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To collect the CPU registers of the crashed system allocated a single page with memblock_alloc_base and use it as a copy buffer. Replace the stop-and-store-status sigp with a store-status-at-address sigp in smp_save_dump_cpus() and smp_store_status(). In both cases the target CPU is already stopped and store-status-at-address avoids the detour via the absolute zero page. For kexec simplify s390_reset_system and call store_status() before the prefix register of the boot CPU has been set to zero. Use STPX to store the prefix register and remove dump_prefix_page. Acked-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
20 lines
432 B
C
20 lines
432 B
C
/*
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* Copyright IBM Corp. 2006
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* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
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*/
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#ifndef _ASM_S390_RESET_H
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#define _ASM_S390_RESET_H
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#include <linux/list.h>
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struct reset_call {
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struct list_head list;
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void (*fn)(void);
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};
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extern void register_reset_call(struct reset_call *reset);
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extern void unregister_reset_call(struct reset_call *reset);
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extern void s390_reset_system(void);
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#endif /* _ASM_S390_RESET_H */
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