262 lines · c
1// SPDX-License-Identifier: GPL-2.02 3#include <stdio.h>4#include <errno.h>5#include <stdlib.h>6#include <string.h>7 8#include "helpers/helpers.h"9#include "helpers/sysfs.h"10#include "cpufreq.h"11 12#if defined(__i386__) || defined(__x86_64__)13 14#include "cpupower_intern.h"15 16#define MSR_AMD_HWCR 0xc001001517 18int cpufreq_has_boost_support(unsigned int cpu, int *support, int *active,19 int *states)20{21 int ret;22 unsigned long long val;23 24 *support = *active = *states = 0;25 26 if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_CPB) {27 *support = 1;28 29 /* AMD Family 0x17 does not utilize PCI D18F4 like prior30 * families and has no fixed discrete boost states but31 * has Hardware determined variable increments instead.32 */33 34 if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_CPB_MSR) {35 if (!read_msr(cpu, MSR_AMD_HWCR, &val)) {36 if (!(val & CPUPOWER_AMD_CPBDIS))37 *active = 1;38 }39 } else {40 ret = amd_pci_get_num_boost_states(active, states);41 if (ret)42 return ret;43 }44 } else if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_PSTATE) {45 amd_pstate_boost_init(cpu, support, active);46 } else if (cpupower_cpu_info.caps & CPUPOWER_CAP_INTEL_IDA)47 *support = *active = 1;48 return 0;49}50 51int cpupower_intel_get_perf_bias(unsigned int cpu)52{53 char linebuf[MAX_LINE_LEN];54 char path[SYSFS_PATH_MAX];55 unsigned long val;56 char *endp;57 58 if (!(cpupower_cpu_info.caps & CPUPOWER_CAP_PERF_BIAS))59 return -1;60 61 snprintf(path, sizeof(path), PATH_TO_CPU "cpu%u/power/energy_perf_bias", cpu);62 63 if (cpupower_read_sysfs(path, linebuf, MAX_LINE_LEN) == 0)64 return -1;65 66 val = strtol(linebuf, &endp, 0);67 if (endp == linebuf || errno == ERANGE)68 return -1;69 70 return val;71}72 73int cpupower_intel_set_perf_bias(unsigned int cpu, unsigned int val)74{75 char path[SYSFS_PATH_MAX];76 char linebuf[3] = {};77 78 if (!(cpupower_cpu_info.caps & CPUPOWER_CAP_PERF_BIAS))79 return -1;80 81 snprintf(path, sizeof(path), PATH_TO_CPU "cpu%u/power/energy_perf_bias", cpu);82 snprintf(linebuf, sizeof(linebuf), "%d", val);83 84 if (cpupower_write_sysfs(path, linebuf, 3) <= 0)85 return -1;86 87 return 0;88}89 90int cpupower_set_epp(unsigned int cpu, char *epp)91{92 char path[SYSFS_PATH_MAX];93 char linebuf[30] = {};94 95 snprintf(path, sizeof(path),96 PATH_TO_CPU "cpu%u/cpufreq/energy_performance_preference", cpu);97 98 if (!is_valid_path(path))99 return -1;100 101 snprintf(linebuf, sizeof(linebuf), "%s", epp);102 103 if (cpupower_write_sysfs(path, linebuf, 30) <= 0)104 return -1;105 106 return 0;107}108 109int cpupower_set_amd_pstate_mode(char *mode)110{111 char path[SYSFS_PATH_MAX];112 char linebuf[20] = {};113 114 snprintf(path, sizeof(path), PATH_TO_CPU "amd_pstate/status");115 116 if (!is_valid_path(path))117 return -1;118 119 snprintf(linebuf, sizeof(linebuf), "%s\n", mode);120 121 if (cpupower_write_sysfs(path, linebuf, 20) <= 0)122 return -1;123 124 return 0;125}126 127int cpupower_set_turbo_boost(int turbo_boost)128{129 char path[SYSFS_PATH_MAX];130 char linebuf[2] = {};131 132 snprintf(path, sizeof(path), PATH_TO_CPU "cpufreq/boost");133 134 if (!is_valid_path(path))135 return -1;136 137 snprintf(linebuf, sizeof(linebuf), "%d", turbo_boost);138 139 if (cpupower_write_sysfs(path, linebuf, 2) <= 0)140 return -1;141 142 return 0;143}144 145bool cpupower_amd_pstate_enabled(void)146{147 char *driver = cpufreq_get_driver(0);148 bool ret = false;149 150 if (!driver)151 return ret;152 153 if (!strncmp(driver, "amd", 3))154 ret = true;155 156 cpufreq_put_driver(driver);157 158 return ret;159}160 161#endif /* #if defined(__i386__) || defined(__x86_64__) */162 163/* get_cpustate164 *165 * Gather the information of all online CPUs into bitmask struct166 */167void get_cpustate(void)168{169 unsigned int cpu = 0;170 171 bitmask_clearall(online_cpus);172 bitmask_clearall(offline_cpus);173 174 for (cpu = bitmask_first(cpus_chosen);175 cpu <= bitmask_last(cpus_chosen); cpu++) {176 177 if (cpupower_is_cpu_online(cpu) == 1)178 bitmask_setbit(online_cpus, cpu);179 else180 bitmask_setbit(offline_cpus, cpu);181 182 continue;183 }184}185 186/* print_online_cpus187 *188 * Print the CPU numbers of all CPUs that are online currently189 */190void print_online_cpus(void)191{192 int str_len = 0;193 char *online_cpus_str = NULL;194 195 str_len = online_cpus->size * 5;196 online_cpus_str = (void *)malloc(sizeof(char) * str_len);197 198 if (!bitmask_isallclear(online_cpus)) {199 bitmask_displaylist(online_cpus_str, str_len, online_cpus);200 printf(_("Following CPUs are online:\n%s\n"), online_cpus_str);201 }202}203 204/* print_offline_cpus205 *206 * Print the CPU numbers of all CPUs that are offline currently207 */208void print_offline_cpus(void)209{210 int str_len = 0;211 char *offline_cpus_str = NULL;212 213 str_len = offline_cpus->size * 5;214 offline_cpus_str = (void *)malloc(sizeof(char) * str_len);215 216 if (!bitmask_isallclear(offline_cpus)) {217 bitmask_displaylist(offline_cpus_str, str_len, offline_cpus);218 printf(_("Following CPUs are offline:\n%s\n"), offline_cpus_str);219 printf(_("cpupower set operation was not performed on them\n"));220 }221}222 223/*224 * print_speed225 *226 * Print the exact CPU frequency with appropriate unit227 */228void print_speed(unsigned long speed, int no_rounding)229{230 unsigned long tmp;231 232 if (no_rounding) {233 if (speed > 1000000)234 printf("%u.%06u GHz", ((unsigned int)speed / 1000000),235 ((unsigned int)speed % 1000000));236 else if (speed > 1000)237 printf("%u.%03u MHz", ((unsigned int)speed / 1000),238 (unsigned int)(speed % 1000));239 else240 printf("%lu kHz", speed);241 } else {242 if (speed > 1000000) {243 tmp = speed % 10000;244 if (tmp >= 5000)245 speed += 10000;246 printf("%u.%02u GHz", ((unsigned int)speed / 1000000),247 ((unsigned int)(speed % 1000000) / 10000));248 } else if (speed > 100000) {249 tmp = speed % 1000;250 if (tmp >= 500)251 speed += 1000;252 printf("%u MHz", ((unsigned int)speed / 1000));253 } else if (speed > 1000) {254 tmp = speed % 100;255 if (tmp >= 50)256 speed += 100;257 printf("%u.%01u MHz", ((unsigned int)speed / 1000),258 ((unsigned int)(speed % 1000) / 100));259 }260 }261}262