linux-kernel - Re: [tpmdd-devel] [PATCH v5 3/3] tpm: add securityfs support for TPM 2.0 firmware event log

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Message-Id: <11f97863-aa40-a9aa-836f-4b446faf1ed3@linux.vnet.ibm.com>
Date:   Thu, 24 Nov 2016 21:51:03 -0500
From:   Stefan Berger <stefanb@...ux.vnet.ibm.com>
To:     Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
        Nayna Jain <nayna@...ux.vnet.ibm.com>
Cc:     linux-kernel@...r.kernel.org,
        linux-security-module@...r.kernel.org,
        tpmdd-devel@...ts.sourceforge.net
Subject: Re: [tpmdd-devel] [PATCH v5 3/3] tpm: add securityfs support for TPM
 2.0 firmware event log

On 11/24/2016 04:10 PM, Jarkko Sakkinen wrote:
> On Wed, Nov 23, 2016 at 12:27:37PM -0500, Nayna Jain wrote:
>> Unlike the device driver support for TPM 1.2, the TPM 2.0 does
>> not support the securityfs pseudo files for displaying the
>> firmware event log.
>>
>> This patch enables support for providing the TPM 2.0 event log in
>> binary form. TPM 2.0 event log supports a crypto agile format that
>> records multiple digests, which is different from TPM 1.2. This
>> patch enables the tpm_bios_log_setup for TPM 2.0  and adds the
>> event log parser which understand the TPM 2.0 crypto agile format.
>>
>> Signed-off-by: Nayna Jain <nayna@...ux.vnet.ibm.com>
> I don't want to say much about this before I've tested it. I wonder
> what cheap hardware I could use to test this. Any advice is on this
> from anyone is much appreciated.

Virtual hardware would be cheap :-)

I tested this series with QEMU + vTPM + SeaBIOS with TPM 1.2 + TPM 2 
support (basing the log on ACPI). I had to fix an endianess issue on the 
SeaBIOS side, which made it work. So for this version of the patches I 
can give it my tested-by:

Tested-by: Stefan Berger <stefanb@...ux.vnet.ibm.com>


>
> /Jarkko
>
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