Re: [PATCH for-4.22 v2] acpi: Set TPM2 LAML to actual log area size

[Jan Beulich <jbeulich@suse.com>]

On 06.11.2025 13:13, Tu Dinh wrote:
> On 06/11/2025 13:10, Jan Beulich wrote:
>> On 05.11.2025 01:03, Tu Dinh wrote:
>>> The LAML field should follow the TCG PFP specification:
>>>
>>> The TCG ACPI specification uses the field name "Log Area Minimum
>>> Length", but the field value is the actual log area length reserved by
>>> Platform Firmware, not a lower bound.
>>
>> And this is said where? Even the field description (ACPI 6.5) reads "Identifies
>> the minimum length (in bytes) of the system’s preboot CC event log area." (I
>> agree it makes little sense that way, but the change still needs proper
>> explanation.)
> 
> The above is an exact quote from the "TCG PC Client Platform Firmware 
> Profile Specification Version 1.06 Revision 52".

Interesting. It didn't become clear to me that this actually is a quotation.
Perhaps:

The LAML field should follow the TCG PC Client Platform Firmware Profile
Specification Version. Version 1.06 Revision 52 says:

'The TCG ACPI specification uses the field name "Log Area Minimum
 Length", but the field value is the actual log area length reserved by
 Platform Firmware, not a lower bound.'

Remove the now-unused TPM_LOG_AREA_MINIMUM_SIZE.

? Then
Acked-by: Jan Beulich <jbeulich@suse.com>
and I could make the adjustment while committing (after 4.21 was branched off,
of course).

Jan