perf test bpf: Check for libtraceevent support

The "bpf" tests fails in environment with missing libtraceevent support
as below:

  # ./perf test 36
  36: BPF filter                          :
  36.1: Basic BPF filtering               : FAILED!
  36.2: BPF pinning                       : FAILED!
  36.3: BPF prologue generation           : FAILED!

The environment has clang but missing the libtraceevent devel. Hence
perf is compiled without libtraceevent support.

Detailed logs:
	./perf test -v "Basic BPF filtering"

	Failed to add BPF event syscalls:sys_enter_epoll_pwait
	bpf: tracepoint call back failed, stop iterate
	Failed to add events selected by BPF

The bpf tests tris to add probe event which fails at
"parse_events_add_tracepoint" function due to missing libtraceevent. Add
check for "HAVE_LIBTRACEEVENT" in the "tests/bpf.c" before proceeding
with the test.

With the change,

	# ./perf test 36
 	36: BPF filter                    :
 	36.1: Basic BPF filtering         : Skip (not compiled in or missing libtraceevent support)
 	36.2: BPF pinning                 : Skip (not compiled in or missing libtraceevent support)
 	36.3: BPF prologue generation     : Skip (not compiled in or missing libtraceevent support)

Signed-off-by: Athira Jajeev <[email protected]>
Tested-by: Arnaldo Carvalho de Melo <[email protected]>
Tested-by: Disha Goel <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Ian Rogers <[email protected]>
Cc: James Clark <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Kajol Jain <[email protected]>
Cc: Madhavan Srinivasan <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Nageswara R Sastry <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: [email protected]
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

Author: athira-rajeev

tools/perf/tests/bpf.c

@@ -23,7 +23,7 @@
 #define NR_ITERS       111
 #define PERF_TEST_BPF_PATH "/sys/fs/bpf/perf_test"
 
-#ifdef HAVE_LIBBPF_SUPPORT
+#if defined(HAVE_LIBBPF_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
 #include <linux/bpf.h>
 #include <bpf/bpf.h>
 
@@ -330,39 +330,39 @@ static int test__bpf(int i)
 static int test__basic_bpf_test(struct test_suite *test __maybe_unused,
 				int subtest __maybe_unused)
 {
-#ifdef HAVE_LIBBPF_SUPPORT
+#if defined(HAVE_LIBBPF_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
 	return test__bpf(0);
 #else
-	pr_debug("Skip BPF test because BPF support is not compiled\n");
+	pr_debug("Skip BPF test because BPF or libtraceevent support is not compiled\n");
 	return TEST_SKIP;
 #endif
 }
 
 static int test__bpf_pinning(struct test_suite *test __maybe_unused,
 			     int subtest __maybe_unused)
 {
-#ifdef HAVE_LIBBPF_SUPPORT
+#if defined(HAVE_LIBBPF_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
 	return test__bpf(1);
 #else
-	pr_debug("Skip BPF test because BPF support is not compiled\n");
+	pr_debug("Skip BPF test because BPF or libtraceevent support is not compiled\n");
 	return TEST_SKIP;
 #endif
 }
 
 static int test__bpf_prologue_test(struct test_suite *test __maybe_unused,
 				   int subtest __maybe_unused)
 {
-#if defined(HAVE_LIBBPF_SUPPORT) && defined(HAVE_BPF_PROLOGUE)
+#if defined(HAVE_LIBBPF_SUPPORT) && defined(HAVE_BPF_PROLOGUE) && defined(HAVE_LIBTRACEEVENT)
 	return test__bpf(2);
 #else
-	pr_debug("Skip BPF test because BPF support is not compiled\n");
+	pr_debug("Skip BPF test because BPF or libtraceevent support is not compiled\n");
 	return TEST_SKIP;
 #endif
 }
 
 
 static struct test_case bpf_tests[] = {
-#ifdef HAVE_LIBBPF_SUPPORT
+#if defined(HAVE_LIBBPF_SUPPORT) && defined(HAVE_LIBTRACEEVENT)
 	TEST_CASE("Basic BPF filtering", basic_bpf_test),
 	TEST_CASE_REASON("BPF pinning", bpf_pinning,
 			"clang isn't installed or environment missing BPF support"),
@@ -373,9 +373,9 @@ static struct test_case bpf_tests[] = {
 	TEST_CASE_REASON("BPF prologue generation", bpf_prologue_test, "not compiled in"),
 #endif
 #else
-	TEST_CASE_REASON("Basic BPF filtering", basic_bpf_test, "not compiled in"),
-	TEST_CASE_REASON("BPF pinning", bpf_pinning, "not compiled in"),
-	TEST_CASE_REASON("BPF prologue generation", bpf_prologue_test, "not compiled in"),
+	TEST_CASE_REASON("Basic BPF filtering", basic_bpf_test, "not compiled in or missing libtraceevent support"),
+	TEST_CASE_REASON("BPF pinning", bpf_pinning, "not compiled in or missing libtraceevent support"),
+	TEST_CASE_REASON("BPF prologue generation", bpf_prologue_test, "not compiled in or missing libtraceevent support"),
 #endif
 	{ .name = NULL, }
 };