Re: [PATCH v2 3/3] hwmon: (coretemp) Extend the bitmask to read temperature to 0xff

[Guenter Roeck]

On Thu, Apr 25, 2024 at 10:13:11AM -0700, Ricardo Neri wrote:
> The Intel Software Development manual defines the temperature digital
> readout as the bits [22:16] of the IA32_[PACKAGE]_THERM_STATUS registers.
> Bit 23 is specified as reserved.
> 
> In recent processors, however, the temperature digital readout uses bits
> [23:16]. In those processors, using the bitmask 0x7f would lead to
> incorrect readings if the temperature deviates from TjMax by more than
> 127 degrees Celsius.
> 
> Although not guaranteed, bit 23 is likely to be 0 in processors from a few
> generations ago. The temperature reading would still be correct in those
> processors when using a 0xff bitmask.
> 
> Model-specific provisions can be made for older processors in which bit 23
> is not 0 should the need arise.
> 
> Signed-off-by: Ricardo Neri <ricardo.neri-calderon@xxxxxxxxxxxxxxx>

Applied.

Thanks,
Guenter