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System and Method for Providing a Mediated External Exception Extension for a Microprocessor

  • US 20080034193A1
  • Filed: 08/04/2006
  • Published: 02/07/2008
  • Est. Priority Date: 08/04/2006
  • Status: Abandoned Application
First Claim
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1. A method, in a microprocessor, for handling external exceptions, comprising:

  • receiving, from a device external to the microprocessor, an external interrupt corresponding to an external exception;

    determining if a logical partition to which the external interrupt is directed has external interrupt handling currently enabled;

    generating a mediated exception request if the logical partition to which the external interrupt is directed does not have external interrupt handling currently enabled, whereby the mediated exception request is pending; and

    invoking an external interrupt handler to process the external interrupt in response to an operating system of the logical partition re-enabling external interrupt handling and the mediated exception request being pending.

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