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Linux kernel mirror (for testing)
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kernel
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linux
1#ifndef _ASM_X86_SMP_H
2#define _ASM_X86_SMP_H
3#ifndef __ASSEMBLY__
4#include <linux/cpumask.h>
5#include <linux/init.h>
6#include <asm/percpu.h>
7
8/*
9 * We need the APIC definitions automatically as part of 'smp.h'
10 */
11#ifdef CONFIG_X86_LOCAL_APIC
12# include <asm/mpspec.h>
13# include <asm/apic.h>
14# ifdef CONFIG_X86_IO_APIC
15# include <asm/io_apic.h>
16# endif
17#endif
18#include <asm/thread_info.h>
19#include <asm/cpumask.h>
20
21extern int smp_num_siblings;
22extern unsigned int num_processors;
23
24DECLARE_PER_CPU(cpumask_var_t, cpu_sibling_map);
25DECLARE_PER_CPU(cpumask_var_t, cpu_core_map);
26DECLARE_PER_CPU(u16, cpu_llc_id);
27DECLARE_PER_CPU(int, cpu_number);
28
29static inline struct cpumask *cpu_sibling_mask(int cpu)
30{
31 return per_cpu(cpu_sibling_map, cpu);
32}
33
34static inline struct cpumask *cpu_core_mask(int cpu)
35{
36 return per_cpu(cpu_core_map, cpu);
37}
38
39DECLARE_EARLY_PER_CPU(u16, x86_cpu_to_apicid);
40DECLARE_EARLY_PER_CPU(u16, x86_bios_cpu_apicid);
41
42/* Static state in head.S used to set up a CPU */
43extern unsigned long stack_start; /* Initial stack pointer address */
44
45struct smp_ops {
46 void (*smp_prepare_boot_cpu)(void);
47 void (*smp_prepare_cpus)(unsigned max_cpus);
48 void (*smp_cpus_done)(unsigned max_cpus);
49
50 void (*stop_other_cpus)(int wait);
51 void (*smp_send_reschedule)(int cpu);
52
53 int (*cpu_up)(unsigned cpu);
54 int (*cpu_disable)(void);
55 void (*cpu_die)(unsigned int cpu);
56 void (*play_dead)(void);
57
58 void (*send_call_func_ipi)(const struct cpumask *mask);
59 void (*send_call_func_single_ipi)(int cpu);
60};
61
62/* Globals due to paravirt */
63extern void set_cpu_sibling_map(int cpu);
64
65#ifdef CONFIG_SMP
66#ifndef CONFIG_PARAVIRT
67#define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0)
68#endif
69extern struct smp_ops smp_ops;
70
71static inline void smp_send_stop(void)
72{
73 smp_ops.stop_other_cpus(0);
74}
75
76static inline void stop_other_cpus(void)
77{
78 smp_ops.stop_other_cpus(1);
79}
80
81static inline void smp_prepare_boot_cpu(void)
82{
83 smp_ops.smp_prepare_boot_cpu();
84}
85
86static inline void smp_prepare_cpus(unsigned int max_cpus)
87{
88 smp_ops.smp_prepare_cpus(max_cpus);
89}
90
91static inline void smp_cpus_done(unsigned int max_cpus)
92{
93 smp_ops.smp_cpus_done(max_cpus);
94}
95
96static inline int __cpu_up(unsigned int cpu)
97{
98 return smp_ops.cpu_up(cpu);
99}
100
101static inline int __cpu_disable(void)
102{
103 return smp_ops.cpu_disable();
104}
105
106static inline void __cpu_die(unsigned int cpu)
107{
108 smp_ops.cpu_die(cpu);
109}
110
111static inline void play_dead(void)
112{
113 smp_ops.play_dead();
114}
115
116static inline void smp_send_reschedule(int cpu)
117{
118 smp_ops.smp_send_reschedule(cpu);
119}
120
121static inline void arch_send_call_function_single_ipi(int cpu)
122{
123 smp_ops.send_call_func_single_ipi(cpu);
124}
125
126static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
127{
128 smp_ops.send_call_func_ipi(mask);
129}
130
131void cpu_disable_common(void);
132void native_smp_prepare_boot_cpu(void);
133void native_smp_prepare_cpus(unsigned int max_cpus);
134void native_smp_cpus_done(unsigned int max_cpus);
135int native_cpu_up(unsigned int cpunum);
136int native_cpu_disable(void);
137void native_cpu_die(unsigned int cpu);
138void native_play_dead(void);
139void play_dead_common(void);
140void wbinvd_on_cpu(int cpu);
141int wbinvd_on_all_cpus(void);
142
143void native_send_call_func_ipi(const struct cpumask *mask);
144void native_send_call_func_single_ipi(int cpu);
145
146void smp_store_cpu_info(int id);
147#define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
148
149/* We don't mark CPUs online until __cpu_up(), so we need another measure */
150static inline int num_booting_cpus(void)
151{
152 return cpumask_weight(cpu_callout_mask);
153}
154#else /* !CONFIG_SMP */
155#define wbinvd_on_cpu(cpu) wbinvd()
156static inline int wbinvd_on_all_cpus(void)
157{
158 wbinvd();
159 return 0;
160}
161#endif /* CONFIG_SMP */
162
163extern unsigned disabled_cpus __cpuinitdata;
164
165#ifdef CONFIG_X86_32_SMP
166/*
167 * This function is needed by all SMP systems. It must _always_ be valid
168 * from the initial startup. We map APIC_BASE very early in page_setup(),
169 * so this is correct in the x86 case.
170 */
171#define raw_smp_processor_id() (percpu_read(cpu_number))
172extern int safe_smp_processor_id(void);
173
174#elif defined(CONFIG_X86_64_SMP)
175#define raw_smp_processor_id() (percpu_read(cpu_number))
176
177#define stack_smp_processor_id() \
178({ \
179 struct thread_info *ti; \
180 __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \
181 ti->cpu; \
182})
183#define safe_smp_processor_id() smp_processor_id()
184
185#endif
186
187#ifdef CONFIG_X86_LOCAL_APIC
188
189#ifndef CONFIG_X86_64
190static inline int logical_smp_processor_id(void)
191{
192 /* we don't want to mark this access volatile - bad code generation */
193 return GET_APIC_LOGICAL_ID(apic_read(APIC_LDR));
194}
195
196#endif
197
198extern int hard_smp_processor_id(void);
199
200#else /* CONFIG_X86_LOCAL_APIC */
201
202# ifndef CONFIG_SMP
203# define hard_smp_processor_id() 0
204# endif
205
206#endif /* CONFIG_X86_LOCAL_APIC */
207
208#endif /* __ASSEMBLY__ */
209#endif /* _ASM_X86_SMP_H */