cpufreq/amd-pstate: Update asym_prefer_cpu when core rankings change

A subset of AMD systems supporting Preferred Core rankings can have
their rankings changed dynamically at runtime. Update the
"sg->asym_prefer_cpu" across the local hierarchy of CPU when the
preferred core ranking changes.

Signed-off-by: K Prateek Nayak <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Acked-by: Mario Limonciello <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: kudureranganath

drivers/cpufreq/amd-pstate.c

@@ -844,8 +844,10 @@ static void amd_pstate_update_limits(unsigned int cpu)
 	if (highest_perf_changed) {
 		WRITE_ONCE(cpudata->prefcore_ranking, cur_high);
 
-		if (cur_high < CPPC_MAX_PERF)
+		if (cur_high < CPPC_MAX_PERF) {
 			sched_set_itmt_core_prio((int)cur_high, cpu);
+			sched_update_asym_prefer_cpu(cpu, prev_high, cur_high);
+		}
 	}
 }