Commit-ID: ceb90d9e0248947839a0ff4bee98cf28695a6020 Gitweb: https://git.kernel.org/tip/ceb90d9e0248947839a0ff4bee98cf28695a6020 Author: Kan Liang <[email protected]> AuthorDate: Mon, 12 Feb 2018 14:20:34 -0800 Committer: Ingo Molnar <[email protected]> CommitDate: Fri, 9 Mar 2018 08:22:22 +0100
perf/x86/intel: Fix PMU read for auto-reload Auto-reload events needs to be specially handled in event count read. Auto-reload is only available for intel_pmu. Signed-off-by: Kan Liang <[email protected]> Signed-off-by: Peter Zijlstra (Intel) <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Arnaldo Carvalho de Melo <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Stephane Eranian <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Vince Weaver <[email protected]> Cc: [email protected] Fixes: b8241d20699e ("perf/x86/intel: Implement batched PEBS interrupt handling (large PEBS interrupt threshold)") Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]> --- arch/x86/events/intel/core.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c index 1ba7ca7b675d..41c68d337e84 100644 --- a/arch/x86/events/intel/core.c +++ b/arch/x86/events/intel/core.c @@ -2060,6 +2060,14 @@ static void intel_pmu_del_event(struct perf_event *event) intel_pmu_pebs_del(event); } +static void intel_pmu_read_event(struct perf_event *event) +{ + if (event->hw.flags & PERF_X86_EVENT_AUTO_RELOAD) + intel_pmu_auto_reload_read(event); + else + x86_perf_event_update(event); +} + static void intel_pmu_enable_fixed(struct hw_perf_event *hwc) { int idx = hwc->idx - INTEL_PMC_IDX_FIXED; @@ -3503,6 +3511,7 @@ static __initconst const struct x86_pmu intel_pmu = { .disable = intel_pmu_disable_event, .add = intel_pmu_add_event, .del = intel_pmu_del_event, + .read = intel_pmu_read_event, .hw_config = intel_pmu_hw_config, .schedule_events = x86_schedule_events, .eventsel = MSR_ARCH_PERFMON_EVENTSEL0,
