[PATCH] docs: tpm: Clarify omission or removal of active_pcr_banks node
stefanb at linux.ibm.com
Wed Jan 12 15:49:52 UTC 2022
Add a sentence to the active_pcr_banks node documentation that clarifies
that when the active_pcr_banks node is removed from the XML or when it
is omitted that the set of active PCR banks is not changed anymore.
Signed-off-by: Stefan Berger <stefanb at linux.ibm.com>
docs/formatdomain.rst | 2 ++
1 file changed, 2 insertions(+)
diff --git a/docs/formatdomain.rst b/docs/formatdomain.rst
index d4f30bb8af..a84be77c37 100644
@@ -7640,6 +7640,8 @@ Example: usage of the TPM Emulator
of a TPM 2.0 to activate. Valid names are for example sha1, sha256, sha384,
and sha512. If this node is provided, the set of PCR banks are activated
before every start of a VM and this step is logged in the swtpm's log.
+ If this node is removed or omitted then libvirt will not modify the
+ active PCR banks upon VM start but leave them at their last configuration.
This attribute requires that swtpm_setup v0.7 or later is installed
and may not have any effect otherwise. The selection of PCR banks only works
with the ``emulator`` backend. since:`Since 7.10.0`
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