From 60e10f896dbf6d78f912e4972081bd4119131376 Mon Sep 17 00:00:00 2001
From: Huang Rui <ray.huang@amd.com>
Date: Fri, 24 Dec 2021 09:05:03 +0800
Subject: 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>
---
 drivers/cpufreq/amd-pstate.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'drivers/cpufreq/amd-pstate.c')

diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c
index cc62f7484007..63efd5de98a2 100644
--- a/drivers/cpufreq/amd-pstate.c
+++ b/drivers/cpufreq/amd-pstate.c
@@ -44,6 +44,7 @@
 #include <asm/processor.h>
 #include <asm/cpufeature.h>
 #include <asm/cpu_device_id.h>
+#include "amd-pstate-trace.h"
 
 #define AMD_PSTATE_TRANSITION_LATENCY	0x20000
 #define AMD_PSTATE_TRANSITION_DELAY	500
@@ -220,6 +221,9 @@ static void amd_pstate_update(struct amd_cpudata *cpudata, u32 min_perf,
 	value &= ~AMD_CPPC_MAX_PERF(~0L);
 	value |= AMD_CPPC_MAX_PERF(max_perf);
 
+	trace_amd_pstate_perf(min_perf, des_perf, max_perf,
+			      cpudata->cpu, (value != prev), fast_switch);
+
 	if (value == prev)
 		return;
 
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