xref: /openbmc/linux/samples/bpf/Makefile (revision 023e4163)
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
7hostprogs-y := test_lru_dist
8hostprogs-y += sock_example
9hostprogs-y += fds_example
10hostprogs-y += sockex1
11hostprogs-y += sockex2
12hostprogs-y += sockex3
13hostprogs-y += tracex1
14hostprogs-y += tracex2
15hostprogs-y += tracex3
16hostprogs-y += tracex4
17hostprogs-y += tracex5
18hostprogs-y += tracex6
19hostprogs-y += tracex7
20hostprogs-y += test_probe_write_user
21hostprogs-y += trace_output
22hostprogs-y += lathist
23hostprogs-y += offwaketime
24hostprogs-y += spintest
25hostprogs-y += map_perf_test
26hostprogs-y += test_overhead
27hostprogs-y += test_cgrp2_array_pin
28hostprogs-y += test_cgrp2_attach
29hostprogs-y += test_cgrp2_attach2
30hostprogs-y += test_cgrp2_sock
31hostprogs-y += test_cgrp2_sock2
32hostprogs-y += xdp1
33hostprogs-y += xdp2
34hostprogs-y += xdp_router_ipv4
35hostprogs-y += test_current_task_under_cgroup
36hostprogs-y += trace_event
37hostprogs-y += sampleip
38hostprogs-y += tc_l2_redirect
39hostprogs-y += lwt_len_hist
40hostprogs-y += xdp_tx_iptunnel
41hostprogs-y += test_map_in_map
42hostprogs-y += per_socket_stats_example
43hostprogs-y += xdp_redirect
44hostprogs-y += xdp_redirect_map
45hostprogs-y += xdp_redirect_cpu
46hostprogs-y += xdp_monitor
47hostprogs-y += xdp_rxq_info
48hostprogs-y += syscall_tp
49hostprogs-y += cpustat
50hostprogs-y += xdp_adjust_tail
51hostprogs-y += xdpsock
52hostprogs-y += xdp_fwd
53hostprogs-y += task_fd_query
54hostprogs-y += xdp_sample_pkts
55hostprogs-y += hbm
56
57# Libbpf dependencies
58LIBBPF = $(TOOLS_PATH)/lib/bpf/libbpf.a
59
60CGROUP_HELPERS := ../../tools/testing/selftests/bpf/cgroup_helpers.o
61TRACE_HELPERS := ../../tools/testing/selftests/bpf/trace_helpers.o
62
63fds_example-objs := fds_example.o
64sockex1-objs := sockex1_user.o
65sockex2-objs := sockex2_user.o
66sockex3-objs := bpf_load.o sockex3_user.o
67tracex1-objs := bpf_load.o tracex1_user.o
68tracex2-objs := bpf_load.o tracex2_user.o
69tracex3-objs := bpf_load.o tracex3_user.o
70tracex4-objs := bpf_load.o tracex4_user.o
71tracex5-objs := bpf_load.o tracex5_user.o
72tracex6-objs := bpf_load.o tracex6_user.o
73tracex7-objs := bpf_load.o tracex7_user.o
74test_probe_write_user-objs := bpf_load.o test_probe_write_user_user.o
75trace_output-objs := bpf_load.o trace_output_user.o $(TRACE_HELPERS)
76lathist-objs := bpf_load.o lathist_user.o
77offwaketime-objs := bpf_load.o offwaketime_user.o $(TRACE_HELPERS)
78spintest-objs := bpf_load.o spintest_user.o $(TRACE_HELPERS)
79map_perf_test-objs := bpf_load.o map_perf_test_user.o
80test_overhead-objs := bpf_load.o test_overhead_user.o
81test_cgrp2_array_pin-objs := test_cgrp2_array_pin.o
82test_cgrp2_attach-objs := test_cgrp2_attach.o
83test_cgrp2_attach2-objs := test_cgrp2_attach2.o $(CGROUP_HELPERS)
84test_cgrp2_sock-objs := test_cgrp2_sock.o
85test_cgrp2_sock2-objs := bpf_load.o test_cgrp2_sock2.o
86xdp1-objs := xdp1_user.o
87# reuse xdp1 source intentionally
88xdp2-objs := xdp1_user.o
89xdp_router_ipv4-objs := xdp_router_ipv4_user.o
90test_current_task_under_cgroup-objs := bpf_load.o $(CGROUP_HELPERS) \
91				       test_current_task_under_cgroup_user.o
92trace_event-objs := bpf_load.o trace_event_user.o $(TRACE_HELPERS)
93sampleip-objs := bpf_load.o sampleip_user.o $(TRACE_HELPERS)
94tc_l2_redirect-objs := bpf_load.o tc_l2_redirect_user.o
95lwt_len_hist-objs := bpf_load.o lwt_len_hist_user.o
96xdp_tx_iptunnel-objs := xdp_tx_iptunnel_user.o
97test_map_in_map-objs := bpf_load.o test_map_in_map_user.o
98per_socket_stats_example-objs := cookie_uid_helper_example.o
99xdp_redirect-objs := xdp_redirect_user.o
100xdp_redirect_map-objs := xdp_redirect_map_user.o
101xdp_redirect_cpu-objs := bpf_load.o xdp_redirect_cpu_user.o
102xdp_monitor-objs := bpf_load.o xdp_monitor_user.o
103xdp_rxq_info-objs := xdp_rxq_info_user.o
104syscall_tp-objs := bpf_load.o syscall_tp_user.o
105cpustat-objs := bpf_load.o cpustat_user.o
106xdp_adjust_tail-objs := xdp_adjust_tail_user.o
107xdpsock-objs := xdpsock_user.o
108xdp_fwd-objs := xdp_fwd_user.o
109task_fd_query-objs := bpf_load.o task_fd_query_user.o $(TRACE_HELPERS)
110xdp_sample_pkts-objs := xdp_sample_pkts_user.o $(TRACE_HELPERS)
111hbm-objs := bpf_load.o hbm.o $(CGROUP_HELPERS)
112
113# Tell kbuild to always build the programs
114always := $(hostprogs-y)
115always += sockex1_kern.o
116always += sockex2_kern.o
117always += sockex3_kern.o
118always += tracex1_kern.o
119always += tracex2_kern.o
120always += tracex3_kern.o
121always += tracex4_kern.o
122always += tracex5_kern.o
123always += tracex6_kern.o
124always += tracex7_kern.o
125always += sock_flags_kern.o
126always += test_probe_write_user_kern.o
127always += trace_output_kern.o
128always += tcbpf1_kern.o
129always += tc_l2_redirect_kern.o
130always += lathist_kern.o
131always += offwaketime_kern.o
132always += spintest_kern.o
133always += map_perf_test_kern.o
134always += test_overhead_tp_kern.o
135always += test_overhead_raw_tp_kern.o
136always += test_overhead_kprobe_kern.o
137always += parse_varlen.o parse_simple.o parse_ldabs.o
138always += test_cgrp2_tc_kern.o
139always += xdp1_kern.o
140always += xdp2_kern.o
141always += xdp_router_ipv4_kern.o
142always += test_current_task_under_cgroup_kern.o
143always += trace_event_kern.o
144always += sampleip_kern.o
145always += lwt_len_hist_kern.o
146always += xdp_tx_iptunnel_kern.o
147always += test_map_in_map_kern.o
148always += cookie_uid_helper_example.o
149always += tcp_synrto_kern.o
150always += tcp_rwnd_kern.o
151always += tcp_bufs_kern.o
152always += tcp_cong_kern.o
153always += tcp_iw_kern.o
154always += tcp_clamp_kern.o
155always += tcp_basertt_kern.o
156always += tcp_tos_reflect_kern.o
157always += xdp_redirect_kern.o
158always += xdp_redirect_map_kern.o
159always += xdp_redirect_cpu_kern.o
160always += xdp_monitor_kern.o
161always += xdp_rxq_info_kern.o
162always += xdp2skb_meta_kern.o
163always += syscall_tp_kern.o
164always += cpustat_kern.o
165always += xdp_adjust_tail_kern.o
166always += xdp_fwd_kern.o
167always += task_fd_query_kern.o
168always += xdp_sample_pkts_kern.o
169always += hbm_out_kern.o
170
171KBUILD_HOSTCFLAGS += -I$(objtree)/usr/include
172KBUILD_HOSTCFLAGS += -I$(srctree)/tools/lib/
173KBUILD_HOSTCFLAGS += -I$(srctree)/tools/testing/selftests/bpf/
174KBUILD_HOSTCFLAGS += -I$(srctree)/tools/lib/ -I$(srctree)/tools/include
175KBUILD_HOSTCFLAGS += -I$(srctree)/tools/perf
176
177HOSTCFLAGS_bpf_load.o += -I$(objtree)/usr/include -Wno-unused-variable
178HOSTCFLAGS_trace_helpers.o += -I$(srctree)/tools/lib/bpf/
179
180HOSTCFLAGS_trace_output_user.o += -I$(srctree)/tools/lib/bpf/
181HOSTCFLAGS_offwaketime_user.o += -I$(srctree)/tools/lib/bpf/
182HOSTCFLAGS_spintest_user.o += -I$(srctree)/tools/lib/bpf/
183HOSTCFLAGS_trace_event_user.o += -I$(srctree)/tools/lib/bpf/
184HOSTCFLAGS_sampleip_user.o += -I$(srctree)/tools/lib/bpf/
185HOSTCFLAGS_task_fd_query_user.o += -I$(srctree)/tools/lib/bpf/
186HOSTCFLAGS_xdp_sample_pkts_user.o += -I$(srctree)/tools/lib/bpf/
187
188KBUILD_HOSTLDLIBS		+= $(LIBBPF) -lelf
189HOSTLDLIBS_tracex4		+= -lrt
190HOSTLDLIBS_trace_output	+= -lrt
191HOSTLDLIBS_map_perf_test	+= -lrt
192HOSTLDLIBS_test_overhead	+= -lrt
193HOSTLDLIBS_xdpsock		+= -pthread
194
195# Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline:
196#  make samples/bpf/ LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang
197LLC ?= llc
198CLANG ?= clang
199LLVM_OBJCOPY ?= llvm-objcopy
200BTF_PAHOLE ?= pahole
201
202# Detect that we're cross compiling and use the cross compiler
203ifdef CROSS_COMPILE
204HOSTCC = $(CROSS_COMPILE)gcc
205CLANG_ARCH_ARGS = -target $(ARCH)
206endif
207
208BTF_LLC_PROBE := $(shell $(LLC) -march=bpf -mattr=help 2>&1 | grep dwarfris)
209BTF_PAHOLE_PROBE := $(shell $(BTF_PAHOLE) --help 2>&1 | grep BTF)
210BTF_OBJCOPY_PROBE := $(shell $(LLVM_OBJCOPY) --help 2>&1 | grep -i 'usage.*llvm')
211BTF_LLVM_PROBE := $(shell echo "int main() { return 0; }" | \
212			  $(CLANG) -target bpf -O2 -g -c -x c - -o ./llvm_btf_verify.o; \
213			  readelf -S ./llvm_btf_verify.o | grep BTF; \
214			  /bin/rm -f ./llvm_btf_verify.o)
215
216ifneq ($(BTF_LLVM_PROBE),)
217	EXTRA_CFLAGS += -g
218else
219ifneq ($(and $(BTF_LLC_PROBE),$(BTF_PAHOLE_PROBE),$(BTF_OBJCOPY_PROBE)),)
220	EXTRA_CFLAGS += -g
221	LLC_FLAGS += -mattr=dwarfris
222	DWARF2BTF = y
223endif
224endif
225
226# Trick to allow make to be run from this directory
227all:
228	$(MAKE) -C ../../ $(CURDIR)/ BPF_SAMPLES_PATH=$(CURDIR)
229
230clean:
231	$(MAKE) -C ../../ M=$(CURDIR) clean
232	@rm -f *~
233
234$(LIBBPF): FORCE
235# Fix up variables inherited from Kbuild that tools/ build system won't like
236	$(MAKE) -C $(dir $@) RM='rm -rf' LDFLAGS= srctree=$(BPF_SAMPLES_PATH)/../../ O=
237
238$(obj)/syscall_nrs.h:	$(obj)/syscall_nrs.s FORCE
239	$(call filechk,offsets,__SYSCALL_NRS_H__)
240
241targets += syscall_nrs.s
242clean-files += syscall_nrs.h
243
244FORCE:
245
246
247# Verify LLVM compiler tools are available and bpf target is supported by llc
248.PHONY: verify_cmds verify_target_bpf $(CLANG) $(LLC)
249
250verify_cmds: $(CLANG) $(LLC)
251	@for TOOL in $^ ; do \
252		if ! (which -- "$${TOOL}" > /dev/null 2>&1); then \
253			echo "*** ERROR: Cannot find LLVM tool $${TOOL}" ;\
254			exit 1; \
255		else true; fi; \
256	done
257
258verify_target_bpf: verify_cmds
259	@if ! (${LLC} -march=bpf -mattr=help > /dev/null 2>&1); then \
260		echo "*** ERROR: LLVM (${LLC}) does not support 'bpf' target" ;\
261		echo "   NOTICE: LLVM version >= 3.7.1 required" ;\
262		exit 2; \
263	else true; fi
264
265$(BPF_SAMPLES_PATH)/*.c: verify_target_bpf $(LIBBPF)
266$(src)/*.c: verify_target_bpf $(LIBBPF)
267
268$(obj)/tracex5_kern.o: $(obj)/syscall_nrs.h
269$(obj)/hbm_out_kern.o: $(src)/hbm.h $(src)/hbm_kern.h
270$(obj)/hbm.o: $(src)/hbm.h
271
272# asm/sysreg.h - inline assembly used by it is incompatible with llvm.
273# But, there is no easy way to fix it, so just exclude it since it is
274# useless for BPF samples.
275$(obj)/%.o: $(src)/%.c
276	@echo "  CLANG-bpf " $@
277	$(Q)$(CLANG) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) $(EXTRA_CFLAGS) -I$(obj) \
278		-I$(srctree)/tools/testing/selftests/bpf/ \
279		-D__KERNEL__ -D__BPF_TRACING__ -Wno-unused-value -Wno-pointer-sign \
280		-D__TARGET_ARCH_$(ARCH) -Wno-compare-distinct-pointer-types \
281		-Wno-gnu-variable-sized-type-not-at-end \
282		-Wno-address-of-packed-member -Wno-tautological-compare \
283		-Wno-unknown-warning-option $(CLANG_ARCH_ARGS) \
284		-I$(srctree)/samples/bpf/ -include asm_goto_workaround.h \
285		-O2 -emit-llvm -c $< -o -| $(LLC) -march=bpf $(LLC_FLAGS) -filetype=obj -o $@
286ifeq ($(DWARF2BTF),y)
287	$(BTF_PAHOLE) -J $@
288endif
289