Commit c6e53c69 authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
Browse files

Merge back earlier cpufreq material for v4.3.

parents 559ed407 454d3a25

drivers/acpi/processor_perflib.c

+1 −3
Original line number Diff line number Diff line
@@ -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;

drivers/cpufreq/acpi-cpufreq.c

+51 −42
Original line number Diff line number Diff line
@@ -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;



	data = policy->driver_data;

	cpufreq_cpu_put(policy);

	if (unlikely(!data || !data->freq_table))

		return 0;

	}



	cached_freq = data->freq_table[data->acpi_data->state].frequency;

	freq = extract_freq(get_cur_val(cpumask_of(cpu)), data);

	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;



		pr_debug("adding sysfs entry for cpb\n");

	if (!check_amd_hwpstate_cpu(0)) {

		struct freq_attr **attr;



		for (iter = acpi_cpufreq_attr; *iter != NULL; iter++)

			;

		pr_debug("CPB unsupported, do not expose it\n");



		/* 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();

drivers/cpufreq/cpufreq.c

+45 −62
Original line number Diff line number Diff line
@@ -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);

		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;

}

drivers/cpufreq/cpufreq_conservative.c

+7 −18
Original line number Diff line number Diff line
@@ -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'

drivers/cpufreq/cpufreq_governor.c

+146 −50

File changed.

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