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SubjectRE: [PATCH 0/5] Extend TPM PPI interface to support revision 1.3
Date
> -----Original Message-----
> From: linux-integrity-owner@vger.kernel.org <linux-integrity-
> owner@vger.kernel.org> On Behalf Of Stefan Berger
> Sent: Wednesday, January 09, 2019 5:11 PM
> To: linux-integrity@vger.kernel.org; jarkko.sakkinen@linux.intel.com
> Cc: linux-security-module@vger.kernel.org; linux-kernel@vger.kernel.org;
> Stefan Berger <stefanb@linux.vnet.ibm.com>
> Subject: EXT: [PATCH 0/5] Extend TPM PPI interface to support revision 1.3
>
> This series of patches extends the TPM subsystem's PPI support to support
> TPM PPI revision 1.3 where more commands are supported (up to 101) and
> the TPM 2 command code '23' takes an additional parameter.
>
> For the command code '23' see this document here on document page 39:
> https://trustedcomputinggroup.org/wp-content/uploads/Physical-
> Presence-Interface_1-30_0-52.pdf
>
> Stefan

You might mention that this is an important feature, as on at least some
systems, ppi function 23 is the only way to enable/disable PCR banks.

I have tested this patch set on my HP Spectre laptop, and I am finally
able to turn the sha-1 bank on and off. Much appreciated!

Tested-by: David Safford <david.safford@ge.com>

>
> Stefan Berger (5):
> tpm: ppi: pass function revision ID to tpm_eval_dsm()
> tpm: ppi: rename TPM_PPI_REVISION_ID to TPM_PPI_REVISION_1
> tpm: ppi: Display up to 101 operations as define for version 1.3
> tpm: ppi: Possibly show command parameter if TPM PPI 1.3 is used
> tpm: ppi: Enable submission of optional command parameter for PPI 1.3
>
> drivers/char/tpm/tpm_ppi.c | 78 ++++++++++++++++++++++++++++--------
> --
> 1 file changed, 58 insertions(+), 20 deletions(-)
>
> --
> 2.17.1

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