diff options
| author | Alexander Gordeev <agordeev@linux.ibm.com> | 2022-09-02 10:05:08 +0200 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2022-09-14 16:46:00 +0200 |
| commit | 14a3a2624285d36624966935ec12f228d876c028 (patch) | |
| tree | 0657050efce003fc42e18d228459e702261b0bb1 /arch/s390/kernel/setup.c | |
| parent | 2187582c361fcd33a6ab5e9e6fef5b774c3b8cda (diff) | |
s390/dump: save IPL CPU registers once DAT is available
Function smp_save_dump_cpus() collects CPU state of a crashed
system for secondary CPUs and for the IPL CPU very differently.
The Signal Processor stop-and-store-status orders are used for
the former while Hardware System Area requests and memcpy_real()
routine are called for the latter. In addition a system reset is
triggered, which pins smp_save_dump_cpus() function call before
CPU and device initialization.
Move the collection of IPL CPU state to a later stage when DAT
becomes available. That is needed to allow a follow-up rework of
memcpy_real() routine.
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'arch/s390/kernel/setup.c')
| -rw-r--r-- | arch/s390/kernel/setup.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index 8d0a670c9f48..d1390899a8e7 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -1028,10 +1028,10 @@ void __init setup_arch(char **cmdline_p) reserve_crashkernel(); #ifdef CONFIG_CRASH_DUMP /* - * Be aware that smp_save_dump_cpus() triggers a system reset. + * Be aware that smp_save_dump_secondary_cpus() triggers a system reset. * Therefore CPU and device initialization should be done afterwards. */ - smp_save_dump_cpus(); + smp_save_dump_secondary_cpus(); #endif setup_resources(); @@ -1056,6 +1056,9 @@ void __init setup_arch(char **cmdline_p) * in lowcore can now run with DAT enabled. */ setup_lowcore_dat_on(); +#ifdef CONFIG_CRASH_DUMP + smp_save_dump_ipl_cpu(); +#endif /* Setup default console */ conmode_default(); |