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Relaxed checks for /dev/mem access. Fix #136

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erpalma
2019-09-06 09:34:22 +02:00
parent f155eea88a
commit c89c12475a
1 changed files with 17 additions and 13 deletions
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30
lenovo_fix.py
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@@ -512,7 +512,9 @@ def power_thread(config, regs, exit_event):
try: try:
mchbar_mmio = MMIO(0xFED159A0, 8) mchbar_mmio = MMIO(0xFED159A0, 8)
except MMIOError: except MMIOError:
fatal('Unable to open /dev/mem. Try to disable Secure Boot.') warning('Unable to open /dev/mem. TDP override might not work correctly.')
warning('Try to disable Secure Boot and/or enable CONFIG_DEVMEM in kernel config.')
mchbar_mmio = None
next_hwp_write = 0 next_hwp_write = 0
while not exit_event.is_set(): while not exit_event.is_set():
@@ -564,17 +566,18 @@ def power_thread(config, regs, exit_event):
write_value, read_value, match write_value, read_value, match
) )
) )
# set MCHBAR register to the same PL1/2 values if mchbar_mmio is not None:
mchbar_mmio.write32(0, write_value & 0xFFFFFFFF) # set MCHBAR register to the same PL1/2 values
mchbar_mmio.write32(4, write_value >> 32) mchbar_mmio.write32(0, write_value & 0xFFFFFFFF)
if args.debug: mchbar_mmio.write32(4, write_value >> 32)
read_value = mchbar_mmio.read32(0) | (mchbar_mmio.read32(4) << 32) if args.debug:
match = OK if write_value == read_value else ERR read_value = mchbar_mmio.read32(0) | (mchbar_mmio.read32(4) << 32)
print( match = OK if write_value == read_value else ERR
'[D] MCHBAR PACKAGE_POWER_LIMIT - write {:#x} - read {:#x} - match {}'.format( print(
write_value, read_value, match '[D] MCHBAR PACKAGE_POWER_LIMIT - write {:#x} - read {:#x} - match {}'.format(
write_value, read_value, match
)
) )
)
wait_t = config.getfloat(power['source'], 'Update_Rate_s') wait_t = config.getfloat(power['source'], 'Update_Rate_s')
enable_hwp_mode = config.getboolean('AC', 'HWP_Mode', fallback=False) enable_hwp_mode = config.getboolean('AC', 'HWP_Mode', fallback=False)
@@ -613,9 +616,10 @@ def check_kernel():
pass pass
if kernel_config is None: if kernel_config is None:
print('[W] Unable to obtain and validate kernel config.') print('[W] Unable to obtain and validate kernel config.')
return
elif not re.search('CONFIG_DEVMEM=y', kernel_config): elif not re.search('CONFIG_DEVMEM=y', kernel_config):
fatal('Bad kernel config: you need CONFIG_DEVMEM=y.') warning('Bad kernel config: you need CONFIG_DEVMEM=y.')
elif not re.search('CONFIG_X86_MSR=(y|m)', kernel_config): if not re.search('CONFIG_X86_MSR=(y|m)', kernel_config):
fatal('Bad kernel config: you need CONFIG_X86_MSR builtin or as module.') fatal('Bad kernel config: you need CONFIG_X86_MSR builtin or as module.')