1/* SPDX-License-Identifier: GPL-2.0 */ 2/* 3 * Copyright IBM Corp. 1999, 2012 4 * Author(s): Denis Joseph Barrow, 5 * Martin Schwidefsky <schwidefsky@de.ibm.com>, 6 * Heiko Carstens <heiko.carstens@de.ibm.com>, 7 */ 8#ifndef __ASM_SMP_H 9#define __ASM_SMP_H 10 11#include <asm/sigp.h> 12#include <asm/lowcore.h> 13 14#define raw_smp_processor_id() (S390_lowcore.cpu_nr) 15 16extern struct mutex smp_cpu_state_mutex; 17extern unsigned int smp_cpu_mt_shift; 18extern unsigned int smp_cpu_mtid; 19extern __vector128 __initdata boot_cpu_vector_save_area[__NUM_VXRS]; 20 21extern int __cpu_up(unsigned int cpu, struct task_struct *tidle); 22 23extern void arch_send_call_function_single_ipi(int cpu); 24extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); 25 26extern void smp_call_online_cpu(void (*func)(void *), void *); 27extern void smp_call_ipl_cpu(void (*func)(void *), void *); 28extern void smp_emergency_stop(void); 29 30extern int smp_find_processor_id(u16 address); 31extern int smp_store_status(int cpu); 32extern void smp_save_dump_cpus(void); 33extern int smp_vcpu_scheduled(int cpu); 34extern void smp_yield_cpu(int cpu); 35extern void smp_cpu_set_polarization(int cpu, int val); 36extern int smp_cpu_get_polarization(int cpu); 37extern void smp_fill_possible_mask(void); 38extern void smp_detect_cpus(void); 39 40static inline void smp_stop_cpu(void) 41{ 42 u16 pcpu = stap(); 43 44 for (;;) { 45 __pcpu_sigp(pcpu, SIGP_STOP, 0, NULL); 46 cpu_relax(); 47 } 48} 49 50/* Return thread 0 CPU number as base CPU */ 51static inline int smp_get_base_cpu(int cpu) 52{ 53 return cpu - (cpu % (smp_cpu_mtid + 1)); 54} 55 56extern int smp_rescan_cpus(void); 57extern void __noreturn cpu_die(void); 58extern void __cpu_die(unsigned int cpu); 59extern int __cpu_disable(void); 60 61#endif /* __ASM_SMP_H */ 62