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| author | Aruna Balakrishnaiah <aruna@linux.vnet.ibm.com> | 2013-06-06 00:21:44 +0530 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2013-06-20 17:04:52 +1000 |
| commit | 69020eea973d95766e905ee0ce7773e0027377a3 (patch) | |
| tree | a95233fbe6e307ceb991722a72188428210f9067 | |
| parent | d7563c94f728d8c9228cfddbb044c843b2e243e8 (diff) | |
| download | linux-69020eea973d95766e905ee0ce7773e0027377a3.tar.gz linux-69020eea973d95766e905ee0ce7773e0027377a3.tar.xz | |
powerpc/pseries: Read rtas partition via pstore
This patch set exploits the pstore subsystem to read details of rtas partition
in NVRAM to a separate file in /dev/pstore. For instance, rtas details will be
stored in a file named [rtas-nvram-4].
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>
| -rw-r--r-- | arch/powerpc/platforms/pseries/nvram.c | 33 | ||||
| -rw-r--r-- | fs/pstore/inode.c | 3 | ||||
| -rw-r--r-- | include/linux/pstore.h | 2 |
3 files changed, 31 insertions, 7 deletions
diff --git a/arch/powerpc/platforms/pseries/nvram.c b/arch/powerpc/platforms/pseries/nvram.c index 9edec8ee02ef..78d72f0175ad 100644 --- a/arch/powerpc/platforms/pseries/nvram.c +++ b/arch/powerpc/platforms/pseries/nvram.c @@ -131,9 +131,11 @@ static struct z_stream_s stream; #ifdef CONFIG_PSTORE static enum pstore_type_id nvram_type_ids[] = { PSTORE_TYPE_DMESG, + PSTORE_TYPE_PPC_RTAS, -1 }; static int read_type; +static unsigned long last_rtas_event; #endif static ssize_t pSeries_nvram_read(char *buf, size_t count, loff_t *index) @@ -297,8 +299,13 @@ int nvram_write_error_log(char * buff, int length, { int rc = nvram_write_os_partition(&rtas_log_partition, buff, length, err_type, error_log_cnt); - if (!rc) + if (!rc) { last_unread_rtas_event = get_seconds(); +#ifdef CONFIG_PSTORE + last_rtas_event = get_seconds(); +#endif + } + return rc; } @@ -506,7 +513,7 @@ static int nvram_pstore_write(enum pstore_type_id type, } /* - * Reads the oops/panic report. + * Reads the oops/panic report and ibm,rtas-log partition. * Returns the length of the data we read from each partition. * Returns 0 if we've been called before. */ @@ -526,6 +533,12 @@ static ssize_t nvram_pstore_read(u64 *id, enum pstore_type_id *type, part = &oops_log_partition; *type = PSTORE_TYPE_DMESG; break; + case PSTORE_TYPE_PPC_RTAS: + part = &rtas_log_partition; + *type = PSTORE_TYPE_PPC_RTAS; + time->tv_sec = last_rtas_event; + time->tv_nsec = 0; + break; default: return 0; } @@ -542,11 +555,17 @@ static ssize_t nvram_pstore_read(u64 *id, enum pstore_type_id *type, *count = 0; *id = id_no; - oops_hdr = (struct oops_log_info *)buff; - *buf = buff + sizeof(*oops_hdr); - time->tv_sec = oops_hdr->timestamp; - time->tv_nsec = 0; - return oops_hdr->report_length; + + if (nvram_type_ids[read_type] == PSTORE_TYPE_DMESG) { + oops_hdr = (struct oops_log_info *)buff; + *buf = buff + sizeof(*oops_hdr); + time->tv_sec = oops_hdr->timestamp; + time->tv_nsec = 0; + return oops_hdr->report_length; + } + + *buf = buff; + return part->size; } static struct pstore_info nvram_pstore_info = { diff --git a/fs/pstore/inode.c b/fs/pstore/inode.c index e4bcb2cf055a..ec24f9ceb5ed 100644 --- a/fs/pstore/inode.c +++ b/fs/pstore/inode.c @@ -324,6 +324,9 @@ int pstore_mkfile(enum pstore_type_id type, char *psname, u64 id, int count, case PSTORE_TYPE_MCE: sprintf(name, "mce-%s-%lld", psname, id); break; + case PSTORE_TYPE_PPC_RTAS: + sprintf(name, "rtas-%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 75d01760c911..d7a8fe938c0f 100644 --- a/include/linux/pstore.h +++ b/include/linux/pstore.h @@ -35,6 +35,8 @@ enum pstore_type_id { PSTORE_TYPE_MCE = 1, PSTORE_TYPE_CONSOLE = 2, PSTORE_TYPE_FTRACE = 3, + /* PPC64 partition types */ + PSTORE_TYPE_PPC_RTAS = 4, PSTORE_TYPE_UNKNOWN = 255 }; |