Abstract: Techniques for migration of a source protected virtual machine from a source platform to a destination platform are descried. A method of an aspect includes enforcing that bundles of state, of a first protected virtual machine (VM), received at a second platform over a stream, during an in-order phase of a migration of the first protected VM from a first platform to the second platform, are imported to a second protected VM of the second platform, in a same order that they were exported from the first protected VM. Receiving a marker over the stream marking an end of the in-order phase. Determining that all bundles of state exported from the first protected VM prior to export of the marker have been imported to the second protected VM. Starting an out-of-order phase of the migration based on the determination that said all bundles of the state exported have been imported.

Abstract: A processor core suitable for use with a wide variety of instruction fetch units. The processor core contains a plurality of pipe stages including an instruction pointer generation stage and a decode stage. The core bundles all control necessary for downstream pipeline operation with an instruction address in a first stage. The bundle is transmitted outside the core to the instruction fetch unit. The instruction fetch unit fetches the instruction and adds it to the bundle, before forwarding the bundle as modified back within the core and down the pipeline. In this way, an external pipe stage is introduced providing a connection between discontinuous pipe stages in the core. Additionally, by bundling the control signals and address information in a single bundle that traverses the external pipe stage as a group, synchronization concerns are reduced or eliminated.

Abstract: A method of and apparatus for efficiently transferring data between a memory system and an instruction processor having a dedicated cache memory. A read request within the instruction processor for a data element not currently stored within the dedicated cache memory creates a read cache miss condition. A transfer of the eight word block containing the requested data element is initiated from the memory system beginning with the 72 bit double word containing the requested data element. The eight word block of data is placed into a block buffer upon being received by the instruction processor. The instruction processor is permitted to resume instruction execution and access to the cache memory as soon as the requested data element has been received by the block buffer. The eight word data block is transferred from the block buffer to cache memory at the next read cache miss condition.