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Merge back cpufreq material for 6.12

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This commit is contained in:
Rafael J. Wysocki 2024-09-02 14:27:53 +02:00
commit c4a6c82c9e
8 changed files with 13 additions and 29 deletions
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27
drivers/cpufreq/cpufreq.c
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@ -575,30 +575,11 @@ unsigned int cpufreq_policy_transition_delay_us(struct cpufreq_policy *policy)
return policy->transition_delay_us;
latency = policy->cpuinfo.transition_latency / NSEC_PER_USEC;
if (latency) {
unsigned int max_delay_us = 2 * MSEC_PER_SEC;
if (latency)
/* Give a 50% breathing room between updates */
return latency + (latency >> 1);
/*
* If the platform already has high transition_latency, use it
* as-is.
*/
if (latency > max_delay_us)
return latency;
/*
* For platforms that can change the frequency very fast (< 2
* us), the above formula gives a decent transition delay. But
* for platforms where transition_latency is in milliseconds, it
* ends up giving unrealistic values.
*
* Cap the default transition delay to 2 ms, which seems to be
* a reasonable amount of time after which we should reevaluate
* the frequency.
*/
return min(latency * LATENCY_MULTIPLIER, max_delay_us);
}
return LATENCY_MULTIPLIER;
return USEC_PER_MSEC;
}
EXPORT_SYMBOL_GPL(cpufreq_policy_transition_delay_us);

4
drivers/cpufreq/intel_pstate.c
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@ -2425,6 +2425,10 @@ static const struct x86_cpu_id intel_pstate_cpu_oob_ids[] __initconst = {
X86_MATCH(INTEL_ICELAKE_X, core_funcs),
X86_MATCH(INTEL_SAPPHIRERAPIDS_X, core_funcs),
X86_MATCH(INTEL_EMERALDRAPIDS_X, core_funcs),
X86_MATCH(INTEL_GRANITERAPIDS_D, core_funcs),
X86_MATCH(INTEL_GRANITERAPIDS_X, core_funcs),
X86_MATCH(INTEL_ATOM_CRESTMONT, core_funcs),
X86_MATCH(INTEL_ATOM_CRESTMONT_X, core_funcs),
{}
};
#endif

1
drivers/cpufreq/maple-cpufreq.c
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@ -238,4 +238,5 @@ bail_noprops:
module_init(maple_cpufreq_init);
MODULE_DESCRIPTION("cpufreq driver for Maple 970FX/970MP boards");
MODULE_LICENSE("GPL");

1
drivers/cpufreq/pasemi-cpufreq.c
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@ -269,5 +269,6 @@ static void __exit pas_cpufreq_exit(void)
module_init(pas_cpufreq_init);
module_exit(pas_cpufreq_exit);
MODULE_DESCRIPTION("cpufreq driver for PA Semi PWRficient");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Egor Martovetsky <egor@pasemi.com>, Olof Johansson <olof@lixom.net>");

1
drivers/cpufreq/pmac64-cpufreq.c
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@ -671,4 +671,5 @@ static int __init g5_cpufreq_init(void)
module_init(g5_cpufreq_init);
MODULE_DESCRIPTION("cpufreq driver for SMU & 970FX based G5 Macs");
MODULE_LICENSE("GPL");

1
drivers/cpufreq/powernv-cpufreq.c
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@ -1160,5 +1160,6 @@ static void __exit powernv_cpufreq_exit(void)
}
module_exit(powernv_cpufreq_exit);
MODULE_DESCRIPTION("cpufreq driver for IBM/OpenPOWER powernv systems");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Vaidyanathan Srinivasan <svaidy at linux.vnet.ibm.com>");

1
drivers/cpufreq/ppc_cbe_cpufreq.c
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@ -168,5 +168,6 @@ static void __exit cbe_cpufreq_exit(void)
module_init(cbe_cpufreq_init);
module_exit(cbe_cpufreq_exit);
MODULE_DESCRIPTION("cpufreq driver for Cell BE processors");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Christian Krafft <krafft@de.ibm.com>");

6
include/linux/cpufreq.h
View File

@ -577,12 +577,6 @@ static inline unsigned long cpufreq_scale(unsigned long old, u_int div,
#define CPUFREQ_POLICY_POWERSAVE (1)
#define CPUFREQ_POLICY_PERFORMANCE (2)
/*
* The polling frequency depends on the capability of the processor. Default
* polling frequency is 1000 times the transition latency of the processor.
*/
#define LATENCY_MULTIPLIER (1000)
struct cpufreq_governor {
char name[CPUFREQ_NAME_LEN];
int (*init)(struct cpufreq_policy *policy);