arch/x86/include/asm/smp.h

Source file repositories/reference/linux-study-clean/arch/x86/include/asm/smp.h

File Facts

System
Linux kernel
Corpus path
arch/x86/include/asm/smp.h
Extension
.h
Size
5019 bytes
Lines
199
Domain
Architecture Layer
Bucket
arch/x86
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

struct smp_ops {
	void (*smp_prepare_boot_cpu)(void);
	void (*smp_prepare_cpus)(unsigned max_cpus);
	void (*smp_cpus_done)(unsigned max_cpus);

	void (*stop_other_cpus)(int wait);
	void (*crash_stop_other_cpus)(void);
	void (*smp_send_reschedule)(int cpu);

	void (*cleanup_dead_cpu)(unsigned cpu);
	void (*poll_sync_state)(void);
	int (*kick_ap_alive)(unsigned cpu, struct task_struct *tidle);
	int (*cpu_disable)(void);
	void (*cpu_die)(unsigned int cpu);
	void (*play_dead)(void);
	void (*stop_this_cpu)(void);

	void (*send_call_func_ipi)(const struct cpumask *mask);
	void (*send_call_func_single_ipi)(int cpu);
};

/* Globals due to paravirt */
extern void set_cpu_sibling_map(int cpu);

#ifdef CONFIG_SMP
extern struct smp_ops smp_ops;

static inline void smp_send_stop(void)
{
	smp_ops.stop_other_cpus(0);
}

static inline void stop_other_cpus(void)
{
	smp_ops.stop_other_cpus(1);
}

static inline void smp_prepare_cpus(unsigned int max_cpus)
{
	smp_ops.smp_prepare_cpus(max_cpus);
}

static inline void smp_cpus_done(unsigned int max_cpus)
{
	smp_ops.smp_cpus_done(max_cpus);
}

static inline int __cpu_disable(void)
{
	return smp_ops.cpu_disable();
}

static inline void __cpu_die(unsigned int cpu)
{
	if (smp_ops.cpu_die)
		smp_ops.cpu_die(cpu);
}

static inline void __noreturn play_dead(void)
{
	smp_ops.play_dead();
	BUG();
}

static inline void arch_smp_send_reschedule(int cpu)
{
	smp_ops.smp_send_reschedule(cpu);
}

static inline void arch_send_call_function_single_ipi(int cpu)
{
	smp_ops.send_call_func_single_ipi(cpu);
}

static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
{
	smp_ops.send_call_func_ipi(mask);
}

void cpu_disable_common(void);
void native_smp_prepare_boot_cpu(void);
void smp_prepare_cpus_common(void);
void native_smp_prepare_cpus(unsigned int max_cpus);
void native_smp_cpus_done(unsigned int max_cpus);
int common_cpu_up(unsigned int cpunum, struct task_struct *tidle);
int native_kick_ap(unsigned int cpu, struct task_struct *tidle);
int native_cpu_disable(void);
void __noreturn hlt_play_dead(void);
void __noreturn native_play_dead(void);
void play_dead_common(void);

Annotation

Implementation Notes