Commit 33e43f36 authored by Huang Rui's avatar Huang Rui Committed by Shuah Khan
Browse files

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: default avatarShuah Khan <skhan@linuxfoundation.org>
Signed-off-by: default avatarHuang Rui <ray.huang@amd.com>
Signed-off-by: default avatarShuah Khan <skhan@linuxfoundation.org>
parent 4a06806e

tools/power/cpupower/utils/helpers/amd.c

+30 −0
Original line number Diff line number Diff line
@@ -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__) */