87e28a15c4
When we intercept a DIAG_9C from the guest we verify that the target real CPU associated with the virtual CPU designated by the guest is running and if not we forward the DIAG_9C to the target real CPU. To avoid a diag9c storm we allow a maximal rate of diag9c forwarding. The rate is calculated as a count per second defined as a new parameter of the s390 kvm module: diag9c_forwarding_hz . The default value of 0 is to not forward diag9c. Signed-off-by: Pierre Morel <pmorel@linux.ibm.com> Link: https://lore.kernel.org/r/1613997661-22525-2-git-send-email-pmorel@linux.ibm.com Reviewed-by: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
69 lines
1.9 KiB
C
69 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright IBM Corp. 1999, 2012
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* Author(s): Denis Joseph Barrow,
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* Martin Schwidefsky <schwidefsky@de.ibm.com>,
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* Heiko Carstens <heiko.carstens@de.ibm.com>,
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*/
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#ifndef __ASM_SMP_H
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#define __ASM_SMP_H
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#include <asm/sigp.h>
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#include <asm/lowcore.h>
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#include <asm/processor.h>
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#define raw_smp_processor_id() (S390_lowcore.cpu_nr)
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extern struct mutex smp_cpu_state_mutex;
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extern unsigned int smp_cpu_mt_shift;
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extern unsigned int smp_cpu_mtid;
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extern __vector128 __initdata boot_cpu_vector_save_area[__NUM_VXRS];
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extern int __cpu_up(unsigned int cpu, struct task_struct *tidle);
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extern void arch_send_call_function_single_ipi(int cpu);
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extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
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extern void smp_call_online_cpu(void (*func)(void *), void *);
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extern void smp_call_ipl_cpu(void (*func)(void *), void *);
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extern void smp_emergency_stop(void);
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extern int smp_find_processor_id(u16 address);
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extern int smp_store_status(int cpu);
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extern void smp_save_dump_cpus(void);
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extern void smp_yield_cpu(int cpu);
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extern void smp_cpu_set_polarization(int cpu, int val);
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extern int smp_cpu_get_polarization(int cpu);
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extern int smp_cpu_get_cpu_address(int cpu);
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extern void smp_fill_possible_mask(void);
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extern void smp_detect_cpus(void);
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static inline void smp_stop_cpu(void)
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{
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u16 pcpu = stap();
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for (;;) {
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__pcpu_sigp(pcpu, SIGP_STOP, 0, NULL);
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cpu_relax();
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}
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}
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/* Return thread 0 CPU number as base CPU */
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static inline int smp_get_base_cpu(int cpu)
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{
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return cpu - (cpu % (smp_cpu_mtid + 1));
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}
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static inline void smp_cpus_done(unsigned int max_cpus)
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{
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}
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extern int smp_rescan_cpus(void);
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extern void __noreturn cpu_die(void);
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extern void __cpu_die(unsigned int cpu);
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extern int __cpu_disable(void);
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extern void schedule_mcck_handler(void);
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void notrace smp_yield_cpu(int cpu);
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#endif /* __ASM_SMP_H */
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