1 // SPDX-License-Identifier: GPL-2.0
2
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 0xc0010015
17
cpufreq_has_boost_support(unsigned int cpu,int * support,int * active,int * states)18 int 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 prior
30 * families and has no fixed discrete boost states but
31 * 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
cpupower_intel_get_perf_bias(unsigned int cpu)51 int 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
cpupower_intel_set_perf_bias(unsigned int cpu,unsigned int val)73 int 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
cpupower_amd_pstate_enabled(void)90 bool cpupower_amd_pstate_enabled(void)
91 {
92 char *driver = cpufreq_get_driver(0);
93 bool ret = false;
94
95 if (!driver)
96 return ret;
97
98 if (!strcmp(driver, "amd-pstate"))
99 ret = true;
100
101 cpufreq_put_driver(driver);
102
103 return ret;
104 }
105
106 #endif /* #if defined(__i386__) || defined(__x86_64__) */
107
108 /* get_cpustate
109 *
110 * Gather the information of all online CPUs into bitmask struct
111 */
get_cpustate(void)112 void get_cpustate(void)
113 {
114 unsigned int cpu = 0;
115
116 bitmask_clearall(online_cpus);
117 bitmask_clearall(offline_cpus);
118
119 for (cpu = bitmask_first(cpus_chosen);
120 cpu <= bitmask_last(cpus_chosen); cpu++) {
121
122 if (cpupower_is_cpu_online(cpu) == 1)
123 bitmask_setbit(online_cpus, cpu);
124 else
125 bitmask_setbit(offline_cpus, cpu);
126
127 continue;
128 }
129 }
130
131 /* print_online_cpus
132 *
133 * Print the CPU numbers of all CPUs that are online currently
134 */
print_online_cpus(void)135 void print_online_cpus(void)
136 {
137 int str_len = 0;
138 char *online_cpus_str = NULL;
139
140 str_len = online_cpus->size * 5;
141 online_cpus_str = (void *)malloc(sizeof(char) * str_len);
142
143 if (!bitmask_isallclear(online_cpus)) {
144 bitmask_displaylist(online_cpus_str, str_len, online_cpus);
145 printf(_("Following CPUs are online:\n%s\n"), online_cpus_str);
146 }
147 }
148
149 /* print_offline_cpus
150 *
151 * Print the CPU numbers of all CPUs that are offline currently
152 */
print_offline_cpus(void)153 void print_offline_cpus(void)
154 {
155 int str_len = 0;
156 char *offline_cpus_str = NULL;
157
158 str_len = offline_cpus->size * 5;
159 offline_cpus_str = (void *)malloc(sizeof(char) * str_len);
160
161 if (!bitmask_isallclear(offline_cpus)) {
162 bitmask_displaylist(offline_cpus_str, str_len, offline_cpus);
163 printf(_("Following CPUs are offline:\n%s\n"), offline_cpus_str);
164 printf(_("cpupower set operation was not performed on them\n"));
165 }
166 }
167
168 /*
169 * print_speed
170 *
171 * Print the exact CPU frequency with appropriate unit
172 */
print_speed(unsigned long speed,int no_rounding)173 void print_speed(unsigned long speed, int no_rounding)
174 {
175 unsigned long tmp;
176
177 if (no_rounding) {
178 if (speed > 1000000)
179 printf("%u.%06u GHz", ((unsigned int)speed / 1000000),
180 ((unsigned int)speed % 1000000));
181 else if (speed > 1000)
182 printf("%u.%03u MHz", ((unsigned int)speed / 1000),
183 (unsigned int)(speed % 1000));
184 else
185 printf("%lu kHz", speed);
186 } else {
187 if (speed > 1000000) {
188 tmp = speed % 10000;
189 if (tmp >= 5000)
190 speed += 10000;
191 printf("%u.%02u GHz", ((unsigned int)speed / 1000000),
192 ((unsigned int)(speed % 1000000) / 10000));
193 } else if (speed > 100000) {
194 tmp = speed % 1000;
195 if (tmp >= 500)
196 speed += 1000;
197 printf("%u MHz", ((unsigned int)speed / 1000));
198 } else if (speed > 1000) {
199 tmp = speed % 100;
200 if (tmp >= 50)
201 speed += 100;
202 printf("%u.%01u MHz", ((unsigned int)speed / 1000),
203 ((unsigned int)(speed % 1000) / 100));
204 }
205 }
206 }
207