From: Hans de Goede <hdegoede@redhat.com>
To: Javier Martinez Canillas <javierm@redhat.com>,
Jeremy Cline <jeremy@jcline.org>,
Thiebaud Weksteen <tweek@google.com>,
Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>,
linux-efi@vger.kernel.org, linux-integrity@vger.kernel.org,
tpmdd-devel@lists.sourceforge.net,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Regression from efi: call get_event_log before ExitBootServices
Date: Thu, 8 Mar 2018 17:50:23 +0100 [thread overview]
Message-ID: <cec36124-0950-6ad9-58a8-9bd69e63aa04@redhat.com> (raw)
In-Reply-To: <a3b5f822-f8f4-e2f5-46da-e23e13174f28@redhat.com>
<somehow this part of the thread was missing some email addresses, I've added these now>
Hi,
On 07-03-18 12:34, Javier Martinez Canillas wrote:
> On 03/07/2018 12:10 PM, Hans de Goede wrote:
<snip>
>> Both according to the BIOS and to the /sys/class/tpm/tpm0/device/description
>> file it is a TPM 2.0.
>>
>
> I see, so you can choose enabling the TPM 1.2 or TPM 2.0 device? At least that's
> the case on my X1 Carbon laptop. I've both a hardware TPM 1.2 and a firmware TPM
> 2.0 that's implemented as an Intel ME application (AFAIU).
This device only has the firmware TPM 2.0 implementation.
<snip>
>> I'm actually amazed that this machine has a TPM at all, a quick internet
>> search shows that it is a software implemented TPM running as part of the
>> TXE firmware.
>>
>
> A quick search suggests that it comes with Windows 10?
Yes, it comes with Windows 10.
>>> For start, can you please check if you can boot a v4.16-rcX kernel with the
>>> TPM device enabled? That way we will know that at least that it consistently
>>> fails on this machine and is not and isolated issue.
>>
>> I just tried and v4.16-rc3 boots fine for me, repeatedly.
>>
>
> That's an interesting data point.
>
>> I guess Jeremy's model may actually have something in the TPM log
>
> I don't think so. The UEFI firmware already does some measurements and also
> does shim. So you *should* have some logs.
>
>> while my TPM log is empty... Is there anyway to make sure the TPM
>> log has some info to retreive?
>>
>
> Are you also able to read the TPM event logs?
>
> $ hexdump /sys/kernel/security/tpm0/binary_bios_measurements
Yes for me that outputs a lot of hex :)
> The UEFI firmware does some measurements and so does shim. So you should
> have some event logs. What version of shim are you using? And also would
> be good to know if it's the same shim version that Jeremy is using.
That is a very good question, I'm using: shim-ia32-13-0.7.x86_64, which is
the last version for F27 AFAICT.
But Jeremy's tablet might very well be not using the shim at all, as
I manually installed Fedora 25 on the tablet he now has, before Fedora supported
machines with 32 bit EFI. I then later did a "dnf distro-sync" to Fedora-27.
Jeremy might also very well still be booting using a grub binary I build
manually back then, without any shim being involved.
Jeremy what does efibootmgr -v output on your device ?
Regards,
Hans
next prev parent reply other threads:[~2018-03-08 16:50 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-06 16:00 Regression from efi: call get_event_log before ExitBootServices Jeremy Cline
2018-03-07 8:41 ` Thiebaud Weksteen
2018-03-07 11:16 ` Hans de Goede
2018-03-07 12:00 ` Javier Martinez Canillas
2018-03-07 17:33 ` Jeremy Cline
2018-03-08 8:45 ` Thiebaud Weksteen
2018-03-08 18:20 ` Jeremy Cline
[not found] ` <e7c2be5c-cf21-fc2d-efda-d9222d93ffad@redhat.com>
[not found] ` <b32f335c-0d77-1749-f7fe-65f512280255@redhat.com>
[not found] ` <ade378f6-c997-1d48-a30d-cceee6435fc8@redhat.com>
[not found] ` <a3b5f822-f8f4-e2f5-46da-e23e13174f28@redhat.com>
2018-03-08 16:50 ` Hans de Goede [this message]
2018-03-08 17:26 ` Jeremy Cline
2018-03-09 9:29 ` Hans de Goede
2018-03-09 10:43 ` Thiebaud Weksteen
2018-03-09 16:54 ` Jeremy Cline
2018-03-10 10:45 ` Thiebaud Weksteen
2018-03-12 10:17 ` Jarkko Sakkinen
2018-03-12 10:41 ` Paul Menzel
2018-03-16 13:01 ` Jarkko Sakkinen
2018-03-12 11:08 ` Ard Biesheuvel
2018-03-12 14:30 ` Jeremy Cline
2018-03-12 14:56 ` Ard Biesheuvel
2018-03-12 17:01 ` Jeremy Cline
2018-03-12 17:30 ` Ard Biesheuvel
2018-03-12 18:29 ` Thiebaud Weksteen
2018-03-12 18:33 ` Jeremy Cline
2018-03-12 19:55 ` Thiebaud Weksteen
2018-03-12 21:02 ` Ard Biesheuvel
2018-03-13 7:24 ` Thiebaud Weksteen
2018-03-13 8:08 ` Hans de Goede
2018-03-13 1:50 ` Jeremy Cline
2018-03-13 7:47 ` Hans de Goede
2018-03-13 7:59 ` Ard Biesheuvel
2018-03-13 8:02 ` Ard Biesheuvel
2018-03-13 10:23 ` Thiebaud Weksteen
2018-03-13 10:30 ` Ard Biesheuvel
2018-03-13 13:41 ` Jeremy Cline
2018-03-13 13:43 ` Ard Biesheuvel
2018-03-13 15:00 ` Thiebaud Weksteen
2018-03-13 12:51 ` Andy Shevchenko
2018-03-12 18:30 ` Jeremy Cline
2018-03-09 17:03 ` James Bottomley
2018-03-08 10:03 Thiebaud Weksteen
2018-03-09 10:50 Thiebaud Weksteen
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