tree 388aeac39e9fad5f7cadcc8fcbf0838811f5829d
parent 7039d3a11c4b4b59f9ef933b4b0a28304bdd07d1
author Michael Holzheu <holzheu@de.ibm.com> 1177682509 +0200
committer Martin Schwidefsky <schwidefsky@de.ibm.com> 1177682504 +0200

[S390] zfcpdump support.

s390 machines provide hardware support for creating Linux dumps on SCSI
disks. For creating a dump a special purpose dump Linux is used. The first
32 MB of memory are saved by the hardware before the dump Linux is
booted. Via an SCLP interface, the saved memory can be accessed from
Linux. This patch exports memory and registers of the crashed Linux to
userspace via a debugfs file. For more information refer to
Documentation/s390/zfcpdump.txt, which is included in this patch.

Signed-off-by: Michael Holzheu <holzheu@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>