linux-kernel - Re: [tpmdd-devel] Regression between Linux 3.16 and 4.8/4.9 on Lenovo X60 with coreboot

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Message-ID: <20170406191013.GA25011@obsidianresearch.com>
Date:   Thu, 6 Apr 2017 13:10:13 -0600
From:   Jason Gunthorpe <jgunthorpe@...idianresearch.com>
To:     Paul Menzel <pmenzel@...gen.mpg.de>
Cc:     "Maciej S. Szmigiero" <mail@...iej.szmigiero.name>,
        tpmdd-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org,
        GNUtoo@...log.org
Subject: Re: [tpmdd-devel] Regression between Linux 3.16 and 4.8/4.9 on
 Lenovo X60 with coreboot

On Thu, Apr 06, 2017 at 08:26:22PM +0200, Paul Menzel wrote:
> >We added direct ACPI binding to the driver in addition to PNP, so if
> >you have an ACPI table it goes down that path and does some additional
> >validation of what is in the TPM. The BIOS must provide a
> >acpi_dev_resource_memory and a ACPI_SIG_TPM2 for the ACPI entry at a
> >minimum.
> 
> Is it correct, that this is added in/for 4.11, so just recently? Testing
> with Linux 4.10.8, everything is detected just fine.

No, it is quite a bit older.. And it should only go for TPM2, which I
don't think you have??

Maybe Jarkko has a guess, but sure sounds like something is recently
broken in 4.11

Jason