Subject: Re: [PATCH v2 0/8] powerpc/pseries: Nvram-to-pstore

From: Aruna Balakrishnaiah <[email-masked]>
Date: Thu, 25 Apr 2013 11:23:18 +0530

Hi Kees,

On Thursday 25 April 2013 02:15 AM, Kees Cook wrote:
> On Tue, Apr 23, 2013 at 11:19 PM, Aruna Balakrishnaiah
> <[email-masked]> wrote:
>> Currently the kernel provides the contents of p-series NVRAM only as a
>> simple stream of bytes via /dev/nvram, which must be interpreted in user
>> space by the nvram command in the powerpc-utils package. This patch set
>> exploits the pstore subsystem to expose each partition in NVRAM as a
>> separate file in /dev/pstore. For instance Oops messages will stored in a
>> file named [dmesg-nvram-2].
>>
>> Changes from v1:
>>          - Reduce #ifdefs by and remove forward declarations of pstore callbacks
>>          - Handle return value of nvram_write_os_partition
>>          - Remove empty pstore callbacks and register pstore only when pstore
>>            is configured
>>
>> ---
>>
>> Aruna Balakrishnaiah (8):
>>        powerpc/pseries: Remove syslog prefix in uncompressed oops text
>>        powerpc/pseries: Add version and timestamp to oops header
>>        powerpc/pseries: Introduce generic read function to read nvram-partitions
>>        powerpc/pseries: Read/Write oops nvram partition via pstore
>>        powerpc/pseries: Read rtas partition via pstore
>>        powerpc/pseries: Distinguish between a os-partition and non-os partition
>>        powerpc/pseries: Read of-config partition via pstore
>>        powerpc/pseries: Read common partition via pstore
>>
>>
>>   arch/powerpc/platforms/pseries/nvram.c |  353 +++++++++++++++++++++++++++-----
>>   fs/pstore/inode.c                      |    9 +
>>   include/linux/pstore.h                 |    4
>>   3 files changed, 313 insertions(+), 53 deletions(-)
> This series looks good! Other than the naming conventions (are these
> new pstore types really PPC-only?) I think it's a fine addition.
>
> Thanks!

The new pstore types are PPC specific. Hence it would be better to have the
(_PPC) in the type ids so that other does not end up using these ids.

> -Kees
> --
> Kees Cook
> Chrome OS Security