[PATCH 7/9] test: use a non system PCR for testing PCR extend

Simon Glass sjg at chromium.org
Wed May 10 16:31:53 CEST 2023

Hi Ilias,

On Wed, 10 May 2023 at 01:44, Ilias Apalodimas
<ilias.apalodimas at linaro.org> wrote:
> We currently use PCR 0 for testing the PCR read/extend functionality in
> our selftests.  How ever those PCRs are defined by the TCG spec for
> platform use.  For example if the tests run *after* the efi subsystem
> initialization, which extends PCRs 0 & 7 it will give a false positive.
> So let's switch over to a PCR which is more suitable and is defined for
> OS use.  It's worth noting that we are using PCR10 here, since PCR9 is
> used internally by U-Boot if we choose to measure the loaded DTB
> Signed-off-by: Ilias Apalodimas <ilias.apalodimas at linaro.org>
> ---
>  test/py/tests/test_tpm2.py | 14 +++++++-------
>  1 file changed, 7 insertions(+), 7 deletions(-)

We should be able to reset the tpm emulator in state_reset_for_test().


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