LCOV - code coverage report
Current view: top level - arch/x86/include/asm - smp.h (source / functions) Hit Total Coverage
Test: coverage.info Lines: 1 1 100.0 %
Date: 2017-01-25 Functions: 0 0 -

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

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