1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_X86_SMP_H
3#define _ASM_X86_SMP_H
4#ifndef __ASSEMBLER__
5#include <linux/cpumask.h>
6#include <linux/thread_info.h>
7
8#include <asm/cpumask.h>
9
10DECLARE_PER_CPU_CACHE_HOT(int, cpu_number);
11
12DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_sibling_map);
13DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_map);
14DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_die_map);
15/* cpus sharing the last level cache: */
16DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map);
17DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_l2c_shared_map);
18
19DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_apicid);
20DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid);
21
22struct task_struct;
23
24struct smp_ops {
25 void (*smp_prepare_boot_cpu)(void);
26 void (*smp_prepare_cpus)(unsigned max_cpus);
27 void (*smp_cpus_done)(unsigned max_cpus);
28
29 void (*stop_other_cpus)(int wait);
30 void (*crash_stop_other_cpus)(void);
31 void (*smp_send_reschedule)(int cpu);
32
33 void (*cleanup_dead_cpu)(unsigned cpu);
34 void (*poll_sync_state)(void);
35 int (*kick_ap_alive)(unsigned cpu, struct task_struct *tidle);
36 int (*cpu_disable)(void);
37 void (*cpu_die)(unsigned int cpu);
38 void (*play_dead)(void);
39 void (*stop_this_cpu)(void);
40
41 void (*send_call_func_ipi)(const struct cpumask *mask);
42 void (*send_call_func_single_ipi)(int cpu);
43};
44
45/* Globals due to paravirt */
46extern void set_cpu_sibling_map(int cpu);
47
48#ifdef CONFIG_SMP
49extern struct smp_ops smp_ops;
50
51static inline void smp_send_stop(void)
52{
53 smp_ops.stop_other_cpus(0);
54}
55
56static inline void stop_other_cpus(void)
57{
58 smp_ops.stop_other_cpus(1);
59}
60
61static inline void smp_prepare_cpus(unsigned int max_cpus)
62{
63 smp_ops.smp_prepare_cpus(max_cpus);
64}
65
66static inline void smp_cpus_done(unsigned int max_cpus)
67{
68 smp_ops.smp_cpus_done(max_cpus);
69}
70
71static inline int __cpu_disable(void)
72{
73 return smp_ops.cpu_disable();
74}
75
76static inline void __cpu_die(unsigned int cpu)
77{
78 if (smp_ops.cpu_die)
79 smp_ops.cpu_die(cpu);
80}
81
82static inline void __noreturn play_dead(void)
83{
84 smp_ops.play_dead();
85 BUG();
86}
87
88static inline void arch_smp_send_reschedule(int cpu)
89{
90 smp_ops.smp_send_reschedule(cpu);
91}
92
93static inline void arch_send_call_function_single_ipi(int cpu)
94{
95 smp_ops.send_call_func_single_ipi(cpu);
96}
97
98static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
99{
100 smp_ops.send_call_func_ipi(mask);
101}
102
103void cpu_disable_common(void);
104void native_smp_prepare_boot_cpu(void);
105void smp_prepare_cpus_common(void);
106void native_smp_prepare_cpus(unsigned int max_cpus);
107void native_smp_cpus_done(unsigned int max_cpus);
108int common_cpu_up(unsigned int cpunum, struct task_struct *tidle);
109int native_kick_ap(unsigned int cpu, struct task_struct *tidle);
110int native_cpu_disable(void);
111void __noreturn hlt_play_dead(void);
112void __noreturn native_play_dead(void);
113void play_dead_common(void);
114void wbinvd_on_cpu(int cpu);
115void wbinvd_on_all_cpus(void);
116void wbinvd_on_cpus_mask(struct cpumask *cpus);
117void wbnoinvd_on_all_cpus(void);
118void wbnoinvd_on_cpus_mask(struct cpumask *cpus);
119
120void smp_kick_mwait_play_dead(void);
121void __noreturn mwait_play_dead(unsigned int eax_hint);
122
123void native_smp_send_reschedule(int cpu);
124void native_send_call_func_ipi(const struct cpumask *mask);
125void native_send_call_func_single_ipi(int cpu);
126
127asmlinkage __visible void smp_reboot_interrupt(void);
128__visible void smp_reschedule_interrupt(struct pt_regs *regs);
129__visible void smp_call_function_interrupt(struct pt_regs *regs);
130__visible void smp_call_function_single_interrupt(struct pt_regs *r);
131
132#define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
133#define cpu_acpi_id(cpu) per_cpu(x86_cpu_to_acpiid, cpu)
134
135/*
136 * This function is needed by all SMP systems. It must _always_ be valid
137 * from the initial startup.
138 */
139#define raw_smp_processor_id() this_cpu_read(cpu_number)
140#define __smp_processor_id() __this_cpu_read(cpu_number)
141
142static inline struct cpumask *cpu_llc_shared_mask(int cpu)
143{
144 return per_cpu(cpu_llc_shared_map, cpu);
145}
146
147static inline struct cpumask *cpu_l2c_shared_mask(int cpu)
148{
149 return per_cpu(cpu_l2c_shared_map, cpu);
150}
151
152#else /* !CONFIG_SMP */
153#define wbinvd_on_cpu(cpu) wbinvd()
154static inline void wbinvd_on_all_cpus(void)
155{
156 wbinvd();
157}
158
159static inline void wbinvd_on_cpus_mask(struct cpumask *cpus)
160{
161 wbinvd();
162}
163
164static inline void wbnoinvd_on_all_cpus(void)
165{
166 wbnoinvd();
167}
168
169static inline void wbnoinvd_on_cpus_mask(struct cpumask *cpus)
170{
171 wbnoinvd();
172}
173
174static inline struct cpumask *cpu_llc_shared_mask(int cpu)
175{
176 return (struct cpumask *)cpumask_of(0);
177}
178
179static inline void __noreturn mwait_play_dead(unsigned int eax_hint) { BUG(); }
180#endif /* CONFIG_SMP */
181
182#ifdef CONFIG_DEBUG_NMI_SELFTEST
183extern void nmi_selftest(void);
184#else
185#define nmi_selftest() do { } while (0)
186#endif
187
188extern unsigned int smpboot_control;
189extern unsigned long apic_mmio_base;
190
191#endif /* !__ASSEMBLER__ */
192
193/* Control bits for startup_64 */
194#define STARTUP_READ_APICID 0x80000000
195
196/* Top 8 bits are reserved for control */
197#define STARTUP_PARALLEL_MASK 0xFF000000
198
199#endif /* _ASM_X86_SMP_H */
200

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