Re: [Qemu-devel] [PATCH v3 8/8] tpm: Added support for TPM emulator

[Stefan Berger <stefanb@linux.vnet.ibm.com>]

On 05/02/2017 01:09 PM, Marc-André Lureau wrote:
> Hi
>
> On Tue, May 2, 2017 at 8:59 PM Stefan Berger <stefanb@linux.vnet.ibm.com>
> wrote:
>
>> On 05/02/2017 12:05 PM, Marc-André Lureau wrote:
>>
>> Hi
>>
>> On Tue, May 2, 2017 at 3:53 PM Amarnath Valluri <
>> amarnath.valluri@intel.com> wrote:
>>
>>> This change introduces a new TPM backend driver that can communicate with
>>> swtpm(software TPM emulator) using unix domain socket interface.
>>>
>>> Swtpm uses two unix sockets, one for plain TPM commands and responses,
>>> and one
>>> for out-of-band control messages.
>>>
>>>
>> Let's not forget to mention the external protocol this backend rely on:
>> https://github.com/stefanberger/swtpm/wiki/Control-Channel-Specification
>>
>> The protocol documentation is quite limited.
>>
>> (I still question the need to rely on a public protocol, and a seperate
>> helper process project. If we had a qemu-swtpm, we could more easily evolve
>> the protocol in the future)
>>
>>
>> And who is going to implement that qemu-swtpm? Obviously this discussion
>> doesn't contribute to progress if nobody is doing that in the end.
>>
> The same persons who try to push for that emulated TPM code. The easiest
> approach would be to copy/adapt the swtpm code in qemu, if the licence is
> compatible. I can help with that if there is a consensus it's a better
> approach.


It's a matter of time and at least I don't have time for that. 
Nevertheless, I would suggest to reach that consensus so that we know 
what will happen to at least 8/8 of this series.