linux-kernel - Re: [PATCH v4 1/2] selftests: tpm2: Determine available PCR bank

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Date:   Tue, 30 Nov 2021 01:39:47 +0200
From:   Jarkko Sakkinen <jarkko@...nel.org>
To:     Stefan Berger <stefanb@...ux.vnet.ibm.com>
Cc:     linux-integrity@...r.kernel.org, peterhuewe@....de,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
        skhan@...uxfoundation.org, Stefan Berger <stefanb@...ux.ibm.com>
Subject: Re: [PATCH v4 1/2] selftests: tpm2: Determine available PCR bank

On Sat, Nov 27, 2021 at 11:10:51PM -0500, Stefan Berger wrote:
> From: Stefan Berger <stefanb@...ux.ibm.com>
> 
> Determine an available PCR bank to be used by a test case by querying the
> capability TPM2_GET_CAP. The TPM2 returns TPML_PCR_SELECTIONS that
> contains an array of TPMS_PCR_SELECTIONs indicating available PCR banks
> and the bitmasks that show which PCRs are enabled in each bank. Collect
> the data in a dictionary. From the dictionary determine the PCR bank that
> has the PCRs enabled that the test needs. This avoids test failures with
> TPM2's that either to not have a SHA-1 bank or whose SHA-1 bank is
> disabled.
> 
> Signed-off-by: Stefan Berger <stefanb@...ux.ibm.com>

Acked-by: Jarkko Sakkinen <jarkko@...nel.org>

/Jarkko