1 // SPDX-License-Identifier: GPL-2.0
2
3 #include <stdio.h>
4 #include <errno.h>
5 #include <stdlib.h>
6
7 #include "helpers/helpers.h"
8 #include "helpers/sysfs.h"
9
10 #if defined(__i386__) || defined(__x86_64__)
11
12 #include "cpupower_intern.h"
13
14 #define MSR_AMD_HWCR 0xc0010015
15
cpufreq_has_boost_support(unsigned int cpu,int * support,int * active,int * states)16 int cpufreq_has_boost_support(unsigned int cpu, int *support, int *active,
17 int *states)
18 {
19 int ret;
20 unsigned long long val;
21
22 *support = *active = *states = 0;
23
24 if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_CPB) {
25 *support = 1;
26
27 /* AMD Family 0x17 does not utilize PCI D18F4 like prior
28 * families and has no fixed discrete boost states but
29 * has Hardware determined variable increments instead.
30 */
31
32 if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_CPB_MSR) {
33 if (!read_msr(cpu, MSR_AMD_HWCR, &val)) {
34 if (!(val & CPUPOWER_AMD_CPBDIS))
35 *active = 1;
36 }
37 } else {
38 ret = amd_pci_get_num_boost_states(active, states);
39 if (ret)
40 return ret;
41 }
42 } else if (cpupower_cpu_info.caps & CPUPOWER_CAP_INTEL_IDA)
43 *support = *active = 1;
44 return 0;
45 }
46
cpupower_intel_get_perf_bias(unsigned int cpu)47 int cpupower_intel_get_perf_bias(unsigned int cpu)
48 {
49 char linebuf[MAX_LINE_LEN];
50 char path[SYSFS_PATH_MAX];
51 unsigned long val;
52 char *endp;
53
54 if (!(cpupower_cpu_info.caps & CPUPOWER_CAP_PERF_BIAS))
55 return -1;
56
57 snprintf(path, sizeof(path), PATH_TO_CPU "cpu%u/power/energy_perf_bias", cpu);
58
59 if (cpupower_read_sysfs(path, linebuf, MAX_LINE_LEN) == 0)
60 return -1;
61
62 val = strtol(linebuf, &endp, 0);
63 if (endp == linebuf || errno == ERANGE)
64 return -1;
65
66 return val;
67 }
68
cpupower_intel_set_perf_bias(unsigned int cpu,unsigned int val)69 int cpupower_intel_set_perf_bias(unsigned int cpu, unsigned int val)
70 {
71 char path[SYSFS_PATH_MAX];
72 char linebuf[3] = {};
73
74 if (!(cpupower_cpu_info.caps & CPUPOWER_CAP_PERF_BIAS))
75 return -1;
76
77 snprintf(path, sizeof(path), PATH_TO_CPU "cpu%u/power/energy_perf_bias", cpu);
78 snprintf(linebuf, sizeof(linebuf), "%d", val);
79
80 if (cpupower_write_sysfs(path, linebuf, 3) <= 0)
81 return -1;
82
83 return 0;
84 }
85
86 #endif /* #if defined(__i386__) || defined(__x86_64__) */
87
88 /* get_cpustate
89 *
90 * Gather the information of all online CPUs into bitmask struct
91 */
get_cpustate(void)92 void get_cpustate(void)
93 {
94 unsigned int cpu = 0;
95
96 bitmask_clearall(online_cpus);
97 bitmask_clearall(offline_cpus);
98
99 for (cpu = bitmask_first(cpus_chosen);
100 cpu <= bitmask_last(cpus_chosen); cpu++) {
101
102 if (cpupower_is_cpu_online(cpu) == 1)
103 bitmask_setbit(online_cpus, cpu);
104 else
105 bitmask_setbit(offline_cpus, cpu);
106
107 continue;
108 }
109 }
110
111 /* print_online_cpus
112 *
113 * Print the CPU numbers of all CPUs that are online currently
114 */
print_online_cpus(void)115 void print_online_cpus(void)
116 {
117 int str_len = 0;
118 char *online_cpus_str = NULL;
119
120 str_len = online_cpus->size * 5;
121 online_cpus_str = (void *)malloc(sizeof(char) * str_len);
122
123 if (!bitmask_isallclear(online_cpus)) {
124 bitmask_displaylist(online_cpus_str, str_len, online_cpus);
125 printf(_("Following CPUs are online:\n%s\n"), online_cpus_str);
126 }
127 }
128
129 /* print_offline_cpus
130 *
131 * Print the CPU numbers of all CPUs that are offline currently
132 */
print_offline_cpus(void)133 void print_offline_cpus(void)
134 {
135 int str_len = 0;
136 char *offline_cpus_str = NULL;
137
138 str_len = offline_cpus->size * 5;
139 offline_cpus_str = (void *)malloc(sizeof(char) * str_len);
140
141 if (!bitmask_isallclear(offline_cpus)) {
142 bitmask_displaylist(offline_cpus_str, str_len, offline_cpus);
143 printf(_("Following CPUs are offline:\n%s\n"), offline_cpus_str);
144 printf(_("cpupower set operation was not performed on them\n"));
145 }
146 }
147