International Business Machines Corporation

Steven L Jones

George D Lauer

Henry R Coy

Michael Joseph Corrigan

Larry Wayne Loen

Philip Braun Winterfield

David Robert Russell, Jr

Processing a plurality of packets through at least one service, a privilege granter monitors at least two authentication packets to obtain a source unique network identifier, one of which does not have a vendor specific attribute and detects an authentication packet among the at least two authentication packets, and the authentication packet having the vendor specific attribute. The privilege granter receives at least one response authentication packet having at least one service definition identifier, the service definition identifier corresponding to the source unique network identifier, responsive to detecting the authentication packet having the vendor specific attribute and builds an entitlement database to pair the source unique network identifier to the service definition identifier. The privilege granter receives a session packet and determines that the source unique network identifier corresponds to a user entitlement in the entitlement database. The privilege granter routes the session packet to an addressable service.

Service segregation according to subscriber service association

A synchronous interrupt handler for a processing system executing multiple modes of operation employs a minimum number of lines of interrupt handler code written to execute at the 'zeroth' level, is combined with a virtualized interrupt vector table. An identical zeroeth level handler is inserted at each of the processor's interrupt vector entry pints. These short code sequences are the first to gain control following an interrupt. They are handwritten in the platform's native instruction set to be mode-independent. For example, if the platform's processor does not alter the 'endianness' of the machine state following an interrupt, the 'zeroeth level' code must be written for endian neutrality; likewise, for 32/64-bit mode, etc. For each mode of operation, there is created a Virtualized Vector Table to represent the proper interrupt handlers for each physical interrupt level. Each task data structure, implicitly reflecting its unique mode of operation, contains a pointer to its virtualized vector table. The zeroeth-level handlers then extract the virtualized vector table reference for their own interrupt level and indirectly pass control to the preloaded table value.

Integrating multi-modal synchronous interrupt handlers for computer

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Austin, TX, United States of America

Steven L Jones