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 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(cpumask_var_t, cpu_l2c_shared_map); 20DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_llc_id); 21DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_l2c_id); 22 23DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid); 24DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid); 25 26struct task_struct; 27 28struct smp_ops { 29 void (*smp_prepare_boot_cpu)(void); 30 void (*smp_prepare_cpus)(unsigned max_cpus); 31 void (*smp_cpus_done)(unsigned max_cpus); 32 33 void (*stop_other_cpus)(int wait); 34 void (*crash_stop_other_cpus)(void); 35 void (*smp_send_reschedule)(int cpu); 36 37 void (*cleanup_dead_cpu)(unsigned cpu); 38 void (*poll_sync_state)(void); 39 int (*kick_ap_alive)(unsigned cpu, struct task_struct *tidle); 40 int (*cpu_disable)(void); 41 void (*cpu_die)(unsigned int cpu); 42 void (*play_dead)(void); 43 44 void (*send_call_func_ipi)(const struct cpumask *mask); 45 void (*send_call_func_single_ipi)(int cpu); 46}; 47 48/* Globals due to paravirt */ 49extern void set_cpu_sibling_map(int cpu); 50 51#ifdef CONFIG_SMP 52extern struct smp_ops smp_ops; 53 54static inline void smp_send_stop(void) 55{ 56 smp_ops.stop_other_cpus(0); 57} 58 59static inline void stop_other_cpus(void) 60{ 61 smp_ops.stop_other_cpus(1); 62} 63 64static inline void smp_prepare_boot_cpu(void) 65{ 66 smp_ops.smp_prepare_boot_cpu(); 67} 68 69static inline void smp_prepare_cpus(unsigned int max_cpus) 70{ 71 smp_ops.smp_prepare_cpus(max_cpus); 72} 73 74static inline void smp_cpus_done(unsigned int max_cpus) 75{ 76 smp_ops.smp_cpus_done(max_cpus); 77} 78 79static inline int __cpu_disable(void) 80{ 81 return smp_ops.cpu_disable(); 82} 83 84static inline void __cpu_die(unsigned int cpu) 85{ 86 if (smp_ops.cpu_die) 87 smp_ops.cpu_die(cpu); 88} 89 90static inline void __noreturn play_dead(void) 91{ 92 smp_ops.play_dead(); 93 BUG(); 94} 95 96static inline void arch_smp_send_reschedule(int cpu) 97{ 98 smp_ops.smp_send_reschedule(cpu); 99} 100 101static inline void arch_send_call_function_single_ipi(int cpu) 102{ 103 smp_ops.send_call_func_single_ipi(cpu); 104} 105 106static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask) 107{ 108 smp_ops.send_call_func_ipi(mask); 109} 110 111void cpu_disable_common(void); 112void native_smp_prepare_boot_cpu(void); 113void smp_prepare_cpus_common(void); 114void native_smp_prepare_cpus(unsigned int max_cpus); 115void calculate_max_logical_packages(void); 116void native_smp_cpus_done(unsigned int max_cpus); 117int common_cpu_up(unsigned int cpunum, struct task_struct *tidle); 118int native_kick_ap(unsigned int cpu, struct task_struct *tidle); 119int native_cpu_disable(void); 120void __noreturn hlt_play_dead(void); 121void native_play_dead(void); 122void play_dead_common(void); 123void wbinvd_on_cpu(int cpu); 124int wbinvd_on_all_cpus(void); 125 126void smp_kick_mwait_play_dead(void); 127 128void native_smp_send_reschedule(int cpu); 129void native_send_call_func_ipi(const struct cpumask *mask); 130void native_send_call_func_single_ipi(int cpu); 131 132void smp_store_cpu_info(int id); 133 134asmlinkage __visible void smp_reboot_interrupt(void); 135__visible void smp_reschedule_interrupt(struct pt_regs *regs); 136__visible void smp_call_function_interrupt(struct pt_regs *regs); 137__visible void smp_call_function_single_interrupt(struct pt_regs *r); 138 139#define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu) 140#define cpu_acpi_id(cpu) per_cpu(x86_cpu_to_acpiid, cpu) 141 142/* 143 * This function is needed by all SMP systems. It must _always_ be valid 144 * from the initial startup. 145 */ 146#define raw_smp_processor_id() this_cpu_read(pcpu_hot.cpu_number) 147#define __smp_processor_id() __this_cpu_read(pcpu_hot.cpu_number) 148 149#ifdef CONFIG_X86_32 150extern int safe_smp_processor_id(void); 151#else 152# define safe_smp_processor_id() smp_processor_id() 153#endif 154 155static inline struct cpumask *cpu_llc_shared_mask(int cpu) 156{ 157 return per_cpu(cpu_llc_shared_map, cpu); 158} 159 160static inline struct cpumask *cpu_l2c_shared_mask(int cpu) 161{ 162 return per_cpu(cpu_l2c_shared_map, cpu); 163} 164 165#else /* !CONFIG_SMP */ 166#define wbinvd_on_cpu(cpu) wbinvd() 167static inline int wbinvd_on_all_cpus(void) 168{ 169 wbinvd(); 170 return 0; 171} 172 173static inline struct cpumask *cpu_llc_shared_mask(int cpu) 174{ 175 return (struct cpumask *)cpumask_of(0); 176} 177#endif /* CONFIG_SMP */ 178 179extern unsigned disabled_cpus; 180 181#ifdef CONFIG_DEBUG_NMI_SELFTEST 182extern void nmi_selftest(void); 183#else 184#define nmi_selftest() do { } while (0) 185#endif 186 187extern unsigned int smpboot_control; 188extern unsigned long apic_mmio_base; 189 190#endif /* !__ASSEMBLY__ */ 191 192/* Control bits for startup_64 */ 193#define STARTUP_READ_APICID 0x80000000 194 195/* Top 8 bits are reserved for control */ 196#define STARTUP_PARALLEL_MASK 0xFF000000 197 198#endif /* _ASM_X86_SMP_H */ 199