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 
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 
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 
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  */
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  */
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  */
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