diff options
| author | Martin Schwidefsky | 2015-10-29 10:28:26 +0100 |
|---|---|---|
| committer | Martin Schwidefsky | 2015-11-27 09:24:14 +0100 |
| commit | 1a36a39e225d3558fb3776a3d3d7736cf1ec9f60 (patch) | |
| tree | 63a1c8892ff95dac939beb6e7a13456fcec20cb7 /drivers/s390/cio | |
| parent | f08b8414632c9f256e33f0a18104d8d5e103d204 (diff) | |
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 'drivers/s390/cio')
| -rw-r--r-- | drivers/s390/cio/cio.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c index 690b8547e828..e0d02952a7f4 100644 --- a/drivers/s390/cio/cio.c +++ b/drivers/s390/cio/cio.c @@ -917,7 +917,7 @@ void reipl_ccw_dev(struct ccw_dev_id *devid) { struct subchannel_id uninitialized_var(schid); - s390_reset_system(NULL, NULL, NULL); + s390_reset_system(); if (reipl_find_schid(devid, &schid) != 0) panic("IPL Device not found\n"); do_reipl_asm(*((__u32*)&schid)); |