From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/drivers/perf/fsl_imx8_ddr_perf.c | 24 +++++++++---------------
1 files changed, 9 insertions(+), 15 deletions(-)
diff --git a/kernel/drivers/perf/fsl_imx8_ddr_perf.c b/kernel/drivers/perf/fsl_imx8_ddr_perf.c
index e09bbf3..8dfb675 100644
--- a/kernel/drivers/perf/fsl_imx8_ddr_perf.c
+++ b/kernel/drivers/perf/fsl_imx8_ddr_perf.c
@@ -82,6 +82,7 @@
const struct fsl_ddr_devtype_data *devtype_data;
int irq;
int id;
+ int active_counter;
};
enum ddr_perf_filter_capabilities {
@@ -414,6 +415,10 @@
ddr_perf_counter_enable(pmu, event->attr.config, counter, true);
+ if (!pmu->active_counter++)
+ ddr_perf_counter_enable(pmu, EVENT_CYCLES_ID,
+ EVENT_CYCLES_COUNTER, true);
+
hwc->state = 0;
}
@@ -468,6 +473,10 @@
ddr_perf_counter_enable(pmu, event->attr.config, counter, false);
ddr_perf_event_update(event);
+ if (!--pmu->active_counter)
+ ddr_perf_counter_enable(pmu, EVENT_CYCLES_ID,
+ EVENT_CYCLES_COUNTER, false);
+
hwc->state |= PERF_HES_STOPPED;
}
@@ -486,25 +495,10 @@
static void ddr_perf_pmu_enable(struct pmu *pmu)
{
- struct ddr_pmu *ddr_pmu = to_ddr_pmu(pmu);
-
- /* enable cycle counter if cycle is not active event list */
- if (ddr_pmu->events[EVENT_CYCLES_COUNTER] == NULL)
- ddr_perf_counter_enable(ddr_pmu,
- EVENT_CYCLES_ID,
- EVENT_CYCLES_COUNTER,
- true);
}
static void ddr_perf_pmu_disable(struct pmu *pmu)
{
- struct ddr_pmu *ddr_pmu = to_ddr_pmu(pmu);
-
- if (ddr_pmu->events[EVENT_CYCLES_COUNTER] == NULL)
- ddr_perf_counter_enable(ddr_pmu,
- EVENT_CYCLES_ID,
- EVENT_CYCLES_COUNTER,
- false);
}
static int ddr_perf_init(struct ddr_pmu *pmu, void __iomem *base,
--
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