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 #include <asm/percpu.h>
7
8 /*
9 * We need the APIC definitions automatically as part of 'smp.h'
10 */
11 #ifdef CONFIG_X86_LOCAL_APIC
12 # include <asm/mpspec.h>
13 # include <asm/apic.h>
14 # ifdef CONFIG_X86_IO_APIC
15 # include <asm/io_apic.h>
16 # endif
17 #endif
18 #include <asm/thread_info.h>
19 #include <asm/cpumask.h>
20
21 extern int smp_num_siblings;
22 extern unsigned int num_processors;
23
24 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_sibling_map);
25 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_map);
26 /* cpus sharing the last level cache: */
27 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map);
28 DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_llc_id);
29 DECLARE_PER_CPU_READ_MOSTLY(int, cpu_number);
30
cpu_llc_shared_mask(int cpu)31 static inline struct cpumask *cpu_llc_shared_mask(int cpu)
32 {
33 return per_cpu(cpu_llc_shared_map, cpu);
34 }
35
36 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid);
37 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid);
38 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid);
39 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
40 DECLARE_EARLY_PER_CPU_READ_MOSTLY(int, x86_cpu_to_logical_apicid);
41 #endif
42
43 struct task_struct;
44
45 struct smp_ops {
46 void (*smp_prepare_boot_cpu)(void);
47 void (*smp_prepare_cpus)(unsigned max_cpus);
48 void (*smp_cpus_done)(unsigned max_cpus);
49
50 void (*stop_other_cpus)(int wait);
51 void (*crash_stop_other_cpus)(void);
52 void (*smp_send_reschedule)(int cpu);
53
54 int (*cpu_up)(unsigned cpu, struct task_struct *tidle);
55 int (*cpu_disable)(void);
56 void (*cpu_die)(unsigned int cpu);
57 void (*play_dead)(void);
58
59 void (*send_call_func_ipi)(const struct cpumask *mask);
60 void (*send_call_func_single_ipi)(int cpu);
61 };
62
63 /* Globals due to paravirt */
64 extern void set_cpu_sibling_map(int cpu);
65
66 #ifdef CONFIG_SMP
67 extern struct smp_ops smp_ops;
68
smp_send_stop(void)69 static inline void smp_send_stop(void)
70 {
71 smp_ops.stop_other_cpus(0);
72 }
73
stop_other_cpus(void)74 static inline void stop_other_cpus(void)
75 {
76 smp_ops.stop_other_cpus(1);
77 }
78
smp_prepare_boot_cpu(void)79 static inline void smp_prepare_boot_cpu(void)
80 {
81 smp_ops.smp_prepare_boot_cpu();
82 }
83
smp_prepare_cpus(unsigned int max_cpus)84 static inline void smp_prepare_cpus(unsigned int max_cpus)
85 {
86 smp_ops.smp_prepare_cpus(max_cpus);
87 }
88
smp_cpus_done(unsigned int max_cpus)89 static inline void smp_cpus_done(unsigned int max_cpus)
90 {
91 smp_ops.smp_cpus_done(max_cpus);
92 }
93
__cpu_up(unsigned int cpu,struct task_struct * tidle)94 static inline int __cpu_up(unsigned int cpu, struct task_struct *tidle)
95 {
96 return smp_ops.cpu_up(cpu, tidle);
97 }
98
__cpu_disable(void)99 static inline int __cpu_disable(void)
100 {
101 return smp_ops.cpu_disable();
102 }
103
__cpu_die(unsigned int cpu)104 static inline void __cpu_die(unsigned int cpu)
105 {
106 smp_ops.cpu_die(cpu);
107 }
108
play_dead(void)109 static inline void play_dead(void)
110 {
111 smp_ops.play_dead();
112 }
113
smp_send_reschedule(int cpu)114 static inline void smp_send_reschedule(int cpu)
115 {
116 smp_ops.smp_send_reschedule(cpu);
117 }
118
arch_send_call_function_single_ipi(int cpu)119 static inline void arch_send_call_function_single_ipi(int cpu)
120 {
121 smp_ops.send_call_func_single_ipi(cpu);
122 }
123
arch_send_call_function_ipi_mask(const struct cpumask * mask)124 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
125 {
126 smp_ops.send_call_func_ipi(mask);
127 }
128
129 void cpu_disable_common(void);
130 void native_smp_prepare_boot_cpu(void);
131 void native_smp_prepare_cpus(unsigned int max_cpus);
132 void calculate_max_logical_packages(void);
133 void native_smp_cpus_done(unsigned int max_cpus);
134 void common_cpu_up(unsigned int cpunum, struct task_struct *tidle);
135 int native_cpu_up(unsigned int cpunum, struct task_struct *tidle);
136 int native_cpu_disable(void);
137 int common_cpu_die(unsigned int cpu);
138 void native_cpu_die(unsigned int cpu);
139 void hlt_play_dead(void);
140 void native_play_dead(void);
141 void play_dead_common(void);
142 void wbinvd_on_cpu(int cpu);
143 int wbinvd_on_all_cpus(void);
144
145 void native_send_call_func_ipi(const struct cpumask *mask);
146 void native_send_call_func_single_ipi(int cpu);
147 void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle);
148
149 void smp_store_boot_cpu_info(void);
150 void smp_store_cpu_info(int id);
151 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
152 #define cpu_acpi_id(cpu) per_cpu(x86_cpu_to_acpiid, cpu)
153
154 /*
155 * This function is needed by all SMP systems. It must _always_ be valid
156 * from the initial startup. We map APIC_BASE very early in page_setup(),
157 * so this is correct in the x86 case.
158 */
159 #define raw_smp_processor_id() (this_cpu_read(cpu_number))
160
161 #ifdef CONFIG_X86_32
162 extern int safe_smp_processor_id(void);
163 #else
164 # define safe_smp_processor_id() smp_processor_id()
165 #endif
166
167 #else /* !CONFIG_SMP */
168 #define wbinvd_on_cpu(cpu) wbinvd()
wbinvd_on_all_cpus(void)169 static inline int wbinvd_on_all_cpus(void)
170 {
171 wbinvd();
172 return 0;
173 }
174 #endif /* CONFIG_SMP */
175
176 extern unsigned disabled_cpus;
177
178 #ifdef CONFIG_X86_LOCAL_APIC
179 extern int hard_smp_processor_id(void);
180
181 #else /* CONFIG_X86_LOCAL_APIC */
182 #define hard_smp_processor_id() 0
183 #endif /* CONFIG_X86_LOCAL_APIC */
184
185 #ifdef CONFIG_DEBUG_NMI_SELFTEST
186 extern void nmi_selftest(void);
187 #else
188 #define nmi_selftest() do { } while (0)
189 #endif
190
191 #endif /* __ASSEMBLY__ */
192 #endif /* _ASM_X86_SMP_H */
193
