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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 <asm/percpu.h>
6
7/*
8 * We need the APIC definitions automatically as part of 'smp.h'
9 */
10#ifdef CONFIG_X86_LOCAL_APIC
11# include <asm/mpspec.h>
12# include <asm/apic.h>
13# ifdef CONFIG_X86_IO_APIC
14# include <asm/io_apic.h>
15# endif
16#endif
17#include <asm/thread_info.h>
18#include <asm/cpumask.h>
19#include <asm/cpufeature.h>
20
21extern int smp_num_siblings;
22extern unsigned int num_processors;
23
24static inline bool cpu_has_ht_siblings(void)
25{
26 bool has_siblings = false;
27#ifdef CONFIG_SMP
28 has_siblings = cpu_has_ht && smp_num_siblings > 1;
29#endif
30 return has_siblings;
31}
32
33DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_sibling_map);
34DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_map);
35/* cpus sharing the last level cache: */
36DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map);
37DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_llc_id);
38DECLARE_PER_CPU_READ_MOSTLY(int, cpu_number);
39
40static inline struct cpumask *cpu_sibling_mask(int cpu)
41{
42 return per_cpu(cpu_sibling_map, cpu);
43}
44
45static inline struct cpumask *cpu_core_mask(int cpu)
46{
47 return per_cpu(cpu_core_map, cpu);
48}
49
50static inline struct cpumask *cpu_llc_shared_mask(int cpu)
51{
52 return per_cpu(cpu_llc_shared_map, cpu);
53}
54
55DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid);
56DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid);
57#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
58DECLARE_EARLY_PER_CPU_READ_MOSTLY(int, x86_cpu_to_logical_apicid);
59#endif
60
61/* Static state in head.S used to set up a CPU */
62extern unsigned long stack_start; /* Initial stack pointer address */
63
64struct task_struct;
65
66struct smp_ops {
67 void (*smp_prepare_boot_cpu)(void);
68 void (*smp_prepare_cpus)(unsigned max_cpus);
69 void (*smp_cpus_done)(unsigned max_cpus);
70
71 void (*stop_other_cpus)(int wait);
72 void (*smp_send_reschedule)(int cpu);
73
74 int (*cpu_up)(unsigned cpu, struct task_struct *tidle);
75 int (*cpu_disable)(void);
76 void (*cpu_die)(unsigned int cpu);
77 void (*play_dead)(void);
78
79 void (*send_call_func_ipi)(const struct cpumask *mask);
80 void (*send_call_func_single_ipi)(int cpu);
81};
82
83/* Globals due to paravirt */
84extern void set_cpu_sibling_map(int cpu);
85
86#ifdef CONFIG_SMP
87#ifndef CONFIG_PARAVIRT
88#define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0)
89#endif
90extern struct smp_ops smp_ops;
91
92static inline void smp_send_stop(void)
93{
94 smp_ops.stop_other_cpus(0);
95}
96
97static inline void stop_other_cpus(void)
98{
99 smp_ops.stop_other_cpus(1);
100}
101
102static inline void smp_prepare_boot_cpu(void)
103{
104 smp_ops.smp_prepare_boot_cpu();
105}
106
107static inline void smp_prepare_cpus(unsigned int max_cpus)
108{
109 smp_ops.smp_prepare_cpus(max_cpus);
110}
111
112static inline void smp_cpus_done(unsigned int max_cpus)
113{
114 smp_ops.smp_cpus_done(max_cpus);
115}
116
117static inline int __cpu_up(unsigned int cpu, struct task_struct *tidle)
118{
119 return smp_ops.cpu_up(cpu, tidle);
120}
121
122static inline int __cpu_disable(void)
123{
124 return smp_ops.cpu_disable();
125}
126
127static inline void __cpu_die(unsigned int cpu)
128{
129 smp_ops.cpu_die(cpu);
130}
131
132static inline void play_dead(void)
133{
134 smp_ops.play_dead();
135}
136
137static inline void smp_send_reschedule(int cpu)
138{
139 smp_ops.smp_send_reschedule(cpu);
140}
141
142static inline void arch_send_call_function_single_ipi(int cpu)
143{
144 smp_ops.send_call_func_single_ipi(cpu);
145}
146
147static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
148{
149 smp_ops.send_call_func_ipi(mask);
150}
151
152void cpu_disable_common(void);
153void native_smp_prepare_boot_cpu(void);
154void native_smp_prepare_cpus(unsigned int max_cpus);
155void native_smp_cpus_done(unsigned int max_cpus);
156int native_cpu_up(unsigned int cpunum, struct task_struct *tidle);
157int native_cpu_disable(void);
158void native_cpu_die(unsigned int cpu);
159void native_play_dead(void);
160void play_dead_common(void);
161void wbinvd_on_cpu(int cpu);
162int wbinvd_on_all_cpus(void);
163
164void native_send_call_func_ipi(const struct cpumask *mask);
165void native_send_call_func_single_ipi(int cpu);
166void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle);
167
168void smp_store_boot_cpu_info(void);
169void smp_store_cpu_info(int id);
170#define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
171
172#else /* !CONFIG_SMP */
173#define wbinvd_on_cpu(cpu) wbinvd()
174static inline int wbinvd_on_all_cpus(void)
175{
176 wbinvd();
177 return 0;
178}
179#endif /* CONFIG_SMP */
180
181extern unsigned disabled_cpus;
182
183#ifdef CONFIG_X86_32_SMP
184/*
185 * This function is needed by all SMP systems. It must _always_ be valid
186 * from the initial startup. We map APIC_BASE very early in page_setup(),
187 * so this is correct in the x86 case.
188 */
189#define raw_smp_processor_id() (this_cpu_read(cpu_number))
190extern int safe_smp_processor_id(void);
191
192#elif defined(CONFIG_X86_64_SMP)
193#define raw_smp_processor_id() (this_cpu_read(cpu_number))
194
195#define stack_smp_processor_id() \
196({ \
197 struct thread_info *ti; \
198 __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \
199 ti->cpu; \
200})
201#define safe_smp_processor_id() smp_processor_id()
202
203#endif
204
205#ifdef CONFIG_X86_LOCAL_APIC
206
207#ifndef CONFIG_X86_64
208static inline int logical_smp_processor_id(void)
209{
210 /* we don't want to mark this access volatile - bad code generation */
211 return GET_APIC_LOGICAL_ID(apic_read(APIC_LDR));
212}
213
214#endif
215
216extern int hard_smp_processor_id(void);
217
218#else /* CONFIG_X86_LOCAL_APIC */
219
220# ifndef CONFIG_SMP
221# define hard_smp_processor_id() 0
222# endif
223
224#endif /* CONFIG_X86_LOCAL_APIC */
225
226#ifdef CONFIG_DEBUG_NMI_SELFTEST
227extern void nmi_selftest(void);
228#else
229#define nmi_selftest() do { } while (0)
230#endif
231
232#endif /* __ASSEMBLY__ */
233#endif /* _ASM_X86_SMP_H */