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 7#include <asm/cpumask.h> 8#include <asm/current.h> 9#include <asm/thread_info.h> 10 11DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_sibling_map); 12DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_map); 13DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_die_map); 14/* cpus sharing the last level cache: */ 15DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map); 16DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_l2c_shared_map); 17 18DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_apicid); 19DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid); 20 21struct task_struct; 22 23struct smp_ops { 24 void (*smp_prepare_boot_cpu)(void); 25 void (*smp_prepare_cpus)(unsigned max_cpus); 26 void (*smp_cpus_done)(unsigned max_cpus); 27 28 void (*stop_other_cpus)(int wait); 29 void (*crash_stop_other_cpus)(void); 30 void (*smp_send_reschedule)(int cpu); 31 32 void (*cleanup_dead_cpu)(unsigned cpu); 33 void (*poll_sync_state)(void); 34 int (*kick_ap_alive)(unsigned cpu, struct task_struct *tidle); 35 int (*cpu_disable)(void); 36 void (*cpu_die)(unsigned int cpu); 37 void (*play_dead)(void); 38 39 void (*send_call_func_ipi)(const struct cpumask *mask); 40 void (*send_call_func_single_ipi)(int cpu); 41}; 42 43/* Globals due to paravirt */ 44extern void set_cpu_sibling_map(int cpu); 45 46#ifdef CONFIG_SMP 47extern struct smp_ops smp_ops; 48 49static inline void smp_send_stop(void) 50{ 51 smp_ops.stop_other_cpus(0); 52} 53 54static inline void stop_other_cpus(void) 55{ 56 smp_ops.stop_other_cpus(1); 57} 58 59static inline void smp_prepare_cpus(unsigned int max_cpus) 60{ 61 smp_ops.smp_prepare_cpus(max_cpus); 62} 63 64static inline void smp_cpus_done(unsigned int max_cpus) 65{ 66 smp_ops.smp_cpus_done(max_cpus); 67} 68 69static inline int __cpu_disable(void) 70{ 71 return smp_ops.cpu_disable(); 72} 73 74static inline void __cpu_die(unsigned int cpu) 75{ 76 if (smp_ops.cpu_die) 77 smp_ops.cpu_die(cpu); 78} 79 80static inline void __noreturn play_dead(void) 81{ 82 smp_ops.play_dead(); 83 BUG(); 84} 85 86static inline void arch_smp_send_reschedule(int cpu) 87{ 88 smp_ops.smp_send_reschedule(cpu); 89} 90 91static inline void arch_send_call_function_single_ipi(int cpu) 92{ 93 smp_ops.send_call_func_single_ipi(cpu); 94} 95 96static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask) 97{ 98 smp_ops.send_call_func_ipi(mask); 99} 100 101void cpu_disable_common(void); 102void native_smp_prepare_boot_cpu(void); 103void smp_prepare_cpus_common(void); 104void native_smp_prepare_cpus(unsigned int max_cpus); 105void native_smp_cpus_done(unsigned int max_cpus); 106int common_cpu_up(unsigned int cpunum, struct task_struct *tidle); 107int native_kick_ap(unsigned int cpu, struct task_struct *tidle); 108int native_cpu_disable(void); 109void __noreturn hlt_play_dead(void); 110void native_play_dead(void); 111void play_dead_common(void); 112void wbinvd_on_cpu(int cpu); 113int wbinvd_on_all_cpus(void); 114 115void smp_kick_mwait_play_dead(void); 116 117void native_smp_send_reschedule(int cpu); 118void native_send_call_func_ipi(const struct cpumask *mask); 119void native_send_call_func_single_ipi(int cpu); 120 121void smp_store_cpu_info(int id); 122 123asmlinkage __visible void smp_reboot_interrupt(void); 124__visible void smp_reschedule_interrupt(struct pt_regs *regs); 125__visible void smp_call_function_interrupt(struct pt_regs *regs); 126__visible void smp_call_function_single_interrupt(struct pt_regs *r); 127 128#define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu) 129#define cpu_acpi_id(cpu) per_cpu(x86_cpu_to_acpiid, cpu) 130 131/* 132 * This function is needed by all SMP systems. It must _always_ be valid 133 * from the initial startup. 134 */ 135#define raw_smp_processor_id() this_cpu_read(pcpu_hot.cpu_number) 136#define __smp_processor_id() __this_cpu_read(pcpu_hot.cpu_number) 137 138#ifdef CONFIG_X86_32 139extern int safe_smp_processor_id(void); 140#else 141# define safe_smp_processor_id() smp_processor_id() 142#endif 143 144static inline struct cpumask *cpu_llc_shared_mask(int cpu) 145{ 146 return per_cpu(cpu_llc_shared_map, cpu); 147} 148 149static inline struct cpumask *cpu_l2c_shared_mask(int cpu) 150{ 151 return per_cpu(cpu_l2c_shared_map, cpu); 152} 153 154#else /* !CONFIG_SMP */ 155#define wbinvd_on_cpu(cpu) wbinvd() 156static inline int wbinvd_on_all_cpus(void) 157{ 158 wbinvd(); 159 return 0; 160} 161 162static inline struct cpumask *cpu_llc_shared_mask(int cpu) 163{ 164 return (struct cpumask *)cpumask_of(0); 165} 166#endif /* CONFIG_SMP */ 167 168#ifdef CONFIG_DEBUG_NMI_SELFTEST 169extern void nmi_selftest(void); 170#else 171#define nmi_selftest() do { } while (0) 172#endif 173 174extern unsigned int smpboot_control; 175extern unsigned long apic_mmio_base; 176 177#endif /* !__ASSEMBLY__ */ 178 179/* Control bits for startup_64 */ 180#define STARTUP_READ_APICID 0x80000000 181 182/* Top 8 bits are reserved for control */ 183#define STARTUP_PARALLEL_MASK 0xFF000000 184 185#endif /* _ASM_X86_SMP_H */ 186