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ABI: add sysfs description for tpm exports of PCR registers

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Adds the ABI entries for the new

/sys/class/tpm/tpm<n>/pcr-<hash>/<m>

files which are added to export the PCR hash values on a one value per
file basis.

Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Acked-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
This commit is contained in:
James Bottomley 2021-01-13 15:26:34 -08:00 committed by Jarkko Sakkinen
parent aab73d9524
commit 52d0848e1d
1 changed files with 14 additions and 0 deletions
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14
Documentation/ABI/stable/sysfs-class-tpm
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@ -194,3 +194,17 @@ Description: The "tpm_version_major" property shows the TCG spec major version
Example output::
2
What: /sys/class/tpm/tpmX/pcr-H/N
Date: March 2021
KernelVersion: 5.12
Contact: linux-integrity@vger.kernel.org
Description: produces output in compact hex representation for PCR
number N from hash bank H. N is the numeric value of
the PCR number and H is the crypto string
representation of the hash
Example output::
cat /sys/class/tpm/tpm0/pcr-sha256/7
2ED93F199692DC6788EFA6A1FE74514AB9760B2A6CEEAEF6C808C13E4ABB0D42