From: Tony Luck <tony.luck@xxxxxxxxx>
Add tracing support which may be useful for debugging systems that fail to complete
In Field Scan tests.
Signed-off-by: Tony Luck <tony.luck@xxxxxxxxx>
Signed-off-by: Jithu Joseph <jithu.joseph@xxxxxxxxx>
---
drivers/platform/x86/intel/ifs/runtest.c | 5 ++++
include/trace/events/intel_ifs.h | 38 ++++++++++++++++++++++++
2 files changed, 43 insertions(+)
create mode 100644 include/trace/events/intel_ifs.h
diff --git a/drivers/platform/x86/intel/ifs/runtest.c b/drivers/platform/x86/intel/ifs/runtest.c
index f9c98d84183f..b9fac2ac7107 100644
--- a/drivers/platform/x86/intel/ifs/runtest.c
+++ b/drivers/platform/x86/intel/ifs/runtest.c
@@ -10,6 +10,9 @@
#include "ifs.h"
+#define CREATE_TRACE_POINTS
+#include <trace/events/intel_ifs.h>
+
bool ifs_disabled;
static int ifs_retry_set(const char *val, const struct kernel_param *kp);
@@ -204,6 +207,8 @@ static void ifs_work_func(struct work_struct *work)
rdmsrl(MSR_SCAN_STATUS, status.data);
+ trace_ifs_status(activate, status);
+
/* Some cases can be retried, give up for others */
if (!can_restart(status))
break;
diff --git a/include/trace/events/intel_ifs.h b/include/trace/events/intel_ifs.h
new file mode 100644
index 000000000000..0611f370cb37
--- /dev/null
+++ b/include/trace/events/intel_ifs.h
@@ -0,0 +1,38 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM intel_ifs
+
+#if !defined(_TRACE_IFS_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_IFS_H
+
+#include <linux/ktime.h>
+#include <linux/tracepoint.h>
+
+TRACE_EVENT(ifs_status,
+
+ TP_PROTO(union ifs_scan activate, union ifs_status status),
+
+ TP_ARGS(activate, status),
+
+ TP_STRUCT__entry(
+ __field( u64, status )
+ __field( u8, start )
+ __field( u8, stop )
+ ),
+
+ TP_fast_assign(
+ __entry->start = activate.start;
+ __entry->stop = activate.stop;
+ __entry->status = status.data;
+ ),
+
+ TP_printk("start: %.2x, stop: %.2x, status: %llx",
+ __entry->start,
+ __entry->stop,
+ __entry->status)
+);
+
+#endif /* _TRACE_IFS_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>
--
2.17.1
