Abstract: Some aspects include reception of a command from one of a chassis management module and a BIOS specifying a data region to be updated and a locking policy, determination of whether the data region is locked, implementation of the locking policy and returning of a session lock handle if it is determined that the data region is not locked, reception, from the one of the chassis management module and the BIOS, of data for updating the data region, the session lock handle, and an offset, determination that the session lock handle is associated with the data region, writing of the data to the data region at the offset, reception of a request for data of the updated data region from the other one of the chassis management module and the BIOS, determination of whether the updated data region is locked, and if it is determined that the updated data region is not locked, providing of the data of the updated data region to the other one of the chassis management module and the BIOS.

Abstract: Some aspects include reception of a command from one of a chassis management module and a BIOS specifying a data region to be updated and a locking policy, determination of whether the data region is locked, implementation of the locking policy and returning of a session lock handle if it is determined that the data region is not locked, reception, from the one of the chassis management module and the BIOS, of data for updating the data region, the session lock handle, and an offset, determination that the session lock handle is associated with the data region, writing of the data to the data region at the offset, reception of a request for data of the updated data region from the other one of the chassis management module and the BIOS, determination of whether the updated data region is locked, and if it is determined that the updated data region is not locked, providing of the data of the updated data region to the other one of the chassis management module and the BIOS.