[PATCH 16/19] cpupower: enable boost state support for amd-pstate module

Huang Rui
2021-09-08T15:02:15Z

The AMD P-state boost API is different from ACPI hardware P-states, so
implement the support for amd-pstate kernel module.

Signed-off-by: Huang Rui <ray.huang@amd.com>
---
tools/power/cpupower/lib/cpufreq.c | 20 ++++++++++++++++++++
tools/power/cpupower/lib/cpufreq.h | 3 +++
tools/power/cpupower/utils/helpers/misc.c | 7 +++++++
3 files changed, 30 insertions(+)

diff --git a/tools/power/cpupower/lib/cpufreq.c b/tools/power/cpupower/lib/cpufreq.c
index 3f92ddadaad2..37da87bdcfb1 100644
--- a/tools/power/cpupower/lib/cpufreq.c
+++ b/tools/power/cpupower/lib/cpufreq.c
@@ -790,3 +790,23 @@ unsigned long cpufreq_get_transitions(unsigned int cpu)
{
return sysfs_cpufreq_get_one_value(cpu, STATS_NUM_TRANSITIONS);
}
+
+int amd_pstate_boost_support(unsigned int cpu)
+{
+ unsigned int highest_perf, nominal_perf;
+
+ highest_perf = sysfs_cpufreq_get_one_value(cpu, AMD_PSTATE_HIGHEST_PERF);
+ nominal_perf = sysfs_cpufreq_get_one_value(cpu, AMD_PSTATE_NOMINAL_PERF);
+
+ return highest_perf > nominal_perf ? 1 : 0;
+}
+
+int amd_pstate_boost_enabled(unsigned int cpu)
+{
+ unsigned int cpuinfo_max, amd_pstate_max;
+
+ cpuinfo_max = sysfs_cpufreq_get_one_value(cpu, CPUINFO_MAX_FREQ);
+ amd_pstate_max = sysfs_cpufreq_get_one_value(cpu, AMD_PSTATE_MAX_FREQ);
+
+ return cpuinfo_max == amd_pstate_max ? 1 : 0;
+}
diff --git a/tools/power/cpupower/lib/cpufreq.h b/tools/power/cpupower/lib/cpufreq.h
index 95f4fd9e2656..d54d02a7a4f4 100644
--- a/tools/power/cpupower/lib/cpufreq.h
+++ b/tools/power/cpupower/lib/cpufreq.h
@@ -203,6 +203,9 @@ int cpufreq_modify_policy_governor(unsigned int cpu, char *governor);
int cpufreq_set_frequency(unsigned int cpu,
unsigned long target_frequency);

+int amd_pstate_boost_support(unsigned int cpu);
+int amd_pstate_boost_enabled(unsigned int cpu);
+
#ifdef __cplusplus
}
#endif
diff --git a/tools/power/cpupower/utils/helpers/misc.c b/tools/power/cpupower/utils/helpers/misc.c
index 07d80775fb68..aba979320760 100644
--- a/tools/power/cpupower/utils/helpers/misc.c
+++ b/tools/power/cpupower/utils/helpers/misc.c
@@ -10,6 +10,7 @@
#if defined(__i386__) || defined(__x86_64__)

#include "cpupower_intern.h"
+#include "cpufreq.h"

#define MSR_AMD_HWCR 0xc0010015

@@ -39,6 +40,12 @@ int cpufreq_has_boost_support(unsigned int cpu, int *support, int *active,
if (ret)
return ret;
}
+ } if ((cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_PSTATE) &&
+ amd_pstate_boost_support(cpu)) {
+ *support = 1;
+
+ if (amd_pstate_boost_enabled(cpu))
+ *active = 1;
} else if (cpupower_cpu_info.caps & CPUPOWER_CAP_INTEL_IDA)
*support = *active = 1;
return 0;
--
2.25.1