Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 2055929c authored by Santosh Mardi's avatar Santosh Mardi Committed by Gerrit - the friendly Code Review server
Browse files

PM / devfreq: export functions to allow freeing of pmu counters 



Memlat and compute governors are made immutable to avoid governor
switch at run time as the devices using these governors are tightly
coupled with hardware features. These governors allocate pmu counters
to count various events used in the algorithm. These counters are
allocated exclusively for algorithm's use.

This leaves limited counters available for other uses in the system
such as profiling in user space using perf tool. Add and export a
function in devfreq memlat governor to remove immutable flag to allow
governor switch, which in turn can free pmu counters.

Similarly add and export a function in rimps_memlat driver to
free pmu counters.

The intended use of these functions is to be called by test modules
to allow freeing of pmu counters at runtime.

Change-Id: I243a3201368d5a82aeaf820e775cdc1aecdfea07
Signed-off-by: default avatarSantosh Mardi <gsantosh@codeaurora.org>
parent 3e84ab94

drivers/devfreq/governor_memlat.c

+10 −0
Original line number Diff line number Diff line
@@ -451,6 +451,16 @@ static struct devfreq_governor devfreq_gov_compute = { 
	.event_handler = devfreq_memlat_ev_handler,

};



void memlat_set_immutable_flag(unsigned int flag)

{

	unsigned int *memlat_ptr = (unsigned int *)&devfreq_gov_memlat.immutable;

	unsigned int *compute_ptr = (unsigned int *)&devfreq_gov_compute.immutable;



	*memlat_ptr = flag;

	*compute_ptr = flag;

}

EXPORT_SYMBOL(memlat_set_immutable_flag);



#define NUM_COLS	2

static struct core_dev_map *init_core_dev_map(struct device *dev,

					struct device_node *of_node,

drivers/soc/qcom/rimps_memlat.c

+15 −0
Original line number Diff line number Diff line
@@ -807,6 +807,21 @@ static int memlat_event_cpu_hp_init(void) 
	return ret;

}



void rimps_force_free_pmu_events(unsigned int flag)

{

	unsigned int cpu;



	get_online_cpus();

	for_each_possible_cpu(cpu) {

		if (flag)

			memlat_event_hotplug_going_down(cpu);

		else

			memlat_event_hotplug_coming_up(cpu);

	}

	put_online_cpus();

}

EXPORT_SYMBOL(rimps_force_free_pmu_events);



static int memlat_idle_notif(struct notifier_block *nb,

					unsigned long action,

					void *data)