| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef _ASM_X86_SMP_H |
| #define _ASM_X86_SMP_H |
| #ifndef __ASSEMBLY__ |
| #include <linux/cpumask.h> |
| |
| #include <asm/cpumask.h> |
| #include <asm/current.h> |
| #include <asm/thread_info.h> |
| |
| extern int smp_num_siblings; |
| extern unsigned int num_processors; |
| |
| DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_sibling_map); |
| DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_core_map); |
| DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_die_map); |
| /* cpus sharing the last level cache: */ |
| DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map); |
| DECLARE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_l2c_shared_map); |
| DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_llc_id); |
| DECLARE_PER_CPU_READ_MOSTLY(u16, cpu_l2c_id); |
| |
| DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_cpu_to_apicid); |
| DECLARE_EARLY_PER_CPU_READ_MOSTLY(u32, x86_cpu_to_acpiid); |
| |
| struct task_struct; |
| |
| 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 (*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_boot_cpu(void) |
| { |
| smp_ops.smp_prepare_boot_cpu(); |
| } |
| |
| 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 calculate_max_logical_packages(void); |
| 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 native_play_dead(void); |
| void play_dead_common(void); |
| void wbinvd_on_cpu(int cpu); |
| int wbinvd_on_all_cpus(void); |
| |
| void smp_kick_mwait_play_dead(void); |
| |
| void native_smp_send_reschedule(int cpu); |
| void native_send_call_func_ipi(const struct cpumask *mask); |
| void native_send_call_func_single_ipi(int cpu); |
| |
| bool smp_park_other_cpus_in_init(void); |
| void smp_store_cpu_info(int id); |
| |
| 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); |
| |
| #define cpu_physical_id(cpu) per_cpu(x86_cpu_to_apicid, cpu) |
| #define cpu_acpi_id(cpu) per_cpu(x86_cpu_to_acpiid, cpu) |
| |
| /* |
| * This function is needed by all SMP systems. It must _always_ be valid |
| * from the initial startup. |
| */ |
| #define raw_smp_processor_id() this_cpu_read(pcpu_hot.cpu_number) |
| #define __smp_processor_id() __this_cpu_read(pcpu_hot.cpu_number) |
| |
| #ifdef CONFIG_X86_32 |
| extern int safe_smp_processor_id(void); |
| #else |
| # define safe_smp_processor_id() smp_processor_id() |
| #endif |
| |
| static inline struct cpumask *cpu_llc_shared_mask(int cpu) |
| { |
| return per_cpu(cpu_llc_shared_map, cpu); |
| } |
| |
| static inline struct cpumask *cpu_l2c_shared_mask(int cpu) |
| { |
| return per_cpu(cpu_l2c_shared_map, cpu); |
| } |
| |
| #else /* !CONFIG_SMP */ |
| #define wbinvd_on_cpu(cpu) wbinvd() |
| static inline int wbinvd_on_all_cpus(void) |
| { |
| wbinvd(); |
| return 0; |
| } |
| |
| static inline struct cpumask *cpu_llc_shared_mask(int cpu) |
| { |
| return (struct cpumask *)cpumask_of(0); |
| } |
| #endif /* CONFIG_SMP */ |
| |
| extern unsigned disabled_cpus; |
| |
| #ifdef CONFIG_DEBUG_NMI_SELFTEST |
| extern void nmi_selftest(void); |
| #else |
| #define nmi_selftest() do { } while (0) |
| #endif |
| |
| extern unsigned int smpboot_control; |
| extern unsigned long apic_mmio_base; |
| |
| #endif /* !__ASSEMBLY__ */ |
| |
| /* Control bits for startup_64 */ |
| #define STARTUP_READ_APICID 0x80000000 |
| |
| /* Top 8 bits are reserved for control */ |
| #define STARTUP_PARALLEL_MASK 0xFF000000 |
| |
| #endif /* _ASM_X86_SMP_H */ |