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IBM Secure Execution guests may want to share additional secrets with the Ultravisor in a secure manner. For this the concept of secret requests and three new Ultravisor-calls were introduced. Add support to genprotimg to prepare an Secure Execution image with the requirement that add-secret requests must provide an extension secret that matches the customer communication key (CCK) derived extension secret. Reviewed-by: Steffen Eiden <seiden@linux.ibm.com> Signed-off-by: Marc Hartmayer <mhartmay@linux.ibm.com> Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>