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#include <asm/processor.h> 14 15#define raw_smp_processor_id() (S390_lowcore.cpu_nr) 16 17extern struct mutex smp_cpu_state_mutex; 18extern unsigned int smp_cpu_mt_shift; 19extern unsigned int smp_cpu_mtid; 20extern __vector128 __initdata boot_cpu_vector_save_area[__NUM_VXRS]; 21 22extern int __cpu_up(unsigned int cpu, struct task_struct *tidle); 23 24extern void arch_send_call_function_single_ipi(int cpu); 25extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); 26 27extern void smp_call_online_cpu(void (*func)(void *), void *); 28extern void smp_call_ipl_cpu(void (*func)(void *), void *); 29extern void smp_emergency_stop(void); 30 31extern int smp_find_processor_id(u16 address); 32extern int smp_store_status(int cpu); 33extern void smp_save_dump_cpus(void); 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 int smp_cpu_get_cpu_address(int cpu); 38extern void smp_fill_possible_mask(void); 39extern void smp_detect_cpus(void); 40 41static inline void smp_stop_cpu(void) 42{ 43 u16 pcpu = stap(); 44 45 for (;;) { 46 __pcpu_sigp(pcpu, SIGP_STOP, 0, NULL); 47 cpu_relax(); 48 } 49} 50 51/* Return thread 0 CPU number as base CPU */ 52static inline int smp_get_base_cpu(int cpu) 53{ 54 return cpu - (cpu % (smp_cpu_mtid + 1)); 55} 56 57static inline void smp_cpus_done(unsigned int max_cpus) 58{ 59} 60 61extern int smp_rescan_cpus(void); 62extern void __noreturn cpu_die(void); 63extern void __cpu_die(unsigned int cpu); 64extern int __cpu_disable(void); 65extern void schedule_mcck_handler(void); 66void notrace smp_yield_cpu(int cpu); 67 68#endif /* __ASM_SMP_H */ 69