Re: [Qemu-devel] [PATCH v3 3/4] acpi: build TPM Physical Presence interface

[Marc-André Lureau]

Hi

On Thu, Jun 21, 2018 at 3:21 PM, Marc-André Lureau
<address@hidden> wrote:

>>> +    method = aml_method("TPFN", 1, AML_SERIALIZED);
>> not quite sure how this method (supposed to ) work(s),
>> it could use nice comment explaining mechanics.
>>
>
> Windows doesn't like DerefOf (FUNC [N]), it returned wrong values. It
> took me a while to figure this out. My laptop TPM ACPI table uses the
> same trick, so I assume this is a Windows acpi bug/limitation. Instead
> we use a function that returns the corresponding field.

Sorry, I am wrong, my laptop doesn't use such table. I don't know
where I saw someone using the same trick though..


-- 
Marc-André Lureau