static void etm_enable_hw_smp_call(void *info)
{
struct etm_enable_arg *arg = info;
if (WARN_ON(!arg))
return;
arg->rc = etm_enable_hw(arg->drvdata);
}
static int etm_enable_perf(struct coresight_device *csdev,
struct perf_event *event)
{
struct etm_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
if (WARN_ON_ONCE(drvdata->cpu != smp_processor_id()))
return -EINVAL;
/* Configure the tracer based on the session's specifics */
etm_parse_event_config(drvdata, event);
/* And enable it */
return etm_enable_hw(drvdata);
}
static int etm_starting_cpu(unsigned int cpu)
{
if (!etmdrvdata[cpu])
return 0;
spin_lock(&etmdrvdata[cpu]->spinlock);
if (!etmdrvdata[cpu]->os_unlock) {
etm_os_unlock(etmdrvdata[cpu]);
etmdrvdata[cpu]->os_unlock = true;
}
if (local_read(&etmdrvdata[cpu]->mode))
etm_enable_hw(etmdrvdata[cpu]);
spin_unlock(&etmdrvdata[cpu]->spinlock);
return 0;
}
static int etm_cpu_callback(struct notifier_block *nfb, unsigned long action,
void *hcpu)
{
unsigned int cpu = (unsigned long)hcpu;
if (!etmdrvdata[cpu])
goto out;
switch (action & (~CPU_TASKS_FROZEN)) {
case CPU_STARTING:
spin_lock(&etmdrvdata[cpu]->spinlock);
if (!etmdrvdata[cpu]->os_unlock) {
etm_os_unlock(etmdrvdata[cpu]);
etmdrvdata[cpu]->os_unlock = true;
}
if (etmdrvdata[cpu]->enable)
etm_enable_hw(etmdrvdata[cpu]);
spin_unlock(&etmdrvdata[cpu]->spinlock);
break;
case CPU_ONLINE:
if (etmdrvdata[cpu]->boot_enable &&
!etmdrvdata[cpu]->sticky_enable)
coresight_enable(etmdrvdata[cpu]->csdev);
break;
case CPU_DYING:
spin_lock(&etmdrvdata[cpu]->spinlock);
if (etmdrvdata[cpu]->enable)
etm_disable_hw(etmdrvdata[cpu]);
spin_unlock(&etmdrvdata[cpu]->spinlock);
break;
}
out:
return NOTIFY_OK;
}
