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powerpc/pseries: Read common partition via pstore

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This patch exploits pstore subsystem to read details of common partition
in NVRAM to a separate file in /dev/pstore. For instance, common partition
details will be stored in a file named [common-nvram-6].

Signed-off-by: Aruna Balakrishnaiah <aruna@linux.vnet.ibm.com>
Reviewed-by: Jim Keniston <jkenisto@us.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Aruna Balakrishnaiah
2013-06-06 00:22:20 +05:30
committed by Benjamin Herrenschmidt
parent f33f748c96
commit a5e4797b0f
3 changed files with 20 additions and 1 deletions
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17
arch/powerpc/platforms/pseries/nvram.c
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@@ -138,10 +138,17 @@ static struct nvram_os_partition of_config_partition = {
.os_partition = false
};
static struct nvram_os_partition common_partition = {
.name = "common",
.index = -1,
.os_partition = false
};
static enum pstore_type_id nvram_type_ids[] = {
PSTORE_TYPE_DMESG,
PSTORE_TYPE_PPC_RTAS,
PSTORE_TYPE_PPC_OF,
PSTORE_TYPE_PPC_COMMON,
-1
};
static int read_type;
@@ -530,7 +537,7 @@ static int nvram_pstore_write(enum pstore_type_id type,
}
/*
* Reads the oops/panic report, rtas and of-config partition.
* Reads the oops/panic report, rtas, of-config and common partition.
* Returns the length of the data we read from each partition.
* Returns 0 if we've been called before.
*/
@@ -566,6 +573,14 @@ static ssize_t nvram_pstore_read(u64 *id, enum pstore_type_id *type,
time->tv_sec = 0;
time->tv_nsec = 0;
break;
case PSTORE_TYPE_PPC_COMMON:
sig = NVRAM_SIG_SYS;
part = &common_partition;
*type = PSTORE_TYPE_PPC_COMMON;
*id = PSTORE_TYPE_PPC_COMMON;
time->tv_sec = 0;
time->tv_nsec = 0;
break;
default:
return 0;
}