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>

diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index 735e3e8..9548209 100644 (file)
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -875,7 +875,10 @@ static void intel_pstate_hwp_set(struct cpufreq_policy *policy)
 
                rdmsrl_on_cpu(cpu, MSR_HWP_CAPABILITIES, &cap);
                hw_min = HWP_LOWEST_PERF(cap);
-               hw_max = HWP_HIGHEST_PERF(cap);
+               if (limits->no_turbo)
+                       hw_max = HWP_GUARANTEED_PERF(cap);
+               else
+                       hw_max = HWP_HIGHEST_PERF(cap);
                range = hw_max - hw_min;
 
                max_perf_pct = perf_limits->max_perf_pct;
@@ -889,11 +892,6 @@ static void intel_pstate_hwp_set(struct cpufreq_policy *policy)
 
                adj_range = max_perf_pct * range / 100;
                max = hw_min + adj_range;
-               if (limits->no_turbo) {
-                       hw_max = HWP_GUARANTEED_PERF(cap);
-                       if (hw_max < max)
-                               max = hw_max;
-               }
 
                value &= ~HWP_MAX_PERF(~0L);
                value |= HWP_MAX_PERF(max);