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    SubjectRe: A set of "standard" virtual devices?
    Date
    On Monday 02 April 2007 23:33:01 Jeff Garzik wrote:
    > Andi Kleen wrote:
    > >> How would that work in the case where virtualized guests don't have a
    > >> visible PCI bus, and the virtual environment doesn't pretend to emulate
    > >> a PCI bus?
    > >
    > > If they emulated one with the appropiate device
    > > then distribution driver auto probing would just work transparently for them.
    >
    > Yes, but, ideally with paravirtualization you should be able to avoid
    > the overhead of emulating many major classes of device (storage,
    > network, RNG, etc.) by developing a low-overhead passthrough interface
    > that does not involve PCI at all.

    The implementation wouldn't need to use PCI at all. There wouldn't
    even need to be PCI like registers internally. Just a pci device
    with an ID somewhere in sysfs. PCI with unique IDs
    is just a convenient and well established key into the driver module
    collection. Once you have the right driver it can do what it wants.

    -Andi
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