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