1 files changed, 97 insertions, 0 deletions
diff --git a/include/linux/arch_topology.h b/include/linux/arch_topology.h
new file mode 100644
index 000000000..a07b510e7
--- /dev/null
+++ b/include/linux/arch_topology.h
@@ -0,0 +1,97 @@
+/* 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);
+
+#ifdef CONFIG_ACPI_CPPC_LIB
+void topology_init_cpu_capacity_cppc(void);
+#endif
+
+struct device_node;
+bool topology_parse_cpu_capacity(struct device_node *cpu_node, int cpu);
+
+DECLARE_PER_CPU(unsigned long, cpu_scale);
+
+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, arch_freq_scale);
+
+static inline unsigned long topology_get_freq_scale(int cpu)
+{
+	return per_cpu(arch_freq_scale, cpu);
+}
+
+void topology_set_freq_scale(const struct cpumask *cpus, unsigned long cur_freq,
+			     unsigned long max_freq);
+bool topology_scale_freq_invariant(void);
+
+enum scale_freq_source {
+	SCALE_FREQ_SOURCE_CPUFREQ = 0,
+	SCALE_FREQ_SOURCE_ARCH,
+	SCALE_FREQ_SOURCE_CPPC,
+};
+
+struct scale_freq_data {
+	enum scale_freq_source source;
+	void (*set_freq_scale)(void);
+};
+
+void topology_scale_freq_tick(void);
+void topology_set_scale_freq_source(struct scale_freq_data *data, const struct cpumask *cpus);
+void topology_clear_scale_freq_source(enum scale_freq_source source, const struct cpumask *cpus);
+
+DECLARE_PER_CPU(unsigned long, thermal_pressure);
+
+static inline unsigned long topology_get_thermal_pressure(int cpu)
+{
+	return per_cpu(thermal_pressure, cpu);
+}
+
+void topology_update_thermal_pressure(const struct cpumask *cpus,
+				      unsigned long capped_freq);
+
+struct cpu_topology {
+	int thread_id;
+	int core_id;
+	int cluster_id;
+	int package_id;
+	cpumask_t thread_sibling;
+	cpumask_t core_sibling;
+	cpumask_t cluster_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_cluster_id(cpu)	(cpu_topology[cpu].cluster_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_cluster_cpumask(cpu)	(&cpu_topology[cpu].cluster_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);
+const struct cpumask *cpu_clustergroup_mask(int cpu);
+void update_siblings_masks(unsigned int cpu);
+void remove_cpu_topology(unsigned int cpuid);
+void reset_cpu_topology(void);
+int parse_acpi_topology(void);
+#endif
+
+#endif /* _LINUX_ARCH_TOPOLOGY_H_ */