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);
135
136void native_smp_send_reschedule(int cpu);
137void native_send_call_func_ipi(const struct cpumask *mask);
138void native_send_call_func_single_ipi(int cpu);
139void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle);
140
141void smp_store_boot_cpu_info(void);
142void smp_store_cpu_info(int id);
143
144asmlinkage __visible void smp_reboot_interrupt(void);
145__visible void smp_reschedule_interrupt(struct pt_regs *regs);
146__visible void smp_call_function_interrupt(struct pt_regs *regs);
147__visible void smp_call_function_single_interrupt(struct pt_regs *r);
148
149#define cpu_physical_id(cpu)	per_cpu(x86_cpu_to_apicid, cpu)
150#define cpu_acpi_id(cpu)	per_cpu(x86_cpu_to_acpiid, cpu)
151
152/*
153 * This function is needed by all SMP systems. It must _always_ be valid
154 * from the initial startup. We map APIC_BASE very early in page_setup(),
155 * so this is correct in the x86 case.
156 */
157#define raw_smp_processor_id()  this_cpu_read(cpu_number)
158#define __smp_processor_id() __this_cpu_read(cpu_number)
159
160#ifdef CONFIG_X86_32
161extern int safe_smp_processor_id(void);
162#else
163# define safe_smp_processor_id()	smp_processor_id()
164#endif
165
166#else /* !CONFIG_SMP */
167#define wbinvd_on_cpu(cpu)     wbinvd()
168static inline int wbinvd_on_all_cpus(void)
169{
170	wbinvd();
171	return 0;
172}
173#endif /* CONFIG_SMP */
174
175extern unsigned disabled_cpus;
176
177#ifdef CONFIG_X86_LOCAL_APIC
178extern int hard_smp_processor_id(void);
179
180#else /* CONFIG_X86_LOCAL_APIC */
181#define hard_smp_processor_id()	0
182#endif /* CONFIG_X86_LOCAL_APIC */
183
184#ifdef CONFIG_DEBUG_NMI_SELFTEST
185extern void nmi_selftest(void);
186#else
187#define nmi_selftest() do { } while (0)
188#endif
189
190#endif /* __ASSEMBLY__ */
191#endif /* _ASM_X86_SMP_H */