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: <20170407201347.2qcyrdzgg2yikoen@intel.com>
Date:   Fri, 7 Apr 2017 23:13:47 +0300
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Jason Gunthorpe <jgunthorpe@...idianresearch.com>
Cc:     Paul Menzel <pmenzel@...gen.mpg.de>,
        "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 01:10:13PM -0600, Jason Gunthorpe wrote:
> 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

I'll come back to this. I have to re-read the whole mail thread to
get back into the context. Lots of multitasking because of release
and so forth. Sorry for the latency!

/Jarkko