Input output value prediction with physical or virtual addressing for virtual environment

A method for input/output (I/O) value determination at a processor core, comprising:

• generating an I/O instruction comprising at least a virtual address;
• comparing the virtual address from the I/O instruction with a database of virtual addresses mapped to I/O devices and when the comparing is successful
• determining the I/O device or a state on the I/O device to receive the I/O instruction in accordance with a physical address corresponding to the virtual address;
• setting a value in a first register to a value identifying the determined I/O device or the state on the I/O device;
• predicting a value to be set in a second register in accordance with the physical address;
• and
• setting a value in a third register.

A apparatus for input/output (I/O) value determination, comprising:

• a processor core configured to generate an I/O instruction comprising at least a physical address;
• a comparator configured to compare the physical address from the I/O instruction with a database of physical addresses assigned to I/O devices;
• and
• a controller configured to receive the result from the comparator and when the comparison is successful
• determine the I/O device or a state on the I/O device to receive the I/O instruction in accordance with the physical address;
• set a value of a first register to a value identifying the determined I/O device or the state on the I/O device;
• predict a value to be set in a second register in accordance with the physical address;
• and
• set a value in a third register.

An apparatus for input/output (I/O) value determination, comprising:

• a processor core configured to generate an I/O instruction comprising at least a virtual address;
• a comparator configured to compare the virtual address from the I/O instruction with a database of virtual addresses mapped to I/O devices;
• and
• a controller configured to receive the result from the comparator and when the comparison is successful
• determine the I/O device or a state on the I/O device to receive the I/O instruction in accordance with a physical address corresponding to the virtual address;
• set a value in a first register to a value identifying the determined I/O device or the state on the I/O device;
• predict a value to be set in a second register in accordance with the physical address;
• and
• set a value in a third register.