Re: [PATCH v3] acpi: Extend TPM2 ACPI table with missing log fields

Jarkko Sakkinen
2020-06-23T00:57:27Z

On Fri, Jun 19, 2020 at 05:55:19PM +0200, Rafael J. Wysocki wrote:
> On Fri, Jun 19, 2020 at 5:14 PM Stefan Berger <stefanb@linux.ibm.com> wrote:
> >
> > On 4/2/20 3:21 PM, Jarkko Sakkinen wrote:
> > > On Wed, Apr 01, 2020 at 11:05:36AM +0200, Rafael J. Wysocki wrote:
> > >> On Wed, Apr 1, 2020 at 10:37 AM Jarkko Sakkinen
> > >> <jarkko.sakkinen@linux.intel.com> wrote:
> > >>> On Tue, Mar 31, 2020 at 05:49:49PM -0400, Stefan Berger wrote:
> > >>>> From: Stefan Berger <stefanb@linux.ibm.com>
> > >>>>
> > >>>> Recent extensions of the TPM2 ACPI table added 3 more fields
> > >>>> including 12 bytes of start method specific parameters and Log Area
> > >>>> Minimum Length (u32) and Log Area Start Address (u64). So, we extend
> > >>>> the existing structure with these fields to allow non-UEFI systems
> > >>>> to access the TPM2's log.
> > >>>>
> > >>>> The specification that has the new fields is the following:
> > >>>> TCG ACPI Specification
> > >>>> Family "1.2" and "2.0"
> > >>>> Version 1.2, Revision 8
> > >>>>
> > >>>> Adapt all existing table size calculations to use
> > >>>> offsetof(struct acpi_table_tpm2, start_method_specific)
> > >>>> [where start_method_specific is a newly added field]
> > >>>> rather than sizeof(struct acpi_table_tpm2) so that the addition
> > >>>> of the new fields does not affect current systems that may not
> > >>>> have them.
> > >>>>
> > >>>> Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
> > >>>> Cc: linux-acpi@vger.kernel.org
> > >>> I think I'm cool with this but needs an ack from ACPI maintainer.
> > >>>
> > >>> Rafael, given that this not an intrusive change in any possible means,
> > >>> can I pick this patch and put it to my next pull request?
> > >> Yes, please.
> > >>
> > >> Thanks!
> > > Great, thanks Rafael.
> > >
> > > Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
> > >
> > > Do you mind if I add your ack to the commit?
> >
>
> It looks like I missed the previous message from Jarkko.
>
> Yes, please, feel free to add my ACK to the patch, thanks!

OK, this is great, thanks. I'll pick it to my tree then.

/Jarkko