diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c index 1e4fbb002a31..a5facc6cad16 100644 --- a/drivers/cpufreq/acpi-cpufreq.c +++ b/drivers/cpufreq/acpi-cpufreq.c @@ -26,6 +26,7 @@ #include #include +#include #include #include @@ -628,11 +629,57 @@ static int acpi_cpufreq_blacklist(struct cpuinfo_x86 *c) } #endif +#ifdef CONFIG_ACPI_CPPC_LIB +static bool amd_max_boost(unsigned int max_freq, + unsigned int *max_boost) +{ + struct cppc_perf_caps perf_caps; + u64 highest_perf, nominal_perf, perf_ratio; + int ret; + + ret = cppc_get_perf_caps(0, &perf_caps); + if (ret) { + pr_debug("Could not retrieve perf counters (%d)\n", ret); + return false; + } + + highest_perf = perf_caps.highest_perf; + nominal_perf = perf_caps.nominal_perf; + + if (!highest_perf || !nominal_perf) { + pr_debug("Could not retrieve highest or nominal performance\n"); + return false; + } + + perf_ratio = div_u64(highest_perf * SCHED_CAPACITY_SCALE, nominal_perf); + if (perf_ratio <= SCHED_CAPACITY_SCALE) { + pr_debug("Either perf_ratio is 0, or nominal >= highest performance\n"); + return false; + } + + *max_boost = max_freq * perf_ratio >> SCHED_CAPACITY_SHIFT; + if (!*max_boost) { + pr_debug("max_boost seems to be zero\n"); + return false; + } + + return true; +} +#else +static bool amd_max_boost(unsigned int max_freq, + unsigned int *max_boost) +{ + return false; +} +#endif + static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy) { unsigned int i; unsigned int valid_states = 0; unsigned int cpu = policy->cpu; + unsigned int freq, max_freq = 0; + unsigned int max_boost; struct acpi_cpufreq_data *data; unsigned int result = 0; struct cpuinfo_x86 *c = &cpu_data(policy->cpu); @@ -779,15 +826,25 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy) freq_table[valid_states-1].frequency / 1000) continue; + freq = perf->states[i].core_frequency * 1000; freq_table[valid_states].driver_data = i; - freq_table[valid_states].frequency = - perf->states[i].core_frequency * 1000; + freq_table[valid_states].frequency = freq; + + if (freq > max_freq) + max_freq = freq; + valid_states++; } freq_table[valid_states].frequency = CPUFREQ_TABLE_END; policy->freq_table = freq_table; perf->state = 0; + if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD && + amd_max_boost(max_freq, &max_boost)) { + policy->cpuinfo.max_boost = max_boost; + static_branch_enable(&cpufreq_amd_max_boost); + } + switch (perf->control_register.space_id) { case ACPI_ADR_SPACE_SYSTEM_IO: /* diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index d0a3525ce27f..b96677f6b57e 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -2721,6 +2721,9 @@ int cpufreq_boost_enabled(void) } EXPORT_SYMBOL_GPL(cpufreq_boost_enabled); +DEFINE_STATIC_KEY_FALSE(cpufreq_amd_max_boost); +EXPORT_SYMBOL_GPL(cpufreq_amd_max_boost); + /********************************************************************* * REGISTER / UNREGISTER CPUFREQ DRIVER * *********************************************************************/ diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h index 9c8b7437b6cd..341cac76d254 100644 --- a/include/linux/cpufreq.h +++ b/include/linux/cpufreq.h @@ -40,9 +40,14 @@ enum cpufreq_table_sorting { CPUFREQ_TABLE_SORTED_DESCENDING }; +DECLARE_STATIC_KEY_FALSE(cpufreq_amd_max_boost); + +#define cpufreq_driver_has_max_boost() static_branch_unlikely(&cpufreq_amd_max_boost) + struct cpufreq_cpuinfo { unsigned int max_freq; unsigned int min_freq; + unsigned int max_boost; /* in 10^(-9) s = nanoseconds */ unsigned int transition_latency; diff --git a/kernel/sched/cpufreq_schedutil.c b/kernel/sched/cpufreq_schedutil.c index 6931f0cdeb80..541f3db3f576 100644 --- a/kernel/sched/cpufreq_schedutil.c +++ b/kernel/sched/cpufreq_schedutil.c @@ -159,8 +159,12 @@ static unsigned int get_next_freq(struct sugov_policy *sg_policy, unsigned long util, unsigned long max) { struct cpufreq_policy *policy = sg_policy->policy; - unsigned int freq = arch_scale_freq_invariant() ? - policy->cpuinfo.max_freq : policy->cur; + unsigned int freq, max_freq; + + max_freq = cpufreq_driver_has_max_boost() ? + policy->cpuinfo.max_boost : policy->cpuinfo.max_freq; + + freq = arch_scale_freq_invariant() ? max_freq : policy->cur; freq = map_util_freq(util, freq, max);