linux/arch/powerpc/platforms/pseries/nvram.c, branch v3.5-rc4

kmsg - kmsg_dump() use iterator to receive log buffer content

2012-06-15T21:53:59Z

Provide an iterator to receive the log buffer content, and convert all kmsg_dump() users to it. The structured data in the kmsg buffer now contains binary data, which should no longer be copied verbatim to the kmsg_dump() users. The iterator should provide reliable access to the buffer data, and also supports proper log line-aware chunking of data while iterating. Signed-off-by: Kay Sievers Tested-by: Tony Luck Reported-by: Anton Vorontsov Tested-by: Anton Vorontsov Signed-off-by: Greg Kroah-Hartman

kexec: remove KMSG_DUMP_KEXEC

2012-01-13T04:13:11Z

KMSG_DUMP_KEXEC is useless because we already save kernel messages inside /proc/vmcore, and it is unsafe to allow modules to do other stuffs in a crash dump scenario. [akpm@linux-foundation.org: fix powerpc build] Signed-off-by: WANG Cong Reported-by: Vivek Goyal Acked-by: Vivek Goyal Acked-by: Jarod Wilson Cc: "Eric W. Biederman" Cc: KOSAKI Motohiro Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

powerpc/nvram: Add spinlock to oops_to_nvram to prevent oops in compression code.

2011-12-08T03:22:54Z

When issuing a system reset we almost always oops in the oops_to_nvram code because multiple CPUs are using the deflate work area. Add a spinlock to protect it. To play it safe I'm using trylock to avoid locking up if the NVRAM code oopses. This means we might miss multiple CPUs oopsing at exactly the same time but I think it's best to play it safe for now. Once we are happy with the reliability we can change it to a full spinlock. Signed-off-by: Anton Blanchard Acked-by: Jim Keniston Signed-off-by: Benjamin Herrenschmidt

powerpc/nvram: Add compression to fit more oops output into NVRAM

2011-09-19T23:19:46Z

Capture more than twice as much text from the printk buffer, and compress it to fit it in the lnx,oops-log NVRAM partition. You can view the compressed text using the new (as of July 20) --unzip option of the nvram command in the powerpc-utils package. [BenH: Added select of ZLIB_DEFLATE] Signed-off-by: Jim Keniston Signed-off-by: Benjamin Herrenschmidt

powerpc/nvram: Don't overwrite oops/panic report on normal shutdown

2011-03-29T23:36:23Z

For normal halt, reboot, and poweroff events, refrain from overwriting the lnx,oops-log partition. Also, don't save the dmesg buffer on an emergency-restart event if we've already saved it earlier in panic(). Signed-off-by: Jim Keniston Signed-off-by: Benjamin Herrenschmidt

powerpc/pseries/nvram: Capture oops/panic reports in ibm, oops-log partition

2011-03-04T07:19:04Z

Create the lnx,oops-log NVRAM partition, and capture the end of the printk buffer in it when there's an oops or panic. If we can't create the lnx,oops-log partition, capture the oops/panic report in ibm,rtas-log. Signed-off-by: Jim Keniston Signed-off-by: Benjamin Herrenschmidt

powerpc/nvram: Generalize code for OS partitions in NVRAM

2011-03-04T07:19:04Z

Adapt the functions used to create and write to the RTAS-log partition to work with any OS-type partition. Signed-off-by: Jim Keniston Signed-off-by: Benjamin Herrenschmidt

powerpc/nvram: Rename ppc64,linux partition to ibm,rtas-log

2010-11-30T04:38:50Z

I'm not aware of any userspace tool accessing it by its name anyways, it's read back by the kernel itself on the next boot to get back older log entries Signed-off-by: Benjamin Herrenschmidt

powerpc/nvram: Move the log partition stuff to pseries

2010-11-30T04:37:45Z

The nvram log partition stuff currently in nvram_64.c is really pseries specific. It isn't actually used on anything else (despite the fact that we ran the code to setup the partition on anything except powermac) and the log format is specific to pseries RTAS implementation. So move it where it belongs Signed-off-by: Benjamin Herrenschmidt

powerpc/nvram: More flexible nvram_create_partition()

2010-11-30T04:31:51Z

Replace nvram_create_os_partition() with a variant that takes the partition name, signature and size as arguments. Signed-off-by: Benjamin Herrenschmidt