static int etm4_disable_perf(struct coresight_device *csdev)
{
struct etmv4_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
if (WARN_ON_ONCE(drvdata->cpu != smp_processor_id()))
return -EINVAL;
etm4_disable_hw(drvdata);
return 0;
}
static int etm4_dying_cpu(unsigned int cpu)
{
if (!etmdrvdata[cpu])
return 0;
spin_lock(&etmdrvdata[cpu]->spinlock);
if (local_read(&etmdrvdata[cpu]->mode))
etm4_disable_hw(etmdrvdata[cpu]);
spin_unlock(&etmdrvdata[cpu]->spinlock);
return 0;
}
static int etm4_disable_perf(struct coresight_device *csdev,
struct perf_event *event)
{
u32 control;
struct etm_filters *filters = event->hw.addr_filters;
struct etmv4_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
if (WARN_ON_ONCE(drvdata->cpu != smp_processor_id()))
return -EINVAL;
etm4_disable_hw(drvdata);
/*
* Check if the start/stop logic was active when the unit was stopped.
* That way we can re-enable the start/stop logic when the process is
* scheduled again. Configuration of the start/stop logic happens in
* function etm4_set_event_filters().
*/
control = readl_relaxed(drvdata->base + TRCVICTLR);
/* TRCVICTLR::SSSTATUS, bit[9] */
filters->ssstatus = (control & BIT(9));
return 0;
}
