diff options
Diffstat (limited to 'arch/x86/kernel/cpu/perf_event.c')
-rw-r--r-- | arch/x86/kernel/cpu/perf_event.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c index 39737a678a86..8a1fa23452d6 100644 --- a/arch/x86/kernel/cpu/perf_event.c +++ b/arch/x86/kernel/cpu/perf_event.c | |||
@@ -1392,6 +1392,46 @@ static struct attribute_group x86_pmu_events_group = { | |||
1392 | .attrs = events_attr, | 1392 | .attrs = events_attr, |
1393 | }; | 1393 | }; |
1394 | 1394 | ||
1395 | ssize_t x86_event_sysfs_show(char *page, u64 config) | ||
1396 | { | ||
1397 | u64 event = (config & ARCH_PERFMON_EVENTSEL_EVENT); | ||
1398 | u64 umask = (config & ARCH_PERFMON_EVENTSEL_UMASK) >> 8; | ||
1399 | u64 cmask = (config & ARCH_PERFMON_EVENTSEL_CMASK) >> 24; | ||
1400 | bool edge = (config & ARCH_PERFMON_EVENTSEL_EDGE); | ||
1401 | bool pc = (config & ARCH_PERFMON_EVENTSEL_PIN_CONTROL); | ||
1402 | bool any = (config & ARCH_PERFMON_EVENTSEL_ANY); | ||
1403 | bool inv = (config & ARCH_PERFMON_EVENTSEL_INV); | ||
1404 | ssize_t ret; | ||
1405 | |||
1406 | /* | ||
1407 | * We have whole page size to spend and just little data | ||
1408 | * to write, so we can safely use sprintf. | ||
1409 | */ | ||
1410 | ret = sprintf(page, "event=0x%02llx", event); | ||
1411 | |||
1412 | if (umask) | ||
1413 | ret += sprintf(page + ret, ",umask=0x%02llx", umask); | ||
1414 | |||
1415 | if (edge) | ||
1416 | ret += sprintf(page + ret, ",edge"); | ||
1417 | |||
1418 | if (pc) | ||
1419 | ret += sprintf(page + ret, ",pc"); | ||
1420 | |||
1421 | if (any) | ||
1422 | ret += sprintf(page + ret, ",any"); | ||
1423 | |||
1424 | if (inv) | ||
1425 | ret += sprintf(page + ret, ",inv"); | ||
1426 | |||
1427 | if (cmask) | ||
1428 | ret += sprintf(page + ret, ",cmask=0x%02llx", cmask); | ||
1429 | |||
1430 | ret += sprintf(page + ret, "\n"); | ||
1431 | |||
1432 | return ret; | ||
1433 | } | ||
1434 | |||
1395 | static int __init init_hw_perf_events(void) | 1435 | static int __init init_hw_perf_events(void) |
1396 | { | 1436 | { |
1397 | struct x86_pmu_quirk *quirk; | 1437 | struct x86_pmu_quirk *quirk; |