linux-kernel - RE: [PATCH] acpi: update struct acpi_table

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Date:	Tue, 9 Jun 2015 16:16:14 +0000
From:	"Moore, Robert" <robert.moore@...el.com>
To:	Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
CC:	"Zheng, Lv" <lv.zheng@...el.com>,
	"Wysocki, Rafael J" <rafael.j.wysocki@...el.com>,
	Len Brown <lenb@...nel.org>,
	"open list:ACPI COMPONENT AR..." <linux-acpi@...r.kernel.org>,
	"open list:ACPI COMPONENT AR..." <devel@...ica.org>,
	open list <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] acpi: update struct acpi_table_tpm2

Looking at the TCG ACPI Specification today, it looks like there are major changes to the TCPA table. There is a whole bunch of new stuff after the Log Area Start Address.

Perhaps I missed or didn't get part of your proposed change.


> -----Original Message-----
> From: Jarkko Sakkinen [mailto:jarkko.sakkinen@...ux.intel.com]
> Sent: Tuesday, June 09, 2015 8:19 AM
> To: Moore, Robert
> Cc: Zheng, Lv; Wysocki, Rafael J; Len Brown; open list:ACPI COMPONENT
> AR...; open list:ACPI COMPONENT AR...; open list
> Subject: Re: [PATCH] acpi: update struct acpi_table_tpm2
> 
> On Tue, Jun 09, 2015 at 02:21:12PM +0000, Moore, Robert wrote:
> > ACPICA usually defines any "related" data structures, just for user
> > convenience.
> 
> If you want to keep it, it's fine for me but we still probably use the
> internal structure for it in tpm_crb driver (as tpm_tis uses internal
> structure for CRB).
> 
> Do other updates look fine? I'm looking into migrating to tpm_crb driver
> to use actbl3.h.
> 
> /Jarkko
> 
> >
> > > -----Original Message-----
> > > From: Jarkko Sakkinen [mailto:jarkko.sakkinen@...ux.intel.com]
> > > Sent: Tuesday, June 09, 2015 2:18 AM
> > > To: Moore, Robert
> > > Cc: Zheng, Lv; Wysocki, Rafael J; Len Brown; open list:ACPI
> > > COMPONENT AR...; open list:ACPI COMPONENT AR...; open list
> > > Subject: Re: [PATCH] acpi: update struct acpi_table_tpm2
> > >
> > > On Mon, Jun 08, 2015 at 08:52:02PM +0000, Moore, Robert wrote:
> > > > It looks like there is a change to the TCPA table also.
> > >
> > > Right. I'll update that too.
> > >
> > > I strongly think that the struct acpi_tpm2_control should not be in
> > > actbl3.h. It is not defined in the TCG ACPI specification. It is
> > > defined in
> > >
> > > http://www.trustedcomputinggroup.org/resources/pc_client_platform_tp
> > > m_prof
> > > ile_ptp_specification
> > >
> > > FIFO control structures are internal for to the TPM subsystem and so
> > > should be CRB control structures (and we have already inside
> tpm_crb.c).
> > >
> > > The structure ended up there probably because it was combined with
> > > the
> > > TPM2 table in that Microsoft specification.
> > >
> > > /Jarkko
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