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linux-cpupower-5.18-rc1 

This cpupower update for Linux 5.18-rc1 adds AMD P-State Support to
 cpupower tool. AMD P-State kernel support went into 5.17-rc1.
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Merge tag 'linux-cpupower-5.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux

Pull cpupower utility updates for 5.18-rc1 from Shuah Khan:

"This cpupower update for Linux 5.18-rc1 adds AMD P-State Support to
 cpupower tool. AMD P-State kernel support went into 5.17-rc1."

* tag 'linux-cpupower-5.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux:
  cpupower: Add "perf" option to print AMD P-State information
  cpupower: Add function to print AMD P-State performance capabilities
  cpupower: Move print_speed function into misc helper
  cpupower: Enable boost state support for AMD P-State module
  cpupower: Add AMD P-State sysfs definition and access helper
  cpupower: Introduce ACPI CPPC library
  cpupower: Add the function to get the sysfs value from specific table
  cpupower: Initial AMD P-State capability
  cpupower: Add the function to check AMD P-State enabled
  cpupower: Add AMD P-State capability flag
This commit is contained in:
Rafael J. Wysocki 2022-03-01 18:47:09 +01:00
parent caa28245da 8382dce5e4
commit 4a49db7b0a
11 changed files with 321 additions and 62 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
tools/power/cpupower/Makefile
View File

@ -143,9 +143,9 @@ UTIL_HEADERS = utils/helpers/helpers.h utils/idle_monitor/cpupower-monitor.h \
utils/helpers/bitmask.h \
utils/idle_monitor/idle_monitors.h utils/idle_monitor/idle_monitors.def
LIB_HEADERS = lib/cpufreq.h lib/cpupower.h lib/cpuidle.h
LIB_SRC = lib/cpufreq.c lib/cpupower.c lib/cpuidle.c
LIB_OBJS = lib/cpufreq.o lib/cpupower.o lib/cpuidle.o
LIB_HEADERS = lib/cpufreq.h lib/cpupower.h lib/cpuidle.h lib/acpi_cppc.h
LIB_SRC = lib/cpufreq.c lib/cpupower.c lib/cpuidle.c lib/acpi_cppc.c
LIB_OBJS = lib/cpufreq.o lib/cpupower.o lib/cpuidle.o lib/acpi_cppc.o
LIB_OBJS := $(addprefix $(OUTPUT),$(LIB_OBJS))
override CFLAGS += -pipe

59
tools/power/cpupower/lib/acpi_cppc.c Normal file
View File

@ -0,0 +1,59 @@
// SPDX-License-Identifier: GPL-2.0-only
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include "cpupower_intern.h"
#include "acpi_cppc.h"
/* ACPI CPPC sysfs access ***********************************************/
static int acpi_cppc_read_file(unsigned int cpu, const char *fname,
char *buf, size_t buflen)
{
char path[SYSFS_PATH_MAX];
snprintf(path, sizeof(path), PATH_TO_CPU "cpu%u/acpi_cppc/%s",
cpu, fname);
return cpupower_read_sysfs(path, buf, buflen);
}
static const char * const acpi_cppc_value_files[] = {
[HIGHEST_PERF] = "highest_perf",
[LOWEST_PERF] = "lowest_perf",
[NOMINAL_PERF] = "nominal_perf",
[LOWEST_NONLINEAR_PERF] = "lowest_nonlinear_perf",
[LOWEST_FREQ] = "lowest_freq",
[NOMINAL_FREQ] = "nominal_freq",
[REFERENCE_PERF] = "reference_perf",
[WRAPAROUND_TIME] = "wraparound_time"
};
unsigned long acpi_cppc_get_data(unsigned int cpu, enum acpi_cppc_value which)
{
unsigned long long value;
unsigned int len;
char linebuf[MAX_LINE_LEN];
char *endp;
if (which >= MAX_CPPC_VALUE_FILES)
return 0;
len = acpi_cppc_read_file(cpu, acpi_cppc_value_files[which],
linebuf, sizeof(linebuf));
if (len == 0)
return 0;
value = strtoull(linebuf, &endp, 0);
if (endp == linebuf || errno == ERANGE)
return 0;
return value;
}

21
tools/power/cpupower/lib/acpi_cppc.h Normal file
View File

@ -0,0 +1,21 @@
/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef __ACPI_CPPC_H__
#define __ACPI_CPPC_H__
enum acpi_cppc_value {
HIGHEST_PERF,
LOWEST_PERF,
NOMINAL_PERF,
LOWEST_NONLINEAR_PERF,
LOWEST_FREQ,
NOMINAL_FREQ,
REFERENCE_PERF,
WRAPAROUND_TIME,
MAX_CPPC_VALUE_FILES
};
unsigned long acpi_cppc_get_data(unsigned int cpu,
enum acpi_cppc_value which);
#endif /* _ACPI_CPPC_H */

23
tools/power/cpupower/lib/cpufreq.c
View File

@ -83,20 +83,21 @@ static const char *cpufreq_value_files[MAX_CPUFREQ_VALUE_READ_FILES] = {
[STATS_NUM_TRANSITIONS] = "stats/total_trans"
};
static unsigned long sysfs_cpufreq_get_one_value(unsigned int cpu,
enum cpufreq_value which)
unsigned long cpufreq_get_sysfs_value_from_table(unsigned int cpu,
const char **table,
unsigned int index,
unsigned int size)
{
unsigned long value;
unsigned int len;
char linebuf[MAX_LINE_LEN];
char *endp;
if (which >= MAX_CPUFREQ_VALUE_READ_FILES)
if (!table || index >= size || !table[index])
return 0;
len = sysfs_cpufreq_read_file(cpu, cpufreq_value_files[which],
linebuf, sizeof(linebuf));
len = sysfs_cpufreq_read_file(cpu, table[index], linebuf,
sizeof(linebuf));
if (len == 0)
return 0;
@ -109,6 +110,14 @@ static unsigned long sysfs_cpufreq_get_one_value(unsigned int cpu,
return value;
}
static unsigned long sysfs_cpufreq_get_one_value(unsigned int cpu,
enum cpufreq_value which)
{
return cpufreq_get_sysfs_value_from_table(cpu, cpufreq_value_files,
which,
MAX_CPUFREQ_VALUE_READ_FILES);
}
/* read access to files which contain one string */
enum cpufreq_string {
@ -124,7 +133,7 @@ static const char *cpufreq_string_files[MAX_CPUFREQ_STRING_FILES] = {
static char *sysfs_cpufreq_get_one_string(unsigned int cpu,
enum cpufreq_string which)
enum cpufreq_string which)
{
char linebuf[MAX_LINE_LEN];
char *result;

12
tools/power/cpupower/lib/cpufreq.h
View File

@ -203,6 +203,18 @@ int cpufreq_modify_policy_governor(unsigned int cpu, char *governor);
int cpufreq_set_frequency(unsigned int cpu,
unsigned long target_frequency);
/*
* get the sysfs value from specific table
*
* Read the value with the sysfs file name from specific table. Does
* only work if the cpufreq driver has the specific sysfs interfaces.
*/
unsigned long cpufreq_get_sysfs_value_from_table(unsigned int cpu,
const char **table,
unsigned int index,
unsigned int size);
#ifdef __cplusplus
}
#endif

3
tools/power/cpupower/man/cpupower-frequency-info.1
View File

@ -53,6 +53,9 @@ human\-readable output for the \-f, \-w, \-s and \-y parameters.
\fB\-n\fR \fB\-\-no-rounding\fR
Output frequencies and latencies without rounding off values.
.TP
\fB\-c\fR \fB\-\-perf\fR
Get performances and frequencies capabilities of CPPC, by reading it from hardware (only available on the hardware with CPPC).
.TP
.SH "REMARKS"
.LP
By default only values of core zero are displayed. How to display settings of

87
tools/power/cpupower/utils/cpufreq-info.c
View File

@ -84,43 +84,6 @@ static void proc_cpufreq_output(void)
}
static int no_rounding;
static void print_speed(unsigned long speed)
{
unsigned long tmp;
if (no_rounding) {
if (speed > 1000000)
printf("%u.%06u GHz", ((unsigned int) speed/1000000),
((unsigned int) speed%1000000));
else if (speed > 1000)
printf("%u.%03u MHz", ((unsigned int) speed/1000),
(unsigned int) (speed%1000));
else
printf("%lu kHz", speed);
} else {
if (speed > 1000000) {
tmp = speed%10000;
if (tmp >= 5000)
speed += 10000;
printf("%u.%02u GHz", ((unsigned int) speed/1000000),
((unsigned int) (speed%1000000)/10000));
} else if (speed > 100000) {
tmp = speed%1000;
if (tmp >= 500)
speed += 1000;
printf("%u MHz", ((unsigned int) speed/1000));
} else if (speed > 1000) {
tmp = speed%100;
if (tmp >= 50)
speed += 100;
printf("%u.%01u MHz", ((unsigned int) speed/1000),
((unsigned int) (speed%1000)/100));
}
}
return;
}
static void print_duration(unsigned long duration)
{
unsigned long tmp;
@ -183,9 +146,12 @@ static int get_boost_mode_x86(unsigned int cpu)
printf(_(" Supported: %s\n"), support ? _("yes") : _("no"));
printf(_(" Active: %s\n"), active ? _("yes") : _("no"));
if ((cpupower_cpu_info.vendor == X86_VENDOR_AMD &&
cpupower_cpu_info.family >= 0x10) ||
cpupower_cpu_info.vendor == X86_VENDOR_HYGON) {
if (cpupower_cpu_info.vendor == X86_VENDOR_AMD &&
cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_PSTATE) {
return 0;
} else if ((cpupower_cpu_info.vendor == X86_VENDOR_AMD &&
cpupower_cpu_info.family >= 0x10) ||
cpupower_cpu_info.vendor == X86_VENDOR_HYGON) {
ret = decode_pstates(cpu, b_states, pstates, &pstate_no);
if (ret)
return ret;
@ -254,11 +220,11 @@ static int get_boost_mode(unsigned int cpu)
if (freqs) {
printf(_(" boost frequency steps: "));
while (freqs->next) {
print_speed(freqs->frequency);
print_speed(freqs->frequency, no_rounding);
printf(", ");
freqs = freqs->next;
}
print_speed(freqs->frequency);
print_speed(freqs->frequency, no_rounding);
printf("\n");
cpufreq_put_available_frequencies(freqs);
}
@ -277,7 +243,7 @@ static int get_freq_kernel(unsigned int cpu, unsigned int human)
return -EINVAL;
}
if (human) {
print_speed(freq);
print_speed(freq, no_rounding);
} else
printf("%lu", freq);
printf(_(" (asserted by call to kernel)\n"));
@ -296,7 +262,7 @@ static int get_freq_hardware(unsigned int cpu, unsigned int human)
return -EINVAL;
}
if (human) {
print_speed(freq);
print_speed(freq, no_rounding);
} else
printf("%lu", freq);
printf(_(" (asserted by call to hardware)\n"));
@ -316,9 +282,9 @@ static int get_hardware_limits(unsigned int cpu, unsigned int human)
if (human) {
printf(_(" hardware limits: "));
print_speed(min);
print_speed(min, no_rounding);
printf(" - ");
print_speed(max);
print_speed(max, no_rounding);
printf("\n");
} else {
printf("%lu %lu\n", min, max);
@ -350,9 +316,9 @@ static int get_policy(unsigned int cpu)
return -EINVAL;
}
printf(_(" current policy: frequency should be within "));
print_speed(policy->min);
print_speed(policy->min, no_rounding);
printf(_(" and "));
print_speed(policy->max);
print_speed(policy->max, no_rounding);
printf(".\n ");
printf(_("The governor \"%s\" may decide which speed to use\n"
@ -436,7 +402,7 @@ static int get_freq_stats(unsigned int cpu, unsigned int human)
struct cpufreq_stats *stats = cpufreq_get_stats(cpu, &total_time);
while (stats) {
if (human) {
print_speed(stats->frequency);
print_speed(stats->frequency, no_rounding);
printf(":%.2f%%",
(100.0 * stats->time_in_state) / total_time);
} else
@ -472,6 +438,17 @@ static int get_latency(unsigned int cpu, unsigned int human)
return 0;
}
/* --performance / -c */
static int get_perf_cap(unsigned int cpu)
{
if (cpupower_cpu_info.vendor == X86_VENDOR_AMD &&
cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_PSTATE)
amd_pstate_show_perf_and_freq(cpu, no_rounding);
return 0;
}
static void debug_output_one(unsigned int cpu)
{
struct cpufreq_available_frequencies *freqs;
@ -486,11 +463,11 @@ static void debug_output_one(unsigned int cpu)
if (freqs) {
printf(_(" available frequency steps: "));
while (freqs->next) {
print_speed(freqs->frequency);
print_speed(freqs->frequency, no_rounding);
printf(", ");
freqs = freqs->next;
}
print_speed(freqs->frequency);
print_speed(freqs->frequency, no_rounding);
printf("\n");
cpufreq_put_available_frequencies(freqs);
}
@ -500,6 +477,7 @@ static void debug_output_one(unsigned int cpu)
if (get_freq_hardware(cpu, 1) < 0)
get_freq_kernel(cpu, 1);
get_boost_mode(cpu);
get_perf_cap(cpu);
}
static struct option info_opts[] = {
@ -518,6 +496,7 @@ static struct option info_opts[] = {
{"proc", no_argument, NULL, 'o'},
{"human", no_argument, NULL, 'm'},
{"no-rounding", no_argument, NULL, 'n'},
{"performance", no_argument, NULL, 'c'},
{ },
};
@ -531,7 +510,7 @@ int cmd_freq_info(int argc, char **argv)
int output_param = 0;
do {
ret = getopt_long(argc, argv, "oefwldpgrasmybn", info_opts,
ret = getopt_long(argc, argv, "oefwldpgrasmybnc", info_opts,
NULL);
switch (ret) {
case '?':
@ -554,6 +533,7 @@ int cmd_freq_info(int argc, char **argv)
case 'e':
case 's':
case 'y':
case 'c':
if (output_param) {
output_param = -1;
cont = 0;
@ -660,6 +640,9 @@ int cmd_freq_info(int argc, char **argv)
case 'y':
ret = get_latency(cpu, human);
break;
case 'c':
ret = get_perf_cap(cpu);
break;
}
if (ret)
return ret;

77
tools/power/cpupower/utils/helpers/amd.c
View File

@ -8,7 +8,10 @@
#include <pci/pci.h>
#include "helpers/helpers.h"
#include "cpufreq.h"
#include "acpi_cppc.h"
/* ACPI P-States Helper Functions for AMD Processors ***************/
#define MSR_AMD_PSTATE_STATUS 0xc0010063
#define MSR_AMD_PSTATE 0xc0010064
#define MSR_AMD_PSTATE_LIMIT 0xc0010061
@ -146,4 +149,78 @@ int amd_pci_get_num_boost_states(int *active, int *states)
pci_cleanup(pci_acc);
return 0;
}
/* ACPI P-States Helper Functions for AMD Processors ***************/
/* AMD P-State Helper Functions ************************************/
enum amd_pstate_value {
AMD_PSTATE_HIGHEST_PERF,
AMD_PSTATE_MAX_FREQ,
AMD_PSTATE_LOWEST_NONLINEAR_FREQ,
MAX_AMD_PSTATE_VALUE_READ_FILES,
};
static const char *amd_pstate_value_files[MAX_AMD_PSTATE_VALUE_READ_FILES] = {
[AMD_PSTATE_HIGHEST_PERF] = "amd_pstate_highest_perf",
[AMD_PSTATE_MAX_FREQ] = "amd_pstate_max_freq",
[AMD_PSTATE_LOWEST_NONLINEAR_FREQ] = "amd_pstate_lowest_nonlinear_freq",
};
static unsigned long amd_pstate_get_data(unsigned int cpu,
enum amd_pstate_value value)
{
return cpufreq_get_sysfs_value_from_table(cpu,
amd_pstate_value_files,
value,
MAX_AMD_PSTATE_VALUE_READ_FILES);
}
void amd_pstate_boost_init(unsigned int cpu, int *support, int *active)
{
unsigned long highest_perf, nominal_perf, cpuinfo_min,
cpuinfo_max, amd_pstate_max;
highest_perf = amd_pstate_get_data(cpu, AMD_PSTATE_HIGHEST_PERF);
nominal_perf = acpi_cppc_get_data(cpu, NOMINAL_PERF);
*support = highest_perf > nominal_perf ? 1 : 0;
if (!(*support))
return;
cpufreq_get_hardware_limits(cpu, &cpuinfo_min, &cpuinfo_max);
amd_pstate_max = amd_pstate_get_data(cpu, AMD_PSTATE_MAX_FREQ);
*active = cpuinfo_max == amd_pstate_max ? 1 : 0;
}
void amd_pstate_show_perf_and_freq(unsigned int cpu, int no_rounding)
{
printf(_(" AMD PSTATE Highest Performance: %lu. Maximum Frequency: "),
amd_pstate_get_data(cpu, AMD_PSTATE_HIGHEST_PERF));
/*
* If boost isn't active, the cpuinfo_max doesn't indicate real max
* frequency. So we read it back from amd-pstate sysfs entry.
*/
print_speed(amd_pstate_get_data(cpu, AMD_PSTATE_MAX_FREQ), no_rounding);
printf(".\n");
printf(_(" AMD PSTATE Nominal Performance: %lu. Nominal Frequency: "),
acpi_cppc_get_data(cpu, NOMINAL_PERF));
print_speed(acpi_cppc_get_data(cpu, NOMINAL_FREQ) * 1000,
no_rounding);
printf(".\n");
printf(_(" AMD PSTATE Lowest Non-linear Performance: %lu. Lowest Non-linear Frequency: "),
acpi_cppc_get_data(cpu, LOWEST_NONLINEAR_PERF));
print_speed(amd_pstate_get_data(cpu, AMD_PSTATE_LOWEST_NONLINEAR_FREQ),
no_rounding);
printf(".\n");
printf(_(" AMD PSTATE Lowest Performance: %lu. Lowest Frequency: "),
acpi_cppc_get_data(cpu, LOWEST_PERF));
print_speed(acpi_cppc_get_data(cpu, LOWEST_FREQ) * 1000, no_rounding);
printf(".\n");
}
/* AMD P-State Helper Functions ************************************/
#endif /* defined(__i386__) || defined(__x86_64__) */

13
tools/power/cpupower/utils/helpers/cpuid.c
View File

@ -149,6 +149,19 @@ out:
if (ext_cpuid_level >= 0x80000008 &&
cpuid_ebx(0x80000008) & (1 << 4))
cpu_info->caps |= CPUPOWER_CAP_AMD_RDPRU;
if (cpupower_amd_pstate_enabled()) {
cpu_info->caps |= CPUPOWER_CAP_AMD_PSTATE;
/*
* If AMD P-State is enabled, the firmware will treat
* AMD P-State function as high priority.
*/
cpu_info->caps &= ~CPUPOWER_CAP_AMD_CPB;
cpu_info->caps &= ~CPUPOWER_CAP_AMD_CPB_MSR;
cpu_info->caps &= ~CPUPOWER_CAP_AMD_HW_PSTATE;
cpu_info->caps &= ~CPUPOWER_CAP_AMD_PSTATEDEF;
}
}
if (cpu_info->vendor == X86_VENDOR_INTEL) {

22
tools/power/cpupower/utils/helpers/helpers.h
View File

@ -11,6 +11,7 @@
#include <libintl.h>
#include <locale.h>
#include <stdbool.h>
#include "helpers/bitmask.h"
#include <cpupower.h>
@ -73,6 +74,7 @@ enum cpupower_cpu_vendor {X86_VENDOR_UNKNOWN = 0, X86_VENDOR_INTEL,
#define CPUPOWER_CAP_AMD_HW_PSTATE 0x00000100
#define CPUPOWER_CAP_AMD_PSTATEDEF 0x00000200
#define CPUPOWER_CAP_AMD_CPB_MSR 0x00000400
#define CPUPOWER_CAP_AMD_PSTATE 0x00000800
#define CPUPOWER_AMD_CPBDIS 0x02000000
@ -135,6 +137,16 @@ extern int decode_pstates(unsigned int cpu, int boost_states,
extern int cpufreq_has_boost_support(unsigned int cpu, int *support,
int *active, int * states);
/* AMD P-State stuff **************************/
bool cpupower_amd_pstate_enabled(void);
void amd_pstate_boost_init(unsigned int cpu,
int *support, int *active);
void amd_pstate_show_perf_and_freq(unsigned int cpu,
int no_rounding);
/* AMD P-State stuff **************************/
/*
* CPUID functions returning a single datum
*/
@ -167,6 +179,15 @@ static inline int cpufreq_has_boost_support(unsigned int cpu, int *support,
int *active, int * states)
{ return -1; }
static inline bool cpupower_amd_pstate_enabled(void)
{ return false; }
static inline void amd_pstate_boost_init(unsigned int cpu, int *support,
int *active)
{}
static inline void amd_pstate_show_perf_and_freq(unsigned int cpu,
int no_rounding)
{}
/* cpuid and cpuinfo helpers **************************/
static inline unsigned int cpuid_eax(unsigned int op) { return 0; };
@ -184,5 +205,6 @@ extern struct bitmask *offline_cpus;
void get_cpustate(void);
void print_online_cpus(void);
void print_offline_cpus(void);
void print_speed(unsigned long speed, int no_rounding);
#endif /* __CPUPOWERUTILS_HELPERS__ */

60
tools/power/cpupower/utils/helpers/misc.c
View File

@ -3,9 +3,11 @@
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include "helpers/helpers.h"
#include "helpers/sysfs.h"
#include "cpufreq.h"
#if defined(__i386__) || defined(__x86_64__)
@ -39,6 +41,8 @@ int cpufreq_has_boost_support(unsigned int cpu, int *support, int *active,
if (ret)
return ret;
}
} else if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_PSTATE) {
amd_pstate_boost_init(cpu, support, active);
} else if (cpupower_cpu_info.caps & CPUPOWER_CAP_INTEL_IDA)
*support = *active = 1;
return 0;
@ -83,6 +87,22 @@ int cpupower_intel_set_perf_bias(unsigned int cpu, unsigned int val)
return 0;
}
bool cpupower_amd_pstate_enabled(void)
{
char *driver = cpufreq_get_driver(0);
bool ret = false;
if (!driver)
return ret;
if (!strcmp(driver, "amd-pstate"))
ret = true;
cpufreq_put_driver(driver);
return ret;
}
#endif /* #if defined(__i386__) || defined(__x86_64__) */
/* get_cpustate
@ -144,3 +164,43 @@ void print_offline_cpus(void)
printf(_("cpupower set operation was not performed on them\n"));
}
}
/*
* print_speed
*
* Print the exact CPU frequency with appropriate unit
*/
void print_speed(unsigned long speed, int no_rounding)
{
unsigned long tmp;
if (no_rounding) {
if (speed > 1000000)
printf("%u.%06u GHz", ((unsigned int)speed / 1000000),
((unsigned int)speed % 1000000));
else if (speed > 1000)
printf("%u.%03u MHz", ((unsigned int)speed / 1000),
(unsigned int)(speed % 1000));
else
printf("%lu kHz", speed);
} else {
if (speed > 1000000) {
tmp = speed % 10000;
if (tmp >= 5000)
speed += 10000;
printf("%u.%02u GHz", ((unsigned int)speed / 1000000),
((unsigned int)(speed % 1000000) / 10000));
} else if (speed > 100000) {
tmp = speed % 1000;
if (tmp >= 500)
speed += 1000;
printf("%u MHz", ((unsigned int)speed / 1000));
} else if (speed > 1000) {
tmp = speed % 100;
if (tmp >= 50)
speed += 100;
printf("%u.%01u MHz", ((unsigned int)speed / 1000),
((unsigned int)(speed % 1000) / 100));
}
}
}