FUNCTION TRANSFER USING VIRTUALIZED MAPPING

FUNCTION TRANSFER USING VIRTUALIZED MAPPING

The present disclosure includes a method for migration of a first virtual function of a first device located on a PCI bus and accessible by a device driver using a virtual address. A second virtual function is created on a second device. A base address is determined for the second virtual function a...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: MOORE SHANNON D, JIANG LIANG, KALAVAKOLANU ANIL, WALLIS ROBERT E, HART BRIAN W, YEUNG EVELYN T
Format: Patent
Sprache:eng
Schlagworte:
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Beschreibung
Zusammenfassung:The present disclosure includes a method for migration of a first virtual function of a first device located on a PCI bus and accessible by a device driver using a virtual address. A second virtual function is created on a second device. A base address is determined for the second virtual function as a function of a logical location of the second device within the PCI structure. An offset is determined for the second virtual function as a function of the base address and the virtual address. The device driver is notified that the first virtual function is on hold. The offset is stored in a translation table. The device driver is notified that the hold has been lifted. Accesses to the virtual address and by the device driver to memory of the second virtual function are routed based upon the offset in the translation table.