Virtualizing memory type

Details Virtualizing memory type Virtualizing memory type

2008-05-06

2008-05-06

Mclean, Kimberly (Department: 2187)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S202000, C711S203000, C711S205000, C711S206000

Reexamination Certificate

active

07370160

ABSTRACT:
A processor, capable of operation in a host machine, including memory management logic to support a plurality of memory types for a physical memory access by the processor, and virtualization support logic to determine a host memory type for a reference to a memory location by a guest in a virtual machine executable on the processor based at least in part on a memory type field stored in an entry of an extended paging table of a virtualization support system of the host machine (extended memory type field), to determine a guest memory type for the reference to the memory location, and to determine an effective memory type based on at least one of the host memory type and the guest memory type.

REFERENCES:
patent: 2003/0163662 (2003-08-01), Glew et al.
Advanced Micro Devices; “AMD64 Virtualization Codenamed “Pacifica” Technology”; Secure Virtual Machine Architecture Reference Manual; pp. 49-51; http://enterprise.amd.com/downloadables/Pacifica—Spec.pdf.
IBM System/370 Extended Architecture; Interpretive Execution; Publication No. SA22-7095-1; File No. S370-01.

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