Copying to list, so others can give their opinions.
-------- Mensagem original --------
Assunto: Re: [TrouSerS-tech] ST33 I2C TPM issues
Data: Tue, 05 Nov 2013 09:31:21 -0200
De: Richard <[email protected]>
Para: Ceri Coburn <[email protected]>
Answers in line
Em 05-11-2013 08:05, Ceri Coburn escreveu:
After further investigation, error 0x801 is indeed
TPM_NEEDS_SELFTEST. But is does stipulate in the TPM Main Part 3
Commands Specification under section 4.2
Nice. Looks like I overlooked this information.
*Description*
1. Prior to executing the actions of TPM_ContinueSelfTest, if the TPM
receives a command
C1 that uses an untested TPM function, the TPM MUST take one of these
actions:
a.The TPM MAY return TPM_NEEDS_SELFTEST
i. This indicates that the TPM has not tested the internal resources
required to execute C1.
ii. The TPM does not execute C1.
iii. The caller MUST issue TPM_ContinueSelfTest before re-issuing the
command C1.
(1) If the TPM permits TPM_SelfTestFull prior to completing the
actions of TPM_ContinueSelfTest, the caller MAY issue TPM_SelfTestFull
rather than TPM_ContinueSelfTest.
b. The TPM MAY return TPM_DOING_SELFTEST
i. This indicates that the TPM is doing the actions of
TPM_ContinueSelfTest implicitly, as if the TPM_ContinueSelfTest
command had been issued.
ii. The TPM does not execute C1
iii. The caller MUST wait for the actions of TPM_ContinueSelfTest to
complete before reissuing the command C1.
b.The TPM MAY return TPM_SUCCESS or an error code associated with C1.
i. This indicates that the TPM has completed the actions of
TPM_ContinueSelfTest and has completed the command C1.
ii. The error code MAY be TPM_FAILEDSELFTEST.
Please forgive the formatting, cut and paste from Acrobat wasn't
forgiving.
With that in mind, should it not be the job of the tcsd daemon to
execute TPM_SelfTestFull/TPM_ContinueSelfTest if the initial
GetCapability command fails with TPM_NEEDS_SELFTEST? I'm happy to
look into this and supply patches if necessary.
To answer this, I'll have to read the TSS documentation to see if there
is any explicit mention to that.
However, it looks a device driver specific attribution to me.
Regards,
Ceri
*From:*Richard [mailto:[email protected]]
*Sent:* 04 November 2013 17:45
*To:* [email protected]
*Subject:* Re: [TrouSerS-tech] ST33 I2C TPM issues
Ceri,
I found this by searching on google:
https://groups.google.com/a/chromium.org/forum/#!topic/chromium-os-checkins/iJjc8Mzzzow
<https://groups.google.com/a/chromium.org/forum/#%21topic/chromium-os-checkins/iJjc8Mzzzow>
Looks like it's a known characteristic of STM TPMs, which needs to run
the self test after resume operations.
I suggest you take a look at the kernel source of your system and
check if the changes mentioned in this thread were applied to your kernel.
Em 04-11-2013 13:49, Richard escreveu:
Hi Ceri,
I saw something about it in the tpm-dd mailing list. I'll investigate
and get back to you if I find something.
Em 02-11-2013 10:02, Ceri Coburn escreveu:
Hi All,
Up until now I have been using the TPM emulator project for
interfacing with a TPM which has worked great. I am now in the
process of starting to test my TPM unit tests on a real TPM that we
intend on using for our project.
Upon starting the tcsd daemon it fails instantly with the following
output.
TCSD tcsd_conf.c:94 platform_class_list_append:
platform_class_list_append start:
TCSD tcsd_conf.c:126 platform_class_list_append: Platform Class Added.
TCSD TCS tcsi_caps_tpm.c:43 Entering Get Cap
To TPM: 00 C1 00 00 00 12 00 00 00 65 00 00 00 1A 00 00
To TPM: 00 00
TCSD TDDL tddl.c:171 Calling write to driver
TCSD TDDL tddl.c:188 ioctl: (25) Inappropriate ioctl for device
TCSD TDDL tddl.c:189 Falling back to Read/Write device support.
>From TPM: 00 C4 00 00 00 1E 00 00 00 00 00 00 00 10 00 30
>From TPM: 01 02 0D 0A 00 02 03 53 54 4D 20 00 01 4B
TCSD TCS tcsi_caps_tpm.c:43 Entering Get Cap
To TPM: 00 C1 00 00 00 16 00 00 00 65 00 00 00 01 00 00
To TPM: 00 04 00 00 00 B4
TCSD TDDL tddl.c:171 Calling write to driver
>From TPM: 00 C4 00 00 00 0A 00 00 08 01
LOG_RETERR TPM tcsi_caps_tpm.c:52: 0x801
TCSD TCS ERROR: tcs_caps.c:191 TCS GetCapability failed with result =
0x801
Would anyone know if this a problem with the ST33 TPM driver or
something inside TrouSerS?
Thanks.
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