Re: [PATCH] libacpi: Widen TPM detection

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 11/06/2020 04:55, Jason Andryuk wrote:
> The hardcoded tpm_signature is too restrictive to detect many TPMs.  For
> instance, it doesn't accept a QEMU emulated TPM (VID 0x1014 DID 0x0001).
> Make the TPM detection match that in rombios which accepts a wider
> range.
>
> With this change, the TPM's TCPA ACPI table is generated and the guest
> OS can automatically load the tpm_tis driver.  It also allows seabios to
> detect and use the TPM.  However, seabios skips some TPM initialization
> when running under Xen, so it will not populate any PCRs unless modified
> to run the initialization under Xen.
>
> Signed-off-by: Jason Andryuk <jandryuk@xxxxxxxxx>

Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

This looks like it wants backporting, so CC'ing Paul for a 4.14 release ack.