LXR linux/arch/x86/include/asm/smp.h

   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
  11extern int smp_num_siblings;
  12extern unsigned int num_processors;
  13
  14DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_sibling_map);
  15DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_map);
  16DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_die_map);
  17/* cpus sharing the last level cache: */
  18DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map);
  19DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_llc_id);
  20DECLARE_PER_CPU_READ_MOSTLY(int, cpu_number);
  21
  22static inline struct cpumask *cpu_llc_shared_mask(int cpu)
  23{
  24        return per_cpu(cpu_llc_shared_map, cpu);
  25}
  26
  27DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid);
  28DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid);
  29DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid);
  30#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
  31DECLARE_EARLY_PER_CPU_READ_MOSTLY(int, x86_cpu_to_logical_apicid);
  32#endif
  33
  34struct task_struct;
  35
  36struct 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 */
  55extern void set_cpu_sibling_map(int cpu);
  56
  57#ifdef CONFIG_SMP
  58extern struct smp_ops smp_ops;
  59
  60static inline void smp_send_stop(void)
  61{
  62        smp_ops.stop_other_cpus(0);
  63}
  64
  65static inline void stop_other_cpus(void)
  66{
  67        smp_ops.stop_other_cpus(1);
  68}
  69
  70static inline void smp_prepare_boot_cpu(void)
  71{
  72        smp_ops.smp_prepare_boot_cpu();
  73}
  74
  75static inline void smp_prepare_cpus(unsigned int max_cpus)
  76{
  77        smp_ops.smp_prepare_cpus(max_cpus);
  78}
  79
  80static inline void smp_cpus_done(unsigned int max_cpus)
  81{
  82        smp_ops.smp_cpus_done(max_cpus);
  83}
  84
  85static inline int __cpu_up(unsigned int cpu, struct task_struct *tidle)
  86{
  87        return smp_ops.cpu_up(cpu, tidle);
  88}
  89
  90static inline int __cpu_disable(void)
  91{
  92        return smp_ops.cpu_disable();
  93}
  94
  95static inline void __cpu_die(unsigned int cpu)
  96{
  97        smp_ops.cpu_die(cpu);
  98}
  99
 100static inline void play_dead(void)
 101{
 102        smp_ops.play_dead();
 103}
 104
 105static inline void smp_send_reschedule(int cpu)
 106{
 107        smp_ops.smp_send_reschedule(cpu);
 108}
 109
 110static inline void arch_send_call_function_single_ipi(int cpu)
 111{
 112        smp_ops.send_call_func_single_ipi(cpu);
 113}
 114
 115static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
 116{
 117        smp_ops.send_call_func_ipi(mask);
 118}
 119
 120void cpu_disable_common(void);
 121void native_smp_prepare_boot_cpu(void);
 122void native_smp_prepare_cpus(unsigned int max_cpus);
 123void calculate_max_logical_packages(void);
 124void native_smp_cpus_done(unsigned int max_cpus);
 125int common_cpu_up(unsigned int cpunum, struct task_struct *tidle);
 126int native_cpu_up(unsigned int cpunum, struct task_struct *tidle);
 127int native_cpu_disable(void);
 128int common_cpu_die(unsigned int cpu);
 129void native_cpu_die(unsigned int cpu);
 130void hlt_play_dead(void);
 131void native_play_dead(void);
 132void play_dead_common(void);
 133void wbinvd_on_cpu(int cpu);
 134int wbinvd_on_all_cpus(void);
 135void cond_wakeup_cpu0(void);
 136
 137void native_smp_send_reschedule(int cpu);
 138void native_send_call_func_ipi(const struct cpumask *mask);
 139void native_send_call_func_single_ipi(int cpu);
 140void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle);
 141
 142void smp_store_boot_cpu_info(void);
 143void smp_store_cpu_info(int id);
 144
 145asmlinkage __visible void smp_reboot_interrupt(void);
 146__visible void smp_reschedule_interrupt(struct pt_regs *regs);
 147__visible void smp_call_function_interrupt(struct pt_regs *regs);
 148__visible void smp_call_function_single_interrupt(struct pt_regs *r);
 149
 150#define cpu_physical_id(cpu)    per_cpu(x86_cpu_to_apicid, cpu)
 151#define cpu_acpi_id(cpu)        per_cpu(x86_cpu_to_acpiid, cpu)
 152
 153/*
 154 * This function is needed by all SMP systems. It must _always_ be valid
 155 * from the initial startup. We map APIC_BASE very early in page_setup(),
 156 * so this is correct in the x86 case.
 157 */
 158#define raw_smp_processor_id()  this_cpu_read(cpu_number)
 159#define __smp_processor_id() __this_cpu_read(cpu_number)
 160
 161#ifdef CONFIG_X86_32
 162extern int safe_smp_processor_id(void);
 163#else
 164# define safe_smp_processor_id()        smp_processor_id()
 165#endif
 166
 167#else /* !CONFIG_SMP */
 168#define wbinvd_on_cpu(cpu)     wbinvd()
 169static inline int wbinvd_on_all_cpus(void)
 170{
 171        wbinvd();
 172        return 0;
 173}
 174#endif /* CONFIG_SMP */
 175
 176extern unsigned disabled_cpus;
 177
 178#ifdef CONFIG_X86_LOCAL_APIC
 179extern int hard_smp_processor_id(void);
 180
 181#else /* CONFIG_X86_LOCAL_APIC */
 182#define hard_smp_processor_id() 0
 183#endif /* CONFIG_X86_LOCAL_APIC */
 184
 185#ifdef CONFIG_DEBUG_NMI_SELFTEST
 186extern void nmi_selftest(void);
 187#else
 188#define nmi_selftest() do { } while (0)
 189#endif
 190
 191#endif /* __ASSEMBLY__ */
 192#endif /* _ASM_X86_SMP_H */
 193