From a5e4797b0f46819a74a7233825137ed5d2f51b51 Mon Sep 17 00:00:00 2001 From: Aruna Balakrishnaiah Date: Thu, 6 Jun 2013 00:22:20 +0530 Subject: 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 Reviewed-by: Jim Keniston Signed-off-by: Benjamin Herrenschmidt 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 }; -- cgit v0.10.2