powerpc: Make function that parses RTAS error logs global
The IO event interrupt code has a function that finds specific
sections in an RTAS error log. We want to use it in the EPOW
code so make it global.
Rename things to make it less cryptic:
find_xelog_section() -> get_pseries_errorlog()
struct pseries_elog_section -> struct pseries_errorlog
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c
index 9f843cd..4d1a7ba 100644
--- a/arch/powerpc/kernel/rtas.c
+++ b/arch/powerpc/kernel/rtas.c
@@ -868,6 +868,40 @@
}
#endif
+/**
+ * Find a specific pseries error log in an RTAS extended event log.
+ * @log: RTAS error/event log
+ * @section_id: two character section identifier
+ *
+ * Returns a pointer to the specified errorlog or NULL if not found.
+ */
+struct pseries_errorlog *get_pseries_errorlog(struct rtas_error_log *log,
+ uint16_t section_id)
+{
+ struct rtas_ext_event_log_v6 *ext_log =
+ (struct rtas_ext_event_log_v6 *)log->buffer;
+ struct pseries_errorlog *sect;
+ unsigned char *p, *log_end;
+
+ /* Check that we understand the format */
+ if (log->extended_log_length < sizeof(struct rtas_ext_event_log_v6) ||
+ ext_log->log_format != RTAS_V6EXT_LOG_FORMAT_EVENT_LOG ||
+ ext_log->company_id != RTAS_V6EXT_COMPANY_ID_IBM)
+ return NULL;
+
+ log_end = log->buffer + log->extended_log_length;
+ p = ext_log->vendor_log;
+
+ while (p < log_end) {
+ sect = (struct pseries_errorlog *)p;
+ if (sect->id == section_id)
+ return sect;
+ p += sect->length;
+ }
+
+ return NULL;
+}
+
asmlinkage int ppc_rtas(struct rtas_args __user *uargs)
{
struct rtas_args args;
