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[v8,5/6] docs: document DCP-backed trusted keys kernel params

Message ID 20240403072131.54935-6-david@sigma-star.at
State Accepted
Commit b85b253e23bc985ecb0dad329da2147fb396223c
Headers show
Series [v8,1/6] crypto: mxs-dcp: Add support for hardware-bound keys | expand

Commit Message

David Gstir April 3, 2024, 7:21 a.m. UTC 
Document the kernel parameters trusted.dcp_use_otp_key
and trusted.dcp_skip_zk_test for DCP-backed trusted keys.

Co-developed-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Richard Weinberger <richard@nod.at>
Co-developed-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Signed-off-by: David Gstir <david@sigma-star.at>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
---
 Documentation/admin-guide/kernel-parameters.txt | 13 +++++++++++++
 1 file changed, 13 insertions(+)
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Patch

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 24c02c704049..3a59abf06039 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -6698,6 +6698,7 @@ 
 			- "tpm"
 			- "tee"
 			- "caam"
+			- "dcp"
 			If not specified then it defaults to iterating through
 			the trust source list starting with TPM and assigns the
 			first trust source as a backend which is initialized
@@ -6713,6 +6714,18 @@ 
 			If not specified, "default" is used. In this case,
 			the RNG's choice is left to each individual trust source.
 
+	trusted.dcp_use_otp_key
+			This is intended to be used in combination with
+			trusted.source=dcp and will select the DCP OTP key
+			instead of the DCP UNIQUE key blob encryption.
+
+	trusted.dcp_skip_zk_test
+			This is intended to be used in combination with
+			trusted.source=dcp and will disable the check if the
+			blob key is all zeros. This is helpful for situations where
+			having this key zero'ed is acceptable. E.g. in testing
+			scenarios.
+
 	tsc=		Disable clocksource stability checks for TSC.
 			Format: <string>
 			[x86] reliable: mark tsc clocksource as reliable, this