hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

powerpc/pseries: Read common partition via pstore 

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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
arch/powerpc/platforms/pseries/nvram.c
View File

@ -138,10 +138,17 @@ static struct nvram_os_partition of_config_partition = {
.os_partition = false .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[] = { static enum pstore_type_id nvram_type_ids[] = {
PSTORE_TYPE_DMESG, PSTORE_TYPE_DMESG,
PSTORE_TYPE_PPC_RTAS, PSTORE_TYPE_PPC_RTAS,
PSTORE_TYPE_PPC_OF, PSTORE_TYPE_PPC_OF,
PSTORE_TYPE_PPC_COMMON,
-1 -1
}; };
static int read_type; 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 the length of the data we read from each partition.
* Returns 0 if we've been called before. * 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_sec = 0;
time->tv_nsec = 0; time->tv_nsec = 0;
break; 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: default:
return 0; return 0;
} }

3
fs/pstore/inode.c
View File

@ -330,6 +330,9 @@ int pstore_mkfile(enum pstore_type_id type, char *psname, u64 id, int count,
case PSTORE_TYPE_PPC_OF: case PSTORE_TYPE_PPC_OF:
sprintf(name, "powerpc-ofw-%s-%lld", psname, id); sprintf(name, "powerpc-ofw-%s-%lld", psname, id);
break; break;
case PSTORE_TYPE_PPC_COMMON:
sprintf(name, "powerpc-common-%s-%lld", psname, id);
break;
case PSTORE_TYPE_UNKNOWN: case PSTORE_TYPE_UNKNOWN:
sprintf(name, "unknown-%s-%lld", psname, id); sprintf(name, "unknown-%s-%lld", psname, id);
break; break;

1
include/linux/pstore.h
View File

@ -38,6 +38,7 @@ enum pstore_type_id {
/* PPC64 partition types */ /* PPC64 partition types */
PSTORE_TYPE_PPC_RTAS = 4, PSTORE_TYPE_PPC_RTAS = 4,
PSTORE_TYPE_PPC_OF = 5, PSTORE_TYPE_PPC_OF = 5,
PSTORE_TYPE_PPC_COMMON = 6,
PSTORE_TYPE_UNKNOWN = 255 PSTORE_TYPE_UNKNOWN = 255
}; };