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Code

Merge back earlier cpufreq material for v4.3.

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This commit is contained in:
Rafael J. Wysocki 2015-07-28 17:21:32 +02:00
commit c6e53c69ef
15 changed files with 341 additions and 272 deletions
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4
drivers/acpi/processor_perflib.c
View File

@ -784,9 +784,7 @@ acpi_processor_register_performance(struct acpi_processor_performance
EXPORT_SYMBOL(acpi_processor_register_performance);
void
acpi_processor_unregister_performance(struct acpi_processor_performance
*performance, unsigned int cpu)
void acpi_processor_unregister_performance(unsigned int cpu)
{
struct acpi_processor *pr;

93
drivers/cpufreq/acpi-cpufreq.c
View File

@ -65,18 +65,21 @@ enum {
#define MSR_K7_HWCR_CPB_DIS (1ULL << 25)
struct acpi_cpufreq_data {
struct acpi_processor_performance *acpi_data;
struct cpufreq_frequency_table *freq_table;
unsigned int resume;
unsigned int cpu_feature;
unsigned int acpi_perf_cpu;
cpumask_var_t freqdomain_cpus;
};
static DEFINE_PER_CPU(struct acpi_cpufreq_data *, acfreq_data);
/* acpi_perf_data is a pointer to percpu data. */
static struct acpi_processor_performance __percpu *acpi_perf_data;
static inline struct acpi_processor_performance *to_perf_data(struct acpi_cpufreq_data *data)
{
return per_cpu_ptr(acpi_perf_data, data->acpi_perf_cpu);
}
static struct cpufreq_driver acpi_cpufreq_driver;
static unsigned int acpi_pstate_strict;
@ -144,7 +147,7 @@ static int _store_boost(int val)
static ssize_t show_freqdomain_cpus(struct cpufreq_policy *policy, char *buf)
{
struct acpi_cpufreq_data *data = per_cpu(acfreq_data, policy->cpu);
struct acpi_cpufreq_data *data = policy->driver_data;
return cpufreq_show_cpus(data->freqdomain_cpus, buf);
}
@ -202,7 +205,7 @@ static unsigned extract_io(u32 value, struct acpi_cpufreq_data *data)
struct acpi_processor_performance *perf;
int i;
perf = data->acpi_data;
perf = to_perf_data(data);
for (i = 0; i < perf->state_count; i++) {
if (value == perf->states[i].status)
@ -221,7 +224,7 @@ static unsigned extract_msr(u32 msr, struct acpi_cpufreq_data *data)
else
msr &= INTEL_MSR_RANGE;
perf = data->acpi_data;
perf = to_perf_data(data);
cpufreq_for_each_entry(pos, data->freq_table)
if (msr == perf->states[pos->driver_data].status)
@ -327,7 +330,8 @@ static void drv_write(struct drv_cmd *cmd)
put_cpu();
}
static u32 get_cur_val(const struct cpumask *mask)
static u32
get_cur_val(const struct cpumask *mask, struct acpi_cpufreq_data *data)
{
struct acpi_processor_performance *perf;
struct drv_cmd cmd;
@ -335,7 +339,7 @@ static u32 get_cur_val(const struct cpumask *mask)
if (unlikely(cpumask_empty(mask)))
return 0;
switch (per_cpu(acfreq_data, cpumask_first(mask))->cpu_feature) {
switch (data->cpu_feature) {
case SYSTEM_INTEL_MSR_CAPABLE:
cmd.type = SYSTEM_INTEL_MSR_CAPABLE;
cmd.addr.msr.reg = MSR_IA32_PERF_CTL;
@ -346,7 +350,7 @@ static u32 get_cur_val(const struct cpumask *mask)
break;
case SYSTEM_IO_CAPABLE:
cmd.type = SYSTEM_IO_CAPABLE;
perf = per_cpu(acfreq_data, cpumask_first(mask))->acpi_data;
perf = to_perf_data(data);
cmd.addr.io.port = perf->control_register.address;
cmd.addr.io.bit_width = perf->control_register.bit_width;
break;
@ -364,19 +368,24 @@ static u32 get_cur_val(const struct cpumask *mask)
static unsigned int get_cur_freq_on_cpu(unsigned int cpu)
{
struct acpi_cpufreq_data *data = per_cpu(acfreq_data, cpu);
struct acpi_cpufreq_data *data;
struct cpufreq_policy *policy;
unsigned int freq;
unsigned int cached_freq;
pr_debug("get_cur_freq_on_cpu (%d)\n", cpu);
if (unlikely(data == NULL ||
data->acpi_data == NULL || data->freq_table == NULL)) {
policy = cpufreq_cpu_get(cpu);
if (unlikely(!policy))
return 0;
}
cached_freq = data->freq_table[data->acpi_data->state].frequency;
freq = extract_freq(get_cur_val(cpumask_of(cpu)), data);
data = policy->driver_data;
cpufreq_cpu_put(policy);
if (unlikely(!data || !data->freq_table))
return 0;
cached_freq = data->freq_table[to_perf_data(data)->state].frequency;
freq = extract_freq(get_cur_val(cpumask_of(cpu), data), data);
if (freq != cached_freq) {
/*
* The dreaded BIOS frequency change behind our back.
@ -397,7 +406,7 @@ static unsigned int check_freqs(const struct cpumask *mask, unsigned int freq,
unsigned int i;
for (i = 0; i < 100; i++) {
cur_freq = extract_freq(get_cur_val(mask), data);
cur_freq = extract_freq(get_cur_val(mask, data), data);
if (cur_freq == freq)
return 1;
udelay(10);
@ -408,18 +417,17 @@ static unsigned int check_freqs(const struct cpumask *mask, unsigned int freq,
static int acpi_cpufreq_target(struct cpufreq_policy *policy,
unsigned int index)
{
struct acpi_cpufreq_data *data = per_cpu(acfreq_data, policy->cpu);
struct acpi_cpufreq_data *data = policy->driver_data;
struct acpi_processor_performance *perf;
struct drv_cmd cmd;
unsigned int next_perf_state = 0; /* Index into perf table */
int result = 0;
if (unlikely(data == NULL ||
data->acpi_data == NULL || data->freq_table == NULL)) {
if (unlikely(data == NULL || data->freq_table == NULL)) {
return -ENODEV;
}
perf = data->acpi_data;
perf = to_perf_data(data);
next_perf_state = data->freq_table[index].driver_data;
if (perf->state == next_perf_state) {
if (unlikely(data->resume)) {
@ -482,8 +490,9 @@ out:
static unsigned long
acpi_cpufreq_guess_freq(struct acpi_cpufreq_data *data, unsigned int cpu)
{
struct acpi_processor_performance *perf = data->acpi_data;
struct acpi_processor_performance *perf;
perf = to_perf_data(data);
if (cpu_khz) {
/* search the closest match to cpu_khz */
unsigned int i;
@ -672,17 +681,17 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
goto err_free;
}
data->acpi_data = per_cpu_ptr(acpi_perf_data, cpu);
per_cpu(acfreq_data, cpu) = data;
perf = per_cpu_ptr(acpi_perf_data, cpu);
data->acpi_perf_cpu = cpu;
policy->driver_data = data;
if (cpu_has(c, X86_FEATURE_CONSTANT_TSC))
acpi_cpufreq_driver.flags |= CPUFREQ_CONST_LOOPS;
result = acpi_processor_register_performance(data->acpi_data, cpu);
result = acpi_processor_register_performance(perf, cpu);
if (result)
goto err_free_mask;
perf = data->acpi_data;
policy->shared_type = perf->shared_type;
/*
@ -838,26 +847,25 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
err_freqfree:
kfree(data->freq_table);
err_unreg:
acpi_processor_unregister_performance(perf, cpu);
acpi_processor_unregister_performance(cpu);
err_free_mask:
free_cpumask_var(data->freqdomain_cpus);
err_free:
kfree(data);
per_cpu(acfreq_data, cpu) = NULL;
policy->driver_data = NULL;
return result;
}
static int acpi_cpufreq_cpu_exit(struct cpufreq_policy *policy)
{
struct acpi_cpufreq_data *data = per_cpu(acfreq_data, policy->cpu);
struct acpi_cpufreq_data *data = policy->driver_data;
pr_debug("acpi_cpufreq_cpu_exit\n");
if (data) {
per_cpu(acfreq_data, policy->cpu) = NULL;
acpi_processor_unregister_performance(data->acpi_data,
policy->cpu);
policy->driver_data = NULL;
acpi_processor_unregister_performance(data->acpi_perf_cpu);
free_cpumask_var(data->freqdomain_cpus);
kfree(data->freq_table);
kfree(data);
@ -868,7 +876,7 @@ static int acpi_cpufreq_cpu_exit(struct cpufreq_policy *policy)
static int acpi_cpufreq_resume(struct cpufreq_policy *policy)
{
struct acpi_cpufreq_data *data = per_cpu(acfreq_data, policy->cpu);
struct acpi_cpufreq_data *data = policy->driver_data;
pr_debug("acpi_cpufreq_resume\n");
@ -880,7 +888,9 @@ static int acpi_cpufreq_resume(struct cpufreq_policy *policy)
static struct freq_attr *acpi_cpufreq_attr[] = {
&cpufreq_freq_attr_scaling_available_freqs,
&freqdomain_cpus,
NULL, /* this is a placeholder for cpb, do not remove */
#ifdef CONFIG_X86_ACPI_CPUFREQ_CPB
&cpb,
#endif
NULL,
};
@ -953,17 +963,16 @@ static int __init acpi_cpufreq_init(void)
* only if configured. This is considered legacy code, which
* will probably be removed at some point in the future.
*/
if (check_amd_hwpstate_cpu(0)) {
struct freq_attr **iter;
if (!check_amd_hwpstate_cpu(0)) {
struct freq_attr **attr;
pr_debug("adding sysfs entry for cpb\n");
pr_debug("CPB unsupported, do not expose it\n");
for (iter = acpi_cpufreq_attr; *iter != NULL; iter++)
;
/* make sure there is a terminator behind it */
if (iter[1] == NULL)
*iter = &cpb;
for (attr = acpi_cpufreq_attr; *attr; attr++)
if (*attr == &cpb) {
*attr = NULL;
break;
}
}
#endif
acpi_cpufreq_boost_init();

107
drivers/cpufreq/cpufreq.c
View File

@ -112,12 +112,6 @@ static inline bool has_target(void)
return cpufreq_driver->target_index || cpufreq_driver->target;
}
/*
* rwsem to guarantee that cpufreq driver module doesn't unload during critical
* sections
*/
static DECLARE_RWSEM(cpufreq_rwsem);
/* internal prototypes */
static int __cpufreq_governor(struct cpufreq_policy *policy,
unsigned int event);
@ -277,10 +271,6 @@ EXPORT_SYMBOL_GPL(cpufreq_generic_get);
* If corresponding call cpufreq_cpu_put() isn't made, the policy wouldn't be
* freed as that depends on the kobj count.
*
* It also takes a read-lock of 'cpufreq_rwsem' and doesn't put it back if a
* valid policy is found. This is done to make sure the driver doesn't get
* unregistered while the policy is being used.
*
* Return: A valid policy on success, otherwise NULL on failure.
*/
struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu)
@ -291,9 +281,6 @@ struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu)
if (WARN_ON(cpu >= nr_cpu_ids))
return NULL;
if (!down_read_trylock(&cpufreq_rwsem))
return NULL;
/* get the cpufreq driver */
read_lock_irqsave(&cpufreq_driver_lock, flags);
@ -306,9 +293,6 @@ struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu)
read_unlock_irqrestore(&cpufreq_driver_lock, flags);
if (!policy)
up_read(&cpufreq_rwsem);
return policy;
}
EXPORT_SYMBOL_GPL(cpufreq_cpu_get);
@ -320,13 +304,10 @@ EXPORT_SYMBOL_GPL(cpufreq_cpu_get);
*
* This decrements the kobject reference count incremented earlier by calling
* cpufreq_cpu_get().
*
* It also drops the read-lock of 'cpufreq_rwsem' taken at cpufreq_cpu_get().
*/
void cpufreq_cpu_put(struct cpufreq_policy *policy)
{
kobject_put(&policy->kobj);
up_read(&cpufreq_rwsem);
}
EXPORT_SYMBOL_GPL(cpufreq_cpu_put);
@ -851,9 +832,6 @@ static ssize_t show(struct kobject *kobj, struct attribute *attr, char *buf)
struct freq_attr *fattr = to_attr(attr);
ssize_t ret;
if (!down_read_trylock(&cpufreq_rwsem))
return -EINVAL;
down_read(&policy->rwsem);
if (fattr->show)
@ -862,7 +840,6 @@ static ssize_t show(struct kobject *kobj, struct attribute *attr, char *buf)
ret = -EIO;
up_read(&policy->rwsem);
up_read(&cpufreq_rwsem);
return ret;
}
@ -879,9 +856,6 @@ static ssize_t store(struct kobject *kobj, struct attribute *attr,
if (!cpu_online(policy->cpu))
goto unlock;
if (!down_read_trylock(&cpufreq_rwsem))
goto unlock;
down_write(&policy->rwsem);
/* Updating inactive policies is invalid, so avoid doing that. */
@ -897,8 +871,6 @@ static ssize_t store(struct kobject *kobj, struct attribute *attr,
unlock_policy_rwsem:
up_write(&policy->rwsem);
up_read(&cpufreq_rwsem);
unlock:
put_online_cpus();
@ -1060,11 +1032,10 @@ static int cpufreq_add_dev_interface(struct cpufreq_policy *policy,
return cpufreq_add_dev_symlink(policy);
}
static void cpufreq_init_policy(struct cpufreq_policy *policy)
static int cpufreq_init_policy(struct cpufreq_policy *policy)
{
struct cpufreq_governor *gov = NULL;
struct cpufreq_policy new_policy;
int ret = 0;
memcpy(&new_policy, policy, sizeof(*policy));
@ -1083,12 +1054,7 @@ static void cpufreq_init_policy(struct cpufreq_policy *policy)
cpufreq_parse_governor(gov->name, &new_policy.policy, NULL);
/* set default policy */
ret = cpufreq_set_policy(policy, &new_policy);
if (ret) {
pr_debug("setting policy failed\n");
if (cpufreq_driver->exit)
cpufreq_driver->exit(policy);
}
return cpufreq_set_policy(policy, &new_policy);
}
static int cpufreq_add_policy_cpu(struct cpufreq_policy *policy,
@ -1276,15 +1242,11 @@ static int cpufreq_add_dev(struct device *dev, struct subsys_interface *sif)
? add_cpu_dev_symlink(policy, cpu) : 0;
}
if (!down_read_trylock(&cpufreq_rwsem))
return 0;
/* Check if this CPU already has a policy to manage it */
policy = per_cpu(cpufreq_cpu_data, cpu);
if (policy && !policy_is_inactive(policy)) {
WARN_ON(!cpumask_test_cpu(cpu, policy->related_cpus));
ret = cpufreq_add_policy_cpu(policy, cpu, dev);
up_read(&cpufreq_rwsem);
return ret;
}
@ -1297,7 +1259,7 @@ static int cpufreq_add_dev(struct device *dev, struct subsys_interface *sif)
recover_policy = false;
policy = cpufreq_policy_alloc(dev);
if (!policy)
goto nomem_out;
goto out_release_rwsem;
}
cpumask_copy(policy->cpus, cpumask_of(cpu));
@ -1308,7 +1270,7 @@ static int cpufreq_add_dev(struct device *dev, struct subsys_interface *sif)
ret = cpufreq_driver->init(policy);
if (ret) {
pr_debug("initialization failed\n");
goto err_set_policy_cpu;
goto out_free_policy;
}
down_write(&policy->rwsem);
@ -1340,7 +1302,7 @@ static int cpufreq_add_dev(struct device *dev, struct subsys_interface *sif)
policy->cur = cpufreq_driver->get(policy->cpu);
if (!policy->cur) {
pr_err("%s: ->get() failed\n", __func__);
goto err_get_freq;
goto out_exit_policy;
}
}
@ -1390,7 +1352,7 @@ static int cpufreq_add_dev(struct device *dev, struct subsys_interface *sif)
if (!recover_policy) {
ret = cpufreq_add_dev_interface(policy, dev);
if (ret)
goto err_out_unregister;
goto out_exit_policy;
blocking_notifier_call_chain(&cpufreq_policy_notifier_list,
CPUFREQ_CREATE_POLICY, policy);
@ -1399,7 +1361,12 @@ static int cpufreq_add_dev(struct device *dev, struct subsys_interface *sif)
write_unlock_irqrestore(&cpufreq_driver_lock, flags);
}
cpufreq_init_policy(policy);
ret = cpufreq_init_policy(policy);
if (ret) {
pr_err("%s: Failed to initialize policy for cpu: %d (%d)\n",
__func__, cpu, ret);
goto out_remove_policy_notify;
}
if (!recover_policy) {
policy->user_policy.policy = policy->policy;
@ -1409,8 +1376,6 @@ static int cpufreq_add_dev(struct device *dev, struct subsys_interface *sif)
kobject_uevent(&policy->kobj, KOBJ_ADD);
up_read(&cpufreq_rwsem);
/* Callback for handling stuff after policy is ready */
if (cpufreq_driver->ready)
cpufreq_driver->ready(policy);
@ -1419,17 +1384,17 @@ static int cpufreq_add_dev(struct device *dev, struct subsys_interface *sif)
return 0;
err_out_unregister:
err_get_freq:
out_remove_policy_notify:
/* cpufreq_policy_free() will notify based on this */
recover_policy = true;
out_exit_policy:
up_write(&policy->rwsem);
if (cpufreq_driver->exit)
cpufreq_driver->exit(policy);
err_set_policy_cpu:
out_free_policy:
cpufreq_policy_free(policy, recover_policy);
nomem_out:
up_read(&cpufreq_rwsem);
out_release_rwsem:
return ret;
}
@ -2296,16 +2261,31 @@ static int cpufreq_set_policy(struct cpufreq_policy *policy,
old_gov = policy->governor;
/* end old governor */
if (old_gov) {
__cpufreq_governor(policy, CPUFREQ_GOV_STOP);
ret = __cpufreq_governor(policy, CPUFREQ_GOV_STOP);
if (ret) {
/* This can happen due to race with other operations */
pr_debug("%s: Failed to Stop Governor: %s (%d)\n",
__func__, old_gov->name, ret);
return ret;
}
up_write(&policy->rwsem);
__cpufreq_governor(policy, CPUFREQ_GOV_POLICY_EXIT);
ret = __cpufreq_governor(policy, CPUFREQ_GOV_POLICY_EXIT);
down_write(&policy->rwsem);
if (ret) {
pr_err("%s: Failed to Exit Governor: %s (%d)\n",
__func__, old_gov->name, ret);
return ret;
}
}
/* start new governor */
policy->governor = new_policy->governor;
if (!__cpufreq_governor(policy, CPUFREQ_GOV_POLICY_INIT)) {
if (!__cpufreq_governor(policy, CPUFREQ_GOV_START))
ret = __cpufreq_governor(policy, CPUFREQ_GOV_POLICY_INIT);
if (!ret) {
ret = __cpufreq_governor(policy, CPUFREQ_GOV_START);
if (!ret)
goto out;
up_write(&policy->rwsem);
@ -2317,11 +2297,13 @@ static int cpufreq_set_policy(struct cpufreq_policy *policy,
pr_debug("starting governor %s failed\n", policy->governor->name);
if (old_gov) {
policy->governor = old_gov;
__cpufreq_governor(policy, CPUFREQ_GOV_POLICY_INIT);
__cpufreq_governor(policy, CPUFREQ_GOV_START);
if (__cpufreq_governor(policy, CPUFREQ_GOV_POLICY_INIT))
policy->governor = NULL;
else
__cpufreq_governor(policy, CPUFREQ_GOV_START);
}
return -EINVAL;
return ret;
out:
pr_debug("governor: change or update limits\n");
@ -2588,19 +2570,20 @@ int cpufreq_unregister_driver(struct cpufreq_driver *driver)
pr_debug("unregistering driver %s\n", driver->name);
/* Protect against concurrent cpu hotplug */
get_online_cpus();
subsys_interface_unregister(&cpufreq_interface);
if (cpufreq_boost_supported())
cpufreq_sysfs_remove_file(&boost.attr);
unregister_hotcpu_notifier(&cpufreq_cpu_notifier);
down_write(&cpufreq_rwsem);
write_lock_irqsave(&cpufreq_driver_lock, flags);
cpufreq_driver = NULL;
write_unlock_irqrestore(&cpufreq_driver_lock, flags);
up_write(&cpufreq_rwsem);
put_online_cpus();
return 0;
}

25
drivers/cpufreq/cpufreq_conservative.c
View File

@ -47,7 +47,7 @@ static inline unsigned int get_freq_target(struct cs_dbs_tuners *cs_tuners,
static void cs_check_cpu(int cpu, unsigned int load)
{
struct cs_cpu_dbs_info_s *dbs_info = &per_cpu(cs_cpu_dbs_info, cpu);
struct cpufreq_policy *policy = dbs_info->cdbs.cur_policy;
struct cpufreq_policy *policy = dbs_info->cdbs.shared->policy;
struct dbs_data *dbs_data = policy->governor_data;
struct cs_dbs_tuners *cs_tuners = dbs_data->tuners;
@ -102,26 +102,15 @@ static void cs_check_cpu(int cpu, unsigned int load)
}
}
static void cs_dbs_timer(struct work_struct *work)
static unsigned int cs_dbs_timer(struct cpu_dbs_info *cdbs,
struct dbs_data *dbs_data, bool modify_all)
{
struct cs_cpu_dbs_info_s *dbs_info = container_of(work,
struct cs_cpu_dbs_info_s, cdbs.work.work);
unsigned int cpu = dbs_info->cdbs.cur_policy->cpu;
struct cs_cpu_dbs_info_s *core_dbs_info = &per_cpu(cs_cpu_dbs_info,
cpu);
struct dbs_data *dbs_data = dbs_info->cdbs.cur_policy->governor_data;
struct cs_dbs_tuners *cs_tuners = dbs_data->tuners;
int delay = delay_for_sampling_rate(cs_tuners->sampling_rate);
bool modify_all = true;
mutex_lock(&core_dbs_info->cdbs.timer_mutex);
if (!need_load_eval(&core_dbs_info->cdbs, cs_tuners->sampling_rate))
modify_all = false;
else
dbs_check_cpu(dbs_data, cpu);
if (modify_all)
dbs_check_cpu(dbs_data, cdbs->shared->policy->cpu);
gov_queue_work(dbs_data, dbs_info->cdbs.cur_policy, delay, modify_all);
mutex_unlock(&core_dbs_info->cdbs.timer_mutex);
return delay_for_sampling_rate(cs_tuners->sampling_rate);
}
static int dbs_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
@ -135,7 +124,7 @@ static int dbs_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
if (!dbs_info->enable)
return 0;
policy = dbs_info->cdbs.cur_policy;
policy = dbs_info->cdbs.shared->policy;
/*
* we only care if our internally tracked freq moves outside the 'valid'

196
drivers/cpufreq/cpufreq_governor.c
View File

@ -32,10 +32,10 @@ static struct attribute_group *get_sysfs_attr(struct dbs_data *dbs_data)
void dbs_check_cpu(struct dbs_data *dbs_data, int cpu)
{
struct cpu_dbs_common_info *cdbs = dbs_data->cdata->get_cpu_cdbs(cpu);
struct cpu_dbs_info *cdbs = dbs_data->cdata->get_cpu_cdbs(cpu);
struct od_dbs_tuners *od_tuners = dbs_data->tuners;
struct cs_dbs_tuners *cs_tuners = dbs_data->tuners;
struct cpufreq_policy *policy;
struct cpufreq_policy *policy = cdbs->shared->policy;
unsigned int sampling_rate;
unsigned int max_load = 0;
unsigned int ignore_nice;
@ -60,11 +60,9 @@ void dbs_check_cpu(struct dbs_data *dbs_data, int cpu)
ignore_nice = cs_tuners->ignore_nice_load;
}
policy = cdbs->cur_policy;
/* Get Absolute Load */
for_each_cpu(j, policy->cpus) {
struct cpu_dbs_common_info *j_cdbs;
struct cpu_dbs_info *j_cdbs;
u64 cur_wall_time, cur_idle_time;
unsigned int idle_time, wall_time;
unsigned int load;
@ -163,9 +161,9 @@ EXPORT_SYMBOL_GPL(dbs_check_cpu);
static inline void __gov_queue_work(int cpu, struct dbs_data *dbs_data,
unsigned int delay)
{
struct cpu_dbs_common_info *cdbs = dbs_data->cdata->get_cpu_cdbs(cpu);
struct cpu_dbs_info *cdbs = dbs_data->cdata->get_cpu_cdbs(cpu);
mod_delayed_work_on(cpu, system_wq, &cdbs->work, delay);
mod_delayed_work_on(cpu, system_wq, &cdbs->dwork, delay);
}
void gov_queue_work(struct dbs_data *dbs_data, struct cpufreq_policy *policy,
@ -199,33 +197,63 @@ EXPORT_SYMBOL_GPL(gov_queue_work);
static inline void gov_cancel_work(struct dbs_data *dbs_data,
struct cpufreq_policy *policy)
{
struct cpu_dbs_common_info *cdbs;
struct cpu_dbs_info *cdbs;
int i;
for_each_cpu(i, policy->cpus) {
cdbs = dbs_data->cdata->get_cpu_cdbs(i);
cancel_delayed_work_sync(&cdbs->work);
cancel_delayed_work_sync(&cdbs->dwork);
}
}
/* Will return if we need to evaluate cpu load again or not */
bool need_load_eval(struct cpu_dbs_common_info *cdbs,
unsigned int sampling_rate)
static bool need_load_eval(struct cpu_common_dbs_info *shared,
unsigned int sampling_rate)
{
if (policy_is_shared(cdbs->cur_policy)) {
if (policy_is_shared(shared->policy)) {
ktime_t time_now = ktime_get();
s64 delta_us = ktime_us_delta(time_now, cdbs->time_stamp);
s64 delta_us = ktime_us_delta(time_now, shared->time_stamp);
/* Do nothing if we recently have sampled */
if (delta_us < (s64)(sampling_rate / 2))
return false;
else
cdbs->time_stamp = time_now;
shared->time_stamp = time_now;
}
return true;
}
EXPORT_SYMBOL_GPL(need_load_eval);
static void dbs_timer(struct work_struct *work)
{
struct cpu_dbs_info *cdbs = container_of(work, struct cpu_dbs_info,
dwork.work);
struct cpu_common_dbs_info *shared = cdbs->shared;
struct cpufreq_policy *policy = shared->policy;
struct dbs_data *dbs_data = policy->governor_data;
unsigned int sampling_rate, delay;
bool modify_all = true;
mutex_lock(&shared->timer_mutex);
if (dbs_data->cdata->governor == GOV_CONSERVATIVE) {
struct cs_dbs_tuners *cs_tuners = dbs_data->tuners;
sampling_rate = cs_tuners->sampling_rate;
} else {
struct od_dbs_tuners *od_tuners = dbs_data->tuners;
sampling_rate = od_tuners->sampling_rate;
}
if (!need_load_eval(cdbs->shared, sampling_rate))
modify_all = false;
delay = dbs_data->cdata->gov_dbs_timer(cdbs, dbs_data, modify_all);
gov_queue_work(dbs_data, policy, delay, modify_all);
mutex_unlock(&shared->timer_mutex);
}
static void set_sampling_rate(struct dbs_data *dbs_data,
unsigned int sampling_rate)
@ -239,6 +267,37 @@ static void set_sampling_rate(struct dbs_data *dbs_data,
}
}
static int alloc_common_dbs_info(struct cpufreq_policy *policy,
struct common_dbs_data *cdata)
{
struct cpu_common_dbs_info *shared;
int j;
/* Allocate memory for the common information for policy->cpus */
shared = kzalloc(sizeof(*shared), GFP_KERNEL);
if (!shared)
return -ENOMEM;
/* Set shared for all CPUs, online+offline */
for_each_cpu(j, policy->related_cpus)
cdata->get_cpu_cdbs(j)->shared = shared;
return 0;
}
static void free_common_dbs_info(struct cpufreq_policy *policy,
struct common_dbs_data *cdata)
{
struct cpu_dbs_info *cdbs = cdata->get_cpu_cdbs(policy->cpu);
struct cpu_common_dbs_info *shared = cdbs->shared;
int j;
for_each_cpu(j, policy->cpus)
cdata->get_cpu_cdbs(j)->shared = NULL;
kfree(shared);
}
static int cpufreq_governor_init(struct cpufreq_policy *policy,
struct dbs_data *dbs_data,
struct common_dbs_data *cdata)
@ -246,9 +305,18 @@ static int cpufreq_governor_init(struct cpufreq_policy *policy,
unsigned int latency;
int ret;
/* State should be equivalent to EXIT */
if (policy->governor_data)
return -EBUSY;
if (dbs_data) {
if (WARN_ON(have_governor_per_policy()))
return -EINVAL;
ret = alloc_common_dbs_info(policy, cdata);
if (ret)
return ret;
dbs_data->usage_count++;
policy->governor_data = dbs_data;
return 0;
@ -258,12 +326,16 @@ static int cpufreq_governor_init(struct cpufreq_policy *policy,
if (!dbs_data)
return -ENOMEM;
ret = alloc_common_dbs_info(policy, cdata);
if (ret)
goto free_dbs_data;
dbs_data->cdata = cdata;
dbs_data->usage_count = 1;
ret = cdata->init(dbs_data, !policy->governor->initialized);
if (ret)
goto free_dbs_data;
goto free_common_dbs_info;
/* policy latency is in ns. Convert it to us first */
latency = policy->cpuinfo.transition_latency / 1000;
@ -300,15 +372,22 @@ put_kobj:
}
cdata_exit:
cdata->exit(dbs_data, !policy->governor->initialized);
free_common_dbs_info:
free_common_dbs_info(policy, cdata);
free_dbs_data:
kfree(dbs_data);
return ret;
}
static void cpufreq_governor_exit(struct cpufreq_policy *policy,
struct dbs_data *dbs_data)
static int cpufreq_governor_exit(struct cpufreq_policy *policy,
struct dbs_data *dbs_data)
{
struct common_dbs_data *cdata = dbs_data->cdata;
struct cpu_dbs_info *cdbs = cdata->get_cpu_cdbs(policy->cpu);
/* State should be equivalent to INIT */
if (!cdbs->shared || cdbs->shared->policy)
return -EBUSY;
policy->governor_data = NULL;
if (!--dbs_data->usage_count) {
@ -323,6 +402,9 @@ static void cpufreq_governor_exit(struct cpufreq_policy *policy,
cdata->exit(dbs_data, policy->governor->initialized == 1);
kfree(dbs_data);
}
free_common_dbs_info(policy, cdata);
return 0;
}
static int cpufreq_governor_start(struct cpufreq_policy *policy,
@ -330,12 +412,17 @@ static int cpufreq_governor_start(struct cpufreq_policy *policy,
{
struct common_dbs_data *cdata = dbs_data->cdata;
unsigned int sampling_rate, ignore_nice, j, cpu = policy->cpu;
struct cpu_dbs_common_info *cpu_cdbs = cdata->get_cpu_cdbs(cpu);
struct cpu_dbs_info *cdbs = cdata->get_cpu_cdbs(cpu);
struct cpu_common_dbs_info *shared = cdbs->shared;
int io_busy = 0;
if (!policy->cur)
return -EINVAL;
/* State should be equivalent to INIT */
if (!shared || shared->policy)
return -EBUSY;
if (cdata->governor == GOV_CONSERVATIVE) {
struct cs_dbs_tuners *cs_tuners = dbs_data->tuners;
@ -349,12 +436,14 @@ static int cpufreq_governor_start(struct cpufreq_policy *policy,
io_busy = od_tuners->io_is_busy;
}
shared->policy = policy;
shared->time_stamp = ktime_get();
mutex_init(&shared->timer_mutex);
for_each_cpu(j, policy->cpus) {
struct cpu_dbs_common_info *j_cdbs = cdata->get_cpu_cdbs(j);
struct cpu_dbs_info *j_cdbs = cdata->get_cpu_cdbs(j);
unsigned int prev_load;
j_cdbs->cpu = j;
j_cdbs->cur_policy = policy;
j_cdbs->prev_cpu_idle =
get_cpu_idle_time(j, &j_cdbs->prev_cpu_wall, io_busy);
@ -366,8 +455,7 @@ static int cpufreq_governor_start(struct cpufreq_policy *policy,
if (ignore_nice)
j_cdbs->prev_cpu_nice = kcpustat_cpu(j).cpustat[CPUTIME_NICE];
mutex_init(&j_cdbs->timer_mutex);
INIT_DEFERRABLE_WORK(&j_cdbs->work, cdata->gov_dbs_timer);
INIT_DEFERRABLE_WORK(&j_cdbs->dwork, dbs_timer);
}
if (cdata->governor == GOV_CONSERVATIVE) {
@ -386,20 +474,24 @@ static int cpufreq_governor_start(struct cpufreq_policy *policy,
od_ops->powersave_bias_init_cpu(cpu);
}
/* Initiate timer time stamp */
cpu_cdbs->time_stamp = ktime_get();
gov_queue_work(dbs_data, policy, delay_for_sampling_rate(sampling_rate),
true);
return 0;
}
static void cpufreq_governor_stop(struct cpufreq_policy *policy,
struct dbs_data *dbs_data)
static int cpufreq_governor_stop(struct cpufreq_policy *policy,
struct dbs_data *dbs_data)
{
struct common_dbs_data *cdata = dbs_data->cdata;
unsigned int cpu = policy->cpu;
struct cpu_dbs_common_info *cpu_cdbs = cdata->get_cpu_cdbs(cpu);
struct cpu_dbs_info *cdbs = cdata->get_cpu_cdbs(cpu);
struct cpu_common_dbs_info *shared = cdbs->shared;
/* State should be equivalent to START */
if (!shared || !shared->policy)
return -EBUSY;
gov_cancel_work(dbs_data, policy);
if (cdata->governor == GOV_CONSERVATIVE) {
struct cs_cpu_dbs_info_s *cs_dbs_info =
@ -408,38 +500,40 @@ static void cpufreq_governor_stop(struct cpufreq_policy *policy,
cs_dbs_info->enable = 0;
}
gov_cancel_work(dbs_data, policy);
mutex_destroy(&cpu_cdbs->timer_mutex);
cpu_cdbs->cur_policy = NULL;
shared->policy = NULL;
mutex_destroy(&shared->timer_mutex);
return 0;
}
static void cpufreq_governor_limits(struct cpufreq_policy *policy,
struct dbs_data *dbs_data)
static int cpufreq_governor_limits(struct cpufreq_policy *policy,
struct dbs_data *dbs_data)
{
struct common_dbs_data *cdata = dbs_data->cdata;
unsigned int cpu = policy->cpu;
struct cpu_dbs_common_info *cpu_cdbs = cdata->get_cpu_cdbs(cpu);
struct cpu_dbs_info *cdbs = cdata->get_cpu_cdbs(cpu);
if (!cpu_cdbs->cur_policy)
return;
/* State should be equivalent to START */
if (!cdbs->shared || !cdbs->shared->policy)
return -EBUSY;
mutex_lock(&cpu_cdbs->timer_mutex);
if (policy->max < cpu_cdbs->cur_policy->cur)
__cpufreq_driver_target(cpu_cdbs->cur_policy, policy->max,
mutex_lock(&cdbs->shared->timer_mutex);
if (policy->max < cdbs->shared->policy->cur)
__cpufreq_driver_target(cdbs->shared->policy, policy->max,
CPUFREQ_RELATION_H);
else if (policy->min > cpu_cdbs->cur_policy->cur)
__cpufreq_driver_target(cpu_cdbs->cur_policy, policy->min,
else if (policy->min > cdbs->shared->policy->cur)
__cpufreq_driver_target(cdbs->shared->policy, policy->min,
CPUFREQ_RELATION_L);
dbs_check_cpu(dbs_data, cpu);
mutex_unlock(&cpu_cdbs->timer_mutex);
mutex_unlock(&cdbs->shared->timer_mutex);
return 0;
}
int cpufreq_governor_dbs(struct cpufreq_policy *policy,
struct common_dbs_data *cdata, unsigned int event)
{
struct dbs_data *dbs_data;
int ret = 0;
int ret;
/* Lock governor to block concurrent initialization of governor */
mutex_lock(&cdata->mutex);
@ -449,7 +543,7 @@ int cpufreq_governor_dbs(struct cpufreq_policy *policy,
else
dbs_data = cdata->gdbs_data;
if (WARN_ON(!dbs_data && (event != CPUFREQ_GOV_POLICY_INIT))) {
if (!dbs_data && (event != CPUFREQ_GOV_POLICY_INIT)) {
ret = -EINVAL;
goto unlock;
}
@ -459,17 +553,19 @@ int cpufreq_governor_dbs(struct cpufreq_policy *policy,
ret = cpufreq_governor_init(policy, dbs_data, cdata);
break;
case CPUFREQ_GOV_POLICY_EXIT:
cpufreq_governor_exit(policy, dbs_data);
ret = cpufreq_governor_exit(policy, dbs_data);
break;
case CPUFREQ_GOV_START:
ret = cpufreq_governor_start(policy, dbs_data);
break;
case CPUFREQ_GOV_STOP:
cpufreq_governor_stop(policy, dbs_data);
ret = cpufreq_governor_stop(policy, dbs_data);
break;
case CPUFREQ_GOV_LIMITS:
cpufreq_governor_limits(policy, dbs_data);
ret = cpufreq_governor_limits(policy, dbs_data);
break;
default:
ret = -EINVAL;
}
unlock:

40
drivers/cpufreq/cpufreq_governor.h
View File

@ -109,7 +109,7 @@ store_one(_gov, file_name)
/* create helper routines */
#define define_get_cpu_dbs_routines(_dbs_info) \
static struct cpu_dbs_common_info *get_cpu_cdbs(int cpu) \
static struct cpu_dbs_info *get_cpu_cdbs(int cpu) \
{ \
return &per_cpu(_dbs_info, cpu).cdbs; \
} \
@ -128,9 +128,20 @@ static void *get_cpu_dbs_info_s(int cpu) \
* cs_*: Conservative governor
*/
/* Common to all CPUs of a policy */
struct cpu_common_dbs_info {
struct cpufreq_policy *policy;
/*
* percpu mutex that serializes governor limit change with dbs_timer
* invocation. We do not want dbs_timer to run when user is changing
* the governor or limits.
*/
struct mutex timer_mutex;
ktime_t time_stamp;
};
/* Per cpu structures */
struct cpu_dbs_common_info {
int cpu;
struct cpu_dbs_info {
u64 prev_cpu_idle;
u64 prev_cpu_wall;
u64 prev_cpu_nice;
@ -141,19 +152,12 @@ struct cpu_dbs_common_info {
* wake-up from idle.
*/
unsigned int prev_load;
struct cpufreq_policy *cur_policy;
struct delayed_work work;
/*
* percpu mutex that serializes governor limit change with gov_dbs_timer
* invocation. We do not want gov_dbs_timer to run when user is changing
* the governor or limits.
*/
struct mutex timer_mutex;
ktime_t time_stamp;
struct delayed_work dwork;
struct cpu_common_dbs_info *shared;
};
struct od_cpu_dbs_info_s {
struct cpu_dbs_common_info cdbs;
struct cpu_dbs_info cdbs;
struct cpufreq_frequency_table *freq_table;
unsigned int freq_lo;
unsigned int freq_lo_jiffies;
@ -163,7 +167,7 @@ struct od_cpu_dbs_info_s {
};
struct cs_cpu_dbs_info_s {
struct cpu_dbs_common_info cdbs;
struct cpu_dbs_info cdbs;
unsigned int down_skip;
unsigned int requested_freq;
unsigned int enable:1;
@ -204,9 +208,11 @@ struct common_dbs_data {
*/
struct dbs_data *gdbs_data;
struct cpu_dbs_common_info *(*get_cpu_cdbs)(int cpu);
struct cpu_dbs_info *(*get_cpu_cdbs)(int cpu);
void *(*get_cpu_dbs_info_s)(int cpu);
void (*gov_dbs_timer)(struct work_struct *work);
unsigned int (*gov_dbs_timer)(struct cpu_dbs_info *cdbs,
struct dbs_data *dbs_data,
bool modify_all);
void (*gov_check_cpu)(int cpu, unsigned int load);
int (*init)(struct dbs_data *dbs_data, bool notify);
void (*exit)(struct dbs_data *dbs_data, bool notify);
@ -265,8 +271,6 @@ static ssize_t show_sampling_rate_min_gov_pol \
extern struct mutex cpufreq_governor_lock;
void dbs_check_cpu(struct dbs_data *dbs_data, int cpu);
bool need_load_eval(struct cpu_dbs_common_info *cdbs,
unsigned int sampling_rate);
int cpufreq_governor_dbs(struct cpufreq_policy *policy,
struct common_dbs_data *cdata, unsigned int event);
void gov_queue_work(struct dbs_data *dbs_data, struct cpufreq_policy *policy,

67
drivers/cpufreq/cpufreq_ondemand.c
View File

@ -155,7 +155,7 @@ static void dbs_freq_increase(struct cpufreq_policy *policy, unsigned int freq)
static void od_check_cpu(int cpu, unsigned int load)
{
struct od_cpu_dbs_info_s *dbs_info = &per_cpu(od_cpu_dbs_info, cpu);
struct cpufreq_policy *policy = dbs_info->cdbs.cur_policy;
struct cpufreq_policy *policy = dbs_info->cdbs.shared->policy;
struct dbs_data *dbs_data = policy->governor_data;
struct od_dbs_tuners *od_tuners = dbs_data->tuners;
@ -191,46 +191,40 @@ static void od_check_cpu(int cpu, unsigned int load)
}
}
static void od_dbs_timer(struct work_struct *work)
static unsigned int od_dbs_timer(struct cpu_dbs_info *cdbs,
struct dbs_data *dbs_data, bool modify_all)
{
struct od_cpu_dbs_info_s *dbs_info =
container_of(work, struct od_cpu_dbs_info_s, cdbs.work.work);
unsigned int cpu = dbs_info->cdbs.cur_policy->cpu;
struct od_cpu_dbs_info_s *core_dbs_info = &per_cpu(od_cpu_dbs_info,
struct cpufreq_policy *policy = cdbs->shared->policy;
unsigned int cpu = policy->cpu;
struct od_cpu_dbs_info_s *dbs_info = &per_cpu(od_cpu_dbs_info,
cpu);
struct dbs_data *dbs_data = dbs_info->cdbs.cur_policy->governor_data;
struct od_dbs_tuners *od_tuners = dbs_data->tuners;
int delay = 0, sample_type = core_dbs_info->sample_type;
bool modify_all = true;
int delay = 0, sample_type = dbs_info->sample_type;
mutex_lock(&core_dbs_info->cdbs.timer_mutex);
if (!need_load_eval(&core_dbs_info->cdbs, od_tuners->sampling_rate)) {
modify_all = false;
if (!modify_all)
goto max_delay;
}
/* Common NORMAL_SAMPLE setup */
core_dbs_info->sample_type = OD_NORMAL_SAMPLE;
dbs_info->sample_type = OD_NORMAL_SAMPLE;
if (sample_type == OD_SUB_SAMPLE) {
delay = core_dbs_info->freq_lo_jiffies;
__cpufreq_driver_target(core_dbs_info->cdbs.cur_policy,
core_dbs_info->freq_lo, CPUFREQ_RELATION_H);
delay = dbs_info->freq_lo_jiffies;
__cpufreq_driver_target(policy, dbs_info->freq_lo,
CPUFREQ_RELATION_H);
} else {
dbs_check_cpu(dbs_data, cpu);
if (core_dbs_info->freq_lo) {
if (dbs_info->freq_lo) {
/* Setup timer for SUB_SAMPLE */
core_dbs_info->sample_type = OD_SUB_SAMPLE;
delay = core_dbs_info->freq_hi_jiffies;
dbs_info->sample_type = OD_SUB_SAMPLE;
delay = dbs_info->freq_hi_jiffies;
}
}
max_delay:
if (!delay)
delay = delay_for_sampling_rate(od_tuners->sampling_rate
* core_dbs_info->rate_mult);
* dbs_info->rate_mult);
gov_queue_work(dbs_data, dbs_info->cdbs.cur_policy, delay, modify_all);
mutex_unlock(&core_dbs_info->cdbs.timer_mutex);
return delay;
}
/************************** sysfs interface ************************/
@ -273,27 +267,27 @@ static void update_sampling_rate(struct dbs_data *dbs_data,
dbs_info = &per_cpu(od_cpu_dbs_info, cpu);
cpufreq_cpu_put(policy);
mutex_lock(&dbs_info->cdbs.timer_mutex);
mutex_lock(&dbs_info->cdbs.shared->timer_mutex);
if (!delayed_work_pending(&dbs_info->cdbs.work)) {
mutex_unlock(&dbs_info->cdbs.timer_mutex);
if (!delayed_work_pending(&dbs_info->cdbs.dwork)) {
mutex_unlock(&dbs_info->cdbs.shared->timer_mutex);
continue;
}
next_sampling = jiffies + usecs_to_jiffies(new_rate);
appointed_at = dbs_info->cdbs.work.timer.expires;
appointed_at = dbs_info->cdbs.dwork.timer.expires;
if (time_before(next_sampling, appointed_at)) {
mutex_unlock(&dbs_info->cdbs.timer_mutex);
cancel_delayed_work_sync(&dbs_info->cdbs.work);
mutex_lock(&dbs_info->cdbs.timer_mutex);
mutex_unlock(&dbs_info->cdbs.shared->timer_mutex);
cancel_delayed_work_sync(&dbs_info->cdbs.dwork);
mutex_lock(&dbs_info->cdbs.shared->timer_mutex);
gov_queue_work(dbs_data, dbs_info->cdbs.cur_policy,
usecs_to_jiffies(new_rate), true);
gov_queue_work(dbs_data, policy,
usecs_to_jiffies(new_rate), true);
}
mutex_unlock(&dbs_info->cdbs.timer_mutex);
mutex_unlock(&dbs_info->cdbs.shared->timer_mutex);
}
}
@ -556,13 +550,16 @@ static void od_set_powersave_bias(unsigned int powersave_bias)
get_online_cpus();
for_each_online_cpu(cpu) {
struct cpu_common_dbs_info *shared;
if (cpumask_test_cpu(cpu, &done))
continue;
policy = per_cpu(od_cpu_dbs_info, cpu).cdbs.cur_policy;
if (!policy)
shared = per_cpu(od_cpu_dbs_info, cpu).cdbs.shared;
if (!shared)
continue;
policy = shared->policy;
cpumask_or(&done, &done, policy->cpus);
if (policy->governor != &cpufreq_gov_ondemand)

2
drivers/cpufreq/e_powersaver.c
View File

@ -78,7 +78,7 @@ static int eps_acpi_init(void)
static int eps_acpi_exit(struct cpufreq_policy *policy)
{
if (eps_acpi_cpu_perf) {
acpi_processor_unregister_performance(eps_acpi_cpu_perf, 0);
acpi_processor_unregister_performance(0);
free_cpumask_var(eps_acpi_cpu_perf->shared_cpu_map);
kfree(eps_acpi_cpu_perf);
eps_acpi_cpu_perf = NULL;

20
drivers/cpufreq/ia64-acpi-cpufreq.c
View File

@ -29,7 +29,6 @@ MODULE_LICENSE("GPL");
struct cpufreq_acpi_io {
struct acpi_processor_performance acpi_data;
struct cpufreq_frequency_table *freq_table;
unsigned int resume;
};
@ -221,6 +220,7 @@ acpi_cpufreq_cpu_init (
unsigned int cpu = policy->cpu;
struct cpufreq_acpi_io *data;
unsigned int result = 0;
struct cpufreq_frequency_table *freq_table;
pr_debug("acpi_cpufreq_cpu_init\n");
@ -254,10 +254,10 @@ acpi_cpufreq_cpu_init (
}
/* alloc freq_table */
data->freq_table = kzalloc(sizeof(*data->freq_table) *
freq_table = kzalloc(sizeof(*freq_table) *
(data->acpi_data.state_count + 1),
GFP_KERNEL);
if (!data->freq_table) {
if (!freq_table) {
result = -ENOMEM;
goto err_unreg;
}
@ -276,14 +276,14 @@ acpi_cpufreq_cpu_init (
for (i = 0; i <= data->acpi_data.state_count; i++)
{
if (i < data->acpi_data.state_count) {
data->freq_table[i].frequency =
freq_table[i].frequency =
data->acpi_data.states[i].core_frequency * 1000;
} else {
data->freq_table[i].frequency = CPUFREQ_TABLE_END;
freq_table[i].frequency = CPUFREQ_TABLE_END;
}
}
result = cpufreq_table_validate_and_show(policy, data->freq_table);
result = cpufreq_table_validate_and_show(policy, freq_table);
if (result) {
goto err_freqfree;
}
@ -311,9 +311,9 @@ acpi_cpufreq_cpu_init (
return (result);
err_freqfree:
kfree(data->freq_table);
kfree(freq_table);
err_unreg:
acpi_processor_unregister_performance(&data->acpi_data, cpu);
acpi_processor_unregister_performance(cpu);
err_free:
kfree(data);
acpi_io_data[cpu] = NULL;
@ -332,8 +332,8 @@ acpi_cpufreq_cpu_exit (
if (data) {
acpi_io_data[policy->cpu] = NULL;
acpi_processor_unregister_performance(&data->acpi_data,
policy->cpu);
acpi_processor_unregister_performance(policy->cpu);
kfree(policy->freq_table);
kfree(data);
}

18
drivers/cpufreq/integrator-cpufreq.c
View File

@ -98,11 +98,10 @@ static int integrator_set_target(struct cpufreq_policy *policy,
/* get current setting */
cm_osc = __raw_readl(cm_base + INTEGRATOR_HDR_OSC_OFFSET);
if (machine_is_integrator()) {
if (machine_is_integrator())
vco.s = (cm_osc >> 8) & 7;
} else if (machine_is_cintegrator()) {
else if (machine_is_cintegrator())
vco.s = 1;
}
vco.v = cm_osc & 255;
vco.r = 22;
freqs.old = icst_hz(&cclk_params, vco) / 1000;
@ -163,11 +162,10 @@ static unsigned int integrator_get(unsigned int cpu)
/* detect memory etc. */
cm_osc = __raw_readl(cm_base + INTEGRATOR_HDR_OSC_OFFSET);
if (machine_is_integrator()) {
if (machine_is_integrator())
vco.s = (cm_osc >> 8) & 7;
} else {
else
vco.s = 1;
}
vco.v = cm_osc & 255;
vco.r = 22;
@ -203,7 +201,7 @@ static int __init integrator_cpufreq_probe(struct platform_device *pdev)
struct resource *res;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
if (!res)
return -ENODEV;
cm_base = devm_ioremap(&pdev->dev, res->start, resource_size(res));
@ -234,6 +232,6 @@ static struct platform_driver integrator_cpufreq_driver = {
module_platform_driver_probe(integrator_cpufreq_driver,
integrator_cpufreq_probe);
MODULE_AUTHOR ("Russell M. King");
MODULE_DESCRIPTION ("cpufreq driver for ARM Integrator CPUs");
MODULE_LICENSE ("GPL");
MODULE_AUTHOR("Russell M. King");
MODULE_DESCRIPTION("cpufreq driver for ARM Integrator CPUs");
MODULE_LICENSE("GPL");

11
drivers/cpufreq/intel_pstate.c
View File

@ -484,12 +484,11 @@ static void __init intel_pstate_sysfs_expose_params(void)
}
/************************** sysfs end ************************/
static void intel_pstate_hwp_enable(void)
static void intel_pstate_hwp_enable(struct cpudata *cpudata)
{
hwp_active++;
pr_info("intel_pstate: HWP enabled\n");
wrmsrl( MSR_PM_ENABLE, 0x1);
wrmsrl_on_cpu(cpudata->cpu, MSR_PM_ENABLE, 0x1);
}
static int byt_get_min_pstate(void)
@ -933,6 +932,10 @@ static int intel_pstate_init_cpu(unsigned int cpunum)
cpu = all_cpu_data[cpunum];
cpu->cpu = cpunum;
if (hwp_active)
intel_pstate_hwp_enable(cpu);
intel_pstate_get_cpu_pstates(cpu);
init_timer_deferrable(&cpu->timer);
@ -1246,7 +1249,7 @@ static int __init intel_pstate_init(void)
return -ENOMEM;
if (static_cpu_has_safe(X86_FEATURE_HWP) && !no_hwp)
intel_pstate_hwp_enable();
hwp_active++;
if (!hwp_active && hwp_only)
goto out;

4
drivers/cpufreq/powernow-k7.c
View File

@ -421,7 +421,7 @@ static int powernow_acpi_init(void)
return 0;
err2:
acpi_processor_unregister_performance(acpi_processor_perf, 0);
acpi_processor_unregister_performance(0);
err1:
free_cpumask_var(acpi_processor_perf->shared_cpu_map);
err05:
@ -661,7 +661,7 @@ static int powernow_cpu_exit(struct cpufreq_policy *policy)
{
#ifdef CONFIG_X86_POWERNOW_K7_ACPI
if (acpi_processor_perf) {
acpi_processor_unregister_performance(acpi_processor_perf, 0);
acpi_processor_unregister_performance(0);
free_cpumask_var(acpi_processor_perf->shared_cpu_map);
kfree(acpi_processor_perf);
}

5
drivers/cpufreq/powernow-k8.c
View File

@ -795,7 +795,7 @@ err_out_mem:
kfree(powernow_table);
err_out:
acpi_processor_unregister_performance(&data->acpi_data, data->cpu);
acpi_processor_unregister_performance(data->cpu);
/* data->acpi_data.state_count informs us at ->exit()
* whether ACPI was used */
@ -863,8 +863,7 @@ static int fill_powernow_table_fidvid(struct powernow_k8_data *data,
static void powernow_k8_cpu_exit_acpi(struct powernow_k8_data *data)
{
if (data->acpi_data.state_count)
acpi_processor_unregister_performance(&data->acpi_data,
data->cpu);
acpi_processor_unregister_performance(data->cpu);
free_cpumask_var(data->acpi_data.shared_cpu_map);
}

16
drivers/xen/xen-acpi-processor.c
View File

@ -560,11 +560,9 @@ static int __init xen_acpi_processor_init(void)
return 0;
err_unregister:
for_each_possible_cpu(i) {
struct acpi_processor_performance *perf;
perf = per_cpu_ptr(acpi_perf_data, i);
acpi_processor_unregister_performance(perf, i);
}
for_each_possible_cpu(i)
acpi_processor_unregister_performance(i);
err_out:
/* Freeing a NULL pointer is OK: alloc_percpu zeroes. */
free_acpi_perf_data();
@ -579,11 +577,9 @@ static void __exit xen_acpi_processor_exit(void)
kfree(acpi_ids_done);
kfree(acpi_id_present);
kfree(acpi_id_cst_present);
for_each_possible_cpu(i) {
struct acpi_processor_performance *perf;
perf = per_cpu_ptr(acpi_perf_data, i);
acpi_processor_unregister_performance(perf, i);
}
for_each_possible_cpu(i)
acpi_processor_unregister_performance(i);
free_acpi_perf_data();
}

5
include/acpi/processor.h
View File

@ -228,10 +228,7 @@ extern int acpi_processor_preregister_performance(struct
extern int acpi_processor_register_performance(struct acpi_processor_performance
*performance, unsigned int cpu);
extern void acpi_processor_unregister_performance(struct
acpi_processor_performance
*performance,
unsigned int cpu);
extern void acpi_processor_unregister_performance(unsigned int cpu);
/* note: this locks both the calling module and the processor module
if a _PPC object exists, rmmod is disallowed then */