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authorWyes Karny <wyes.karny@amd.com>2023-06-19 22:05:02 +0300
committerShuah Khan <skhan@linuxfoundation.org>2023-07-19 01:06:56 +0300
commitdf8776b03689987e3239f3c010b6dc6ab4185d30 (patch)
tree1812288f1136c673c8a056140599441d1230b2a0 /tools/power
parentf2ab5557119a5ccd0ceaf7ecdca00ab782cd76c5 (diff)
downloadlinux-df8776b03689987e3239f3c010b6dc6ab4185d30.tar.xz
cpupower: Add support for amd_pstate mode change
amd_pstate supports changing of its mode dynamically via `status` sysfs file. Add the same capability in cpupower. To change the mode to active mode use below command: cpupower set --amd-pstate-mode active Acked-by: Huang Rui <ray.huang@amd.com> Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com> Reviewed-by: Mario Limonciello <mario.limonciello@amd.com> Signed-off-by: Wyes Karny <wyes.karny@amd.com> Tested-by: Perry Yuan <Perry.Yuan@amd.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Diffstat (limited to 'tools/power')
-rw-r--r--tools/power/cpupower/utils/cpupower-set.c24
-rw-r--r--tools/power/cpupower/utils/helpers/helpers.h3
-rw-r--r--tools/power/cpupower/utils/helpers/misc.c18
3 files changed, 43 insertions, 2 deletions
diff --git a/tools/power/cpupower/utils/cpupower-set.c b/tools/power/cpupower/utils/cpupower-set.c
index a789b123dbd4..c2ba69b7ea54 100644
--- a/tools/power/cpupower/utils/cpupower-set.c
+++ b/tools/power/cpupower/utils/cpupower-set.c
@@ -19,6 +19,7 @@
static struct option set_opts[] = {
{"perf-bias", required_argument, NULL, 'b'},
{"epp", required_argument, NULL, 'e'},
+ {"amd-pstate-mode", required_argument, NULL, 'm'},
{ },
};
@@ -39,12 +40,13 @@ int cmd_set(int argc, char **argv)
struct {
int perf_bias:1;
int epp:1;
+ int mode:1;
};
int params;
} params;
int perf_bias = 0;
int ret = 0;
- char epp[30];
+ char epp[30], mode[20];
ret = uname(&uts);
if (!ret && (!strcmp(uts.machine, "ppc64le") ||
@@ -58,7 +60,7 @@ int cmd_set(int argc, char **argv)
params.params = 0;
/* parameter parsing */
- while ((ret = getopt_long(argc, argv, "b:e:",
+ while ((ret = getopt_long(argc, argv, "b:e:m:",
set_opts, NULL)) != -1) {
switch (ret) {
case 'b':
@@ -81,6 +83,17 @@ int cmd_set(int argc, char **argv)
}
params.epp = 1;
break;
+ case 'm':
+ if (cpupower_cpu_info.vendor != X86_VENDOR_AMD)
+ print_wrong_arg_exit();
+ if (params.mode)
+ print_wrong_arg_exit();
+ if (sscanf(optarg, "%19s", mode) != 1) {
+ print_wrong_arg_exit();
+ return -EINVAL;
+ }
+ params.mode = 1;
+ break;
default:
print_wrong_arg_exit();
}
@@ -89,6 +102,12 @@ int cmd_set(int argc, char **argv)
if (!params.params)
print_wrong_arg_exit();
+ if (params.mode) {
+ ret = cpupower_set_amd_pstate_mode(mode);
+ if (ret)
+ fprintf(stderr, "Error setting mode\n");
+ }
+
/* Default is: set all CPUs */
if (bitmask_isallclear(cpus_chosen))
bitmask_setall(cpus_chosen);
@@ -123,6 +142,7 @@ int cmd_set(int argc, char **argv)
break;
}
}
+
}
return ret;
}
diff --git a/tools/power/cpupower/utils/helpers/helpers.h b/tools/power/cpupower/utils/helpers/helpers.h
index 5d998de2d291..d35596631eef 100644
--- a/tools/power/cpupower/utils/helpers/helpers.h
+++ b/tools/power/cpupower/utils/helpers/helpers.h
@@ -117,6 +117,7 @@ extern int cpupower_intel_get_perf_bias(unsigned int cpu);
extern unsigned long long msr_intel_get_turbo_ratio(unsigned int cpu);
extern int cpupower_set_epp(unsigned int cpu, char *epp);
+extern int cpupower_set_amd_pstate_mode(char *mode);
/* Read/Write msr ****************************/
@@ -177,6 +178,8 @@ static inline unsigned long long msr_intel_get_turbo_ratio(unsigned int cpu)
static inline int cpupower_set_epp(unsigned int cpu, char *epp)
{ return -1; };
+static inline int cpupower_set_amd_pstate_mode(char *mode)
+{ return -1; };
/* Read/Write msr ****************************/
diff --git a/tools/power/cpupower/utils/helpers/misc.c b/tools/power/cpupower/utils/helpers/misc.c
index 583df38ab13c..075c136a100c 100644
--- a/tools/power/cpupower/utils/helpers/misc.c
+++ b/tools/power/cpupower/utils/helpers/misc.c
@@ -106,6 +106,24 @@ int cpupower_set_epp(unsigned int cpu, char *epp)
return 0;
}
+int cpupower_set_amd_pstate_mode(char *mode)
+{
+ char path[SYSFS_PATH_MAX];
+ char linebuf[20] = {};
+
+ snprintf(path, sizeof(path), PATH_TO_CPU "amd_pstate/status");
+
+ if (!is_valid_path(path))
+ return -1;
+
+ snprintf(linebuf, sizeof(linebuf), "%s\n", mode);
+
+ if (cpupower_write_sysfs(path, linebuf, 20) <= 0)
+ return -1;
+
+ return 0;
+}
+
bool cpupower_amd_pstate_enabled(void)
{
char *driver = cpufreq_get_driver(0);