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 #include <asm/thread_info.h>
9 #include <asm/cpumask.h>
10
11 extern int smp_num_siblings;
12 extern unsigned int num_processors;
13
14 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_sibling_map);
15 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_map);
16 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_die_map);
17 /* cpus sharing the last level cache: */
18 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map);
19 DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_llc_id);
20 DECLARE_PER_CPU_READ_MOSTLY(int, cpu_number);
21
cpu_llc_shared_mask(int cpu)22 static inline struct cpumask *cpu_llc_shared_mask(int cpu)
23 {
24 return per_cpu(cpu_llc_shared_map, cpu);
25 }
26
27 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid);
28 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid);
29 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid);
30 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
31 DECLARE_EARLY_PER_CPU_READ_MOSTLY(int, x86_cpu_to_logical_apicid);
32 #endif
33
34 struct task_struct;
35
36 struct smp_ops {
37 void (*smp_prepare_boot_cpu)(void);
38 void (*smp_prepare_cpus)(unsigned max_cpus);
39 void (*smp_cpus_done)(unsigned max_cpus);
40
41 void (*stop_other_cpus)(int wait);
42 void (*crash_stop_other_cpus)(void);
43 void (*smp_send_reschedule)(int cpu);
44
45 int (*cpu_up)(unsigned cpu, struct task_struct *tidle);
46 int (*cpu_disable)(void);
47 void (*cpu_die)(unsigned int cpu);
48 void (*play_dead)(void);
49
50 void (*send_call_func_ipi)(const struct cpumask *mask);
51 void (*send_call_func_single_ipi)(int cpu);
52 };
53
54 /* Globals due to paravirt */
55 extern void set_cpu_sibling_map(int cpu);
56
57 #ifdef CONFIG_SMP
58 extern struct smp_ops smp_ops;
59
smp_send_stop(void)60 static inline void smp_send_stop(void)
61 {
62 smp_ops.stop_other_cpus(0);
63 }
64
stop_other_cpus(void)65 static inline void stop_other_cpus(void)
66 {
67 smp_ops.stop_other_cpus(1);
68 }
69
smp_prepare_boot_cpu(void)70 static inline void smp_prepare_boot_cpu(void)
71 {
72 smp_ops.smp_prepare_boot_cpu();
73 }
74
smp_prepare_cpus(unsigned int max_cpus)75 static inline void smp_prepare_cpus(unsigned int max_cpus)
76 {
77 smp_ops.smp_prepare_cpus(max_cpus);
78 }
79
smp_cpus_done(unsigned int max_cpus)80 static inline void smp_cpus_done(unsigned int max_cpus)
81 {
82 smp_ops.smp_cpus_done(max_cpus);
83 }
84
__cpu_up(unsigned int cpu,struct task_struct * tidle)85 static inline int __cpu_up(unsigned int cpu, struct task_struct *tidle)
86 {
87 return smp_ops.cpu_up(cpu, tidle);
88 }
89
__cpu_disable(void)90 static inline int __cpu_disable(void)
91 {
92 return smp_ops.cpu_disable();
93 }
94
__cpu_die(unsigned int cpu)95 static inline void __cpu_die(unsigned int cpu)
96 {
97 smp_ops.cpu_die(cpu);
98 }
99
play_dead(void)100 static inline void play_dead(void)
101 {
102 smp_ops.play_dead();
103 }
104
smp_send_reschedule(int cpu)105 static inline void smp_send_reschedule(int cpu)
106 {
107 smp_ops.smp_send_reschedule(cpu);
108 }
109
arch_send_call_function_single_ipi(int cpu)110 static inline void arch_send_call_function_single_ipi(int cpu)
111 {
112 smp_ops.send_call_func_single_ipi(cpu);
113 }
114
arch_send_call_function_ipi_mask(const struct cpumask * mask)115 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
116 {
117 smp_ops.send_call_func_ipi(mask);
118 }
119
120 void cpu_disable_common(void);
121 void native_smp_prepare_boot_cpu(void);
122 void native_smp_prepare_cpus(unsigned int max_cpus);
123 void calculate_max_logical_packages(void);
124 void native_smp_cpus_done(unsigned int max_cpus);
125 int common_cpu_up(unsigned int cpunum, struct task_struct *tidle);
126 int native_cpu_up(unsigned int cpunum, struct task_struct *tidle);
127 int native_cpu_disable(void);
128 int common_cpu_die(unsigned int cpu);
129 void native_cpu_die(unsigned int cpu);
130 void hlt_play_dead(void);
131 void native_play_dead(void);
132 void play_dead_common(void);
133 void wbinvd_on_cpu(int cpu);
134 int wbinvd_on_all_cpus(void);
135 void cond_wakeup_cpu0(void);
136
137 void native_smp_send_reschedule(int cpu);
138 void native_send_call_func_ipi(const struct cpumask *mask);
139 void native_send_call_func_single_ipi(int cpu);
140 void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle);
141
142 void smp_store_boot_cpu_info(void);
143 void smp_store_cpu_info(int id);
144
145 asmlinkage __visible void smp_reboot_interrupt(void);
146 __visible void smp_reschedule_interrupt(struct pt_regs *regs);
147 __visible void smp_call_function_interrupt(struct pt_regs *regs);
148 __visible void smp_call_function_single_interrupt(struct pt_regs *r);
149
150 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
151 #define cpu_acpi_id(cpu) per_cpu(x86_cpu_to_acpiid, cpu)
152
153 /*
154 * This function is needed by all SMP systems. It must _always_ be valid
155 * from the initial startup. We map APIC_BASE very early in page_setup(),
156 * so this is correct in the x86 case.
157 */
158 #define raw_smp_processor_id() this_cpu_read(cpu_number)
159 #define __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