#include <linux/hrtimer.h>
#include <linux/tick.h>
#include <linux/slab.h>
-#include <linux/sched.h>
+#include <linux/sched/cpufreq.h>
#include <linux/list.h>
#include <linux/cpu.h>
#include <linux/cpufreq.h>
#define INTEL_CPUFREQ_TRANSITION_LATENCY 20000
-#define ATOM_RATIOS 0x66a
-#define ATOM_VIDS 0x66b
-#define ATOM_TURBO_RATIOS 0x66c
-#define ATOM_TURBO_VIDS 0x66d
-
#ifdef CONFIG_ACPI
#include <acpi/processor.h>
#include <acpi/cppc_acpi.h>
return div64_u64(x << EXT_FRAC_BITS, y);
}
+static inline int32_t percent_ext_fp(int percent)
+{
+ return div_ext_fp(percent, 100);
+}
+
/**
* struct sample - Store performance sample
* @core_avg_perf: Ratio of APERF/MPERF which is the actual average
};
/**
- * struct perf_limits - Store user and policy limits
- * @no_turbo: User requested turbo state from intel_pstate sysfs
- * @turbo_disabled: Platform turbo status either from msr
- * MSR_IA32_MISC_ENABLE or when maximum available pstate
- * matches the maximum turbo pstate
- * @max_perf_pct: Effective maximum performance limit in percentage, this
- * is minimum of either limits enforced by cpufreq policy
- * or limits from user set limits via intel_pstate sysfs
- * @min_perf_pct: Effective minimum performance limit in percentage, this
- * is maximum of either limits enforced by cpufreq policy
- * or limits from user set limits via intel_pstate sysfs
- * @max_perf: This is a scaled value between 0 to 255 for max_perf_pct
- * This value is used to limit max pstate
- * @min_perf: This is a scaled value between 0 to 255 for min_perf_pct
- * This value is used to limit min pstate
- * @max_policy_pct: The maximum performance in percentage enforced by
- * cpufreq setpolicy interface
- * @max_sysfs_pct: The maximum performance in percentage enforced by
- * intel pstate sysfs interface, unused when per cpu
- * controls are enforced
- * @min_policy_pct: The minimum performance in percentage enforced by
- * cpufreq setpolicy interface
- * @min_sysfs_pct: The minimum performance in percentage enforced by
- * intel pstate sysfs interface, unused when per cpu
- * controls are enforced
- *
- * Storage for user and policy defined limits.
+ * struct global_params - Global parameters, mostly tunable via sysfs.
+ * @no_turbo: Whether or not to use turbo P-states.
+ * @turbo_disabled: Whethet or not turbo P-states are available at all,
+ * 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.
+ * @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
+ * P-state capacity.
*/
-struct perf_limits {
- int no_turbo;
- int turbo_disabled;
+struct global_params {
+ bool no_turbo;
+ bool turbo_disabled;
int max_perf_pct;
int min_perf_pct;
- int32_t max_perf;
- int32_t min_perf;
- int max_policy_pct;
- int max_sysfs_pct;
- int min_policy_pct;
- int min_sysfs_pct;
};
/**
* @prev_cummulative_iowait: IO Wait time difference from last and
* current sample
* @sample: Storage for storing last Sample data
- * @perf_limits: Pointer to perf_limit unique to this CPU
- * Not all field in the structure are applicable
- * when per cpu controls are enforced
+ * @min_perf: Minimum capacity limit as a fraction of the maximum
+ * turbo P-state capacity.
+ * @max_perf: Maximum capacity limit as a fraction of the maximum
+ * turbo P-state capacity.
* @acpi_perf_data: Stores ACPI perf information read from _PSS
* @valid_pss_table: Set to true for valid ACPI _PSS entries found
* @epp_powersave: Last saved HWP energy performance preference
u64 prev_tsc;
u64 prev_cummulative_iowait;
struct sample sample;
- struct perf_limits *perf_limits;
+ int32_t min_perf;
+ int32_t max_perf;
#ifdef CONFIG_ACPI
struct acpi_processor_performance acpi_perf_data;
bool valid_pss_table;
/**
* struct cpu_defaults- Per CPU model default config data
- * @pid_policy: PID config data
* @funcs: Callback function data
*/
struct cpu_defaults {
- struct pstate_adjust_policy pid_policy;
struct pstate_funcs funcs;
};
static inline int32_t get_target_pstate_use_performance(struct cpudata *cpu);
static inline int32_t get_target_pstate_use_cpu_load(struct cpudata *cpu);
-static struct pstate_adjust_policy pid_params __read_mostly;
static struct pstate_funcs pstate_funcs __read_mostly;
+static struct pstate_adjust_policy pid_params __read_mostly = {
+ .sample_rate_ms = 10,
+ .sample_rate_ns = 10 * NSEC_PER_MSEC,
+ .deadband = 0,
+ .setpoint = 97,
+ .p_gain_pct = 20,
+ .d_gain_pct = 0,
+ .i_gain_pct = 0,
+};
+
static int hwp_active __read_mostly;
static bool per_cpu_limits __read_mostly;
static bool acpi_ppc;
#endif
-static struct perf_limits performance_limits;
-static struct perf_limits powersave_limits;
-static struct perf_limits *limits;
-
-static void intel_pstate_init_limits(struct perf_limits *limits)
-{
- memset(limits, 0, sizeof(*limits));
- limits->max_perf_pct = 100;
- limits->max_perf = int_ext_tofp(1);
- limits->max_policy_pct = 100;
- limits->max_sysfs_pct = 100;
-}
-
-static void intel_pstate_set_performance_limits(struct perf_limits *limits)
-{
- intel_pstate_init_limits(limits);
- limits->min_perf_pct = 100;
- limits->min_perf = int_ext_tofp(1);
-}
+static struct global_params global;
static DEFINE_MUTEX(intel_pstate_driver_lock);
static DEFINE_MUTEX(intel_pstate_limits_lock);
* correct max turbo frequency based on the turbo state.
* Also need to convert to MHz as _PSS freq is in MHz.
*/
- if (!limits->turbo_disabled)
+ if (!global.turbo_disabled)
cpu->acpi_perf_data.states[0].core_frequency =
policy->cpuinfo.max_freq / 1000;
cpu->valid_pss_table = true;
pid_reset(&cpu->pid, pid_params.setpoint, 100, pid_params.deadband, 0);
}
-static inline void intel_pstate_reset_all_pid(void)
-{
- unsigned int cpu;
-
- for_each_online_cpu(cpu) {
- if (all_cpu_data[cpu])
- intel_pstate_busy_pid_reset(all_cpu_data[cpu]);
- }
-}
-
static inline void update_turbo_state(void)
{
u64 misc_en;
cpu = all_cpu_data[0];
rdmsrl(MSR_IA32_MISC_ENABLE, misc_en);
- limits->turbo_disabled =
+ global.turbo_disabled =
(misc_en & MSR_IA32_MISC_ENABLE_TURBO_DISABLE ||
cpu->pstate.max_pstate == cpu->pstate.turbo_pstate);
}
+static int min_perf_pct_min(void)
+{
+ struct cpudata *cpu = all_cpu_data[0];
+
+ return DIV_ROUND_UP(cpu->pstate.min_pstate * 100,
+ cpu->pstate.turbo_pstate);
+}
+
static s16 intel_pstate_get_epb(struct cpudata *cpu_data)
{
u64 epb;
static void intel_pstate_hwp_set(struct cpufreq_policy *policy)
{
- int min, hw_min, max, hw_max, cpu, range, adj_range;
- struct perf_limits *perf_limits = limits;
+ int min, hw_min, max, hw_max, cpu;
u64 value, cap;
for_each_cpu(cpu, policy->cpus) {
- int max_perf_pct, min_perf_pct;
struct cpudata *cpu_data = all_cpu_data[cpu];
s16 epp;
- if (per_cpu_limits)
- perf_limits = all_cpu_data[cpu]->perf_limits;
-
rdmsrl_on_cpu(cpu, MSR_HWP_CAPABILITIES, &cap);
hw_min = HWP_LOWEST_PERF(cap);
- if (limits->no_turbo)
+ if (global.no_turbo)
hw_max = HWP_GUARANTEED_PERF(cap);
else
hw_max = HWP_HIGHEST_PERF(cap);
- range = hw_max - hw_min;
- max_perf_pct = perf_limits->max_perf_pct;
- min_perf_pct = perf_limits->min_perf_pct;
+ max = fp_ext_toint(hw_max * cpu_data->max_perf);
+ if (cpu_data->policy == CPUFREQ_POLICY_PERFORMANCE)
+ min = max;
+ else
+ min = fp_ext_toint(hw_max * cpu_data->min_perf);
rdmsrl_on_cpu(cpu, MSR_HWP_REQUEST, &value);
- adj_range = min_perf_pct * range / 100;
- min = hw_min + adj_range;
+
value &= ~HWP_MIN_PERF(~0L);
value |= HWP_MIN_PERF(min);
- adj_range = max_perf_pct * range / 100;
- max = hw_min + adj_range;
-
value &= ~HWP_MAX_PERF(~0L);
value |= HWP_MAX_PERF(max);
}
}
-static int intel_pstate_hwp_set_policy(struct cpufreq_policy *policy)
-{
- if (hwp_active)
- intel_pstate_hwp_set(policy);
-
- return 0;
-}
-
static int intel_pstate_hwp_save_state(struct cpufreq_policy *policy)
{
struct cpudata *cpu_data = all_cpu_data[policy->cpu];
static int intel_pstate_resume(struct cpufreq_policy *policy)
{
- int ret;
-
if (!hwp_active)
return 0;
mutex_lock(&intel_pstate_limits_lock);
all_cpu_data[policy->cpu]->epp_policy = 0;
-
- ret = intel_pstate_hwp_set_policy(policy);
+ intel_pstate_hwp_set(policy);
mutex_unlock(&intel_pstate_limits_lock);
- return ret;
+ return 0;
}
static void intel_pstate_update_policies(void)
/************************** debugfs begin ************************/
static int pid_param_set(void *data, u64 val)
{
+ unsigned int cpu;
+
*(u32 *)data = val;
- intel_pstate_reset_all_pid();
+ pid_params.sample_rate_ns = pid_params.sample_rate_ms * NSEC_PER_MSEC;
+ for_each_possible_cpu(cpu)
+ if (all_cpu_data[cpu])
+ intel_pstate_busy_pid_reset(all_cpu_data[cpu]);
+
return 0;
}
static ssize_t show_##file_name \
(struct kobject *kobj, struct attribute *attr, char *buf) \
{ \
- return sprintf(buf, "%u\n", limits->object); \
+ return sprintf(buf, "%u\n", global.object); \
}
static ssize_t intel_pstate_show_status(char *buf);
}
update_turbo_state();
- if (limits->turbo_disabled)
- ret = sprintf(buf, "%u\n", limits->turbo_disabled);
+ if (global.turbo_disabled)
+ ret = sprintf(buf, "%u\n", global.turbo_disabled);
else
- ret = sprintf(buf, "%u\n", limits->no_turbo);
+ ret = sprintf(buf, "%u\n", global.no_turbo);
mutex_unlock(&intel_pstate_driver_lock);
mutex_lock(&intel_pstate_limits_lock);
update_turbo_state();
- if (limits->turbo_disabled) {
+ if (global.turbo_disabled) {
pr_warn("Turbo disabled by BIOS or unavailable on processor\n");
mutex_unlock(&intel_pstate_limits_lock);
mutex_unlock(&intel_pstate_driver_lock);
return -EPERM;
}
- limits->no_turbo = clamp_t(int, input, 0, 1);
+ global.no_turbo = clamp_t(int, input, 0, 1);
+
+ if (global.no_turbo) {
+ struct cpudata *cpu = all_cpu_data[0];
+ int pct = cpu->pstate.max_pstate * 100 / cpu->pstate.turbo_pstate;
+
+ /* Squash the global minimum into the permitted range. */
+ if (global.min_perf_pct > pct)
+ global.min_perf_pct = pct;
+ }
mutex_unlock(&intel_pstate_limits_lock);
mutex_lock(&intel_pstate_limits_lock);
- limits->max_sysfs_pct = clamp_t(int, input, 0 , 100);
- limits->max_perf_pct = min(limits->max_policy_pct,
- limits->max_sysfs_pct);
- limits->max_perf_pct = max(limits->min_policy_pct,
- limits->max_perf_pct);
- limits->max_perf_pct = max(limits->min_perf_pct,
- limits->max_perf_pct);
- limits->max_perf = div_ext_fp(limits->max_perf_pct, 100);
+ global.max_perf_pct = clamp_t(int, input, global.min_perf_pct, 100);
mutex_unlock(&intel_pstate_limits_lock);
mutex_lock(&intel_pstate_limits_lock);
- limits->min_sysfs_pct = clamp_t(int, input, 0 , 100);
- limits->min_perf_pct = max(limits->min_policy_pct,
- limits->min_sysfs_pct);
- limits->min_perf_pct = min(limits->max_policy_pct,
- limits->min_perf_pct);
- limits->min_perf_pct = min(limits->max_perf_pct,
- limits->min_perf_pct);
- limits->min_perf = div_ext_fp(limits->min_perf_pct, 100);
+ global.min_perf_pct = clamp_t(int, input,
+ min_perf_pct_min(), global.max_perf_pct);
mutex_unlock(&intel_pstate_limits_lock);
{
u64 value;
- rdmsrl(ATOM_RATIOS, value);
+ rdmsrl(MSR_ATOM_CORE_RATIOS, value);
return (value >> 8) & 0x7F;
}
{
u64 value;
- rdmsrl(ATOM_RATIOS, value);
+ rdmsrl(MSR_ATOM_CORE_RATIOS, value);
return (value >> 16) & 0x7F;
}
{
u64 value;
- rdmsrl(ATOM_TURBO_RATIOS, value);
+ rdmsrl(MSR_ATOM_CORE_TURBO_RATIOS, value);
return value & 0x7F;
}
u32 vid;
val = (u64)pstate << 8;
- if (limits->no_turbo && !limits->turbo_disabled)
+ if (global.no_turbo && !global.turbo_disabled)
val |= (u64)1 << 32;
vid_fp = cpudata->vid.min + mul_fp(
{
u64 value;
- rdmsrl(ATOM_VIDS, value);
+ rdmsrl(MSR_ATOM_CORE_VIDS, value);
cpudata->vid.min = int_tofp((value >> 8) & 0x7f);
cpudata->vid.max = int_tofp((value >> 16) & 0x7f);
cpudata->vid.ratio = div_fp(
int_tofp(cpudata->pstate.max_pstate -
cpudata->pstate.min_pstate));
- rdmsrl(ATOM_TURBO_VIDS, value);
+ rdmsrl(MSR_ATOM_CORE_TURBO_VIDS, value);
cpudata->vid.turbo = value & 0x7f;
}
u64 val;
val = (u64)pstate << 8;
- if (limits->no_turbo && !limits->turbo_disabled)
+ if (global.no_turbo && !global.turbo_disabled)
val |= (u64)1 << 32;
return val;
}
static struct cpu_defaults core_params = {
- .pid_policy = {
- .sample_rate_ms = 10,
- .deadband = 0,
- .setpoint = 97,
- .p_gain_pct = 20,
- .d_gain_pct = 0,
- .i_gain_pct = 0,
- },
.funcs = {
.get_max = core_get_max_pstate,
.get_max_physical = core_get_max_pstate_physical,
};
static const struct cpu_defaults silvermont_params = {
- .pid_policy = {
- .sample_rate_ms = 10,
- .deadband = 0,
- .setpoint = 60,
- .p_gain_pct = 14,
- .d_gain_pct = 0,
- .i_gain_pct = 4,
- },
.funcs = {
.get_max = atom_get_max_pstate,
.get_max_physical = atom_get_max_pstate,
};
static const struct cpu_defaults airmont_params = {
- .pid_policy = {
- .sample_rate_ms = 10,
- .deadband = 0,
- .setpoint = 60,
- .p_gain_pct = 14,
- .d_gain_pct = 0,
- .i_gain_pct = 4,
- },
.funcs = {
.get_max = atom_get_max_pstate,
.get_max_physical = atom_get_max_pstate,
};
static const struct cpu_defaults knl_params = {
- .pid_policy = {
- .sample_rate_ms = 10,
- .deadband = 0,
- .setpoint = 97,
- .p_gain_pct = 20,
- .d_gain_pct = 0,
- .i_gain_pct = 0,
- },
.funcs = {
.get_max = core_get_max_pstate,
.get_max_physical = core_get_max_pstate_physical,
};
static const struct cpu_defaults bxt_params = {
- .pid_policy = {
- .sample_rate_ms = 10,
- .deadband = 0,
- .setpoint = 60,
- .p_gain_pct = 14,
- .d_gain_pct = 0,
- .i_gain_pct = 4,
- },
.funcs = {
.get_max = core_get_max_pstate,
.get_max_physical = core_get_max_pstate_physical,
int max_perf = cpu->pstate.turbo_pstate;
int max_perf_adj;
int min_perf;
- struct perf_limits *perf_limits = limits;
- if (limits->no_turbo || limits->turbo_disabled)
+ if (global.no_turbo || global.turbo_disabled)
max_perf = cpu->pstate.max_pstate;
- if (per_cpu_limits)
- perf_limits = cpu->perf_limits;
-
/*
* performance can be limited by user through sysfs, by cpufreq
* policy, or by cpu specific default values determined through
* experimentation.
*/
- max_perf_adj = fp_ext_toint(max_perf * perf_limits->max_perf);
+ max_perf_adj = fp_ext_toint(max_perf * cpu->max_perf);
*max = clamp_t(int, max_perf_adj,
cpu->pstate.min_pstate, cpu->pstate.turbo_pstate);
- min_perf = fp_ext_toint(max_perf * perf_limits->min_perf);
+ min_perf = fp_ext_toint(max_perf * cpu->min_perf);
*min = clamp_t(int, min_perf, cpu->pstate.min_pstate, max_perf);
}
sample->busy_scaled = busy_frac * 100;
- target = limits->no_turbo || limits->turbo_disabled ?
+ target = global.no_turbo || global.turbo_disabled ?
cpu->pstate.max_pstate : cpu->pstate.turbo_pstate;
target += target >> 2;
target = mul_fp(target, busy_frac);
cpu = all_cpu_data[cpunum];
if (!cpu) {
- unsigned int size = sizeof(struct cpudata);
-
- if (per_cpu_limits)
- size += sizeof(struct perf_limits);
-
- cpu = kzalloc(size, GFP_KERNEL);
+ cpu = kzalloc(sizeof(*cpu), GFP_KERNEL);
if (!cpu)
return -ENOMEM;
all_cpu_data[cpunum] = cpu;
- if (per_cpu_limits)
- cpu->perf_limits = (struct perf_limits *)(cpu + 1);
cpu->epp_default = -EINVAL;
cpu->epp_powersave = -EINVAL;
synchronize_sched();
}
+static int intel_pstate_get_max_freq(struct cpudata *cpu)
+{
+ return global.turbo_disabled || global.no_turbo ?
+ cpu->pstate.max_freq : cpu->pstate.turbo_freq;
+}
+
static void intel_pstate_update_perf_limits(struct cpufreq_policy *policy,
- struct perf_limits *limits)
+ struct cpudata *cpu)
{
+ int max_freq = intel_pstate_get_max_freq(cpu);
+ int32_t max_policy_perf, min_policy_perf;
- limits->max_policy_pct = DIV_ROUND_UP(policy->max * 100,
- policy->cpuinfo.max_freq);
- limits->max_policy_pct = clamp_t(int, limits->max_policy_pct, 0, 100);
+ max_policy_perf = div_ext_fp(policy->max, max_freq);
+ max_policy_perf = clamp_t(int32_t, max_policy_perf, 0, int_ext_tofp(1));
if (policy->max == policy->min) {
- limits->min_policy_pct = limits->max_policy_pct;
+ min_policy_perf = max_policy_perf;
} else {
- limits->min_policy_pct = DIV_ROUND_UP(policy->min * 100,
- policy->cpuinfo.max_freq);
- limits->min_policy_pct = clamp_t(int, limits->min_policy_pct,
- 0, 100);
+ min_policy_perf = div_ext_fp(policy->min, max_freq);
+ min_policy_perf = clamp_t(int32_t, min_policy_perf,
+ 0, max_policy_perf);
}
- /* Normalize user input to [min_policy_pct, max_policy_pct] */
- limits->min_perf_pct = max(limits->min_policy_pct,
- limits->min_sysfs_pct);
- limits->min_perf_pct = min(limits->max_policy_pct,
- limits->min_perf_pct);
- limits->max_perf_pct = min(limits->max_policy_pct,
- limits->max_sysfs_pct);
- limits->max_perf_pct = max(limits->min_policy_pct,
- limits->max_perf_pct);
+ /* Normalize user input to [min_perf, max_perf] */
+ if (per_cpu_limits) {
+ cpu->min_perf = min_policy_perf;
+ cpu->max_perf = max_policy_perf;
+ } else {
+ int32_t global_min, global_max;
+
+ /* Global limits are in percent of the maximum turbo P-state. */
+ global_max = percent_ext_fp(global.max_perf_pct);
+ global_min = percent_ext_fp(global.min_perf_pct);
+ if (max_freq != cpu->pstate.turbo_freq) {
+ int32_t turbo_factor;
+
+ turbo_factor = div_ext_fp(cpu->pstate.turbo_pstate,
+ cpu->pstate.max_pstate);
+ global_min = mul_ext_fp(global_min, turbo_factor);
+ global_max = mul_ext_fp(global_max, turbo_factor);
+ }
+ global_min = clamp_t(int32_t, global_min, 0, global_max);
+
+ cpu->min_perf = max(min_policy_perf, global_min);
+ cpu->min_perf = min(cpu->min_perf, max_policy_perf);
+ cpu->max_perf = min(max_policy_perf, global_max);
+ cpu->max_perf = max(min_policy_perf, cpu->max_perf);
- /* Make sure min_perf_pct <= max_perf_pct */
- limits->min_perf_pct = min(limits->max_perf_pct, limits->min_perf_pct);
+ /* Make sure min_perf <= max_perf */
+ cpu->min_perf = min(cpu->min_perf, cpu->max_perf);
+ }
- limits->min_perf = div_ext_fp(limits->min_perf_pct, 100);
- limits->max_perf = div_ext_fp(limits->max_perf_pct, 100);
- limits->max_perf = round_up(limits->max_perf, EXT_FRAC_BITS);
- limits->min_perf = round_up(limits->min_perf, EXT_FRAC_BITS);
+ cpu->max_perf = round_up(cpu->max_perf, EXT_FRAC_BITS);
+ cpu->min_perf = round_up(cpu->min_perf, EXT_FRAC_BITS);
pr_debug("cpu:%d max_perf_pct:%d min_perf_pct:%d\n", policy->cpu,
- limits->max_perf_pct, limits->min_perf_pct);
+ fp_ext_toint(cpu->max_perf * 100),
+ fp_ext_toint(cpu->min_perf * 100));
}
static int intel_pstate_set_policy(struct cpufreq_policy *policy)
{
struct cpudata *cpu;
- struct perf_limits *perf_limits = NULL;
if (!policy->cpuinfo.max_freq)
return -ENODEV;
cpu = all_cpu_data[policy->cpu];
cpu->policy = policy->policy;
- if (cpu->pstate.max_pstate_physical > cpu->pstate.max_pstate &&
- policy->max < policy->cpuinfo.max_freq &&
- policy->max > cpu->pstate.max_pstate * cpu->pstate.scaling) {
- pr_debug("policy->max > max non turbo frequency\n");
- policy->max = policy->cpuinfo.max_freq;
- }
-
- if (per_cpu_limits)
- perf_limits = cpu->perf_limits;
-
mutex_lock(&intel_pstate_limits_lock);
- if (policy->policy == CPUFREQ_POLICY_PERFORMANCE) {
- if (!perf_limits) {
- limits = &performance_limits;
- perf_limits = limits;
- }
- if (policy->max >= policy->cpuinfo.max_freq &&
- !limits->no_turbo) {
- pr_debug("set performance\n");
- intel_pstate_set_performance_limits(perf_limits);
- goto out;
- }
- } else {
- pr_debug("set powersave\n");
- if (!perf_limits) {
- limits = &powersave_limits;
- perf_limits = limits;
- }
-
- }
+ intel_pstate_update_perf_limits(policy, cpu);
- intel_pstate_update_perf_limits(policy, perf_limits);
- out:
if (cpu->policy == CPUFREQ_POLICY_PERFORMANCE) {
/*
* NOHZ_FULL CPUs need this as the governor callback may not
intel_pstate_set_update_util_hook(policy->cpu);
- intel_pstate_hwp_set_policy(policy);
+ if (hwp_active)
+ intel_pstate_hwp_set(policy);
mutex_unlock(&intel_pstate_limits_lock);
return 0;
}
+static void intel_pstate_adjust_policy_max(struct cpufreq_policy *policy,
+ struct cpudata *cpu)
+{
+ if (cpu->pstate.max_pstate_physical > cpu->pstate.max_pstate &&
+ policy->max < policy->cpuinfo.max_freq &&
+ policy->max > cpu->pstate.max_freq) {
+ pr_debug("policy->max > max non turbo frequency\n");
+ policy->max = policy->cpuinfo.max_freq;
+ }
+}
+
static int intel_pstate_verify_policy(struct cpufreq_policy *policy)
{
struct cpudata *cpu = all_cpu_data[policy->cpu];
- struct perf_limits *perf_limits;
-
- if (policy->policy == CPUFREQ_POLICY_PERFORMANCE)
- perf_limits = &performance_limits;
- else
- perf_limits = &powersave_limits;
update_turbo_state();
- policy->cpuinfo.max_freq = perf_limits->turbo_disabled ||
- perf_limits->no_turbo ?
- cpu->pstate.max_freq :
- cpu->pstate.turbo_freq;
-
- cpufreq_verify_within_cpu_limits(policy);
+ cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq,
+ intel_pstate_get_max_freq(cpu));
if (policy->policy != CPUFREQ_POLICY_POWERSAVE &&
policy->policy != CPUFREQ_POLICY_PERFORMANCE)
return -EINVAL;
- /* When per-CPU limits are used, sysfs limits are not used */
- if (!per_cpu_limits) {
- unsigned int max_freq, min_freq;
-
- max_freq = policy->cpuinfo.max_freq *
- limits->max_sysfs_pct / 100;
- min_freq = policy->cpuinfo.max_freq *
- limits->min_sysfs_pct / 100;
- cpufreq_verify_within_limits(policy, min_freq, max_freq);
- }
+ intel_pstate_adjust_policy_max(policy, cpu);
return 0;
}
cpu = all_cpu_data[policy->cpu];
- /*
- * We need sane value in the cpu->perf_limits, so inherit from global
- * perf_limits limits, which are seeded with values based on the
- * CONFIG_CPU_FREQ_DEFAULT_GOV_*, during boot up.
- */
- if (per_cpu_limits)
- memcpy(cpu->perf_limits, limits, sizeof(struct perf_limits));
+ cpu->max_perf = int_ext_tofp(1);
+ cpu->min_perf = 0;
policy->min = cpu->pstate.min_pstate * cpu->pstate.scaling;
policy->max = cpu->pstate.turbo_pstate * cpu->pstate.scaling;
/* cpuinfo and default policy values */
policy->cpuinfo.min_freq = cpu->pstate.min_pstate * cpu->pstate.scaling;
update_turbo_state();
- policy->cpuinfo.max_freq = limits->turbo_disabled ?
+ policy->cpuinfo.max_freq = global.turbo_disabled ?
cpu->pstate.max_pstate : cpu->pstate.turbo_pstate;
policy->cpuinfo.max_freq *= cpu->pstate.scaling;
return ret;
policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;
- if (limits->min_perf_pct == 100 && limits->max_perf_pct == 100)
+ if (IS_ENABLED(CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE))
policy->policy = CPUFREQ_POLICY_PERFORMANCE;
else
policy->policy = CPUFREQ_POLICY_POWERSAVE;
struct cpudata *cpu = all_cpu_data[policy->cpu];
update_turbo_state();
- policy->cpuinfo.max_freq = limits->turbo_disabled ?
- cpu->pstate.max_freq : cpu->pstate.turbo_freq;
+ cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq,
+ intel_pstate_get_max_freq(cpu));
- cpufreq_verify_within_cpu_limits(policy);
+ intel_pstate_adjust_policy_max(policy, cpu);
- return 0;
-}
+ intel_pstate_update_perf_limits(policy, cpu);
-static unsigned int intel_cpufreq_turbo_update(struct cpudata *cpu,
- struct cpufreq_policy *policy,
- unsigned int target_freq)
-{
- unsigned int max_freq;
-
- update_turbo_state();
-
- max_freq = limits->no_turbo || limits->turbo_disabled ?
- cpu->pstate.max_freq : cpu->pstate.turbo_freq;
- policy->cpuinfo.max_freq = max_freq;
- if (policy->max > max_freq)
- policy->max = max_freq;
-
- if (target_freq > max_freq)
- target_freq = max_freq;
-
- return target_freq;
+ return 0;
}
static int intel_cpufreq_target(struct cpufreq_policy *policy,
struct cpufreq_freqs freqs;
int target_pstate;
+ update_turbo_state();
+
freqs.old = policy->cur;
- freqs.new = intel_cpufreq_turbo_update(cpu, policy, target_freq);
+ freqs.new = target_freq;
cpufreq_freq_transition_begin(policy, &freqs);
switch (relation) {
struct cpudata *cpu = all_cpu_data[policy->cpu];
int target_pstate;
- target_freq = intel_cpufreq_turbo_update(cpu, policy, target_freq);
+ update_turbo_state();
+
target_pstate = DIV_ROUND_UP(target_freq, cpu->pstate.scaling);
target_pstate = intel_pstate_prepare_request(cpu, target_pstate);
intel_pstate_update_pstate(cpu, target_pstate);
{
int ret;
- intel_pstate_init_limits(&powersave_limits);
- intel_pstate_set_performance_limits(&performance_limits);
- if (IS_ENABLED(CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE) &&
- intel_pstate_driver == &intel_pstate)
- limits = &performance_limits;
- else
- limits = &powersave_limits;
+ memset(&global, 0, sizeof(global));
+ global.max_perf_pct = 100;
ret = cpufreq_register_driver(intel_pstate_driver);
if (ret) {
return ret;
}
+ global.min_perf_pct = min_perf_pct_min();
+
mutex_lock(&intel_pstate_limits_lock);
driver_registered = true;
mutex_unlock(&intel_pstate_limits_lock);
return 0;
}
-static void __init copy_pid_params(struct pstate_adjust_policy *policy)
-{
- pid_params.sample_rate_ms = policy->sample_rate_ms;
- pid_params.sample_rate_ns = pid_params.sample_rate_ms * NSEC_PER_MSEC;
- pid_params.p_gain_pct = policy->p_gain_pct;
- pid_params.i_gain_pct = policy->i_gain_pct;
- pid_params.d_gain_pct = policy->d_gain_pct;
- pid_params.deadband = policy->deadband;
- pid_params.setpoint = policy->setpoint;
-}
-
#ifdef CONFIG_ACPI
static void intel_pstate_use_acpi_profile(void)
{
- if (acpi_gbl_FADT.preferred_profile == PM_MOBILE)
+ switch (acpi_gbl_FADT.preferred_profile) {
+ case PM_MOBILE:
+ case PM_TABLET:
+ case PM_APPLIANCE_PC:
+ case PM_DESKTOP:
+ case PM_WORKSTATION:
pstate_funcs.get_target_pstate =
get_target_pstate_use_cpu_load;
+ }
}
#else
static void intel_pstate_use_acpi_profile(void)
static int __init intel_pstate_init(void)
{
- const struct x86_cpu_id *id;
- struct cpu_defaults *cpu_def;
- int rc = 0;
+ int rc;
if (no_load)
return -ENODEV;
- if (x86_match_cpu(hwp_support_ids) && !no_hwp) {
+ if (x86_match_cpu(hwp_support_ids)) {
copy_cpu_funcs(&core_params.funcs);
- hwp_active++;
- intel_pstate.attr = hwp_cpufreq_attrs;
- goto hwp_cpu_matched;
- }
-
- id = x86_match_cpu(intel_pstate_cpu_ids);
- if (!id)
- return -ENODEV;
+ if (no_hwp) {
+ pstate_funcs.get_target_pstate = get_target_pstate_use_cpu_load;
+ } else {
+ hwp_active++;
+ intel_pstate.attr = hwp_cpufreq_attrs;
+ goto hwp_cpu_matched;
+ }
+ } else {
+ const struct x86_cpu_id *id;
+ struct cpu_defaults *cpu_def;
- cpu_def = (struct cpu_defaults *)id->driver_data;
+ id = x86_match_cpu(intel_pstate_cpu_ids);
+ if (!id)
+ return -ENODEV;
- copy_pid_params(&cpu_def->pid_policy);
- copy_cpu_funcs(&cpu_def->funcs);
+ cpu_def = (struct cpu_defaults *)id->driver_data;
+ copy_cpu_funcs(&cpu_def->funcs);
+ }
if (intel_pstate_msrs_not_valid())
return -ENODEV;
projects / karo-tx-linux.git / blobdiff