From db929b878b26a0ebc8a8b2e74be9e6bcf87a8b2e Mon Sep 17 00:00:00 2001
From: Bin Lu <bin.lu@arm.com>
Date: Tue, 10 Apr 2018 14:07:09 +0800
Subject: [PATCH] Skip pstate detection on Arm

Signed-off-by: Bin Lu <bin.lu@arm.com>
---
 source/pstate/pstate.go | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/source/pstate/pstate.go b/source/pstate/pstate.go
index 5e7de7095..bc5c69a9a 100644
--- a/source/pstate/pstate.go
+++ b/source/pstate/pstate.go
@@ -19,6 +19,7 @@ package pstate
 import (
 	"fmt"
 	"io/ioutil"
+	"runtime"
 )
 
 // Source implements FeatureSource.
@@ -31,6 +32,13 @@ func (s Source) Name() string { return "pstate" }
 func (s Source) Discover() ([]string, error) {
 	features := []string{}
 
+	// On Arm platform, the frequency boost mechanism is software-based.
+	// So skip pstate detection on Arm.
+	switch runtime.GOARCH {
+	case "arm64":
+		return features, nil
+	}
+
 	// Only looking for turbo boost for now...
 	bytes, err := ioutil.ReadFile("/sys/devices/system/cpu/intel_pstate/no_turbo")
 	if err != nil {