cpufreq: amd-pstate: Add trace for AMD P-State module
Add trace event to monitor the performance value changes which is
controlled by cpu governors.
Signed-off-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
diff --git a/drivers/cpufreq/amd-pstate-trace.h b/drivers/cpufreq/amd-pstate-trace.h
new file mode 100644
index 0000000..6475059
--- /dev/null
+++ b/drivers/cpufreq/amd-pstate-trace.h
@@ -0,0 +1,77 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * amd-pstate-trace.h - AMD Processor P-state Frequency Driver Tracer
+ *
+ * Copyright (C) 2021 Advanced Micro Devices, Inc. All Rights Reserved.
+ *
+ * Author: Huang Rui <ray.huang@amd.com>
+ */
+
+#if !defined(_AMD_PSTATE_TRACE_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _AMD_PSTATE_TRACE_H
+
+#include <linux/cpufreq.h>
+#include <linux/tracepoint.h>
+#include <linux/trace_events.h>
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM amd_cpu
+
+#undef TRACE_INCLUDE_FILE
+#define TRACE_INCLUDE_FILE amd-pstate-trace
+
+#define TPS(x) tracepoint_string(x)
+
+TRACE_EVENT(amd_pstate_perf,
+
+ TP_PROTO(unsigned long min_perf,
+ unsigned long target_perf,
+ unsigned long capacity,
+ unsigned int cpu_id,
+ bool changed,
+ bool fast_switch
+ ),
+
+ TP_ARGS(min_perf,
+ target_perf,
+ capacity,
+ cpu_id,
+ changed,
+ fast_switch
+ ),
+
+ TP_STRUCT__entry(
+ __field(unsigned long, min_perf)
+ __field(unsigned long, target_perf)
+ __field(unsigned long, capacity)
+ __field(unsigned int, cpu_id)
+ __field(bool, changed)
+ __field(bool, fast_switch)
+ ),
+
+ TP_fast_assign(
+ __entry->min_perf = min_perf;
+ __entry->target_perf = target_perf;
+ __entry->capacity = capacity;
+ __entry->cpu_id = cpu_id;
+ __entry->changed = changed;
+ __entry->fast_switch = fast_switch;
+ ),
+
+ TP_printk("amd_min_perf=%lu amd_des_perf=%lu amd_max_perf=%lu cpu_id=%u changed=%s fast_switch=%s",
+ (unsigned long)__entry->min_perf,
+ (unsigned long)__entry->target_perf,
+ (unsigned long)__entry->capacity,
+ (unsigned int)__entry->cpu_id,
+ (__entry->changed) ? "true" : "false",
+ (__entry->fast_switch) ? "true" : "false"
+ )
+);
+
+#endif /* _AMD_PSTATE_TRACE_H */
+
+/* This part must be outside protection */
+#undef TRACE_INCLUDE_PATH
+#define TRACE_INCLUDE_PATH .
+
+#include <trace/define_trace.h>