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aaf602d464
The scheduler is unaware of the applied min_freq limit to a CPU, which is useful information when predicting the frequency a CPU will run at for energy efficiency purposes. Export this information via arch_scale_min_freq_capacity() and wire it up for arm64. Change-Id: Icdff7628c095185280e95dd965d497e6f740c871 Signed-off-by: Sultan Alsawaf <sultan@kerneltoast.com> Signed-off-by: Richard Raya <rdxzv.dev@gmail.com>
68 lines
1.7 KiB
C
68 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* include/linux/arch_topology.h - arch specific cpu topology information
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*/
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#ifndef _LINUX_ARCH_TOPOLOGY_H_
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#define _LINUX_ARCH_TOPOLOGY_H_
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#include <linux/types.h>
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#include <linux/percpu.h>
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void topology_normalize_cpu_scale(void);
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int topology_detect_flags(void);
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int topology_smt_flags(void);
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int topology_core_flags(void);
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int topology_cpu_flags(void);
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int topology_update_cpu_topology(void);
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struct device_node;
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bool topology_parse_cpu_capacity(struct device_node *cpu_node, int cpu);
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DECLARE_PER_CPU(unsigned long, cpu_scale);
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struct sched_domain;
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static inline
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unsigned long topology_get_cpu_scale(struct sched_domain *sd, int cpu)
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{
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return per_cpu(cpu_scale, cpu);
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}
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void topology_set_cpu_scale(unsigned int cpu, unsigned long capacity);
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DECLARE_PER_CPU(unsigned long, efficiency);
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static inline
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unsigned long topology_get_cpu_efficiency(int cpu)
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{
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return per_cpu(efficiency, cpu);
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}
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DECLARE_PER_CPU(unsigned long, freq_scale);
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static inline
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unsigned long topology_get_freq_scale(struct sched_domain *sd, int cpu)
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{
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return per_cpu(freq_scale, cpu);
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}
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DECLARE_PER_CPU(unsigned long, arch_min_freq_scale);
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static inline unsigned long topology_get_min_freq_scale(int cpu)
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{
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return per_cpu(arch_min_freq_scale, cpu);
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}
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void topology_set_min_freq_scale(const struct cpumask *cpus,
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unsigned long min_freq, unsigned long max_freq);
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DECLARE_PER_CPU(unsigned long, max_freq_scale);
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DECLARE_PER_CPU(unsigned long, max_thermal_scale);
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static inline
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unsigned long topology_get_max_freq_scale(struct sched_domain *sd, int cpu)
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{
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return min(per_cpu(max_freq_scale, cpu),
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per_cpu(max_thermal_scale, cpu));
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}
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#endif /* _LINUX_ARCH_TOPOLOGY_H_ */
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