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

[Corey Bryant <coreyb@linux.vnet.ibm.com>]

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. (?)

-- 
Regards,
Corey Bryant

>>
>> Thanks,
>> Corey
>>
>> Corey Bryant (2):
>>    nvram: Add TPM NVRAM implementation
>>    nvram: Add tpm-tis drive support
>>
>>   hw/tpm/Makefile.objs |    1 +
>>   hw/tpm/tpm_int.h     |    2 +
>>   hw/tpm/tpm_nvram.c   |  399 ++++++++++++++++++++++++++++++++++++++++++++++++++
>>   hw/tpm/tpm_nvram.h   |   25 +++
>>   hw/tpm/tpm_tis.c     |    8 +
>>   5 files changed, 435 insertions(+), 0 deletions(-)
>>   create mode 100644 hw/tpm/tpm_nvram.c
>>   create mode 100644 hw/tpm/tpm_nvram.h
>>
>>
>>
>>
>