[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, 1 insertions, 0 deletions

diff --git a/arch/s390/defconfig b/arch/s390/defconfig
index 80046d9e2a3b..0e4da8a7d826 100644
--- a/arch/s390/defconfig
+++ b/arch/s390/defconfig
@@ -167,6 +167,7 @@ CONFIG_NO_IDLE_HZ=y
 CONFIG_NO_IDLE_HZ_INIT=y
 CONFIG_S390_HYPFS_FS=y
 CONFIG_KEXEC=y
+# CONFIG_ZFCPDUMP is not set
 
 #
 # Networking