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| author | Michael Holzheu <holzheu@linux.vnet.ibm.com> | 2012-03-11 11:59:32 -0400 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2012-03-11 11:59:29 -0400 |
| commit | 3ab121ab18669226742891416fe7ecc86dadb047 (patch) | |
| tree | 328ef8f1e23da33a475ce4e20c0d0490a2e63e76 /arch/s390/include/asm/ipl.h | |
| parent | fde15c3a3adc7b65cd0610dd6bca4804ee7ffd38 (diff) | |
| download | linux-3ab121ab18669226742891416fe7ecc86dadb047.tar.bz2 | |
[S390] kernel: Add z/VM LGR detection
Currently the following mechanisms are available to move active
Linux on System z instances between machines:
* z/VM 6.2 SSI (Single System Image)
* Suspend/resume
For moving Linux instances in this patch the term LGR (Linux Guest
Relocation) is used. Because such an operation is critical, it
should be detectable from Linux. With this patch for both, a live
system and a kernel dump, the information about LGRs is accessible.
To identify a guest, stsi and stfle data is used. A new function
lgr_info_log() compares the current data (lgr_info_cur) with the
last recorded one (lgr_info_last). In case the two data sets differ,
lgr_info_cur is logged to the "lgr" s390dbf.
The following trigger points call lgr_info_log():
* panic
* die
* kdump
* LGR timer
* PSW restart
* QDIO recovery
* resume
This patch also changes the s390dbf hex_ascii view. Now only printable ASCII
characters are shown.
Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/ipl.h')
| -rw-r--r-- | arch/s390/include/asm/ipl.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/include/asm/ipl.h b/arch/s390/include/asm/ipl.h index 6940abfbe1d9..2bd6cb897b90 100644 --- a/arch/s390/include/asm/ipl.h +++ b/arch/s390/include/asm/ipl.h @@ -169,5 +169,6 @@ enum diag308_rc { extern int diag308(unsigned long subcode, void *addr); extern void diag308_reset(void); extern void store_status(void); +extern void lgr_info_log(void); #endif /* _ASM_S390_IPL_H */ |