I know that vfio can expose interrupt, DMA and pci I/O to userspace. I read that if someone want to take advantage of vfio for pci devices, he has to unbind the original driver and bind to vfio-pci driver. So my question is, is vfio-pci a userspace driver for all pci devices? Because in my understanding, vfio just offers some basic interfaces. Or, if I need a driver for a new pci device, should I just use vfio-pci driver or use interfaces it offers to write a new driver?
Is vfio-pci a userspace driver for all pci devices?
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