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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2015-10-29 12:28:26 +0300 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2015-11-27 11:24:14 +0300 |
| commit | 1a36a39e225d3558fb3776a3d3d7736cf1ec9f60 (patch) | |
| tree | 63a1c8892ff95dac939beb6e7a13456fcec20cb7 /arch/s390/include/asm/ipl.h | |
| parent | f08b8414632c9f256e33f0a18104d8d5e103d204 (diff) | |
| download | linux-1a36a39e225d3558fb3776a3d3d7736cf1ec9f60.tar.xz | |
s390/dump: rework CPU register dump code
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>
Diffstat (limited to 'arch/s390/include/asm/ipl.h')
| -rw-r--r-- | arch/s390/include/asm/ipl.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/s390/include/asm/ipl.h b/arch/s390/include/asm/ipl.h index 86634e71b69f..1dc55db8cd81 100644 --- a/arch/s390/include/asm/ipl.h +++ b/arch/s390/include/asm/ipl.h @@ -87,7 +87,6 @@ struct ipl_parameter_block { * IPL validity flags */ extern u32 ipl_flags; -extern u32 dump_prefix_page; struct dump_save_areas { struct save_area_ext **areas; @@ -176,7 +175,7 @@ enum diag308_rc { extern int diag308(unsigned long subcode, void *addr); extern void diag308_reset(void); -extern void store_status(void); +extern void store_status(void (*fn)(void *), void *data); extern void lgr_info_log(void); #endif /* _ASM_S390_IPL_H */ |