From 73e8ae4fbd1beb1b310719717f419fcc1ab979a5 Mon Sep 17 00:00:00 2001
From: erpalma <palmarini@unive.it>
Date: Mon, 2 Apr 2018 14:51:06 +0200
Subject: [PATCH] initial push

---
 Makefile           |  7 +++++++
 lenovo_fix.py      | 38 ++++++++++++++++++++++++++++++++++++++
 lenovo_fix.service |  9 +++++++++
 3 files changed, 54 insertions(+)
 create mode 100644 Makefile
 create mode 100755 lenovo_fix.py
 create mode 100644 lenovo_fix.service

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..f9fb979
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,7 @@
+all: install
+
+install:
+	install -d /usr/local/sbin/
+	install -m 700 lenovo_fix.py /usr/local/sbin/
+	install -d /etc/systemd/system/
+	install -m 644 lenovo_fix.service /etc/systemd/system/
\ No newline at end of file
diff --git a/lenovo_fix.py b/lenovo_fix.py
new file mode 100755
index 0000000..e3aee04
--- /dev/null
+++ b/lenovo_fix.py
@@ -0,0 +1,38 @@
+#!/usr/bin/env python2
+
+import glob
+import os
+import struct
+
+from periphery import MMIO
+from time import sleep
+
+UPDATE_RATE_SEC = 15
+
+
+def writemsr(msr, val):
+    n = glob.glob('/dev/cpu/[0-9]*/msr')
+    for c in n:
+        f = os.open(c, os.O_WRONLY)
+        os.lseek(f, msr, os.SEEK_SET)
+        os.write(f, struct.pack('Q', val))
+        os.close(f)
+    if not n:
+        raise OSError("msr module not loaded (run modprobe msr)")
+
+
+def main():
+    mchbar_mmio = MMIO(0xfed159a0, 8)
+    while True:
+        # set temperature trip point to 97 C
+        writemsr(0x1a2, 0x3000000)
+        # set MSR to PL1 45W, max duration - PL2 45W, 2ms
+        writemsr(0x610, 0x42816800fe8168)
+        # set MCHBAR register to the same PL1/2 values
+        mchbar_mmio.write32(0, 0x00fe8168)
+        mchbar_mmio.write32(4, 0x00428168)
+        sleep(UPDATE_RATE_SEC)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/lenovo_fix.service b/lenovo_fix.service
new file mode 100644
index 0000000..0735e88
--- /dev/null
+++ b/lenovo_fix.service
@@ -0,0 +1,9 @@
+[Unit]
+Description=Fix Lenovo T480/T480s/X1C6 throttling on Linux
+
+[Service]
+Type=simple
+ExecStart=/usr/local/sbin/lenovo_fix.py
+
+[Install]
+WantedBy=multi-user.target
\ No newline at end of file