Line data    Source code

       1             : /* SPDX-License-Identifier: GPL-2.0 */
       2             : #ifndef _ASM_X86_SMP_H
       3             : #define _ASM_X86_SMP_H
       4             : #ifndef __ASSEMBLY__
       5             : #include <linux/cpumask.h>
       6             : #include <asm/percpu.h>
       7             : 
       8             : #include <asm/thread_info.h>
       9             : #include <asm/cpumask.h>
      10             : 
      11             : extern int smp_num_siblings;
      12             : extern unsigned int num_processors;
      13             : 
      14             : DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_sibling_map);
      15             : DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_map);
      16             : DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_die_map);
      17             : /* cpus sharing the last level cache: */
      18             : DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map);
      19             : DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_llc_id);
      20             : DECLARE_PER_CPU_READ_MOSTLY(int, cpu_number);
      21             : 
      22          60 : static inline struct cpumask *cpu_llc_shared_mask(int cpu)
      23             : {
      24           4 :         return per_cpu(cpu_llc_shared_map, cpu);
      25             : }
      26             : 
      27             : DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid);
      28             : DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid);
      29             : DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid);
      30             : #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
      31             : DECLARE_EARLY_PER_CPU_READ_MOSTLY(int, x86_cpu_to_logical_apicid);
      32             : #endif
      33             : 
      34             : struct task_struct;
      35             : 
      36             : struct smp_ops {
      37             :         void (*smp_prepare_boot_cpu)(void);
      38             :         void (*smp_prepare_cpus)(unsigned max_cpus);
      39             :         void (*smp_cpus_done)(unsigned max_cpus);
      40             : 
      41             :         void (*stop_other_cpus)(int wait);
      42             :         void (*crash_stop_other_cpus)(void);
      43             :         void (*smp_send_reschedule)(int cpu);
      44             : 
      45             :         int (*cpu_up)(unsigned cpu, struct task_struct *tidle);
      46             :         int (*cpu_disable)(void);
      47             :         void (*cpu_die)(unsigned int cpu);
      48             :         void (*play_dead)(void);
      49             : 
      50             :         void (*send_call_func_ipi)(const struct cpumask *mask);
      51             :         void (*send_call_func_single_ipi)(int cpu);
      52             : };
      53             : 
      54             : /* Globals due to paravirt */
      55             : extern void set_cpu_sibling_map(int cpu);
      56             : 
      57             : #ifdef CONFIG_SMP
      58             : extern struct smp_ops smp_ops;
      59             : 
      60           0 : static inline void smp_send_stop(void)
      61             : {
      62           0 :         smp_ops.stop_other_cpus(0);
      63           0 : }
      64             : 
      65           0 : static inline void stop_other_cpus(void)
      66             : {
      67           0 :         smp_ops.stop_other_cpus(1);
      68             : }
      69             : 
      70           1 : static inline void smp_prepare_boot_cpu(void)
      71             : {
      72           1 :         smp_ops.smp_prepare_boot_cpu();
      73           1 : }
      74             : 
      75           1 : static inline void smp_prepare_cpus(unsigned int max_cpus)
      76             : {
      77           1 :         smp_ops.smp_prepare_cpus(max_cpus);
      78             : }
      79             : 
      80           1 : static inline void smp_cpus_done(unsigned int max_cpus)
      81             : {
      82           1 :         smp_ops.smp_cpus_done(max_cpus);
      83             : }
      84             : 
      85           3 : static inline int __cpu_up(unsigned int cpu, struct task_struct *tidle)
      86             : {
      87           3 :         return smp_ops.cpu_up(cpu, tidle);
      88             : }
      89             : 
      90           0 : static inline int __cpu_disable(void)
      91             : {
      92           0 :         return smp_ops.cpu_disable();
      93             : }
      94             : 
      95           0 : static inline void __cpu_die(unsigned int cpu)
      96             : {
      97           0 :         smp_ops.cpu_die(cpu);
      98             : }
      99             : 
     100           0 : static inline void play_dead(void)
     101             : {
     102           0 :         smp_ops.play_dead();
     103             : }
     104             : 
     105         786 : static inline void smp_send_reschedule(int cpu)
     106             : {
     107         786 :         smp_ops.smp_send_reschedule(cpu);
     108         786 : }
     109             : 
     110        7075 : static inline void arch_send_call_function_single_ipi(int cpu)
     111             : {
     112        7075 :         smp_ops.send_call_func_single_ipi(cpu);
     113        7075 : }
     114             : 
     115          40 : static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
     116             : {
     117          40 :         smp_ops.send_call_func_ipi(mask);
     118             : }
     119             : 
     120             : void cpu_disable_common(void);
     121             : void native_smp_prepare_boot_cpu(void);
     122             : void native_smp_prepare_cpus(unsigned int max_cpus);
     123             : void calculate_max_logical_packages(void);
     124             : void native_smp_cpus_done(unsigned int max_cpus);
     125             : int common_cpu_up(unsigned int cpunum, struct task_struct *tidle);
     126             : int native_cpu_up(unsigned int cpunum, struct task_struct *tidle);
     127             : int native_cpu_disable(void);
     128             : int common_cpu_die(unsigned int cpu);
     129             : void native_cpu_die(unsigned int cpu);
     130             : void hlt_play_dead(void);
     131             : void native_play_dead(void);
     132             : void play_dead_common(void);
     133             : void wbinvd_on_cpu(int cpu);
     134             : int wbinvd_on_all_cpus(void);
     135             : 
     136             : void native_smp_send_reschedule(int cpu);
     137             : void native_send_call_func_ipi(const struct cpumask *mask);
     138             : void native_send_call_func_single_ipi(int cpu);
     139             : void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle);
     140             : 
     141             : void smp_store_boot_cpu_info(void);
     142             : void smp_store_cpu_info(int id);
     143             : 
     144             : asmlinkage __visible void smp_reboot_interrupt(void);
     145             : __visible void smp_reschedule_interrupt(struct pt_regs *regs);
     146             : __visible void smp_call_function_interrupt(struct pt_regs *regs);
     147             : __visible void smp_call_function_single_interrupt(struct pt_regs *r);
     148             : 
     149             : #define cpu_physical_id(cpu)    per_cpu(x86_cpu_to_apicid, cpu)
     150             : #define cpu_acpi_id(cpu)        per_cpu(x86_cpu_to_acpiid, cpu)
     151             : 
     152             : /*
     153             :  * This function is needed by all SMP systems. It must _always_ be valid
     154             :  * from the initial startup. We map APIC_BASE very early in page_setup(),
     155             :  * so this is correct in the x86 case.
     156             :  */
     157             : #define raw_smp_processor_id()  this_cpu_read(cpu_number)
     158             : #define __smp_processor_id() __this_cpu_read(cpu_number)
     159             : 
     160             : #ifdef CONFIG_X86_32
     161             : extern int safe_smp_processor_id(void);
     162             : #else
     163             : # define safe_smp_processor_id()        smp_processor_id()
     164             : #endif
     165             : 
     166             : #else /* !CONFIG_SMP */
     167             : #define wbinvd_on_cpu(cpu)     wbinvd()
     168             : static inline int wbinvd_on_all_cpus(void)
     169             : {
     170             :         wbinvd();
     171             :         return 0;
     172             : }
     173             : #endif /* CONFIG_SMP */
     174             : 
     175             : extern unsigned disabled_cpus;
     176             : 
     177             : #ifdef CONFIG_X86_LOCAL_APIC
     178             : extern int hard_smp_processor_id(void);
     179             : 
     180             : #else /* CONFIG_X86_LOCAL_APIC */
     181             : #define hard_smp_processor_id() 0
     182             : #endif /* CONFIG_X86_LOCAL_APIC */
     183             : 
     184             : #ifdef CONFIG_DEBUG_NMI_SELFTEST
     185             : extern void nmi_selftest(void);
     186             : #else
     187             : #define nmi_selftest() do { } while (0)
     188             : #endif
     189             : 
     190             : #endif /* __ASSEMBLY__ */
     191             : #endif /* _ASM_X86_SMP_H */