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