0cfe39fe40
Implements the Max Frequency Capping Engine (MFCE) getter function topology_get_max_freq_scale() to provide the scheduler with a maximum frequency scaling correction factor for more accurate cpu capacity handling by being able to deal with max frequency capping. This scaling factor describes the influence of running a cpu with a current maximum frequency (policy) lower than the maximum possible frequency (cpuinfo). The factor is: policy_max_freq(cpu) << SCHED_CAPACITY_SHIFT / cpuinfo_max_freq(cpu) It also implements the MFCE setter function arch_set_max_freq_scale() which is called from cpufreq_set_policy(). Change-Id: I59e52861ee260755ab0518fe1f7183a2e4e3d0fc Signed-off-by: Ionela Voinescu <ionela.voinescu@arm.com> Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com> [Trivial cherry-pick issue in cpufreq.c] Signed-off-by: Quentin Perret <quentin.perret@arm.com>
71 lines
1.8 KiB
C
71 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* include/linux/arch_topology.h - arch specific cpu topology information
|
|
*/
|
|
#ifndef _LINUX_ARCH_TOPOLOGY_H_
|
|
#define _LINUX_ARCH_TOPOLOGY_H_
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/percpu.h>
|
|
|
|
void topology_normalize_cpu_scale(void);
|
|
int topology_update_cpu_topology(void);
|
|
|
|
struct device_node;
|
|
bool topology_parse_cpu_capacity(struct device_node *cpu_node, int cpu);
|
|
|
|
DECLARE_PER_CPU(unsigned long, cpu_scale);
|
|
|
|
struct sched_domain;
|
|
static inline
|
|
unsigned long topology_get_cpu_scale(int cpu)
|
|
{
|
|
return per_cpu(cpu_scale, cpu);
|
|
}
|
|
|
|
void topology_set_cpu_scale(unsigned int cpu, unsigned long capacity);
|
|
|
|
DECLARE_PER_CPU(unsigned long, freq_scale);
|
|
|
|
static inline
|
|
unsigned long topology_get_freq_scale(int cpu)
|
|
{
|
|
return per_cpu(freq_scale, cpu);
|
|
}
|
|
|
|
DECLARE_PER_CPU(unsigned long, max_freq_scale);
|
|
|
|
static inline
|
|
unsigned long topology_get_max_freq_scale(struct sched_domain *sd, int cpu)
|
|
{
|
|
return per_cpu(max_freq_scale, cpu);
|
|
}
|
|
|
|
struct cpu_topology {
|
|
int thread_id;
|
|
int core_id;
|
|
int package_id;
|
|
int llc_id;
|
|
cpumask_t thread_sibling;
|
|
cpumask_t core_sibling;
|
|
cpumask_t llc_sibling;
|
|
};
|
|
|
|
#ifdef CONFIG_GENERIC_ARCH_TOPOLOGY
|
|
extern struct cpu_topology cpu_topology[NR_CPUS];
|
|
|
|
#define topology_physical_package_id(cpu) (cpu_topology[cpu].package_id)
|
|
#define topology_core_id(cpu) (cpu_topology[cpu].core_id)
|
|
#define topology_core_cpumask(cpu) (&cpu_topology[cpu].core_sibling)
|
|
#define topology_sibling_cpumask(cpu) (&cpu_topology[cpu].thread_sibling)
|
|
#define topology_llc_cpumask(cpu) (&cpu_topology[cpu].llc_sibling)
|
|
void init_cpu_topology(void);
|
|
void store_cpu_topology(unsigned int cpuid);
|
|
const struct cpumask *cpu_coregroup_mask(int cpu);
|
|
void update_siblings_masks(unsigned int cpu);
|
|
void remove_cpu_topology(unsigned int cpuid);
|
|
void reset_cpu_topology(void);
|
|
#endif
|
|
|
|
#endif /* _LINUX_ARCH_TOPOLOGY_H_ */
|