cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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arch_topology.h (2875B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 * include/linux/arch_topology.h - arch specific cpu topology information
      4 */
      5#ifndef _LINUX_ARCH_TOPOLOGY_H_
      6#define _LINUX_ARCH_TOPOLOGY_H_
      7
      8#include <linux/types.h>
      9#include <linux/percpu.h>
     10
     11void topology_normalize_cpu_scale(void);
     12int topology_update_cpu_topology(void);
     13
     14#ifdef CONFIG_ACPI_CPPC_LIB
     15void topology_init_cpu_capacity_cppc(void);
     16#endif
     17
     18struct device_node;
     19bool topology_parse_cpu_capacity(struct device_node *cpu_node, int cpu);
     20
     21DECLARE_PER_CPU(unsigned long, cpu_scale);
     22
     23static inline unsigned long topology_get_cpu_scale(int cpu)
     24{
     25	return per_cpu(cpu_scale, cpu);
     26}
     27
     28void topology_set_cpu_scale(unsigned int cpu, unsigned long capacity);
     29
     30DECLARE_PER_CPU(unsigned long, arch_freq_scale);
     31
     32static inline unsigned long topology_get_freq_scale(int cpu)
     33{
     34	return per_cpu(arch_freq_scale, cpu);
     35}
     36
     37void topology_set_freq_scale(const struct cpumask *cpus, unsigned long cur_freq,
     38			     unsigned long max_freq);
     39bool topology_scale_freq_invariant(void);
     40
     41enum scale_freq_source {
     42	SCALE_FREQ_SOURCE_CPUFREQ = 0,
     43	SCALE_FREQ_SOURCE_ARCH,
     44	SCALE_FREQ_SOURCE_CPPC,
     45};
     46
     47struct scale_freq_data {
     48	enum scale_freq_source source;
     49	void (*set_freq_scale)(void);
     50};
     51
     52void topology_scale_freq_tick(void);
     53void topology_set_scale_freq_source(struct scale_freq_data *data, const struct cpumask *cpus);
     54void topology_clear_scale_freq_source(enum scale_freq_source source, const struct cpumask *cpus);
     55
     56DECLARE_PER_CPU(unsigned long, thermal_pressure);
     57
     58static inline unsigned long topology_get_thermal_pressure(int cpu)
     59{
     60	return per_cpu(thermal_pressure, cpu);
     61}
     62
     63void topology_update_thermal_pressure(const struct cpumask *cpus,
     64				      unsigned long capped_freq);
     65
     66struct cpu_topology {
     67	int thread_id;
     68	int core_id;
     69	int cluster_id;
     70	int package_id;
     71	int llc_id;
     72	cpumask_t thread_sibling;
     73	cpumask_t core_sibling;
     74	cpumask_t cluster_sibling;
     75	cpumask_t llc_sibling;
     76};
     77
     78#ifdef CONFIG_GENERIC_ARCH_TOPOLOGY
     79extern struct cpu_topology cpu_topology[NR_CPUS];
     80
     81#define topology_physical_package_id(cpu)	(cpu_topology[cpu].package_id)
     82#define topology_cluster_id(cpu)	(cpu_topology[cpu].cluster_id)
     83#define topology_core_id(cpu)		(cpu_topology[cpu].core_id)
     84#define topology_core_cpumask(cpu)	(&cpu_topology[cpu].core_sibling)
     85#define topology_sibling_cpumask(cpu)	(&cpu_topology[cpu].thread_sibling)
     86#define topology_cluster_cpumask(cpu)	(&cpu_topology[cpu].cluster_sibling)
     87#define topology_llc_cpumask(cpu)	(&cpu_topology[cpu].llc_sibling)
     88void init_cpu_topology(void);
     89void store_cpu_topology(unsigned int cpuid);
     90const struct cpumask *cpu_coregroup_mask(int cpu);
     91const struct cpumask *cpu_clustergroup_mask(int cpu);
     92void update_siblings_masks(unsigned int cpu);
     93void remove_cpu_topology(unsigned int cpuid);
     94void reset_cpu_topology(void);
     95int parse_acpi_topology(void);
     96#endif
     97
     98#endif /* _LINUX_ARCH_TOPOLOGY_H_ */