Searched hist:"3 b9678472bab86ae654cf2c18d5dd551558045be" (Results 1 – 3 of 3) sorted by relevance
| /openbmc/linux/arch/s390/include/asm/ |
| H A D | ipl.h | diff 3b9678472bab86ae654cf2c18d5dd551558045be Wed Apr 04 07:42:41 CDT 2018 Vasily Gorbik <gor@linux.ibm.com> s390/ipl: correct kdump reipl block checksum calculation
s390 kdump reipl implementation relies on os_info kernel structure
residing in old memory being dumped. os_info contains reipl block,
which is used (if valid) by the kdump kernel for reipl parameters.
The problem is that the reipl block and its checksum inside
os_info is updated only when /sys/firmware/reipl/reipl_type is
written. This sets an offset of a reipl block for "reipl_type" and
re-calculates reipl block checksum. Any further alteration of values
under /sys/firmware/reipl/{reipl_type}/ without subsequent write to
/sys/firmware/reipl/reipl_type lead to incorrect os_info reipl block
checksum. In such a case kdump kernel ignores it and reboots using
default logic.
To fix this, os_info reipl block update is moved right before kdump
execution.
Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
|
| /openbmc/linux/arch/s390/kernel/ |
| H A D | machine_kexec.c | diff 3b9678472bab86ae654cf2c18d5dd551558045be Wed Apr 04 07:42:41 CDT 2018 Vasily Gorbik <gor@linux.ibm.com> s390/ipl: correct kdump reipl block checksum calculation
s390 kdump reipl implementation relies on os_info kernel structure
residing in old memory being dumped. os_info contains reipl block,
which is used (if valid) by the kdump kernel for reipl parameters.
The problem is that the reipl block and its checksum inside
os_info is updated only when /sys/firmware/reipl/reipl_type is
written. This sets an offset of a reipl block for "reipl_type" and
re-calculates reipl block checksum. Any further alteration of values
under /sys/firmware/reipl/{reipl_type}/ without subsequent write to
/sys/firmware/reipl/reipl_type lead to incorrect os_info reipl block
checksum. In such a case kdump kernel ignores it and reboots using
default logic.
To fix this, os_info reipl block update is moved right before kdump
execution.
Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
|
| H A D | ipl.c | diff 3b9678472bab86ae654cf2c18d5dd551558045be Wed Apr 04 07:42:41 CDT 2018 Vasily Gorbik <gor@linux.ibm.com> s390/ipl: correct kdump reipl block checksum calculation
s390 kdump reipl implementation relies on os_info kernel structure
residing in old memory being dumped. os_info contains reipl block,
which is used (if valid) by the kdump kernel for reipl parameters.
The problem is that the reipl block and its checksum inside
os_info is updated only when /sys/firmware/reipl/reipl_type is
written. This sets an offset of a reipl block for "reipl_type" and
re-calculates reipl block checksum. Any further alteration of values
under /sys/firmware/reipl/{reipl_type}/ without subsequent write to
/sys/firmware/reipl/reipl_type lead to incorrect os_info reipl block
checksum. In such a case kdump kernel ignores it and reboots using
default logic.
To fix this, os_info reipl block update is moved right before kdump
execution.
Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
|