initial push

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()