diff options
| -rw-r--r-- | drivers/cpufreq/intel_pstate.c | 48 |
1 files changed, 36 insertions, 12 deletions
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index 7547ab559a9..5f5f5ed1169 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -138,6 +138,7 @@ struct perf_limits { static struct perf_limits limits = { .no_turbo = 0, + .turbo_disabled = 0, .max_perf_pct = 100, .max_perf = int_tofp(1), .min_perf_pct = 0, @@ -218,6 +219,18 @@ static inline void intel_pstate_reset_all_pid(void) } } +static inline void update_turbo_state(void) +{ + u64 misc_en; + struct cpudata *cpu; + + cpu = all_cpu_data[0]; + rdmsrl(MSR_IA32_MISC_ENABLE, misc_en); + limits.turbo_disabled = + (misc_en & MSR_IA32_MISC_ENABLE_TURBO_DISABLE || + cpu->pstate.max_pstate == cpu->pstate.turbo_pstate); +} + /************************** debugfs begin ************************/ static int pid_param_set(void *data, u64 val) { @@ -274,6 +287,20 @@ static void __init intel_pstate_debug_expose_params(void) return sprintf(buf, "%u\n", limits.object); \ } +static ssize_t show_no_turbo(struct kobject *kobj, + struct attribute *attr, char *buf) +{ + ssize_t ret; + + update_turbo_state(); + if (limits.turbo_disabled) + ret = sprintf(buf, "%u\n", limits.turbo_disabled); + else + ret = sprintf(buf, "%u\n", limits.no_turbo); + + return ret; +} + static ssize_t store_no_turbo(struct kobject *a, struct attribute *b, const char *buf, size_t count) { @@ -283,11 +310,14 @@ static ssize_t store_no_turbo(struct kobject *a, struct attribute *b, ret = sscanf(buf, "%u", &input); if (ret != 1) return -EINVAL; - limits.no_turbo = clamp_t(int, input, 0 , 1); + + update_turbo_state(); if (limits.turbo_disabled) { pr_warn("Turbo disabled by BIOS or unavailable on processor\n"); - limits.no_turbo = limits.turbo_disabled; + return -EPERM; } + limits.no_turbo = clamp_t(int, input, 0, 1); + return count; } @@ -323,7 +353,6 @@ static ssize_t store_min_perf_pct(struct kobject *a, struct attribute *b, return count; } -show_one(no_turbo, no_turbo); show_one(max_perf_pct, max_perf_pct); show_one(min_perf_pct, min_perf_pct); @@ -501,7 +530,7 @@ 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) + if (limits.no_turbo || limits.turbo_disabled) max_perf = cpu->pstate.max_pstate; max_perf_adj = fp_toint(mul_fp(int_tofp(max_perf), limits.max_perf)); @@ -516,6 +545,8 @@ static void intel_pstate_set_pstate(struct cpudata *cpu, int pstate) { int max_perf, min_perf; + update_turbo_state(); + intel_pstate_get_min_max(cpu, &min_perf, &max_perf); pstate = clamp_t(int, pstate, min_perf, max_perf); @@ -717,7 +748,7 @@ static int intel_pstate_set_policy(struct cpufreq_policy *policy) limits.max_policy_pct = 100; limits.max_perf_pct = 100; limits.max_perf = int_tofp(1); - limits.no_turbo = limits.turbo_disabled; + limits.no_turbo = 0; return 0; } limits.min_perf_pct = (policy->min * 100) / policy->cpuinfo.max_freq; @@ -760,7 +791,6 @@ static int intel_pstate_cpu_init(struct cpufreq_policy *policy) { struct cpudata *cpu; int rc; - u64 misc_en; rc = intel_pstate_init_cpu(policy->cpu); if (rc) @@ -768,12 +798,6 @@ static int intel_pstate_cpu_init(struct cpufreq_policy *policy) cpu = all_cpu_data[policy->cpu]; - rdmsrl(MSR_IA32_MISC_ENABLE, misc_en); - if (misc_en & MSR_IA32_MISC_ENABLE_TURBO_DISABLE || - cpu->pstate.max_pstate == cpu->pstate.turbo_pstate) { - limits.turbo_disabled = 1; - limits.no_turbo = 1; - } if (limits.min_perf_pct == 100 && limits.max_perf_pct == 100) policy->policy = CPUFREQ_POLICY_PERFORMANCE; else |