On 06/14/2013 11:38 AM, Anthony Liguori wrote:
Corey Bryant <cor...@linux.vnet.ibm.com> writes:
On 06/14/2013 10:01 AM, Anthony Liguori wrote:
Corey Bryant <cor...@linux.vnet.ibm.com> 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
Fair enough. I assume you're ok with this code though?
I don't understand why it's needed to be honest. I suspect this has to
do with the fact that the libtpms implementation will need significant
reworking.
libtpms does not implement a file storage layer. It neither writes data
into a FILE * nor into a QEMU BDRV. Instead it provides callbacks for
users to implement the file storage layer. Is there a problem with that?
Regards,
Stefan
Regards,
Anthony Liguori
--
Regards,
Corey Bryant
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
