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From:   "Rafael J. Wysocki" <rafael@kernel.org>
Date:   Fri, 19 Jun 2020 17:55:19 +0200
Message-ID: <CAJZ5v0isZCK8o6hopUV3SP25P5+BwZGSSRFtGQrunQ0n45t68g@mail.gmail.com>
Subject: Re: [PATCH v3] acpi: Extend TPM2 ACPI table with missing log fields
To:     Stefan Berger <stefanb@linux.ibm.com>,
        Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Cc:     "Rafael J. Wysocki" <rafael@kernel.org>,
        Stefan Berger <stefanb@linux.vnet.ibm.com>,
        "Rafael J. Wysocki" <rjw@rjwysocki.net>,
        linux-integrity@vger.kernel.org,
        ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        linux-security-module@vger.kernel.org
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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!