Aperture access processors, methods, systems, and instructions

A method performed by a processor comprising:

• receiving an aperture write instruction at the processor, the aperture write instruction indicating a source operand;
• reading a host physical memory address, which is associated with an aperture in system memory, from an access protected structure, in response to the aperture write instruction;
• and
• storing data received from the source operand within the aperture to a host physical memory address that is not obtained through address translation, in response to the aperture write instruction.

An article of manufacture comprising a non-transitory machine-readable storage medium, the non-transitory machine-readable storage medium storing instructions that if executed by a machine are to cause the machine to perform operations comprising:

• allocate a region of system memory for an aperture;
• store a host physical memory address, which is to be associated with the aperture, in an access protected structure;
• and
• make host physical memory addresses of the aperture not accessible through a second level of hierarchical paging structures.

A system to process instructions comprising:

• an interconnect;
• a processor coupled with the interconnect, the processor to receive an aperture access instruction, the processor, in response to the aperture access instruction, to:
• read a host physical memory address, which is to be associated with an aperture that is to be in system memory, from an access protected structure;
• and
• access data within the aperture at a host physical memory address that is not to be obtained through address translation;
• and
• a dynamic random access memory (DRAM) coupled with the interconnect.