4 #include <linux/cpumask.h>
5 #include <linux/init.h>
6 #include <asm/percpu.h>
9 * We need the APIC definitions automatically as part of 'smp.h'
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>
18 #include <asm/thread_info.h>
19 #include <asm/cpumask.h>
20 #include <asm/cpufeature.h>
22 extern int smp_num_siblings
;
23 extern unsigned int num_processors
;
25 static inline bool cpu_has_ht_siblings(void)
27 bool has_siblings
= false;
29 has_siblings
= cpu_has_ht
&& smp_num_siblings
> 1;
34 DECLARE_PER_CPU(cpumask_var_t
, cpu_sibling_map
);
35 DECLARE_PER_CPU(cpumask_var_t
, cpu_core_map
);
36 /* cpus sharing the last level cache: */
37 DECLARE_PER_CPU(cpumask_var_t
, cpu_llc_shared_map
);
38 DECLARE_PER_CPU(u16
, cpu_llc_id
);
39 DECLARE_PER_CPU(int, cpu_number
);
41 static inline struct cpumask
*cpu_sibling_mask(int cpu
)
43 return per_cpu(cpu_sibling_map
, cpu
);
46 static inline struct cpumask
*cpu_core_mask(int cpu
)
48 return per_cpu(cpu_core_map
, cpu
);
51 static inline struct cpumask
*cpu_llc_shared_mask(int cpu
)
53 return per_cpu(cpu_llc_shared_map
, cpu
);
56 DECLARE_EARLY_PER_CPU(u16
, x86_cpu_to_apicid
);
57 DECLARE_EARLY_PER_CPU(u16
, x86_bios_cpu_apicid
);
59 /* Static state in head.S used to set up a CPU */
60 extern unsigned long stack_start
; /* Initial stack pointer address */
63 void (*smp_prepare_boot_cpu
)(void);
64 void (*smp_prepare_cpus
)(unsigned max_cpus
);
65 void (*smp_cpus_done
)(unsigned max_cpus
);
67 void (*stop_other_cpus
)(int wait
);
68 void (*smp_send_reschedule
)(int cpu
);
70 int (*cpu_up
)(unsigned cpu
);
71 int (*cpu_disable
)(void);
72 void (*cpu_die
)(unsigned int cpu
);
73 void (*play_dead
)(void);
75 void (*send_call_func_ipi
)(const struct cpumask
*mask
);
76 void (*send_call_func_single_ipi
)(int cpu
);
79 /* Globals due to paravirt */
80 extern void set_cpu_sibling_map(int cpu
);
83 #ifndef CONFIG_PARAVIRT
84 #define startup_ipi_hook(phys_apicid, start_eip, start_esp) do { } while (0)
86 extern struct smp_ops smp_ops
;
88 static inline void smp_send_stop(void)
90 smp_ops
.stop_other_cpus(0);
93 static inline void stop_other_cpus(void)
95 smp_ops
.stop_other_cpus(1);
98 static inline void smp_prepare_boot_cpu(void)
100 smp_ops
.smp_prepare_boot_cpu();
103 static inline void smp_prepare_cpus(unsigned int max_cpus
)
105 smp_ops
.smp_prepare_cpus(max_cpus
);
108 static inline void smp_cpus_done(unsigned int max_cpus
)
110 smp_ops
.smp_cpus_done(max_cpus
);
113 static inline int __cpu_up(unsigned int cpu
)
115 return smp_ops
.cpu_up(cpu
);
118 static inline int __cpu_disable(void)
120 return smp_ops
.cpu_disable();
123 static inline void __cpu_die(unsigned int cpu
)
125 smp_ops
.cpu_die(cpu
);
128 static inline void play_dead(void)
133 static inline void smp_send_reschedule(int cpu
)
135 smp_ops
.smp_send_reschedule(cpu
);
138 static inline void arch_send_call_function_single_ipi(int cpu
)
140 smp_ops
.send_call_func_single_ipi(cpu
);
143 static inline void arch_send_call_function_ipi_mask(const struct cpumask
*mask
)
145 smp_ops
.send_call_func_ipi(mask
);
148 void cpu_disable_common(void);
149 void native_smp_prepare_boot_cpu(void);
150 void native_smp_prepare_cpus(unsigned int max_cpus
);
151 void native_smp_cpus_done(unsigned int max_cpus
);
152 int native_cpu_up(unsigned int cpunum
);
153 int native_cpu_disable(void);
154 void native_cpu_die(unsigned int cpu
);
155 void native_play_dead(void);
156 void play_dead_common(void);
157 void wbinvd_on_cpu(int cpu
);
158 int wbinvd_on_all_cpus(void);
160 void native_send_call_func_ipi(const struct cpumask
*mask
);
161 void native_send_call_func_single_ipi(int cpu
);
163 void smp_store_cpu_info(int id
);
164 #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu)
166 /* We don't mark CPUs online until __cpu_up(), so we need another measure */
167 static inline int num_booting_cpus(void)
169 return cpumask_weight(cpu_callout_mask
);
171 #else /* !CONFIG_SMP */
172 #define wbinvd_on_cpu(cpu) wbinvd()
173 static inline int wbinvd_on_all_cpus(void)
178 #endif /* CONFIG_SMP */
180 extern unsigned disabled_cpus __cpuinitdata
;
182 #ifdef CONFIG_X86_32_SMP
184 * This function is needed by all SMP systems. It must _always_ be valid
185 * from the initial startup. We map APIC_BASE very early in page_setup(),
186 * so this is correct in the x86 case.
188 #define raw_smp_processor_id() (percpu_read(cpu_number))
189 extern int safe_smp_processor_id(void);
191 #elif defined(CONFIG_X86_64_SMP)
192 #define raw_smp_processor_id() (percpu_read(cpu_number))
194 #define stack_smp_processor_id() \
196 struct thread_info *ti; \
197 __asm__("andq %%rsp,%0; ":"=r" (ti) : "0" (CURRENT_MASK)); \
200 #define safe_smp_processor_id() smp_processor_id()
204 #ifdef CONFIG_X86_LOCAL_APIC
206 #ifndef CONFIG_X86_64
207 static inline int logical_smp_processor_id(void)
209 /* we don't want to mark this access volatile - bad code generation */
210 return GET_APIC_LOGICAL_ID(apic_read(APIC_LDR
));
215 extern int hard_smp_processor_id(void);
217 #else /* CONFIG_X86_LOCAL_APIC */
220 # define hard_smp_processor_id() 0
223 #endif /* CONFIG_X86_LOCAL_APIC */
225 #endif /* __ASSEMBLY__ */
226 #endif /* _ASM_X86_SMP_H */