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/*
   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
  21extern int smp_num_siblings;
  22extern unsigned int num_processors;
  23
  24DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_sibling_map);
  25DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_map);
  26DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_die_map);
  27/* cpus sharing the last level cache: */
  28DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map);
  29DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_llc_id);
  30DECLARE_PER_CPU_READ_MOSTLY(int, cpu_number);
  31
  32static inline struct cpumask *cpu_llc_shared_mask(int cpu)
  33{
  34        return per_cpu(cpu_llc_shared_map, cpu);
  35}
  36
  37DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid);
  38DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid);
  39DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid);
  40#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
  41DECLARE_EARLY_PER_CPU_READ_MOSTLY(int, x86_cpu_to_logical_apicid);
  42#endif
  43
  44struct task_struct;
  45
  46struct smp_ops {
  47        void (*smp_prepare_boot_cpu)(void);
  48        void (*smp_prepare_cpus)(unsigned max_cpus);
  49        void (*smp_cpus_done)(unsigned max_cpus);
  50
  51        void (*stop_other_cpus)(int wait);
  52        void (*crash_stop_other_cpus)(void);
  53        void (*smp_send_reschedule)(int cpu);
  54
  55        int (*cpu_up)(unsigned cpu, struct task_struct *tidle);
  56        int (*cpu_disable)(void);
  57        void (*cpu_die)(unsigned int cpu);
  58        void (*play_dead)(void);
  59
  60        void (*send_call_func_ipi)(const struct cpumask *mask);
  61        void (*send_call_func_single_ipi)(int cpu);
  62};
  63
  64/* Globals due to paravirt */
  65extern void set_cpu_sibling_map(int cpu);
  66
  67#ifdef CONFIG_SMP
  68extern struct smp_ops smp_ops;
  69
  70static inline void smp_send_stop(void)
  71{
  72        smp_ops.stop_other_cpus(0);
  73}
  74
  75static inline void stop_other_cpus(void)
  76{
  77        smp_ops.stop_other_cpus(1);
  78}
  79
  80static inline void smp_prepare_boot_cpu(void)
  81{
  82        smp_ops.smp_prepare_boot_cpu();
  83}
  84
  85static inline void smp_prepare_cpus(unsigned int max_cpus)
  86{
  87        smp_ops.smp_prepare_cpus(max_cpus);
  88}
  89
  90static inline void smp_cpus_done(unsigned int max_cpus)
  91{
  92        smp_ops.smp_cpus_done(max_cpus);
  93}
  94
  95static inline int __cpu_up(unsigned int cpu, struct task_struct *tidle)
  96{
  97        return smp_ops.cpu_up(cpu, tidle);
  98}
  99
 100static inline int __cpu_disable(void)
 101{
 102        return smp_ops.cpu_disable();
 103}
 104
 105static inline void __cpu_die(unsigned int cpu)
 106{
 107        smp_ops.cpu_die(cpu);
 108}
 109
 110static inline void play_dead(void)
 111{
 112        smp_ops.play_dead();
 113}
 114
 115static inline void smp_send_reschedule(int cpu)
 116{
 117        smp_ops.smp_send_reschedule(cpu);
 118}
 119
 120static inline void arch_send_call_function_single_ipi(int cpu)
 121{
 122        smp_ops.send_call_func_single_ipi(cpu);
 123}
 124
 125static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
 126{
 127        smp_ops.send_call_func_ipi(mask);
 128}
 129
 130void cpu_disable_common(void);
 131void native_smp_prepare_boot_cpu(void);
 132void native_smp_prepare_cpus(unsigned int max_cpus);
 133void calculate_max_logical_packages(void);
 134void native_smp_cpus_done(unsigned int max_cpus);
 135int common_cpu_up(unsigned int cpunum, struct task_struct *tidle);
 136int native_cpu_up(unsigned int cpunum, struct task_struct *tidle);
 137int native_cpu_disable(void);
 138int common_cpu_die(unsigned int cpu);
 139void native_cpu_die(unsigned int cpu);
 140void hlt_play_dead(void);
 141void native_play_dead(void);
 142void play_dead_common(void);
 143void wbinvd_on_cpu(int cpu);
 144int wbinvd_on_all_cpus(void);
 145void cond_wakeup_cpu0(void);
 146
 147void native_send_call_func_ipi(const struct cpumask *mask);
 148void native_send_call_func_single_ipi(int cpu);
 149void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle);
 150
 151void smp_store_boot_cpu_info(void);
 152void smp_store_cpu_info(int id);
 153
 154asmlinkage __visible void smp_reboot_interrupt(void);
 155__visible void smp_reschedule_interrupt(struct pt_regs *regs);
 156__visible void smp_call_function_interrupt(struct pt_regs *regs);
 157__visible void smp_call_function_single_interrupt(struct pt_regs *r);
 158
 159#define cpu_physical_id(cpu)    per_cpu(x86_cpu_to_apicid, cpu)
 160#define cpu_acpi_id(cpu)        per_cpu(x86_cpu_to_acpiid, cpu)
 161
 162/*
 163 * This function is needed by all SMP systems. It must _always_ be valid
 164 * from the initial startup. We map APIC_BASE very early in page_setup(),
 165 * so this is correct in the x86 case.
 166 */
 167#define raw_smp_processor_id()  this_cpu_read(cpu_number)
 168#define __smp_processor_id() __this_cpu_read(cpu_number)
 169
 170#ifdef CONFIG_X86_32
 171extern int safe_smp_processor_id(void);
 172#else
 173# define safe_smp_processor_id()        smp_processor_id()
 174#endif
 175
 176#else /* !CONFIG_SMP */
 177#define wbinvd_on_cpu(cpu)     wbinvd()
 178static inline int wbinvd_on_all_cpus(void)
 179{
 180        wbinvd();
 181        return 0;
 182}
 183#endif /* CONFIG_SMP */
 184
 185extern unsigned disabled_cpus;
 186
 187#ifdef CONFIG_X86_LOCAL_APIC
 188extern int hard_smp_processor_id(void);
 189
 190#else /* CONFIG_X86_LOCAL_APIC */
 191#define hard_smp_processor_id() 0
 192#endif /* CONFIG_X86_LOCAL_APIC */
 193
 194#ifdef CONFIG_DEBUG_NMI_SELFTEST
 195extern void nmi_selftest(void);
 196#else
 197#define nmi_selftest() do { } while (0)
 198#endif
 199
 200#endif /* __ASSEMBLY__ */
 201#endif /* _ASM_X86_SMP_H */
 202