Patent attributes
Technologies for zero-copy inter-virtual-machine communication include a computing device with extended page table support. A sender virtual machine stores data in a shared memory block and enables access to protected code without generating a virtual machine exit, for example by executing a specialized processor instruction. From the protected code, the sender virtual machine sets a permission in an extended page table associated with the shared memory block and notifies a receiver virtual machine. When the permission is set, the sender virtual machine is prohibited from writing or executing the contents of the shared memory block. The receiver virtual machine reads data from the shared memory block and then enables access to protected code without generating a virtual machine exit. From the protected code, the receiver virtual machine clears the permission and notifies the sender virtual machine that reading is complete. Other embodiments are described and claimed.
