Method and apparatus for supporting assignment of devices of virtual machines
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United States of America Patent
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Oct 7, 2014
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app pub date -
Sep 14, 2006
filing date -
Sep 14, 2006
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Abstract
A processing system includes at least one processing unit, at least one bus, and at least one device on the bus. A virtual machine monitor (VMM) in the processing system determines whether a base address register (BAR) of the device specifies a barred region size of less than one page. If the BAR specifies a barred region size of less than one page, the VMM reports to a virtual machine (VM) in the processing system, on behalf of the device, that the BAR specifies a barred region size of at least one page. In one embodiment, the bus comprises a peripheral component interconnect (PCI) bus, such as a PCI Express (PCIe) bus or a PCI Extended (PCI-X) bus. The device may be a video controller, a network interface controller (NIC), or any other suitable device. Other embodiments are described and claimed.
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