linux-kernel - Re: [Regression 4.15-rc2] New messages `tpm tpm0: A TPM error (2314) occurred continue selftest`

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Date:   Fri, 15 Dec 2017 16:38:09 +0100
From:   Paul Menzel <pmenzel@...gen.mpg.de>
To:     Mario Limonciello <mario.limonciello@...l.com>,
        Alexander Steffen <Alexander.Steffen@...ineon.com>,
        Jason Gunthorpe <jgg@...pe.ca>
Cc:     linux-integrity@...r.kernel.org, linux-kernel@...r.kernel.org,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Len Brown <len.brown@...el.com>,
        Thorsten Leemhuis <linux@...mhuis.info>
Subject: Re: [Regression 4.15-rc2] New messages `tpm tpm0: A TPM error (2314)
 occurred continue selftest`

Dear Mario,


On 12/15/17 16:24, Mario.Limonciello@...l.com wrote:
>> -----Original Message-----
>> From: Paul Menzel [mailto:pmenzel@...gen.mpg.de]
>> Sent: Friday, December 15, 2017 9:11 AM
>> To: Limonciello, Mario <Mario_Limonciello@...l.com>; Alexander Steffen
>> <Alexander.Steffen@...ineon.com>; Jason Gunthorpe <jgg@...pe.ca>
>> Cc: linux-integrity@...r.kernel.org; linux-kernel@...r.kernel.org;
>> rafael.j.wysocki@...el.com; len.brown@...el.com
>> Subject: Re: [Regression 4.15-rc2] New messages `tpm tpm0: A TPM error (2314)
>> occurred continue selftest`
>>
>> Dear Mario,
>>
>>
>> On 12/15/17 15:39, Mario.Limonciello@...l.com wrote:
>>>> -----Original Message-----
>>>> From: Paul Menzel [mailto:pmenzel@...gen.mpg.de]
>>>> Sent: Friday, December 15, 2017 5:54 AM
>>>> To: Limonciello, Mario <Mario_Limonciello@...l.com>; Alexander Steffen
>>>> <Alexander.Steffen@...ineon.com>; Jason Gunthorpe <jgg@...pe.ca>
>>>> Cc: linux-integrity@...r.kernel.org; linux-kernel@...r.kernel.org; Rafael J.
>>>> Wysocki <rafael.j.wysocki@...el.com>; Len Brown <len.brown@...el.com>
>>>> Subject: Re: [Regression 4.15-rc2] New messages `tpm tpm0: A TPM error (2314)
>>>> occurred continue selftest`

[…]

>>>> Mario, thank you for your quick reaction.
>>>>
>>>> […]
>>>>
>>>> 1.  Can you reproduce this issue too?
>>>
>>> I haven't seen this, but if this is a regression I also have not run anything
>>> later than 4.15-rc1 right now.
>>
>> Well as far as I understood it, it’s not a regression, and there is now
>> just better error reporting. Did you ever get the TPM to work?
> 
> I don't personally use a TPM with Linux on the XPS 9360, but TPM was
> tested by our partners when the XPS 9360 was enabled for Ubuntu.

It’d be great to know how it was tested, as currently it doesn’t work 
here. I included the output in my reply to Alexander just now.

>>>> 2.  How do I find out, what TPM firmware version is installed?
>>>
>>> fwupd will tell you.  Documentation (and code) here:
>>> https://github.com/hughsie/fwupd/tree/master/plugins/dell
>>
>> Unfortuntately it’s not listed with fwupd 0.7.0-0ubuntu4.3 in Ubuntu
>> 16.04.3 LTS installed by Dell.
> 
> If you're unwilling to upgrade to a newer userspace, you can write
> a simple application that can use the new dell-smbios from 4.15 interface to look this up.

Is the newer userspace officially supported by Dell. Because I really 
like to avoid the time-waste with the Dell support again, if I do not 
use their installed OS. Sometimes the Dell support even claims the 
installed Ubuntu flavor does not get any support by Dell.

> Most of the work is already done (see
> https://github.com/torvalds/linux/blob/master/tools/wmi/dell-smbios-example.c#L179)
> 
> You'll just need to add some parsing around the output (see fwupd code) to
> tell the version.  If you do this, please feel free to submit it platform-x86, it may be useful
> for someone else in this sample application too.
> 
> Given you don't have a newer fwupd on your system you won't be able to "easily" flash
> the newer TPM firmware.

I assume you don’t make these decisions, but please relay to your 
superiors that working functionality in the recommended/shipped OS is 
really what customers expect buying a device with GNU/Linux support. In 
my opinion, Dell and Canonical really need to step up there.


Kind regards,

Paul


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