[mvebu,2/2] firmware: turris-mox-rwtm: add debugfs documentation
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Message ID 20200601210050.31821-2-marek.behun@nic.cz
State New
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  • [mvebu,1/2] firmware: turris-mox-rwtm: support ECDSA signatures via debugfs
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Commit Message

Marek Behún June 1, 2020, 9 p.m. UTC
Add debugfs ABI documentation for the ECDSA signatures.

Signed-off-by: Marek Behún <marek.behun@nic.cz>
 Documentation/ABI/testing/debugfs-turris-mox-rwtm | 9 +++++++++
 1 file changed, 9 insertions(+)
 create mode 100644 Documentation/ABI/testing/debugfs-turris-mox-rwtm

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diff --git a/Documentation/ABI/testing/debugfs-turris-mox-rwtm b/Documentation/ABI/testing/debugfs-turris-mox-rwtm
new file mode 100644
index 000000000000..2b3255ee68fd
--- /dev/null
+++ b/Documentation/ABI/testing/debugfs-turris-mox-rwtm
@@ -0,0 +1,9 @@ 
+What:		/sys/kernel/debug/turris-mox-rwtm/do_sign
+Date:		Jun 2020
+KernelVersion:	5.8
+Contact:	Marek Behún <marek.behun@nic.cz>
+Description:	(W) Message to sign with the ECDSA private key stored in
+		    device's OTP. The message must be exactly 64 bytes (since
+		    this is intended for SHA-512 hashes).
+		(R) The resulting signature, 136 bytes. This contains the R and
+		    S values of the ECDSA signature, both in big-endian format.