cpufreq: intel_pstate: Make HWP limits compatible with legacy
Under HWP the performance limits are calculated using max_perf_pct and min_perf_pct using possible performance, not available performance. The available performance can be reduced by no_turbo setting. To make compatible with legacy mode, use max/min performance percentage with respect to available performance. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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@ -875,7 +875,10 @@ static void intel_pstate_hwp_set(struct cpufreq_policy *policy)
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rdmsrl_on_cpu(cpu, MSR_HWP_CAPABILITIES, &cap);
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rdmsrl_on_cpu(cpu, MSR_HWP_CAPABILITIES, &cap);
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hw_min = HWP_LOWEST_PERF(cap);
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hw_min = HWP_LOWEST_PERF(cap);
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hw_max = HWP_HIGHEST_PERF(cap);
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if (limits->no_turbo)
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hw_max = HWP_GUARANTEED_PERF(cap);
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else
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hw_max = HWP_HIGHEST_PERF(cap);
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range = hw_max - hw_min;
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range = hw_max - hw_min;
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max_perf_pct = perf_limits->max_perf_pct;
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max_perf_pct = perf_limits->max_perf_pct;
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@ -889,11 +892,6 @@ static void intel_pstate_hwp_set(struct cpufreq_policy *policy)
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adj_range = max_perf_pct * range / 100;
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adj_range = max_perf_pct * range / 100;
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max = hw_min + adj_range;
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max = hw_min + adj_range;
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if (limits->no_turbo) {
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hw_max = HWP_GUARANTEED_PERF(cap);
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if (hw_max < max)
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max = hw_max;
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}
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value &= ~HWP_MAX_PERF(~0L);
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value &= ~HWP_MAX_PERF(~0L);
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value |= HWP_MAX_PERF(max);
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value |= HWP_MAX_PERF(max);
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