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| author | Thomas Richter <tmricht@linux.ibm.com> | 2019-06-04 07:35:04 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-07-31 07:28:24 +0200 |
| commit | 0e8529143a212a2f93fd5dfa63f83275f7c44655 (patch) | |
| tree | 9188f1ab988536fd117bbac02f4245328376ed1e /tools | |
| parent | 295cf005cdf58736940c9fd913db4c9c5815f51a (diff) | |
| download | linux-stable-0e8529143a212a2f93fd5dfa63f83275f7c44655.tar.gz linux-stable-0e8529143a212a2f93fd5dfa63f83275f7c44655.tar.bz2 linux-stable-0e8529143a212a2f93fd5dfa63f83275f7c44655.zip | |
perf test 6: Fix missing kvm module load for s390
[ Upstream commit 53fe307dfd309e425b171f6272d64296a54f4dff ]
Command
# perf test -Fv 6
fails with error
running test 100 'kvm-s390:kvm_s390_create_vm' failed to parse
event 'kvm-s390:kvm_s390_create_vm', err -1, str 'unknown tracepoint'
event syntax error: 'kvm-s390:kvm_s390_create_vm'
\___ unknown tracepoint
when the kvm module is not loaded or not built in.
Fix this by adding a valid function which tests if the module
is loaded. Loaded modules (or builtin KVM support) have a
directory named
/sys/kernel/debug/tracing/events/kvm-s390
for this tracepoint.
Check for existence of this directory.
Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/20190604053504.43073-1-tmricht@linux.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/tests/parse-events.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/tools/perf/tests/parse-events.c b/tools/perf/tests/parse-events.c index f0679613bd18..424b82a7d078 100644 --- a/tools/perf/tests/parse-events.c +++ b/tools/perf/tests/parse-events.c @@ -19,6 +19,32 @@ #define PERF_TP_SAMPLE_TYPE (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME | \ PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD) +#if defined(__s390x__) +/* Return true if kvm module is available and loaded. Test this + * and retun success when trace point kvm_s390_create_vm + * exists. Otherwise this test always fails. + */ +static bool kvm_s390_create_vm_valid(void) +{ + char *eventfile; + bool rc = false; + + eventfile = get_events_file("kvm-s390"); + + if (eventfile) { + DIR *mydir = opendir(eventfile); + + if (mydir) { + rc = true; + closedir(mydir); + } + put_events_file(eventfile); + } + + return rc; +} +#endif + static int test__checkevent_tracepoint(struct perf_evlist *evlist) { struct perf_evsel *evsel = perf_evlist__first(evlist); @@ -1600,6 +1626,7 @@ static struct evlist_test test__events[] = { { .name = "kvm-s390:kvm_s390_create_vm", .check = test__checkevent_tracepoint, + .valid = kvm_s390_create_vm_valid, .id = 100, }, #endif |