On Fri, Jan 13, 2017 at 01:09:29PM -0500, Stefan Berger wrote:
> On 01/11/2017 02:54 AM, Nayna Jain wrote:
> > Unlike the device driver support for TPM 1.2, the TPM 2.0 does
> > not support the securityfs pseudo files for displaying the
> > firmware event log.
> >
> > This patch enables support for providing the TPM 2.0 event log in
> > binary form. TPM 2.0 event log supports a crypto agile format that
> > records multiple digests, which is different from TPM 1.2. This
> > patch enables the tpm_bios_log_setup for TPM 2.0 and adds the
> > event log parser which understand the TPM 2.0 crypto agile format.
> >
> > Signed-off-by: Nayna Jain <na...@linux.vnet.ibm.com>
> > ---
> > drivers/char/tpm/Makefile | 2 +-
> > .../char/tpm/{tpm_eventlog.c => tpm1_eventlog.c} | 35 ++--
> > drivers/char/tpm/tpm2_eventlog.c | 203
> > +++++++++++++++++++++
> > drivers/char/tpm/tpm_acpi.c | 3 +
> > drivers/char/tpm/tpm_eventlog.h | 63 +++++++
> > 5 files changed, 291 insertions(+), 15 deletions(-)
> > rename drivers/char/tpm/{tpm_eventlog.c => tpm1_eventlog.c} (95%)
> > create mode 100644 drivers/char/tpm/tpm2_eventlog.c
> >
> >
> > diff --git a/drivers/char/tpm/tpm_acpi.c b/drivers/char/tpm/tpm_acpi.c
> > index b7718c9..169edf3 100644
> > --- a/drivers/char/tpm/tpm_acpi.c
> > +++ b/drivers/char/tpm/tpm_acpi.c
> > @@ -54,6 +54,9 @@ int tpm_read_log_acpi(struct tpm_chip *chip)
> > u64 len, start;
> > struct tpm_bios_log *log;
> >
> > + if (chip->flags & TPM_CHIP_FLAG_TPM2)
> > + return -ENODEV;
> > +
>
>
> Works with SeaBIOS when this check is disabled.
What about OF call paths?
> Stefan
/Jarkko
