[PATCH bpf-next 2/3] selftests: bpf: extend sub-register mode compilation to all bpf object files

[Jiong Wang]

At the moment, we only do extra sub-register mode compilation on bpf object
files used by "test_progs". These object files are really loaded and
executed.

This patch further extends sub-register mode compilation to all bpf object
files, even those without corresponding runtime tests. Because this could
help testing LLVM sub-register code-gen, kernel bpf selftest has much more
C testcases with reasonable size and complexity compared with LLVM
testsuite which only contains unit tests.

There were some file duplication inside BPF_OBJ_FILES_DUAL_COMPILE which
is removed now.

Reviewed-by: Jakub Kicinski <jakub.kicin...@netronome.com>
Signed-off-by: Jiong Wang <jiong.w...@netronome.com>
---
 tools/testing/selftests/bpf/Makefile | 21 ++++++++-------------
 1 file changed, 8 insertions(+), 13 deletions(-)

diff --git a/tools/testing/selftests/bpf/Makefile 
b/tools/testing/selftests/bpf/Makefile
index 383d2ff..70b2570 100644
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile
@@ -35,20 +35,15 @@ BPF_OBJ_FILES = \
        sendmsg4_prog.o sendmsg6_prog.o test_lirc_mode2_kern.o \
        get_cgroup_id_kern.o socket_cookie_prog.o test_select_reuseport_kern.o \
        test_skb_cgroup_id_kern.o bpf_flow.o netcnt_prog.o test_xdp_vlan.o \
-       xdp_dummy.o test_map_in_map.o test_spin_lock.o test_map_lock.o
-
-# Objects are built with default compilation flags and with sub-register
-# code-gen enabled.
-BPF_OBJ_FILES_DUAL_COMPILE = \
-       test_pkt_access.o test_pkt_access.o test_xdp.o test_adjust_tail.o \
-       test_l4lb.o test_l4lb_noinline.o test_xdp_noinline.o test_tcp_estats.o \
+       xdp_dummy.o test_map_in_map.o test_spin_lock.o test_map_lock.o \
+       test_pkt_access.o test_xdp.o test_adjust_tail.o test_l4lb.o \
+       test_l4lb_noinline.o test_xdp_noinline.o test_tcp_estats.o \
        test_obj_id.o test_pkt_md_access.o test_tracepoint.o \
-       test_stacktrace_map.o test_stacktrace_map.o test_stacktrace_build_id.o \
-       test_stacktrace_build_id.o test_get_stack_rawtp.o \
-       test_get_stack_rawtp.o test_tracepoint.o test_sk_lookup_kern.o \
-       test_queue_map.o test_stack_map.o
+       test_stacktrace_map.o test_stacktrace_build_id.o \
+       test_get_stack_rawtp.o test_sk_lookup_kern.o test_queue_map.o \
+       test_stack_map.o
 
-TEST_GEN_FILES = $(BPF_OBJ_FILES) $(BPF_OBJ_FILES_DUAL_COMPILE)
+TEST_GEN_FILES = $(BPF_OBJ_FILES)
 
 # Also test sub-register code-gen if LLVM + kernel both has eBPF v3 processor
 # support which is the first version to contain both ALU32 and JMP32
@@ -58,7 +53,7 @@ SUBREG_CODEGEN := $(shell echo "int cal(int a) { return a > 
0; }" | \
                        $(LLC) -mattr=+alu32 -mcpu=probe 2>&1 | \
                        grep 'if w')
 ifneq ($(SUBREG_CODEGEN),)
-TEST_GEN_FILES += $(patsubst %.o,alu32/%.o, $(BPF_OBJ_FILES_DUAL_COMPILE))
+TEST_GEN_FILES += $(patsubst %.o,alu32/%.o, $(BPF_OBJ_FILES))
 endif
 
 # Order correspond to 'make run_tests' order
-- 
2.7.4