[PATCH v2 17/21] cpupower: add amd-pstate sysfs definition and access helper
From: Huang Rui <ray.huang@amd.com>
Date: 2021-09-26 09:07:51
Also in:
lkml
Subsystem:
cpu power monitoring subsystem, the rest · Maintainers:
Thomas Renninger, Shuah Khan, John B. Wyatt IV, John Kacur, Linus Torvalds
Introduce the marco definitions and access helper function for amd-pstate sysfs interfaces such as each performance goals and frequency levels in amd helper file. They will be used to read the sysfs attribute from amd-pstate cpufreq driver for cpupower utilities. Signed-off-by: Huang Rui <ray.huang@amd.com> --- tools/power/cpupower/utils/helpers/amd.c | 39 ++++++++++++++++++++++++ 1 file changed, 39 insertions(+)
diff --git a/tools/power/cpupower/utils/helpers/amd.c b/tools/power/cpupower/utils/helpers/amd.c
index 97f2c857048e..b953277215c0 100644
--- a/tools/power/cpupower/utils/helpers/amd.c
+++ b/tools/power/cpupower/utils/helpers/amd.c@@ -8,7 +8,9 @@ #include <pci/pci.h> #include "helpers/helpers.h" +#include "cpufreq.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 +148,41 @@ 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-States Helper Functions ***************/ +enum amd_pstate_value { + AMD_PSTATE_HIGHEST_PERF, + AMD_PSTATE_NOMINAL_PERF, + AMD_PSTATE_LOWEST_NONLINEAR_PERF, + AMD_PSTATE_LOWEST_PERF, + AMD_PSTATE_MAX_FREQ, + AMD_PSTATE_NOMINAL_FREQ, + AMD_PSTATE_LOWEST_NONLINEAR_FREQ, + AMD_PSTATE_MIN_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_NOMINAL_PERF] = "amd_pstate_nominal_perf", + [AMD_PSTATE_LOWEST_NONLINEAR_PERF] = "amd_pstate_lowest_nonlinear_perf", + [AMD_PSTATE_LOWEST_PERF] = "amd_pstate_lowest_perf", + [AMD_PSTATE_MAX_FREQ] = "amd_pstate_max_freq", + [AMD_PSTATE_NOMINAL_FREQ] = "amd_pstate_nominal_freq", + [AMD_PSTATE_LOWEST_NONLINEAR_FREQ] = "amd_pstate_lowest_nonlinear_freq", + [AMD_PSTATE_MIN_FREQ] = "amd_pstate_min_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); +} + +/* AMD P-States Helper Functions ***************/ #endif /* defined(__i386__) || defined(__x86_64__) */
--
2.25.1