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SubjectRe: [PATCH v3 5/7] cpufreq: add function to get the hardware max frequency
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On 2/11/20 6:45 PM, Ionela Voinescu wrote:
> +/**
> + * cpufreq_get_hw_max_freq - get the max hardware frequency of the CPU
> + * @cpu: CPU number
> + *
> + * The default return value is the max_freq field of cpuinfo.
> + */
> +__weak unsigned int cpufreq_get_hw_max_freq(unsigned int cpu)
> +{
> + struct cpufreq_policy *policy = cpufreq_cpu_get(cpu);
> + unsigned int ret_freq = 0;
> +
> + if (policy) {
> + ret_freq = policy->cpuinfo.max_freq;
> + cpufreq_cpu_put(policy);

What about intel_pstate / turbo stuff? IIRC one of Giovanni's issues was that
turbo freq is not always reported as the max freq. Dunno if we can do
anything about it; at the very least maybe document the caveat?

> + }
> +
> + return ret_freq;
> +}
> +EXPORT_SYMBOL(cpufreq_get_hw_max_freq);
> +
> static unsigned int __cpufreq_get(struct cpufreq_policy *policy)
> {
> if (unlikely(policy_is_inactive(policy)))

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