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cpupower: Add AMD P-State sysfs definition and access helper 

Introduce the marco definitions and access helper function for
AMD P-State 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 P-State cpufreq driver for cpupower utilities.

Reviewed-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
This commit is contained in:
Huang Rui 2022-02-22 23:34:22 +08:00 committed by Shuah Khan
parent 4a06806e5d
commit 33e43f3636
1 changed files with 30 additions and 0 deletions
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30
tools/power/cpupower/utils/helpers/amd.c
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@ -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 +149,31 @@ 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);
}
/* AMD P-State Helper Functions ************************************/
#endif /* defined(__i386__) || defined(__x86_64__) */