Add attestation data command-line param name

Bug: 368024430
Bug: 360223468
Change-Id: Ia5b0ab2a40ff92e21cb47a78459d985f89cdf364

oak_dice/src/evidence.rs

@@ -56,6 +56,10 @@ pub const PUBLIC_KEY_SIZE: usize = 256;
 /// The maximum size of a serialized CWT certificate.
 pub const CERTIFICATE_SIZE: usize = 1024;
 
+/// The name of the kernel command-line parameter that is used to send the
+/// physical address of the serialized attestation data.
+pub const ATTESTATION_DATA_CMDLINE_PARAM: &str = "oak-attestation-data";
+
 /// The name of the kernel command-line parameter that is used to send the
 /// physical address of the Stage 0 DICE data struct.
 pub const DICE_DATA_CMDLINE_PARAM: &str = "oak-dice";