System, method, and computer program product for a fully trusted adapter validation of incoming memory mapped I/O operations on a physical adapter that supports virtual adapters or virtual resources
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United States of America Patent
Stats
-
Jun 10, 2008
Grant Date -
Sep 21, 2006
app pub date -
Feb 25, 2005
filing date -
Feb 25, 2005
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method, computer program product, and distributed data processing system that allows a single physical I/O adapter to validate that a memory mapped I/O address referenced by an incoming I/O operation is associated with a virtual host that initiated the incoming memory mapped I/O operation is provided. Specifically, the present invention is directed to a mechanism for sharing a PCI family I/O adapter and, in general, any I/O adapter that uses a memory mapped I/O interface for communications. A mechanism is provided that allows a single physical I/O adapter to validate that a memory mapped I/O address referenced by an incoming memory mapped I/O operation used to initiate an I/O transaction is associated with a virtual host that initiated the incoming memory mapped I/O operation.
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- Non-US Classification not provided for expired patents
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