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We need to remove the base from the result too. Therefore, we could get precise result from cycle counter. Signed-off-by: Xu Yang --- drivers/perf/fsl_imx8_ddr_perf.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/perf/fsl_imx8_ddr_perf.c b/drivers/perf/fsl_imx8_ddr_perf.c index cc7693f49950..4e6cbfc48429 100644 --- a/drivers/perf/fsl_imx8_ddr_perf.c +++ b/drivers/perf/fsl_imx8_ddr_perf.c @@ -482,6 +482,13 @@ static void ddr_perf_event_update(struct perf_event *event) int ret; new_raw_count = ddr_perf_read_counter(pmu, counter); + /* Workaround for i.MXMP */ + if ((pmu->devtype_data->quirks & DDR_CAP_AXI_ID_FILTER_ENHANCED) == + DDR_CAP_AXI_ID_FILTER_ENHANCED) { + if (counter == EVENT_CYCLES_COUNTER) + new_raw_count -= 0xF0000000; + } + local64_add(new_raw_count, &event->count); /*