smp.h 5.13 KB
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_X86_SMP_H
#define _ASM_X86_SMP_H
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#ifndef __ASSEMBLY__
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#include <linux/cpumask.h>
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#include <asm/percpu.h>
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/*
 * We need the APIC definitions automatically as part of 'smp.h'
 */
#ifdef CONFIG_X86_LOCAL_APIC
# include <asm/mpspec.h>
# include <asm/apic.h>
# ifdef CONFIG_X86_IO_APIC
#  include <asm/io_apic.h>
# endif
#endif
#include <asm/thread_info.h>
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#include <asm/cpumask.h>
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extern int smp_num_siblings;
extern unsigned int num_processors;
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DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_sibling_map);
DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_map);
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DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_die_map);
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/* cpus sharing the last level cache: */
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DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map);
DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_llc_id);
DECLARE_PER_CPU_READ_MOSTLY(int, cpu_number);
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static inline struct cpumask *cpu_llc_shared_mask(int cpu)
{
	return per_cpu(cpu_llc_shared_map, cpu);
}

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DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid);
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DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid);
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DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid);
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#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
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DECLARE_EARLY_PER_CPU_READ_MOSTLY(int, x86_cpu_to_logical_apicid);
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#endif
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struct task_struct;

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

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	void (*stop_other_cpus)(int wait);
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	void (*crash_stop_other_cpus)(void);
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	void (*smp_send_reschedule)(int cpu);
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	int (*cpu_up)(unsigned cpu, struct task_struct *tidle);
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	int (*cpu_disable)(void);
	void (*cpu_die)(unsigned int cpu);
	void (*play_dead)(void);

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

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

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#ifdef CONFIG_SMP
extern struct smp_ops smp_ops;
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static inline void smp_send_stop(void)
{
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	smp_ops.stop_other_cpus(0);
}

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

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static inline void smp_prepare_boot_cpu(void)
{
	smp_ops.smp_prepare_boot_cpu();
}

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

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

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static inline int __cpu_up(unsigned int cpu, struct task_struct *tidle)
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{
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	return smp_ops.cpu_up(cpu, tidle);
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}

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

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

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

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

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static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
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{
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	smp_ops.send_call_func_ipi(mask);
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}
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void cpu_disable_common(void);
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void native_smp_prepare_boot_cpu(void);
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void native_smp_prepare_cpus(unsigned int max_cpus);
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void calculate_max_logical_packages(void);
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void native_smp_cpus_done(unsigned int max_cpus);
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int common_cpu_up(unsigned int cpunum, struct task_struct *tidle);
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int native_cpu_up(unsigned int cpunum, struct task_struct *tidle);
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int native_cpu_disable(void);
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int common_cpu_die(unsigned int cpu);
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void native_cpu_die(unsigned int cpu);
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void hlt_play_dead(void);
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void native_play_dead(void);
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void play_dead_common(void);
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void wbinvd_on_cpu(int cpu);
int wbinvd_on_all_cpus(void);
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void native_smp_send_reschedule(int cpu);
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void native_send_call_func_ipi(const struct cpumask *mask);
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void native_send_call_func_single_ipi(int cpu);
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void x86_idle_thread_init(unsigned int cpu, struct task_struct *idle);
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void smp_store_boot_cpu_info(void);
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void smp_store_cpu_info(int id);
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asmlinkage __visible void smp_reboot_interrupt(void);
__visible void smp_reschedule_interrupt(struct pt_regs *regs);
__visible void smp_call_function_interrupt(struct pt_regs *regs);
__visible void smp_call_function_single_interrupt(struct pt_regs *r);

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#define cpu_physical_id(cpu)	per_cpu(x86_cpu_to_apicid, cpu)
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#define cpu_acpi_id(cpu)	per_cpu(x86_cpu_to_acpiid, cpu)
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/*
 * This function is needed by all SMP systems. It must _always_ be valid
 * from the initial startup. We map APIC_BASE very early in page_setup(),
 * so this is correct in the x86 case.
 */
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#define raw_smp_processor_id()  this_cpu_read(cpu_number)
#define __smp_processor_id() __this_cpu_read(cpu_number)
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#ifdef CONFIG_X86_32
extern int safe_smp_processor_id(void);
#else
# define safe_smp_processor_id()	smp_processor_id()
#endif

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#else /* !CONFIG_SMP */
#define wbinvd_on_cpu(cpu)     wbinvd()
static inline int wbinvd_on_all_cpus(void)
{
	wbinvd();
	return 0;
}
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#endif /* CONFIG_SMP */
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extern unsigned disabled_cpus;
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#ifdef CONFIG_X86_LOCAL_APIC
extern int hard_smp_processor_id(void);

#else /* CONFIG_X86_LOCAL_APIC */
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#define hard_smp_processor_id()	0
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#endif /* CONFIG_X86_LOCAL_APIC */

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#ifdef CONFIG_DEBUG_NMI_SELFTEST
extern void nmi_selftest(void);
#else
#define nmi_selftest() do { } while (0)
#endif

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#endif /* __ASSEMBLY__ */
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#endif /* _ASM_X86_SMP_H */