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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2019-04-08 13:47:41 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2019-04-08 13:47:41 +0300
commite75135e601ee9084953e21a452053d6a21a72db8 (patch)
treef809566ae73bf93b3e85db4f8831b32d4323ed17 /drivers/cpufreq
parent4ab526468344c11d2d1807ae95feb1f5305dc014 (diff)
parent108ec36b699475001f5af81ff7db624427d14dbe (diff)
downloadlinux-e75135e601ee9084953e21a452053d6a21a72db8.tar.xz
Merge back cpufreq material for v5.2.
Diffstat (limited to 'drivers/cpufreq')
-rw-r--r--drivers/cpufreq/amd_freq_sensitivity.c2
-rw-r--r--drivers/cpufreq/cpufreq.c84
-rw-r--r--drivers/cpufreq/intel_pstate.c65
-rw-r--r--drivers/cpufreq/powernow-k8.c2
4 files changed, 123 insertions, 30 deletions
diff --git a/drivers/cpufreq/amd_freq_sensitivity.c b/drivers/cpufreq/amd_freq_sensitivity.c
index 4ac7c3cf34be..6927a8c0e748 100644
--- a/drivers/cpufreq/amd_freq_sensitivity.c
+++ b/drivers/cpufreq/amd_freq_sensitivity.c
@@ -124,7 +124,7 @@ static int __init amd_freq_sensitivity_init(void)
PCI_DEVICE_ID_AMD_KERNCZ_SMBUS, NULL);
if (!pcidev) {
- if (!static_cpu_has(X86_FEATURE_PROC_FEEDBACK))
+ if (!boot_cpu_has(X86_FEATURE_PROC_FEEDBACK))
return -ENODEV;
}
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index e10922709d13..f3f79266ab48 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -34,11 +34,6 @@
static LIST_HEAD(cpufreq_policy_list);
-static inline bool policy_is_inactive(struct cpufreq_policy *policy)
-{
- return cpumask_empty(policy->cpus);
-}
-
/* Macros to iterate over CPU policies */
#define for_each_suitable_policy(__policy, __active) \
list_for_each_entry(__policy, &cpufreq_policy_list, policy_list) \
@@ -250,6 +245,51 @@ void cpufreq_cpu_put(struct cpufreq_policy *policy)
}
EXPORT_SYMBOL_GPL(cpufreq_cpu_put);
+/**
+ * cpufreq_cpu_release - Unlock a policy and decrement its usage counter.
+ * @policy: cpufreq policy returned by cpufreq_cpu_acquire().
+ */
+void cpufreq_cpu_release(struct cpufreq_policy *policy)
+{
+ if (WARN_ON(!policy))
+ return;
+
+ lockdep_assert_held(&policy->rwsem);
+
+ up_write(&policy->rwsem);
+
+ cpufreq_cpu_put(policy);
+}
+
+/**
+ * cpufreq_cpu_acquire - Find policy for a CPU, mark it as busy and lock it.
+ * @cpu: CPU to find the policy for.
+ *
+ * Call cpufreq_cpu_get() to get a reference on the cpufreq policy for @cpu and
+ * if the policy returned by it is not NULL, acquire its rwsem for writing.
+ * Return the policy if it is active or release it and return NULL otherwise.
+ *
+ * The policy returned by this function has to be released with the help of
+ * cpufreq_cpu_release() in order to release its rwsem and balance its usage
+ * counter properly.
+ */
+struct cpufreq_policy *cpufreq_cpu_acquire(unsigned int cpu)
+{
+ struct cpufreq_policy *policy = cpufreq_cpu_get(cpu);
+
+ if (!policy)
+ return NULL;
+
+ down_write(&policy->rwsem);
+
+ if (policy_is_inactive(policy)) {
+ cpufreq_cpu_release(policy);
+ return NULL;
+ }
+
+ return policy;
+}
+
/*********************************************************************
* EXTERNALLY AFFECTING FREQUENCY CHANGES *
*********************************************************************/
@@ -669,9 +709,6 @@ static ssize_t show_scaling_cur_freq(struct cpufreq_policy *policy, char *buf)
return ret;
}
-static int cpufreq_set_policy(struct cpufreq_policy *policy,
- struct cpufreq_policy *new_policy);
-
/**
* cpufreq_per_cpu_attr_write() / store_##file_name() - sysfs write access
*/
@@ -2229,8 +2266,8 @@ EXPORT_SYMBOL(cpufreq_get_policy);
*
* The cpuinfo part of @policy is not updated by this function.
*/
-static int cpufreq_set_policy(struct cpufreq_policy *policy,
- struct cpufreq_policy *new_policy)
+int cpufreq_set_policy(struct cpufreq_policy *policy,
+ struct cpufreq_policy *new_policy)
{
struct cpufreq_governor *old_gov;
int ret;
@@ -2337,17 +2374,12 @@ static int cpufreq_set_policy(struct cpufreq_policy *policy,
*/
void cpufreq_update_policy(unsigned int cpu)
{
- struct cpufreq_policy *policy = cpufreq_cpu_get(cpu);
+ struct cpufreq_policy *policy = cpufreq_cpu_acquire(cpu);
struct cpufreq_policy new_policy;
if (!policy)
return;
- down_write(&policy->rwsem);
-
- if (policy_is_inactive(policy))
- goto unlock;
-
/*
* BIOS might change freq behind our back
* -> ask driver for current freq and notify governors about a change
@@ -2364,12 +2396,26 @@ void cpufreq_update_policy(unsigned int cpu)
cpufreq_set_policy(policy, &new_policy);
unlock:
- up_write(&policy->rwsem);
-
- cpufreq_cpu_put(policy);
+ cpufreq_cpu_release(policy);
}
EXPORT_SYMBOL(cpufreq_update_policy);
+/**
+ * cpufreq_update_limits - Update policy limits for a given CPU.
+ * @cpu: CPU to update the policy limits for.
+ *
+ * Invoke the driver's ->update_limits callback if present or call
+ * cpufreq_update_policy() for @cpu.
+ */
+void cpufreq_update_limits(unsigned int cpu)
+{
+ if (cpufreq_driver->update_limits)
+ cpufreq_driver->update_limits(cpu);
+ else
+ cpufreq_update_policy(cpu);
+}
+EXPORT_SYMBOL_GPL(cpufreq_update_limits);
+
/*********************************************************************
* BOOST *
*********************************************************************/
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index 2986119dd31f..34b54df41aaa 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -179,6 +179,7 @@ struct vid_data {
* based on the MSR_IA32_MISC_ENABLE value and whether or
* not the maximum reported turbo P-state is different from
* the maximum reported non-turbo one.
+ * @turbo_disabled_mf: The @turbo_disabled value reflected by cpuinfo.max_freq.
* @min_perf_pct: Minimum capacity limit in percent of the maximum turbo
* P-state capacity.
* @max_perf_pct: Maximum capacity limit in percent of the maximum turbo
@@ -187,6 +188,7 @@ struct vid_data {
struct global_params {
bool no_turbo;
bool turbo_disabled;
+ bool turbo_disabled_mf;
int max_perf_pct;
int min_perf_pct;
};
@@ -525,7 +527,7 @@ static s16 intel_pstate_get_epb(struct cpudata *cpu_data)
u64 epb;
int ret;
- if (!static_cpu_has(X86_FEATURE_EPB))
+ if (!boot_cpu_has(X86_FEATURE_EPB))
return -ENXIO;
ret = rdmsrl_on_cpu(cpu_data->cpu, MSR_IA32_ENERGY_PERF_BIAS, &epb);
@@ -539,7 +541,7 @@ static s16 intel_pstate_get_epp(struct cpudata *cpu_data, u64 hwp_req_data)
{
s16 epp;
- if (static_cpu_has(X86_FEATURE_HWP_EPP)) {
+ if (boot_cpu_has(X86_FEATURE_HWP_EPP)) {
/*
* When hwp_req_data is 0, means that caller didn't read
* MSR_HWP_REQUEST, so need to read and get EPP.
@@ -564,7 +566,7 @@ static int intel_pstate_set_epb(int cpu, s16 pref)
u64 epb;
int ret;
- if (!static_cpu_has(X86_FEATURE_EPB))
+ if (!boot_cpu_has(X86_FEATURE_EPB))
return -ENXIO;
ret = rdmsrl_on_cpu(cpu, MSR_IA32_ENERGY_PERF_BIAS, &epb);
@@ -612,7 +614,7 @@ static int intel_pstate_get_energy_pref_index(struct cpudata *cpu_data)
if (epp < 0)
return epp;
- if (static_cpu_has(X86_FEATURE_HWP_EPP)) {
+ if (boot_cpu_has(X86_FEATURE_HWP_EPP)) {
if (epp == HWP_EPP_PERFORMANCE)
return 1;
if (epp <= HWP_EPP_BALANCE_PERFORMANCE)
@@ -621,7 +623,7 @@ static int intel_pstate_get_energy_pref_index(struct cpudata *cpu_data)
return 3;
else
return 4;
- } else if (static_cpu_has(X86_FEATURE_EPB)) {
+ } else if (boot_cpu_has(X86_FEATURE_EPB)) {
/*
* Range:
* 0x00-0x03 : Performance
@@ -649,7 +651,7 @@ static int intel_pstate_set_energy_pref_index(struct cpudata *cpu_data,
mutex_lock(&intel_pstate_limits_lock);
- if (static_cpu_has(X86_FEATURE_HWP_EPP)) {
+ if (boot_cpu_has(X86_FEATURE_HWP_EPP)) {
u64 value;
ret = rdmsrl_on_cpu(cpu_data->cpu, MSR_HWP_REQUEST, &value);
@@ -824,7 +826,7 @@ static void intel_pstate_hwp_set(unsigned int cpu)
epp = cpu_data->epp_powersave;
}
update_epp:
- if (static_cpu_has(X86_FEATURE_HWP_EPP)) {
+ if (boot_cpu_has(X86_FEATURE_HWP_EPP)) {
value &= ~GENMASK_ULL(31, 24);
value |= (u64)epp << 24;
} else {
@@ -849,7 +851,7 @@ static void intel_pstate_hwp_force_min_perf(int cpu)
value |= HWP_MIN_PERF(min_perf);
/* Set EPP/EPB to min */
- if (static_cpu_has(X86_FEATURE_HWP_EPP))
+ if (boot_cpu_has(X86_FEATURE_HWP_EPP))
value |= HWP_ENERGY_PERF_PREFERENCE(HWP_EPP_POWERSAVE);
else
intel_pstate_set_epb(cpu, HWP_EPP_BALANCE_POWERSAVE);
@@ -897,6 +899,48 @@ static void intel_pstate_update_policies(void)
cpufreq_update_policy(cpu);
}
+static void intel_pstate_update_max_freq(unsigned int cpu)
+{
+ struct cpufreq_policy *policy = cpufreq_cpu_acquire(cpu);
+ struct cpufreq_policy new_policy;
+ struct cpudata *cpudata;
+
+ if (!policy)
+ return;
+
+ cpudata = all_cpu_data[cpu];
+ policy->cpuinfo.max_freq = global.turbo_disabled_mf ?
+ cpudata->pstate.max_freq : cpudata->pstate.turbo_freq;
+
+ memcpy(&new_policy, policy, sizeof(*policy));
+ new_policy.max = min(policy->user_policy.max, policy->cpuinfo.max_freq);
+ new_policy.min = min(policy->user_policy.min, new_policy.max);
+
+ cpufreq_set_policy(policy, &new_policy);
+
+ cpufreq_cpu_release(policy);
+}
+
+static void intel_pstate_update_limits(unsigned int cpu)
+{
+ mutex_lock(&intel_pstate_driver_lock);
+
+ update_turbo_state();
+ /*
+ * If turbo has been turned on or off globally, policy limits for
+ * all CPUs need to be updated to reflect that.
+ */
+ if (global.turbo_disabled_mf != global.turbo_disabled) {
+ global.turbo_disabled_mf = global.turbo_disabled;
+ for_each_possible_cpu(cpu)
+ intel_pstate_update_max_freq(cpu);
+ } else {
+ cpufreq_update_policy(cpu);
+ }
+
+ mutex_unlock(&intel_pstate_driver_lock);
+}
+
/************************** sysfs begin ************************/
#define show_one(file_name, object) \
static ssize_t show_##file_name \
@@ -1197,7 +1241,7 @@ static void __init intel_pstate_sysfs_expose_params(void)
static void intel_pstate_hwp_enable(struct cpudata *cpudata)
{
/* First disable HWP notification interrupt as we don't process them */
- if (static_cpu_has(X86_FEATURE_HWP_NOTIFY))
+ if (boot_cpu_has(X86_FEATURE_HWP_NOTIFY))
wrmsrl_on_cpu(cpudata->cpu, MSR_HWP_INTERRUPT, 0x00);
wrmsrl_on_cpu(cpudata->cpu, MSR_PM_ENABLE, 0x1);
@@ -2138,6 +2182,7 @@ static int __intel_pstate_cpu_init(struct cpufreq_policy *policy)
/* cpuinfo and default policy values */
policy->cpuinfo.min_freq = cpu->pstate.min_pstate * cpu->pstate.scaling;
update_turbo_state();
+ global.turbo_disabled_mf = global.turbo_disabled;
policy->cpuinfo.max_freq = global.turbo_disabled ?
cpu->pstate.max_pstate : cpu->pstate.turbo_pstate;
policy->cpuinfo.max_freq *= cpu->pstate.scaling;
@@ -2182,6 +2227,7 @@ static struct cpufreq_driver intel_pstate = {
.init = intel_pstate_cpu_init,
.exit = intel_pstate_cpu_exit,
.stop_cpu = intel_pstate_stop_cpu,
+ .update_limits = intel_pstate_update_limits,
.name = "intel_pstate",
};
@@ -2316,6 +2362,7 @@ static struct cpufreq_driver intel_cpufreq = {
.init = intel_cpufreq_cpu_init,
.exit = intel_pstate_cpu_exit,
.stop_cpu = intel_cpufreq_stop_cpu,
+ .update_limits = intel_pstate_update_limits,
.name = "intel_cpufreq",
};
diff --git a/drivers/cpufreq/powernow-k8.c b/drivers/cpufreq/powernow-k8.c
index fb77b39a4ce3..3c12e03fa343 100644
--- a/drivers/cpufreq/powernow-k8.c
+++ b/drivers/cpufreq/powernow-k8.c
@@ -1178,7 +1178,7 @@ static int powernowk8_init(void)
unsigned int i, supported_cpus = 0;
int ret;
- if (static_cpu_has(X86_FEATURE_HW_PSTATE)) {
+ if (boot_cpu_has(X86_FEATURE_HW_PSTATE)) {
__request_acpi_cpufreq();
return -ENODEV;
}