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 <ar...@linux.vnet.ibm.com>
Reviewed-by: Jim Keniston <jkeni...@us.ibm.com>
---
arch/powerpc/platforms/pseries/nvram.c | 17 ++++++++++++++++-
fs/pstore/inode.c | 3 +++
include/linux/pstore.h | 1 +
3 files changed, 20 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/platforms/pseries/nvram.c
b/arch/powerpc/platforms/pseries/nvram.c
index f7392f6..14cc486 100644
--- a/arch/powerpc/platforms/pseries/nvram.c
+++ b/arch/powerpc/platforms/pseries/nvram.c
@@ -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;
}
diff --git a/fs/pstore/inode.c b/fs/pstore/inode.c
index 73148ae..08c3d76 100644
--- a/fs/pstore/inode.c
+++ b/fs/pstore/inode.c
@@ -330,6 +330,9 @@ int pstore_mkfile(enum pstore_type_id type, char *psname,
u64 id, int count,
case PSTORE_TYPE_PPC_OF:
sprintf(name, "powerpc-ofw-%s-%lld", psname, id);
break;
+ case PSTORE_TYPE_PPC_COMMON:
+ sprintf(name, "powerpc-common-%s-%lld", psname, id);
+ break;
case PSTORE_TYPE_UNKNOWN:
sprintf(name, "unknown-%s-%lld", psname, id);
break;
diff --git a/include/linux/pstore.h b/include/linux/pstore.h
index 615dc18..656699f 100644
--- a/include/linux/pstore.h
+++ b/include/linux/pstore.h
@@ -38,6 +38,7 @@ enum pstore_type_id {
/* PPC64 partition types */
PSTORE_TYPE_PPC_RTAS = 4,
PSTORE_TYPE_PPC_OF = 5,
+ PSTORE_TYPE_PPC_COMMON = 6,
PSTORE_TYPE_UNKNOWN = 255
};
--
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