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 DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_llc_id);
21 DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_l2c_id);
22
23 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid);
24 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid);
25
26 struct task_struct;
27
28 struct smp_ops {
29 void (*smp_prepare_boot_cpu)(void);
30 void (*smp_prepare_cpus)(unsigned max_cpus);
31 void (*smp_cpus_done)(unsigned max_cpus);
32
33 void (*stop_other_cpus)(int wait);
34 void (*crash_stop_other_cpus)(void);
35 void (*smp_send_reschedule)(int cpu);
36
37 void (*cleanup_dead_cpu)(unsigned cpu);
38 void (*poll_sync_state)(void);
39 int (*kick_ap_alive)(unsigned cpu, struct task_struct *tidle);
40 int (*cpu_disable)(void);
41 void (*cpu_die)(unsigned int cpu);
42 void (*play_dead)(void);
43
44 void (*send_call_func_ipi)(const struct cpumask *mask);
45 void (*send_call_func_single_ipi)(int cpu);
46 };
47
48 /* Globals due to paravirt */
49 extern void set_cpu_sibling_map(int cpu);
50
51 #ifdef CONFIG_SMP
52 extern struct smp_ops smp_ops;
53
smp_send_stop(void)54 static inline void smp_send_stop(void)
55 {
56 smp_ops.stop_other_cpus(0);
57 }
58
stop_other_cpus(void)59 static inline void stop_other_cpus(void)
60 {
61 smp_ops.stop_other_cpus(1);
62 }
63
smp_prepare_boot_cpu(void)64 static inline void smp_prepare_boot_cpu(void)
65 {
66 smp_ops.smp_prepare_boot_cpu();
67 }
68
smp_prepare_cpus(unsigned int max_cpus)69 static inline void smp_prepare_cpus(unsigned int max_cpus)
70 {
71 smp_ops.smp_prepare_cpus(max_cpus);
72 }
73
smp_cpus_done(unsigned int max_cpus)74 static inline void smp_cpus_done(unsigned int max_cpus)
75 {
76 smp_ops.smp_cpus_done(max_cpus);
77 }
78
__cpu_disable(void)79 static inline int __cpu_disable(void)
80 {
81 return smp_ops.cpu_disable();
82 }
83
__cpu_die(unsigned int cpu)84 static inline void __cpu_die(unsigned int cpu)
85 {
86 if (smp_ops.cpu_die)
87 smp_ops.cpu_die(cpu);
88 }
89
play_dead(void)90 static inline void __noreturn play_dead(void)
91 {
92 smp_ops.play_dead();
93 BUG();
94 }
95
arch_smp_send_reschedule(int cpu)96 static inline void arch_smp_send_reschedule(int cpu)
97 {
98 smp_ops.smp_send_reschedule(cpu);
99 }
100
arch_send_call_function_single_ipi(int cpu)101 static inline void arch_send_call_function_single_ipi(int cpu)
102 {
103 smp_ops.send_call_func_single_ipi(cpu);
104 }
105
arch_send_call_function_ipi_mask(const struct cpumask * mask)106 static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
107 {
108 smp_ops.send_call_func_ipi(mask);
109 }
110
111 void cpu_disable_common(void);
112 void native_smp_prepare_boot_cpu(void);
113 void smp_prepare_cpus_common(void);
114 void native_smp_prepare_cpus(unsigned int max_cpus);
115 void calculate_max_logical_packages(void);
116 void native_smp_cpus_done(unsigned int max_cpus);
117 int common_cpu_up(unsigned int cpunum, struct task_struct *tidle);
118 int native_kick_ap(unsigned int cpu, struct task_struct *tidle);
119 int native_cpu_disable(void);
120 void __noreturn hlt_play_dead(void);
121 void native_play_dead(void);
122 void play_dead_common(void);
123 void wbinvd_on_cpu(int cpu);
124 int wbinvd_on_all_cpus(void);
125
126 void smp_kick_mwait_play_dead(void);
127
128 void native_smp_send_reschedule(int cpu);
129 void native_send_call_func_ipi(const struct cpumask *mask);
130 void native_send_call_func_single_ipi(int cpu);
131
132 void smp_store_cpu_info(int id);
133
134 asmlinkage __visible void smp_reboot_interrupt(void);
135 __visible void smp_reschedule_interrupt(struct pt_regs *regs);
136 __visible void smp_call_function_interrupt(struct pt_regs *regs);
137 __visible void smp_call_function_single_interrupt(struct pt_regs *r);
138
139 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
140 #define cpu_acpi_id(cpu) per_cpu(x86_cpu_to_acpiid, cpu)
141
142 /*
143 * This function is needed by all SMP systems. It must _always_ be valid
144 * from the initial startup.
145 */
146 #define raw_smp_processor_id() this_cpu_read(pcpu_hot.cpu_number)
147 #define __smp_processor_id() __this_cpu_read(pcpu_hot.cpu_number)
148
149 #ifdef CONFIG_X86_32
150 extern int safe_smp_processor_id(void);
151 #else
152 # define safe_smp_processor_id() smp_processor_id()
153 #endif
154
cpu_llc_shared_mask(int cpu)155 static inline struct cpumask *cpu_llc_shared_mask(int cpu)
156 {
157 return per_cpu(cpu_llc_shared_map, cpu);
158 }
159
cpu_l2c_shared_mask(int cpu)160 static inline struct cpumask *cpu_l2c_shared_mask(int cpu)
161 {
162 return per_cpu(cpu_l2c_shared_map, cpu);
163 }
164
165 #else /* !CONFIG_SMP */
166 #define wbinvd_on_cpu(cpu) wbinvd()
wbinvd_on_all_cpus(void)167 static inline int wbinvd_on_all_cpus(void)
168 {
169 wbinvd();
170 return 0;
171 }
172
cpu_llc_shared_mask(int cpu)173 static inline struct cpumask *cpu_llc_shared_mask(int cpu)
174 {
175 return (struct cpumask *)cpumask_of(0);
176 }
177 #endif /* CONFIG_SMP */
178
179 extern unsigned disabled_cpus;
180
181 #ifdef CONFIG_DEBUG_NMI_SELFTEST
182 extern void nmi_selftest(void);
183 #else
184 #define nmi_selftest() do { } while (0)
185 #endif
186
187 extern unsigned int smpboot_control;
188 extern unsigned long apic_mmio_base;
189
190 #endif /* !__ASSEMBLY__ */
191
192 /* Control bits for startup_64 */
193 #define STARTUP_READ_APICID 0x80000000
194
195 /* Top 8 bits are reserved for control */
196 #define STARTUP_PARALLEL_MASK 0xFF000000
197
198 #endif /* _ASM_X86_SMP_H */
199