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 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
21 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_apicid);
22 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid);
23
24 struct task_struct;
25
26 struct smp_ops {
27 void (*smp_prepare_boot_cpu)(void);
28 void (*smp_prepare_cpus)(unsigned max_cpus);
29 void (*smp_cpus_done)(unsigned max_cpus);
30
31 void (*stop_other_cpus)(int wait);
32 void (*crash_stop_other_cpus)(void);
33 void (*smp_send_reschedule)(int cpu);
34
35 void (*cleanup_dead_cpu)(unsigned cpu);
36 void (*poll_sync_state)(void);
37 int (*kick_ap_alive)(unsigned cpu, struct task_struct *tidle);
38 int (*cpu_disable)(void);
39 void (*cpu_die)(unsigned int cpu);
40 void (*play_dead)(void);
41
42 void (*send_call_func_ipi)(const struct cpumask *mask);
43 void (*send_call_func_single_ipi)(int cpu);
44 };
45
46 /* Globals due to paravirt */
47 extern void set_cpu_sibling_map(int cpu);
48
49 #ifdef CONFIG_SMP
50 extern struct smp_ops smp_ops;
51
smp_send_stop(void)52 static inline void smp_send_stop(void)
53 {
54 smp_ops.stop_other_cpus(0);
55 }
56
stop_other_cpus(void)57 static inline void stop_other_cpus(void)
58 {
59 smp_ops.stop_other_cpus(1);
60 }
61
smp_prepare_boot_cpu(void)62 static inline void smp_prepare_boot_cpu(void)
63 {
64 smp_ops.smp_prepare_boot_cpu();
65 }
66
smp_prepare_cpus(unsigned int max_cpus)67 static inline void smp_prepare_cpus(unsigned int max_cpus)
68 {
69 smp_ops.smp_prepare_cpus(max_cpus);
70 }
71
smp_cpus_done(unsigned int max_cpus)72 static inline void smp_cpus_done(unsigned int max_cpus)
73 {
74 smp_ops.smp_cpus_done(max_cpus);
75 }
76
__cpu_disable(void)77 static inline int __cpu_disable(void)
78 {
79 return smp_ops.cpu_disable();
80 }
81
__cpu_die(unsigned int cpu)82 static inline void __cpu_die(unsigned int cpu)
83 {
84 if (smp_ops.cpu_die)
85 smp_ops.cpu_die(cpu);
86 }
87
play_dead(void)88 static inline void __noreturn play_dead(void)
89 {
90 smp_ops.play_dead();
91 BUG();
92 }
93
arch_smp_send_reschedule(int cpu)94 static inline void arch_smp_send_reschedule(int cpu)
95 {
96 smp_ops.smp_send_reschedule(cpu);
97 }
98
arch_send_call_function_single_ipi(int cpu)99 static inline void arch_send_call_function_single_ipi(int cpu)
100 {
101 smp_ops.send_call_func_single_ipi(cpu);
102 }
103
arch_send_call_function_ipi_mask(const struct cpumask * mask)104 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
105 {
106 smp_ops.send_call_func_ipi(mask);
107 }
108
109 void cpu_disable_common(void);
110 void native_smp_prepare_boot_cpu(void);
111 void smp_prepare_cpus_common(void);
112 void native_smp_prepare_cpus(unsigned int max_cpus);
113 void calculate_max_logical_packages(void);
114 void native_smp_cpus_done(unsigned int max_cpus);
115 int common_cpu_up(unsigned int cpunum, struct task_struct *tidle);
116 int native_kick_ap(unsigned int cpu, struct task_struct *tidle);
117 int native_cpu_disable(void);
118 void __noreturn hlt_play_dead(void);
119 void native_play_dead(void);
120 void play_dead_common(void);
121 void wbinvd_on_cpu(int cpu);
122 int wbinvd_on_all_cpus(void);
123
124 void smp_kick_mwait_play_dead(void);
125
126 void native_smp_send_reschedule(int cpu);
127 void native_send_call_func_ipi(const struct cpumask *mask);
128 void native_send_call_func_single_ipi(int cpu);
129
130 void smp_store_cpu_info(int id);
131
132 asmlinkage __visible void smp_reboot_interrupt(void);
133 __visible void smp_reschedule_interrupt(struct pt_regs *regs);
134 __visible void smp_call_function_interrupt(struct pt_regs *regs);
135 __visible void smp_call_function_single_interrupt(struct pt_regs *r);
136
137 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
138 #define cpu_acpi_id(cpu) per_cpu(x86_cpu_to_acpiid, cpu)
139
140 /*
141 * This function is needed by all SMP systems. It must _always_ be valid
142 * from the initial startup.
143 */
144 #define raw_smp_processor_id() this_cpu_read(pcpu_hot.cpu_number)
145 #define __smp_processor_id() __this_cpu_read(pcpu_hot.cpu_number)
146
147 #ifdef CONFIG_X86_32
148 extern int safe_smp_processor_id(void);
149 #else
150 # define safe_smp_processor_id() smp_processor_id()
151 #endif
152
cpu_llc_shared_mask(int cpu)153 static inline struct cpumask *cpu_llc_shared_mask(int cpu)
154 {
155 return per_cpu(cpu_llc_shared_map, cpu);
156 }
157
cpu_l2c_shared_mask(int cpu)158 static inline struct cpumask *cpu_l2c_shared_mask(int cpu)
159 {
160 return per_cpu(cpu_l2c_shared_map, cpu);
161 }
162
163 #else /* !CONFIG_SMP */
164 #define wbinvd_on_cpu(cpu) wbinvd()
wbinvd_on_all_cpus(void)165 static inline int wbinvd_on_all_cpus(void)
166 {
167 wbinvd();
168 return 0;
169 }
170
cpu_llc_shared_mask(int cpu)171 static inline struct cpumask *cpu_llc_shared_mask(int cpu)
172 {
173 return (struct cpumask *)cpumask_of(0);
174 }
175 #endif /* CONFIG_SMP */
176
177 extern unsigned disabled_cpus;
178
179 #ifdef CONFIG_DEBUG_NMI_SELFTEST
180 extern void nmi_selftest(void);
181 #else
182 #define nmi_selftest() do { } while (0)
183 #endif
184
185 extern unsigned int smpboot_control;
186 extern unsigned long apic_mmio_base;
187
188 #endif /* !__ASSEMBLY__ */
189
190 /* Control bits for startup_64 */
191 #define STARTUP_READ_APICID 0x80000000
192
193 /* Top 8 bits are reserved for control */
194 #define STARTUP_PARALLEL_MASK 0xFF000000
195
196 #endif /* _ASM_X86_SMP_H */
197