diff options
Diffstat (limited to 'drivers/cpufreq')
| -rw-r--r-- | drivers/cpufreq/intel_pstate.c | 28 |
1 files changed, 15 insertions, 13 deletions
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index e5ef51d7be4e..7159dbde0160 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -54,6 +54,8 @@ #define EXT_BITS 6 #define EXT_FRAC_BITS (EXT_BITS + FRAC_BITS) +#define fp_ext_toint(X) ((X) >> EXT_FRAC_BITS) +#define int_ext_tofp(X) ((int64_t)(X) << EXT_FRAC_BITS) static inline int32_t mul_fp(int32_t x, int32_t y) { @@ -351,9 +353,9 @@ static struct perf_limits performance_limits = { .no_turbo = 0, .turbo_disabled = 0, .max_perf_pct = 100, - .max_perf = int_tofp(1), + .max_perf = int_ext_tofp(1), .min_perf_pct = 100, - .min_perf = int_tofp(1), + .min_perf = int_ext_tofp(1), .max_policy_pct = 100, .max_sysfs_pct = 100, .min_policy_pct = 0, @@ -364,7 +366,7 @@ static struct perf_limits powersave_limits = { .no_turbo = 0, .turbo_disabled = 0, .max_perf_pct = 100, - .max_perf = int_tofp(1), + .max_perf = int_ext_tofp(1), .min_perf_pct = 0, .min_perf = 0, .max_policy_pct = 100, @@ -776,7 +778,7 @@ static ssize_t store_max_perf_pct(struct kobject *a, struct attribute *b, limits->max_perf_pct); limits->max_perf_pct = max(limits->min_perf_pct, limits->max_perf_pct); - limits->max_perf = div_fp(limits->max_perf_pct, 100); + limits->max_perf = div_ext_fp(limits->max_perf_pct, 100); mutex_unlock(&intel_pstate_limits_lock); @@ -804,7 +806,7 @@ static ssize_t store_min_perf_pct(struct kobject *a, struct attribute *b, limits->min_perf_pct); limits->min_perf_pct = min(limits->max_perf_pct, limits->min_perf_pct); - limits->min_perf = div_fp(limits->min_perf_pct, 100); + limits->min_perf = div_ext_fp(limits->min_perf_pct, 100); mutex_unlock(&intel_pstate_limits_lock); @@ -1189,11 +1191,11 @@ static void intel_pstate_get_min_max(struct cpudata *cpu, int *min, int *max) * policy, or by cpu specific default values determined through * experimentation. */ - max_perf_adj = fp_toint(max_perf * perf_limits->max_perf); + max_perf_adj = fp_ext_toint(max_perf * perf_limits->max_perf); *max = clamp_t(int, max_perf_adj, cpu->pstate.min_pstate, cpu->pstate.turbo_pstate); - min_perf = fp_toint(max_perf * perf_limits->min_perf); + min_perf = fp_ext_toint(max_perf * perf_limits->min_perf); *min = clamp_t(int, min_perf, cpu->pstate.min_pstate, max_perf); } @@ -1561,9 +1563,9 @@ static void intel_pstate_set_performance_limits(struct perf_limits *limits) limits->no_turbo = 0; limits->turbo_disabled = 0; limits->max_perf_pct = 100; - limits->max_perf = int_tofp(1); + limits->max_perf = int_ext_tofp(1); limits->min_perf_pct = 100; - limits->min_perf = int_tofp(1); + limits->min_perf = int_ext_tofp(1); limits->max_policy_pct = 100; limits->max_sysfs_pct = 100; limits->min_policy_pct = 0; @@ -1602,10 +1604,10 @@ static void intel_pstate_update_perf_limits(struct cpufreq_policy *policy, /* Make sure min_perf_pct <= max_perf_pct */ limits->min_perf_pct = min(limits->max_perf_pct, limits->min_perf_pct); - limits->min_perf = div_fp(limits->min_perf_pct, 100); - limits->max_perf = div_fp(limits->max_perf_pct, 100); - limits->max_perf = round_up(limits->max_perf, FRAC_BITS); - limits->min_perf = round_up(limits->min_perf, FRAC_BITS); + 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); mutex_unlock(&intel_pstate_limits_lock); |