[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>

1 files changed, 8 insertions, 0 deletions

diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 0f9517bc8e70..e6ec418093e5 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -519,6 +519,14 @@ config KEXEC
           current kernel, and to start another kernel.  It is like a reboot
           but is independent of hardware/microcode support.
 
+config ZFCPDUMP
+        tristate "zfcpdump support"
+        select SMP
+        default n
+        help
+          Select this option if you want to build an zfcpdump enabled kernel.
+          Refer to "Documentation/s390/zfcpdump.txt" for more details on this.
+
 endmenu
 
 source "net/Kconfig"