diff options
Diffstat (limited to 'drivers/cpufreq/acpi-cpufreq.c')
| -rw-r--r-- | drivers/cpufreq/acpi-cpufreq.c | 66 |
1 files changed, 40 insertions, 26 deletions
diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c index 37f1cdf46d29..463b69a2dff5 100644 --- a/drivers/cpufreq/acpi-cpufreq.c +++ b/drivers/cpufreq/acpi-cpufreq.c @@ -50,8 +50,6 @@ enum { #define AMD_MSR_RANGE (0x7) #define HYGON_MSR_RANGE (0x7) -#define MSR_K7_HWCR_CPB_DIS (1ULL << 25) - struct acpi_cpufreq_data { unsigned int resume; unsigned int cpu_feature; @@ -75,20 +73,17 @@ static unsigned int acpi_pstate_strict; static bool boost_state(unsigned int cpu) { - u32 lo, hi; u64 msr; switch (boot_cpu_data.x86_vendor) { case X86_VENDOR_INTEL: case X86_VENDOR_CENTAUR: case X86_VENDOR_ZHAOXIN: - rdmsr_on_cpu(cpu, MSR_IA32_MISC_ENABLE, &lo, &hi); - msr = lo | ((u64)hi << 32); + rdmsrl_on_cpu(cpu, MSR_IA32_MISC_ENABLE, &msr); return !(msr & MSR_IA32_MISC_ENABLE_TURBO_DISABLE); case X86_VENDOR_HYGON: case X86_VENDOR_AMD: - rdmsr_on_cpu(cpu, MSR_K7_HWCR, &lo, &hi); - msr = lo | ((u64)hi << 32); + rdmsrl_on_cpu(cpu, MSR_K7_HWCR, &msr); return !(msr & MSR_K7_HWCR_CPB_DIS); } return false; @@ -628,7 +623,14 @@ static int acpi_cpufreq_blacklist(struct cpuinfo_x86 *c) #endif #ifdef CONFIG_ACPI_CPPC_LIB -static u64 get_max_boost_ratio(unsigned int cpu) +/* + * get_max_boost_ratio: Computes the max_boost_ratio as the ratio + * between the highest_perf and the nominal_perf. + * + * Returns the max_boost_ratio for @cpu. Returns the CPPC nominal + * frequency via @nominal_freq if it is non-NULL pointer. + */ +static u64 get_max_boost_ratio(unsigned int cpu, u64 *nominal_freq) { struct cppc_perf_caps perf_caps; u64 highest_perf, nominal_perf; @@ -644,13 +646,22 @@ static u64 get_max_boost_ratio(unsigned int cpu) return 0; } - if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD) - highest_perf = amd_get_highest_perf(); - else + if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD) { + ret = amd_get_boost_ratio_numerator(cpu, &highest_perf); + if (ret) { + pr_debug("CPU%d: Unable to get boost ratio numerator (%d)\n", + cpu, ret); + return 0; + } + } else { highest_perf = perf_caps.highest_perf; + } nominal_perf = perf_caps.nominal_perf; + if (nominal_freq) + *nominal_freq = perf_caps.nominal_freq; + if (!highest_perf || !nominal_perf) { pr_debug("CPU%d: highest or nominal performance missing\n", cpu); return 0; @@ -663,8 +674,12 @@ static u64 get_max_boost_ratio(unsigned int cpu) return div_u64(highest_perf << SCHED_CAPACITY_SHIFT, nominal_perf); } + #else -static inline u64 get_max_boost_ratio(unsigned int cpu) { return 0; } +static inline u64 get_max_boost_ratio(unsigned int cpu, u64 *nominal_freq) +{ + return 0; +} #endif static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy) @@ -674,9 +689,9 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy) struct acpi_cpufreq_data *data; unsigned int cpu = policy->cpu; struct cpuinfo_x86 *c = &cpu_data(cpu); + u64 max_boost_ratio, nominal_freq = 0; unsigned int valid_states = 0; unsigned int result = 0; - u64 max_boost_ratio; unsigned int i; #ifdef CONFIG_SMP static int blacklisted; @@ -826,16 +841,20 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy) } freq_table[valid_states].frequency = CPUFREQ_TABLE_END; - max_boost_ratio = get_max_boost_ratio(cpu); + max_boost_ratio = get_max_boost_ratio(cpu, &nominal_freq); if (max_boost_ratio) { - unsigned int freq = freq_table[0].frequency; + unsigned int freq = nominal_freq; /* - * Because the loop above sorts the freq_table entries in the - * descending order, freq is the maximum frequency in the table. - * Assume that it corresponds to the CPPC nominal frequency and - * use it to set cpuinfo.max_freq. + * The loop above sorts the freq_table entries in the + * descending order. If ACPI CPPC has not advertised + * the nominal frequency (this is possible in CPPC + * revisions prior to 3), then use the first entry in + * the pstate table as a proxy for nominal frequency. */ + if (!freq) + freq = freq_table[0].frequency; + policy->cpuinfo.max_freq = freq * max_boost_ratio >> SCHED_CAPACITY_SHIFT; } else { /* @@ -890,9 +909,6 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy) if (perf->states[0].core_frequency * 1000 != freq_table[0].frequency) pr_warn(FW_WARN "P-state 0 is not max freq\n"); - if (acpi_cpufreq_driver.set_boost) - set_boost(policy, acpi_cpufreq_driver.boost_enabled); - return result; err_unreg: @@ -906,7 +922,7 @@ err_free: return result; } -static int acpi_cpufreq_cpu_exit(struct cpufreq_policy *policy) +static void acpi_cpufreq_cpu_exit(struct cpufreq_policy *policy) { struct acpi_cpufreq_data *data = policy->driver_data; @@ -919,8 +935,6 @@ static int acpi_cpufreq_cpu_exit(struct cpufreq_policy *policy) free_cpumask_var(data->freqdomain_cpus); kfree(policy->freq_table); kfree(data); - - return 0; } static int acpi_cpufreq_resume(struct cpufreq_policy *policy) @@ -1024,7 +1038,7 @@ static struct platform_driver acpi_cpufreq_platdrv = { .driver = { .name = "acpi-cpufreq", }, - .remove_new = acpi_cpufreq_remove, + .remove = acpi_cpufreq_remove, }; static int __init acpi_cpufreq_init(void) |