/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Header file for CPUFreq ondemand governor and related code .
*
* Copyright ( C ) 2016 , Intel Corporation
* Author : Rafael J . Wysocki < rafael . j . wysocki @ intel . com >
*/
#include "cpufreq_governor.h"
struct od_policy_dbs_info {
struct policy_dbs_info policy_dbs;
unsigned int freq_lo;
unsigned int freq_lo_delay_us;
unsigned int freq_hi_delay_us;
unsigned int sample_type:1 ;
};
static inline struct od_policy_dbs_info *to_dbs_info(struct policy_dbs_info *policy_dbs)
{
return container_of(policy_dbs, struct od_policy_dbs_info, policy_dbs);
}
struct od_dbs_tuners {
unsigned int powersave_bias;
};
#ifdef CONFIG_X86
#include <asm /cpu_device_id.h>
/*
* Not all CPUs want IO time to be accounted as busy ; this depends on
* how efficient idling at a higher frequency / voltage is .
*
* Pavel Machek says this is not so for various generations of AMD and
* old Intel systems . Mike Chan ( android . com ) claims this is also not
* true for ARM .
*
* Because of this , select a known series of Intel CPUs ( Family 6 and
* later ) by default , and leave all others up to the user .
*/
static inline bool od_should_io_be_busy(void )
{
return (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL &&
boot_cpu_data.x86_vfm >= INTEL_PENTIUM_PRO);
}
#else
static inline bool od_should_io_be_busy(void ) { return false ; }
#endif
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(vorverarbeitet am 2026-09-29)
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