From: Paul Menzel <pmenzel-KUpvgZVWgV9o1qOY/usvUg@public.gmane.org>
To: Jason Gunthorpe
<jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
Cc: tpmdd-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org,
Linux Kernel Mailing List
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Denis 'GNUtoo' Carikli
<GNUtoo-n+LsquliYkMdnm+yROfE0A@public.gmane.org>
Subject: Re: Regression between Linux 3.16 and 4.8/4.9 on Lenovo X60 with coreboot
Date: Tue, 04 Apr 2017 19:44:24 +0200 [thread overview]
Message-ID: <6cd95003c558c2d5aac6eaaa5cd3e86e@molgen.mpg.de> (raw)
In-Reply-To: <20170404171533.GA3255-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
Dear Jason,
Thank you for your reply.
On 2017-04-04 19:15, Jason Gunthorpe wrote:
> On Tue, Apr 04, 2017 at 06:29:06PM +0200, Paul Menzel wrote:
>
>> Unfortunately, there seems to have been a regression between Linux
>> 3.16
>> and 4.8 and 4.9, so that the Linux kernel doesn’t create the TPM
>> device.
>
> That old kernel did not check error codes when reading burst count,
> the new one does. It is quite possible the older kernel is failing to
> read burst count and subtly malfunctioning.
GNUtoo got the messages below. Unfortunately, I don’t know, what Linux
Kernel that is.
```
tpm_tis 00:07: 1.2 TPM (device-id 0x3202, rev-id 5)
tpm tpm0: A TPM error (38) occurred attempting to determine the timeouts
tpm tpm0: Issuing TPM_STARTUP
tpm tpm0: [Hardware Error]: Adjusting reported timeouts: A
10000->10000us B 10000->10000us C 0->750000us D 0->750000us
```
> It would be helpful if you could prove/disprove this statement by
> adding some debugging to 3.16.
Could you please help me with that? Can I enable certain options to get
more debugging information?
> As to why the burst count cannot be read.. I don't know, check if
> increasing the retries helps, it could be this particular TPM is out
> of spec for the cold startup process.
How can I increase the retry count?
>> Remove module and run `sudo modprobe tpm_tis itpm=1 force=1`.
>
> Is this really an 'itpm'? It doesn't look like it..
Sorry, I don’t know. Leaving that out, gives the same messages though.
```
tpm tpm0: Unable to read burstcount
tpm tpm0: tpm_transmit: tpm_send: error -16
tpm_tis tpm_tis: Could not get TPM timeouts and durations
```
Kind regards,
Paul Menzel
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next prev parent reply other threads:[~2017-04-04 17:44 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-04 16:29 Regression between Linux 3.16 and 4.8/4.9 on Lenovo X60 with coreboot Paul Menzel
[not found] ` <31e0ed69-174b-93ce-abf2-66cf08b1594e-KUpvgZVWgV9o1qOY/usvUg@public.gmane.org>
2017-04-04 17:15 ` Jason Gunthorpe
[not found] ` <20170404171533.GA3255-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2017-04-04 17:44 ` Paul Menzel [this message]
-- strict thread matches above, loose matches on Subject: below --
2017-04-05 11:03 Maciej S. Szmigiero
[not found] ` <c4bfd77e-3fb9-8a9b-28f5-48e6c13beb12-APzI5cXaD1zVlRWJc41N0YvC60bnQu0Y@public.gmane.org>
2017-04-05 13:36 ` Jarkko Sakkinen
2017-04-06 6:18 ` Paul Menzel
[not found] ` <bf4ca184f43cc7b6ee8069b63558087c-KUpvgZVWgV9o1qOY/usvUg@public.gmane.org>
2017-04-06 11:52 ` Maciej S. Szmigiero
2017-04-06 16:55 ` Jason Gunthorpe
[not found] ` <20170406165557.GD7657-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2017-04-06 18:26 ` Paul Menzel
[not found] ` <3d62bd7d4addc020c2f8e3c2edf3280e-KUpvgZVWgV9o1qOY/usvUg@public.gmane.org>
2017-04-06 19:10 ` Jason Gunthorpe
[not found] ` <20170406191013.GA25011-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>
2017-04-07 20:13 ` Jarkko Sakkinen
[not found] ` <20170407201347.2qcyrdzgg2yikoen-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2017-04-07 20:58 ` Paul Menzel
2017-04-06 18:58 ` Jarkko Sakkinen
2017-04-08 10:40 ` [tpmdd-devel] " Denis 'GNUtoo' Carikli
[not found] ` <20170408123651.76f18ba4-r3nPC/fXJJgy06l1zSILBM/Rnsmy/zvw/z7RTEddyNg@public.gmane.org>
2017-04-08 20:25 ` Jason Gunthorpe
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