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For the physical function driver, the transmit queue needs to be configured to be associated with the relevant physical function number. This is currently obtained from the bus:dev.fn address of the underlying PCI device. In the case of a virtual machine using the physical function via PCI passthrough, the PCI bus:dev.fn address within the virtual machine is unrelated to the real physical function number. Such a function will typically be presented to the virtual machine as a single-function device. The function number extracted from the PCI bus:dev.fn address will therefore always be zero. Fix by reading from the Function Requester ID Information Register, which always returns the real PCI bus:dev.fn address as used by the physical host. Signed-off-by: Michael Brown <mcb30@ipxe.org>
iPXE README File Quick start guide: cd src make For any more detailed instructions, see http://ipxe.org