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