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path: root/drivers/cpufreq/intel_pstate.c
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Diffstat (limited to 'drivers/cpufreq/intel_pstate.c')
-rw-r--r--drivers/cpufreq/intel_pstate.c107
1 files changed, 43 insertions, 64 deletions
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index 5175ae3cac44..f0401064d7aa 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -819,19 +819,21 @@ static struct freq_attr *hwp_cpufreq_attrs[] = {
NULL,
};
-static void intel_pstate_get_hwp_max(struct cpudata *cpu, int *phy_max,
- int *current_max)
+static void __intel_pstate_get_hwp_cap(struct cpudata *cpu)
{
u64 cap;
rdmsrl_on_cpu(cpu->cpu, MSR_HWP_CAPABILITIES, &cap);
WRITE_ONCE(cpu->hwp_cap_cached, cap);
- if (global.no_turbo || global.turbo_disabled)
- *current_max = HWP_GUARANTEED_PERF(cap);
- else
- *current_max = HWP_HIGHEST_PERF(cap);
+ cpu->pstate.max_pstate = HWP_GUARANTEED_PERF(cap);
+ cpu->pstate.turbo_pstate = HWP_HIGHEST_PERF(cap);
+}
- *phy_max = HWP_HIGHEST_PERF(cap);
+static void intel_pstate_get_hwp_cap(struct cpudata *cpu)
+{
+ __intel_pstate_get_hwp_cap(cpu);
+ cpu->pstate.max_freq = cpu->pstate.max_pstate * cpu->pstate.scaling;
+ cpu->pstate.turbo_freq = cpu->pstate.turbo_pstate * cpu->pstate.scaling;
}
static void intel_pstate_hwp_set(unsigned int cpu)
@@ -1195,12 +1197,13 @@ static ssize_t store_no_turbo(struct kobject *a, struct kobj_attribute *b,
static void update_qos_request(enum freq_qos_req_type type)
{
- int max_state, turbo_max, freq, i, perf_pct;
struct freq_qos_request *req;
struct cpufreq_policy *policy;
+ int i;
for_each_possible_cpu(i) {
struct cpudata *cpu = all_cpu_data[i];
+ unsigned int freq, perf_pct;
policy = cpufreq_cpu_get(i);
if (!policy)
@@ -1213,9 +1216,7 @@ static void update_qos_request(enum freq_qos_req_type type)
continue;
if (hwp_active)
- intel_pstate_get_hwp_max(cpu, &turbo_max, &max_state);
- else
- turbo_max = cpu->pstate.turbo_pstate;
+ intel_pstate_get_hwp_cap(cpu);
if (type == FREQ_QOS_MIN) {
perf_pct = global.min_perf_pct;
@@ -1224,8 +1225,7 @@ static void update_qos_request(enum freq_qos_req_type type)
perf_pct = global.max_perf_pct;
}
- freq = DIV_ROUND_UP(turbo_max * perf_pct, 100);
- freq *= cpu->pstate.scaling;
+ freq = DIV_ROUND_UP(cpu->pstate.turbo_freq * perf_pct, 100);
if (freq_qos_update_request(req, freq) < 0)
pr_warn("Failed to update freq constraint: CPU%d\n", i);
@@ -1715,21 +1715,17 @@ static void intel_pstate_get_cpu_pstates(struct cpudata *cpu)
{
cpu->pstate.min_pstate = pstate_funcs.get_min();
cpu->pstate.max_pstate_physical = pstate_funcs.get_max_physical();
- cpu->pstate.turbo_pstate = pstate_funcs.get_turbo();
cpu->pstate.scaling = pstate_funcs.get_scaling();
if (hwp_active && !hwp_mode_bdw) {
- unsigned int phy_max, current_max;
-
- intel_pstate_get_hwp_max(cpu, &phy_max, &current_max);
- cpu->pstate.turbo_freq = phy_max * cpu->pstate.scaling;
- cpu->pstate.turbo_pstate = phy_max;
- cpu->pstate.max_pstate = HWP_GUARANTEED_PERF(READ_ONCE(cpu->hwp_cap_cached));
+ __intel_pstate_get_hwp_cap(cpu);
} else {
- cpu->pstate.turbo_freq = cpu->pstate.turbo_pstate * cpu->pstate.scaling;
cpu->pstate.max_pstate = pstate_funcs.get_max();
+ cpu->pstate.turbo_pstate = pstate_funcs.get_turbo();
}
+
cpu->pstate.max_freq = cpu->pstate.max_pstate * cpu->pstate.scaling;
+ cpu->pstate.turbo_freq = cpu->pstate.turbo_pstate * cpu->pstate.scaling;
if (pstate_funcs.get_aperf_mperf_shift)
cpu->aperf_mperf_shift = pstate_funcs.get_aperf_mperf_shift();
@@ -2199,41 +2195,34 @@ static void intel_pstate_update_perf_limits(struct cpudata *cpu,
unsigned int policy_min,
unsigned int policy_max)
{
+ int scaling = cpu->pstate.scaling;
int32_t max_policy_perf, min_policy_perf;
- int max_state, turbo_max;
- int max_freq;
/*
- * HWP needs some special consideration, because on BDX the
- * HWP_REQUEST uses abstract value to represent performance
- * rather than pure ratios.
+ * HWP needs some special consideration, because HWP_REQUEST uses
+ * abstract values to represent performance rather than pure ratios.
*/
- if (hwp_active) {
- intel_pstate_get_hwp_max(cpu, &turbo_max, &max_state);
- } else {
- max_state = global.no_turbo || global.turbo_disabled ?
- cpu->pstate.max_pstate : cpu->pstate.turbo_pstate;
- turbo_max = cpu->pstate.turbo_pstate;
- }
- max_freq = max_state * cpu->pstate.scaling;
+ if (hwp_active)
+ intel_pstate_get_hwp_cap(cpu);
- max_policy_perf = max_state * policy_max / max_freq;
+ max_policy_perf = policy_max / scaling;
if (policy_max == policy_min) {
min_policy_perf = max_policy_perf;
} else {
- min_policy_perf = max_state * policy_min / max_freq;
+ min_policy_perf = policy_min / scaling;
min_policy_perf = clamp_t(int32_t, min_policy_perf,
0, max_policy_perf);
}
- pr_debug("cpu:%d max_state %d min_policy_perf:%d max_policy_perf:%d\n",
- cpu->cpu, max_state, min_policy_perf, max_policy_perf);
+ pr_debug("cpu:%d min_policy_perf:%d max_policy_perf:%d\n",
+ cpu->cpu, min_policy_perf, max_policy_perf);
/* Normalize user input to [min_perf, max_perf] */
if (per_cpu_limits) {
cpu->min_perf_ratio = min_policy_perf;
cpu->max_perf_ratio = max_policy_perf;
} else {
+ int turbo_max = cpu->pstate.turbo_pstate;
int32_t global_min, global_max;
/* Global limits are in percent of the maximum turbo P-state. */
@@ -2322,10 +2311,9 @@ static void intel_pstate_verify_cpu_policy(struct cpudata *cpu,
update_turbo_state();
if (hwp_active) {
- int max_state, turbo_max;
-
- intel_pstate_get_hwp_max(cpu, &turbo_max, &max_state);
- max_freq = max_state * cpu->pstate.scaling;
+ intel_pstate_get_hwp_cap(cpu);
+ max_freq = global.no_turbo || global.turbo_disabled ?
+ cpu->pstate.max_freq : cpu->pstate.turbo_freq;
} else {
max_freq = intel_pstate_get_max_freq(cpu);
}
@@ -2416,25 +2404,15 @@ static int __intel_pstate_cpu_init(struct cpufreq_policy *policy)
cpu->max_perf_ratio = 0xFF;
cpu->min_perf_ratio = 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();
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;
-
- if (hwp_active) {
- unsigned int max_freq;
-
- max_freq = global.turbo_disabled ?
cpu->pstate.max_freq : cpu->pstate.turbo_freq;
- if (max_freq < policy->cpuinfo.max_freq)
- policy->cpuinfo.max_freq = max_freq;
- }
+
+ policy->min = policy->cpuinfo.min_freq;
+ policy->max = policy->cpuinfo.max_freq;
intel_pstate_init_acpi_perf_limits(policy);
@@ -2683,10 +2661,10 @@ static void intel_cpufreq_adjust_perf(unsigned int cpunum,
static int intel_cpufreq_cpu_init(struct cpufreq_policy *policy)
{
- int max_state, turbo_max, min_freq, max_freq, ret;
struct freq_qos_request *req;
struct cpudata *cpu;
struct device *dev;
+ int ret, freq;
dev = get_cpu_device(policy->cpu);
if (!dev)
@@ -2711,30 +2689,31 @@ static int intel_cpufreq_cpu_init(struct cpufreq_policy *policy)
if (hwp_active) {
u64 value;
- intel_pstate_get_hwp_max(cpu, &turbo_max, &max_state);
policy->transition_delay_us = INTEL_CPUFREQ_TRANSITION_DELAY_HWP;
+
+ intel_pstate_get_hwp_cap(cpu);
+
rdmsrl_on_cpu(cpu->cpu, MSR_HWP_REQUEST, &value);
WRITE_ONCE(cpu->hwp_req_cached, value);
+
cpu->epp_cached = intel_pstate_get_epp(cpu, value);
} else {
- turbo_max = cpu->pstate.turbo_pstate;
policy->transition_delay_us = INTEL_CPUFREQ_TRANSITION_DELAY;
}
- min_freq = DIV_ROUND_UP(turbo_max * global.min_perf_pct, 100);
- min_freq *= cpu->pstate.scaling;
- max_freq = DIV_ROUND_UP(turbo_max * global.max_perf_pct, 100);
- max_freq *= cpu->pstate.scaling;
+ freq = DIV_ROUND_UP(cpu->pstate.turbo_freq * global.min_perf_pct, 100);
ret = freq_qos_add_request(&policy->constraints, req, FREQ_QOS_MIN,
- min_freq);
+ freq);
if (ret < 0) {
dev_err(dev, "Failed to add min-freq constraint (%d)\n", ret);
goto free_req;
}
+ freq = DIV_ROUND_UP(cpu->pstate.turbo_freq * global.max_perf_pct, 100);
+
ret = freq_qos_add_request(&policy->constraints, req + 1, FREQ_QOS_MAX,
- max_freq);
+ freq);
if (ret < 0) {
dev_err(dev, "Failed to add max-freq constraint (%d)\n", ret);
goto remove_min_req;
generated by cgit v1.2.3 (git 2.39.0) at 2025-10-31 14:55:43 +0300