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Diffstat (limited to 'arch/x86/events/amd/ibs.c')
-rw-r--r--arch/x86/events/amd/ibs.c13
1 files changed, 10 insertions, 3 deletions
diff --git a/arch/x86/events/amd/ibs.c b/arch/x86/events/amd/ibs.c
index 62f317c9113a..5b35b7ea5d72 100644
--- a/arch/x86/events/amd/ibs.c
+++ b/arch/x86/events/amd/ibs.c
@@ -661,10 +661,17 @@ fail:
throttle = perf_event_overflow(event, &data, &regs);
out:
- if (throttle)
+ if (throttle) {
perf_ibs_stop(event, 0);
- else
- perf_ibs_enable_event(perf_ibs, hwc, period >> 4);
+ } else {
+ period >>= 4;
+
+ if ((ibs_caps & IBS_CAPS_RDWROPCNT) &&
+ (*config & IBS_OP_CNT_CTL))
+ period |= *config & IBS_OP_CUR_CNT_RAND;
+
+ perf_ibs_enable_event(perf_ibs, hwc, period);
+ }
perf_event_update_userpage(event);