From 237894af81973e3285026738ce8d034b6324c085 Mon Sep 17 00:00:00 2001
From: "Jason A. Donenfeld" <Jason@zx2c4.com>
Date: Fri, 2 Feb 2018 17:04:16 +0100
Subject: Disable turbo via MSR

---
 run.sh | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/run.sh b/run.sh
index 77c6a4d..39c4719 100755
--- a/run.sh
+++ b/run.sh
@@ -10,7 +10,15 @@ nob_cpus() {
 
 noturbo() {
 	echo "[+] Setting no-turbo to status $1"
-	echo "$1" > /sys/devices/system/cpu/intel_pstate/no_turbo
+	if [[ -e /sys/devices/system/cpu/intel_pstate/no_turbo ]]; then
+		echo "$1" > /sys/devices/system/cpu/intel_pstate/no_turbo
+	else
+		local val
+		[[ $1 == 0 ]] && val=0x850089
+		[[ $1 == 1 ]] && val=0x4000850089
+		[[ -n $val ]] || return 0
+		wrmsr -a 0x1a0 $val
+	fi
 }
 
 [[ -e kbench9000.ko ]]
-- 
cgit v1.2.3-59-g8ed1b