arm_cspmu_reset_counters() inherently also stops them since it is
writing 0 to PMCR.E, so there should be no need to do that twice.
Also tidy up the reset routine itself for consistency with the start
and stop routines, and to be clear at first glance that it is simply
writing a constant value.
Reviewed-by: Ilkka Koskinen <ilkka@os.amperecomputing.com>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/3105815327989f6bb7bb068994d0eb4096b4ef64.1706718007.git.robin.murphy@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
static inline void arm_cspmu_reset_counters(struct arm_cspmu *cspmu)
{
- u32 pmcr = 0;
-
- pmcr |= PMCR_P;
- pmcr |= PMCR_C;
- writel(pmcr, cspmu->base0 + PMCR);
+ writel(PMCR_C | PMCR_P, cspmu->base0 + PMCR);
}
static inline void arm_cspmu_start_counters(struct arm_cspmu *cspmu)
};
/* Hardware counter init */
- arm_cspmu_stop_counters(cspmu);
arm_cspmu_reset_counters(cspmu);
ret = perf_pmu_register(&cspmu->pmu, cspmu->name, -1);