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Re: [Qemu-devel] [PATCH 0/2] TPM NVRAM persistent storage
From: |
Eric Blake |
Subject: |
Re: [Qemu-devel] [PATCH 0/2] TPM NVRAM persistent storage |
Date: |
Tue, 04 Jun 2013 13:45:50 -0600 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130514 Thunderbird/17.0.6 |
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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[Qemu-devel] [PATCH 2/2] nvram: Add tpm-tis drive support, Corey Bryant, 2013/06/04
Re: [Qemu-devel] [PATCH 0/2] TPM NVRAM persistent storage, Eric Blake, 2013/06/04