  /bin/rm -f ./llvm_btf_verify.o)
234
235ifneq ($(BTF_LLVM_PROBE),)
236	BPF_EXTRA_CFLAGS += -g
237else
238ifneq ($(and $(BTF_LLC_PROBE),$(BTF_PAHOLE_PROBE),$(BTF_OBJCOPY_PROBE)),)
239	BPF_EXTRA_CFLAGS += -g
240	LLC_FLAGS += -mattr=dwarfris
241	DWARF2BTF = y
242endif
243endif
244endif
245
246# Trick to allow make to be run from this directory
247all:
248	$(MAKE) -C ../../ $(CURDIR)/ BPF_SAMPLES_PATH=$(CURDIR)
249
250clean:
251	$(MAKE) -C ../../ M=$(CURDIR) clean
252	@rm -f *~
253
254$(LIBBPF): FORCE
255# Fix up variables inherited from Kbuild that tools/ build system won't like
256	$(MAKE) -C $(dir $@) RM='rm -rf' EXTRA_CFLAGS="$(TPROGS_CFLAGS)" \
257		LDFLAGS=$(TPROGS_LDFLAGS) srctree=$(BPF_SAMPLES_PATH)/../../ O=
258
259$(obj)/syscall_nrs.h:	$(obj)/syscall_nrs.s FORCE
260	$(call filechk,offsets,__SYSCALL_NRS_H__)
261
262targets += syscall_nrs.s
263clean-files += syscall_nrs.h
264
265FORCE:
266
267
268# Verify LLVM compiler tools are available and bpf target is supported by llc
269.PHONY: verify_cmds verify_target_bpf $(CLANG) $(LLC)
270
271verify_cmds: $(CLANG) $(LLC)
272	@for TOOL in $^ ; do \
273		if ! (which -- "$${TOOL}" > /dev/null 2>&1); then \
274			echo "*** ERROR: Cannot find LLVM tool $${TOOL}" ;\
275			exit 1; \
276		else true; fi; \
277	done
278
279verify_target_bpf: verify_cmds
280	@if ! (${LLC} -march=bpf -mattr=help > /dev/null 2>&1); then \
281		echo "*** ERROR: LLVM (${LLC}) does not support 'bpf' target" ;\
282		echo "   NOTICE: LLVM version >= 3.7.1 required" ;\
283		exit 2; \
284	else true; fi
285
286$(BPF_SAMPLES_PATH)/*.c: verify_target_bpf $(LIBBPF)
287$(src)/*.c: verify_target_bpf $(LIBBPF)
288
289$(obj)/tracex5_kern.o: $(obj)/syscall_nrs.h
290$(obj)/hbm_out_kern.o: $(src)/hbm.h $(src)/hbm_kern.h
291$(obj)/hbm.o: $(src)/hbm.h
292$(obj)/hbm_edt_kern.o: $(src)/hbm.h $(src)/hbm_kern.h
293
294-include $(BPF_SAMPLES_PATH)/Makefile.target
295
296# asm/sysreg.h - inline assembly used by it is incompatible with llvm.
297# But, there is no easy way to fix it, so just exclude it since it is
298# useless for BPF samples.
299$(obj)/%.o: $(src)/%.c
300	@echo "  CLANG-bpf " $@
301	$(Q)$(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(BPF_EXTRA_CFLAGS) \
302		-I$(obj) -I$(srctree)/tools/testing/selftests/bpf/ \
303		-I$(srctree)/tools/lib/bpf/ \
304		-D__KERNEL__ -D__BPF_TRACING__ -Wno-unused-value -Wno-pointer-sign \
305		-D__TARGET_ARCH_$(SRCARCH) -Wno-compare-distinct-pointer-types \
306		-Wno-gnu-variable-sized-type-not-at-end \
307		-Wno-address-of-packed-member -Wno-tautological-compare \
308		-Wno-unknown-warning-option $(CLANG_ARCH_ARGS) \
309		-I$(srctree)/samples/bpf/ -include asm_goto_workaround.h \
310		-O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf $(LLC_FLAGS) -filetype=obj -o $@
311ifeq ($(DWARF2BTF),y)
312	$(BTF_PAHOLE) -J $@
313endif
314