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authorSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>2017-01-18 21:48:24 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2017-02-04 02:05:32 +0300
commit4e5d3f713b619e404618fc280ce861e473605f85 (patch)
tree8bf13d6d6fa0436449d534999498222695ce7f16 /drivers/cpufreq
parent7d9a8a9f4ee682e299fa2acee48031713aef1b76 (diff)
downloadlinux-4e5d3f713b619e404618fc280ce861e473605f85.tar.xz
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>
Diffstat (limited to 'drivers/cpufreq')
-rw-r--r--drivers/cpufreq/intel_pstate.c10
1 files changed, 4 insertions, 6 deletions
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index 735e3e8ee91d..95482099aa96 100644
--- 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);