diff options
Diffstat (limited to 'drivers/cpufreq/intel_pstate.c')
| -rw-r--r-- | drivers/cpufreq/intel_pstate.c | 55 |
1 files changed, 51 insertions, 4 deletions
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index 742eefba12c..872c5772c5d 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -148,6 +148,8 @@ struct perf_limits { int32_t min_perf; int max_policy_pct; int max_sysfs_pct; + int min_policy_pct; + int min_sysfs_pct; }; static struct perf_limits limits = { @@ -159,6 +161,8 @@ static struct perf_limits limits = { .min_perf = 0, .max_policy_pct = 100, .max_sysfs_pct = 100, + .min_policy_pct = 0, + .min_sysfs_pct = 0, }; static inline void pid_reset(struct _pid *pid, int setpoint, int busy, @@ -338,6 +342,33 @@ static void __init intel_pstate_debug_expose_params(void) return sprintf(buf, "%u\n", limits.object); \ } +static ssize_t show_turbo_pct(struct kobject *kobj, + struct attribute *attr, char *buf) +{ + struct cpudata *cpu; + int total, no_turbo, turbo_pct; + uint32_t turbo_fp; + + cpu = all_cpu_data[0]; + + total = cpu->pstate.turbo_pstate - cpu->pstate.min_pstate + 1; + no_turbo = cpu->pstate.max_pstate - cpu->pstate.min_pstate + 1; + turbo_fp = div_fp(int_tofp(no_turbo), int_tofp(total)); + turbo_pct = 100 - fp_toint(mul_fp(turbo_fp, int_tofp(100))); + return sprintf(buf, "%u\n", turbo_pct); +} + +static ssize_t show_num_pstates(struct kobject *kobj, + struct attribute *attr, char *buf) +{ + struct cpudata *cpu; + int total; + + cpu = all_cpu_data[0]; + total = cpu->pstate.turbo_pstate - cpu->pstate.min_pstate + 1; + return sprintf(buf, "%u\n", total); +} + static ssize_t show_no_turbo(struct kobject *kobj, struct attribute *attr, char *buf) { @@ -404,7 +435,9 @@ static ssize_t store_min_perf_pct(struct kobject *a, struct attribute *b, ret = sscanf(buf, "%u", &input); if (ret != 1) return -EINVAL; - limits.min_perf_pct = clamp_t(int, input, 0 , 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 = div_fp(int_tofp(limits.min_perf_pct), int_tofp(100)); if (hwp_active) @@ -418,11 +451,15 @@ show_one(min_perf_pct, min_perf_pct); define_one_global_rw(no_turbo); define_one_global_rw(max_perf_pct); define_one_global_rw(min_perf_pct); +define_one_global_ro(turbo_pct); +define_one_global_ro(num_pstates); static struct attribute *intel_pstate_attributes[] = { &no_turbo.attr, &max_perf_pct.attr, &min_perf_pct.attr, + &turbo_pct.attr, + &num_pstates.attr, NULL }; @@ -825,6 +862,7 @@ static const struct x86_cpu_id intel_pstate_cpu_ids[] = { ICPU(0x46, core_params), ICPU(0x47, core_params), ICPU(0x4c, byt_params), + ICPU(0x4e, core_params), ICPU(0x4f, core_params), ICPU(0x56, core_params), {} @@ -887,7 +925,9 @@ static int intel_pstate_set_policy(struct cpufreq_policy *policy) if (!policy->cpuinfo.max_freq) return -ENODEV; - if (policy->policy == CPUFREQ_POLICY_PERFORMANCE) { + 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; @@ -897,8 +937,9 @@ static int intel_pstate_set_policy(struct cpufreq_policy *policy) return 0; } - limits.min_perf_pct = (policy->min * 100) / policy->cpuinfo.max_freq; - limits.min_perf_pct = clamp_t(int, limits.min_perf_pct, 0 , 100); + 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.min_perf_pct = max(limits.min_policy_pct, limits.min_sysfs_pct); limits.min_perf = div_fp(int_tofp(limits.min_perf_pct), int_tofp(100)); limits.max_policy_pct = (policy->max * 100) / policy->cpuinfo.max_freq; @@ -978,6 +1019,7 @@ static struct cpufreq_driver intel_pstate_driver = { static int __initdata no_load; static int __initdata no_hwp; +static int __initdata hwp_only; static unsigned int force_load; static int intel_pstate_msrs_not_valid(void) @@ -1175,6 +1217,9 @@ static int __init intel_pstate_init(void) if (cpu_has(c,X86_FEATURE_HWP) && !no_hwp) intel_pstate_hwp_enable(); + if (!hwp_active && hwp_only) + goto out; + rc = cpufreq_register_driver(&intel_pstate_driver); if (rc) goto out; @@ -1209,6 +1254,8 @@ static int __init intel_pstate_setup(char *str) no_hwp = 1; if (!strcmp(str, "force")) force_load = 1; + if (!strcmp(str, "hwp_only")) + hwp_only = 1; return 0; } early_param("intel_pstate", intel_pstate_setup); |