mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-27 19:15:04 +07:00
f4192bf2dc
Currently the smp_stop_cpu() function for SMP kernels enters a busy loop when "begin" is entered on the z/VM console after Linux is halted. To avoid this behavior, use the non-SMP variant of smp_stop_cpu() which stops the CPU again after "begin" is entered. As a side effect we now have consistent behavior for SMP and non-SMP Linux. Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
79 lines
2.0 KiB
C
79 lines
2.0 KiB
C
/*
|
|
* Copyright IBM Corp. 1999, 2012
|
|
* Author(s): Denis Joseph Barrow,
|
|
* Martin Schwidefsky <schwidefsky@de.ibm.com>,
|
|
* Heiko Carstens <heiko.carstens@de.ibm.com>,
|
|
*/
|
|
#ifndef __ASM_SMP_H
|
|
#define __ASM_SMP_H
|
|
|
|
#include <asm/sigp.h>
|
|
|
|
#ifdef CONFIG_SMP
|
|
|
|
#include <asm/lowcore.h>
|
|
|
|
#define raw_smp_processor_id() (S390_lowcore.cpu_nr)
|
|
|
|
extern struct mutex smp_cpu_state_mutex;
|
|
|
|
extern int __cpu_up(unsigned int cpu, struct task_struct *tidle);
|
|
|
|
extern void arch_send_call_function_single_ipi(int cpu);
|
|
extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
|
|
|
|
extern void smp_call_online_cpu(void (*func)(void *), void *);
|
|
extern void smp_call_ipl_cpu(void (*func)(void *), void *);
|
|
|
|
extern int smp_find_processor_id(u16 address);
|
|
extern int smp_store_status(int cpu);
|
|
extern int smp_vcpu_scheduled(int cpu);
|
|
extern void smp_yield_cpu(int cpu);
|
|
extern void smp_yield(void);
|
|
extern void smp_cpu_set_polarization(int cpu, int val);
|
|
extern int smp_cpu_get_polarization(int cpu);
|
|
extern void smp_fill_possible_mask(void);
|
|
|
|
#else /* CONFIG_SMP */
|
|
|
|
static inline void smp_call_ipl_cpu(void (*func)(void *), void *data)
|
|
{
|
|
func(data);
|
|
}
|
|
|
|
static inline void smp_call_online_cpu(void (*func)(void *), void *data)
|
|
{
|
|
func(data);
|
|
}
|
|
|
|
static inline int smp_find_processor_id(u16 address) { return 0; }
|
|
static inline int smp_store_status(int cpu) { return 0; }
|
|
static inline int smp_vcpu_scheduled(int cpu) { return 1; }
|
|
static inline void smp_yield_cpu(int cpu) { }
|
|
static inline void smp_yield(void) { }
|
|
static inline void smp_fill_possible_mask(void) { }
|
|
|
|
#endif /* CONFIG_SMP */
|
|
|
|
static inline void smp_stop_cpu(void)
|
|
{
|
|
u16 pcpu = stap();
|
|
|
|
for (;;) {
|
|
__pcpu_sigp(pcpu, SIGP_STOP, 0, NULL);
|
|
cpu_relax();
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_HOTPLUG_CPU
|
|
extern int smp_rescan_cpus(void);
|
|
extern void __noreturn cpu_die(void);
|
|
extern void __cpu_die(unsigned int cpu);
|
|
extern int __cpu_disable(void);
|
|
#else
|
|
static inline int smp_rescan_cpus(void) { return 0; }
|
|
static inline void cpu_die(void) { }
|
|
#endif
|
|
|
|
#endif /* __ASM_SMP_H */
|