xref: /linux/arch/x86/include/asm/smp.h (revision b48543c451c30387b53ee6e202dda8d5303f6268)
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 
11 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_sibling_map);
12 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_map);
13 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_die_map);
14 /* cpus sharing the last level cache: */
15 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map);
16 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_l2c_shared_map);
17 
18 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_apicid);
19 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid);
20 
21 struct task_struct;
22 
23 struct smp_ops {
24 	void (*smp_prepare_boot_cpu)(void);
25 	void (*smp_prepare_cpus)(unsigned max_cpus);
26 	void (*smp_cpus_done)(unsigned max_cpus);
27 
28 	void (*stop_other_cpus)(int wait);
29 	void (*crash_stop_other_cpus)(void);
30 	void (*smp_send_reschedule)(int cpu);
31 
32 	void (*cleanup_dead_cpu)(unsigned cpu);
33 	void (*poll_sync_state)(void);
34 	int (*kick_ap_alive)(unsigned cpu, struct task_struct *tidle);
35 	int (*cpu_disable)(void);
36 	void (*cpu_die)(unsigned int cpu);
37 	void (*play_dead)(void);
38 	void (*stop_this_cpu)(void);
39 
40 	void (*send_call_func_ipi)(const struct cpumask *mask);
41 	void (*send_call_func_single_ipi)(int cpu);
42 };
43 
44 /* Globals due to paravirt */
45 extern void set_cpu_sibling_map(int cpu);
46 
47 #ifdef CONFIG_SMP
48 extern struct smp_ops smp_ops;
49 
50 static inline void smp_send_stop(void)
51 {
52 	smp_ops.stop_other_cpus(0);
53 }
54 
55 static inline void stop_other_cpus(void)
56 {
57 	smp_ops.stop_other_cpus(1);
58 }
59 
60 static inline void smp_prepare_cpus(unsigned int max_cpus)
61 {
62 	smp_ops.smp_prepare_cpus(max_cpus);
63 }
64 
65 static inline void smp_cpus_done(unsigned int max_cpus)
66 {
67 	smp_ops.smp_cpus_done(max_cpus);
68 }
69 
70 static inline int __cpu_disable(void)
71 {
72 	return smp_ops.cpu_disable();
73 }
74 
75 static inline void __cpu_die(unsigned int cpu)
76 {
77 	if (smp_ops.cpu_die)
78 		smp_ops.cpu_die(cpu);
79 }
80 
81 static inline void __noreturn play_dead(void)
82 {
83 	smp_ops.play_dead();
84 	BUG();
85 }
86 
87 static inline void arch_smp_send_reschedule(int cpu)
88 {
89 	smp_ops.smp_send_reschedule(cpu);
90 }
91 
92 static inline void arch_send_call_function_single_ipi(int cpu)
93 {
94 	smp_ops.send_call_func_single_ipi(cpu);
95 }
96 
97 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
98 {
99 	smp_ops.send_call_func_ipi(mask);
100 }
101 
102 void cpu_disable_common(void);
103 void native_smp_prepare_boot_cpu(void);
104 void smp_prepare_cpus_common(void);
105 void native_smp_prepare_cpus(unsigned int max_cpus);
106 void native_smp_cpus_done(unsigned int max_cpus);
107 int common_cpu_up(unsigned int cpunum, struct task_struct *tidle);
108 int native_kick_ap(unsigned int cpu, struct task_struct *tidle);
109 int native_cpu_disable(void);
110 void __noreturn hlt_play_dead(void);
111 void native_play_dead(void);
112 void play_dead_common(void);
113 void wbinvd_on_cpu(int cpu);
114 int wbinvd_on_all_cpus(void);
115 
116 void smp_kick_mwait_play_dead(void);
117 
118 void native_smp_send_reschedule(int cpu);
119 void native_send_call_func_ipi(const struct cpumask *mask);
120 void native_send_call_func_single_ipi(int cpu);
121 
122 void smp_store_cpu_info(int id);
123 
124 asmlinkage __visible void smp_reboot_interrupt(void);
125 __visible void smp_reschedule_interrupt(struct pt_regs *regs);
126 __visible void smp_call_function_interrupt(struct pt_regs *regs);
127 __visible void smp_call_function_single_interrupt(struct pt_regs *r);
128 
129 #define cpu_physical_id(cpu)	per_cpu(x86_cpu_to_apicid, cpu)
130 #define cpu_acpi_id(cpu)	per_cpu(x86_cpu_to_acpiid, cpu)
131 
132 /*
133  * This function is needed by all SMP systems. It must _always_ be valid
134  * from the initial startup.
135  */
136 #define raw_smp_processor_id()  this_cpu_read(pcpu_hot.cpu_number)
137 #define __smp_processor_id() __this_cpu_read(pcpu_hot.cpu_number)
138 
139 #ifdef CONFIG_X86_32
140 extern int safe_smp_processor_id(void);
141 #else
142 # define safe_smp_processor_id()	smp_processor_id()
143 #endif
144 
145 static inline struct cpumask *cpu_llc_shared_mask(int cpu)
146 {
147 	return per_cpu(cpu_llc_shared_map, cpu);
148 }
149 
150 static inline struct cpumask *cpu_l2c_shared_mask(int cpu)
151 {
152 	return per_cpu(cpu_l2c_shared_map, cpu);
153 }
154 
155 #else /* !CONFIG_SMP */
156 #define wbinvd_on_cpu(cpu)     wbinvd()
157 static inline int wbinvd_on_all_cpus(void)
158 {
159 	wbinvd();
160 	return 0;
161 }
162 
163 static inline struct cpumask *cpu_llc_shared_mask(int cpu)
164 {
165 	return (struct cpumask *)cpumask_of(0);
166 }
167 #endif /* CONFIG_SMP */
168 
169 #ifdef CONFIG_DEBUG_NMI_SELFTEST
170 extern void nmi_selftest(void);
171 #else
172 #define nmi_selftest() do { } while (0)
173 #endif
174 
175 extern unsigned int smpboot_control;
176 extern unsigned long apic_mmio_base;
177 
178 #endif /* !__ASSEMBLY__ */
179 
180 /* Control bits for startup_64 */
181 #define STARTUP_READ_APICID	0x80000000
182 
183 /* Top 8 bits are reserved for control */
184 #define STARTUP_PARALLEL_MASK	0xFF000000
185 
186 #endif /* _ASM_X86_SMP_H */
187