Merge back earlier cpufreq material for v6.2.

drivers/cpufreq/acpi-cpufreq.c

@@ -19,6 +19,7 @@
 #include <linux/compiler.h>
 #include <linux/dmi.h>
 #include <linux/slab.h>
+#include <linux/string_helpers.h>
 
 #include <linux/acpi.h>
 #include <linux/io.h>
@@ -135,8 +136,8 @@ static int set_boost(struct cpufreq_policy *policy, int val)
 {
 	on_each_cpu_mask(policy->cpus, boost_set_msr_each,
 			 (void *)(long)val, 1);
-	pr_debug("CPU %*pbl: Core Boosting %sabled.\n",
+	pr_debug("CPU %*pbl: Core Boosting %s.\n",
-		 cpumask_pr_args(policy->cpus), val ? "en" : "dis");
+		 cpumask_pr_args(policy->cpus), str_enabled_disabled(val));
 
 	return 0;
 }
@@ -535,15 +536,6 @@ static void free_acpi_perf_data(void)
 	free_percpu(acpi_perf_data);
 }
 
-static int cpufreq_boost_online(unsigned int cpu)
-{
-	/*
-	 * On the CPU_UP path we simply keep the boost-disable flag
-	 * in sync with the current global state.
-	 */
-	return boost_set_msr(acpi_cpufreq_driver.boost_enabled);
-}
-
 static int cpufreq_boost_down_prep(unsigned int cpu)
 {
 	/*
@@ -897,6 +889,8 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
 	if (perf->states[0].core_frequency * 1000 != freq_table[0].frequency)
 		pr_warn(FW_WARN "P-state 0 is not max freq\n");
 
+	set_boost(policy, acpi_cpufreq_driver.boost_enabled);
+
 	return result;
 
 err_unreg:
@@ -916,6 +910,7 @@ static int acpi_cpufreq_cpu_exit(struct cpufreq_policy *policy)
 
 	pr_debug("%s\n", __func__);
 
+	cpufreq_boost_down_prep(policy->cpu);
 	policy->fast_switch_possible = false;
 	policy->driver_data = NULL;
 	acpi_processor_unregister_performance(data->acpi_perf_cpu);
@@ -958,12 +953,8 @@ static struct cpufreq_driver acpi_cpufreq_driver = {
 	.attr		= acpi_cpufreq_attr,
 };
 
-static enum cpuhp_state acpi_cpufreq_online;
-
 static void __init acpi_cpufreq_boost_init(void)
 {
-	int ret;
-
 	if (!(boot_cpu_has(X86_FEATURE_CPB) || boot_cpu_has(X86_FEATURE_IDA))) {
 		pr_debug("Boost capabilities not present in the processor\n");
 		return;
@@ -971,24 +962,6 @@ static void __init acpi_cpufreq_boost_init(void)
 
 	acpi_cpufreq_driver.set_boost = set_boost;
 	acpi_cpufreq_driver.boost_enabled = boost_state(0);
-
-	/*
-	 * This calls the online callback on all online cpu and forces all
-	 * MSRs to the same value.
-	 */
-	ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "cpufreq/acpi:online",
-				cpufreq_boost_online, cpufreq_boost_down_prep);
-	if (ret < 0) {
-		pr_err("acpi_cpufreq: failed to register hotplug callbacks\n");
-		return;
-	}
-	acpi_cpufreq_online = ret;
-}
-
-static void acpi_cpufreq_boost_exit(void)
-{
-	if (acpi_cpufreq_online > 0)
-		cpuhp_remove_state_nocalls(acpi_cpufreq_online);
 }
 
 static int __init acpi_cpufreq_init(void)
@@ -1032,7 +1005,6 @@ static int __init acpi_cpufreq_init(void)
 	ret = cpufreq_register_driver(&acpi_cpufreq_driver);
 	if (ret) {
 		free_acpi_perf_data();
-		acpi_cpufreq_boost_exit();
 	}
 	return ret;
 }
@@ -1041,8 +1013,6 @@ static void __exit acpi_cpufreq_exit(void)
 {
 	pr_debug("%s\n", __func__);
 
-	acpi_cpufreq_boost_exit();
-
 	cpufreq_unregister_driver(&acpi_cpufreq_driver);
 
 	free_acpi_perf_data();

drivers/cpufreq/intel_pstate.c

@@ -298,6 +298,7 @@ static int hwp_active __read_mostly;
 static int hwp_mode_bdw __read_mostly;
 static bool per_cpu_limits __read_mostly;
 static bool hwp_boost __read_mostly;
+static bool hwp_forced __read_mostly;
 
 static struct cpufreq_driver *intel_pstate_driver __read_mostly;
 
@@ -1679,12 +1680,12 @@ static void intel_pstate_update_epp_defaults(struct cpudata *cpudata)
 		return;
 
 	/*
-	 * If powerup EPP is something other than chipset default 0x80 and
+	 * If the EPP is set by firmware, which means that firmware enabled HWP
-	 * - is more performance oriented than 0x80 (default balance_perf EPP)
+	 * - Is equal or less than 0x80 (default balance_perf EPP)
 	 * - But less performance oriented than performance EPP
 	 *   then use this as new balance_perf EPP.
 	 */
-	if (cpudata->epp_default < HWP_EPP_BALANCE_PERFORMANCE &&
+	if (hwp_forced && cpudata->epp_default <= HWP_EPP_BALANCE_PERFORMANCE &&
 	    cpudata->epp_default > HWP_EPP_PERFORMANCE) {
 		epp_values[EPP_INDEX_BALANCE_PERFORMANCE] = cpudata->epp_default;
 		return;
@@ -3384,7 +3385,7 @@ static int __init intel_pstate_init(void)
 
 	id = x86_match_cpu(hwp_support_ids);
 	if (id) {
-		bool hwp_forced = intel_pstate_hwp_is_enabled();
+		hwp_forced = intel_pstate_hwp_is_enabled();
 
 		if (hwp_forced)
 			pr_info("HWP enabled by BIOS\n");

drivers/cpufreq/longhaul.c

@@ -407,10 +407,10 @@ static int guess_fsb(int mult)
 {
 	int speed = cpu_khz / 1000;
 	int i;
-	int speeds[] = { 666, 1000, 1333, 2000 };
+	static const int speeds[] = { 666, 1000, 1333, 2000 };
 	int f_max, f_min;
 
-	for (i = 0; i < 4; i++) {
+	for (i = 0; i < ARRAY_SIZE(speeds); i++) {
 		f_max = ((speeds[i] * mult) + 50) / 100;
 		f_max += (ROUNDING / 2);
 		f_min = f_max - ROUNDING;

drivers/cpufreq/spear-cpufreq.c

@@ -39,7 +39,7 @@ static struct clk *spear1340_cpu_get_possible_parent(unsigned long newfreq)
 	 * In SPEAr1340, cpu clk's parent sys clk can take input from
 	 * following sources
 	 */
-	const char *sys_clk_src[] = {
+	static const char * const sys_clk_src[] = {
 		"sys_syn_clk",
 		"pll1_clk",
 		"pll2_clk",