1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_X86_SMP_H
3 #define _ASM_X86_SMP_H
4 #ifndef __ASSEMBLER__
5 #include <linux/cpumask.h>
6 #include <linux/thread_info.h>
7
8 #include <asm/cpumask.h>
9
10 DECLARE_PER_CPU_CACHE_HOT(int, cpu_number);
11
12 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_sibling_map);
13 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_map);
14 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_die_map);
15 /* cpus sharing the last level cache: */
16 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map);
17 DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_l2c_shared_map);
18
19 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_apicid);
20 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid);
21
22 struct task_struct;
23
24 struct smp_ops {
25 void (*smp_prepare_boot_cpu)(void);
26 void (*smp_prepare_cpus)(unsigned max_cpus);
27 void (*smp_cpus_done)(unsigned max_cpus);
28
29 void (*stop_other_cpus)(int wait);
30 void (*crash_stop_other_cpus)(void);
31 void (*smp_send_reschedule)(int cpu);
32
33 void (*cleanup_dead_cpu)(unsigned cpu);
34 void (*poll_sync_state)(void);
35 int (*kick_ap_alive)(unsigned cpu, struct task_struct *tidle);
36 int (*cpu_disable)(void);
37 void (*cpu_die)(unsigned int cpu);
38 void (*play_dead)(void);
39 void (*stop_this_cpu)(void);
40
41 void (*send_call_func_ipi)(const struct cpumask *mask);
42 void (*send_call_func_single_ipi)(int cpu);
43 };
44
45 /* Globals due to paravirt */
46 extern void set_cpu_sibling_map(int cpu);
47
48 #ifdef CONFIG_SMP
49 extern struct smp_ops smp_ops;
50
smp_send_stop(void)51 static inline void smp_send_stop(void)
52 {
53 smp_ops.stop_other_cpus(0);
54 }
55
stop_other_cpus(void)56 static inline void stop_other_cpus(void)
57 {
58 smp_ops.stop_other_cpus(1);
59 }
60
smp_prepare_cpus(unsigned int max_cpus)61 static inline void smp_prepare_cpus(unsigned int max_cpus)
62 {
63 smp_ops.smp_prepare_cpus(max_cpus);
64 }
65
smp_cpus_done(unsigned int max_cpus)66 static inline void smp_cpus_done(unsigned int max_cpus)
67 {
68 smp_ops.smp_cpus_done(max_cpus);
69 }
70
__cpu_disable(void)71 static inline int __cpu_disable(void)
72 {
73 return smp_ops.cpu_disable();
74 }
75
__cpu_die(unsigned int cpu)76 static inline void __cpu_die(unsigned int cpu)
77 {
78 if (smp_ops.cpu_die)
79 smp_ops.cpu_die(cpu);
80 }
81
play_dead(void)82 static inline void __noreturn play_dead(void)
83 {
84 smp_ops.play_dead();
85 BUG();
86 }
87
arch_smp_send_reschedule(int cpu)88 static inline void arch_smp_send_reschedule(int cpu)
89 {
90 smp_ops.smp_send_reschedule(cpu);
91 }
92
arch_send_call_function_single_ipi(int cpu)93 static inline void arch_send_call_function_single_ipi(int cpu)
94 {
95 smp_ops.send_call_func_single_ipi(cpu);
96 }
97
arch_send_call_function_ipi_mask(const struct cpumask * mask)98 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
99 {
100 smp_ops.send_call_func_ipi(mask);
101 }
102
103 void cpu_disable_common(void);
104 void native_smp_prepare_boot_cpu(void);
105 void smp_prepare_cpus_common(void);
106 void native_smp_prepare_cpus(unsigned int max_cpus);
107 void native_smp_cpus_done(unsigned int max_cpus);
108 int common_cpu_up(unsigned int cpunum, struct task_struct *tidle);
109 int native_kick_ap(unsigned int cpu, struct task_struct *tidle);
110 int native_cpu_disable(void);
111 void __noreturn hlt_play_dead(void);
112 void native_play_dead(void);
113 void play_dead_common(void);
114 void wbinvd_on_cpu(int cpu);
115 int wbinvd_on_all_cpus(void);
116
117 void smp_kick_mwait_play_dead(void);
118 void __noreturn mwait_play_dead(unsigned int eax_hint);
119
120 void native_smp_send_reschedule(int cpu);
121 void native_send_call_func_ipi(const struct cpumask *mask);
122 void native_send_call_func_single_ipi(int cpu);
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(cpu_number)
137 #define __smp_processor_id() __this_cpu_read(cpu_number)
138
cpu_llc_shared_mask(int cpu)139 static inline struct cpumask *cpu_llc_shared_mask(int cpu)
140 {
141 return per_cpu(cpu_llc_shared_map, cpu);
142 }
143
cpu_l2c_shared_mask(int cpu)144 static inline struct cpumask *cpu_l2c_shared_mask(int cpu)
145 {
146 return per_cpu(cpu_l2c_shared_map, cpu);
147 }
148
149 #else /* !CONFIG_SMP */
150 #define wbinvd_on_cpu(cpu) wbinvd()
wbinvd_on_all_cpus(void)151 static inline int wbinvd_on_all_cpus(void)
152 {
153 wbinvd();
154 return 0;
155 }
156
cpu_llc_shared_mask(int cpu)157 static inline struct cpumask *cpu_llc_shared_mask(int cpu)
158 {
159 return (struct cpumask *)cpumask_of(0);
160 }
161
mwait_play_dead(unsigned int eax_hint)162 static inline void __noreturn mwait_play_dead(unsigned int eax_hint) { BUG(); }
163 #endif /* CONFIG_SMP */
164
165 #ifdef CONFIG_DEBUG_NMI_SELFTEST
166 extern void nmi_selftest(void);
167 #else
168 #define nmi_selftest() do { } while (0)
169 #endif
170
171 extern unsigned int smpboot_control;
172 extern unsigned long apic_mmio_base;
173
174 #endif /* !__ASSEMBLER__ */
175
176 /* Control bits for startup_64 */
177 #define STARTUP_READ_APICID 0x80000000
178
179 /* Top 8 bits are reserved for control */
180 #define STARTUP_PARALLEL_MASK 0xFF000000
181
182 #endif /* _ASM_X86_SMP_H */
183