Synchronizing an instruction cache and a data cache on demand

Electrical computers and digital processing systems: memory – Storage accessing and control – Hierarchical memories

Reexamination Certificate

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C711S141000, C710S022000

Reexamination Certificate

active

11322008

ABSTRACT:
In one embodiment, the present invention includes a method for performing a direct memory access (DMA) operation in a virtualized environment to obtain a page from a memory and store the page in a data cache, and synchronizing the page in the data cache and an instruction cache if the page implicates instruction information, otherwise not synchronizing the page. In this manner, synchronizations may be performed on demand. Other embodiments are described and claimed.

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Keir Fraser, et al., “Safe Hardware Access With The Xen Virtual Machine Monitor,” Published at the OASIS ASPLOS 2004 workshop, pp. 1-10.
Thomas Wolfgang Burger, “Cache Coherency in Itanium Processor Software,” May 2005, pp. 1-9.

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