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android-kvm / linux / 2f6e5f9458646263d3d9ffadd5e11e3d8d15a7d0 / . / arch / s390 / include / asm / smp.h
blob: 797f7872968020aa26430e72b847c6ec8a2ee887 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1/*
Martin Schwidefsky8b646bd2012-03-11 11:59:26 -0400[diff] [blame]2 * Copyright IBM Corp. 1999,2012
Heiko Carstensc20c89a2009-12-07 12:52:07 +0100[diff] [blame]3 * Author(s): Denis Joseph Barrow,
4 * Martin Schwidefsky <schwidefsky@de.ibm.com>,
5 * Heiko Carstens <heiko.carstens@de.ibm.com>,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]6 */
7#ifndef __ASM_SMP_H
8#define __ASM_SMP_H
9
Heiko Carstensc20c89a2009-12-07 12:52:07 +0100[diff] [blame]10#ifdef CONFIG_SMP
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]11
Heiko Carstens2e5061e2008-04-30 13:38:45 +0200[diff] [blame]12#include <asm/system.h>
Heiko Carstens2b67fc42007-02-05 21:16:47 +0100[diff] [blame]13
Martin Schwidefsky7b468482009-03-26 15:24:42 +0100[diff] [blame]14#define raw_smp_processor_id() (S390_lowcore.cpu_nr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]15
Heiko Carstensdbd70fb2008-04-17 07:46:12 +0200[diff] [blame]16extern struct mutex smp_cpu_state_mutex;
Martin Schwidefsky8b646bd2012-03-11 11:59:26 -0400[diff] [blame]17extern struct save_area *zfcpdump_save_areas[NR_CPUS + 1];
18
19extern int __cpu_up(unsigned int cpu);
Heiko Carstensdbd70fb2008-04-17 07:46:12 +0200[diff] [blame]20
Heiko Carstensca9fc752008-12-25 13:38:39 +0100[diff] [blame]21extern void arch_send_call_function_single_ipi(int cpu);
Rusty Russell630cd042009-09-24 09:34:45 -0600[diff] [blame]22extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
Heiko Carstensca9fc752008-12-25 13:38:39 +0100[diff] [blame]23
Martin Schwidefsky8b646bd2012-03-11 11:59:26 -0400[diff] [blame]24extern void smp_call_online_cpu(void (*func)(void *), void *);
25extern void smp_call_ipl_cpu(void (*func)(void *), void *);
Heiko Carstensc20c89a2009-12-07 12:52:07 +0100[diff] [blame]26
Martin Schwidefsky8b646bd2012-03-11 11:59:26 -0400[diff] [blame]27extern int smp_find_processor_id(u16 address);
28extern int smp_store_status(int cpu);
29extern int smp_vcpu_scheduled(int cpu);
30extern void smp_yield_cpu(int cpu);
31extern void smp_yield(void);
32extern void smp_stop_cpu(void);
Gerald Schaefer59b69782010-02-26 22:37:40 +0100[diff] [blame]33
Heiko Carstens2c2df112010-02-26 22:37:34 +0100[diff] [blame]34#else /* CONFIG_SMP */
35
Martin Schwidefsky8b646bd2012-03-11 11:59:26 -0400[diff] [blame]36static inline void smp_call_ipl_cpu(void (*func)(void *), void *data)
Heiko Carstens2c2df112010-02-26 22:37:34 +0100[diff] [blame]37{
38 func(data);
39}
40
Martin Schwidefsky8b646bd2012-03-11 11:59:26 -0400[diff] [blame]41static inline void smp_call_online_cpu(void (*func)(void *), void *data)
Michael Holzheu1943f532011-10-30 15:16:38 +0100[diff] [blame]42{
Martin Schwidefsky8b646bd2012-03-11 11:59:26 -0400[diff] [blame]43 func(data);
Michael Holzheu1943f532011-10-30 15:16:38 +0100[diff] [blame]44}
45
Martin Schwidefsky8b646bd2012-03-11 11:59:26 -0400[diff] [blame]46static inline int smp_find_processor_id(int address) { return 0; }
47static inline int smp_vcpu_scheduled(int cpu) { return 1; }
48static inline void smp_yield_cpu(int cpu) { }
49static inline void smp_yield(void) { }
50static inline void smp_stop_cpu(void) { }
Gerald Schaefer59b69782010-02-26 22:37:40 +0100[diff] [blame]51
Heiko Carstensc20c89a2009-12-07 12:52:07 +0100[diff] [blame]52#endif /* CONFIG_SMP */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]53
Heiko Carstens1e489512008-04-30 13:38:37 +0200[diff] [blame]54#ifdef CONFIG_HOTPLUG_CPU
55extern int smp_rescan_cpus(void);
Heiko Carstensda7f51c2011-01-05 12:48:09 +0100[diff] [blame]56extern void __noreturn cpu_die(void);
Martin Schwidefsky8b646bd2012-03-11 11:59:26 -0400[diff] [blame]57extern void __cpu_die(unsigned int cpu);
58extern int __cpu_disable(void);
Heiko Carstens1e489512008-04-30 13:38:37 +0200[diff] [blame]59#else
60static inline int smp_rescan_cpus(void) { return 0; }
Heiko Carstensda7f51c2011-01-05 12:48:09 +0100[diff] [blame]61static inline void cpu_die(void) { }
Heiko Carstens1e489512008-04-30 13:38:37 +0200[diff] [blame]62#endif
63
Heiko Carstensc20c89a2009-12-07 12:52:07 +0100[diff] [blame]64#endif /* __ASM_SMP_H */