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show undervolt planes values in mV in debug

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This commit is contained in:
erpalma
2018-08-30 14:00:44 +02:00
parent a66d6b1edc
commit 23730180f0
1 changed files with 26 additions and 13 deletions
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39
lenovo_fix.py
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@@ -178,20 +178,10 @@ def calc_time_window_vars(t):
raise ValueError('Unable to find a good combination!')
def undervolt(config):
for plane in VOLTAGE_PLANES:
write_value = calc_undervolt_msr(plane, config.getfloat('UNDERVOLT', plane))
writemsr(0x150, write_value)
if args.debug:
write_value &= 0xFFFFFFFF
writemsr(0x150, 0x8000001000000000 | (VOLTAGE_PLANES[plane] << 40))
read_value = readmsr(0x150, flatten=True)
match = write_value == read_value
print('[D] Undervolt plane {:s} - write {:#x} - read {:#x} - match {}'.format(
plane, write_value, read_value, match))
def calc_undervolt_msr(plane, offset):
"""Return the value to be written in the MSR 150h for setting the given
offset voltage (in mV) to the given voltage plane.
"""
assert offset <= 0
assert plane in VOLTAGE_PLANES
offset = int(round(offset * 1.024))
@@ -199,6 +189,29 @@ def calc_undervolt_msr(plane, offset):
return 0x8000001100000000 | (VOLTAGE_PLANES[plane] << 40) | offset
def calc_undervolt_mv(msr_value):
"""Return the offset voltage (in mV) from the given raw MSR 150h value.
"""
offset = (msr_value & 0xFFE00000) >> 21
offset = offset if offset <= 0x400 else -(0x800 - offset)
return int(round(offset / 1.024))
def undervolt(config):
for plane in VOLTAGE_PLANES:
write_offset_mv = config.getfloat('UNDERVOLT', plane)
write_value = calc_undervolt_msr(plane, write_offset_mv)
writemsr(0x150, write_value)
if args.debug:
write_value &= 0xFFFFFFFF
writemsr(0x150, 0x8000001000000000 | (VOLTAGE_PLANES[plane] << 40))
read_value = readmsr(0x150, flatten=True)
read_offset_mv = calc_undervolt_mv(read_value)
match = write_value == read_value
print('[D] Undervolt plane {:s} - write {:.0f} mV ({:#x}) - read {:.0f} mV ({:#x}) - match {}'.format(
plane, write_offset_mv, write_value, read_offset_mv, read_value, match))
def load_config():
config = configparser.ConfigParser()
config.read(args.config)