[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, 2 insertions, 0 deletions

diff --git a/drivers/s390/char/sclp.h b/drivers/s390/char/sclp.h
index 7d29ab45a6ed..6402e943436f 100644
--- a/drivers/s390/char/sclp.h
+++ b/drivers/s390/char/sclp.h
@@ -27,6 +27,7 @@
 #define EvTyp_CntlProgIdent     0x0B
 #define EvTyp_SigQuiesce        0x1D
 #define EvTyp_VT220Msg          0x1A
+#define EvTyp_SDIAS             0x1C
 
 #define EvTyp_OpCmd_Mask        0x80000000
 #define EvTyp_Msg_Mask          0x40000000
@@ -36,6 +37,7 @@
 #define EvTyp_CtlProgIdent_Mask 0x00200000
 #define EvTyp_SigQuiesce_Mask   0x00000008
 #define EvTyp_VT220Msg_Mask     0x00000040
+#define EvTyp_SDIAS_Mask        0x00000010
 
 #define GnrlMsgFlgs_DOM         0x8000
 #define GnrlMsgFlgs_SndAlrm     0x4000