Re: [Qemu-devel] [PATCH v3 0/3] TPM NVRAM persistent storage

[Anthony Liguori]

Corey Bryant <address@hidden> writes:

> 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:

This should be folded into the libtpms backend series.

There are no users for this so this would just be untestable code in the
tree subject to bitrot.

Regards,

Anthony Liguori

>
> 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
>
> Thanks,
> Corey
>
> Corey Bryant (3):
>   nvram: Add TPM NVRAM implementation
>   nvram: Add tpm-tis drive support
>   TPM NVRAM test
>
>  hw/tpm/Makefile.objs     |    1 +
>  hw/tpm/tpm_int.h         |    2 +
>  hw/tpm/tpm_nvram.c       |  324 
> ++++++++++++++++++++++++++++++++++++++++++++++
>  hw/tpm/tpm_nvram.h       |   25 ++++
>  hw/tpm/tpm_passthrough.c |   85 ++++++++++++
>  hw/tpm/tpm_tis.c         |    8 +
>  6 files changed, 445 insertions(+), 0 deletions(-)
>  create mode 100644 hw/tpm/tpm_nvram.c
>  create mode 100644 hw/tpm/tpm_nvram.h