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1#ifndef _ASM_X86_SMP_H
2#define _ASM_X86_SMP_H
3#ifndef __ASSEMBLY__
4#include <linux/cpumask.h>
5#include <asm/percpu.h>
6
7/*
8 * We need the APIC definitions automatically as part of 'smp.h'
9 */
10#ifdef CONFIG_X86_LOCAL_APIC
11# include <asm/mpspec.h>
12# include <asm/apic.h>
13# ifdef CONFIG_X86_IO_APIC
14# include <asm/io_apic.h>
15# endif
16#endif
17#include <asm/thread_info.h>
18#include <asm/cpumask.h>
19
20extern int smp_num_siblings;
21extern unsigned int num_processors;
22
23DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_sibling_map);
24DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_map);
25/* cpus sharing the last level cache: */
26DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map);
27DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_llc_id);
28DECLARE_PER_CPU_READ_MOSTLY(int, cpu_number);
29
30static inline struct cpumask *cpu_llc_shared_mask(int cpu)
31{
32 return per_cpu(cpu_llc_shared_map, cpu);
33}
34
35DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid);
36DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid);
37DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid);
38#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
39DECLARE_EARLY_PER_CPU_READ_MOSTLY(int, x86_cpu_to_logical_apicid);
40#endif
41
42struct task_struct;
43
44struct smp_ops {
45 void (*smp_prepare_boot_cpu)(void);
46 void (*smp_prepare_cpus)(unsigned max_cpus);
47 void (*smp_cpus_done)(unsigned max_cpus);
48
49 void (*stop_other_cpus)(int wait);
50 void (*crash_stop_other_cpus)(void);
51 void (*smp_send_reschedule)(int cpu);
52
53 int (*cpu_up)(unsigned cpu, struct task_struct *tidle);
54 int (*cpu_disable)(void);
55 void (*cpu_die)(unsigned int cpu);
56 void (*play_dead)(void);
57
58 void (*send_call_func_ipi)(const struct cpumask *mask);
59 void (*send_call_func_single_ipi)(int cpu);
60};
61
62/* Globals due to paravirt */
63extern void set_cpu_sibling_map(int cpu);
64
65#ifdef CONFIG_SMP
66extern struct smp_ops smp_ops;
67
68static inline void smp_send_stop(void)
69{
70 smp_ops.stop_other_cpus(0);
71}
72
73static inline void stop_other_cpus(void)
74{
75 smp_ops.stop_other_cpus(1);
76}
77
78static inline void smp_prepare_boot_cpu(void)
79{
80 smp_ops.smp_prepare_boot_cpu();
81}
82
83static inline void smp_prepare_cpus(unsigned int max_cpus)
84{
85 smp_ops.smp_prepare_cpus(max_cpus);
86}
87
88static inline void smp_cpus_done(unsigned int max_cpus)
89{
90 smp_ops.smp_cpus_done(max_cpus);
91}
92
93static inline int __cpu_up(unsigned int cpu, struct task_struct *tidle)
94{
95 return smp_ops.cpu_up(cpu, tidle);
96}
97
98static inline int __cpu_disable(void)
99{
100 return smp_ops.cpu_disable();
101}
102
103static inline void __cpu_die(unsigned int cpu)
104{
105 smp_ops.cpu_die(cpu);
106}
107
108static inline void play_dead(void)
109{
110 smp_ops.play_dead();
111}
112
113static inline void smp_send_reschedule(int cpu)
114{
115 smp_ops.smp_send_reschedule(cpu);
116}
117
118static inline void arch_send_call_function_single_ipi(int cpu)
119{
120 smp_ops.send_call_func_single_ipi(cpu);
121}
122
123static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
124{
125 smp_ops.send_call_func_ipi(mask);
126}
127
128void cpu_disable_common(void);
129void native_smp_prepare_boot_cpu(void);
130void native_smp_prepare_cpus(unsigned int max_cpus);
131void native_smp_cpus_done(unsigned int max_cpus);
132void common_cpu_up(unsigned int cpunum, struct task_struct *tidle);
133int native_cpu_up(unsigned int cpunum, struct task_struct *tidle);
134int native_cpu_disable(void);
135int common_cpu_die(unsigned int cpu);
136void native_cpu_die(unsigned int cpu);
137void hlt_play_dead(void);
138void native_play_dead(void);
139void play_dead_common(void);
140void wbinvd_on_cpu(int cpu);
141int wbinvd_on_all_cpus(void);
142
143void native_send_call_func_ipi(const struct cpumask *mask);
144void native_send_call_func_single_ipi(int cpu);
145void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle);
146
147void smp_store_boot_cpu_info(void);
148void smp_store_cpu_info(int id);
149#define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
150#define cpu_acpi_id(cpu) per_cpu(x86_cpu_to_acpiid, cpu)
151
152#else /* !CONFIG_SMP */
153#define wbinvd_on_cpu(cpu) wbinvd()
154static inline int wbinvd_on_all_cpus(void)
155{
156 wbinvd();
157 return 0;
158}
159#define smp_num_siblings 1
160#endif /* CONFIG_SMP */
161
162extern unsigned disabled_cpus;
163
164#ifdef CONFIG_X86_32_SMP
165/*
166 * This function is needed by all SMP systems. It must _always_ be valid
167 * from the initial startup. We map APIC_BASE very early in page_setup(),
168 * so this is correct in the x86 case.
169 */
170#define raw_smp_processor_id() (this_cpu_read(cpu_number))
171extern int safe_smp_processor_id(void);
172
173#elif defined(CONFIG_X86_64_SMP)
174#define raw_smp_processor_id() (this_cpu_read(cpu_number))
175
176#define safe_smp_processor_id() smp_processor_id()
177
178#endif
179
180#ifdef CONFIG_X86_LOCAL_APIC
181
182#ifndef CONFIG_X86_64
183static inline int logical_smp_processor_id(void)
184{
185 /* we don't want to mark this access volatile - bad code generation */
186 return GET_APIC_LOGICAL_ID(apic_read(APIC_LDR));
187}
188
189#endif
190
191extern int hard_smp_processor_id(void);
192
193#else /* CONFIG_X86_LOCAL_APIC */
194
195# ifndef CONFIG_SMP
196# define hard_smp_processor_id() 0
197# endif
198
199#endif /* CONFIG_X86_LOCAL_APIC */
200
201#ifdef CONFIG_DEBUG_NMI_SELFTEST
202extern void nmi_selftest(void);
203#else
204#define nmi_selftest() do { } while (0)
205#endif
206
207#endif /* __ASSEMBLY__ */
208#endif /* _ASM_X86_SMP_H */
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);
20DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_llc_id);
21DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_l2c_id);
22
23DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid);
24DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid);
25DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid);
26#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
27DECLARE_EARLY_PER_CPU_READ_MOSTLY(int, x86_cpu_to_logical_apicid);
28#endif
29
30struct task_struct;
31
32struct smp_ops {
33 void (*smp_prepare_boot_cpu)(void);
34 void (*smp_prepare_cpus)(unsigned max_cpus);
35 void (*smp_cpus_done)(unsigned max_cpus);
36
37 void (*stop_other_cpus)(int wait);
38 void (*crash_stop_other_cpus)(void);
39 void (*smp_send_reschedule)(int cpu);
40
41 int (*cpu_up)(unsigned cpu, struct task_struct *tidle);
42 int (*cpu_disable)(void);
43 void (*cpu_die)(unsigned int cpu);
44 void (*play_dead)(void);
45
46 void (*send_call_func_ipi)(const struct cpumask *mask);
47 void (*send_call_func_single_ipi)(int cpu);
48};
49
50/* Globals due to paravirt */
51extern void set_cpu_sibling_map(int cpu);
52
53#ifdef CONFIG_SMP
54extern struct smp_ops smp_ops;
55
56static inline void smp_send_stop(void)
57{
58 smp_ops.stop_other_cpus(0);
59}
60
61static inline void stop_other_cpus(void)
62{
63 smp_ops.stop_other_cpus(1);
64}
65
66static inline void smp_prepare_boot_cpu(void)
67{
68 smp_ops.smp_prepare_boot_cpu();
69}
70
71static inline void smp_prepare_cpus(unsigned int max_cpus)
72{
73 smp_ops.smp_prepare_cpus(max_cpus);
74}
75
76static inline void smp_cpus_done(unsigned int max_cpus)
77{
78 smp_ops.smp_cpus_done(max_cpus);
79}
80
81static inline int __cpu_up(unsigned int cpu, struct task_struct *tidle)
82{
83 return smp_ops.cpu_up(cpu, tidle);
84}
85
86static inline int __cpu_disable(void)
87{
88 return smp_ops.cpu_disable();
89}
90
91static inline void __cpu_die(unsigned int cpu)
92{
93 smp_ops.cpu_die(cpu);
94}
95
96static inline void play_dead(void)
97{
98 smp_ops.play_dead();
99}
100
101static inline void smp_send_reschedule(int cpu)
102{
103 smp_ops.smp_send_reschedule(cpu);
104}
105
106static inline void arch_send_call_function_single_ipi(int cpu)
107{
108 smp_ops.send_call_func_single_ipi(cpu);
109}
110
111static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
112{
113 smp_ops.send_call_func_ipi(mask);
114}
115
116void cpu_disable_common(void);
117void native_smp_prepare_boot_cpu(void);
118void smp_prepare_cpus_common(void);
119void native_smp_prepare_cpus(unsigned int max_cpus);
120void calculate_max_logical_packages(void);
121void native_smp_cpus_done(unsigned int max_cpus);
122int common_cpu_up(unsigned int cpunum, struct task_struct *tidle);
123int native_cpu_up(unsigned int cpunum, struct task_struct *tidle);
124int native_cpu_disable(void);
125int common_cpu_die(unsigned int cpu);
126void native_cpu_die(unsigned int cpu);
127void hlt_play_dead(void);
128void native_play_dead(void);
129void play_dead_common(void);
130void wbinvd_on_cpu(int cpu);
131int wbinvd_on_all_cpus(void);
132void cond_wakeup_cpu0(void);
133
134void native_smp_send_reschedule(int cpu);
135void native_send_call_func_ipi(const struct cpumask *mask);
136void native_send_call_func_single_ipi(int cpu);
137void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle);
138
139void smp_store_boot_cpu_info(void);
140void smp_store_cpu_info(int id);
141
142asmlinkage __visible void smp_reboot_interrupt(void);
143__visible void smp_reschedule_interrupt(struct pt_regs *regs);
144__visible void smp_call_function_interrupt(struct pt_regs *regs);
145__visible void smp_call_function_single_interrupt(struct pt_regs *r);
146
147#define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
148#define cpu_acpi_id(cpu) per_cpu(x86_cpu_to_acpiid, cpu)
149
150/*
151 * This function is needed by all SMP systems. It must _always_ be valid
152 * from the initial startup.
153 */
154#define raw_smp_processor_id() this_cpu_read(pcpu_hot.cpu_number)
155#define __smp_processor_id() __this_cpu_read(pcpu_hot.cpu_number)
156
157#ifdef CONFIG_X86_32
158extern int safe_smp_processor_id(void);
159#else
160# define safe_smp_processor_id() smp_processor_id()
161#endif
162
163static inline struct cpumask *cpu_llc_shared_mask(int cpu)
164{
165 return per_cpu(cpu_llc_shared_map, cpu);
166}
167
168static inline struct cpumask *cpu_l2c_shared_mask(int cpu)
169{
170 return per_cpu(cpu_l2c_shared_map, cpu);
171}
172
173#else /* !CONFIG_SMP */
174#define wbinvd_on_cpu(cpu) wbinvd()
175static inline int wbinvd_on_all_cpus(void)
176{
177 wbinvd();
178 return 0;
179}
180
181static inline struct cpumask *cpu_llc_shared_mask(int cpu)
182{
183 return (struct cpumask *)cpumask_of(0);
184}
185#endif /* CONFIG_SMP */
186
187extern unsigned disabled_cpus;
188
189#ifdef CONFIG_X86_LOCAL_APIC
190extern int hard_smp_processor_id(void);
191
192#else /* CONFIG_X86_LOCAL_APIC */
193#define hard_smp_processor_id() 0
194#endif /* CONFIG_X86_LOCAL_APIC */
195
196#ifdef CONFIG_DEBUG_NMI_SELFTEST
197extern void nmi_selftest(void);
198#else
199#define nmi_selftest() do { } while (0)
200#endif
201
202#endif /* __ASSEMBLY__ */
203#endif /* _ASM_X86_SMP_H */