perf_event: Add alignment-faults and emulation-faults software events

Add two more software events that are common to many cpus.

Alignment faults: When a load or store is not aligned properly.

Emulation faults: When an instruction is emulated in software.

Both cause a very significant slowdown (100x or worse), so identifying and
fixing them is very important.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index 9d0b5c665883..0683b33cbb28 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -4186,6 +4186,8 @@ static const struct pmu *sw_perf_event_init(struct perf_event *event)
         case PERF_COUNT_SW_PAGE_FAULTS_MAJ:
         case PERF_COUNT_SW_CONTEXT_SWITCHES:
         case PERF_COUNT_SW_CPU_MIGRATIONS:
+        case PERF_COUNT_SW_ALIGNMENT_FAULTS:
+        case PERF_COUNT_SW_EMULATION_FAULTS:
                 if (!event->parent) {
                         atomic_inc(&perf_swevent_enabled[event_id]);
                         event->destroy = sw_perf_event_destroy;