linux-kernel - Re: [PATCH v2 0/3] Extend the vTPM proxy driver to pass locality to emulator

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Message-Id: <72bacff5-5213-b114-ebf4-6e3fe7284bdc@linux.vnet.ibm.com>
Date:   Wed, 3 May 2017 19:42:06 -0400
From:   Stefan Berger <stefanb@...ux.vnet.ibm.com>
To:     Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
Cc:     tpmdd-devel@...ts.sourceforge.net,
        linux-security-module@...r.kernel.org,
        jgunthorpe@...idianresearch.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 0/3] Extend the vTPM proxy driver to pass locality to
 emulator

On 05/03/2017 06:38 PM, Jarkko Sakkinen wrote:
> On Fri, Apr 28, 2017 at 09:02:15AM -0400, Stefan Berger wrote:
>> The purpose of this series of patches is to enable the passing of the locality
>> a command is executing in to a TPM emulator. To enable this we introduce a new
>> flag for the device creation ioctl that requests that the locality be prepended
>> to every command. For applications to check which flags the driver supports, we
>> add a new ioctl that returns a bitmask of supported flags.
> This is a weird change proposal as you could use tpm_vtpm_proxy for
> other than some TPM emulator.

I think in most cases the recipient of the TPM commands from the 
vtpm_proxy driver will be a TPM emulator. What do you have in mind?

>
>> v1->v2:
>>    - fixed return value from function in patch 3/3
>>
>>
>> Stefan Berger (3):
>>    tpm: vtpm_proxy: Add ioctl to get supported flags
>>    tpm: vtpm_proxy: Implement request_locality
>>    tpm: vtpm_proxy: Add ioctl to request locality prepended to command
>>
>>   drivers/char/tpm/tpm_vtpm_proxy.c | 53 +++++++++++++++++++++++++++++++++++----
>>   include/uapi/linux/vtpm_proxy.h   | 15 ++++++++++-
>>   2 files changed, 62 insertions(+), 6 deletions(-)
>>
>> -- 
>> 2.4.3
>>
> /Jarkko
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