1 files changed, 16 insertions, 3 deletions

diff --git a/drivers/cpufreq/cppc_cpufreq.c b/drivers/cpufreq/cppc_cpufreq.c
index e82bb3c30b92..10be285c9055 100644
--- a/drivers/cpufreq/cppc_cpufreq.c
+++ b/drivers/cpufreq/cppc_cpufreq.c
@@ -144,10 +144,23 @@ static int cppc_cpufreq_cpu_init(struct cpufreq_policy *policy)
 
         cppc_dmi_max_khz = cppc_get_dmi_max_khz();
 
-        policy->min = cpu->perf_caps.lowest_perf * cppc_dmi_max_khz / cpu->perf_caps.highest_perf;
+        /*
+         * Set min to lowest nonlinear perf to avoid any efficiency penalty (see
+         * Section 8.4.7.1.1.5 of ACPI 6.1 spec)
+         */
+        policy->min = cpu->perf_caps.lowest_nonlinear_perf * cppc_dmi_max_khz /
+                cpu->perf_caps.highest_perf;
         policy->max = cppc_dmi_max_khz;
-        policy->cpuinfo.min_freq = policy->min;
-        policy->cpuinfo.max_freq = policy->max;
+
+        /*
+         * Set cpuinfo.min_freq to Lowest to make the full range of performance
+         * available if userspace wants to use any perf between lowest & lowest
+         * nonlinear perf
+         */
+        policy->cpuinfo.min_freq = cpu->perf_caps.lowest_perf * cppc_dmi_max_khz /
+                cpu->perf_caps.highest_perf;
+        policy->cpuinfo.max_freq = cppc_dmi_max_khz;
+
         policy->cpuinfo.transition_latency = cppc_get_transition_latency(cpu_num);
         policy->shared_type = cpu->shared_type;