Re: [Qemu-devel] [PATCH 0/2] TPM NVRAM persistent storage

[Eric Blake]

On 06/04/2013 01:35 PM, Corey Bryant wrote:
> 
> 
> On 06/04/2013 03:23 PM, Eric Blake wrote:
>> On 06/04/2013 12:18 PM, Corey Bryant wrote:
>>> This patch series provides persistent storage support that a TPM
>> can use to store NVRAM data.  It uses QEMU's block driver to store
>>> data on a drive image.  The libtpms TPM 1.2 backend will be the
>>> initial user of this functionality to store data that must persist
>>> through a reboot or migration.  A sample command line may look like
>>> this:
>>>
>>> qemu-system-x86_64 ...
>>> -drive file=/path/to/nvram.qcow2,id=drive-nvram0-0-0
>>> -tpmdev libtpms,id=tpm-tpm0
>>> -device tpm-tis,tpmdev=tpm-tpm0,id=tpm0,drive=drive-nvram0-0-0
>>
>> Is a TPM device hot-pluggable?  If so, do you have a design for the QMP
>> counterpart in mind?
>>
> 
> Well the TPM is not hot-pluggable.  And the feedback we've been getting
> is to simplify this support so I'm not sure it's needed/wanted. (?)

Fair enough - just making sure we aren't forgetting something where it
makes sense, but I agree with your point that for TPM, hot-plug does NOT
make sense :)

-- 
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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