arm-cci: Add routines to save/restore all counters

	pmu_write_register(cci_pmu, event, idx, CCI_PMU_EVT_SEL);

}

/*

 * For all counters on the CCI-PMU, disable any 'enabled' counters,

 * saving the changed counters in the mask, so that we can restore

 * it later using pmu_restore_counters. The mask is private to the

 * caller. We cannot rely on the used_mask maintained by the CCI_PMU

 * as it only tells us if the counter is assigned to perf_event or not.

 * The state of the perf_event cannot be locked by the PMU layer, hence

 * we check the individual counter status (which can be locked by

 * cci_pm->hw_events->pmu_lock).

 *

 * @mask should be initialised to empty by the caller.

 */

static void __maybe_unused

pmu_save_counters(struct cci_pmu *cci_pmu, unsigned long *mask)

{

	int i;

	for (i = 0; i < cci_pmu->num_cntrs; i++) {

		if (pmu_counter_is_enabled(cci_pmu, i)) {

			set_bit(i, mask);

			pmu_disable_counter(cci_pmu, i);

		}

	}

}

/*

 * Restore the status of the counters. Reversal of the pmu_save_counters().

 * For each counter set in the mask, enable the counter back.

 */

static void __maybe_unused

pmu_restore_counters(struct cci_pmu *cci_pmu, unsigned long *mask)

{

	int i;

	for_each_set_bit(i, mask, cci_pmu->num_cntrs)

		pmu_enable_counter(cci_pmu, i);

}

/*

 * Returns the number of programmable counters actually implemented

 * by the cci