Merge tag 'amd-pstate-v6.12-2024-10-16' of...

Merge tag 'amd-pstate-v6.12-2024-10-16' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/superm1/linux

Merge an amd-pstate driver fix for 6.12-rc4 from Mario Limonciello:

"Fix a regression introduced where boost control malfunctioned in
 amd-pstate"

* tag 'amd-pstate-v6.12-2024-10-16' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/superm1/linux:
  cpufreq/amd-pstate: Use nominal perf for limits when boost is disabled

drivers/cpufreq/amd-pstate.c

@@ -536,11 +536,16 @@ static int amd_pstate_verify(struct cpufreq_policy_data *policy)
 
 static int amd_pstate_update_min_max_limit(struct cpufreq_policy *policy)
 {
-	u32 max_limit_perf, min_limit_perf, lowest_perf;
+	u32 max_limit_perf, min_limit_perf, lowest_perf, max_perf;
 	struct amd_cpudata *cpudata = policy->driver_data;
 
-	max_limit_perf = div_u64(policy->max * cpudata->highest_perf, cpudata->max_freq);
-	min_limit_perf = div_u64(policy->min * cpudata->highest_perf, cpudata->max_freq);
+	if (cpudata->boost_supported && !policy->boost_enabled)
+		max_perf = READ_ONCE(cpudata->nominal_perf);
+	else
+		max_perf = READ_ONCE(cpudata->highest_perf);
+
+	max_limit_perf = div_u64(policy->max * max_perf, policy->cpuinfo.max_freq);
+	min_limit_perf = div_u64(policy->min * max_perf, policy->cpuinfo.max_freq);
 
 	lowest_perf = READ_ONCE(cpudata->lowest_perf);
 	if (min_limit_perf < lowest_perf)
@@ -1506,10 +1511,13 @@ static int amd_pstate_epp_update_limit(struct cpufreq_policy *policy)
 	u64 value;
 	s16 epp;
 
+	if (cpudata->boost_supported && !policy->boost_enabled)
+		max_perf = READ_ONCE(cpudata->nominal_perf);
+	else
 		max_perf = READ_ONCE(cpudata->highest_perf);
 	min_perf = READ_ONCE(cpudata->lowest_perf);
-	max_limit_perf = div_u64(policy->max * cpudata->highest_perf, cpudata->max_freq);
-	min_limit_perf = div_u64(policy->min * cpudata->highest_perf, cpudata->max_freq);
+	max_limit_perf = div_u64(policy->max * max_perf, policy->cpuinfo.max_freq);
+	min_limit_perf = div_u64(policy->min * max_perf, policy->cpuinfo.max_freq);
 
 	if (min_limit_perf < min_perf)
 		min_limit_perf = min_perf;