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
11extern int smp_num_siblings;
12extern unsigned int num_processors;
13
14DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_sibling_map);
15DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_map);
16DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_die_map);
17/* cpus sharing the last level cache: */
18DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map);
19DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_l2c_shared_map);
20
21DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_apicid);
22DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid);
23
24struct task_struct;
25
26struct smp_ops {
27 void (*smp_prepare_boot_cpu)(void);
28 void (*smp_prepare_cpus)(unsigned max_cpus);
29 void (*smp_cpus_done)(unsigned max_cpus);
30
31 void (*stop_other_cpus)(int wait);
32 void (*crash_stop_other_cpus)(void);
33 void (*smp_send_reschedule)(int cpu);
34
35 void (*cleanup_dead_cpu)(unsigned cpu);
36 void (*poll_sync_state)(void);
37 int (*kick_ap_alive)(unsigned cpu, struct task_struct *tidle);
38 int (*cpu_disable)(void);
39 void (*cpu_die)(unsigned int cpu);
40 void (*play_dead)(void);
41
42 void (*send_call_func_ipi)(const struct cpumask *mask);
43 void (*send_call_func_single_ipi)(int cpu);
44};
45
46/* Globals due to paravirt */
47extern void set_cpu_sibling_map(int cpu);
48
49#ifdef CONFIG_SMP
50extern struct smp_ops smp_ops;
51
52static inline void smp_send_stop(void)
53{
54 smp_ops.stop_other_cpus(0);
55}
56
57static inline void stop_other_cpus(void)
58{
59 smp_ops.stop_other_cpus(1);
60}
61
62static inline void smp_prepare_boot_cpu(void)
63{
64 smp_ops.smp_prepare_boot_cpu();
65}
66
67static inline void smp_prepare_cpus(unsigned int max_cpus)
68{
69 smp_ops.smp_prepare_cpus(max_cpus);
70}
71
72static inline void smp_cpus_done(unsigned int max_cpus)
73{
74 smp_ops.smp_cpus_done(max_cpus);
75}
76
77static inline int __cpu_disable(void)
78{
79 return smp_ops.cpu_disable();
80}
81
82static inline void __cpu_die(unsigned int cpu)
83{
84 if (smp_ops.cpu_die)
85 smp_ops.cpu_die(cpu);
86}
87
88static inline void __noreturn play_dead(void)
89{
90 smp_ops.play_dead();
91 BUG();
92}
93
94static inline void arch_smp_send_reschedule(int cpu)
95{
96 smp_ops.smp_send_reschedule(cpu);
97}
98
99static inline void arch_send_call_function_single_ipi(int cpu)
100{
101 smp_ops.send_call_func_single_ipi(cpu);
102}
103
104static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
105{
106 smp_ops.send_call_func_ipi(mask);
107}
108
109void cpu_disable_common(void);
110void native_smp_prepare_boot_cpu(void);
111void smp_prepare_cpus_common(void);
112void native_smp_prepare_cpus(unsigned int max_cpus);
113void calculate_max_logical_packages(void);
114void native_smp_cpus_done(unsigned int max_cpus);
115int common_cpu_up(unsigned int cpunum, struct task_struct *tidle);
116int native_kick_ap(unsigned int cpu, struct task_struct *tidle);
117int native_cpu_disable(void);
118void __noreturn hlt_play_dead(void);
119void native_play_dead(void);
120void play_dead_common(void);
121void wbinvd_on_cpu(int cpu);
122int wbinvd_on_all_cpus(void);
123
124void smp_kick_mwait_play_dead(void);
125
126void native_smp_send_reschedule(int cpu);
127void native_send_call_func_ipi(const struct cpumask *mask);
128void native_send_call_func_single_ipi(int cpu);
129
130void smp_store_cpu_info(int id);
131
132asmlinkage __visible void smp_reboot_interrupt(void);
133__visible void smp_reschedule_interrupt(struct pt_regs *regs);
134__visible void smp_call_function_interrupt(struct pt_regs *regs);
135__visible void smp_call_function_single_interrupt(struct pt_regs *r);
136
137#define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
138#define cpu_acpi_id(cpu) per_cpu(x86_cpu_to_acpiid, cpu)
139
140/*
141 * This function is needed by all SMP systems. It must _always_ be valid
142 * from the initial startup.
143 */
144#define raw_smp_processor_id() this_cpu_read(pcpu_hot.cpu_number)
145#define __smp_processor_id() __this_cpu_read(pcpu_hot.cpu_number)
146
147#ifdef CONFIG_X86_32
148extern int safe_smp_processor_id(void);
149#else
150# define safe_smp_processor_id() smp_processor_id()
151#endif
152
153static inline struct cpumask *cpu_llc_shared_mask(int cpu)
154{
155 return per_cpu(cpu_llc_shared_map, cpu);
156}
157
158static inline struct cpumask *cpu_l2c_shared_mask(int cpu)
159{
160 return per_cpu(cpu_l2c_shared_map, cpu);
161}
162
163#else /* !CONFIG_SMP */
164#define wbinvd_on_cpu(cpu) wbinvd()
165static inline int wbinvd_on_all_cpus(void)
166{
167 wbinvd();
168 return 0;
169}
170
171static inline struct cpumask *cpu_llc_shared_mask(int cpu)
172{
173 return (struct cpumask *)cpumask_of(0);
174}
175#endif /* CONFIG_SMP */
176
177extern unsigned disabled_cpus;
178
179#ifdef CONFIG_DEBUG_NMI_SELFTEST
180extern void nmi_selftest(void);
181#else
182#define nmi_selftest() do { } while (0)
183#endif
184
185extern unsigned int smpboot_control;
186extern unsigned long apic_mmio_base;
187
188#endif /* !__ASSEMBLY__ */
189
190/* Control bits for startup_64 */
191#define STARTUP_READ_APICID 0x80000000
192
193/* Top 8 bits are reserved for control */
194#define STARTUP_PARALLEL_MASK 0xFF000000
195
196#endif /* _ASM_X86_SMP_H */
197

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