[vfio-users] Using 64-bit BAR

[Vrajesh N. Patel]

Hello,
I have a 10 GigE PCIe card used for data network that we are doing pci-passthrough to our VM.  The software interfacing with the card requires a large memory space of 4-16GB.  We encounter problems immediately when the software starts because the PCI BAR is using 32-bit addressing, but the card is looking for 64-bit addressing.I looked at the qemu command line and the pci-passthrough is using vfio driver.  Is there a parameter, or configuration setting that can be altered to support 64-bit BAR addressing?  I am running CentOS 7.3 with qemu version 2.0.0-1.
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