1/*
2 * Written by: Matthew Dobson, IBM Corporation
3 *
4 * Copyright (C) 2002, IBM Corp.
5 *
6 * All rights reserved.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
16 * NON INFRINGEMENT.  See the GNU General Public License for more
17 * details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 *
23 * Send feedback to <colpatch@us.ibm.com>
24 */
25#ifndef _ASM_X86_TOPOLOGY_H
26#define _ASM_X86_TOPOLOGY_H
27
28/*
29 * to preserve the visibility of NUMA_NO_NODE definition,
30 * moved to there from here.  May be used independent of
31 * CONFIG_NUMA.
32 */
33#include <linux/numa.h>
34#include <linux/cpumask.h>
35
36#ifdef CONFIG_NUMA
37
38#include <asm/mpspec.h>
39#include <asm/percpu.h>
40
41/* Mappings between logical cpu number and node number */
42DECLARE_EARLY_PER_CPU(int, x86_cpu_to_node_map);
43
44#ifdef CONFIG_DEBUG_PER_CPU_MAPS
45/*
46 * override generic percpu implementation of cpu_to_node
47 */
48extern int __cpu_to_node(int cpu);
49#define cpu_to_node __cpu_to_node
50
51extern int early_cpu_to_node(int cpu);
52
53#else	/* !CONFIG_DEBUG_PER_CPU_MAPS */
54
55/* Same function but used if called before per_cpu areas are setup */
56static inline int early_cpu_to_node(int cpu)
57{
58	return early_per_cpu(x86_cpu_to_node_map, cpu);
59}
60
61#endif /* !CONFIG_DEBUG_PER_CPU_MAPS */
62
63/* Mappings between node number and cpus on that node. */
64extern cpumask_var_t node_to_cpumask_map[MAX_NUMNODES];
65
66#ifdef CONFIG_DEBUG_PER_CPU_MAPS
67extern const struct cpumask *cpumask_of_node(int node);
68#else
69/* Returns a pointer to the cpumask of CPUs on Node 'node'. */
70static inline const struct cpumask *cpumask_of_node(int node)
71{
72	return node_to_cpumask_map[node];
73}
74#endif
75
76extern void setup_node_to_cpumask_map(void);
77
78#define pcibus_to_node(bus) __pcibus_to_node(bus)
79
80extern int __node_distance(int, int);
81#define node_distance(a, b) __node_distance(a, b)
82
83#else /* !CONFIG_NUMA */
84
85static inline int numa_node_id(void)
86{
87	return 0;
88}
89/*
90 * indicate override:
91 */
92#define numa_node_id numa_node_id
93
94static inline int early_cpu_to_node(int cpu)
95{
96	return 0;
97}
98
99static inline void setup_node_to_cpumask_map(void) { }
100
101#endif
102
103#include <asm-generic/topology.h>
104
105extern const struct cpumask *cpu_coregroup_mask(int cpu);
106extern const struct cpumask *cpu_clustergroup_mask(int cpu);
107
108#define topology_logical_package_id(cpu)	(cpu_data(cpu).logical_proc_id)
109#define topology_physical_package_id(cpu)	(cpu_data(cpu).phys_proc_id)
110#define topology_logical_die_id(cpu)		(cpu_data(cpu).logical_die_id)
111#define topology_die_id(cpu)			(cpu_data(cpu).cpu_die_id)
112#define topology_core_id(cpu)			(cpu_data(cpu).cpu_core_id)
113#define topology_ppin(cpu)			(cpu_data(cpu).ppin)
114
115extern unsigned int __max_die_per_package;
116
117#ifdef CONFIG_SMP
118#define topology_cluster_id(cpu)		(per_cpu(cpu_l2c_id, cpu))
119#define topology_die_cpumask(cpu)		(per_cpu(cpu_die_map, cpu))
120#define topology_cluster_cpumask(cpu)		(cpu_clustergroup_mask(cpu))
121#define topology_core_cpumask(cpu)		(per_cpu(cpu_core_map, cpu))
122#define topology_sibling_cpumask(cpu)		(per_cpu(cpu_sibling_map, cpu))
123
124extern unsigned int __max_logical_packages;
125#define topology_max_packages()			(__max_logical_packages)
126
127static inline int topology_max_die_per_package(void)
128{
129	return __max_die_per_package;
130}
131
132extern int __max_smt_threads;
133
134static inline int topology_max_smt_threads(void)
135{
136	return __max_smt_threads;
137}
138
139#include <linux/cpu_smt.h>
140
141int topology_update_package_map(unsigned int apicid, unsigned int cpu);
142int topology_update_die_map(unsigned int dieid, unsigned int cpu);
143int topology_phys_to_logical_pkg(unsigned int pkg);
144
145extern struct cpumask __cpu_primary_thread_mask;
146#define cpu_primary_thread_mask ((const struct cpumask *)&__cpu_primary_thread_mask)
147
148/**
149 * topology_is_primary_thread - Check whether CPU is the primary SMT thread
150 * @cpu:	CPU to check
151 */
152static inline bool topology_is_primary_thread(unsigned int cpu)
153{
154	return cpumask_test_cpu(cpu, cpu_primary_thread_mask);
155}
156#else /* CONFIG_SMP */
157#define topology_max_packages()			(1)
158static inline int
159topology_update_package_map(unsigned int apicid, unsigned int cpu) { return 0; }
160static inline int
161topology_update_die_map(unsigned int dieid, unsigned int cpu) { return 0; }
162static inline int topology_phys_to_logical_pkg(unsigned int pkg) { return 0; }
163static inline int topology_max_die_per_package(void) { return 1; }
164static inline int topology_max_smt_threads(void) { return 1; }
165static inline bool topology_is_primary_thread(unsigned int cpu) { return true; }
166#endif /* !CONFIG_SMP */
167
168static inline void arch_fix_phys_package_id(int num, u32 slot)
169{
170}
171
172struct pci_bus;
173int x86_pci_root_bus_node(int bus);
174void x86_pci_root_bus_resources(int bus, struct list_head *resources);
175
176extern bool x86_topology_update;
177
178#ifdef CONFIG_SCHED_MC_PRIO
179#include <asm/percpu.h>
180
181DECLARE_PER_CPU_READ_MOSTLY(int, sched_core_priority);
182extern unsigned int __read_mostly sysctl_sched_itmt_enabled;
183
184/* Interface to set priority of a cpu */
185void sched_set_itmt_core_prio(int prio, int core_cpu);
186
187/* Interface to notify scheduler that system supports ITMT */
188int sched_set_itmt_support(void);
189
190/* Interface to notify scheduler that system revokes ITMT support */
191void sched_clear_itmt_support(void);
192
193#else /* CONFIG_SCHED_MC_PRIO */
194
195#define sysctl_sched_itmt_enabled	0
196static inline void sched_set_itmt_core_prio(int prio, int core_cpu)
197{
198}
199static inline int sched_set_itmt_support(void)
200{
201	return 0;
202}
203static inline void sched_clear_itmt_support(void)
204{
205}
206#endif /* CONFIG_SCHED_MC_PRIO */
207
208#if defined(CONFIG_SMP) && defined(CONFIG_X86_64)
209#include <asm/cpufeature.h>
210
211DECLARE_STATIC_KEY_FALSE(arch_scale_freq_key);
212
213#define arch_scale_freq_invariant() static_branch_likely(&arch_scale_freq_key)
214
215DECLARE_PER_CPU(unsigned long, arch_freq_scale);
216
217static inline long arch_scale_freq_capacity(int cpu)
218{
219	return per_cpu(arch_freq_scale, cpu);
220}
221#define arch_scale_freq_capacity arch_scale_freq_capacity
222
223extern void arch_set_max_freq_ratio(bool turbo_disabled);
224extern void freq_invariance_set_perf_ratio(u64 ratio, bool turbo_disabled);
225#else
226static inline void arch_set_max_freq_ratio(bool turbo_disabled) { }
227static inline void freq_invariance_set_perf_ratio(u64 ratio, bool turbo_disabled) { }
228#endif
229
230extern void arch_scale_freq_tick(void);
231#define arch_scale_freq_tick arch_scale_freq_tick
232
233#ifdef CONFIG_ACPI_CPPC_LIB
234void init_freq_invariance_cppc(void);
235#define arch_init_invariance_cppc init_freq_invariance_cppc
236#endif
237
238#endif /* _ASM_X86_TOPOLOGY_H */
239