1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_X86_SMP_H
3#define _ASM_X86_SMP_H
4#ifndef __ASSEMBLY__
5#include <linux/cpumask.h>
6
7#include <asm/cpumask.h>
8#include <asm/current.h>
9#include <asm/thread_info.h>
10
11DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_sibling_map);
12DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_map);
13DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_die_map);
14/* cpus sharing the last level cache: */
15DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map);
16DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_l2c_shared_map);
17
18DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_apicid);
19DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid);
20
21struct task_struct;
22
23struct smp_ops {
24 void (*smp_prepare_boot_cpu)(void);
25 void (*smp_prepare_cpus)(unsigned max_cpus);
26 void (*smp_cpus_done)(unsigned max_cpus);
27
28 void (*stop_other_cpus)(int wait);
29 void (*crash_stop_other_cpus)(void);
30 void (*smp_send_reschedule)(int cpu);
31
32 void (*cleanup_dead_cpu)(unsigned cpu);
33 void (*poll_sync_state)(void);
34 int (*kick_ap_alive)(unsigned cpu, struct task_struct *tidle);
35 int (*cpu_disable)(void);
36 void (*cpu_die)(unsigned int cpu);
37 void (*play_dead)(void);
38
39 void (*send_call_func_ipi)(const struct cpumask *mask);
40 void (*send_call_func_single_ipi)(int cpu);
41};
42
43/* Globals due to paravirt */
44extern void set_cpu_sibling_map(int cpu);
45
46#ifdef CONFIG_SMP
47extern struct smp_ops smp_ops;
48
49static inline void smp_send_stop(void)
50{
51 smp_ops.stop_other_cpus(0);
52}
53
54static inline void stop_other_cpus(void)
55{
56 smp_ops.stop_other_cpus(1);
57}
58
59static inline void smp_prepare_cpus(unsigned int max_cpus)
60{
61 smp_ops.smp_prepare_cpus(max_cpus);
62}
63
64static inline void smp_cpus_done(unsigned int max_cpus)
65{
66 smp_ops.smp_cpus_done(max_cpus);
67}
68
69static inline int __cpu_disable(void)
70{
71 return smp_ops.cpu_disable();
72}
73
74static inline void __cpu_die(unsigned int cpu)
75{
76 if (smp_ops.cpu_die)
77 smp_ops.cpu_die(cpu);
78}
79
80static inline void __noreturn play_dead(void)
81{
82 smp_ops.play_dead();
83 BUG();
84}
85
86static inline void arch_smp_send_reschedule(int cpu)
87{
88 smp_ops.smp_send_reschedule(cpu);
89}
90
91static inline void arch_send_call_function_single_ipi(int cpu)
92{
93 smp_ops.send_call_func_single_ipi(cpu);
94}
95
96static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
97{
98 smp_ops.send_call_func_ipi(mask);
99}
100
101void cpu_disable_common(void);
102void native_smp_prepare_boot_cpu(void);
103void smp_prepare_cpus_common(void);
104void native_smp_prepare_cpus(unsigned int max_cpus);
105void native_smp_cpus_done(unsigned int max_cpus);
106int common_cpu_up(unsigned int cpunum, struct task_struct *tidle);
107int native_kick_ap(unsigned int cpu, struct task_struct *tidle);
108int native_cpu_disable(void);
109void __noreturn hlt_play_dead(void);
110void native_play_dead(void);
111void play_dead_common(void);
112void wbinvd_on_cpu(int cpu);
113int wbinvd_on_all_cpus(void);
114
115void smp_kick_mwait_play_dead(void);
116
117void native_smp_send_reschedule(int cpu);
118void native_send_call_func_ipi(const struct cpumask *mask);
119void native_send_call_func_single_ipi(int cpu);
120
121void smp_store_cpu_info(int id);
122
123asmlinkage __visible void smp_reboot_interrupt(void);
124__visible void smp_reschedule_interrupt(struct pt_regs *regs);
125__visible void smp_call_function_interrupt(struct pt_regs *regs);
126__visible void smp_call_function_single_interrupt(struct pt_regs *r);
127
128#define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
129#define cpu_acpi_id(cpu) per_cpu(x86_cpu_to_acpiid, cpu)
130
131/*
132 * This function is needed by all SMP systems. It must _always_ be valid
133 * from the initial startup.
134 */
135#define raw_smp_processor_id() this_cpu_read(pcpu_hot.cpu_number)
136#define __smp_processor_id() __this_cpu_read(pcpu_hot.cpu_number)
137
138#ifdef CONFIG_X86_32
139extern int safe_smp_processor_id(void);
140#else
141# define safe_smp_processor_id() smp_processor_id()
142#endif
143
144static inline struct cpumask *cpu_llc_shared_mask(int cpu)
145{
146 return per_cpu(cpu_llc_shared_map, cpu);
147}
148
149static inline struct cpumask *cpu_l2c_shared_mask(int cpu)
150{
151 return per_cpu(cpu_l2c_shared_map, cpu);
152}
153
154#else /* !CONFIG_SMP */
155#define wbinvd_on_cpu(cpu) wbinvd()
156static inline int wbinvd_on_all_cpus(void)
157{
158 wbinvd();
159 return 0;
160}
161
162static inline struct cpumask *cpu_llc_shared_mask(int cpu)
163{
164 return (struct cpumask *)cpumask_of(0);
165}
166#endif /* CONFIG_SMP */
167
168#ifdef CONFIG_DEBUG_NMI_SELFTEST
169extern void nmi_selftest(void);
170#else
171#define nmi_selftest() do { } while (0)
172#endif
173
174extern unsigned int smpboot_control;
175extern unsigned long apic_mmio_base;
176
177#endif /* !__ASSEMBLY__ */
178
179/* Control bits for startup_64 */
180#define STARTUP_READ_APICID 0x80000000
181
182/* Top 8 bits are reserved for control */
183#define STARTUP_PARALLEL_MASK 0xFF000000
184
185#endif /* _ASM_X86_SMP_H */
186

source code of linux/arch/x86/include/asm/smp.h