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(cpumask_var_t, cpu_l2c_shared_map);
20 DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_llc_id);
21 DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_l2c_id);
22 DECLARE_PER_CPU_READ_MOSTLY(int, cpu_number);
23
cpu_llc_shared_mask(int cpu)24 static inline struct cpumask *cpu_llc_shared_mask(int cpu)
25 {
26 return per_cpu(cpu_llc_shared_map, cpu);
27 }
28
cpu_l2c_shared_mask(int cpu)29 static inline struct cpumask *cpu_l2c_shared_mask(int cpu)
30 {
31 return per_cpu(cpu_l2c_shared_map, cpu);
32 }
33
34 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid);
35 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid);
36 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid);
37 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
38 DECLARE_EARLY_PER_CPU_READ_MOSTLY(int, x86_cpu_to_logical_apicid);
39 #endif
40
41 struct task_struct;
42
43 struct smp_ops {
44 void (*smp_prepare_boot_cpu)(void);
45 void (*smp_prepare_cpus)(unsigned max_cpus);
46 void (*smp_cpus_done)(unsigned max_cpus);
47
48 void (*stop_other_cpus)(int wait);
49 void (*crash_stop_other_cpus)(void);
50 void (*smp_send_reschedule)(int cpu);
51
52 int (*cpu_up)(unsigned cpu, struct task_struct *tidle);
53 int (*cpu_disable)(void);
54 void (*cpu_die)(unsigned int cpu);
55 void (*play_dead)(void);
56
57 void (*send_call_func_ipi)(const struct cpumask *mask);
58 void (*send_call_func_single_ipi)(int cpu);
59 };
60
61 /* Globals due to paravirt */
62 extern void set_cpu_sibling_map(int cpu);
63
64 #ifdef CONFIG_SMP
65 extern struct smp_ops smp_ops;
66
smp_send_stop(void)67 static inline void smp_send_stop(void)
68 {
69 smp_ops.stop_other_cpus(0);
70 }
71
stop_other_cpus(void)72 static inline void stop_other_cpus(void)
73 {
74 smp_ops.stop_other_cpus(1);
75 }
76
smp_prepare_boot_cpu(void)77 static inline void smp_prepare_boot_cpu(void)
78 {
79 smp_ops.smp_prepare_boot_cpu();
80 }
81
smp_prepare_cpus(unsigned int max_cpus)82 static inline void smp_prepare_cpus(unsigned int max_cpus)
83 {
84 smp_ops.smp_prepare_cpus(max_cpus);
85 }
86
smp_cpus_done(unsigned int max_cpus)87 static inline void smp_cpus_done(unsigned int max_cpus)
88 {
89 smp_ops.smp_cpus_done(max_cpus);
90 }
91
__cpu_up(unsigned int cpu,struct task_struct * tidle)92 static inline int __cpu_up(unsigned int cpu, struct task_struct *tidle)
93 {
94 return smp_ops.cpu_up(cpu, tidle);
95 }
96
__cpu_disable(void)97 static inline int __cpu_disable(void)
98 {
99 return smp_ops.cpu_disable();
100 }
101
__cpu_die(unsigned int cpu)102 static inline void __cpu_die(unsigned int cpu)
103 {
104 smp_ops.cpu_die(cpu);
105 }
106
play_dead(void)107 static inline void play_dead(void)
108 {
109 smp_ops.play_dead();
110 }
111
smp_send_reschedule(int cpu)112 static inline void smp_send_reschedule(int cpu)
113 {
114 smp_ops.smp_send_reschedule(cpu);
115 }
116
arch_send_call_function_single_ipi(int cpu)117 static inline void arch_send_call_function_single_ipi(int cpu)
118 {
119 smp_ops.send_call_func_single_ipi(cpu);
120 }
121
arch_send_call_function_ipi_mask(const struct cpumask * mask)122 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
123 {
124 smp_ops.send_call_func_ipi(mask);
125 }
126
127 void cpu_disable_common(void);
128 void native_smp_prepare_boot_cpu(void);
129 void smp_prepare_cpus_common(void);
130 void native_smp_prepare_cpus(unsigned int max_cpus);
131 void calculate_max_logical_packages(void);
132 void native_smp_cpus_done(unsigned int max_cpus);
133 int common_cpu_up(unsigned int cpunum, struct task_struct *tidle);
134 int native_cpu_up(unsigned int cpunum, struct task_struct *tidle);
135 int native_cpu_disable(void);
136 int common_cpu_die(unsigned int cpu);
137 void native_cpu_die(unsigned int cpu);
138 void hlt_play_dead(void);
139 void native_play_dead(void);
140 void play_dead_common(void);
141 void wbinvd_on_cpu(int cpu);
142 int wbinvd_on_all_cpus(void);
143 void cond_wakeup_cpu0(void);
144
145 void native_smp_send_reschedule(int cpu);
146 void native_send_call_func_ipi(const struct cpumask *mask);
147 void native_send_call_func_single_ipi(int cpu);
148 void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle);
149
150 void smp_store_boot_cpu_info(void);
151 void smp_store_cpu_info(int id);
152
153 asmlinkage __visible void smp_reboot_interrupt(void);
154 __visible void smp_reschedule_interrupt(struct pt_regs *regs);
155 __visible void smp_call_function_interrupt(struct pt_regs *regs);
156 __visible void smp_call_function_single_interrupt(struct pt_regs *r);
157
158 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
159 #define cpu_acpi_id(cpu) per_cpu(x86_cpu_to_acpiid, cpu)
160
161 /*
162 * This function is needed by all SMP systems. It must _always_ be valid
163 * from the initial startup. We map APIC_BASE very early in page_setup(),
164 * so this is correct in the x86 case.
165 */
166 #define raw_smp_processor_id() this_cpu_read(cpu_number)
167 #define __smp_processor_id() __this_cpu_read(cpu_number)
168
169 #ifdef CONFIG_X86_32
170 extern int safe_smp_processor_id(void);
171 #else
172 # define safe_smp_processor_id() smp_processor_id()
173 #endif
174
175 #else /* !CONFIG_SMP */
176 #define wbinvd_on_cpu(cpu) wbinvd()
wbinvd_on_all_cpus(void)177 static inline int wbinvd_on_all_cpus(void)
178 {
179 wbinvd();
180 return 0;
181 }
182 #endif /* CONFIG_SMP */
183
184 extern unsigned disabled_cpus;
185
186 #ifdef CONFIG_X86_LOCAL_APIC
187 extern int hard_smp_processor_id(void);
188
189 #else /* CONFIG_X86_LOCAL_APIC */
190 #define hard_smp_processor_id() 0
191 #endif /* CONFIG_X86_LOCAL_APIC */
192
193 #ifdef CONFIG_DEBUG_NMI_SELFTEST
194 extern void nmi_selftest(void);
195 #else
196 #define nmi_selftest() do { } while (0)
197 #endif
198
199 #endif /* __ASSEMBLY__ */
200 #endif /* _ASM_X86_SMP_H */
201