linux-kernel - Re: [Tee-dev] [PATCH v8 0/2] fTPM: firmware TPM running in TEE

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Date:   Wed, 07 Aug 2019 15:21:33 +0200
From:   Rouven Czerwinski <r.czerwinski@...gutronix.de>
To:     Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
        Sasha Levin <sashal@...nel.org>
Cc:     linux-kernel@...rosoft.com, linux-doc@...r.kernel.org,
        corbet@....net, linux-kernel@...r.kernel.org,
        thiruan@...rosoft.com, tee-dev@...ts.linaro.org, jgg@...pe.ca,
        ilias.apalodimas@...aro.org, rdunlap@...radead.org,
        linux-integrity@...r.kernel.org, peterhuewe@....de,
        bryankel@...rosoft.com
Subject: Re: [Tee-dev] [PATCH v8 0/2] fTPM: firmware TPM running in TEE

Hi,

I spent some time with the fTPM module and TA on a Nitrogen6X with the
latest OP-TEE master. After stumbling through the "tee_supplicant no
persistent storage" problem, my module now issues the following error
message on module load:

[   34.633252] tpm tpm0: ftpm_tee_tpm_op_send: SUBMIT_COMMAND invoke error: 0xffff0006
[   34.641035] tpm tpm0: tpm_try_transmit: send(): error -65530
[   34.647008] tpm tpm0: ftpm_tee_tpm_op_send: SUBMIT_COMMAND invoke error: 0xffff0006
[   34.654788] tpm tpm0: tpm_try_transmit: send(): error -65530
[   34.660480] ftpm-tee ftpm: ftpm_tee_probe: tpm_chip_register failed with rc=-65530
[   34.678087] ftpm-tee: probe of ftpm failed with error -65530

To me the TEE_ERROR_BAD_PARAMETERS indicates some ABI issue between the
TA and the kernel module. Note that I built the TA from 
https://github.com/microsoft/MSRSec.git with commit
6bb57db632c424f87cbaf7ec6f9c89be7682b3c0. Maybe this is not the correct
version, I had some problems building the module from the repository
mentioned in the Patches

Regards,
Rouven Czerwinski
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