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-rw-r--r--drivers/cpufreq/intel_pstate.c142
1 files changed, 85 insertions, 57 deletions
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index 6a5a22192128..93a3c635ea27 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -167,7 +167,20 @@ struct perf_limits {
int min_perf_ctl;
};
-static struct perf_limits limits = {
+static struct perf_limits performance_limits = {
+ .no_turbo = 0,
+ .turbo_disabled = 0,
+ .max_perf_pct = 100,
+ .max_perf = int_tofp(1),
+ .min_perf_pct = 100,
+ .min_perf = int_tofp(1),
+ .max_policy_pct = 100,
+ .max_sysfs_pct = 100,
+ .min_policy_pct = 0,
+ .min_sysfs_pct = 0,
+};
+
+static struct perf_limits powersave_limits = {
.no_turbo = 0,
.turbo_disabled = 0,
.max_perf_pct = 100,
@@ -182,6 +195,12 @@ static struct perf_limits limits = {
.min_perf_ctl = 0,
};
+#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE
+static struct perf_limits *limits = &performance_limits;
+#else
+static struct perf_limits *limits = &powersave_limits;
+#endif
+
#if IS_ENABLED(CONFIG_ACPI)
/*
* The max target pstate ratio is a 8 bit value in both PLATFORM_INFO MSR and
@@ -256,7 +275,7 @@ static int intel_pstate_init_perf_limits(struct cpufreq_policy *policy)
if (turbo_pss_ctl <= cpu->pstate.max_pstate &&
turbo_pss_ctl > cpu->pstate.min_pstate) {
pr_debug("intel_pstate: no turbo range exists in _PSS\n");
- limits.no_turbo = limits.turbo_disabled = 1;
+ limits->no_turbo = limits->turbo_disabled = 1;
cpu->pstate.turbo_pstate = cpu->pstate.max_pstate;
turbo_absent = true;
}
@@ -415,7 +434,7 @@ static inline void update_turbo_state(void)
cpu = all_cpu_data[0];
rdmsrl(MSR_IA32_MISC_ENABLE, misc_en);
- limits.turbo_disabled =
+ limits->turbo_disabled =
(misc_en & MSR_IA32_MISC_ENABLE_TURBO_DISABLE ||
cpu->pstate.max_pstate == cpu->pstate.turbo_pstate);
}
@@ -434,14 +453,14 @@ static void intel_pstate_hwp_set(void)
for_each_online_cpu(cpu) {
rdmsrl_on_cpu(cpu, MSR_HWP_REQUEST, &value);
- adj_range = limits.min_perf_pct * range / 100;
+ adj_range = limits->min_perf_pct * range / 100;
min = hw_min + adj_range;
value &= ~HWP_MIN_PERF(~0L);
value |= HWP_MIN_PERF(min);
- adj_range = limits.max_perf_pct * range / 100;
+ adj_range = limits->max_perf_pct * range / 100;
max = hw_min + adj_range;
- if (limits.no_turbo) {
+ if (limits->no_turbo) {
hw_max = HWP_GUARANTEED_PERF(cap);
if (hw_max < max)
max = hw_max;
@@ -510,7 +529,7 @@ static void __init intel_pstate_debug_expose_params(void)
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", limits->object); \
}
static ssize_t show_turbo_pct(struct kobject *kobj,
@@ -546,10 +565,10 @@ static ssize_t show_no_turbo(struct kobject *kobj,
ssize_t ret;
update_turbo_state();
- if (limits.turbo_disabled)
- ret = sprintf(buf, "%u\n", limits.turbo_disabled);
+ if (limits->turbo_disabled)
+ ret = sprintf(buf, "%u\n", limits->turbo_disabled);
else
- ret = sprintf(buf, "%u\n", limits.no_turbo);
+ ret = sprintf(buf, "%u\n", limits->no_turbo);
return ret;
}
@@ -565,12 +584,12 @@ static ssize_t store_no_turbo(struct kobject *a, struct attribute *b,
return -EINVAL;
update_turbo_state();
- if (limits.turbo_disabled) {
+ if (limits->turbo_disabled) {
pr_warn("intel_pstate: Turbo disabled by BIOS or unavailable on processor\n");
return -EPERM;
}
- limits.no_turbo = clamp_t(int, input, 0, 1);
+ limits->no_turbo = clamp_t(int, input, 0, 1);
if (hwp_active)
intel_pstate_hwp_set();
@@ -588,11 +607,15 @@ static ssize_t store_max_perf_pct(struct kobject *a, struct attribute *b,
if (ret != 1)
return -EINVAL;
- 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_fp(int_tofp(limits.max_perf_pct), int_tofp(100));
+ 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_fp(int_tofp(limits->max_perf_pct),
+ int_tofp(100));
if (hwp_active)
intel_pstate_hwp_set();
@@ -609,11 +632,15 @@ static ssize_t store_min_perf_pct(struct kobject *a, struct attribute *b,
if (ret != 1)
return -EINVAL;
- 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_fp(int_tofp(limits.min_perf_pct), int_tofp(100));
+ 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_fp(int_tofp(limits->min_perf_pct),
+ int_tofp(100));
if (hwp_active)
intel_pstate_hwp_set();
@@ -693,7 +720,7 @@ static void byt_set_pstate(struct cpudata *cpudata, int pstate)
u32 vid;
val = (u64)pstate << 8;
- if (limits.no_turbo && !limits.turbo_disabled)
+ if (limits->no_turbo && !limits->turbo_disabled)
val |= (u64)1 << 32;
vid_fp = cpudata->vid.min + mul_fp(
@@ -822,7 +849,7 @@ static void core_set_pstate(struct cpudata *cpudata, int pstate)
u64 val;
val = (u64)pstate << 8;
- if (limits.no_turbo && !limits.turbo_disabled)
+ if (limits->no_turbo && !limits->turbo_disabled)
val |= (u64)1 << 32;
wrmsrl_on_cpu(cpudata->cpu, MSR_IA32_PERF_CTL, val);
@@ -905,7 +932,7 @@ static void intel_pstate_get_min_max(struct cpudata *cpu, int *min, int *max)
int max_perf_adj;
int min_perf;
- if (limits.no_turbo || limits.turbo_disabled)
+ if (limits->no_turbo || limits->turbo_disabled)
max_perf = cpu->pstate.max_pstate;
/*
@@ -913,21 +940,21 @@ static void intel_pstate_get_min_max(struct cpudata *cpu, int *min, int *max)
* policy, or by cpu specific default values determined through
* experimentation.
*/
- if (limits.max_perf_ctl && limits.max_sysfs_pct >=
- limits.max_policy_pct) {
- *max = limits.max_perf_ctl;
+ if (limits->max_perf_ctl && limits->max_sysfs_pct >=
+ limits->max_policy_pct) {
+ *max = limits->max_perf_ctl;
} else {
max_perf_adj = fp_toint(mul_fp(int_tofp(max_perf),
- limits.max_perf));
+ limits->max_perf));
*max = clamp_t(int, max_perf_adj, cpu->pstate.min_pstate,
cpu->pstate.turbo_pstate);
}
- if (limits.min_perf_ctl) {
- *min = limits.min_perf_ctl;
+ if (limits->min_perf_ctl) {
+ *min = limits->min_perf_ctl;
} else {
min_perf = fp_toint(mul_fp(int_tofp(max_perf),
- limits.min_perf));
+ limits->min_perf));
*min = clamp_t(int, min_perf, cpu->pstate.min_pstate, max_perf);
}
}
@@ -1215,34 +1242,35 @@ static int intel_pstate_set_policy(struct cpufreq_policy *policy)
if (policy->policy == CPUFREQ_POLICY_PERFORMANCE &&
policy->max >= policy->cpuinfo.max_freq) {
- limits.min_policy_pct = 100;
- limits.min_perf_pct = 100;
- limits.min_perf = int_tofp(1);
- limits.max_policy_pct = 100;
- limits.max_perf_pct = 100;
- limits.max_perf = int_tofp(1);
- limits.no_turbo = 0;
- limits.max_perf_ctl = 0;
- limits.min_perf_ctl = 0;
+ pr_debug("intel_pstate: set performance\n");
+ limits = &performance_limits;
return 0;
}
- limits.min_policy_pct = (policy->min * 100) / policy->cpuinfo.max_freq;
- limits.min_policy_pct = clamp_t(int, limits.min_policy_pct, 0 , 100);
- limits.max_policy_pct = (policy->max * 100) / policy->cpuinfo.max_freq;
- limits.max_policy_pct = clamp_t(int, limits.max_policy_pct, 0 , 100);
+ pr_debug("intel_pstate: set powersave\n");
+ limits = &powersave_limits;
+ limits->min_policy_pct = (policy->min * 100) / policy->cpuinfo.max_freq;
+ limits->min_policy_pct = clamp_t(int, limits->min_policy_pct, 0 , 100);
+ limits->max_policy_pct = (policy->max * 100) / policy->cpuinfo.max_freq;
+ limits->max_policy_pct = clamp_t(int, limits->max_policy_pct, 0 , 100);
/* 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);
+ 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);
/* Make sure min_perf_pct <= max_perf_pct */
- limits.min_perf_pct = min(limits.max_perf_pct, limits.min_perf_pct);
+ limits->min_perf_pct = min(limits->max_perf_pct, limits->min_perf_pct);
- limits.min_perf = div_fp(int_tofp(limits.min_perf_pct), int_tofp(100));
- limits.max_perf = div_fp(int_tofp(limits.max_perf_pct), int_tofp(100));
+ limits->min_perf = div_fp(int_tofp(limits->min_perf_pct),
+ int_tofp(100));
+ limits->max_perf = div_fp(int_tofp(limits->max_perf_pct),
+ int_tofp(100));
#if IS_ENABLED(CONFIG_ACPI)
cpu = all_cpu_data[policy->cpu];
@@ -1251,14 +1279,14 @@ static int intel_pstate_set_policy(struct cpufreq_policy *policy)
control = convert_to_native_pstate_format(cpu, i);
if (control * cpu->pstate.scaling == policy->max)
- limits.max_perf_ctl = control;
+ limits->max_perf_ctl = control;
if (control * cpu->pstate.scaling == policy->min)
- limits.min_perf_ctl = control;
+ limits->min_perf_ctl = control;
}
pr_debug("intel_pstate: max %u policy_max %u perf_ctl [0x%x-0x%x]\n",
- policy->cpuinfo.max_freq, policy->max, limits.min_perf_ctl,
- limits.max_perf_ctl);
+ policy->cpuinfo.max_freq, policy->max, limits->min_perf_ctl,
+ limits->max_perf_ctl);
#endif
if (hwp_active)
@@ -1303,7 +1331,7 @@ static int intel_pstate_cpu_init(struct cpufreq_policy *policy)
cpu = all_cpu_data[policy->cpu];
- if (limits.min_perf_pct == 100 && limits.max_perf_pct == 100)
+ if (limits->min_perf_pct == 100 && limits->max_perf_pct == 100)
policy->policy = CPUFREQ_POLICY_PERFORMANCE;
else
policy->policy = CPUFREQ_POLICY_POWERSAVE;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-22 10:17:04 +0000